Load file acceptance test

.github/ISSUE_TEMPLATE/feature_request.md

@@ -26,7 +26,7 @@ country: Australia
 And we run a command:
 
 ```bash
-yq 'predictWeatherOf(.country)'
+yq eval 'predictWeatherOf(.country)'
 ```
 
 it could output

.github/workflows/codeql.yml

@@ -1,70 +0,0 @@
-# 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'
-
-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@v3
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      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@v2
-
-    # 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@v2

.github/workflows/docker-release.yml

@@ -1,62 +0,0 @@
-name: Release Docker
-
-on:
-  release:
-    types: [released]
-
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-jobs:
-  publishDocker:
-    environment: dockerhub
-    env:
-      IMAGE_NAME: mikefarah/yq
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: all
-
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v2
-        with:
-          version: latest
-
-      - name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }} && docker version
-
-      - 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"
-
-          echo "Building and pushing version ${IMAGE_VERSION} of image ${IMAGE_NAME}"
-          echo '${{ secrets.DOCKER_PASSWORD }}' | docker login -u '${{ secrets.DOCKER_USERNAME }}' --password-stdin
-          docker buildx build \
-            --label "org.opencontainers.image.authors=https://github.com/mikefarah/yq/graphs/contributors" \
-            --label "org.opencontainers.image.created=$(date --rfc-3339=seconds)" \
-            --label "org.opencontainers.image.description=yq is a portable command-line YAML 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" \
-            .

.github/workflows/go.yml

@@ -1,8 +1,5 @@
 name: Build
 on: [push, pull_request]
-permissions:
-  contents: read
-
 jobs:
 
   build:
@@ -10,14 +7,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.18
-      uses: actions/setup-go@v3
+    - name: Set up Go 1.17
+      uses: actions/setup-go@v2
       with:
-        go-version: 1.18
+        go-version: 1.17
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v3
+      uses: actions/checkout@v2
 
     - name: Get dependencies
       run: |
@@ -28,7 +25,6 @@ jobs:
         fi
 
     - name: Check the build
-      shell: bash -l {0}
       run: |
         export PATH=${PATH}:`go env GOPATH`/bin
         scripts/devtools.sh

.github/workflows/release.yml

@@ -3,16 +3,15 @@ on:
   push:
     tags:
       - 'v*'
-      - 'draft-*'
 
 jobs:
   publishGitRelease:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
         with:
-          go-version: '^1.18'
+          go-version: '^1.17.2'
       - name: Compile man page markup
         id: gen-man-page-md
         run: |
@@ -22,7 +21,7 @@ jobs:
       - name: Get the version
         id: get_version
         run: echo ::set-output name=VERSION::${GITHUB_REF##*/}
-
+        
       - name: Generate man page
         uses: docker://pandoc/core:2.14.2
         id: gen-man-page
@@ -36,18 +35,62 @@ jobs:
             --variable=author:"Mike Farah"
             --output=yq.1
             ${{ steps.gen-man-page-md.outputs.man-page-md }}
-
+        
       - name: Cross compile
         run: |
           sudo apt-get install rhash -y
-          go install github.com/mitchellh/gox@v1.0.1
+          go get github.com/mitchellh/gox
           mkdir -p build
           cp yq.1 build/yq.1
           ./scripts/xcompile.sh
 
-      - name: Release
-        uses: softprops/action-gh-release@v1
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1.1.4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          files: build/*
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
           draft: true
-          fail_on_unmatched_files: 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:
+      - uses: actions/checkout@v2
+      
+      - 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 ${{ steps.buildx.outputs.platforms }} && docker version
+ 
+      - name: Build and push image
+        run: |
+          IMAGE_V_VERSION="$(git describe --tags --abbrev=0)"
+          IMAGE_VERSION=${IMAGE_V_VERSION:1}
+
+          SHORT_SHA1=$(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 .
+    

