Bumping version

Signed-off-by: Mike Farah <mikefarah@gmail.com>

.dockerignore

@@ -1 +1 @@
-bin
+bin/*

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: mikefarah

.github/ISSUE_TEMPLATE/bug_report_v3.md

@@ -1,49 +0,0 @@
----
-name: Bug report - V3
-about: Create a report to help us improve
-title: ''
-labels: bug, v3
-assignees: ''
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-Version of yq: 3.X.X
-Operating system: mac/linux/windows/....
-Installed via: docker/binary release/homebrew/snap/...
-
-**Input Yaml**
-Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
-data1.yml:
-```yaml
-this: should really work
-```
-
-data2.yml:
-```yaml
-but: it strangely didn't
-```
-
-**Command**
-The command you ran:
-```
-yq merge data1.yml data2.yml
-```
-
-**Actual behavior**
-
-```yaml
-cat: meow
-```
-
-**Expected behavior**
-
-```yaml
-this: should really work
-but: it strangely didn't
-```
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/bug_report_v4.md

@@ -10,6 +10,8 @@ assignees: ''
 **Describe the bug**
 A clear and concise description of what the bug is.
 
+Note that any how to questions should be posted in the discussion board and not raised as an issue.
+
 Version of yq: 4.X.X
 Operating system: mac/linux/windows/....
 Installed via: docker/binary release/homebrew/snap/...
@@ -32,13 +34,13 @@ The command you ran:
 yq eval-all 'select(fileIndex==0) | .a.b.c' data1.yml data2.yml
 ```
 
-**Actual behavior**
+**Actual behaviour**
 
 ```yaml
 cat: meow
 ```
 
-**Expected behavior**
+**Expected behaviour**
 
 ```yaml
 this: should really work

.github/ISSUE_TEMPLATE/feature_request.md

@@ -9,9 +9,11 @@ assignees: ''
 
 **Please describe your feature request.**
 A clear and concise description of what the request is and what it would solve. 
-Ex. I wish I could use yq to [...]
+Eg. I wish I could use yq to [...]
 
-Please note that V3 will no longer have any enhancements.
+Note:
+- how to questions should be posted in the discussion board and not raised as an issue.
+- V3 will no longer have any enhancements.
 
 **Describe the solution you'd like**
 If we have data1.yml like:
@@ -24,7 +26,7 @@ country: Australia
 And we run a command:
 
 ```bash
-yq eval 'predictWeatherOf(.country)'
+yq 'predictWeatherOf(.country)'
 ```
 
 it could output

.github/dependabot.yml

@@ -0,0 +1,22 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: docker
+    directory: /
+    schedule:
+      day: thursday
+      interval: weekly
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      day: thursday
+      interval: weekly
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      day: thursday
+      interval: weekly

.github/instructions/instructions.md

@@ -0,0 +1 @@
+When you find a bug - make sure to include a new test that exposes the bug, as well as the fix for the bug itself.

.github/workflows/codeql.yml

@@ -0,0 +1,72 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '24 3 * * 1'
+
+permissions: {}
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1

.github/workflows/docker-release.yml

@@ -0,0 +1,105 @@
+name: Release Docker
+
+on:
+  release:
+    types: [released]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+permissions: {}
+
+jobs:
+  publishDocker:
+    environment: dockerhub
+    env:
+      IMAGE_NAME: mikefarah/yq
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
+        with:
+          version: latest
+
+      - name: Available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }} && docker version
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        run: |
+          echo "GithubRef: ${GITHUB_REF}"
+          VERSION=${GITHUB_REF##*/}
+          echo "VERSION: ${VERSION}"
+          IMAGE_VERSION=${VERSION:1}
+          echo "IMAGE_VERSION: ${IMAGE_VERSION}"
+
+          PLATFORMS="linux/amd64,linux/ppc64le,linux/arm64,linux/arm/v7,linux/s390x"
+
+          echo "Building and pushing version ${IMAGE_VERSION} of image ${IMAGE_NAME}"
+          docker buildx build \
+            --label "org.opencontainers.image.authors=https://github.com/mikefarah/yq/graphs/contributors" \
+            --label "org.opencontainers.image.created=$(date --rfc-3339=seconds)" \
+            --label "org.opencontainers.image.description=yq is a portable command-line data file processor" \
+            --label "org.opencontainers.image.documentation=https://mikefarah.gitbook.io/yq/" \
+            --label "org.opencontainers.image.licenses=MIT" \
+            --label "org.opencontainers.image.revision=$(git rev-parse HEAD)" \
+            --label "org.opencontainers.image.source=https://github.com/mikefarah/yq" \
+            --label "org.opencontainers.image.title=yq" \
+            --label "org.opencontainers.image.url=https://mikefarah.gitbook.io/yq/" \
+            --label "org.opencontainers.image.version=${IMAGE_VERSION}" \
+            --platform "${PLATFORMS}" \
+            --pull \
+            --push \
+            -t "${IMAGE_NAME}:${IMAGE_VERSION}" \
+            -t "${IMAGE_NAME}:4" \
+            -t "${IMAGE_NAME}:latest" \
+            -t "ghcr.io/${IMAGE_NAME}:${IMAGE_VERSION}" \
+            -t "ghcr.io/${IMAGE_NAME}:4" \
+            -t "ghcr.io/${IMAGE_NAME}:latest" \
+            .
+
+          cd github-action
+          docker buildx build \
+            --label "org.opencontainers.image.authors=https://github.com/mikefarah/yq/graphs/contributors" \
+            --label "org.opencontainers.image.created=$(date --rfc-3339=seconds)" \
+            --label "org.opencontainers.image.description=yq is a portable command-line data file processor" \
+            --label "org.opencontainers.image.documentation=https://mikefarah.gitbook.io/yq/" \
+            --label "org.opencontainers.image.licenses=MIT" \
+            --label "org.opencontainers.image.revision=$(git rev-parse HEAD)" \
+            --label "org.opencontainers.image.source=https://github.com/mikefarah/yq" \
+            --label "org.opencontainers.image.title=yq" \
+            --label "org.opencontainers.image.url=https://mikefarah.gitbook.io/yq/" \
+            --label "org.opencontainers.image.version=${IMAGE_VERSION}" \
+            --platform "${PLATFORMS}" \
+            --pull \
+            --push \
+            -t "${IMAGE_NAME}:${IMAGE_VERSION}-githubaction" \
+            -t "${IMAGE_NAME}:4-githubaction" \
+            -t "${IMAGE_NAME}:latest-githubaction" \
+            -t "ghcr.io/${IMAGE_NAME}:${IMAGE_VERSION}-githubaction" \
+            -t "ghcr.io/${IMAGE_NAME}:4-githubaction" \
+            -t "ghcr.io/${IMAGE_NAME}:latest-githubaction" \
+            .

.github/workflows/go.yml

@@ -1,5 +1,8 @@
 name: Build
-on: [push]
+on: [push, pull_request]
+permissions:
+  contents: read
+
 jobs:
 
   build:
@@ -7,14 +10,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.15
-      uses: actions/setup-go@v1
+    - name: Set up Go
+      uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
       with:
-        go-version: 1.15
+        go-version: '^1.20'
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
     - name: Get dependencies
       run: |
@@ -24,8 +27,9 @@ jobs:
             dep ensure
         fi
 
-    - name: Download deps
+    - name: Check the build
+      shell: bash -l {0}
       run: |
         export PATH=${PATH}:`go env GOPATH`/bin
         scripts/devtools.sh
-        make local build
+        make local build

.github/workflows/release.yml

@@ -2,77 +2,63 @@ name: Release YQ
 on:
   push:
     tags:
-      - 'v*'
+      - 'v4.*'
+      - 'draft-*'
+
+permissions: {}
 
 jobs:
   publishGitRelease:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      id-token: write
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
-          go-version: '^1.15'
+          go-version: '^1.20'
+          check-latest: true
+      - name: Compile man page markup
+        id: gen-man-page-md
+        run: |
+          ./scripts/generate-man-page-md.sh
+
+      - name: Get the version
+        id: get_version
+        run: echo "VERSION=${GITHUB_REF##*/}" >> "${GITHUB_OUTPUT}"
+
+      - name: Generate man page
+        uses: docker://pandoc/core:2.14.2
+        id: gen-man-page
+        with:
+          args: >-
+            --standalone
+            --to man
+            --variable=title:"YQ"
+            --variable=section:"1"
+            --variable=header:"yq (https://github.com/mikefarah/yq/) version ${{ steps.get_version.outputs.VERSION }}"
+            --variable=author:"Mike Farah"
+            --output=yq.1
+            man.md
+
+      - name: Install cosign
+        uses: sigstore/cosign-installer@v3
+
       - name: Cross compile
         run: |
           sudo apt-get install rhash -y
-          go get github.com/mitchellh/gox
+          go install github.com/goreleaser/goreleaser/v2@latest
           ./scripts/xcompile.sh
 
-      - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1.0.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: ${{ github.ref }}
-          draft: true
-          prerelease: false
-
-      - uses: shogo82148/actions-upload-release-asset@v1
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: build/*
-
-  publishDocker:
-    environment: dockerhub
-    env:
-      IMAGE_NAME: mikefarah/yq
-    runs-on: ubuntu-latest
-    steps:
-      - name: Get latest release tag      
-        uses: oprypin/find-latest-tag@v1
-        with:
-          repository: mikefarah/yq  # The repository to scan.
-          releases-only: true  # We know that all relevant tags have a GitHub release for them.
-        id: yq  
-        
-      - name: Clone source code
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ steps.yq.outputs.tag }}
-      
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-        with:
-          platforms: all
-  
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v1
-        with:
-          version: latest
-
-      - name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }} && docker version
- 
-      - name: Build and push image
+      - name: Sign checksums
         run: |
-          IMAGE_VERSION="$(git describe --tags --abbrev=0)"
-          SHORT_SHA1=$(git rev-parse --short HEAD)
-          PLATFORMS="linux/amd64,linux/ppc64le,linux/arm64"
-          echo "Building and pushing version ${IMAGE_VERSION} of image ${IMAGE_NAME}"
-          echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
-          docker buildx build --platform "${PLATFORMS}" -t "${IMAGE_NAME}:${IMAGE_VERSION}"  -t "${IMAGE_NAME}:latest" -t "${IMAGE_NAME}:4" \
-            --push .
-    
+          cosign sign-blob --yes --output-bundle build/checksums.bundle build/checksums
+          cosign sign-blob --yes --output-bundle build/checksums-bsd.bundle build/checksums-bsd
+
+      - name: Release
+        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2.6.2
+        with:
+          files: build/*
+          draft: true
+          fail_on_unmatched_files: true

.github/workflows/scorecard.yml

@@ -0,0 +1,78 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '39 7 * * 2'
+  push:
+    branches: [ "master" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    # `publish_results: true` only works when run from the default branch. conditional can be removed if disabled.
+    if: github.event.repository.default_branch == github.ref_name || github.event_name == 'pull_request'
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      # Uncomment the permissions below if installing in a private repository.
+      # contents: read
+      # actions: read
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186 # v2.4.1
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecard on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action?tab=readme-ov-file#authentication-with-fine-grained-pat-optional.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+          # (Optional) Uncomment file_mode if you have a .gitattributes with files marked export-ignore
+          # file_mode: git
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard (optional).
+      # Commenting out will disable upload of results to your repo's Code Scanning dashboard
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: results.sarif

.github/workflows/snap-release.yml

@@ -0,0 +1,31 @@
+name: Release Snap
+
+on:
+  release:
+    types: [released]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+permissions: {}
+
+jobs:
+    buildSnap:
+      environment: snap
+      runs-on: ubuntu-latest
+      permissions:
+        contents: read
+      steps:
+        - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        - uses: snapcore/action-build@3bdaa03e1ba6bf59a65f84a751d943d549a54e79 # v1.3.0
+          id: build
+          env:
+            SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.STORE_LOGIN }}
+          with:
+            snapcraft-args: "remote-build --launchpad-accept-public-upload"
+        - uses: snapcore/action-publish@214b86e5ca036ead1668c79afb81e550e6c54d40 # v1.2.0
+          env:
+            SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.STORE_LOGIN }}
+          with:
+            snap: ${{ steps.build.outputs.snap }}
+            release: stable

.github/workflows/test-yq.yml

@@ -0,0 +1,28 @@
+name: Test Yq Action
+on: 
+  push:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Get test
+        id: get_value
+        uses: mikefarah/yq@master
+        with:
+          cmd: yq '.test' examples/multiline-text.yaml
+      - name: Multiline test
+        run: echo "### It was [${{ steps.get_value.outputs.result }}]" >> $GITHUB_STEP_SUMMARY
+      - name: Write inplace test
+        id: lookupSdkVersion
+        uses: mikefarah/yq@master
+        with:
+          cmd: yq -i '.b.c = 5' examples/sample.yaml

.gitignore

@@ -22,8 +22,10 @@ _cgo_gotypes.go
 _cgo_export.*
 
 _testmain.go
+cover.out
 coverage.out
 coverage.html
+coverage_sorted.txt
 *.exe
 *.test
 *.prof
@@ -38,3 +40,37 @@ parts/
 prime/
 .snapcraft/
 yq*.snap
+
+test.yml
+test*.yml
+test*.tf
+test*.xml
+test*.toml
+test*.yaml
+*.kyaml
+test_dir1/
+test_dir2/
+0.yml
+1.yml
+2.yml
+
+
+# man page
+man.md
+yq.1
+
+# debian pkg
+_build
+debian/files
+
+# intellij
+/.idea
+
+# vscode
+.vscode
+
+yq3
+
+# Golang
+.gomodcache/
+.gocache/

.golangci.bck.yml

@@ -0,0 +1,38 @@
+run:
+  timeout: 5m
+linters:
+  enable:
+    - asciicheck
+    - depguard
+    - errorlint
+    - gci
+    - gochecknoinits
+    - gofmt
+    - goimports
+    - gosec
+    - gosimple
+    - staticcheck
+    - unused
+    - misspell
+    - nakedret
+    - nolintlint
+    - predeclared
+    - revive
+    - unconvert
+    - unparam
+linters-settings:
+  depguard:
+    rules:
+      prevent_unmaintained_packages:
+        list-mode: lax
+        files:
+          - $all
+          - "!$test"
+        deny:
+          - pkg: io/ioutil
+            desc: "replaced by io and os packages since Go 1.16: https://tip.golang.org/doc/go1.16#ioutil"
+issues:
+  exclude-rules:
+  - linters:
+    - revive
+    text: "var-naming"

.golangci.yml

@@ -0,0 +1,57 @@
+version: "2"
+linters:
+  enable:
+    - asciicheck
+    - depguard
+    - errorlint
+    - gochecknoinits
+    - gosec
+    - misspell
+    - nakedret
+    - nolintlint
+    - predeclared
+    - revive
+    - unconvert
+    - unparam
+  settings:
+    misspell:
+      locale: UK
+      ignore-rules:
+        - color
+        - colors
+    depguard:
+      rules:
+        prevent_unmaintained_packages:
+          list-mode: lax
+          files:
+            - $all
+            - '!$test'
+          deny:
+            - pkg: io/ioutil
+              desc: 'replaced by io and os packages since Go 1.16: https://tip.golang.org/doc/go1.16#ioutil'
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - revive
+        text: var-naming
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gci
+    - gofmt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

.goreleaser.yaml

@@ -0,0 +1,48 @@
+version: 2
+
+dist: build
+
+builds:
+  - id: yq
+
+    binary: yq_{{ .Os }}_{{ .Arch }}
+
+    ldflags:
+      - -s -w
+
+    env:
+      - CGO_ENABLED=0
+
+    targets:
+      - darwin_amd64
+      - darwin_arm64
+      - freebsd_386
+      - freebsd_amd64
+      - freebsd_arm
+      - linux_386
+      - linux_amd64
+      - linux_arm
+      - linux_arm64
+      - linux_loong64
+      - linux_mips
+      - linux_mips64
+      - linux_mips64le
+      - linux_mipsle
+      - linux_ppc64
+      - linux_ppc64le
+      - linux_riscv64
+      - linux_s390x
+      - netbsd_386
+      - netbsd_amd64
+      - netbsd_arm
+      - openbsd_386
+      - openbsd_amd64
+      - windows_386
+      - windows_amd64
+      - windows_arm64
+
+    no_unique_dist_dir: true
+
+release:
+  disable: true
+  skip_upload: true

CODE_OF_CONDUCT.md

@@ -11,7 +11,7 @@ appearance, race, religion, or sexual identity and orientation.
 
 ## Our Standards
 
-Examples of behavior that contributes to creating a positive environment
+Examples of behaviour that contributes to creating a positive environment
 include:
 
 * Using welcoming and inclusive language
@@ -20,7 +20,7 @@ include:
 * Focusing on what is best for the community
 * Showing empathy towards other community members
 
-Examples of unacceptable behavior by participants include:
+Examples of unacceptable behaviour by participants include:
 
 * The use of sexualized language or imagery and unwelcome sexual attention or
  advances
@@ -34,13 +34,13 @@ Examples of unacceptable behavior by participants include:
 ## Our Responsibilities
 
 Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
+behaviour and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behaviour.
 
 Project maintainers have the right and responsibility to remove, edit, or
 reject comments, commits, code, wiki edits, issues, and other contributions
 that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
+permanently any contributor for other behaviours that they deem inappropriate,
 threatening, offensive, or harmful.
 
 ## Scope
@@ -54,7 +54,7 @@ further defined and clarified by project maintainers.
 
 ## Enforcement
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
+Instances of abusive, harassing, or otherwise unacceptable behaviour may be
 reported by contacting the project team at mikefarah@gmail.com. All
 complaints will be reviewed and investigated and will result in a response that
 is deemed necessary and appropriate to the circumstances. The project team is

CONTRIBUTING.md

@@ -1,8 +1,229 @@
-1. Install (golang)[https://golang.org/]
-1. Run  `scripts/devtools.sh` to install the required devtools
-2. Run `make [local] vendor` to install the vendor dependencies
-2. Run `make [local] test` to ensure you can run the existing tests
-3. Write unit tests - (see existing examples). Changes will not be accepted without corresponding unit tests.
-4. Make the code changes.
-5. `make [local] test` to lint code and run tests
-6. Profit! ok no profit, but raise a PR and get kudos :)
+# Before you begin 
+Not all new PRs will be merged in 
+
+It's recommended to check with the owner first (e.g. raise an issue) to discuss a new feature before developing, to ensure your hard efforts don't go to waste.
+
+PRs to fix bugs and issues are almost always welcome :pray: please ensure you write tests as well.
+
+The following types of PRs will _not_ be accepted:
+- **Significant refactors** take a lot of time to understand and can have all sorts of unintended side effects. If you think there's a better way to do things (that requires significant changes) raise an issue for discussion first :)
+- **Release pipeline PRs** are a security risk - it's too easy for a serious vulnerability to sneak in (either intended or not). If there is a new cool way of releasing things, raise an issue for discussion first - it will need to be gone over with a fine tooth comb.
+- **Version bumps** are handled by dependabot, the bot will auto-raise PRs and they will be regularly merged in. 
+- **New release platforms** At this stage, yq is not going to maintain any other release platforms other than GitHub and Docker - that said, I'm more than happy to put in other community maintained methods in the README for visibility :heart:
+
+
+# Development
+
+## Initial Setup
+
+1. Install [Golang](https://golang.org/) (version 1.24.0 or later)
+2. Run `scripts/devtools.sh` to install required development tools:
+   - golangci-lint for code linting
+   - gosec for security analysis
+3. Run `make [local] vendor` to install vendor dependencies
+4. Run `make [local] test` to ensure you can run the existing tests
+
+## Development Workflow
+
+1. **Write unit tests first** - Changes will not be accepted without corresponding unit tests (see Testing section below)
+2. **Make your code changes**
+3. **Run tests and linting**: `make [local] test` (this runs formatting, linting, security checks, and tests)
+4. **Create your PR** and get kudos! :)
+
+## Make Commands
+
+- Use `make [local] <command>` for local development (runs in Docker container)
+- Use `make <command>` for CI/CD environments
+- Common commands:
+  - `make [local] vendor` - Install dependencies
+  - `make [local] test` - Run all checks and tests
+  - `make [local] build` - Build the yq binary
+  - `make [local] format` - Format code
+  - `make [local] check` - Run linting and security checks
+
+# Code Quality
+
+## Linting and Formatting
+
+The project uses strict linting rules defined in `.golangci.yml`. All code must pass:
+
+- **Code formatting**: gofmt, goimports, gci
+- **Linting**: revive, errorlint, gosec, misspell, and others
+- **Security checks**: gosec security analysis
+- **Spelling checks**: misspell detection
+
+Run `make [local] check` to verify your code meets all quality standards.
+
+## Code Style Guidelines
+
+- Follow standard Go conventions
+- Use meaningful variable names
+- Add comments for public functions and complex logic
+- Keep functions focused and reasonably sized
+- Use the project's existing patterns and conventions
+
+# Testing
+
+## Test Structure
+
+Tests in yq use the `expressionScenario` pattern. Each test scenario includes:
+- `expression`: The yq expression to test
+- `document`: Input YAML/JSON (optional)
+- `expected`: Expected output
+- `skipDoc`: Whether to skip documentation generation
+
+## Writing Tests
+
+1. **Find the appropriate test file** (e.g., `operator_add_test.go` for addition operations)
+2. **Add your test scenario** to the `*OperatorScenarios` slice
+3. **Run the specific test**: `go test -run TestAddOperatorScenarios` (replace with appropriate test name)
+4. **Verify documentation generation** (see Documentation section)
+
+## Test Examples
+
+```go
+var addOperatorScenarios = []expressionScenario{
+    {
+        skipDoc:    true,
+        expression: `"foo" + "bar"`,
+        expected: []string{
+            "D0, P[], (!!str)::foobar\n",
+        },
+    },
+    {
+        document:   "apples: 3",
+        expression: `.apples + 3`,
+        expected: []string{
+            "D0, P[apples], (!!int)::6\n",
+        },
+    },
+}
+```
+
+## Running Tests
+
+- **All tests**: `make [local] test`
+- **Specific test**: `go test -run TestName`
+- **With coverage**: `make [local] cover`
+
+# Documentation
+
+## Documentation Generation
+
+The project uses a documentation system that combines static headers with dynamically generated content from tests.
+
+### How It Works
+
+1. **Static headers** are defined in `pkg/yqlib/doc/operators/headers/*.md`
+2. **Dynamic content** is generated from test scenarios in `*_test.go` files
+3. **Generated docs** are created in `pkg/yqlib/doc/*.md` by concatenating headers with test-generated content
+4. **Documentation is synced** to the gitbook branch for the website
+
+### Updating Operator Documentation
+
+#### For Test-Generated Documentation
+
+Most operator documentation is generated from tests. To update:
+
+1. **Find the test file** (e.g., `operator_add_test.go`)
+2. **Update test scenarios** - each `expressionScenario` with `skipDoc: false` becomes documentation
+3. **Run the test** to regenerate docs:
+   ```bash
+   cd pkg/yqlib
+   go test -run TestAddOperatorScenarios
+   ```
+4. **Verify the generated documentation** in `pkg/yqlib/doc/add.md`
+5. **Create a PR** with your changes
+
+#### For Header-Only Documentation
+
+If documentation exists only in `headers/*.md` files:
+1. **Update the header file directly** (e.g., `pkg/yqlib/doc/operators/headers/add.md`)
+2. **Create a PR** with your changes
+
+### Updating Static Documentation
+
+For documentation not in the master branch:
+
+1. **Check the gitbook branch** for additional pages
+2. **Update the `*.md` files** directly
+3. **Create a PR** to the gitbook branch
+
+### Documentation Best Practices
+
+- **Write clear, concise examples** in test scenarios
+- **Use meaningful variable names** in examples
+- **Include edge cases** and error conditions
+- **Test your documentation changes** by running the specific test
+- **Verify generated output** matches expectations
+
+Note: PRs with small changes (e.g. minor typos) may not be merged (see https://joel.net/how-one-guy-ruined-hacktoberfest2020-drama).
+
+# Troubleshooting
+
+## Common Setup Issues
+
+### Docker/Podman Issues
+- **Problem**: `make` commands fail with Docker errors
+- **Solution**: Ensure Docker or Podman is running and accessible
+- **Alternative**: Use `make local <command>` to run in containers
+
+### Go Version Issues
+- **Problem**: Build fails with Go version errors
+- **Solution**: Ensure you have Go 1.24.0 or later installed
+- **Check**: Run `go version` to verify
+
+### Vendor Dependencies
+- **Problem**: `make vendor` fails or dependencies are outdated
+- **Solution**: 
+  ```bash
+  go mod tidy
+  make [local] vendor
+  ```
+
+### Linting Failures
+- **Problem**: `make check` fails with linting errors
+- **Solution**: 
+  ```bash
+  make [local] format  # Auto-fix formatting
+  # Manually fix remaining linting issues
+  make [local] check   # Verify fixes
+  ```
+
+### Test Failures
+- **Problem**: Tests fail locally but pass in CI
+- **Solution**: 
+  ```bash
+  make [local] test    # Run in Docker container
+  ```
+
+- **Problem**: Tests fail with a VCS error:
+  ```bash
+  error obtaining VCS status: exit status 128
+  Use -buildvcs=false to disable VCS stamping.
+  ```
+- **Solution**:
+  Git security mechanisms prevent Golang from detecting the Git details inside
+  the container; either build with the `local` option, or pass GOFLAGS to
+  disable Golang buildvcs behaviour.
+  ```bash
+  make local test
+  # OR
+  make test GOFLAGS='-buildvcs=true'
+  ```
+
+### Documentation Generation Issues
+- **Problem**: Generated docs don't update after test changes
+- **Solution**: 
+  ```bash
+  cd pkg/yqlib
+  go test -run TestSpecificOperatorScenarios
+  # Check if generated file updated in pkg/yqlib/doc/
+  ```
+
+## Getting Help
+
+- **Check existing issues**: Search GitHub issues for similar problems
+- **Create an issue**: If you can't find a solution, create a detailed issue
+- **Ask questions**: Use GitHub Discussions for general questions
+- **Join the community**: Check the project's community channels

Dockerfile

@@ -1,25 +1,28 @@
-FROM golang:1.15 as builder
+FROM golang:1.26.2@sha256:2a2b4b5791cea8ae09caecba7bad0bd9631def96e5fe362e4a5e67009fe4ae61 AS builder
 
 WORKDIR /go/src/mikefarah/yq
 
-# cache devtools
-COPY ./scripts/devtools.sh /go/src/mikefarah/yq/scripts/devtools.sh
-RUN ./scripts/devtools.sh
+COPY . .
 
-COPY . /go/src/mikefarah/yq
-
-RUN CGO_ENABLED=0 make local build
+RUN CGO_ENABLED=0 go build -ldflags "-s -w" .
+# RUN ./scripts/test.sh -- this too often times out in the github pipeline.
+RUN ./scripts/acceptance.sh
 
 # Choose alpine as a base image to make this useful for CI, as many
 # CI tools expect an interactive shell inside the container
-FROM alpine:3.12.3 as production
+FROM alpine:3@sha256:25109184c71bdad752c8312a8623239686a9a2071e8825f20acb8f2198c3f659 AS production
+LABEL maintainer="Mike Farah <mikefarah@users.noreply.github.com>"
 
 COPY --from=builder /go/src/mikefarah/yq/yq /usr/bin/yq
-RUN chmod +x /usr/bin/yq
-
-ARG VERSION=none
-LABEL version=${VERSION}
 
 WORKDIR /workdir
 
+RUN set -eux; \
+  addgroup -g 1000 yq; \
+  adduser -u 1000 -G yq -s /bin/sh -h /home/yq -D yq
+
+RUN chown -R yq:yq /workdir
+
+USER yq
+
 ENTRYPOINT ["/usr/bin/yq"]

Dockerfile.dev

@@ -1,30 +1,15 @@
-FROM golang:1.15
+FROM golang:1.26.2@sha256:2a2b4b5791cea8ae09caecba7bad0bd9631def96e5fe362e4a5e67009fe4ae61
+
+RUN apt-get update && \
+    apt-get install -y npm && \
+    npm install -g npx cspell@latest
 
 COPY scripts/devtools.sh /opt/devtools.sh
 
-RUN set -e -x \
-    && /opt/devtools.sh
+RUN set -e -x && \
+    /opt/devtools.sh
 
-# install mkdocs
-RUN set -ex \
-    && buildDeps=' \
-        build-essential \
-        python3-dev \
-    ' \
-    && apt-get update && apt-get install -y --no-install-recommends \
-        $buildDeps \
-        python3 \
-        python3-setuptools \
-        python3-wheel \
-        python3-pip \
-    && pip3 install --upgrade \
-        pip \
-        'Markdown>=2.6.9' \
-        'mkdocs>=0.16.3' \
-        'mkdocs-material>=1.10.1' \
-        'markdown-include>=0.5.1' \
-    && apt-get purge -y --auto-remove $buildDeps \
-    && rm -rf /var/lib/apt/lists/*
+ENV PATH=/go/bin:$PATH
 
 ENV CGO_ENABLED 0
 ENV GOPATH /go:/yq

LICENSE

@@ -1,3 +1,5 @@
+The MIT License (MIT)
+
 Copyright (c) 2017 Mike Farah
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

Makefile

@@ -2,6 +2,7 @@ MAKEFLAGS += --warn-undefined-variables
 SHELL := /bin/bash
 .SHELLFLAGS := -o pipefail -euc
 .DEFAULT_GOAL := install
+ENGINE := $(shell { (podman version > /dev/null 2>&1 && command -v podman) || command -v docker; } 2>/dev/null)
 
 include Makefile.variables
 
@@ -17,6 +18,7 @@ help:
 	@echo '    make vendor          Install dependencies to vendor directory.'
 	@echo '    make format          Run code formatter.'
 	@echo '    make check           Run static code analysis (lint).'
+	@echo '    make secure          Run gosec.'
 	@echo '    make test            Run tests on project.'
 	@echo '    make cover           Run tests and capture code coverage metrics on project.'
 	@echo '    make clean           Clean the directory tree of produced artifacts.'
@@ -32,7 +34,8 @@ clean:
 
 ## prefix before other make targets to run in your local dev environment
 local: | quiet
-	@$(eval DOCKRUN= )
+	@$(eval ENGINERUN= )
+	@$(eval GOFLAGS="$(GOFLAGS)" )
 	@mkdir -p tmp
 	@touch tmp/dev_image_id
 quiet: # this is silly but shuts up 'Nothing to be done for `local`'
@@ -41,9 +44,9 @@ quiet: # this is silly but shuts up 'Nothing to be done for `local`'
 prepare: tmp/dev_image_id
 tmp/dev_image_id: Dockerfile.dev scripts/devtools.sh
 	@mkdir -p tmp
-	@docker rmi -f ${DEV_IMAGE} > /dev/null 2>&1 || true
-	@docker build -t ${DEV_IMAGE} -f Dockerfile.dev .
-	@docker inspect -f "{{ .ID }}" ${DEV_IMAGE} > tmp/dev_image_id
+	@${ENGINE} rmi -f ${DEV_IMAGE} > /dev/null 2>&1 || true
+	@${ENGINE} build -t ${DEV_IMAGE} -f Dockerfile.dev .
+	@${ENGINE} inspect -f "{{ .ID }}" ${DEV_IMAGE} > tmp/dev_image_id
 
 # ----------------------------------------------
 # build
@@ -53,58 +56,65 @@ build: build/dev
 .PHONY: build/dev
 build/dev: test *.go
 	@mkdir -p bin/
-	${DOCKRUN} go build --ldflags "$(LDFLAGS)"
-	${DOCKRUN} bash ./scripts/acceptance.sh
+	${ENGINERUN} go build --ldflags "$(LDFLAGS)"
+	${ENGINERUN} bash ./scripts/acceptance.sh
 
 ## Compile the project for multiple OS and Architectures.
 xcompile: check
 	@rm -rf build/
 	@mkdir -p build
-	${DOCKRUN} bash ./scripts/xcompile.sh
+	${ENGINERUN} bash ./scripts/xcompile.sh
 	@find build -type d -exec chmod 755 {} \; || :
 	@find build -type f -exec chmod 755 {} \; || :
 
 .PHONY: install
 install: build
-	${DOCKRUN} go install
+	${ENGINERUN} go install
 
 # Each of the fetch should be an entry within vendor.json; not currently included within project
 .PHONY: vendor
 vendor: tmp/dev_image_id
-	${DOCKRUN} go mod vendor
+	@mkdir -p vendor
+	${ENGINERUN} go mod vendor
 
 # ----------------------------------------------
 # develop and test
 
 .PHONY: format
 format: vendor
-	${DOCKRUN} bash ./scripts/format.sh
+	${ENGINERUN} bash ./scripts/format.sh
+
+
+.PHONY: spelling
+spelling: format
+	${ENGINERUN} bash ./scripts/spelling.sh
+
+.PHONY: secure
+secure: spelling
+	${ENGINERUN} bash ./scripts/secure.sh
 
 .PHONY: check
-check: format
-	${DOCKRUN} bash ./scripts/check.sh
+check: secure
+	${ENGINERUN} bash ./scripts/check.sh
+
+
 
 .PHONY: test
 test: check
-	${DOCKRUN} bash ./scripts/test.sh
+	${ENGINERUN} bash ./scripts/test.sh
 
 .PHONY: cover
 cover: check
 	@rm -rf cover/
 	@mkdir -p cover
-	${DOCKRUN} bash ./scripts/coverage.sh
+	${ENGINERUN} bash ./scripts/coverage.sh
 	@find cover -type d -exec chmod 755 {} \; || :
 	@find cover -type f -exec chmod 644 {} \; || :
 
-.PHONY: build-docs
-build-docs: prepare mkdocs.yml mkdocs/*
-	${DOCKRUN} mkdocs build
-	@find docs -type d -exec chmod 755 {} \; || :
-	@find docs -type f -exec chmod 644 {} \; || :
 
 .PHONY: release
 release: xcompile
-	${DOCKRUN} bash ./scripts/publish.sh
+	${ENGINERUN} bash ./scripts/publish.sh
 
 # ----------------------------------------------
 # utilities

Makefile.variables

@@ -4,9 +4,11 @@ IMPORT_PATH := github.com/mikefarah/${PROJECT}
 export GIT_COMMIT = $(shell git rev-parse --short HEAD)
 export GIT_DIRTY = $(shell test -n "$$(git status --porcelain)" && echo "+CHANGES" || true)
 export GIT_DESCRIBE = $(shell git describe --tags --always)
+GOFLAGS :=
 LDFLAGS :=
 LDFLAGS += -X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY}
 LDFLAGS += -X main.GitDescribe=${GIT_DESCRIBE}
+LDFLAGS += -w -s
 
 GITHUB_TOKEN ?=
 
@@ -25,14 +27,17 @@ ifeq ($(CYG_CHECK),1)
 else
 	# all non-windows environments
 	ROOT := $(shell pwd)
+	# Deliberately use `command -v` instead of `which` to be POSIX compliant
+	SELINUX := $(shell command -v getenforce >/dev/null 2>&1 && echo :z)
 endif
 
 DEV_IMAGE := ${PROJECT}_dev
 
-DOCKRUN := docker run --rm \
+ENGINERUN := ${ENGINE} run --rm \
 	-e LDFLAGS="${LDFLAGS}" \
+	-e GOFLAGS="${GOFLAGS}" \
 	-e GITHUB_TOKEN="${GITHUB_TOKEN}" \
-	-v ${ROOT}/vendor:/go/src \
-	-v ${ROOT}:/${PROJECT}/src/${IMPORT_PATH} \
+	-v ${ROOT}/vendor:/go/src${SELINUX} \
+	-v ${ROOT}:/${PROJECT}/src/${IMPORT_PATH}${SELINUX} \
 	-w /${PROJECT}/src/${IMPORT_PATH} \
 	${DEV_IMAGE}

README.md

@@ -1,28 +1,115 @@
 # yq
 
-![Build](https://github.com/mikefarah/yq/workflows/Build/badge.svg)  ![Docker Pulls](https://img.shields.io/docker/pulls/mikefarah/yq.svg) ![Github Releases (by Release)](https://img.shields.io/github/downloads/mikefarah/yq/total.svg) ![Go Report](https://goreportcard.com/badge/github.com/mikefarah/yq)
+![Build](https://github.com/mikefarah/yq/workflows/Build/badge.svg)  ![Docker Pulls](https://img.shields.io/docker/pulls/mikefarah/yq.svg) ![Github Releases (by Release)](https://img.shields.io/github/downloads/mikefarah/yq/total.svg) ![Go Report](https://goreportcard.com/badge/github.com/mikefarah/yq) ![CodeQL](https://github.com/mikefarah/yq/workflows/CodeQL/badge.svg)
 
 
-a lightweight and portable command-line YAML processor
+A lightweight and portable command-line YAML, JSON, INI and XML processor. `yq` uses [jq](https://github.com/stedolan/jq) (a popular JSON processor) like syntax but works with yaml files as well as json, kyaml, xml, ini, properties, csv and tsv. It doesn't yet support everything `jq` does - but it does support the most common operations and functions, and more is being added continuously.
 
-The aim of the project is to be the [jq](https://github.com/stedolan/jq) or sed of yaml files.
+yq is written in Go - so you can download a dependency free binary for your platform and you are good to go! If you prefer there are a variety of package managers that can be used as well as Docker and Podman, all listed below.
 
-## V4 released!
-V4 is now officially released, it's quite different from V3 (sorry for the migration), however it is much more similar to ```jq```, using a similar expression syntax and therefore support much more complex functionality! 
+## Quick Usage Guide
 
-If you've been using v3 and want/need to upgrade, checkout the [upgrade guide](https://mikefarah.gitbook.io/yq/v/v4.x/upgrading-from-v3).
+### Basic Operations
+
+**Read a value:**
+```bash
+yq '.a.b[0].c' file.yaml
+```
+
+**Pipe from STDIN:**
+```bash
+yq '.a.b[0].c' < file.yaml
+```
+
+**Update a yaml file in place:**
+```bash
+yq -i '.a.b[0].c = "cool"' file.yaml
+```
+
+**Update using environment variables:**
+```bash
+NAME=mike yq -i '.a.b[0].c = strenv(NAME)' file.yaml
+```
+
+### Advanced Operations
+
+**Merge multiple files:**
+```bash
+# merge two files
+yq -n 'load("file1.yaml") * load("file2.yaml")'
+
+# merge using globs (note: `ea` evaluates all files at once instead of in sequence)
+yq ea '. as $item ireduce ({}; . * $item )' path/to/*.yml
+```
+
+**Multiple updates to a yaml file:**
+```bash
+yq -i '
+  .a.b[0].c = "cool" |
+  .x.y.z = "foobar" |
+  .person.name = strenv(NAME)
+' file.yaml
+```
+
+**Find and update an item in an array:**
+```bash
+# Note: requires input file - add your file at the end
+yq -i '(.[] | select(.name == "foo") | .address) = "12 cat st"' data.yaml
+```
+
+**Convert between formats:**
+```bash
+# Convert JSON to YAML (pretty print)
+yq -Poy sample.json
+
+# Convert YAML to JSON
+yq -o json file.yaml
+
+# Convert XML to YAML
+yq -o yaml file.xml
+```
+
+See [recipes](https://mikefarah.gitbook.io/yq/recipes) for more examples and the [documentation](https://mikefarah.gitbook.io/yq/) for more information.
+
+Take a look at the discussions for [common questions](https://github.com/mikefarah/yq/discussions/categories/q-a), and [cool ideas](https://github.com/mikefarah/yq/discussions/categories/show-and-tell)
 
 ## Install
 
 ### [Download the latest binary](https://github.com/mikefarah/yq/releases/latest)
 
-### MacOS:
+### wget
+Use wget to download pre-compiled binaries. Choose your platform and architecture:
+
+**For Linux (example):**
+```bash
+# Set your platform variables (adjust as needed)
+VERSION=v4.2.0
+PLATFORM=linux_amd64
+
+# Download compressed binary
+wget https://github.com/mikefarah/yq/releases/download/${VERSION}/yq_${PLATFORM}.tar.gz -O - |\
+  tar xz && sudo mv yq_${PLATFORM} /usr/local/bin/yq
+
+# Or download plain binary
+wget https://github.com/mikefarah/yq/releases/download/${VERSION}/yq_${PLATFORM} -O /usr/local/bin/yq &&\
+    chmod +x /usr/local/bin/yq
+```
+
+**Latest version (Linux AMD64):**
+```bash
+wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/local/bin/yq &&\
+    chmod +x /usr/local/bin/yq
+```
+
+**Available platforms:** `linux_amd64`, `linux_arm64`, `linux_arm`, `linux_386`, `darwin_amd64`, `darwin_arm64`, `windows_amd64`, `windows_386`, etc.
+
+### MacOS / Linux via Homebrew:
 Using [Homebrew](https://brew.sh/)
 ```
 brew install yq
 ```
 
-### Ubuntu and other Linux distros supporting `snap` packages:
+### Linux via snap:
 ```
 snap install yq
 ```
@@ -31,43 +118,57 @@ snap install yq
 `yq` installs with [_strict confinement_](https://docs.snapcraft.io/snap-confinement/6233) in snap, this means it doesn't have direct access to root files. To read root files you can:
 
 ```
-sudo cat /etc/myfile | yq e '.a.path' - 
+sudo cat /etc/myfile | yq '.a.path'
 ```
 
 And to write to a root file you can either use [sponge](https://linux.die.net/man/1/sponge):
 ```
-sudo cat /etc/myfile | yq e '.a.path = "value"' - | sudo sponge /etc/myfile
+sudo cat /etc/myfile | yq '.a.path = "value"' | sudo sponge /etc/myfile
 ```
 or write to a temporary file:
 ```
-sudo cat /etc/myfile | yq e '.a.path = "value"' | sudo tee /etc/myfile.tmp
+sudo cat /etc/myfile | yq '.a.path = "value"' | sudo tee /etc/myfile.tmp
 sudo mv /etc/myfile.tmp /etc/myfile
 rm /etc/myfile.tmp
 ```
 
-### wget
-
-Use wget to download the pre-compiled binaries:
+### Run with Docker or Podman
 
+#### One-time use:
 ```bash
-wget https://github.com/mikefarah/yq/releases/download/${VERSION}/${BINARY} -O /usr/bin/yq &&\
-    chmod +x /usr/bin/yq
+# Docker - process files in current directory
+docker run --rm -v "${PWD}":/workdir mikefarah/yq '.a.b[0].c' file.yaml
+
+# Podman - same usage as Docker
+podman run --rm -v "${PWD}":/workdir mikefarah/yq '.a.b[0].c' file.yaml
 ```
 
-For instance, VERSION=4.0.0 and BINARY=yq_linux_amd64
+**Security note:** You can run `yq` in Docker with restricted privileges:
+```bash
+docker run --rm --security-opt=no-new-privileges --cap-drop all --network none \
+  -v "${PWD}":/workdir mikefarah/yq '.a.b[0].c' file.yaml
+```
 
-### Run with Docker
+#### Pipe data via STDIN:
 
-#### Oneshot use:
+You'll need to pass the `-i --interactive` flag to Docker/Podman:
 
 ```bash
-docker run --rm -v "${PWD}":/workdir mikefarah/yq <command> [flags] [expression ]FILE...
+# Process piped data
+docker run -i --rm mikefarah/yq '.this.thing' < myfile.yml
+
+# Same with Podman
+podman run -i --rm mikefarah/yq '.this.thing' < myfile.yml
 ```
 
 #### Run commands interactively:
 
 ```bash
-docker run --rm -it -v "${PWD}":/workdir mikefarah/yq sh
+docker run --rm -it -v "${PWD}":/workdir --entrypoint sh mikefarah/yq
+```
+
+```bash
+podman run --rm -it -v "${PWD}":/workdir --entrypoint sh mikefarah/yq
 ```
 
 It can be useful to have a bash function to avoid typing the whole docker command:
@@ -78,22 +179,135 @@ yq() {
 }
 ```
 
-### Go Get:
+```bash
+yq() {
+  podman run --rm -i -v "${PWD}":/workdir mikefarah/yq "$@"
+}
 ```
-GO111MODULE=on go get github.com/mikefarah/yq
+#### Running as root:
+
+`yq`'s container image no longer runs under root (https://github.com/mikefarah/yq/pull/860). If you'd like to install more things in the container image, or you're having permissions issues when attempting to read/write files you'll need to either:
+
+
+```
+docker run --user="root" -it --entrypoint sh mikefarah/yq
+```
+
+```
+podman run --user="root" -it --entrypoint sh mikefarah/yq
+```
+
+Or, in your Dockerfile:
+
+```
+FROM mikefarah/yq
+
+USER root
+RUN apk add --no-cache bash
+USER yq
+```
+
+#### Missing timezone data
+By default, the alpine image yq uses does not include timezone data. If you'd like to use the `tz` operator, you'll need to include this data:
+
+```
+FROM mikefarah/yq
+
+USER root
+RUN apk add --no-cache tzdata
+USER yq
+```
+
+#### Podman with SELinux
+
+If you are using podman with SELinux, you will need to set the shared volume flag `:z` on the volume mount:
+
+```
+-v "${PWD}":/workdir:z
+```
+
+### GitHub Action
+```
+  - name: Set foobar to cool
+    uses: mikefarah/yq@master
+    with:
+      cmd: yq -i '.foo.bar = "cool"' 'config.yml'
+  - name: Get an entry with a variable that might contain dots or spaces
+    id: get_username
+    uses: mikefarah/yq@master
+    with:
+      cmd: yq '.all.children.["${{ matrix.ip_address }}"].username' ops/inventories/production.yml
+  - name: Reuse a variable obtained in another step
+    run: echo ${{ steps.get_username.outputs.result }}
+```
+
+See https://mikefarah.gitbook.io/yq/usage/github-action for more.
+
+### Go Install:
+```
+go install github.com/mikefarah/yq/v4@latest
 ```
 
 ## Community Supported Installation methods
 As these are supported by the community :heart: - however, they may be out of date with the officially supported releases.
 
+_Please note that the Debian package (previously supported by @rmescandon) is no longer maintained. Please use an alternative installation method._
+
+
+### X-CMD
+Checkout `yq` on x-cmd: https://x-cmd.com/mod/yq
+
+- Instant Results: See the output of your yq filter in real-time.
+- Error Handling: Encounter a syntax error? It will display the error message and the results of the closest valid filter
+
+Thanks @edwinjhlee!
+
+### Nix
+
+```
+nix profile install nixpkgs#yq-go
+```
+
+See [here](https://search.nixos.org/packages?channel=unstable&show=yq-go&from=0&size=50&sort=relevance&type=packages&query=yq-go)
+
+
+### Webi
+
+```
+webi yq
+```
+
+See [webi](https://webinstall.dev/)
+Supported by @adithyasunil26 (https://github.com/webinstall/webi-installers/tree/master/yq)
+
+### Arch Linux
+
+```
+pacman -S go-yq
+```
 
 ### Windows:
+
+Using [Chocolatey](https://chocolatey.org)
+
+[![Chocolatey](https://img.shields.io/chocolatey/v/yq.svg)](https://chocolatey.org/packages/yq)
+[![Chocolatey](https://img.shields.io/chocolatey/dt/yq.svg)](https://chocolatey.org/packages/yq)
 ```
 choco install yq
 ```
 Supported by @chillum (https://chocolatey.org/packages/yq)
 
-### Mac:
+Using [scoop](https://scoop.sh/)
+```
+scoop install main/yq
+```
+
+Using [winget](https://learn.microsoft.com/en-us/windows/package-manager/)
+```
+winget install --id MikeFarah.yq
+```
+
+### MacPorts:
 Using [MacPorts](https://www.macports.org/)
 ```
 sudo port selfupdate
@@ -102,37 +316,60 @@ sudo port install yq
 Supported by @herbygillot (https://ports.macports.org/maintainer/github/herbygillot)
 
 ### Alpine Linux
-- Enable edge/community repo by adding ```$MIRROR/alpine/edge/community``` to ```/etc/apk/repositories```
-- Update database index with ```apk update```
-- Install yq with ```apk add yq```
 
-Supported by Tuan Hoang
-https://pkgs.alpinelinux.org/package/edge/community/x86/yq
+Alpine Linux v3.20+ (and Edge):
+```
+apk add yq-go
+```
 
+Alpine Linux up to v3.19:
+```
+apk add yq
+```
 
-### On Ubuntu 16.04 or higher from Debian package:
-```sh
-sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CC86BB64
-sudo add-apt-repository ppa:rmescandon/yq
-sudo apt update
-sudo apt install yq -y
+Supported by Tuan Hoang (https://pkgs.alpinelinux.org/packages?name=yq-go)
+
+### Flox:
+
+Flox can be used to install yq on Linux, MacOS, and Windows through WSL.
+
+```
+flox install yq
+```
+
+
+### MacOS / Linux via gah:
+Using [gah](https://github.com/marverix/gah)
+
+```
+gah install yq
 ```
-Supported by @rmescandon (https://launchpad.net/~rmescandon/+archive/ubuntu/yq)
 
 ## Features
+- [Detailed documentation with many examples](https://mikefarah.gitbook.io/yq/)
 - Written in portable go, so you can download a lovely dependency free binary
-- Uses similar syntax as `jq` but works with YAML and JSON files
+- Uses similar syntax as `jq` but works with YAML, INI, [JSON](https://mikefarah.gitbook.io/yq/usage/convert) and [XML](https://mikefarah.gitbook.io/yq/usage/xml) files
 - Fully supports multi document yaml files
+- Supports yaml [front matter](https://mikefarah.gitbook.io/yq/usage/front-matter) blocks (e.g. jekyll/assemble)
 - Colorized yaml output
-- [Deeply traverse yaml](https://mikefarah.gitbook.io/yq/v/v4.x/traverse)
-- [Sort yaml by keys](https://mikefarah.gitbook.io/yq/v/v4.x/sort-keys)
-- Manipulate yaml [comments](https://mikefarah.gitbook.io/yq/comment-operators), [styling](https://mikefarah.gitbook.io/yq/style), [tags](https://mikefarah.gitbook.io/yq/tag) and [anchors and aliases](https://mikefarah.gitbook.io/yq/anchor-and-alias-operators).
-- [Update yaml inplace](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate#flags)
-- [Complex expressions to select and update](https://mikefarah.gitbook.io/yq/v/v4.x/select#select-and-update-matching-values-in-map)
+- [Date/Time manipulation and formatting with TZ](https://mikefarah.gitbook.io/yq/operators/datetime)
+- [Deep data structures](https://mikefarah.gitbook.io/yq/operators/traverse-read)
+- [Sort keys](https://mikefarah.gitbook.io/yq/operators/sort-keys)
+- Manipulate yaml [comments](https://mikefarah.gitbook.io/yq/operators/comment-operators), [styling](https://mikefarah.gitbook.io/yq/operators/style), [tags](https://mikefarah.gitbook.io/yq/operators/tag) and [anchors and aliases](https://mikefarah.gitbook.io/yq/operators/anchor-and-alias-operators).
+- [Update in place](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate#flags)
+- [Complex expressions to select and update](https://mikefarah.gitbook.io/yq/operators/select#select-and-update-matching-values-in-map)
 - Keeps yaml formatting and comments when updating (though there are issues with whitespace)
-- [Convert to/from json to yaml](https://mikefarah.gitbook.io/yq/v/v4.x/usage/convert)
-- [Pipe data in by using '-'](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate)
+- [Decode/Encode base64 data](https://mikefarah.gitbook.io/yq/operators/encode-decode)
+- [Load content from other files](https://mikefarah.gitbook.io/yq/operators/load)
+- [Convert to/from json/ndjson](https://mikefarah.gitbook.io/yq/v/v4.x/usage/convert)
+- [Convert to/from xml](https://mikefarah.gitbook.io/yq/v/v4.x/usage/xml)
+- [Convert to/from hcl (terraform)](https://mikefarah.gitbook.io/yq/v/v4.x/usage/hcl)
+- [Convert to/from toml](https://mikefarah.gitbook.io/yq/v/v4.x/usage/toml)
+- [Convert to/from properties](https://mikefarah.gitbook.io/yq/v/v4.x/usage/properties)
+- [Convert to/from csv/tsv](https://mikefarah.gitbook.io/yq/usage/csv-tsv)
 - [General shell completion scripts (bash/zsh/fish/powershell)](https://mikefarah.gitbook.io/yq/v/v4.x/commands/shell-completion)
+- [Reduce](https://mikefarah.gitbook.io/yq/operators/reduce) to merge multiple files or sum an array or other fancy things.
+- [Github Action](https://mikefarah.gitbook.io/yq/usage/github-action) to use in your automated pipeline (thanks @devorbitus)
 
 ## [Usage](https://mikefarah.gitbook.io/yq/)
 
@@ -143,33 +380,101 @@ Usage:
   yq [flags]
   yq [command]
 
+Examples:
+
+# yq tries to auto-detect the file format based off the extension, and defaults to YAML if it's unknown (or piping through STDIN)
+# Use the '-p/--input-format' flag to specify a format type.
+cat file.xml | yq -p xml
+
+# read the "stuff" node from "myfile.yml"
+yq '.stuff' < myfile.yml
+
+# update myfile.yml in place
+yq -i '.stuff = "foo"' myfile.yml
+
+# print contents of sample.json as idiomatic YAML
+yq -P -oy sample.json
+
+
 Available Commands:
-  eval             Apply expression to each document in each yaml file given in sequence
-  eval-all         Loads _all_ yaml documents of _all_ yaml files and runs expression once
-  help             Help about any command
-  shell-completion Generate completion script
+  completion  Generate the autocompletion script for the specified shell
+  eval        (default) Apply the expression to each document in each yaml file in sequence
+  eval-all    Loads _all_ yaml documents of _all_ yaml files and runs expression once
+  help        Help about any command
 
 Flags:
-  -C, --colors        force print with colors
-  -e, --exit-status   set exit status if there are no matches or null or false is returned
-  -h, --help          help for yq
-  -I, --indent int    sets indent level for output (default 2)
-  -i, --inplace       update the yaml file inplace of first yaml file given.
-  -M, --no-colors     force print with no colors
-  -N, --no-doc        Don't print document separators (---)
-  -n, --null-input    Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.
-  -j, --tojson        output as json. Set indent to 0 to print json in one line.
-  -v, --verbose       verbose mode
-  -V, --version       Print version information and quit
+  -C, --colors                          force print with colors
+      --csv-auto-parse                  parse CSV YAML/JSON values (default true)
+      --csv-separator char              CSV Separator character (default ,)
+      --debug-node-info                 debug node info
+  -e, --exit-status                     set exit status if there are no matches or null or false is returned
+      --expression string               forcibly set the expression argument. Useful when yq argument detection thinks your expression is a file.
+      --from-file string                Load expression from specified file.
+  -f, --front-matter string             (extract|process) first input as yaml front-matter. Extract will pull out the yaml content, process will run the expression against the yaml content, leaving the remaining data intact
+      --header-preprocess               Slurp any header comments and separators before processing expression. (default true)
+  -h, --help                            help for yq
+  -I, --indent int                      sets indent level for output (default 2)
+  -i, --inplace                         update the file in place of first file given.
+  -p, --input-format string             [auto|a|yaml|y|json|j|kyaml|ky|props|p|csv|c|tsv|t|xml|x|base64|uri|toml|hcl|h|lua|l|ini|i] parse format for input. (default "auto")
+      --lua-globals                     output keys as top-level global variables
+      --lua-prefix string               prefix (default "return ")
+      --lua-suffix string               suffix (default ";\n")
+      --lua-unquoted                    output unquoted string keys (e.g. {foo="bar"})
+  -M, --no-colors                       force print with no colors
+  -N, --no-doc                          Don't print document separators (---)
+  -0, --nul-output                      Use NUL char to separate values. If unwrap scalar is also set, fail if unwrapped scalar contains NUL char.
+  -n, --null-input                      Don't read input, simply evaluate the expression given. Useful for creating docs from scratch.
+  -o, --output-format string            [auto|a|yaml|y|json|j|kyaml|ky|props|p|csv|c|tsv|t|xml|x|base64|uri|toml|hcl|h|shell|s|lua|l|ini|i] output format type. (default "auto")
+  -P, --prettyPrint                     pretty print, shorthand for '... style = ""'
+      --properties-array-brackets       use [x] in array paths (e.g. for SpringBoot)
+      --properties-separator string     separator to use between keys and values (default " = ")
+      --security-disable-env-ops        Disable env related operations.
+      --security-disable-file-ops       Disable file related operations (e.g. load)
+      --shell-key-separator string      separator for shell variable key paths (default "_")
+  -s, --split-exp string                print each result (or doc) into a file named (exp). [exp] argument must return a string. You can use $index in the expression as the result counter. The necessary directories will be created.
+      --split-exp-file string           Use a file to specify the split-exp expression.
+      --string-interpolation            Toggles strings interpolation of \(exp) (default true)
+      --tsv-auto-parse                  parse TSV YAML/JSON values (default true)
+  -r, --unwrapScalar                    unwrap scalar, print the value with no quotes, colors or comments. Defaults to true for yaml (default true)
+  -v, --verbose                         verbose mode
+  -V, --version                         Print version information and quit
+      --xml-attribute-prefix string     prefix for xml attributes (default "+@")
+      --xml-content-name string         name for xml content (if no attribute name is present). (default "+content")
+      --xml-directive-name string       name for xml directives (e.g. <!DOCTYPE thing cat>) (default "+directive")
+      --xml-keep-namespace              enables keeping namespace after parsing attributes (default true)
+      --xml-proc-inst-prefix string     prefix for xml processing instructions (e.g. <?xml version="1"?>) (default "+p_")
+      --xml-raw-token                   enables using RawToken method instead Token. Commonly disables namespace translations. See https://pkg.go.dev/encoding/xml#Decoder.RawToken for details. (default true)
+      --xml-skip-directives             skip over directives (e.g. <!DOCTYPE thing cat>)
+      --xml-skip-proc-inst              skip over process instructions (e.g. <?xml version="1"?>)
+      --xml-strict-mode                 enables strict parsing of XML. See https://pkg.go.dev/encoding/xml for more details.
+      --yaml-fix-merge-anchor-to-spec   Fix merge anchor to match YAML spec. Will default to true in late 2025
 
 Use "yq [command] --help" for more information about a command.
 ```
 