.github/workflows/test-yq.yml

@@ -1,8 +1,5 @@
 name: Test Yq Action
 on: [push]
-permissions:
-  contents: read
-
 jobs:
 
   build:
@@ -10,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v2
       - name: Get test
         uses: mikefarah/yq@master
         with:

.gitignore

@@ -48,8 +48,4 @@ test*.yml
 
 # man page
 man.md
-yq.1
-
-# debian pkg
-_build
-debian/files
+yq.1

.golangci.yml

@@ -1,40 +0,0 @@
-run:
-  timeout: 5m
-linters:
-  enable:
-    - asciicheck
-    - depguard
-    - errorlint
-    - gci
-    - gochecknoinits
-    - gofmt
-    - goimports
-    - gosec
-    - megacheck
-    - misspell
-    - nakedret
-    - nolintlint
-    - predeclared
-    - revive
-    - unconvert
-    - unparam
-linters-settings:
-  depguard:
-    list-type: blacklist
-    include-go-root: true
-    packages:
-      - io/ioutil
-    packages-with-error-message:
-      - io/ioutil: "The 'io/ioutil' package is deprecated. Use corresponding 'os' or 'io' functions instead."
-issues:
-  exclude-rules:
-  - linters:
-    - gosec
-    text:  "Implicit memory aliasing in for loop."
-    path: _test\.go
-  - linters:
-    - revive
-    text: "unexported-return"
-  - linters:
-    - revive
-    text: "var-naming"

1

@@ -0,0 +1 @@
+Error: cannot pass files in when using null-input flag

Dockerfile

@@ -1,8 +1,8 @@
-FROM golang:1.18.3 as builder
+FROM golang:1.17 as builder
 
 WORKDIR /go/src/mikefarah/yq
 
-COPY . .
+COPY . /go/src/mikefarah/yq
 
 RUN CGO_ENABLED=0 go build .
 # RUN ./scripts/test.sh -- this too often times out in the github pipeline.
@@ -11,18 +11,20 @@ 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 as production
-LABEL maintainer="Mike Farah <mikefarah@users.noreply.github.com>"
+
+RUN mkdir /home/yq/
+RUN addgroup -g 1000 yq && \
+    adduser -u 1000 -G yq -s /bin/bash -h /home/yq -D yq
+RUN chown -R yq:yq /home/yq/
 
 COPY --from=builder /go/src/mikefarah/yq/yq /usr/bin/yq
+RUN chmod +x /usr/bin/yq
 
-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
+ARG VERSION=none
+LABEL version=${VERSION}
 
 USER yq
 
+WORKDIR /workdir
+
 ENTRYPOINT ["/usr/bin/yq"]

Dockerfile.dev

@@ -1,4 +1,4 @@
-FROM golang:1.18.3
+FROM golang:1.17
 
 COPY scripts/devtools.sh /opt/devtools.sh
 

LICENSE

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

Makefile

@@ -2,7 +2,6 @@ MAKEFLAGS += --warn-undefined-variables
 SHELL := /bin/bash
 .SHELLFLAGS := -o pipefail -euc
 .DEFAULT_GOAL := install
-ENGINE := $(shell { command -v podman || command -v docker; } 2>/dev/null)
 
 include Makefile.variables
 
@@ -34,7 +33,7 @@ clean:
 
 ## prefix before other make targets to run in your local dev environment
 local: | quiet
-	@$(eval ENGINERUN= )
+	@$(eval DOCKRUN= )
 	@mkdir -p tmp
 	@touch tmp/dev_image_id
 quiet: # this is silly but shuts up 'Nothing to be done for `local`'
@@ -43,9 +42,9 @@ 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
-	@${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
+	@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
 
 # ----------------------------------------------
 # build
@@ -55,61 +54,60 @@ build: build/dev
 .PHONY: build/dev
 build/dev: test *.go
 	@mkdir -p bin/
-	${ENGINERUN} go build --ldflags "$(LDFLAGS)"
-	${ENGINERUN} bash ./scripts/acceptance.sh
+	${DOCKRUN} go build --ldflags "$(LDFLAGS)"
+	${DOCKRUN} bash ./scripts/acceptance.sh
 