-Simple Example:
+## Troubleshooting
 
-```bash
-yq e '.a.b | length' f1.yml f2.yml 
+### Common Issues
+
+**PowerShell quoting issues:**
+```powershell
+# Use single quotes for expressions
+yq '.a.b[0].c' file.yaml
+
+# Or escape double quotes
+yq ".a.b[0].c = \"value\"" file.yaml
 ```
 
+### Getting Help
+
+- **Check existing issues**: [GitHub Issues](https://github.com/mikefarah/yq/issues)
+- **Ask questions**: [GitHub Discussions](https://github.com/mikefarah/yq/discussions)
+- **Documentation**: [Complete documentation](https://mikefarah.gitbook.io/yq/)
+- **Examples**: [Recipes and examples](https://mikefarah.gitbook.io/yq/recipes)
+
 ## Known Issues / Missing Features
 - `yq` attempts to preserve comment positions and whitespace as much as possible, but it does not handle all scenarios (see https://github.com/go-yaml/yaml/tree/v3 for details)
+- Powershell has its own...[opinions on quoting yq](https://mikefarah.gitbook.io/yq/usage/tips-and-tricks#quotes-in-windows-powershell)
+- "yes", "no" were dropped as boolean values in the yaml 1.2 standard - which is the standard yq assumes.
+
+See [tips and tricks](https://mikefarah.gitbook.io/yq/usage/tips-and-tricks) for more common problems and solutions.

SECURITY.md

@@ -0,0 +1,26 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+Please **do not** report security vulnerabilities through public GitHub issues.
+
+Instead, use GitHub's private vulnerability reporting feature:
+👉 https://github.com/mikefarah/yq/security
+
+This allows vulnerabilities to be triaged and addressed confidentially before any public disclosure.
+
+## Scope
+
+### HTTP / TLS / Network vulnerabilities
+
+yq is a command-line YAML/JSON/TOML processor that reads from files or standard input and writes to standard output. **yq does not include any HTTP or network libraries** and makes no network connections at runtime. CVEs related to HTTP, TLS, or networking are therefore **not applicable** to yq.
+
+### Dependency version bumps
+
+yq uses [Dependabot](https://docs.github.com/en/code-security/dependabot) to automatically raise pull requests for:
+
+- Go module dependencies
+- Go toolchain version
+- Docker base images
+
+Please **do not** raise pull requests or issues solely to bump dependency or Go versions — Dependabot handles this automatically and the maintainers merge those PRs regularly.

acceptance_tests/bad_args.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+testWriteInPlacePipeIn() {
+  result=$(./yq e -i -n '.a' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: write in place flag only applicable when giving an expression and at least one file" "$result"
+}
+
+testWriteInPlacePipeInEvalall() {
+  result=$(./yq ea -i -n '.a' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: write in place flag only applicable when giving an expression and at least one file" "$result"
+}
+
+testWriteInPlaceWithSplit() {
+  result=$(./yq e -s "cat" -i '.a = "thing"' test.yml 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: write in place cannot be used with split file" "$result"
+}
+
+testWriteInPlaceWithSplitEvalAll() {
+  result=$(./yq ea -s "cat" -i '.a = "thing"' test.yml 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: write in place cannot be used with split file" "$result"
+}
+
+testNullWithFiles() {
+  result=$(./yq e -n '.a = "thing"' test.yml 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: cannot pass files in when using null-input flag" "$result"
+}
+
+testNullWithFilesEvalAll() {
+  result=$(./yq ea -n '.a = "thing"' test.yml 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: cannot pass files in when using null-input flag" "$result"
+}
+
+
+
+source ./scripts/shunit2

acceptance_tests/basic.sh

@@ -0,0 +1,373 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml 2>/dev/null || true
+  rm .xyz 2>/dev/null || true
+  rm instructions.txt 2>/dev/null || true
+}
+
+testBasicEvalRoundTrip() {
+  ./yq -n ".a = 123" > test.yml
+  X=$(./yq '.a' test.yml)
+  assertEquals 123 "$X"
+}
+
+testBasicTrailingContent() {
+  cat >test-trailing.yml <<EOL
+test:
+# this comment will be removed
+EOL
+
+  read -r -d '' expected << EOM
+test:
+# this comment will be removed
+EOM
+  X=$(./yq test-trailing.yml -P)
+  assertEquals "$expected" "$X"
+}
+
+testBasicTrailingContent() {
+  cat >test-trailing.yml <<EOL
+test:
+# this comment will be removed
+EOL
+
+  read -r -d '' expected << EOM
+test:
+# hi
+EOM
+  X=$(./yq '. footComment = "hi"' test-trailing.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicTrailingContentEvalAll() {
+  cat >test-trailing.yml <<EOL
+test:
+# this comment will be removed
+EOL
+
+  read -r -d '' expected << EOM
+test:
+# this comment will be removed
+EOM
+  X=$(./yq ea test-trailing.yml -P)
+  assertEquals "$expected" "$X"
+}
+
+testBasicTrailingContentEvalAll() {
+  cat >test-trailing.yml <<EOL
+test:
+# this comment will be removed
+EOL
+
+  read -r -d '' expected << EOM
+test:
+# hi
+EOM
+  X=$(./yq ea '. footComment = "hi"' test-trailing.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicPipeWithDot() {
+  ./yq -n ".a = 123" > test.yml
+  X=$(cat test.yml | ./yq '.')
+  assertEquals "a: 123" "$X"
+}
+
+testBasicExpressionMatchesFileName() {
+  ./yq -n ".xyz = 123" > test.yml
+  touch .xyz
+  
+  X=$(./yq --expression '.xyz' test.yml)
+  assertEquals "123" "$X"
+
+  X=$(./yq ea --expression '.xyz' test.yml)
+  assertEquals "123" "$X"
+}
+
+testBasicExpressionFromFile() {
+  ./yq -n ".xyz = 123" > test.yml
+  echo '.xyz = "meow" | .cool = "frog"' > instructions.txt
+  
+  X=$(./yq --from-file instructions.txt test.yml -o=j -I=0)
+  assertEquals '{"xyz":"meow","cool":"frog"}' "$X"
+
+  X=$(./yq ea --from-file instructions.txt test.yml -o=j -I=0)
+  assertEquals '{"xyz":"meow","cool":"frog"}' "$X"
+}
+
+testBasicExpressionFromFileDos() {
+  ./yq -n ".xyz = 123" > test.yml
+  echo '.xyz = "meow" | .cool = "frog"' | sed 's/$'"/`echo \\\r`/" > instructions.txt
+  
+  X=$(./yq --from-file instructions.txt test.yml -o=j -I=0)
+  assertEquals '{"xyz":"meow","cool":"frog"}' "$X"
+
+  X=$(./yq ea --from-file instructions.txt test.yml -o=j -I=0)
+  assertEquals '{"xyz":"meow","cool":"frog"}' "$X"
+}
+
+testBasicGitHubAction() {
+  ./yq -n ".a = 123" > test.yml
+  X=$(cat /dev/null | ./yq test.yml)
+  assertEquals "a: 123" "$X"
+
+  X=$(cat /dev/null | ./yq e test.yml)
+  assertEquals "a: 123" "$X"
+
+  X=$(cat /dev/null | ./yq ea test.yml)
+  assertEquals "a: 123" "$X"
+}
+
+testBasicGitHubActionWithExpression() {
+  ./yq -n ".a = 123" > test.yml
+  X=$(cat /dev/null | ./yq '.a' test.yml)
+  assertEquals "123" "$X"
+
+  X=$(cat /dev/null | ./yq e '.a' test.yml)
+  assertEquals "123" "$X"
+
+  X=$(cat /dev/null | ./yq ea '.a' test.yml)
+  assertEquals "123" "$X"
+}
+
+
+testBasicEvalAllAllFiles() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(./yq ea test.yml test2.yml)
+  Y=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+# when given a file, don't read STDIN
+# otherwise strange things start happening
+# in scripts
+# https://github.com/mikefarah/yq/issues/1115
+
+testBasicCatWithFilesNoDash() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq test2.yml)
+  Y=$(./yq e '.' test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+# when the nullinput flag is used
+# don't automatically read STDIN (this breaks github actions)
+testBasicCreateFileGithubAction() {
+  cat /dev/null | ./yq -n ".a = 123" > test.yml
+}
+
+testBasicEvalAllCatWithFilesNoDash() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq ea test2.yml)
+  Y=$(./yq e '.' test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicCatWithFilesNoDashWithExp() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq '.a' test2.yml)
+  Y=$(./yq e '.a' test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicEvalAllCatWithFilesNoDashWithExp() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq ea '.a' test2.yml)
+  Y=$(./yq e '.a' test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+
+testBasicStdInWithFiles() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq - test2.yml)
+  Y=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicEvalAllStdInWithFiles() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq ea - test2.yml)
+  Y=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicStdInWithFilesReverse() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq test2.yml -)
+  Y=$(./yq e '.' test2.yml test.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicEvalAllStdInWithFilesReverse() {
+  ./yq -n ".a = 123" > test.yml
+  ./yq -n ".a = 124" > test2.yml
+  X=$(cat test.yml | ./yq ea test2.yml -)
+  Y=$(./yq e '.' test2.yml test.yml)
+  assertEquals "$Y" "$X"
+}
+
+testBasicEvalRoundTripNoEval() {
+  ./yq -n ".a = 123" > test.yml
+  X=$(./yq '.a' test.yml)
+  assertEquals 123 "$X"
+}
+
+testBasicStdInWithOneArg() {
+  ./yq e -n ".a = 123" > test.yml
+  X=$(cat test.yml | ./yq e ".a")
+  assertEquals 123 "$X"
+
+  X=$(cat test.yml | ./yq ea ".a")
+  assertEquals 123 "$X"
+
+  X=$(cat test.yml | ./yq ".a")
+  assertEquals 123 "$X"
+}
+
+testBasicUpdateInPlaceSequence() {
+  cat >test.yml <<EOL
+a: 0
+EOL
+  ./yq e -i ".a = 10" test.yml
+  X=$(./yq e '.a' test.yml)
+  assertEquals "10" "$X"
+}
+
+testBasicUpdateInPlaceSequenceNoEval() {
+  cat >test.yml <<EOL
+a: 0
+EOL
+  ./yq -i ".a = 10" test.yml
+  X=$(./yq '.a' test.yml)
+  assertEquals "10" "$X"
+}
+
+testBasicUpdateInPlaceSequenceEvalAll() {
+  cat >test.yml <<EOL
+a: 0
+EOL
+  ./yq ea -i ".a = 10" test.yml
+  X=$(./yq e '.a' test.yml)
+  assertEquals "10" "$X"
+}
+
+testBasicUpdateInPlaceMultipleFilesNoExpressionEval() {
+  cat >test.yml <<EOL
+a: 0
+EOL
+  cat >test2.yml <<EOL
+a: 1
+EOL
+read -r -d '' expected << EOM
+0
+---
+1
+EOM
+  ./yq -i test.yml test2.yml
+  X=$(./yq e '.a' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicUpdateInPlaceMultipleFilesNoExpressionEvalAll() {
+  cat >test.yml <<EOL
+a: 0
+EOL
+  cat >test2.yml <<EOL
+a: 1
+EOL
+read -r -d '' expected << EOM
+0
+---
+1
+EOM
+  ./yq -i ea test.yml test2.yml
+  X=$(./yq e '.a' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicNoExitStatus() {
+  echo "a: cat" > test.yml
+  X=$(./yq e '.z' test.yml)
+  assertEquals "null" "$X"
+}
+
+testBasicExitStatus() {
+  echo "a: cat" > test.yml
+  X=$(./yq e -e '.z' test.yml 2&>/dev/null)
+  assertEquals 1 "$?"
+}
+
+testBasicExitStatusNoEval() {
+  echo "a: cat" > test.yml
+  X=$(./yq -e '.z' test.yml 2&>/dev/null)
+  assertEquals 1 "$?"
+}
+
+testBasicExtractFieldWithSeparator() {
+    cat >test.yml <<EOL
+---
+name: chart-name
+version: 1.2.3
+EOL
+  X=$(./yq e '.name' test.yml)
+  assertEquals "chart-name" "$X"
+}
+
+testBasicExtractMultipleFieldWithSeparator() {
+    cat >test.yml <<EOL
+---
+name: chart-name
+version: 1.2.3
+---
+name: thing
+version: 1.2.3
+EOL
+
+read -r -d '' expected << EOM
+chart-name
+---
+thing
+EOM
+  X=$(./yq e '.name' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicMultiplyAssignMultiDoc() {
+      cat >test.yml <<EOL
+a: 1
+---
+b: 2
+EOL
+
+read -r -d '' expected << EOM
+a: 1
+c: 3
+---
+b: 2
+c: 3
+EOM
+
+
+  X=$(./yq '. *= {"c":3}' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testBasicClosedStdIn() {
+  cat >test.yml <<EOL
+a: 1
+EOL
+  X=$(./yq e '.a' test.yml <&-)
+  assertEquals "1" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/completion.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+testCompletionRuns() {
+    result=$(./yq __complete "" 2>&1)
+    assertEquals 0 $?
+    assertContains "$result" "Completion ended with directive:"
+}
+
+source ./scripts/shunit2

acceptance_tests/empty.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  cat >test.yml <<EOL
+# comment
+EOL
+}
+
+testEmptyEval() {
+  X=$(./yq e test.yml)
+  expected="# comment"
+  assertEquals 0 $?
+  assertEquals "$expected" "$X"
+}
+
+testEmptyEvalNoNewLine() {
+  echo -n "#comment" >test.yml
+  X=$(./yq e test.yml)
+  expected=$(cat test.yml)
+  assertEquals 0 $?
+  assertEquals "$expected" "$X"
+}
+
+testEmptyEvalNoNewLineWithExpression() {
+  echo -n "# comment" >test.yml
+  X=$(./yq e '.apple = "tree"' test.yml)
+  read -r -d '' expected << EOM
+# comment
+apple: tree
+EOM
+  assertEquals "$expected" "$X"
+}
+
+testEmptyEvalPipe() {
+  X=$(./yq e - < test.yml)
+  assertEquals 0 $?
+}
+
+testEmptyCommentsWithExpressionEval() {
+  read -r -d '' expected << EOM
+# comment
+apple: tree
+EOM
+
+  X=$(./yq e '.apple="tree"' test.yml)
+
+  assertEquals "$expected" "$X"
+}
+
+testEmptyCommentsWithExpressionEvalAll() {
+  read -r -d '' expected << EOM
+# comment
+apple: tree
+EOM
+
+  X=$(./yq ea '.apple="tree"' test.yml)
+
+  assertEquals "$expected" "$X"
+}
+
+testEmptyWithExpressionEval() {
+  rm test.yml
+  touch test.yml
+  expected="apple: tree"
+
+  X=$(./yq e '.apple="tree"' test.yml)
+
+  assertEquals "$expected" "$X"
+}
+
+testEmptyWithExpressionEvalAll() {
+  rm test.yml
+  touch test.yml
+  expected="apple: tree"
+
+  X=$(./yq ea '.apple="tree"' test.yml)
+
+  assertEquals "$expected" "$X"
+}
+
+
+source ./scripts/shunit2

acceptance_tests/flags.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  cat >test.yml <<EOL
+# comment
+EOL
+}
+
+testStringInterpolation() {
+    X=$(./yq -n '"Mike \(3 + 4)"')
+    assertEquals "Mike 7" "$X"
+}
+
+testNoStringInterpolation() {
+    X=$(./yq --string-interpolation=f -n '"Mike \(3 + 4)"')
+    assertEquals "Mike \(3 + 4)" "$X"
+}
+
+
+source ./scripts/shunit2

acceptance_tests/front-matter.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  cat >test.yml <<EOL
+---
+a: apple
+b: cat
+---
+not yaml
+c: at
+EOL
+}
+
+testFrontMatterProcessEval() {
+  read -r -d '' expected << EOM
+---
+a: apple
+b: dog
+---
+not yaml
+c: at
+EOM
+  ./yq e --front-matter="process" '.b = "dog"' test.yml -i
+  assertEquals "$expected" "$(cat test.yml)"
+}
+
+testFrontMatterProcessEvalAll() {
+  read -r -d '' expected << EOM
+---
+a: apple
+b: dog
+---
+not yaml
+c: at
+EOM
+  ./yq ea --front-matter="process" '.b = "dog"' test.yml -i
+  assertEquals "$expected" "$(cat test.yml)"
+}
+
+testFrontMatterExtractEval() {
+    cat >test.yml <<EOL
+a: apple
+b: cat
+---
+not yaml
+c: at
+EOL
+
+  read -r -d '' expected << EOM
+a: apple
+b: dog
+EOM
+  ./yq e --front-matter="extract" '.b = "dog"' test.yml -i
+  assertEquals "$expected" "$(cat test.yml)"
+}
+
+testFrontMatterExtractEvalAll() {
+  cat >test.yml <<EOL
+a: apple
+b: cat
+---
+not yaml
+c: at
+EOL
+
+  read -r -d '' expected << EOM
+a: apple
+b: dog
+EOM
+  ./yq ea --front-matter="extract" '.b = "dog"' test.yml -i
+  assertEquals "$expected" "$(cat test.yml)"
+}
+
+
+source ./scripts/shunit2

acceptance_tests/header-processing-off.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  
+}
+
+testLineCountFirstLineComment() {
+  cat >test.yml <<EOL
+#test123 
+abc: 123 
+test123: 123123 
+#comment 
+lalilu: lalilu
+EOL
+
+  X=$(./yq '.lalilu | line' --header-preprocess=false < test.yml)
+  assertEquals "5" "$X"
+}
+
+testArrayOfDocs() {
+  cat >test.yml <<EOL
+---
+# leading comment doc 1
+a: 1
+---
+# leading comment doc 2
+a: 2
+EOL
+
+read -r -d '' expected << EOM
+- # leading comment doc 1
+  a: 1
+- # leading comment doc 2
+  a: 2
+EOM
+
+  X=$(./yq ea '[.]' --header-preprocess=false < test.yml)
+  assertEquals "$expected" "$X"
+
+}
+
+source ./scripts/shunit2

acceptance_tests/inputs-format-auto.sh

@@ -0,0 +1,249 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml 2>/dev/null || true
+  rm test*.toml 2>/dev/null || true
+  rm test*.tfstate 2>/dev/null || true
+  rm test*.json 2>/dev/null || true
+  rm test*.properties 2>/dev/null || true
+  rm test*.csv 2>/dev/null || true
+  rm test*.tsv 2>/dev/null || true
+  rm test*.xml 2>/dev/null || true
+}
+
+testInputJson() {
+  cat >test.json <<EOL
+{ "mike" : { "things": "cool" } }
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "mike": {
+    "things": "cool"
+  }
+}
+EOM
+
+  X=$(./yq test.json)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.json)
+  assertEquals "$expected" "$X"
+}
+
+testInputToml() {
+  cat >test.toml <<EOL
+[owner]
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+EOL
+
+  read -r -d '' expected << EOM
+owner:
+  name: Tom Preston-Werner
+  dob: 1979-05-27T07:32:00-08:00
+EOM
+
+  X=$(./yq -oy test.toml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -oy test.toml)
+  assertEquals "$expected" "$X"
+}
+
+testInputTfstate() {
+  cat >test.tfstate <<EOL
+{ "mike" : { "things": "cool" } }
+EOL
+
+  read -r -d '' expected << EOM
+{"mike": {"things": "cool"}}
+EOM
+
+  X=$(./yq test.tfstate)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.tfstate)
+  assertEquals "$expected" "$X"
+}
+
+testInputJsonOutputYaml() {
+  cat >test.json <<EOL
+{ "mike" : { "things": "cool" } }
+EOL
+
+  read -r -d '' expected << EOM
+mike:
+  things: cool
+EOM
+
+  X=$(./yq test.json -oy)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.json -oy)
+  assertEquals "$expected" "$X"
+}
+
+testInputProperties() {
+  cat >test.properties <<EOL
+mike.things = hello
+EOL
+
+  read -r -d '' expected << EOM
+mike.things = hello
+EOM
+
+  X=$(./yq e test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.properties)
+  assertEquals "$expected" "$X"
+}
+
+testInputPropertiesGitHubAction() {
+  cat >test.properties <<EOL
+mike.things = hello
+EOL
+
+  read -r -d '' expected << EOM
+mike.things = hello
+EOM
+
+  X=$(cat /dev/null | ./yq e test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea test.properties)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSV() {
+  cat >test.csv <<EOL
+fruit,yumLevel
+apple,5
+banana,4
+EOL
+
+  read -r -d '' expected << EOM
+fruit,yumLevel
+apple,5
+banana,4
+EOM
+
+  X=$(./yq e test.csv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSVUTF8() {
+  read -r -d '' expected << EOM
+id,first,last
+1,john,smith
+1,jane,smith
+EOM
+
+  X=$(./yq utf8.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputTSV() {
+  cat >test.tsv <<EOL
+fruit	yumLevel
+apple	5
+banana	4
+EOL
+
+  read -r -d '' expected << EOM
+fruit	yumLevel
+apple	5
+banana	4
+EOM
+
+  X=$(./yq e test.tsv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.tsv)
+  assertEquals "$expected" "$X"
+}
+
+
+
+
+testInputXml() {
+  cat >test.xml <<EOL
+<cat legs="4">BiBi</cat>
+EOL
+
+  read -r -d '' expected << EOM
+<cat legs="4">BiBi</cat>
+EOM
+
+  X=$(./yq e test.xml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.xml)
+  assertEquals "$expected" "$X"
+}
+
+testInputXmlNamespaces() {
+  cat >test.xml <<EOL
+<?xml version="1.0"?>
+<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">
+</map>
+EOL
+
+  read -r -d '' expected << EOM
+<?xml version="1.0"?>
+<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url"></map>
+EOM
+
+  X=$(./yq e test.xml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.xml)
+  assertEquals "$expected" "$X"
+}
+
+
+
+testInputXmlStrict() {
+  cat >test.xml <<EOL
+<?xml version="1.0"?>
+<!DOCTYPE root [
+<!ENTITY writer "Catherine.">
+<!ENTITY copyright "(r) Great">
+]>
+<root>
+    <item>&writer;&copyright;</item>
+</root>
+EOL
+
+  X=$(./yq --xml-strict-mode test.xml  2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: bad file 'test.xml': XML syntax error on line 7: invalid character entity &writer;" "$X"
+
+  X=$(./yq ea --xml-strict-mode test.xml  2>&1)
+  assertEquals "Error: bad file 'test.xml': XML syntax error on line 7: invalid character entity &writer;" "$X"
+}
+
+testInputXmlGithubAction() {
+  cat >test.xml <<EOL
+<cat legs="4">BiBi</cat>
+EOL
+
+  read -r -d '' expected << EOM
+<cat legs="4">BiBi</cat>
+EOM
+
+  X=$(cat /dev/null | ./yq e test.xml)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea test.xml)
+  assertEquals "$expected" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/inputs-format.sh

@@ -0,0 +1,347 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml 2>/dev/null || true
+  rm test*.properties 2>/dev/null || true
+  rm test*.csv 2>/dev/null || true
+  rm test*.tsv 2>/dev/null || true
+  rm test*.xml 2>/dev/null || true
+  rm test*.tf 2>/dev/null || true
+}
+
+testInputProperties() {
+  cat >test.properties <<EOL
+mike.things = hello
+EOL
+
+  read -r -d '' expected << EOM
+mike:
+  things: hello
+EOM
+
+  X=$(./yq e -p=props test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=props test.properties)
+  assertEquals "$expected" "$X"
+}
+
+testInputPropertiesGitHubAction() {
+  cat >test.properties <<EOL
+mike.things = hello
+EOL
+
+  read -r -d '' expected << EOM
+mike:
+  things: hello
+EOM
+
+  X=$(cat /dev/null | ./yq e -p=props test.properties)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea -p=props test.properties)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSV() {
+  cat >test.csv <<EOL
+fruit,yumLevel
+apple,5
+banana,4
+EOL
+
+  read -r -d '' expected << EOM
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOM
+
+  X=$(./yq e -p=csv test.csv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=csv test.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSVCustomSeparator() {
+  cat >test.csv <<EOL
+fruit;yumLevel
+apple;5
+banana;4
+EOL
+
+  read -r -d '' expected << EOM
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOM
+
+  X=$(./yq -p=csv --csv-separator ";" test.csv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=csv --csv-separator ";" test.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSVNoAuto() {
+  cat >test.csv <<EOL
+thing1
+name: cat
+EOL
+
+  read -r -d '' expected << EOM
+- thing1: 'name: cat'
+EOM
+
+  X=$(./yq --csv-auto-parse=f test.csv -oy)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --csv-auto-parse=f test.csv -oy)
+  assertEquals "$expected" "$X"
+}
+
+testInputTSVNoAuto() {
+  cat >test.tsv <<EOL
+thing1
+name: cat
+EOL
+
+  read -r -d '' expected << EOM
+- thing1: 'name: cat'
+EOM
+
+  X=$(./yq --tsv-auto-parse=f test.tsv -oy)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --tsv-auto-parse=f test.tsv -oy)
+  assertEquals "$expected" "$X"
+}
+
+testInputCSVUTF8() {
+  read -r -d '' expected << EOM
+- id: 1
+  first: john
+  last: smith
+- id: 1
+  first: jane
+  last: smith
+EOM
+
+  X=$(./yq -p=csv utf8.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputTSV() {
+  cat >test.tsv <<EOL
+fruit	yumLevel
+apple	5
+banana	4
+EOL
+
+  read -r -d '' expected << EOM
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOM
+
+  X=$(./yq e -p=t test.tsv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=t test.tsv)
+  assertEquals "$expected" "$X"
+}
+
+testInputKYaml() {
+  cat >test.kyaml <<'EOL'
+# leading
+{
+  a: 1, # a line
+  # head b
+  b: 2,
+  c: [
+    # head d
+    "d", # d line
+  ],
+}
+EOL
+
+  read -r -d '' expected <<'EOM'
+# leading
+a: 1 # a line
+# head b
+b: 2
+c:
+  # head d
+  - d # d line
+EOM
+
+  X=$(./yq e -p=kyaml -P test.kyaml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=kyaml -P test.kyaml)
+  assertEquals "$expected" "$X"
+}
+
+
+
+
+testInputXml() {
+  cat >test.yml <<EOL
+<cat legs="4">BiBi</cat>
+EOL
+
+  read -r -d '' expected << EOM
+cat:
+  +content: BiBi
+  +@legs: "4"
+EOM
+
+  X=$(./yq e -p=xml test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=xml test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testInputXmlNamespaces() {
+  cat >test.xml <<EOL
+<?xml version="1.0"?>
+<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">
+</map>
+EOL
+
+  read -r -d '' expected << EOM
++p_xml: version="1.0"
+map:
+  +@xmlns: some-namespace
+  +@xmlns:xsi: some-instance
+  +@xsi:schemaLocation: some-url
+EOM
+
+  X=$(./yq e -p=xml test.xml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=xml test.xml)
+  assertEquals "$expected" "$X"
+}
+
+testInputXmlRoundtrip() {
+  cat >test.yml <<EOL
+<?xml version="1.0"?>
+<!DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" >
+<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">Meow</map>
+EOL
+
+  read -r -d '' expected << EOM
+<?xml version="1.0"?>
+<!DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" >
+<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">Meow</map>
+EOM
+
+  X=$(./yq -p=xml -o=xml test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=xml -o=xml test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testInputXmlStrict() {
+  cat >test.yml <<EOL
+<?xml version="1.0"?>
+<!DOCTYPE root [
+<!ENTITY writer "Catherine.">
+<!ENTITY copyright "(r) Great">
+]>
+<root>
+    <item>&writer;&copyright;</item>
+</root>
+EOL
+
+  X=$(./yq -p=xml --xml-strict-mode test.yml -o=xml 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: bad file 'test.yml': XML syntax error on line 7: invalid character entity &writer;" "$X"
+
+  X=$(./yq ea -p=xml --xml-strict-mode test.yml -o=xml 2>&1)
+  assertEquals "Error: bad file 'test.yml': XML syntax error on line 7: invalid character entity &writer;" "$X"
+}
+
+testInputXmlGithubAction() {
+  cat >test.yml <<EOL
+<cat legs="4">BiBi</cat>
+EOL
+
+  read -r -d '' expected << EOM
+cat:
+  +content: BiBi
+  +@legs: "4"
+EOM
+