 ## Compile the project for multiple OS and Architectures.
 xcompile: check
 	@rm -rf build/
 	@mkdir -p build
-	${ENGINERUN} bash ./scripts/xcompile.sh
+	${DOCKRUN} bash ./scripts/xcompile.sh
 	@find build -type d -exec chmod 755 {} \; || :
 	@find build -type f -exec chmod 755 {} \; || :
 
 .PHONY: install
 install: build
-	${ENGINERUN} go install
+	${DOCKRUN} 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
-	@mkdir -p vendor
-	${ENGINERUN} go mod vendor
+	${DOCKRUN} go mod vendor
 
 # ----------------------------------------------
 # develop and test
 
 .PHONY: format
 format: vendor
-	${ENGINERUN} bash ./scripts/format.sh
+	${DOCKRUN} bash ./scripts/format.sh
 
 
 .PHONY: secure
 secure: format
-	${ENGINERUN} bash ./scripts/secure.sh
+	${DOCKRUN} bash ./scripts/secure.sh
 
 .PHONY: check
 check: secure
-	${ENGINERUN} bash ./scripts/check.sh
+	${DOCKRUN} bash ./scripts/check.sh
 
 
 
 .PHONY: test
 test: check
-	${ENGINERUN} bash ./scripts/test.sh
+	${DOCKRUN} bash ./scripts/test.sh
 
 .PHONY: cover
 cover: check
 	@rm -rf cover/
 	@mkdir -p cover
-	${ENGINERUN} bash ./scripts/coverage.sh
+	${DOCKRUN} bash ./scripts/coverage.sh
 	@find cover -type d -exec chmod 755 {} \; || :
 	@find cover -type f -exec chmod 644 {} \; || :
 
 
 .PHONY: release
 release: xcompile
-	${ENGINERUN} bash ./scripts/publish.sh
+	${DOCKRUN} bash ./scripts/publish.sh
 
 # ----------------------------------------------
 # utilities

Makefile.variables

@@ -29,7 +29,7 @@ endif
 
 DEV_IMAGE := ${PROJECT}_dev
 
-ENGINERUN := ${ENGINE} run --rm \
+DOCKRUN := docker run --rm \
 	-e LDFLAGS="${LDFLAGS}" \
 	-e GITHUB_TOKEN="${GITHUB_TOKEN}" \
 	-v ${ROOT}/vendor:/go/src \

README.md

@@ -1,77 +1,49 @@
 # 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)
+![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)
 
 
-a lightweight and portable command-line YAML, JSON and XML processor. `yq` uses [jq](https://github.com/stedolan/jq) like syntax but works with yaml files as well as json and xml. It doesn't yet support everything `jq` does - but it does support the most common operations and functions, and more is being added continuously.
+a lightweight and portable command-line YAML processor. `yq` uses [jq](https://github.com/stedolan/jq) like syntax but works with yaml files as well as json. It doesn't yet support everything `jq` does - but it does support the most common operations and functions, and more is being added continuously.
 
-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.
-
-## Notice for v4.x versions prior to 4.18.1
-Since 4.18.1, yq's 'eval/e' command is the _default_ command and no longer needs to be specified.
-
-Older versions will still need to specify 'eval/e'.
-
-Similarly, '-' is no longer required as a filename to read from STDIN (unless reading from one or more files).
-
-TLDR:
-
-Prior to 4.18.1 
-```bash
-yq e '.cool' - < file.yaml
-```
-
-4.18+ 
-```bash
-yq '.cool' < file.yaml
-```
-
-When merging multiple files together, `eval-all/ea` is still required to tell `yq` to run the expression against all the document at once.
+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, all listed below.
 
 ## Quick Usage Guide
 
 Read a value:
 ```bash
-yq '.a.b[0].c' file.yaml
+yq e '.a.b[0].c' file.yaml
 ```
 
 Pipe from STDIN:
 ```bash
-yq '.a.b[0].c' < file.yaml
+cat file.yaml | yq e '.a.b[0].c' -
 ```
 
 Update a yaml file, inplace
 ```bash
-yq -i '.a.b[0].c = "cool"' file.yaml
+yq e -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
+NAME=mike yq e -i '.a.b[0].c = strenv(NAME)' file.yaml
 ```
 
 Merge multiple files
-```bash
-# note the use of `ea` to evaluate all the 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 '
+yq e -i '
   .a.b[0].c = "cool" |
   .x.y.z = "foobar" |
   .person.name = strenv(NAME)
 ' file.yaml
 ```
 
-Convert JSON to YAML
-```bash
-yq -P sample.json
-```
-
-See the [documentation](https://mikefarah.gitbook.io/yq/) for more examples.
+See the [documentation](https://mikefarah.gitbook.io/yq/) for more.
 
 ## Install
 
@@ -110,32 +82,26 @@ 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 '.a.path'
+sudo cat /etc/myfile | yq e '.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 '.a.path = "value"' | sudo sponge /etc/myfile
+sudo cat /etc/myfile | yq e '.a.path = "value"' - | sudo sponge /etc/myfile
 ```
 or write to a temporary file:
 ```
-sudo cat /etc/myfile | yq '.a.path = "value"' | sudo tee /etc/myfile.tmp
+sudo cat /etc/myfile | yq e '.a.path = "value"' | sudo tee /etc/myfile.tmp
 sudo mv /etc/myfile.tmp /etc/myfile
 rm /etc/myfile.tmp
 ```
 
-### Run with Docker or Podman
+### Run with Docker
+
 #### Oneshot use:
 
 ```bash
-docker run --rm -v "${PWD}":/workdir mikefarah/yq [command] [flags] [expression ]FILE...
-```
-
-Note that you can run `yq` in docker without network access and other privileges if you desire,
-namely `--security-opt=no-new-privileges --cap-drop all --network none`.
-
-```bash
-podman run --rm -v "${PWD}":/workdir mikefarah/yq [command] [flags] [expression ]FILE...
+docker run --rm -v "${PWD}":/workdir mikefarah/yq <command> [flags] [expression ]FILE...
 ```
 
 #### Pipe in via STDIN:
@@ -143,11 +109,7 @@ podman run --rm -v "${PWD}":/workdir mikefarah/yq [command] [flags] [expression
 You'll need to pass the `-i\--interactive` flag to docker:
 
 ```bash
-docker run -i --rm mikefarah/yq '.this.thing' < myfile.yml
-```
-
-```bash
-podman run -i --rm mikefarah/yq '.this.thing' < myfile.yml
+cat myfile.yml | docker run -i --rm mikefarah/yq e . -
 ```
 
 #### Run commands interactively:
@@ -156,10 +118,6 @@ podman run -i --rm mikefarah/yq '.this.thing' < myfile.yml
 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:
 
 ```bash
@@ -168,42 +126,23 @@ yq() {
 }
 ```
 
-```bash
-yq() {
-  podman run --rm -i -v "${PWD}":/workdir mikefarah/yq "$@"
-}
-```
+
 #### 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:
+`yq`'s docker image no longer runs under root (https://github.com/mikefarah/yq/pull/860). If you'd like to install more things in the docker 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:
+Or, in your docker file:
 
 ```
 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
+RUN apk add bash
 USER yq
 ```
 