+  X=$(cat /dev/null | ./yq e -p=xml test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea -p=xml test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testInputTerraform() {
+  cat >test.tf <<EOL
+resource "aws_s3_bucket" "example" {
+  bucket = "my-bucket"
+  tags = {
+    Environment = "Dev"
+    Project = "Test"
+  }
+}
+EOL
+
+  read -r -d '' expected << EOM
+resource "aws_s3_bucket" "example" {
+  bucket = "my-bucket"
+  tags = {
+    Environment = "Dev"
+    Project = "Test"
+  }
+}
+EOM
+
+  X=$(./yq test.tf)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea test.tf)
+  assertEquals "$expected" "$X"
+}
+
+testInputTerraformGithubAction() {
+  cat >test.tf <<EOL
+resource "aws_s3_bucket" "example" {
+  bucket = "my-bucket"
+  
+  tags = {
+    Environment = "Dev"
+    Project = "Test"
+  }
+}
+EOL
+
+  read -r -d '' expected << EOM
+resource "aws_s3_bucket" "example" {
+  bucket = "my-bucket"
+  tags = {
+    Environment = "Dev"
+    Project = "Test"
+  }
+}
+EOM
+
+  X=$(cat /dev/null | ./yq test.tf)
+  assertEquals "$expected" "$X"
+
+  X=$(cat /dev/null | ./yq ea test.tf)
+  assertEquals "$expected" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/leading-separator.sh

@@ -0,0 +1,529 @@
+#!/bin/bash
+
+
+# examples where header-preprocess is required
+
+setUp() {
+  rm test*.yml || true
+  cat >test.yml <<EOL
+---
+a: test
+EOL
+}
+
+testLeadingSeparatorWithDoc() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+---
+a: test
+---
+b: cool
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+---
+a: thing
+---
+b: cool
+EOM
+
+  X=$(./yq e '(select(di == 0) | .a) = "thing"' - < test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testLeadingSeparatorWithNewlinesNewDoc() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+
+
+---
+a: test
+---
+b: cool
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+
+
+---
+a: thing
+---
+b: cool
+EOM
+
+  X=$(./yq e '(select(di == 0) | .a) = "thing"' - < test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorWithNewlinesMoreComments() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+
+---
+# great
+
+a: test
+---
+b: cool
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+
+---
+# great
+
+a: thing
+---
+b: cool
+EOM
+
+  X=$(./yq e '(select(di == 0) | .a) = "thing"' - < test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testLeadingSeparatorWithDirective() {
+  cat >test.yml <<EOL
+%YAML 1.1
+---
+this: should really work
+EOL
+
+  read -r -d '' expected << EOM
+%YAML 1.1
+---
+this: should really work
+EOM
+
+  X=$(./yq < test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testLeadingSeparatorPipeIntoEvalSeq() {
+  X=$(./yq e - < test.yml)
+  expected=$(cat test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorExtractField() {
+  X=$(./yq e '.a' - < test.yml)
+  assertEquals "test" "$X"
+}
+
+testLeadingSeparatorExtractFieldWithCommentsAfterSep() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+EOL
+  X=$(./yq e '.a' test.yml)
+  assertEquals "test" "$X"
+}
+
+testLeadingSeparatorExtractFieldWithCommentsBeforeSep() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+---
+a: test
+EOL
+  X=$(./yq e '.a' test.yml)
+  assertEquals "test" "$X"
+}
+
+
+testLeadingSeparatorExtractFieldMultiDoc() {
+  cat >test.yml <<EOL
+---
+a: test
+---
+a: test2
+EOL
+
+  read -r -d '' expected << EOM
+test
+---
+test2
+EOM
+  X=$(./yq e '.a' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorExtractFieldMultiDocWithComments() {
+  cat >test.yml <<EOL
+# here
+---
+# there
+a: test
+# wherever
+---
+# you are
+a: test2
+# woop
+EOL
+
+  read -r -d '' expected << EOM
+test
+---
+test2
+EOM
+  X=$(./yq e '.a' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testLeadingSeparatorEvalSeq() {
+  X=$(./yq e test.yml)
+  expected=$(cat test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorPipeIntoEvalAll() {
+  X=$(./yq ea - < test.yml)
+  expected=$(cat test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testLeadingSeparatorEvalAll() {
+  X=$(./yq ea test.yml)
+  expected=$(cat test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalSimple() {
+  read -r -d '' expected << EOM
+---
+a: test
+---
+version: 3
+application: MyApp
+EOM
+
+
+  X=$(./yq e '.' test.yml examples/order.yaml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocInOneFile() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+---
+b: things
+EOL
+  expected=$(cat test.yml)
+  X=$(./yq e '.' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocInOneFileEvalAll() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+---
+b: things
+EOL
+  expected=$(cat test.yml)
+  X=$(./yq ea '.' test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalComments() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+a: test
+EOL
+
+cat >test2.yml <<EOL
+# this is another doc
+# great
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+a: test
+---
+# this is another doc
+# great
+b: sane
+EOM
+
+
+  X=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalCommentsTrailingSep() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+---
+a: test
+EOL
+
+cat >test2.yml <<EOL
+# this is another doc
+# great
+---
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+---
+a: test
+---
+# this is another doc
+# great
+---
+b: sane
+EOM
+
+
+  X=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiMultiDocEvalCommentsTrailingSep() {
+  cat >test.yml <<EOL
+# hi peeps
+# cool
+---
+a: test
+---
+a1: test2
+EOL
+
+cat >test2.yml <<EOL
+# this is another doc
+# great
+---
+b: sane
+---
+b2: cool
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+---
+a: test
+---
+a1: test2
+---
+# this is another doc
+# great
+---
+b: sane
+---
+b2: cool
+EOM
+
+
+  X=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalCommentsLeadingSep() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+EOL
+
+cat >test2.yml <<EOL
+---
+# this is another doc
+# great
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+---
+# hi peeps
+# cool
+a: test
+---
+# this is another doc
+# great
+b: sane
+EOM
+
+
+  X=$(./yq e '.' test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+# https://github.com/mikefarah/yq/issues/919
+testLeadingSeparatorDoesNotBreakCommentsOnOtherFiles() {
+  cat >test.yml <<EOL
+# a1
+a: 1
+# a2
+EOL
+
+cat >test2.yml <<EOL
+# b1
+b: 2
+# b2
+EOL
+
+  read -r -d '' expected << EOM
+# a1
+a: 1
+# a2
+
+# b1
+b: 2
+# b2
+EOM
+
+
+  X=$(./yq ea 'select(fi == 0) * select(fi == 1)' test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalCommentsStripComments() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+---
+# this is another doc
+# great
+b: sane
+EOL
+
+  # it will be hard to remove that top level separator
+  read -r -d '' expected << EOM
+a: test
+---
+b: sane
+EOM
+
+  X=$(./yq e '... comments=""'  test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalCommentsLeadingSepNoDocFlag() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+---
+# this is another doc
+# great
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+# hi peeps
+# cool
+a: test
+# this is another doc
+# great
+b: sane
+EOM
+
+
+  X=$(./yq e '.' --no-doc test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalJsonFlag() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+EOL
+
+cat >test2.yml <<EOL
+---
+# this is another doc
+# great
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "a": "test"
+}
+{
+  "b": "sane"
+}
+EOM
+
+
+  X=$(./yq e '.' -j test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalAllJsonFlag() {
+  cat >test.yml <<EOL
+---
+# hi peeps
+# cool
+a: test
+EOL
+
+cat >test2.yml <<EOL
+---
+# this is another doc
+# great
+b: sane
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "a": "test"
+}
+{
+  "b": "sane"
+}
+EOM
+
+
+  X=$(./yq ea '.' -j test.yml test2.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLeadingSeparatorMultiDocEvalAll() {
+  read -r -d '' expected << EOM
+---
+a: test
+---
+version: 3
+application: MyApp
+EOM
+
+
+  X=$(./yq ea '.' test.yml examples/order.yaml)
+  assertEquals "$expected" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/load-file.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+testLoadFileNotExist() {
+  result=$(./yq e -n 'load("cat.yml")' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: failed to load cat.yml: open cat.yml: no such file or directory" "$result"
+}
+
+testLoadFileExpNotExist() {
+  result=$(./yq e -n 'load(.a)' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: filename expression returned nil" "$result"
+}
+
+testStrLoadFileNotExist() {
+  result=$(./yq e -n 'strload("cat.yml")' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: failed to load cat.yml: open cat.yml: no such file or directory" "$result"
+}
+
+testStrLoadFileExpNotExist() {
+  result=$(./yq e -n 'strload(.a)' 2>&1)
+  assertEquals 1 $?
+  assertEquals "Error: filename expression returned nil" "$result"
+}
+
+source ./scripts/shunit2

acceptance_tests/nul-separator.sh

@@ -0,0 +1,286 @@
+#!/bin/bash
+
+setUp() {
+    rm test*.yml || true
+}
+
+## Convenient bash shortcut to read records of NUL separated values
+## from stdin the safe way. See example usage in the next tests.
+read-0() {
+    local eof="" IFS=''
+    while [ "$1" ]; do
+        ## - The `-r` avoids bad surprise with '\n' and other interpreted
+        ##   sequences that can be read.
+        ## - The `-d ''` is the (strange?) way to refer to NUL delimiter.
+        ## - The `--` is how to avoid unpleasant surprises if your
+        ##   "$1" starts with "-" (minus) sign. This protection also
+        ##   will produce a readable error if you want to try to start
+        ##   your variable names with a "-".
+        read -r -d '' -- "$1" || eof=1
+        shift
+    done
+    [ -z "$eof" ] ## fail on EOF
+}
+
+## Convenient bash shortcut to be used with the next function `p-err`
+## to read NUL separated values the safe way AND catch any errors from
+## the process creating the stream of NUL separated data.  See example
+## usage in the tests.
+read-0-err() {
+    local ret="$1" eof="" idx=0 last=
+    read -r -- "${ret?}" <<<"0"
+    shift
+    while [ "$1" ]; do
+        last=$idx
+        read -r -d '' -- "$1" || {
+            ## Put this last value in ${!ret}
+            eof="$1"
+            read -r -- "$ret" <<<"${!eof}"
+            break
+        }
+        ((idx++))
+        shift
+    done
+    [ -z "$eof" ] || {
+        if [ "$last" != 0 ]; then
+            ## Uhoh, we have no idea if the errorlevel of the internal
+            ## command was properly delimited with a NUL char, and
+            ## anyway something went really wrong at least about the
+            ## number of fields separated by NUL char and the one
+            ## expected.
+            echo "Error: read-0-err couldn't fill all value $ret = '${!ret}', '$eof', '${!eof}'" >&2
+            read -r -- "$ret" <<<"not-enough-values"
+        else
+            if ! [[ "${!ret}" =~ ^[0-9]+$ && "${!ret}" -ge 0 && "${!ret}" -le 127 ]]; then
+                ## This could happen if you don't use `p-err` wrapper,
+                ## or used stdout in unexpected ways in your inner
+                ## command.
+                echo "Error: last value is not a number, did you finish with an errorlevel ?" >&2
+                read -r -- "$ret" <<<"last-value-not-a-number"
+            fi
+        fi
+        false
+    }
+}
+
+## Simply runs command given as argument and adds errorlevel in the
+## standard output. Is expected to be used in tandem with
+## `read-0-err`.
+p-err() {
+    local exp="$1"
+    "$@"
+    printf "%s" "$?"
+}
+
+wyq-r() {
+    local exp="$1"
+    ./yq e -0 -r=false "$1"
+    printf "%s" "$?"
+}
+
+testBasicUsageRaw() {
+  cat >test.yml <<EOL
+a: foo
+b: bar
+EOL
+
+  printf "foo\0bar\0" > expected.out
+
+  ## We need to compare binary content here. We have to filter the compared
+  ## content through a representation that gets rid of NUL chars but accurately
+  ## transcribe the content.
+  ## Also as it would be nice to have a pretty output in case the test fails,
+  ## we use here 'hd': a widely available shortcut to 'hexdump' that will
+  ## pretty-print any binary to it's hexadecimal representation.
+  ##
+  ## Note that the standard `assertEquals` compare its arguments
+  ## value, but they can't hold NUL characters (this comes from the
+  ## limitation of the C API of `exec*(..)` functions that requires
+  ## `const char *arv[]`). And these are NUL terminated strings.  As a
+  ## consequence, the NUL characters gets removed in bash arguments.
+  assertEquals "$(hd expected.out)" \
+               "$(./yq e -0 '.a, .b' test.yml | hd)"
+
+  rm expected.out
+}
+
+testBasicUsage() {
+  local a b
+  cat >test.yml <<EOL
+a: foo
+b: bar
+EOL
+
+  ## We provide 2 values, and ask to fill 2 variables.
+  read-0 a b < <(./yq e -0 '.a, .b' test.yml)
+  assertEquals "$?" "0"      ## Everything is fine
+  assertEquals "foo" "$a"    ## Values are correctly parsed
+  assertEquals "bar" "$b"
+
+  a=YYY ; b=XXX
+  ## Not enough values provided to fill `a` and `b`.
+  read-0 a b < <(./yq e -0 '.a' test.yml)
+  assertEquals "$?" "1"      ## An error was emitted
+  assertEquals "foo" "$a"    ## First value was correctly parsed
+  assertEquals "" "$b"       ## Second was still reset
+
+  ## Error from inner command are not catchable !. Use
+  ## `read-0-err`/`p-err` for that.
+  read-0 a < <(printf "\0"; ./yq e -0 'xxx' test.yml; )
+  assertEquals "$?" "0"
+
+}
+
+testBasicUsageJson() {
+  cat >test.yml <<EOL
+a:
+  x: foo
+b: bar
+EOL
+
+  read-0 a b < <(./yq e -0 -o=json '.a, .b' test.yml)
+
+  assertEquals '{
+  "x": "foo"
+}' "$a"
+  assertEquals '"bar"' "$b"
+
+}
+
+testFailWithValueContainingNUL() {
+  local a b c
+  ## Note that value of field 'a' actually contains a NUL char !
+  cat >test.yml <<EOL
+a: "foo\u0000bar"
+b: 1
+c: |
+  wiz
+  boom
+EOL
+
+  ## We are looking for trouble with asking to separated fields with NUL
+  ## char and requested value `.a` actually contains itself a NUL char !
+  read-0 a b c < <(./yq e -0 '.a, .b, .c' test.yml)
+  assertNotEquals "0" "$?"   ## read-0 failed to fill all values
+
+  ## But here, we can request for one value, even if `./yq` fails
+  read-0 b < <(./yq e -0 '.b, .a' test.yml)
+  assertEquals "0" "$?"   ## read-0 succeeds at feeding the first value
+  ## Note: to catch the failure of `yq`, see in the next tests the usage
+  ## of `read-0-err`.
+
+  ## using -r=false solves any NUL containing value issues, but keeps
+  ## all in YAML representation:
+  read-0 a b c < <(./yq e -0 -r=false '.a, .b, .c' test.yml)
+  assertEquals "0" "$?"    ## All goes well despite asking for `a` value
+
+  assertEquals '"foo\0bar"' "$a"   ## This is a YAML string representation
+  assertEquals '1' "$b"
+  assertEquals '|
+  wiz
+  boom' "$c"
+}
+
+testStandardLoop() {
+    local E a b res
+
+    ## Here everything is normal: 4 values, that will be paired
+    ## in key/values.
+    cat >test.yml <<EOL
+- yay
+- wiz
+- hop
+- pow
+EOL
+
+    res=""
+    while read-0-err E a b; do
+        res+="$a: $b;"
+    done < <(p-err ./yq -0 '.[]' test.yml)
+
+    assertEquals "0" "$E"                     ## errorlevel of internal command
+    assertEquals "yay: wiz;hop: pow;" "$res"  ## expected result
+}
+
+testStandardLoopWithoutEnoughValues() {
+    local E a b res
+
+    ## Here 5 values, there will be a missing value when reading
+    ## pairs of value.
+    cat >test.yml <<EOL
+- yay
+- wiz
+- hop
+- pow
+- kwak
+EOL
+
+    res=""
+    ## The loop will succeed 2 times then fail
+    while read-0-err E a b; do
+        res+="$a: $b;"
+    done < <(p-err ./yq -0 '.[]' test.yml)
+
+    assertEquals "not-enough-values" "$E"     ## Not enough value error
+    assertEquals "yay: wiz;hop: pow;" "$res"  ## the 2 full key/value pairs
+
+}
+
+testStandardLoopWithInternalCmdError() {
+    local E a b res
+
+    ## Note the third value contains a NUL char !
+    cat >test.yml <<EOL
+- yay
+- wiz
+- "foo\0bar"
+- hop
+- pow
+EOL
+
+    res=""
+    ## It should be only upon the second pass in the loop that
+    ## read-0-err will catch the fact that there is an error !
+    while read-0-err E a b; do
+        res+="$a: $b;"
+    done < <(p-err ./yq -0 '.[]' test.yml)
+    assertEquals "1" "$E"            ## Internal command errorlevel (from `./yq`)
+    assertEquals "yay: wiz;" "$res"  ## first 2 values were ok at least
+
+}
+
+testStandardLoopNotEnoughErrorEatsCmdError() {
+    local E a b res
+
+    ## Because of possible edge cases where the internal errorlevel
+    ## reported by `p-err` in the standard output might be mangled
+    ## with the unfinished record, `read-0-err E ...` will NOT report
+    ## the internal command error in the variable E and instead will
+    ## store the value 'not-enough-values'. In real world, anyway, you
+    ## will want to react the same if the internal command failed
+    ## and/or you didn't get as much values as expected while
+    ## reading. Keep in mind also that standard error is not
+    ## swallowed, so you can read reports from the inner command AND
+    ## from `read-0-err`.
+
+    ## Here, note that the fourth value contains a NUL char !
+    cat >test.yml <<EOL
+- yay
+- wiz
+- hop
+- "foo\0bar"
+- pow
+EOL
+
+    res=""
+    ## It should be only upon the second loop that read-0-err will catch
+    ## the fact that there are not enough data to fill the requested variables
+    while read-0-err E a b; do
+        res+="$a: $b;"
+    done < <(p-err ./yq -0 '.[]' test.yml)
+    assertEquals "not-enough-values" "$E"          ## Not enough values error eats internal error !
+    assertEquals "yay: wiz;" "$res"  ## first 2 values were ok at least
+}
+
+
+source ./scripts/shunit2

acceptance_tests/output-format.sh

@@ -0,0 +1,392 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+}
+
+testOutputJsonDeprecated() {
+  cat >test.yml <<EOL
+a: {b: ["cat"]}
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "a": {
+    "b": [
+      "cat"
+    ]
+  }
+}
+EOM
+
+  X=$(./yq e -j test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -j test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputJson() {
+  cat >test.yml <<EOL
+a: {b: ["cat"]}
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "a": {
+    "b": [
+      "cat"
+    ]
+  }
+}
+EOM
+
+  X=$(./yq e --output-format=json test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=json test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputYamlRawDefault() {
+  cat >test.yml <<EOL
+a: "cat"
+EOL
+
+  X=$(./yq e  '.a' test.yml)
+  assertEquals "cat" "$X"
+
+  X=$(./yq ea '.a' test.yml)
+  assertEquals "cat" "$X"
+}
+
+testOutputYamlRawOff() {
+  cat >test.yml <<EOL
+a: "cat"
+EOL
+
+  X=$(./yq e -r=false '.a' test.yml)
+  assertEquals "\"cat\"" "$X"
+
+  X=$(./yq ea -r=false '.a' test.yml)
+  assertEquals "\"cat\"" "$X"
+}
+
+testOutputYamlRawOnRoot() {
+  cat >test.yml <<EOL
+'a'
+EOL
+
+  X=$(./yq e -r '.' test.yml)
+  assertEquals "a" "$X"
+}
+
+testOutputJsonRaw() {
+  cat >test.yml <<EOL
+a: cat
+EOL
+
+  X=$(./yq e -r --output-format=json '.a' test.yml)
+  assertEquals "cat" "$X"
+
+  X=$(./yq ea -r --output-format=json '.a' test.yml)
+  assertEquals "cat" "$X"
+}
+
+testOutputJsonDefault() {
+  cat >test.yml <<EOL
+a: cat
+EOL
+
+  X=$(./yq e --output-format=json '.a' test.yml)
+  assertEquals "\"cat\"" "$X"
+
+  X=$(./yq ea --output-format=json '.a' test.yml)
+  assertEquals "\"cat\"" "$X"
+}
+
+
+testOutputJsonShort() {
+  cat >test.yml <<EOL
+a: {b: ["cat"]}
+EOL
+
+  read -r -d '' expected << EOM
+{
+  "a": {
+    "b": [
+      "cat"
+    ]
+  }
+}
+EOM
+
+  X=$(./yq e -o=j test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=j test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputProperties() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+a.b.c.0 = cat cat
+EOM
+
+  X=$(./yq e --output-format=props test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=props test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputPropertiesDontUnwrap() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+a.b.c.0 = "cat cat"
+EOM
+
+  X=$(./yq e -r=false --output-format=props test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -r=false --output-format=props test.yml)
+  assertEquals "$expected" "$X"
+}
+
+
+testOutputPropertiesShort() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+a.b.c.0 = cat cat
+EOM
+
+  X=$(./yq e -o=p test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=p test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputCSV() {
+  cat >test.yml <<EOL
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOL
+
+  read -r -d '' expected << EOM
+fruit,yumLevel
+apple,5
+banana,4
+EOM
+
+  X=$(./yq -o=c test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=csv test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputCSVCustomSeparator() {
+  cat >test.yml <<EOL
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOL
+
+  read -r -d '' expected << EOM
+fruit;yumLevel
+apple;5
+banana;4
+EOM
+
+  X=$(./yq -oc --csv-separator ";" test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=csv --csv-separator ";" test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputTSV() {
+  cat >test.yml <<EOL
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOL
+
+  read -r -d '' expected << EOM
+fruit	yumLevel
+apple	5
+banana	4
+EOM
+
+  X=$(./yq -o=t test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=tsv test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputXml() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+<a>
+  <b>
+    <c>cat</c>
+  </b>
+</a>
+EOM
+
+  X=$(./yq e --output-format=xml test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=xml test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputXmlShort() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+<a>
+  <b>
+    <c>cat</c>
+  </b>
+</a>
+EOM
+
+  X=$(./yq e --output-format=x test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=x test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputKYaml() {
+  cat >test.yml <<'EOL'
+# leading
+a: 1 # a line
+# head b
+b: 2
+c:
+  # head d
+  - d # d line
+EOL
+
+  read -r -d '' expected <<'EOM'
+# leading
+{
+  a: 1, # a line
+  # head b
+  b: 2,
+  c: [
+    # head d
+    "d", # d line
+  ],
+}
+EOM
+
+  X=$(./yq e --output-format=kyaml test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=kyaml test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputKYamlShort() {
+  cat >test.yml <<EOL
+a: b
+EOL
+
+  read -r -d '' expected <<'EOM'
+{
+  a: "b",
+}
+EOM
+
+  X=$(./yq e -o=ky test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=ky test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputXmComplex() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat", "dog"], +@f: meow}}
+EOL
+
+  read -r -d '' expected << EOM
+<a>
+  <b f="meow">
+    <c>cat</c>
+    <c>dog</c>
+  </b>
+</a>
+EOM
+
+  X=$(./yq e --output-format=x test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --output-format=x test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testLuaOutputPretty() {
+  cat >test.yml <<EOL
+animals:
+  cat: meow
+EOL
+
+  read -r -d '' expected << EOM
+return {
+	["animals"] = {
+		["cat"] = "meow";
+	};
+};
+EOM
+
+  X=$(./yq e --output-format=lua test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq e --output-format=lua --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+}
+
+testLuaOutputSubset() {
+  cat >test.yml <<EOL
+animals:
+  cat: meow
+EOL
+
+  read -r -d '' expected << EOM
+return {
+	["cat"] = "meow";
+};
+EOM
+
+  X=$(./yq e --output-format=lua '.animals' test.yml)
+  assertEquals "$expected" "$X"
+
+}
+
+source ./scripts/shunit2

acceptance_tests/pipe.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  cat >test.yml <<EOL
+a: frog
+EOL
+}
+
+testPipeViaCatWithParam() {
+  X=$(cat test.yml | ./yq '.a')
+  assertEquals "frog" "$X"
+}
+
+testPipeViaCatWithParamEval() {
+  X=$(cat test.yml | ./yq e '.a')
+  assertEquals "frog" "$X"
+}
+
+testPipeViaCatWithParamEvalAll() {
+  X=$(cat test.yml | ./yq ea '.a')
+  assertEquals "frog" "$X"
+}
+
+testPipeViaCatNoParam() {
+  X=$(cat test.yml | ./yq)
+  assertEquals "a: frog" "$X"
+}
+
+testPipeViaCatNoParamEval() {
+  X=$(cat test.yml | ./yq e)
+  assertEquals "a: frog" "$X"
+}
+
+testPipeViaCatNoParamEvalAll() {
+  X=$(cat test.yml | ./yq ea)
+  assertEquals "a: frog" "$X"
+}
+
+testPipeViaFileishWithParam() {
+  X=$(./yq '.a' < test.yml)
+  assertEquals "frog" "$X"
+}
+
+testPipeViaFileishWithParamEval() {
+  X=$(./yq e '.a' < test.yml)
+  assertEquals "frog" "$X"
+}
+
+testPipeViaFileishWithParamEvalAll() {
+  X=$(./yq ea '.a' < test.yml)
+  assertEquals "frog" "$X"
+}
+
+testPipeViaFileishNoParam() {
+  X=$(./yq < test.yml)
+  assertEquals "a: frog" "$X"
+}
+
+testPipeViaFileishNoParamEval() {
+  X=$(./yq e < test.yml)
+  assertEquals "a: frog" "$X"
+}
+
+testPipeViaFileishNoParamEvalAll() {
+  X=$(./yq ea < test.yml)
+  assertEquals "a: frog" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/pretty-print.sh

@@ -0,0 +1,176 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+}
+
+testPrettyPrintWithBooleans() {
+  cat >test.yml <<EOL
+leaveUnquoted: [yes, no, on, off, y, n, true, false]
+leaveQuoted: ["yes", "no", "on", "off", "y", "n", "true", "false"]
+
+EOL
+
+  read -r -d '' expected << EOM
+leaveUnquoted:
+  - yes
+  - no
+  - on
+  - off
+  - y
+  - n
+  - true
+  - false
+leaveQuoted:
+  - "yes"
+  - "no"
+  - "on"
+  - "off"
+  - "y"
+  - "n"
+  - "true"
+  - "false"
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintWithBooleansCapitals() {
+  cat >test.yml <<EOL
+leaveUnquoted: [YES, NO, ON, OFF, Y, N, TRUE, FALSE]
+leaveQuoted: ["YES", "NO", "ON", "OFF", "Y", "N", "TRUE", "FALSE"]
+EOL
+
+  read -r -d '' expected << EOM
+leaveUnquoted:
+  - YES
+  - NO
+  - ON
+  - OFF
+  - Y
+  - N
+  - TRUE
+  - FALSE
+leaveQuoted:
+  - "YES"
+  - "NO"
+  - "ON"
+  - "OFF"
+  - "Y"
+  - "N"
+  - "TRUE"
+  - "FALSE"
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintOtherStringValues() {
+  cat >test.yml <<EOL
+leaveUnquoted: [yesSir, hellno, bonapite]
+makeUnquoted: ["yesSir", "hellno", "bonapite"]
+EOL
+
+  read -r -d '' expected << EOM
+leaveUnquoted:
+  - yesSir
+  - hellno
+  - bonapite
+makeUnquoted:
+  - yesSir
+  - hellno
+  - bonapite
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintKeys() {
+  cat >test.yml <<EOL
+"removeQuotes": "please"
+EOL
+
+  read -r -d '' expected << EOM
+removeQuotes: please
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintOtherStringValues() {
+  cat >test.yml <<EOL
+leaveUnquoted: [yesSir, hellno, bonapite]
+makeUnquoted: ["yesSir", "hellno", "bonapite"]
+EOL
+
+  read -r -d '' expected << EOM
+leaveUnquoted:
+  - yesSir
+  - hellno
+  - bonapite
+makeUnquoted:
+  - yesSir
+  - hellno
+  - bonapite
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintStringBlocks() {
+  cat >test.yml <<EOL
+"removeQuotes": | 
+  "please"
+EOL
+
+  read -r -d '' expected << EOM
+removeQuotes: |
+  "please"
+EOM
+
+  X=$(./yq e --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testPrettyPrintWithExpression() {
+  cat >test.yml <<EOL
+a: {b: {c: ["cat"]}}
+EOL
+
+  read -r -d '' expected << EOM
+b:
+  c:
+    - cat
+EOM
+
+  X=$(./yq e '.a' --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea '.a' --prettyPrint test.yml)
+  assertEquals "$expected" "$X"
+}
+
+source ./scripts/shunit2

acceptance_tests/shebang.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yq || true
+  cat >test.yq <<EOL
+#!./yq
+.a.b
+EOL
+chmod +x test.yq
+
+rm test*.yml || true
+  cat >test.yml <<EOL
+a: {b: apple}
+EOL
+}
+
+testCanExecYqFile() {
+  read -r -d '' expected << EOM
+apple
+EOM
+   X=$(./test.yq test.yml)
+  assertEquals "$expected" "$X"
+}
+
+source ./scripts/shunit2
+

acceptance_tests/split-printer.sh

@@ -0,0 +1,227 @@
+#!/bin/bash
+
+setUp() {
+  rm test*.yml || true
+  rm -rf test_dir* || true
+}
+
+testBasicSplitWithName() {
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+  ./yq e test.yml -s ".a"
+
+  doc1=$(cat test_doc1.yml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_doc2.yml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+testBasicSplitWithNameCustomExtension() {
+  rm test*.yaml || true
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+  ./yq e test.yml -s '.a + ".yaml"'
+
+  doc1=$(cat test_doc1.yaml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_doc2.yaml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+
+
+
+testSplitFromFile() {
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+cat >test_splitExp.yml <<EOL
+.a
+EOL
+
+  ./yq test.yml --split-exp-file test_splitExp.yml
+
+  doc1=$(cat test_doc1.yml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_doc2.yml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+testBasicSplitWithNameEvalAll() {
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+  ./yq ea test.yml -s ".a"
+
+  doc1=$(cat test_doc1.yml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_doc2.yml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+testBasicSplitWithIndex() {
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+  ./yq e test.yml -s '"test_" + $index'
+
+  doc1=$(cat test_0.yml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_1.yml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+testBasicSplitWithIndexEvalAll() {
+  cat >test.yml <<EOL
+a: test_doc1
+--- 
+a: test_doc2
+EOL
+
+  ./yq ea test.yml -s '"test_" + $index'
+
+  doc1=$(cat test_0.yml)
+  
+  assertEquals "a: test_doc1" "$doc1"
+
+  doc2=$(cat test_1.yml)
+  read -r -d '' expectedDoc2 << EOM
+---
+a: test_doc2
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+
+testArraySplitWithNameNoSeparators() {
+  cat >test.yml <<EOL
+- name: test_fred
+  age: 35
+- name: test_catherine
+  age: 37
+EOL
+
+  ./yq e --no-doc -s ".name"  ".[]" test.yml 
+
+  doc1=$(cat test_fred.yml)
+  read -r -d '' expectedDoc1 << EOM
+name: test_fred
+age: 35
+EOM
+
+  assertEquals "$expectedDoc1" "$doc1"
+
+  doc2=$(cat test_catherine.yml)
+  read -r -d '' expectedDoc2 << EOM
+name: test_catherine
+age: 37
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+}
+
+testArraySplitWithNameNoSeparatorsEvalAll() {
+  cat >test.yml <<EOL
+- name: test_fred
+  age: 35
+- name: test_catherine
+  age: 37
+EOL
+
+cat >test2.yml <<EOL
+- name: test_mike
+  age: 564
+EOL
+
+  ./yq ea --no-doc -s ".name"  ".[]" test.yml test2.yml
+
+  doc1=$(cat test_fred.yml)
+  read -r -d '' expectedDoc1 << EOM
+name: test_fred
+age: 35
+EOM
+
+  assertEquals "$expectedDoc1" "$doc1"
+
+  doc2=$(cat test_catherine.yml)
+  read -r -d '' expectedDoc2 << EOM
+name: test_catherine
+age: 37
+EOM
+  assertEquals "$expectedDoc2" "$doc2"
+
+
+  doc3=$(cat test_mike.yml)
+  read -r -d '' expectedDoc3 << EOM
+name: test_mike
+age: 564
+EOM
+  assertEquals "$expectedDoc3" "$doc3"
+}
+
+testSplitWithDirectories() {
+  cat >test.yml <<EOL
+f: test_dir1/test_file1
+---
+f: test_dir2/dir22/test_file2
+---
+f: test_file3
+EOL
+
+  ./yq e --no-doc -s ".f" test.yml
+
+  doc1=$(cat test_dir1/test_file1.yml)
+  assertEquals "f: test_dir1/test_file1" "$doc1"
+  doc2=$(cat test_dir2/dir22/test_file2.yml)
+  assertEquals "f: test_dir2/dir22/test_file2" "$doc2"
+  doc3=$(cat test_file3.yml)
+  assertEquals "f: test_file3" "$doc3"
+}
+
+source ./scripts/shunit2

action.yml

@@ -1,13 +1,17 @@
 name: 'yq - portable yaml processor'
 description: 'create, read, update, delete, merge, validate and do more with yaml'
-icon: command
-color: gray-dark
+branding:
+  icon: command
+  color: gray-dark
 inputs:
   cmd:
     description: 'The Command which should be run'
     required: true
+outputs:
+  result:
+    description: "The complete result from the yq command being run"
 runs:
   using: 'docker'
-  image: 'github-action/Dockerfile'
+  image: 'docker://mikefarah/yq:4-githubaction'
   args:
     - ${{ inputs.cmd }}

agents.md

@@ -0,0 +1,422 @@
+# General rules
+✅ **DO:**
+- You can use ./yq with the `--debug-node-info` flag to get a deeper understanding of the ast.
+- run ./scripts/format.sh to format the code; then ./scripts/check.sh lint and finally ./scripts/spelling.sh to check spelling.
+- Add comprehensive tests to cover the changes
+- Run test suite to ensure there is no regression
+- Use UK english spelling
+
+❌ **DON'T:**
+- Git add or commit
+- Add comments to functions that are self-explanatory
+
+
+
+# Adding a New Encoder/Decoder
+
+This guide explains how to add support for a new format (encoder/decoder) to yq without modifying `candidate_node.go`.
+
+## Overview
+
+The encoder/decoder architecture in yq is based on two main interfaces:
+
+- **Encoder**: Converts a `CandidateNode` to output in a specific format
+- **Decoder**: Reads input in a specific format and creates a `CandidateNode`
+
+Each format is registered in `pkg/yqlib/format.go` and made available through factory functions.
+
+## Architecture
+
+### Key Files
+
+- `pkg/yqlib/encoder.go` - Defines the `Encoder` interface
+- `pkg/yqlib/decoder.go` - Defines the `Decoder` interface
+- `pkg/yqlib/format.go` - Format registry and factory functions
+- `pkg/yqlib/operator_encoder_decoder.go` - Encode/decode operators
+- `pkg/yqlib/encoder_*.go` - Encoder implementations
+- `pkg/yqlib/decoder_*.go` - Decoder implementations
+
+### Interfaces
+
+**Encoder Interface:**
+```go
+type Encoder interface {
+    Encode(writer io.Writer, node *CandidateNode) error
+    PrintDocumentSeparator(writer io.Writer) error
+    PrintLeadingContent(writer io.Writer, content string) error
+    CanHandleAliases() bool
+}
+```
+
+**Decoder Interface:**
+```go
+type Decoder interface {
+    Init(reader io.Reader) error
+    Decode() (*CandidateNode, error)
+}
+```
+
+## Step-by-Step: Adding a New Encoder/Decoder
+
+### Step 1: Create the Encoder File
+
+Create `pkg/yqlib/encoder_<format>.go` implementing the `Encoder` interface:
+- `Encode()` - Convert a `CandidateNode` to your format and write to the output writer
+- `PrintDocumentSeparator()` - Handle document separators if your format requires them
+- `PrintLeadingContent()` - Handle leading content/comments if supported
+- `CanHandleAliases()` - Return whether your format supports YAML aliases
+
+See `encoder_json.go` or `encoder_base64.go` for examples.
+
+### Step 2: Create the Decoder File
+
+Create `pkg/yqlib/decoder_<format>.go` implementing the `Decoder` interface:
+- `Init()` - Initialize the decoder with the input reader and set up any needed state
+- `Decode()` - Decode one document from the input and return a `CandidateNode`, or `io.EOF` when finished
+
+See `decoder_json.go` or `decoder_base64.go` for examples.
+
+### Step 3: Create Tests (Mandatory)
+
+Create a test file `pkg/yqlib/<format>_test.go` using the `formatScenario` pattern:
+- Define test scenarios as `formatScenario` structs with fields: `description`, `input`, `expected`, `scenarioType`
+- `scenarioType` can be `"decode"` (test decoding to YAML) or `"roundtrip"` (encode/decode preservation)
+- Create a helper function `test<Format>Scenario()` that switches on `scenarioType`
+- Create main test function `Test<Format>FormatScenarios()` that iterates over scenarios
+- The main test function should use `documentScenarios` to ensure testcase documentation is generated.
+
+Test coverage must include:
+- Basic data types (scalars, arrays, objects/maps)
+- Nested structures
+- Edge cases (empty inputs, special characters, escape sequences)
+- Format-specific features or syntax
+- Round-trip tests: decode → encode → decode should preserve data
+
+See `hcl_test.go` for a complete example.
+
+### Step 4: Register the Format in format.go
+
+Edit `pkg/yqlib/format.go`:
+
+1. Add a new format variable:
+   - `"<format>"` is the formal name (e.g., "json", "yaml")
+   - `[]string{...}` contains short aliases (can be empty)
+   - The first function creates an encoder (can be nil for encode-only formats)
+   - The second function creates a decoder (can be nil for decode-only formats)
+
+2. Add the format to the `Formats` slice in the same file
+
+See existing formats in `format.go` for the exact structure.
+
+### Step 5: Handle Encoder Configuration (if needed)
+
+If your format has preferences/configuration options:
+
+1. Create a preferences struct with your configuration fields
+2. Update the encoder to accept preferences in its factory function
+3. Update `format.go` to pass the configured preferences
+4. Update `operator_encoder_decoder.go` if special indent handling is needed (see existing formats like JSON and YAML for the pattern)
+
+This pattern is optional and only needed if your format has user-configurable options.
+
+## Build Tags
+
+Use build tags to allow optional compilation of formats:
+- Add `//go:build !yq_no<format>` at the top of your encoder and decoder files
+- Create a no-build version in `pkg/yqlib/no_<format>.go` that returns nil for encoder/decoder factories
+
+This allows users to compile yq without certain formats using: `go build -tags yq_no<format>`
+
+## Working with CandidateNode
+
+The `CandidateNode` struct represents a YAML node with:
+- `Kind`: The node type (ScalarNode, SequenceNode, MappingNode)
+- `Tag`: The YAML tag (e.g., "!!str", "!!int", "!!map")
+- `Value`: The scalar value (for ScalarNode only)
+- `Content`: Child nodes (for SequenceNode and MappingNode)
+
+Key methods:
+- `node.guessTagFromCustomType()` - Infer the tag from Go type
+- `node.AsList()` - Convert to a list for processing
+- `node.CreateReplacement()` - Create a new replacement node
+- `NewCandidate()` - Create a new CandidateNode
+
+## Key Points
+
+✅ **DO:**
+- Implement only the `Encoder` and `Decoder` interfaces
+- Register your format in `format.go` only
+- Keep format-specific logic in your encoder/decoder files
+- Use the candidate_node style attribute to store style information for round-trip. Ask if this needs to be updated with new styles.
+- Use build tags for optional compilation
+- Add comprehensive tests
+- Run the specific encoder/decoder test (e.g. <format>_test.go) whenever you make ay changes to the encoder_<format> or decoder_<format>
+- Handle errors gracefully
+- Add the no build directive, like the xml encoder and decoder, that enables a minimal yq builds. e.g.  `//go:build !yq_<format>`. Be sure to also update the build_small-yq.sh and build-tinygo-yq.sh to not include the new format.
+
+❌ **DON'T:**
+- Modify `candidate_node.go` to add format-specific logic
+- Add format-specific fields to `CandidateNode`
+- Create special cases in core navigation or evaluation logic
+- Bypass the encoder/decoder interfaces
+- Use candidate_node tag attribute for anything other than indicate the data type
+
+## Examples
+
+Refer to existing format implementations for patterns:
+
+- **Simple encoder/decoder**: `encoder_json.go`, `decoder_json.go`
+- **Complex with preferences**: `encoder_yaml.go`, `decoder_yaml.go`
+- **Encoder-only**: `encoder_sh.go` (ShFormat has nil decoder)
+- **String-only operations**: `encoder_base64.go`, `decoder_base64.go`
+
+## Testing Your Implementation (Mandatory)
+
+Tests must be implemented in `<format>_test.go` following the `formatScenario` pattern:
+
+1. **Create test scenarios** using the `formatScenario` struct with fields:
+   - `description`: Brief description of what's being tested
+   - `input`: Sample input in your format
+   - `expected`: Expected output (typically in YAML for decode tests)
+   - `scenarioType`: Either `"decode"` or `"roundtrip"`
+
+2. **Test coverage must include:**
+   - Basic data types (scalars, arrays, objects/maps)
+   - Nested structures
+   - Edge cases (empty inputs, special characters, escape sequences)
+   - Format-specific features or syntax
+   - Round-trip tests: decode → encode → decode should preserve data
+
+3. **Test function pattern:**
+   - `test<Format>Scenario()`: Helper function that switches on `scenarioType`
+   - `Test<Format>FormatScenarios()`: Main test function that iterates over scenarios
+
+4. **Example from existing formats:**
+   - See `hcl_test.go` for a complete example
+   - See `yaml_test.go` for YAML-specific patterns
+   - See `json_test.go` for more complex scenarios
+
+## Common Patterns
+
+### Format with Indentation
+Use preferences to control output formatting:
+```go
+type <format>Preferences struct {
+    Indent int
+}
+
+func (prefs *<format>Preferences) Copy() <format>Preferences {
+    return *prefs
+}
+```
+
+### Multiple Documents
+Decoders should support reading multiple documents:
+```go
+func (dec *<format>Decoder) Decode() (*CandidateNode, error) {
+    if dec.finished {
+        return nil, io.EOF
+    }
+    // ... decode next document ...
+    if noMoreDocuments {
+        dec.finished = true
+    }
+    return candidate, nil
+}
+```
+
+---
+
+# Adding a New Operator
+
+This guide explains how to add a new operator to yq. Operators are the core of yq's expression language and process `CandidateNode` objects without requiring modifications to `candidate_node.go` itself.
+
+## Overview
+
+Operators transform data by implementing a handler function that processes a `Context` containing `CandidateNode` objects. Each operator is:
+
+1. Defined as an `operationType` in `operation.go`
+2. Registered in the lexer in `lexer_participle.go`
+3. Implemented in its own `operator_<type>.go` file
+4. Tested in `operator_<type>_test.go`
+5. Documented in `pkg/yqlib/doc/operators/headers/<type>.md`
+
+## Architecture
+
+### Key Files
+
+- `pkg/yqlib/operation.go` - Defines `operationType` and operator registry
+- `pkg/yqlib/lexer_participle.go` - Registers operators with their syntax patterns
+- `pkg/yqlib/operator_<type>.go` - Operator implementation
+- `pkg/yqlib/operator_<type>_test.go` - Operator tests using `expressionScenario`
+- `pkg/yqlib/doc/operators/headers/<type>.md` - Documentation header
+
+### Core Types
+
+**operationType:**
+```go
+type operationType struct {
+    Type                 string          // Unique operator name (e.g., "REVERSE")
+    NumArgs              uint            // Number of arguments (0 for no args)
+    Precedence           uint            // Operator precedence (higher = higher precedence)
+    Handler              operatorHandler // The function that executes the operator
+    CheckForPostTraverse bool            // Whether to apply post-traversal logic
+    ToString             func(*Operation) string // Custom string representation
+}
+```
+
+**operatorHandler signature:**
+```go
+type operatorHandler func(*dataTreeNavigator, Context, *ExpressionNode) (Context, error)
+```
+
+**expressionScenario for tests:**
+```go
+type expressionScenario struct {
+    description      string
+    subdescription   string
+    document         string
+    expression       string
+    expected         []string
+    skipDoc          bool
+    expectedError    string
+}
+```
+
+## Step-by-Step: Adding a New Operator
+
+### Step 1: Create the Operator Implementation File
+
+Create `pkg/yqlib/operator_<type>.go` implementing the operator handler function:
+- Implement the `operatorHandler` function signature
+- Process nodes from `context.MatchingNodes`
+- Return a new `Context` with results using `context.ChildContext()`
+- Use `candidate.CreateReplacement()` or `candidate.CreateReplacementWithComments()` to create new nodes
+- Handle errors gracefully with meaningful error messages
+
+See `operator_reverse.go` or `operator_keys.go` for examples.
+
+### Step 2: Register the Operator in operation.go
+
+Add the operator type definition to `pkg/yqlib/operation.go`:
+
+```go
+var <type>OpType = &operationType{
+    Type:       "<TYPE>",          // All caps, matches pattern in lexer
+    NumArgs:    0,                 // 0 for no args, 1+ for args
+    Precedence: 50,                // Typical range: 40-55
+    Handler:    <type>Operator,    // Reference to handler function
+}
+```
+
+**Precedence guidelines:**
+- 10-20: Logical operators (OR, AND, UNION)
+- 30: Pipe operator
+- 40: Assignment and comparison operators
+- 42: Arithmetic operators (ADD, SUBTRACT, MULTIPLY, DIVIDE)
+- 50-52: Most other operators
+- 55: High precedence (e.g., GET_VARIABLE)
+
+**Optional fields:**
+- `CheckForPostTraverse: true` - If your operator can have another directly after it without the pipe character. Most of the time this is false.
+- `ToString: customToString` - Custom string representation (rarely needed)
+
+### Step 3: Register the Operator in lexer_participle.go
+
+Edit `pkg/yqlib/lexer_participle.go` to add the operator to the lexer rules:
+- Use `simpleOp()` for simple keyword patterns
+- Use object syntax for regex patterns or complex syntax
+- Support optional characters with `_?` and aliases with `|`
+
+See existing operators in `lexer_participle.go` for pattern examples.
+
+### Step 4: Create Tests (Mandatory)
+
+Create `pkg/yqlib/operator_<type>_test.go` using the `expressionScenario` pattern:
+- Define test scenarios with `description`, `document`, `expression`, and `expected` fields
+- `expected` is a slice of strings showing output format: `"D<doc>, P[<path>], (<tag>)::<value>\n"`
+- Set `skipDoc: true` for edge cases you don't want in generated documentation
+- Include `subdescription` for longer test names
+- Set `expectedError` if testing error cases
+- Create main test function that iterates over scenarios
+- The main test function should use `documentScenarios` to ensure testcase documentation is generated.
+
+Test coverage must include:
+- Basic data types and nested structures
+- Edge cases (empty inputs, special characters, type errors)
+- Multiple outputs if applicable
+- Format-specific features
+
+See `operator_reverse_test.go` for a simple example and `operator_keys_test.go` for complex cases.
+
+### Step 5: Create Documentation Header
+
+Create `pkg/yqlib/doc/operators/headers/<type>.md`:
+- Use the exact operator name as the title
+- Include a concise 1-2 sentence summary
+- Add additional context or examples if the operator is complex
+
+See existing headers in `doc/operators/headers/` for examples.
+
+## Working with Context and CandidateNode
+
+### Context Management
+- `context.ChildContext(results)` - Create child context with results
+- `context.GetVariable("varName")` - Get variables stored in context
+- `context.SetVariable("varName", value)` - Set variables in context
+
+### CandidateNode Operations
+- `candidate.CreateReplacement(ScalarNode, "!!str", stringValue)` - Create a replacement node
+- `candidate.CreateReplacementWithComments(SequenceNode, "!!seq", candidate.Style)` - With style preserved
+- `candidate.Kind` - The node type (ScalarNode, SequenceNode, MappingNode)
+- `candidate.Tag` - The YAML tag (!!str, !!int, etc.)
+- `candidate.Value` - The scalar value (for ScalarNode only)
+- `candidate.Content` - Child nodes (for SequenceNode and MappingNode)
+- `candidate.guessTagFromCustomType()` - Infer the tag from Go type
+- `candidate.AsList()` - Convert to a list representation
+
+## Key Points
+
+✅ **DO:**
+- Implement the operator handler with the correct signature
+- Register in `operation.go` with appropriate precedence
+- Add the lexer pattern in `lexer_participle.go`
+- Write comprehensive tests covering normal and edge cases
+- Create a documentation header in `doc/operators/headers/`
+- Use `Context.ChildContext()` for proper context threading
+- Handle all node types gracefully
+- Return meaningful error messages
+
+❌ **DON'T:**
+- Modify `candidate_node.go` (operators shouldn't need this)
+- Modify core navigation or evaluation logic
+- Bypass the handler function pattern
+- Add format-specific or operator-specific fields to `CandidateNode`
+- Skip tests or documentation
+
+## Examples
+
+Refer to existing operator implementations for patterns:
+
+- **No-argument operator**: `operator_reverse.go` - Processes arrays/sequences
+- **Single-argument operator**: `operator_map.go` - Takes an expression argument
+- **Complex multi-output**: `operator_keys.go` - Produces multiple results
+- **With preferences**: `operator_to_number.go` - Configuration options
+- **Error handling**: `operator_error.go` - Control flow with errors
+- **String operations**: `operator_strings.go` - Multiple related operators
+
+## Testing Patterns
+
+Refer to existing test files for specific patterns:
+- Basic expression tests in `operator_reverse_test.go`
+- Multi-output tests in `operator_keys_test.go`
+- Error handling tests in `operator_error_test.go`
+- Tests with `skipDoc` flag to exclude from generated documentation
+
+## Common Patterns
+
+Refer to existing operator implementations for these patterns:
+- Simple transformation: see `operator_reverse.go`
+- Type checking: see `operator_error.go`
+- Working with arguments: see `operator_map.go`
+- Post-traversal operators: see `operator_with.go`

cmd/commands_test.go

@@ -1,83 +0,0 @@
-package cmd
-
-// import (
-// 	"strings"
-// 	"testing"
-
-// 	"github.com/mikefarah/yq/v3/test"
-// 	"github.com/spf13/cobra"
-// )
-
-// func getRootCommand() *cobra.Command {
-// 	return New()
-// }
-
-// func TestRootCmd(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-
-// 	if !strings.Contains(result.Output, "Usage:") {
-// 		t.Error("Expected usage message to be printed out, but the usage message was not found.")
-// 	}
-// }
-
-// func TestRootCmd_Help(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "--help")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-
-// 	if !strings.Contains(result.Output, "yq is a lightweight and portable command-line YAML processor. It aims to be the jq or sed of yaml files.") {
-// 		t.Error("Expected usage message to be printed out, but the usage message was not found.")
-// 	}
-// }
-
-// func TestRootCmd_VerboseLong(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "--verbose")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-
-// 	if !verbose {
-// 		t.Error("Expected verbose to be true")
-// 	}
-// }
-