@@ -212,14 +151,14 @@ USER yq
   - name: Set foobar to cool
     uses: mikefarah/yq@master
     with:
-      cmd: yq -i '.foo.bar = "cool"' 'config.yml'
+      cmd: yq eval -i '.foo.bar = "cool"' 'config.yml'
 ```
 
 See https://mikefarah.gitbook.io/yq/usage/github-action for more.
 
-### Go Install:
+### Go Get:
 ```
-go install github.com/mikefarah/yq/v4@latest
+GO111MODULE=on go get github.com/mikefarah/yq/v4
 ```
 
 ## Community Supported Installation methods
@@ -234,12 +173,6 @@ 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:
 [![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)
@@ -277,23 +210,19 @@ 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, [JSON](https://mikefarah.gitbook.io/yq/usage/convert) and [XML](https://mikefarah.gitbook.io/yq/usage/xml) files
+- Uses similar syntax as `jq` but works with YAML and JSON 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
-- [Date/Time manipulation and formatting with TZ](https://mikefarah.gitbook.io/yq/operators/datetime)
-- [Deeply data structures](https://mikefarah.gitbook.io/yq/operators/traverse-read)
-- [Sort keys](https://mikefarah.gitbook.io/yq/operators/sort-keys)
+- [Deeply traverse yaml](https://mikefarah.gitbook.io/yq/operators/traverse-read)
+- [Sort yaml by 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 inplace](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate#flags)
+- [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/operators/select#select-and-update-matching-values-in-map)
 - Keeps yaml formatting and comments when updating (though there are issues with whitespace)
-- [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](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 properties](https://mikefarah.gitbook.io/yq/v/v4.x/usage/properties)
-- [Convert to csv/tsv](https://mikefarah.gitbook.io/yq/usage/csv-tsv)
+- [Convert to properties](https://mikefarah.gitbook.io/yq/v/v4.x/usage/properties)
+- [Pipe data in by using '-'](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate)
 - [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)
@@ -307,41 +236,28 @@ Usage:
   yq [flags]
   yq [command]
 
-Examples:
-
-# yq defaults to 'eval' command if no command is specified. See "yq eval --help" for more examples.
-yq '.stuff' < myfile.yml # outputs the data at the "stuff" node from "myfile.yml"
-
-yq -i '.stuff = "foo"' myfile.yml # update myfile.yml inplace
-
-
 Available Commands:
-  completion       Generate the autocompletion script for the specified shell
-  eval             (default) Apply the expression to each document in each yaml file in sequence
+  eval             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
   shell-completion Generate completion script
 
 Flags:
-  -C, --colors                        force print with colors
-  -e, --exit-status                   set exit status if there are no matches or null or false is returned
-  -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 inplace of first file given.
-  -p, --input-format string           [yaml|y|xml|x] parse format for input. Note that json is a subset of yaml. (default "yaml")
-  -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 docs from scratch.
-  -o, --output-format string          [yaml|y|json|j|props|p|xml|x] output format type. (default "yaml")
-  -P, --prettyPrint                   pretty print, shorthand for '... style = ""'
-  -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.
-      --unwrapScalar                  unwrap scalar, print the value with no quotes, colors or comments (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")
+  -C, --colors                force print with colors
+  -e, --exit-status           set exit status if there are no matches or null or false is returned
+  -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 seperators before processing expression. This is a workaround for go-yaml to persist header content (default true)
+  -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.
+  -o, --output-format string  [yaml|y|json|j|props|p] output format type. (default "yaml")
+  -P, --prettyPrint           pretty print, shorthand for '... style = ""'
+      --unwrapScalar          unwrap scalar, print the value with no quotes, colors or comments (default true)
+  -v, --verbose               verbose mode
+  -V, --version               Print version information and quit
 
 Use "yq [command] --help" for more information about a command.
 ```
@@ -349,4 +265,4 @@ Use "yq [command] --help" for more information about a command.
 - `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)
 
-See [tips and tricks](https://mikefarah.gitbook.io/yq/usage/tips-and-tricks) for more common problems and solutions.
+See [tips and tricks](https://mikefarah.gitbook.io/yq/usage/tips-and-tricks) for more common problems and solutions.

acceptance_tests/basic.sh

@@ -1,225 +1,12 @@
 #!/bin/bash
 
 setUp() {
-  rm test*.yml 2>/dev/null || true
-  rm .xyz 2>/dev/null || true
-  rm instructions.txt 2>/dev/null || true
+  rm test*.yml || 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"
-}
-
-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
-# dont 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=$(cat test.yml | ./yq ".a")
+  X=$(./yq e '.a' test.yml)
   assertEquals 123 "$X"
 }
 
@@ -232,15 +19,6 @@ EOL
   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
@@ -250,40 +28,6 @@ EOL
   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=$(./yq e '.z' test.yml)
@@ -296,12 +40,6 @@ testBasicExitStatus() {
   assertEquals 1 "$?"
 }
 
-testBasicExitStatusNoEval() {
-  echo "a: cat" > test.yml
-  X=$(./yq -e '.z' test.yml 2&>/dev/null)
-  assertEquals 1 "$?"
-}
-
 testBasicExtractFieldWithSeperator() {
     cat >test.yml <<EOL
 ---

acceptance_tests/completion.sh

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

acceptance_tests/inputs-format.sh

@@ -1,121 +0,0 @@
-#!/bin/bash
-
-setUp() {
-  rm test*.yml 2>/dev/null || true
-  rm test*.properties 2>/dev/null || true
-  rm test*.xml 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"
-}
-
-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.yml <<EOL
-<?xml version="1.0"?>
-<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">
-</map>
-EOL
-
-  read -r -d '' expected << EOM
-map:
-  +xmlns: some-namespace
-  +xmlns:xsi: some-instance
-  +xsi:schemaLocation: some-url
-EOM
-
-  X=$(./yq e -p=xml test.yml)
-  assertEquals "$expected" "$X"
-
-  X=$(./yq ea -p=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 2>&1)
-  assertEquals 1 $?
-  assertEquals "Error: bad file 'test.yml': XML syntax error on line 7: invalid character entity &writer;" "$X"
-
-  X=$(./yq ea -p=xml --xml-strict-mode test.yml 2>&1)
-  assertEquals "Error: bad file 'test.yml': XML syntax error on line 7: invalid character entity &writer;" "$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"
-}
-
-source ./scripts/shunit2

acceptance_tests/output-format.sh

@@ -102,65 +102,4 @@ EOM
   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"
-}
-
-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"
-}
-
 source ./scripts/shunit2

acceptance_tests/pipe.sh

@@ -1,70 +0,0 @@
-#!/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/split-printer.sh

@@ -25,31 +25,6 @@ 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

cmd/commands_test.go

@@ -0,0 +1,83 @@
+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/constant.go

@@ -6,13 +6,6 @@ var unwrapScalar = true
 var writeInplace = false
 var outputToJSON = false
 var outputFormat = "yaml"
-var inputFormat = "yaml"
-
-var xmlAttributePrefix = "+"
-var xmlContentName = "+content"
-var xmlStrictMode = false
-var xmlKeepNamespace = true
-var xmlUseRawToken = true
 
 var exitStatus = false
 var forceColor = false
@@ -29,10 +22,5 @@ var prettyPrint = false
 var frontMatter = ""
 
 var splitFileExp = ""
-var splitFileExpFile = ""
 
 var completedSuccessfully = false
-
-var forceExpression = ""
-
-var expressionFile = ""

cmd/evaluate_all_command.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"errors"
+	"os"
 
 	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
@@ -38,7 +39,7 @@ Note that it consumes more memory than eval.
 	}
 	return cmdEvalAll
 }
-func evaluateAll(cmd *cobra.Command, args []string) (cmdError error) {
+func evaluateAll(cmd *cobra.Command, args []string) error {
 	// 0 args, read std in
 	// 1 arg, null input, process expression
 	// 1 arg, read file in sequence
@@ -46,28 +47,27 @@ func evaluateAll(cmd *cobra.Command, args []string) (cmdError error) {
 
 	var err error
 
-	expression, args, err := initCommand(cmd, args)
+	firstFileIndex, err := initCommand(cmd, args)
 	if err != nil {
 		return err
 	}
 
+	stat, _ := os.Stdin.Stat()
+	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
+
 	out := cmd.OutOrStdout()
 
 	if writeInplace {
 		// only use colors if its forced
 		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[0])
+		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[firstFileIndex])
 		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)
-			}
-		}()
+		defer func() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
 	}
 
 	format, err := yqlib.OutputFormatFromString(outputFormat)
@@ -75,26 +75,17 @@ func evaluateAll(cmd *cobra.Command, args []string) (cmdError error) {
 		return err
 	}
 