-// func TestRootCmd_VerboseShort(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "-v")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-
-// 	if !verbose {
-// 		t.Error("Expected verbose to be true")
-// 	}
-// }
-
-// func TestRootCmd_VersionShort(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "-V")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-// 	if !strings.Contains(result.Output, "yq version") {
-// 		t.Error("expected version message to be printed out, but the message was not found.")
-// 	}
-// }
-
-// func TestRootCmd_VersionLong(t *testing.T) {
-// 	cmd := getRootCommand()
-// 	result := test.RunCmd(cmd, "--version")
-// 	if result.Error != nil {
-// 		t.Error(result.Error)
-// 	}
-// 	if !strings.Contains(result.Output, "yq version") {
-// 		t.Error("expected version message to be printed out, but the message was not found.")
-// 	}
-// }

cmd/completion.go

@@ -7,19 +7,20 @@ import (
 )
 
 var completionCmd = &cobra.Command{
-	Use:   "shell-completion [bash|zsh|fish|powershell]",
-	Short: "Generate completion script",
+	Use:     "completion [bash|zsh|fish|powershell]",
+	Aliases: []string{"shell-completion"},
+	Short:   "Generate the autocompletion script for the specified shell",
 	Long: `To load completions:
 
 Bash:
 
-$ source <(yq shell-completion bash)
+$ source <(yq completion bash)
 
 # To load completions for each session, execute once:
 Linux:
-  $ yq shell-completion bash > /etc/bash_completion.d/yq
+  $ yq completion bash > /etc/bash_completion.d/yq
 MacOS:
-  $ yq shell-completion bash > /usr/local/etc/bash_completion.d/yq
+  $ yq completion bash > /usr/local/etc/bash_completion.d/yq
 
 Zsh:
 
@@ -29,25 +30,25 @@ Zsh:
 $ echo "autoload -U compinit; compinit" >> ~/.zshrc
 
 # To load completions for each session, execute once:
-$ yq shell-completion zsh > "${fpath[1]}/_yq"
+$ yq completion zsh > "${fpath[1]}/_yq"
 
 # You will need to start a new shell for this setup to take effect.
 
 Fish:
 
-$ yq shell-completion fish | source
+$ yq completion fish | source
 
 # To load completions for each session, execute once:
-$ yq shell-completion fish > ~/.config/fish/completions/yq.fish
+$ yq completion fish > ~/.config/fish/completions/yq.fish
 `,
 	DisableFlagsInUseLine: true,
 	ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
-	Args:                  cobra.ExactValidArgs(1),
+	Args:                  cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	RunE: func(cmd *cobra.Command, args []string) error {
 		var err error = nil
 		switch args[0] {
 		case "bash":
-			err = cmd.Root().GenBashCompletion(os.Stdout)
+			err = cmd.Root().GenBashCompletionV2(os.Stdout, true)
 		case "zsh":
 			err = cmd.Root().GenZshCompletion(os.Stdout)
 		case "fish":

cmd/constant.go

@@ -1,18 +1,39 @@
 package cmd
 
-var unwrapScalar = true
+var unwrapScalarFlag = newUnwrapFlag()
+
+var printNodeInfo = false
+
+var unwrapScalar = false
 
 var writeInplace = false
 var outputToJSON = false
 
+var outputFormat = ""
+
+var inputFormat = ""
+
 var exitStatus = false
-var forceColor = false
-var forceNoColor = false
-var colorsEnabled = false
 var indent = 2
 var noDocSeparators = false
 var nullInput = false
+var nulSepOutput = false
 var verbose = false
 var version = false
+var prettyPrint = false
+
+var forceColor = false
+var forceNoColor = false
+var colorsEnabled = false
+
+// can be either "" (off), "extract" or "process"
+var frontMatter = ""
+
+var splitFileExp = ""
+var splitFileExpFile = ""
 
 var completedSuccessfully = false
+
+var forceExpression = ""
+
+var expressionFile = ""

cmd/evaluate_all_command.go

@@ -2,8 +2,6 @@ package cmd
 
 import (
 	"errors"
-	"fmt"
-	"os"
 
 	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
@@ -14,70 +12,125 @@ func createEvaluateAllCommand() *cobra.Command {
 		Use:     "eval-all [expression] [yaml_file1]...",
 		Aliases: []string{"ea"},
 		Short:   "Loads _all_ yaml documents of _all_ yaml files and runs expression once",
+		ValidArgsFunction: func(_ *cobra.Command, args []string, _ string) ([]string, cobra.ShellCompDirective) {
+			if len(args) == 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			return nil, cobra.ShellCompDirectiveDefault
+		},
 		Example: `
-# merges f2.yml into f1.yml (inplace)
-yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml f2.yml		
+# Merge f2.yml into f1.yml (in place)
+yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml f2.yml
+## the same command and expression using shortened names:
+yq ea -i 'select(fi == 0) * select(fi == 1)' f1.yml f2.yml
+
+
+# Merge all given files
+yq ea '. as $item ireduce ({}; . * $item )' file1.yml file2.yml ...
+
+# Pipe from STDIN
+## use '-' as a filename to pipe from STDIN
+cat file2.yml | yq ea '.a.b' file1.yml - file3.yml
+`,
+		Long: `yq is a portable command-line data file processor (https://github.com/mikefarah/yq/) 
+See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.
+
+## Evaluate All ##
+This command loads _all_ yaml documents of _all_ yaml files and runs expression once
+Useful when you need to run an expression across several yaml documents or files (like merge).
+Note that it consumes more memory than eval.
 `,
-		Long: "Evaluate All:\nUseful when you need to run an expression across several yaml documents or files. Consumes more memory than eval",
 		RunE: evaluateAll,
 	}
 	return cmdEvalAll
 }
-func evaluateAll(cmd *cobra.Command, args []string) error {
-	cmd.SilenceUsage = true
+func evaluateAll(cmd *cobra.Command, args []string) (cmdError error) {
 	// 0 args, read std in
 	// 1 arg, null input, process expression
 	// 1 arg, read file in sequence
 	// 2+ args, [0] = expression, file the rest
 
 	var err error
-	stat, _ := os.Stdin.Stat()
-	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
+
+	expression, args, err := initCommand(cmd, args)
+	if err != nil {
+		return err
+	}
 
 	out := cmd.OutOrStdout()
 
-	fileInfo, _ := os.Stdout.Stat()
-
-	if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
-		colorsEnabled = true
-	}
-
-	if writeInplace && len(args) < 2 {
-		return fmt.Errorf("Write inplace flag only applicable when giving an expression and at least one file")
-	}
-
 	if writeInplace {
-		// only use colors if its forced
+		// only use colours if its forced
 		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[1])
+		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[0])
 		out, err = writeInPlaceHandler.CreateTempFile()
 		if err != nil {
 			return err
 		}
 		// need to indirectly call the function so  that completedSuccessfully is
 		// passed when we finish execution as opposed to now
-		defer func() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
+		defer func() {
+			if cmdError == nil {
+				cmdError = writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully)
+			}
+		}()
 	}
 
-	printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
+	format, err := yqlib.FormatFromString(outputFormat)
+	if err != nil {
+		return err
+	}
+
+	decoder, err := configureDecoder(true)
+	if err != nil {
+		return err
+	}
+
+	printerWriter, err := configurePrinterWriter(format, out)
+	if err != nil {
+		return err
+	}
+	encoder, err := configureEncoder()
+	if err != nil {
+		return err
+	}
+
+	printer := yqlib.NewPrinter(encoder, printerWriter)
+	if nulSepOutput {
+		printer.SetNulSepOutput(true)
+	}
+
+	if frontMatter != "" {
+		originalFilename := args[0]
+		frontMatterHandler := yqlib.NewFrontMatterHandler(args[0])
+		err = frontMatterHandler.Split()
+		if err != nil {
+			return err
+		}
+		args[0] = frontMatterHandler.GetYamlFrontMatterFilename()
+		yqlib.SetFilenameAlias(args[0], originalFilename)
+		defer yqlib.ClearFilenameAliases()
+
+		if frontMatter == "process" {
+			reader := frontMatterHandler.GetContentReader()
+			printer.SetAppendix(reader)
+			defer yqlib.SafelyCloseReader(reader)
+		}
+		defer frontMatterHandler.CleanUp()
+	}
 
 	allAtOnceEvaluator := yqlib.NewAllAtOnceEvaluator()
+
 	switch len(args) {
 	case 0:
-		if pipingStdIn {
-			err = allAtOnceEvaluator.EvaluateFiles("", []string{"-"}, printer)
+		if nullInput {
+			err = yqlib.NewStreamEvaluator().EvaluateNew(processExpression(expression), printer)
 		} else {
 			cmd.Println(cmd.UsageString())
 			return nil
 		}
-	case 1:
-		if nullInput {
-			err = yqlib.NewStreamEvaluator().EvaluateNew(args[0], printer)
-		} else {
-			err = allAtOnceEvaluator.EvaluateFiles("", []string{args[0]}, printer)
-		}
 	default:
-		err = allAtOnceEvaluator.EvaluateFiles(args[0], args[1:], printer)
+		err = allAtOnceEvaluator.EvaluateFiles(processExpression(expression), args, printer, decoder)
 	}
 
 	completedSuccessfully = err == nil

cmd/evaluate_all_command_test.go

@@ -0,0 +1,329 @@
+package cmd
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestCreateEvaluateAllCommand(t *testing.T) {
+	cmd := createEvaluateAllCommand()
+
+	if cmd == nil {
+		t.Fatal("createEvaluateAllCommand returned nil")
+		return
+	}
+
+	// Test basic command properties
+	if cmd.Use != "eval-all [expression] [yaml_file1]..." {
+		t.Errorf("Expected Use to be 'eval-all [expression] [yaml_file1]...', got %q", cmd.Use)
+	}
+
+	if cmd.Short == "" {
+		t.Error("Expected Short description to be non-empty")
+	}
+
+	if cmd.Long == "" {
+		t.Error("Expected Long description to be non-empty")
+	}
+
+	// Test aliases
+	expectedAliases := []string{"ea"}
+	if len(cmd.Aliases) != len(expectedAliases) {
+		t.Errorf("Expected %d aliases, got %d", len(expectedAliases), len(cmd.Aliases))
+	}
+
+	for i, expected := range expectedAliases {
+		if i >= len(cmd.Aliases) || cmd.Aliases[i] != expected {
+			t.Errorf("Expected alias %d to be %q, got %q", i, expected, cmd.Aliases[i])
+		}
+	}
+}
+
+func TestEvaluateAll_NoArgs(t *testing.T) {
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with no arguments and no null input
+	nullInput = false
+	defer func() { nullInput = false }()
+
+	err := evaluateAll(cmd, []string{})
+
+	// Should not error, but should print usage
+	if err != nil {
+		t.Errorf("evaluateAll with no args should not error, got: %v", err)
+	}
+
+	// Should have printed usage information
+	if output.Len() == 0 {
+		t.Error("Expected usage information to be printed")
+	}
+}
+
+func TestEvaluateAll_NullInput(t *testing.T) {
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with null input
+	nullInput = true
+	defer func() { nullInput = false }()
+
+	err := evaluateAll(cmd, []string{})
+
+	// Should not error when using null input
+	if err != nil {
+		t.Errorf("evaluateAll with null input should not error, got: %v", err)
+	}
+}
+
+func TestEvaluateAll_WithSingleFile(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with a single file
+	err = evaluateAll(cmd, []string{yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with single file should not error, got: %v", err)
+	}
+
+	// Should have some output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateAll with single file")
+	}
+}
+
+func TestEvaluateAll_WithMultipleFiles(t *testing.T) {
+	// Create temporary YAML files
+	tempDir := t.TempDir()
+
+	yamlFile1 := filepath.Join(tempDir, "test1.yaml")
+	yamlContent1 := []byte("name: test1\nage: 25\n")
+	err := os.WriteFile(yamlFile1, yamlContent1, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file 1: %v", err)
+	}
+
+	yamlFile2 := filepath.Join(tempDir, "test2.yaml")
+	yamlContent2 := []byte("name: test2\nage: 30\n")
+	err = os.WriteFile(yamlFile2, yamlContent2, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file 2: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with multiple files
+	err = evaluateAll(cmd, []string{yamlFile1, yamlFile2})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with multiple files should not error, got: %v", err)
+	}
+
+	// Should have output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateAll with multiple files")
+	}
+}
+
+func TestEvaluateAll_WithExpression(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with expression
+	err = evaluateAll(cmd, []string{".name", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with expression should not error, got: %v", err)
+	}
+
+	// Should have output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateAll with expression")
+	}
+}
+
+func TestEvaluateAll_WriteInPlace(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Enable write in place
+	originalWriteInplace := writeInplace
+	writeInplace = true
+	defer func() { writeInplace = originalWriteInplace }()
+
+	// Test with write in place
+	err = evaluateAll(cmd, []string{".name = \"updated\"", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with write in place should not error, got: %v", err)
+	}
+
+	// Verify the file was updated
+	updatedContent, err := os.ReadFile(yamlFile)
+	if err != nil {
+		t.Fatalf("Failed to read updated file: %v", err)
+	}
+
+	// Should contain the updated content
+	if !strings.Contains(string(updatedContent), "updated") {
+		t.Errorf("Expected file to contain 'updated', got: %s", string(updatedContent))
+	}
+}
+
+func TestEvaluateAll_ExitStatus(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Enable exit status
+	originalExitStatus := exitStatus
+	exitStatus = true
+	defer func() { exitStatus = originalExitStatus }()
+
+	// Test with expression that should find no matches
+	err = evaluateAll(cmd, []string{".nonexistent", yamlFile})
+
+	// Should error when no matches found and exit status is enabled
+	if err == nil {
+		t.Error("Expected error when no matches found and exit status is enabled")
+	}
+}
+
+func TestEvaluateAll_WithMultipleDocuments(t *testing.T) {
+	// Create a temporary YAML file with multiple documents
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("---\nname: doc1\nage: 25\n---\nname: doc2\nage: 30\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with multiple documents
+	err = evaluateAll(cmd, []string{".", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with multiple documents should not error, got: %v", err)
+	}
+
+	// Should have output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateAll with multiple documents")
+	}
+}
+
+func TestEvaluateAll_NulSepOutput(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateAllCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Enable nul separator output
+	originalNulSepOutput := nulSepOutput
+	nulSepOutput = true
+	defer func() { nulSepOutput = originalNulSepOutput }()
+
+	// Test with nul separator output
+	err = evaluateAll(cmd, []string{".name", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateAll with nul separator output should not error, got: %v", err)
+	}
+
+	// Should have output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateAll with nul separator output")
+	}
+}

cmd/evaluate_sequence_command.go

@@ -0,0 +1,161 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/mikefarah/yq/v4/pkg/yqlib"
+	"github.com/spf13/cobra"
+)
+
+func createEvaluateSequenceCommand() *cobra.Command {
+	var cmdEvalSequence = &cobra.Command{
+		Use:     "eval [expression] [yaml_file1]...",
+		Aliases: []string{"e"},
+		Short:   "(default) Apply the expression to each document in each yaml file in sequence",
+		ValidArgsFunction: func(_ *cobra.Command, args []string, _ string) ([]string, cobra.ShellCompDirective) {
+			if len(args) == 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			return nil, cobra.ShellCompDirectiveDefault
+		},
+		Example: `
+# Reads field under the given path for each file
+yq e '.a.b' f1.yml f2.yml 
+
+# Prints out the file
+yq e sample.yaml 
+
+# Pipe from STDIN
+## use '-' as a filename to pipe from STDIN
+cat file2.yml | yq e '.a.b' file1.yml - file3.yml
+
+# Creates a new yaml document
+## Note that editing an empty file does not work.
+yq e -n '.a.b.c = "cat"' 
+
+# Update a file in place
+yq e '.a.b = "cool"' -i file.yaml 
+`,
+		Long: `yq is a portable command-line data file processor (https://github.com/mikefarah/yq/) 
+See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.
+
+## Evaluate Sequence ##
+This command iterates over each yaml document from each given file, applies the 
+expression and prints the result in sequence.`,
+		RunE: evaluateSequence,
+	}
+	return cmdEvalSequence
+}
+
+func processExpression(expression string) string {
+
+	if prettyPrint && expression == "" {
+		return yqlib.PrettyPrintExp
+	} else if prettyPrint {
+		return fmt.Sprintf("%v | %v", expression, yqlib.PrettyPrintExp)
+	}
+	return expression
+}
+
+func evaluateSequence(cmd *cobra.Command, args []string) (cmdError error) {
+	// 0 args, read std in
+	// 1 arg, null input, process expression
+	// 1 arg, read file in sequence
+	// 2+ args, [0] = expression, file the rest
+
+	out := cmd.OutOrStdout()
+
+	var err error
+
+	expression, args, err := initCommand(cmd, args)
+	if err != nil {
+		return err
+	}
+
+	if writeInplace {
+		// only use colours if its forced
+		colorsEnabled = forceColor
+		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[0])
+		out, err = writeInPlaceHandler.CreateTempFile()
+		if err != nil {
+			return err
+		}
+		// need to indirectly call the function so  that completedSuccessfully is
+		// passed when we finish execution as opposed to now
+		defer func() {
+			if cmdError == nil {
+				cmdError = writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully)
+			}
+		}()
+	}
+
+	format, err := yqlib.FormatFromString(outputFormat)
+	if err != nil {
+		return err
+	}
+
+	printerWriter, err := configurePrinterWriter(format, out)
+	if err != nil {
+		return err
+	}
+	encoder, err := configureEncoder()
+	if err != nil {
+		return err
+	}
+
+	printer := yqlib.NewPrinter(encoder, printerWriter)
+
+	if printNodeInfo {
+		printer = yqlib.NewNodeInfoPrinter(printerWriter)
+	}
+
+	if nulSepOutput {
+		printer.SetNulSepOutput(true)
+	}
+
+	decoder, err := configureDecoder(false)
+	if err != nil {
+		return err
+	}
+	streamEvaluator := yqlib.NewStreamEvaluator()
+
+	if frontMatter != "" {
+		yqlib.GetLogger().Debug("using front matter handler")
+		originalFilename := args[0]
+		frontMatterHandler := yqlib.NewFrontMatterHandler(args[0])
+		err = frontMatterHandler.Split()
+		if err != nil {
+			return err
+		}
+		args[0] = frontMatterHandler.GetYamlFrontMatterFilename()
+		yqlib.SetFilenameAlias(args[0], originalFilename)
+		defer yqlib.ClearFilenameAliases()
+
+		if frontMatter == "process" {
+			reader := frontMatterHandler.GetContentReader()
+			printer.SetAppendix(reader)
+			defer yqlib.SafelyCloseReader(reader)
+		}
+		defer frontMatterHandler.CleanUp()
+	}
+
+	switch len(args) {
+	case 0:
+		if nullInput {
+			err = streamEvaluator.EvaluateNew(processExpression(expression), printer)
+		} else {
+			cmd.Println(cmd.UsageString())
+			return nil
+		}
+	default:
+		err = streamEvaluator.EvaluateFiles(processExpression(expression), args, printer, decoder)
+	}
+	completedSuccessfully = err == nil
+
+	if err == nil && exitStatus && !printer.PrintedAnything() {
+		return errors.New("no matches found")
+	}
+
+	return err
+}

cmd/evaluate_sequence_command_test.go

@@ -0,0 +1,277 @@
+package cmd
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestCreateEvaluateSequenceCommand(t *testing.T) {
+	cmd := createEvaluateSequenceCommand()
+
+	if cmd == nil {
+		t.Fatal("createEvaluateSequenceCommand returned nil")
+		return
+	}
+
+	// Test basic command properties
+	if cmd.Use != "eval [expression] [yaml_file1]..." {
+		t.Errorf("Expected Use to be 'eval [expression] [yaml_file1]...', got %q", cmd.Use)
+	}
+
+	if cmd.Short == "" {
+		t.Error("Expected Short description to be non-empty")
+	}
+
+	if cmd.Long == "" {
+		t.Error("Expected Long description to be non-empty")
+	}
+
+	// Test aliases
+	expectedAliases := []string{"e"}
+	if len(cmd.Aliases) != len(expectedAliases) {
+		t.Errorf("Expected %d aliases, got %d", len(expectedAliases), len(cmd.Aliases))
+	}
+
+	for i, expected := range expectedAliases {
+		if i >= len(cmd.Aliases) || cmd.Aliases[i] != expected {
+			t.Errorf("Expected alias %d to be %q, got %q", i, expected, cmd.Aliases[i])
+		}
+	}
+}
+
+func TestProcessExpression(t *testing.T) {
+	// Reset global variables
+	originalPrettyPrint := prettyPrint
+	defer func() { prettyPrint = originalPrettyPrint }()
+
+	tests := []struct {
+		name        string
+		prettyPrint bool
+		expression  string
+		expected    string
+	}{
+		{
+			name:        "empty expression without pretty print",
+			prettyPrint: false,
+			expression:  "",
+			expected:    "",
+		},
+		{
+			name:        "empty expression with pretty print",
+			prettyPrint: true,
+			expression:  "",
+			expected:    `(... | (select(tag != "!!str"), select(tag == "!!str") | select(test("(?i)^(y|yes|n|no|on|off)$") | not))  ) style=""`,
+		},
+		{
+			name:        "simple expression without pretty print",
+			prettyPrint: false,
+			expression:  ".a.b",
+			expected:    ".a.b",
+		},
+		{
+			name:        "simple expression with pretty print",
+			prettyPrint: true,
+			expression:  ".a.b",
+			expected:    `.a.b | (... | (select(tag != "!!str"), select(tag == "!!str") | select(test("(?i)^(y|yes|n|no|on|off)$") | not))  ) style=""`,
+		},
+		{
+			name:        "complex expression with pretty print",
+			prettyPrint: true,
+			expression:  ".items[] | select(.active == true)",
+			expected:    `.items[] | select(.active == true) | (... | (select(tag != "!!str"), select(tag == "!!str") | select(test("(?i)^(y|yes|n|no|on|off)$") | not))  ) style=""`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			prettyPrint = tt.prettyPrint
+			result := processExpression(tt.expression)
+			if result != tt.expected {
+				t.Errorf("processExpression(%q) = %q, want %q", tt.expression, result, tt.expected)
+			}
+		})
+	}
+}
+
+func TestEvaluateSequence_NoArgs(t *testing.T) {
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with no arguments and no null input
+	nullInput = false
+	defer func() { nullInput = false }()
+
+	err := evaluateSequence(cmd, []string{})
+
+	// Should not error, but should print usage
+	if err != nil {
+		t.Errorf("evaluateSequence with no args should not error, got: %v", err)
+	}
+
+	// Should have printed usage information
+	if output.Len() == 0 {
+		t.Error("Expected usage information to be printed")
+	}
+}
+
+func TestEvaluateSequence_NullInput(t *testing.T) {
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with null input
+	nullInput = true
+	defer func() { nullInput = false }()
+
+	err := evaluateSequence(cmd, []string{})
+
+	// Should not error when using null input
+	if err != nil {
+		t.Errorf("evaluateSequence with null input should not error, got: %v", err)
+	}
+}
+
+func TestEvaluateSequence_WithFile(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with a file
+	err = evaluateSequence(cmd, []string{yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateSequence with file should not error, got: %v", err)
+	}
+
+	// Should have some output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateSequence with file")
+	}
+}
+
+func TestEvaluateSequence_WithExpressionAndFile(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Test with expression and file
+	err = evaluateSequence(cmd, []string{".name", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateSequence with expression and file should not error, got: %v", err)
+	}
+
+	// Should have output
+	if output.Len() == 0 {
+		t.Error("Expected output from evaluateSequence with expression and file")
+	}
+}
+
+func TestEvaluateSequence_WriteInPlace(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Enable write in place
+	originalWriteInplace := writeInplace
+	writeInplace = true
+	defer func() { writeInplace = originalWriteInplace }()
+
+	// Test with write in place
+	err = evaluateSequence(cmd, []string{".name = \"updated\"", yamlFile})
+
+	// Should not error
+	if err != nil {
+		t.Errorf("evaluateSequence with write in place should not error, got: %v", err)
+	}
+
+	// Verify the file was updated
+	updatedContent, err := os.ReadFile(yamlFile)
+	if err != nil {
+		t.Fatalf("Failed to read updated file: %v", err)
+	}
+
+	// Should contain the updated content
+	if !strings.Contains(string(updatedContent), "updated") {
+		t.Errorf("Expected file to contain 'updated', got: %s", string(updatedContent))
+	}
+}
+
+func TestEvaluateSequence_ExitStatus(t *testing.T) {
+	// Create a temporary YAML file
+	tempDir := t.TempDir()
+	yamlFile := filepath.Join(tempDir, "test.yaml")
+	yamlContent := []byte("name: test\nage: 25\n")
+	err := os.WriteFile(yamlFile, yamlContent, 0600)
+	if err != nil {
+		t.Fatalf("Failed to create test YAML file: %v", err)
+	}
+
+	// Create a temporary command
+	cmd := createEvaluateSequenceCommand()
+
+	// Set up command to capture output
+	var output bytes.Buffer
+	cmd.SetOut(&output)
+
+	// Enable exit status
+	originalExitStatus := exitStatus
+	exitStatus = true
+	defer func() { exitStatus = originalExitStatus }()
+
+	// Test with expression that should find no matches
+	err = evaluateSequence(cmd, []string{".nonexistent", yamlFile})
+
+	// Should error when no matches found and exit status is enabled
+	if err == nil {
+		t.Error("Expected error when no matches found and exit status is enabled")
+	}
+}

cmd/evalute_sequence_command.go

@@ -1,100 +0,0 @@
-package cmd
-
-import (
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/mikefarah/yq/v4/pkg/yqlib"
-	"github.com/spf13/cobra"
-)
-
-func createEvaluateSequenceCommand() *cobra.Command {
-	var cmdEvalSequence = &cobra.Command{
-		Use:     "eval [expression] [yaml_file1]...",
-		Aliases: []string{"e"},
-		Short:   "Apply expression to each document in each yaml file given in sequence",
-		Example: `
-# runs the expression against each file, in series
-yq e '.a.b | length' f1.yml f2.yml 
-
-# prints out the file
-yq e sample.yaml 
-
-# prints a new yaml document
-yq e -n '.a.b.c = "cat"' 
-
-
-# updates file.yaml directly
-yq e '.a.b = "cool"' -i file.yaml 
-`,
-		Long: "Evaluate Sequence:\nIterate over each yaml document, apply the expression and print the results, in sequence.",
-		RunE: evaluateSequence,
-	}
-	return cmdEvalSequence
-}
-func evaluateSequence(cmd *cobra.Command, args []string) error {
-	cmd.SilenceUsage = true
-	// 0 args, read std in
-	// 1 arg, null input, process expression
-	// 1 arg, read file in sequence
-	// 2+ args, [0] = expression, file the rest
-
-	var err error
-	stat, _ := os.Stdin.Stat()
-	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
-
-	out := cmd.OutOrStdout()
-
-	fileInfo, _ := os.Stdout.Stat()
-
-	if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
-		colorsEnabled = true
-	}
-
-	if writeInplace && len(args) < 2 {
-		return fmt.Errorf("Write inplace flag only applicable when giving an expression and at least one file")
-	}
-
-	if writeInplace {
-		// only use colors if its forced
-		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[1])
-		out, err = writeInPlaceHandler.CreateTempFile()
-		if err != nil {
-			return err
-		}
-		// need to indirectly call the function so  that completedSuccessfully is
-		// passed when we finish execution as opposed to now
-		defer func() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
-	}
-
-	printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
-
-	streamEvaluator := yqlib.NewStreamEvaluator()
-
-	switch len(args) {
-	case 0:
-		if pipingStdIn {
-			err = streamEvaluator.EvaluateFiles("", []string{"-"}, printer)
-		} else {
-			cmd.Println(cmd.UsageString())
-			return nil
-		}
-	case 1:
-		if nullInput {
-			err = streamEvaluator.EvaluateNew(args[0], printer)
-		} else {
-			err = streamEvaluator.EvaluateFiles("", []string{args[0]}, printer)
-		}
-	default:
-		err = streamEvaluator.EvaluateFiles(args[0], args[1:], printer)
-	}
-	completedSuccessfully = err == nil
-
-	if err == nil && exitStatus && !printer.PrintedAnything() {
-		return errors.New("no matches found")
-	}
-
-	return err
-}

cmd/root.go

@@ -1,57 +1,219 @@
 package cmd
 
 import (
+	"fmt"
+	"log/slog"
 	"os"
+	"strings"
 
+	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
-	logging "gopkg.in/op/go-logging.v1"
 )
 
+type runeValue rune
+
+func newRuneVar(p *rune) *runeValue {
+	return (*runeValue)(p)
+}
+
+func (r *runeValue) String() string {
+	return string(*r)
+}
+
+func (r *runeValue) Set(rawVal string) error {
+	val := strings.ReplaceAll(rawVal, "\\n", "\n")
+	val = strings.ReplaceAll(val, "\\t", "\t")
+	val = strings.ReplaceAll(val, "\\r", "\r")
+	val = strings.ReplaceAll(val, "\\f", "\f")
+	val = strings.ReplaceAll(val, "\\v", "\v")
+	if len(val) != 1 {
+		return fmt.Errorf("[%v] is not a valid character. Must be length 1 was %v", val, len(val))
+	}
+	*r = runeValue(rune(val[0]))
+	return nil
+}
+
+func (r *runeValue) Type() string {
+	return "char"
+}
+
 func New() *cobra.Command {
 	var rootCmd = &cobra.Command{
 		Use:   "yq",
-		Short: "yq is a lightweight and portable command-line YAML processor.",
-		Long:  `yq is a lightweight and portable command-line YAML processor. It aims to be the jq or sed of yaml files.`,
+		Short: "yq is a lightweight and portable command-line data file processor.",
+		Long: `yq is a portable command-line data file processor (https://github.com/mikefarah/yq/) 
+See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.`,
+		Example: `
+# yq tries to auto-detect the file format based off the extension, and defaults to YAML if it's unknown (or piping through STDIN)
+# Use the '-p/--input-format' flag to specify a format type.
+cat file.xml | yq -p xml
+
+# read the "stuff" node from "myfile.yml"
+yq '.stuff' < myfile.yml
+
+# update myfile.yml in place
+yq -i '.stuff = "foo"' myfile.yml
+
+# print contents of sample.json as idiomatic YAML
+yq -P -oy sample.json
+`,
+
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if version {
 				cmd.Print(GetVersionDisplay())
 				return nil
 			}
-			cmd.Println(cmd.UsageString())
-			return nil
+			return evaluateSequence(cmd, args)
 
 		},
-		PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
 			cmd.SetOut(cmd.OutOrStdout())
-			var format = logging.MustStringFormatter(
-				`%{color}%{time:15:04:05} %{shortfunc} [%{level:.4s}]%{color:reset} %{message}`,
-			)
-			var backend = logging.AddModuleLevel(
-				logging.NewBackendFormatter(logging.NewLogBackend(os.Stderr, "", 0), format))
 
+			// when NO_COLOR environment variable presents and not an empty string the coloured output should be disabled;
+			// refer to no-color.org
+			forceNoColor = forceNoColor || os.Getenv("NO_COLOR") != ""
+
+			level := slog.LevelWarn
 			if verbose {
-				backend.SetLevel(logging.DEBUG, "")
-			} else {
-				backend.SetLevel(logging.ERROR, "")
+				level = slog.LevelDebug
 			}
 
-			logging.SetBackend(backend)
+			yqlib.GetLogger().SetLevel(level)
+			opts := &slog.HandlerOptions{Level: level, AddSource: verbose}
+			handler := slog.NewTextHandler(os.Stderr, opts)
+			yqlib.GetLogger().SetSlogger(slog.New(handler))
+
+			yqlib.InitExpressionParser()
+
+			return nil
 		},
 	}
 
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
-	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "output as json. Set indent to 0 to print json in one line.")
-	rootCmd.PersistentFlags().BoolVarP(&nullInput, "null-input", "n", false, "Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.")
+	rootCmd.PersistentFlags().BoolVarP(&printNodeInfo, "debug-node-info", "", false, "debug node info")
+
+	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "(deprecated) output as json. Set indent to 0 to print json in one line.")
+	err := rootCmd.PersistentFlags().MarkDeprecated("tojson", "please use -o=json instead")
+	if err != nil {
+		panic(err)
+	}
+
+	rootCmd.PersistentFlags().StringVarP(&outputFormat, "output-format", "o", "auto", fmt.Sprintf("[auto|a|%v] output format type.", yqlib.GetAvailableOutputFormatString()))
+	var outputCompletions = []string{"auto"}
+	for _, formats := range yqlib.GetAvailableOutputFormats() {
+		outputCompletions = append(outputCompletions, formats.FormalName)
+	}
+
+	if err = rootCmd.RegisterFlagCompletionFunc("output-format", cobra.FixedCompletions(outputCompletions, cobra.ShellCompDirectiveNoFileComp)); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVarP(&inputFormat, "input-format", "p", "auto", fmt.Sprintf("[auto|a|%v] parse format for input.", yqlib.GetAvailableInputFormatString()))
+
+	var inputCompletions = []string{"auto"}
+	for _, formats := range yqlib.GetAvailableInputFormats() {
+		inputCompletions = append(inputCompletions, formats.FormalName)
+	}
+
+	if err = rootCmd.RegisterFlagCompletionFunc("input-format", cobra.FixedCompletions(inputCompletions, cobra.ShellCompDirectiveNoFileComp)); err != nil {
+		panic(err)
+	}
+
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredXMLPreferences.AttributePrefix, "xml-attribute-prefix", yqlib.ConfiguredXMLPreferences.AttributePrefix, "prefix for xml attributes")
+	if err = rootCmd.RegisterFlagCompletionFunc("xml-attribute-prefix", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredXMLPreferences.ContentName, "xml-content-name", yqlib.ConfiguredXMLPreferences.ContentName, "name for xml content (if no attribute name is present).")
+	if err = rootCmd.RegisterFlagCompletionFunc("xml-content-name", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredXMLPreferences.StrictMode, "xml-strict-mode", yqlib.ConfiguredXMLPreferences.StrictMode, "enables strict parsing of XML. See https://pkg.go.dev/encoding/xml for more details.")
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredXMLPreferences.KeepNamespace, "xml-keep-namespace", yqlib.ConfiguredXMLPreferences.KeepNamespace, "enables keeping namespace after parsing attributes")
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredXMLPreferences.UseRawToken, "xml-raw-token", yqlib.ConfiguredXMLPreferences.UseRawToken, "enables using RawToken method instead Token. Commonly disables namespace translations. See https://pkg.go.dev/encoding/xml#Decoder.RawToken for details.")
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredXMLPreferences.ProcInstPrefix, "xml-proc-inst-prefix", yqlib.ConfiguredXMLPreferences.ProcInstPrefix, "prefix for xml processing instructions (e.g. <?xml version=\"1\"?>)")
+	if err = rootCmd.RegisterFlagCompletionFunc("xml-proc-inst-prefix", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredXMLPreferences.DirectiveName, "xml-directive-name", yqlib.ConfiguredXMLPreferences.DirectiveName, "name for xml directives (e.g. <!DOCTYPE thing cat>)")
+	if err = rootCmd.RegisterFlagCompletionFunc("xml-directive-name", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredXMLPreferences.SkipProcInst, "xml-skip-proc-inst", yqlib.ConfiguredXMLPreferences.SkipProcInst, "skip over process instructions (e.g. <?xml version=\"1\"?>)")
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredXMLPreferences.SkipDirectives, "xml-skip-directives", yqlib.ConfiguredXMLPreferences.SkipDirectives, "skip over directives (e.g. <!DOCTYPE thing cat>)")
+
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredCsvPreferences.AutoParse, "csv-auto-parse", yqlib.ConfiguredCsvPreferences.AutoParse, "parse CSV YAML/JSON values")
+	rootCmd.PersistentFlags().Var(newRuneVar(&yqlib.ConfiguredCsvPreferences.Separator), "csv-separator", "CSV Separator character")
+
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredTsvPreferences.AutoParse, "tsv-auto-parse", yqlib.ConfiguredTsvPreferences.AutoParse, "parse TSV YAML/JSON values")
+
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredLuaPreferences.DocPrefix, "lua-prefix", yqlib.ConfiguredLuaPreferences.DocPrefix, "prefix")
+	if err = rootCmd.RegisterFlagCompletionFunc("lua-prefix", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredLuaPreferences.DocSuffix, "lua-suffix", yqlib.ConfiguredLuaPreferences.DocSuffix, "suffix")
+	if err = rootCmd.RegisterFlagCompletionFunc("lua-suffix", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredLuaPreferences.UnquotedKeys, "lua-unquoted", yqlib.ConfiguredLuaPreferences.UnquotedKeys, "output unquoted string keys (e.g. {foo=\"bar\"})")
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredLuaPreferences.Globals, "lua-globals", yqlib.ConfiguredLuaPreferences.Globals, "output keys as top-level global variables")
+
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredPropertiesPreferences.KeyValueSeparator, "properties-separator", yqlib.ConfiguredPropertiesPreferences.KeyValueSeparator, "separator to use between keys and values")
+	rootCmd.PersistentFlags().BoolVar(&yqlib.ConfiguredPropertiesPreferences.UseArrayBrackets, "properties-array-brackets", yqlib.ConfiguredPropertiesPreferences.UseArrayBrackets, "use [x] in array paths (e.g. for SpringBoot)")
+
+	rootCmd.PersistentFlags().StringVar(&yqlib.ConfiguredShellVariablesPreferences.KeySeparator, "shell-key-separator", yqlib.ConfiguredShellVariablesPreferences.KeySeparator, "separator for shell variable key paths")
+	if err = rootCmd.RegisterFlagCompletionFunc("shell-key-separator", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+
+	rootCmd.PersistentFlags().BoolVar(&yqlib.StringInterpolationEnabled, "string-interpolation", yqlib.StringInterpolationEnabled, "Toggles strings interpolation of \\(exp)")
+
+	rootCmd.PersistentFlags().BoolVarP(&nullInput, "null-input", "n", false, "Don't read input, simply evaluate the expression given. Useful for creating docs from scratch.")
 	rootCmd.PersistentFlags().BoolVarP(&noDocSeparators, "no-doc", "N", false, "Don't print document separators (---)")
 
 	rootCmd.PersistentFlags().IntVarP(&indent, "indent", "I", 2, "sets indent level for output")
+	if err = rootCmd.RegisterFlagCompletionFunc("indent", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
 	rootCmd.Flags().BoolVarP(&version, "version", "V", false, "Print version information and quit")
-	rootCmd.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the yaml file inplace of first yaml file given.")
-	rootCmd.PersistentFlags().BoolVarP(&unwrapScalar, "unwrapScalar", "", true, "unwrap scalar, print the value with no quotes, colors or comments")
+	rootCmd.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the file in place of first file given.")
+	rootCmd.PersistentFlags().VarP(unwrapScalarFlag, "unwrapScalar", "r", "unwrap scalar, print the value with no quotes, colours or comments. Defaults to true for yaml")
+	rootCmd.PersistentFlags().Lookup("unwrapScalar").NoOptDefVal = "true"
+	rootCmd.PersistentFlags().BoolVarP(&nulSepOutput, "nul-output", "0", false, "Use NUL char to separate values. If unwrap scalar is also set, fail if unwrapped scalar contains NUL char.")
+
+	rootCmd.PersistentFlags().BoolVarP(&prettyPrint, "prettyPrint", "P", false, "pretty print, shorthand for '... style = \"\"'")
 	rootCmd.PersistentFlags().BoolVarP(&exitStatus, "exit-status", "e", false, "set exit status if there are no matches or null or false is returned")
 
 	rootCmd.PersistentFlags().BoolVarP(&forceColor, "colors", "C", false, "force print with colors")
-	rootCmd.PersistentFlags().BoolVarP(&forceNoColor, "no-colors", "M", false, "force print with no colors")
+	rootCmd.PersistentFlags().BoolVarP(&forceNoColor, "no-colors", "M", forceNoColor, "force print with no colors")
+	rootCmd.PersistentFlags().StringVarP(&frontMatter, "front-matter", "f", "", "(extract|process) first input as yaml front-matter. Extract will pull out the yaml content, process will run the expression against the yaml content, leaving the remaining data intact")
+	if err = rootCmd.RegisterFlagCompletionFunc("front-matter", cobra.FixedCompletions([]string{"extract", "process"}, cobra.ShellCompDirectiveNoFileComp)); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVarP(&forceExpression, "expression", "", "", "forcibly set the expression argument. Useful when yq argument detection thinks your expression is a file.")
+	if err = rootCmd.RegisterFlagCompletionFunc("expression", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredYamlPreferences.LeadingContentPreProcessing, "header-preprocess", "", true, "Slurp any header comments and separators before processing expression.")
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredYamlPreferences.FixMergeAnchorToSpec, "yaml-fix-merge-anchor-to-spec", "", false, "Fix merge anchor to match YAML spec. Will default to true in late 2025")
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredYamlPreferences.CompactSequenceIndent, "yaml-compact-seq-indent", "c", false, "Use compact sequence indentation where '- ' is considered part of the indentation.")
+
+	rootCmd.PersistentFlags().StringVarP(&splitFileExp, "split-exp", "s", "", "print each result (or doc) into a file named (exp). [exp] argument must return a string. You can use $index in the expression as the result counter. The necessary directories will be created.")
+	if err = rootCmd.RegisterFlagCompletionFunc("split-exp", cobra.NoFileCompletions); err != nil {
+		panic(err)
+	}
+	rootCmd.PersistentFlags().StringVarP(&splitFileExpFile, "split-exp-file", "", "", "Use a file to specify the split-exp expression.")
+	if err = rootCmd.MarkPersistentFlagFilename("split-exp-file"); err != nil {
+		panic(err)
+	}
+
+	rootCmd.PersistentFlags().StringVarP(&expressionFile, "from-file", "", "", "Load expression from specified file.")
+	if err = rootCmd.MarkPersistentFlagFilename("from-file"); err != nil {
+		panic(err)
+	}
+
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredSecurityPreferences.DisableEnvOps, "security-disable-env-ops", "", false, "Disable env related operations.")
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredSecurityPreferences.DisableFileOps, "security-disable-file-ops", "", false, "Disable file related operations (e.g. load)")
+	rootCmd.PersistentFlags().BoolVarP(&yqlib.ConfiguredSecurityPreferences.EnableSystemOps, "security-enable-system-operator", "", false, "Enable system operator to allow execution of external commands.")
+
 	rootCmd.AddCommand(
 		createEvaluateSequenceCommand(),
 		createEvaluateAllCommand(),

cmd/root_test.go

@@ -0,0 +1,265 @@
+package cmd
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestNewRuneVar(t *testing.T) {
+	var r rune
+	runeVar := newRuneVar(&r)
+
+	if runeVar == nil {
+		t.Fatal("newRuneVar returned nil")
+	}
+}
+
+func TestRuneValue_String(t *testing.T) {
+	tests := []struct {
+		name     string
+		runeVal  rune
+		expected string
+	}{
+		{
+			name:     "simple character",
+			runeVal:  'a',
+			expected: "a",
+		},
+		{
+			name:     "special character",
+			runeVal:  '\n',
+			expected: "\n",
+		},
+		{
+			name:     "unicode character",
+			runeVal:  'ñ',
+			expected: "ñ",
+		},
+		{
+			name:     "zero rune",
+			runeVal:  0,
+			expected: string(rune(0)),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			runeVal := runeValue(tt.runeVal)
+			result := runeVal.String()
+			if result != tt.expected {
+				t.Errorf("runeValue.String() = %q, want %q", result, tt.expected)
+			}
+		})
+	}
+}
+
+func TestRuneValue_Set(t *testing.T) {
+	tests := []struct {
+		name        string
+		input       string
+		expected    rune
+		expectError bool
+	}{
+		{
+			name:        "simple character",
+			input:       "a",
+			expected:    'a',
+			expectError: false,
+		},
+		{
+			name:        "newline escape",
+			input:       "\\n",
+			expected:    '\n',
+			expectError: false,
+		},
+		{
+			name:        "tab escape",
+			input:       "\\t",
+			expected:    '\t',
+			expectError: false,
+		},
+		{
+			name:        "carriage return escape",
+			input:       "\\r",
+			expected:    '\r',
+			expectError: false,
+		},
+		{
+			name:        "form feed escape",
+			input:       "\\f",
+			expected:    '\f',
+			expectError: false,
+		},
+		{
+			name:        "vertical tab escape",
+			input:       "\\v",
+			expected:    '\v',
+			expectError: false,
+		},
+		{
+			name:        "empty string",
+			input:       "",
+			expected:    0,
+			expectError: true,
+		},
+		{
+			name:        "multiple characters",
+			input:       "ab",
+			expected:    0,
+			expectError: true,
+		},
+		{
+			name:        "special character",
+			input:       "ñ",
+			expected:    'ñ',
+			expectError: true, // This will fail because the Set function checks len(val) != 1
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var r rune
+			runeVal := newRuneVar(&r)
+
+			err := runeVal.Set(tt.input)
+
+			if tt.expectError {
+				if err == nil {
+					t.Errorf("Expected error for input %q, but got none", tt.input)
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Unexpected error for input %q: %v", tt.input, err)
+				}
+				if r != tt.expected {
+					t.Errorf("Expected rune %q (%d), got %q (%d)",
+						string(tt.expected), tt.expected, string(r), r)
+				}
+			}
+		})
+	}
+}
+
+func TestRuneValue_Set_ErrorMessages(t *testing.T) {
+	tests := []struct {
+		name          string
+		input         string
+		expectedError string
+	}{
+		{
+			name:          "empty string error",
+			input:         "",
+			expectedError: "[] is not a valid character. Must be length 1 was 0",
+		},
+		{
+			name:          "multiple characters error",
+			input:         "abc",
+			expectedError: "[abc] is not a valid character. Must be length 1 was 3",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var r rune
+			runeVal := newRuneVar(&r)
+
+			err := runeVal.Set(tt.input)
+
+			if err == nil {
+				t.Errorf("Expected error for input %q, but got none", tt.input)
+				return
+			}
+
+			if !strings.Contains(err.Error(), tt.expectedError) {
+				t.Errorf("Expected error message to contain %q, got %q",
+					tt.expectedError, err.Error())
+			}
+		})
+	}
+}
+
+func TestRuneValue_Type(t *testing.T) {
+	var r rune
+	runeVal := newRuneVar(&r)
+
+	result := runeVal.Type()
+	expected := "char"
+
+	if result != expected {
+		t.Errorf("runeValue.Type() = %q, want %q", result, expected)
+	}
+}
+
+func TestNew(t *testing.T) {
+	rootCmd := New()
+
+	if rootCmd == nil {
+		t.Fatal("New() returned nil")
+		return
+	}
+
+	// Test basic command properties
+	if rootCmd.Use != "yq" {
+		t.Errorf("Expected Use to be 'yq', got %q", rootCmd.Use)
+	}
+
+	if rootCmd.Short == "" {
+		t.Error("Expected Short description to be non-empty")
+	}
+
+	if rootCmd.Long == "" {
+		t.Error("Expected Long description to be non-empty")
+	}
+
+	// Test that the command has the expected subcommands
+	expectedCommands := []string{"eval", "eval-all", "completion"}
+	actualCommands := make([]string, 0, len(rootCmd.Commands()))
+
+	for _, cmd := range rootCmd.Commands() {
+		actualCommands = append(actualCommands, cmd.Name())
+	}
+
+	for _, expected := range expectedCommands {
+		found := false
+		for _, actual := range actualCommands {
+			if actual == expected {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Errorf("Expected command %q not found in actual commands: %v",
+				expected, actualCommands)
+		}
+	}
+}
+
+func TestNew_FlagCompletions(t *testing.T) {
+	rootCmd := New()
+
+	// Test that flag completion functions are registered
+	// This is a basic smoke test - we can't easily test the actual completion logic
+	// without more complex setup
+	flags := []string{
+		"output-format",
+		"input-format",
+		"xml-attribute-prefix",
+		"xml-content-name",
+		"xml-proc-inst-prefix",
+		"xml-directive-name",
+		"lua-prefix",
+		"lua-suffix",
+		"properties-separator",
+		"indent",
+		"front-matter",
+		"expression",
+		"split-exp",
+	}
+
+	for _, flagName := range flags {
+		flag := rootCmd.PersistentFlags().Lookup(flagName)
+		if flag == nil {
+			t.Errorf("Expected flag %q to exist", flagName)
+		}
+	}
+}

cmd/unwrap_flag.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"strconv"
+
+	"github.com/spf13/pflag"
+)
+
+type boolFlag interface {
+	pflag.Value
+	IsExplicitlySet() bool
+	IsSet() bool
+}
+
+type unwrapScalarFlagStrc struct {
+	explicitlySet bool
+	value         bool
+}
+
+func newUnwrapFlag() boolFlag {
+	return &unwrapScalarFlagStrc{value: true}
+}
+
+func (f *unwrapScalarFlagStrc) IsExplicitlySet() bool {
+	return f.explicitlySet
+}
+
+func (f *unwrapScalarFlagStrc) IsSet() bool {
+	return f.value
+}
+
+func (f *unwrapScalarFlagStrc) String() string {
+	return strconv.FormatBool(f.value)
+}
+
+func (f *unwrapScalarFlagStrc) Set(value string) error {
+
+	v, err := strconv.ParseBool(value)
+	f.value = v
+	f.explicitlySet = true
+	return err
+}
+
+func (*unwrapScalarFlagStrc) Type() string {
+	return "bool"
+}

cmd/utils.go

@@ -0,0 +1,304 @@
+package cmd
+
+import (
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"strings"
+
+	"github.com/mikefarah/yq/v4/pkg/yqlib"
+	"github.com/spf13/cobra"
+)
+
+func isAutomaticOutputFormat() bool {
+	return outputFormat == "" || outputFormat == "auto" || outputFormat == "a"
+}
+
+func initCommand(cmd *cobra.Command, args []string) (string, []string, error) {
+	cmd.SilenceUsage = true
+
+	setupColors()
+
+	expression, args, err := processArgs(args)
+	if err != nil {
+		return "", nil, err
+	}
+
+	if err := loadSplitFileExpression(); err != nil {
+		return "", nil, err
+	}
+
+	handleBackwardsCompatibility()
+
+	if err := validateCommandFlags(args); err != nil {
+		return "", nil, err
+	}
+
+	if err := configureFormats(args); err != nil {
+		return "", nil, err
+	}
+
+	configureUnwrapScalar()
+
+	return expression, args, nil
+}
+
+func setupColors() {
+	fileInfo, _ := os.Stdout.Stat()
+
+	if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
+		colorsEnabled = true
+	}
+}
+
+func loadSplitFileExpression() error {
+	if splitFileExpFile != "" {
+		splitExpressionBytes, err := os.ReadFile(splitFileExpFile)
+		if err != nil {
+			return err
+		}
+		splitFileExp = string(splitExpressionBytes)
+	}
+	return nil
+}
+
+func handleBackwardsCompatibility() {
+	// backwards compatibility
+	if outputToJSON {
+		outputFormat = "json"
+	}
+}
+
+func validateCommandFlags(args []string) error {
+	if writeInplace && (len(args) == 0 || args[0] == "-") {
+		return fmt.Errorf("write in place flag only applicable when giving an expression and at least one file")
+	}
+
+	if frontMatter != "" && len(args) == 0 {
+		return fmt.Errorf("front matter flag only applicable when giving an expression and at least one file")
+	}
+
+	if writeInplace && splitFileExp != "" {
+		return fmt.Errorf("write in place cannot be used with split file")
+	}
+
+	if nullInput && len(args) > 0 {
+		return fmt.Errorf("cannot pass files in when using null-input flag")
+	}
+
+	return nil
+}
+
+func configureFormats(args []string) error {
+	inputFilename := ""
+	if len(args) > 0 {
+		inputFilename = args[0]
+	}
+
+	if err := configureInputFormat(inputFilename); err != nil {
+		return err
+	}
+
+	if err := configureOutputFormat(); err != nil {
+		return err
+	}
+
+	yqlib.GetLogger().Debugf("Using input format %v", inputFormat)
+	yqlib.GetLogger().Debugf("Using output format %v", outputFormat)
+
+	return nil
+}
+
+func configureInputFormat(inputFilename string) error {
+	if inputFormat == "" || inputFormat == "auto" || inputFormat == "a" {
+		inputFormat = yqlib.FormatStringFromFilename(inputFilename)
+
+		_, err := yqlib.FormatFromString(inputFormat)
+		if err != nil {
+			// unknown file type, default to yaml
+			yqlib.GetLogger().Debugf("Unknown file format extension '%v', defaulting to yaml", inputFormat)
+			inputFormat = "yaml"
+			if isAutomaticOutputFormat() {
+				outputFormat = "yaml"
+			}
+		} else if isAutomaticOutputFormat() {
+			outputFormat = inputFormat
+		}
+	} else if isAutomaticOutputFormat() {
+		// backwards compatibility -
+		// before this was introduced, `yq -pcsv things.csv`
+		// would produce *yaml* output.
+		//
+		outputFormat = yqlib.FormatStringFromFilename(inputFilename)
+		if inputFilename != "-" {
+			yqlib.GetLogger().Warningf("yq default output is now 'auto' (based on the filename extension). Normally yq would output '%v', but for backwards compatibility 'yaml' has been set. Please use -oy to specify yaml, or drop the -p flag.", outputFormat)
+		}
+		outputFormat = "yaml"
+	}
+	return nil
+}
+
+func configureOutputFormat() error {
+	outputFormatType, err := yqlib.FormatFromString(outputFormat)
+	if err != nil {
+		return err
+	}
+
+	if outputFormatType == yqlib.YamlFormat ||
+		outputFormatType == yqlib.PropertiesFormat {
+		unwrapScalar = true
+	}
+
+	return nil
+}
+
+func configureUnwrapScalar() {
+	if unwrapScalarFlag.IsExplicitlySet() {
+		unwrapScalar = unwrapScalarFlag.IsSet()
+	}
+}
+
+func configureDecoder(evaluateTogether bool) (yqlib.Decoder, error) {
+	format, err := yqlib.FormatFromString(inputFormat)
+	if err != nil {
+		return nil, err
+	}
+	yqlib.ConfiguredYamlPreferences.EvaluateTogether = evaluateTogether
+
+	if format.DecoderFactory == nil {
+		return nil, fmt.Errorf("no support for %s input format", inputFormat)
+	}
+	yqlibDecoder := format.DecoderFactory()
+	if yqlibDecoder == nil {
+		return nil, fmt.Errorf("no support for %s input format", inputFormat)
+	}
+	return yqlibDecoder, nil
+}
+
+func configurePrinterWriter(format *yqlib.Format, out io.Writer) (yqlib.PrinterWriter, error) {
+
+	var printerWriter yqlib.PrinterWriter
+
+	if splitFileExp != "" {
+		colorsEnabled = forceColor
+		splitExp, err := yqlib.ExpressionParser.ParseExpression(splitFileExp)
+		if err != nil {
+			return nil, fmt.Errorf("bad split document expression: %w", err)
+		}
+		printerWriter = yqlib.NewMultiPrinterWriter(splitExp, format)
+	} else {
+		printerWriter = yqlib.NewSinglePrinterWriter(out)
+	}
+	return printerWriter, nil
+}
+
+func configureEncoder() (yqlib.Encoder, error) {
+	yqlibOutputFormat, err := yqlib.FormatFromString(outputFormat)
+	if err != nil {
+		return nil, err
+	}
+	yqlib.ConfiguredXMLPreferences.Indent = indent
+	yqlib.ConfiguredYamlPreferences.Indent = indent
+	yqlib.ConfiguredKYamlPreferences.Indent = indent
+	yqlib.ConfiguredJSONPreferences.Indent = indent
+
+	yqlib.ConfiguredYamlPreferences.UnwrapScalar = unwrapScalar
+	yqlib.ConfiguredKYamlPreferences.UnwrapScalar = unwrapScalar
+	yqlib.ConfiguredPropertiesPreferences.UnwrapScalar = unwrapScalar
+	yqlib.ConfiguredJSONPreferences.UnwrapScalar = unwrapScalar
+	yqlib.ConfiguredShellVariablesPreferences.UnwrapScalar = unwrapScalar
+
+	yqlib.ConfiguredYamlPreferences.ColorsEnabled = colorsEnabled
+	yqlib.ConfiguredKYamlPreferences.ColorsEnabled = colorsEnabled
+	yqlib.ConfiguredJSONPreferences.ColorsEnabled = colorsEnabled
+	yqlib.ConfiguredHclPreferences.ColorsEnabled = colorsEnabled
+	yqlib.ConfiguredTomlPreferences.ColorsEnabled = colorsEnabled
+
+	yqlib.ConfiguredYamlPreferences.PrintDocSeparators = !noDocSeparators
+	yqlib.ConfiguredKYamlPreferences.PrintDocSeparators = !noDocSeparators
+
+	encoder := yqlibOutputFormat.EncoderFactory()
+
+	if encoder == nil {
+		return nil, fmt.Errorf("no support for %s output format", outputFormat)
+	}
+	return encoder, err
+}
+
+// this is a hack to enable backwards compatibility with githubactions (which pipe /dev/null into everything)
+// and being able to call yq with the filename as a single parameter
+//
+// without this - yq detects there is stdin (thanks githubactions),
+// then tries to parse the filename as an expression
+func maybeFile(str string) bool {
+	yqlib.GetLogger().Debugf("checking '%v' is a file", str)
+	stat, err := os.Stat(str) // #nosec
+	result := err == nil && !stat.IsDir()
+	if yqlib.GetLogger().IsEnabledFor(slog.LevelDebug) {
+		if err != nil {
+			yqlib.GetLogger().Debugf("error: %v", err)
+		} else {
+			yqlib.GetLogger().Debugf("error: %v, dir: %v", err, stat.IsDir())
+		}
+		yqlib.GetLogger().Debugf("result: %v", result)
+	}
+	return result
+}
+
+func processStdInArgs(args []string) []string {
+	stat, err := os.Stdin.Stat()
+	if err != nil {
+		yqlib.GetLogger().Debugf("error getting stdin: %v", err)
+	}
+	pipingStdin := stat != nil && (stat.Mode()&os.ModeCharDevice) == 0
+
+	// if we've been given a file, don't automatically
+	// read from stdin.
+	// this happens if there is more than one argument
+	// or only one argument and its a file
+	if nullInput || !pipingStdin || len(args) > 1 || (len(args) > 0 && maybeFile(args[0])) {
+		return args
+	}
+
+	for _, arg := range args {
+		if arg == "-" {
+			return args
+		}
+	}
+	yqlib.GetLogger().Debugf("missing '-', adding it to the end")
+
+	// we're piping from stdin, but there's no '-' arg
+	// lets add one to the end
+	return append(args, "-")
+}
+
+func processArgs(originalArgs []string) (string, []string, error) {
+	expression := forceExpression
+	args := processStdInArgs(originalArgs)
+	maybeFirstArgIsAFile := len(args) > 0 && maybeFile(args[0])
+
+	if expressionFile == "" && maybeFirstArgIsAFile && strings.HasSuffix(args[0], ".yq") {
+		// lets check if an expression file was given
+		yqlib.GetLogger().Debugf("Assuming arg %v is an expression file", args[0])
+		expressionFile = args[0]
+		args = args[1:]
+	}
+
+	if expressionFile != "" {
+		expressionBytes, err := os.ReadFile(expressionFile)
+		if err != nil {
+			return "", nil, err
+		}
+		//replace \r\n (windows) with good ol' unix file endings.
+		expression = strings.ReplaceAll(string(expressionBytes), "\r\n", "\n")
+	}
+
+	yqlib.GetLogger().Debugf("processed args: %v", args)
+	if expression == "" && len(args) > 0 && args[0] != "-" && !maybeFile(args[0]) {
+		yqlib.GetLogger().Debugf("assuming expression is '%v'", args[0])
+		expression = args[0]
+		args = args[1:]
+	}
+	return expression, args, nil
+}

cmd/version.go

@@ -11,7 +11,7 @@ var (
 	GitDescribe string
 
 	// Version is main version number that is being run at the moment.
-	Version = "4.1.0"
+	Version = "v4.53.1"
 
 	// VersionPrerelease is a pre-release marker for the version. If this is "" (empty string)
 	// then it means that it is a final release. Otherwise, this is a pre-release
@@ -25,7 +25,7 @@ const ProductName = "yq"
 // GetVersionDisplay composes the parts of the version in a way that's suitable
 // for displaying to humans.
 func GetVersionDisplay() string {
-	return fmt.Sprintf("%s version %s\n", ProductName, getHumanVersion())
+	return fmt.Sprintf("yq (https://github.com/mikefarah/yq/) version %s\n", getHumanVersion())
 }
 
 func getHumanVersion() string {
@@ -45,5 +45,5 @@ func getHumanVersion() string {
 	}
 
 	// Strip off any single quotes added by the git information.
-	return strings.Replace(version, "'", "", -1)
+	return strings.ReplaceAll(version, "'", "")
 }

cmd/version_test.go

@@ -1,9 +1,12 @@
 package cmd
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func TestGetVersionDisplay(t *testing.T) {
-	var expectedVersion = ProductName + " version " + Version
+	var expectedVersion = ProductName + " (https://github.com/mikefarah/yq/) version " + Version
 	if VersionPrerelease != "" {
 		expectedVersion = expectedVersion + "-" + VersionPrerelease
 	}
@@ -25,6 +28,18 @@ func TestGetVersionDisplay(t *testing.T) {
 }
 
 func Test_getHumanVersion(t *testing.T) {
+	// Save original values
+	origGitDescribe := GitDescribe
+	origGitCommit := GitCommit
+	origVersionPrerelease := VersionPrerelease
+
+	// Restore after test
+	defer func() {
+		GitDescribe = origGitDescribe
+		GitCommit = origGitCommit
+		VersionPrerelease = origVersionPrerelease
+	}()
+
 	GitDescribe = "e42813d"
 	GitCommit = "e42813d+CHANGES"
 	var wanted string
@@ -49,3 +64,118 @@ func Test_getHumanVersion(t *testing.T) {
 		}
 	}
 }
+
+func Test_getHumanVersion_NoGitDescribe(t *testing.T) {
+	// Save original values
+	origGitDescribe := GitDescribe
+	origGitCommit := GitCommit
+	origVersionPrerelease := VersionPrerelease
+
+	// Restore after test
+	defer func() {
+		GitDescribe = origGitDescribe
+		GitCommit = origGitCommit
+		VersionPrerelease = origVersionPrerelease
+	}()
+
+	GitDescribe = ""
+	GitCommit = ""
+	VersionPrerelease = ""
+
+	got := getHumanVersion()
+	if got != Version {
+		t.Errorf("getHumanVersion() = %v, want %v", got, Version)
+	}
+}
+
+func Test_getHumanVersion_WithPrerelease(t *testing.T) {
+	// Save original values
+	origGitDescribe := GitDescribe
+	origGitCommit := GitCommit
+	origVersionPrerelease := VersionPrerelease
+
+	// Restore after test
+	defer func() {
+		GitDescribe = origGitDescribe
+		GitCommit = origGitCommit
+		VersionPrerelease = origVersionPrerelease
+	}()
+
+	GitDescribe = ""
+	GitCommit = "abc123"
+	VersionPrerelease = "beta"
+
+	got := getHumanVersion()
+	expected := Version + "-beta (abc123)"
+	if got != expected {
+		t.Errorf("getHumanVersion() = %v, want %v", got, expected)
+	}
+}
+
+func Test_getHumanVersion_PrereleaseInVersion(t *testing.T) {
+	// Save original values
+	origGitDescribe := GitDescribe
+	origGitCommit := GitCommit
+	origVersionPrerelease := VersionPrerelease
+
+	// Restore after test
+	defer func() {
+		GitDescribe = origGitDescribe
+		GitCommit = origGitCommit
+		VersionPrerelease = origVersionPrerelease
+	}()
+
+	GitDescribe = "v1.2.3-rc1"
+	GitCommit = "xyz789"
+	VersionPrerelease = "rc1"
+
+	got := getHumanVersion()
+	// Should not duplicate "rc1" since it's already in GitDescribe
+	expected := "v1.2.3-rc1 (xyz789)"
+	if got != expected {
+		t.Errorf("getHumanVersion() = %v, want %v", got, expected)
+	}
+}
+
+func Test_getHumanVersion_StripSingleQuotes(t *testing.T) {
+	// Save original values
+	origGitDescribe := GitDescribe
+	origGitCommit := GitCommit
+	origVersionPrerelease := VersionPrerelease
+
+	// Restore after test
+	defer func() {
+		GitDescribe = origGitDescribe
+		GitCommit = origGitCommit
+		VersionPrerelease = origVersionPrerelease
+	}()
+
+	GitDescribe = "'v1.2.3'"
+	GitCommit = "'commit123'"
+	VersionPrerelease = ""
+
+	got := getHumanVersion()
+	// Should strip single quotes
+	if strings.Contains(got, "'") {
+		t.Errorf("getHumanVersion() = %v, should not contain single quotes", got)
+	}
+	expected := "v1.2.3"
+	if got != expected {
+		t.Errorf("getHumanVersion() = %v, want %v", got, expected)
+	}
+}
+
+func TestProductName(t *testing.T) {
+	if ProductName != "yq" {
+		t.Errorf("ProductName = %v, want yq", ProductName)
+	}
+}
+
+func TestVersionIsSet(t *testing.T) {
+	if Version == "" {
+		t.Error("Version should not be empty")
+	}
+	if !strings.HasPrefix(Version, "v") {
+		t.Errorf("Version %v should start with 'v'", Version)
+	}
+}

cspell.config.yaml

@@ -0,0 +1,14 @@
+---
+$schema: https://raw.githubusercontent.com/streetsidesoftware/cspell/main/cspell.schema.json
+version: '0.2'
+language: en-GB
+dictionaryDefinitions:
+  - name: project-words
+    path: './project-words.txt'
+    addWords: true
+dictionaries:
+  - project-words
+ignorePaths:
+  - 'vendor'
+  - 'bin'
+  - '/project-words.txt'

debian/changelog

@@ -1,76 +0,0 @@
-yq (3.3.2) focal; urgency=medium
-
-  * Bug fix: existStatus bug (#459)
-  * Automatically makes a os temp directory if it does not exist (#461)
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Fri, 07 Aug 2020 18:53:01 +0200
-
-yq (3.3-0) focal; urgency=medium
-
-  * You can control string styles (quotes) using the new --style flag
-  * String values now always have quotes when outputting to json
-  * Negative array indices now traverse the array backwards
-  * Added a --stripComments flag to print yaml without any comments
-  * Bumped go to version 1.14
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Thu, 30 Apr 2020 20:45:44 +0200
-
-yq (3.1-2) eoan; urgency=medium
-
-  * Bug fix: yq 3 was removing empty inline-style objects and arrays (#355)
-  * Bug fix: Merge option returned different output when switching order of 
-    merging files(#347)
-  * Bug fix: Add new object to existing array object was failing in 3.1.1 (#361)
-  * Bug fix: yq 3 empty keys did not allow merging of values (#356)
-  * Bug fix: keys quoted during merge (#363)
-  * Bug fix: Correct length with wc -l (#362)
-  * Bug fix: Write to empty document removed path (#359)
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Mon, 24 Feb 2020 20:31:58 +0100
-
-yq (3.1-1) eoan; urgency=medium
-
-  * Keeps yaml comments and formatting, can specify yaml tags when updating.
-  * Handles anchors
-  * Can print out matching paths and values when splatting
-  * JSON output works for all commands
-  * Yaml files with multiple documents are printed out as one JSON 
-    document per line.
-  * Deep splat (**) to match arbitrary paths
-  * Update scripts file format has changed to be more powerful
-  * Reading and splatting, matching results are printed once per line
-  * Bugfixing
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Tue, 11 Feb 2020 22:18:24 +0100
-
-yq (2.2-1) bionic; urgency=medium
-
-  * Added Windows support for the "--inplace" command flag
-  * Prefix now supports arrays
-  * Add prefix command
-  * Bump Alpine version to 3.8
-  * Improved docker build process
-  * Lint fixes
-  * Build support for all linux architectures supported by gox
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Sat, 19 Jan 2019 15:50:47 +0100
-
-yq (2.1-0) bionic; urgency=medium
-
-  * Ability to read multiple documents in a single file
-  * Ability to append list items instead of overwriting
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Tue, 10 Jul 2018 14:02:42 +0200
-
-yq (2.0-0) bionic; urgency=medium
-
-  * Release 2.0.0
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Wed, 20 Jun 2018 10:29:53 +0200
-
-yq (1.15-0) bionic; urgency=medium
-
-  * Release 1.15
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Wed, 06 Jun 2018 11:32:03 +0200
-

debian/compat

@@ -1 +0,0 @@
-10

debian/control

@@ -1,22 +0,0 @@
-Source: yq
-Section: devel
-Priority: optional
-Maintainer: Roberto Mier Escandón <rmescandon@gmail.com>
-Build-Depends: debhelper (>=10),
-               dh-golang (>=1.34),
-               golang-1.13,
-               rsync
-Standards-Version: 4.1.4
-Homepage: https://github.com/mikefarah/yq.git
-Vcs-Browser: https://github.com/mikefarah/yq.git
-Vcs-Git: https://github.com/mikefarah/yq.git
-XS-Go-Import-Path: github.com/mikefarah/yq
-XSBC-Original-Maintainer: Roberto Mier Escandón <rmescandon@gmail.com>
-
-Package: yq
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: lightweight and portable command-line YAML processor
- .
- The aim of the project is to be the 
- [jq](https://github.com/stedolan/jq) or sed of yaml files.

debian/copyright

@@ -1,24 +0,0 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: yq
-Source: https://github.com/mikefarah/yq.git
-
-Files: *
-Copyright: 2017 Mike Farah
-License: Expat
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-    .
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-    .
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.

debian/gbp.conf

@@ -1,2 +0,0 @@
-[DEFAULT]
-pristine-tar = True

debian/rules

@@ -1,57 +0,0 @@
-#!/usr/bin/make -f
-#
-# Copyright (C) 2018 Roberto Mier Escandón <rmescandon@gmail.com>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 3 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-PROJECT := yq
-OWNER := mikefarah
-REPO := github.com
-GOVERSION := 1.13
-
-export DH_OPTIONS
-export DH_GOPKG := ${REPO}/${OWNER}/${PROJECT}
-export GOROOT := /usr/lib/go-${GOVERSION}
-export GOPATH := ${CURDIR}/_build
-export GOBIN := ${GOPATH}/bin
-export PATH := ${GOROOT}/bin:${GOBIN}:${PATH}
-export GOCACHE := /tmp/gocache
-export GOFLAGS := -mod=vendor
-
-SRCDIR := ${GOPATH}/src/${DH_GOPKG}
-DESTDIR := ${CURDIR}/debian/${PROJECT}
-BINDIR := /usr/bin
-ASSETSDIR := /usr/share/${PROJECT}
-
-%:
-	dh $@ --builddirectory=${GOPATH} --buildsystem=golang
-
-override_dh_auto_build:
-	mkdir -p ${SRCDIR}
-	mkdir -p ${GOBIN}
-	# copy project to local srcdir to build from there
-	rsync -avz --progress --exclude=_build --exclude=debian --exclude=tmp. --exclude=go.mod --exclude=docs . $(SRCDIR)
-	# build go code
-	(cd ${SRCDIR} && go install -buildmode=pie ./...)
-	
-override_dh_auto_test:
-	(cd ${SRCDIR} && go test -v ./...)
-
-override_dh_auto_install:
-	cp ${GOBIN}/yq ${DESTDIR}/${BINDIR}
-	cp -f ${SRCDIR}/LICENSE ${DESTDIR}/${ASSETSDIR}
-	chmod a+x ${DESTDIR}/${BINDIR}/yq
-
-override_dh_auto_clean:
-	dh_clean
-	rm -rf ${CURDIR}/_build

debian/source/format

@@ -1 +0,0 @@
-3.0 (native)

debian/yq.dirs

@@ -1,3 +0,0 @@
-usr/bin
-usr/share/yq
-usr/share/man/man1

examples/array.yaml

@@ -1,11 +1,2 @@
----
-- become: true
-  gather_facts: false
-  hosts: lalaland
-  name: "Apply smth"
-  roles:
-    - lala
-    - land
-  serial: 1
-- become: false
-  gather_facts: true
+- [cat, dog, frog, cow]
+- [apple, banana, grape, mango]

examples/base64.txt

@@ -0,0 +1 @@
+bXkgc2VjcmV0IGNoaWxsaSByZWNpcGUgaXMuLi4u

examples/data.lua

@@ -0,0 +1,9 @@
+return {
+	["country"] = "Australia"; -- this place
+	["cities"] = {
+		"Sydney",
+		"Melbourne",
+		"Brisbane",
+		"Perth",
+	};
+};

examples/data1.yaml

@@ -1,4 +1 @@
-a: simple # just the best
-b: [1, 2]
-c:
-  test: 1
+a: apple

examples/data2.yaml

@@ -1,7 +1,5 @@
-a: other # better than the original
-b: [3, 4]
-c:
-  toast: leave
-  test: 1
-  tell: 1
-  tasty.taco: cool
+# --------------------------------------------------
+# It's a test with comment
+# --------------------------------------------------
+groups:
+  - name: d

examples/empty.yaml

@@ -1,2 +1 @@
-# a: apple
-# b: cat
+# comment

examples/environment.yq

@@ -0,0 +1,5 @@
+#! yq
+.[] |(
+    ( select(kind == "scalar") | key + "='" + . + "'"),
+    ( select(kind == "seq") | key + "=(" + (map("'" + . + "'") | join(",")) + ")")
+)

examples/example.properties

@@ -0,0 +1,6 @@
+# comments on values appear
+person.name = Mike
+
+# comments on array values appear
+person.pets.0 = cat
+person.food.0 = pizza

examples/front-matter.yaml

@@ -0,0 +1,6 @@
+---
+a: apple
+b: banana
+---
+hello there
+apples: great

examples/kyaml.kyaml

@@ -0,0 +1,10 @@
+# leading
+{
+  a: 1, # a line
+  # head b
+  b: 2,
+  c: [
+    # head d
+    "d", # d line
+  ],
+}

examples/kyaml.yml

@@ -0,0 +1,7 @@
+# leading
+a: 1 # a line
+# head b
+b: 2
+c:
+  # head d
+  - d # d line

examples/leading-separator.yaml

@@ -0,0 +1,2 @@
+---
+a: test

examples/mike.xml

@@ -0,0 +1 @@
+<zoo><thing><frog>boing</frog></thing></zoo>

examples/mike2.xml

@@ -0,0 +1,11 @@
+  <?xml version="1.0" encoding="UTF-8"?>
+  <!-- osm-->
+  <osm version="0.6" generator="CGImap 0.0.2">
+  <!-- bounds-->
+   <bounds minlat="54.0889580" minlon="12.2487570" maxlat="54.0913900" maxlon="12.2524800">
+   <!-- great -->
+   cool
+   </bounds>
+   <foo>ba2234r</foo>
+   <foo>bar2234233</foo>
+  </osm>

examples/sample.hcl

@@ -0,0 +1,8 @@
+# Arithmetic with literals and application-provided variables
+sum = 1 + addend
+
+# String interpolation and templates
+message = "Hello, ${name}!"
+
+# Application-provided functions
+shouty_message = upper(message)

examples/sample.ini

@@ -0,0 +1,14 @@
+
+; This is a INI document
+
+[owner]
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+
+[database]
+db_host = "localhost"
+db_port = 5432
+db_user = "postgres"
+db_password = ""
+db_name = "postgres"
+

examples/sample.tf

@@ -0,0 +1,27 @@
+# main.tf
+
+# Define required providers and minimum Terraform version
+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 5.0"
+    }
+  }
+  required_version = ">= 1.2"
+}
+
+# Configure the AWS provider
+provider "aws" {
+  region = var.aws_region
+}
+
+# Define an S3 bucket resource
+resource "aws_s3_bucket" "example_bucket" {
+  bucket = var.bucket_name
+
+  tags = {
+    Environment = "Development"
+    Project     = "TerraformExample"
+  }
+}

examples/sample.toml

@@ -0,0 +1,26 @@
+
+
+# This is a TOML document
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+
+[database]
+enabled = true
+ports = [ 8000, 8001, 8002 ]
+data = [ ["delta", "phi"], [3.14] ]
+temp_targets = { cpu = 79.5, case = 72.0 }
+
+[servers]
+
+[servers.alpha]
+ip = "10.0.0.1"
+role = "frontend"
+
+[servers.beta]
+ip = "10.0.0.2"
+role = "backend"
+

examples/sample.yaml

@@ -1,11 +1,2 @@
-# Some doc
-
-a: true
-b:
-  c: 2
-  d: [3, 4, 5]
-  e:
-    - name: fred
-      value: 3
-    - name: sam
-      value: 4
+ # things
+a: apple

examples/sample2.hcl

@@ -0,0 +1,8 @@
+# Arithmetic with literals and application-provided variables
+sum = 1 + addend
+
+# String interpolation and templates
+message = "Hello, ${name}!"
+
+# Application-provided functions
+shouty_message = upper(message)

examples/sample_no_sections.ini

@@ -0,0 +1,8 @@
+
+; This is a INI document
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+enabled = true
+ip = "10.0.0.1"
+role = "frontend"
+treads = 4

examples/sample_objects.csv

@@ -0,0 +1,3 @@
+name,numberOfCats,likesApples,height
+,1,true,168.8
+Samantha's Rabbit,2,false,-188.8

examples/small.properties

@@ -0,0 +1 @@
+this.is = a properties file

examples/small.xml

@@ -0,0 +1 @@
+<this>is some xml</this>

examples/small.yaml

@@ -0,0 +1,4 @@
+---
+# comment
+# about things
+a: cat

examples/thing.yml

@@ -0,0 +1,2 @@
+a: apple is included
+b: cool.

github-action/Dockerfile

@@ -1,5 +1,9 @@
-FROM mikefarah/yq:3
+FROM mikefarah/yq:4@sha256:603ebff15eb308a05f1c5b8b7613179cad859aed3ec9fdd04f2ef5d32345950e
 
 COPY entrypoint.sh /entrypoint.sh
 
+# github action recommendation is to run as root.
+# https://docs.github.com/en/actions/creating-actions/dockerfile-support-for-github-actions#user
+USER root
+
 ENTRYPOINT ["/entrypoint.sh"]

github-action/entrypoint.sh

@@ -1,4 +1,12 @@
 #!/bin/sh -l
-
-echo "$1"
-eval $1
+set -e
+echo "::debug::\$cmd: $1"
+RESULT=$(eval "$1")
+echo "::debug::\$RESULT: $RESULT"
+# updating from 
+# https://github.com/orgs/community/discussions/26288#discussioncomment-3876281
+# https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter
+delimiter=$(cat /proc/sys/kernel/random/uuid)
+echo "result<<${delimiter}" >> "${GITHUB_OUTPUT}"
+echo "${RESULT}" >> "${GITHUB_OUTPUT}"
+echo "${delimiter}" >> "${GITHUB_OUTPUT}"

go.mod

@@ -1,18 +1,41 @@
 module github.com/mikefarah/yq/v4
 
 require (
-	github.com/elliotchance/orderedmap v1.3.0
-	github.com/fatih/color v1.9.0
-	github.com/goccy/go-yaml v1.8.1
-	github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a
-	github.com/mattn/go-colorable v0.1.7 // indirect
-	github.com/spf13/cobra v1.1.1
-	github.com/timtadh/data-structures v0.5.3 // indirect
-	github.com/timtadh/lexmachine v0.2.2
-	golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473
-	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776
+	github.com/a8m/envsubst v1.4.3
+	github.com/alecthomas/participle/v2 v2.1.4
+	github.com/alecthomas/repr v0.5.2
+	github.com/dimchansky/utfbom v1.1.1
+	github.com/elliotchance/orderedmap v1.8.0
+	github.com/fatih/color v1.19.0
+	github.com/go-ini/ini v1.67.0
+	github.com/goccy/go-json v0.10.6
+	github.com/goccy/go-yaml v1.19.2
+	github.com/hashicorp/hcl/v2 v2.24.0
+	github.com/jinzhu/copier v0.4.0
+	github.com/magiconair/properties v1.8.10
+	github.com/pelletier/go-toml/v2 v2.3.0
+	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e
+	github.com/spf13/cobra v1.10.2
+	github.com/spf13/pflag v1.0.10
+	github.com/yuin/gopher-lua v1.1.2
+	github.com/zclconf/go-cty v1.18.0
+	go.yaml.in/yaml/v4 v4.0.0-rc.4
+	golang.org/x/mod v0.34.0
+	golang.org/x/net v0.52.0
+	golang.org/x/text v0.35.0
 )
 
-go 1.15
+require (
+	github.com/agext/levenshtein v1.2.1 // indirect
+	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.42.0 // indirect
+	golang.org/x/tools v0.42.0 // indirect
+)
+
+go 1.25.0