-	decoder, err := configureDecoder()
-	if err != nil {
-		return err
-	}
+	printerWriter := configurePrinterWriter(format, out)
 
-	printerWriter, err := configurePrinterWriter(format, out)
-	if err != nil {
-		return err
-	}
-	encoder := configureEncoder(format)
-
-	printer := yqlib.NewPrinter(encoder, printerWriter)
+	printer := yqlib.NewPrinter(printerWriter, format, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
 
 	if frontMatter != "" {
-		frontMatterHandler := yqlib.NewFrontMatterHandler(args[0])
+		frontMatterHandler := yqlib.NewFrontMatterHandler(args[firstFileIndex])
 		err = frontMatterHandler.Split()
 		if err != nil {
 			return err
 		}
-		args[0] = frontMatterHandler.GetYamlFrontMatterFilename()
+		args[firstFileIndex] = frontMatterHandler.GetYamlFrontMatterFilename()
 
 		if frontMatter == "process" {
 			reader := frontMatterHandler.GetContentReader()
@@ -105,17 +96,22 @@ func evaluateAll(cmd *cobra.Command, args []string) (cmdError error) {
 	}
 
 	allAtOnceEvaluator := yqlib.NewAllAtOnceEvaluator()
-
 	switch len(args) {
 	case 0:
-		if nullInput {
-			err = yqlib.NewStreamEvaluator().EvaluateNew(processExpression(expression), printer, "")
+		if pipingStdIn {
+			err = allAtOnceEvaluator.EvaluateFiles(processExpression(""), []string{"-"}, printer, leadingContentPreProcessing)
 		} else {
 			cmd.Println(cmd.UsageString())
 			return nil
 		}
+	case 1:
+		if nullInput {
+			err = yqlib.NewStreamEvaluator().EvaluateNew(processExpression(args[0]), printer, "")
+		} else {
+			err = allAtOnceEvaluator.EvaluateFiles(processExpression(""), []string{args[0]}, printer, leadingContentPreProcessing)
+		}
 	default:
-		err = allAtOnceEvaluator.EvaluateFiles(processExpression(expression), args, printer, leadingContentPreProcessing, decoder)
+		err = allAtOnceEvaluator.EvaluateFiles(processExpression(args[0]), args[1:], printer, leadingContentPreProcessing)
 	}
 
 	completedSuccessfully = err == nil

cmd/evalute_sequence_command.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"errors"
 	"fmt"
+	"os"
 
 	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
@@ -12,7 +13,7 @@ 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",
+		Short:   "Apply the expression to each document in each yaml file in sequence",
 		Example: `
 # Reads field under the given path for each file
 yq e '.a.b' f1.yml f2.yml 
@@ -43,45 +44,43 @@ expression and prints the result in sequence.`,
 }
 
 func processExpression(expression string) string {
-
+	var prettyPrintExp = `(... | (select(tag != "!!str"), select(tag == "!!str") | select(test("(?i)^(y|yes|n|no|on|off)$") | not))  ) style=""`
 	if prettyPrint && expression == "" {
-		return yqlib.PrettyPrintExp
+		return prettyPrintExp
 	} else if prettyPrint {
-		return fmt.Sprintf("%v | %v", expression, yqlib.PrettyPrintExp)
+		return fmt.Sprintf("%v | %v", expression, prettyPrintExp)
 	}
 	return expression
 }
 
-func evaluateSequence(cmd *cobra.Command, args []string) (cmdError error) {
+func evaluateSequence(cmd *cobra.Command, args []string) 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)
+	firstFileIndex, err := initCommand(cmd, args)
 	if err != nil {
 		return err
 	}
 
+	stat, _ := os.Stdin.Stat()
+	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
+
+	out := cmd.OutOrStdout()
+
 	if writeInplace {
 		// only use colors if its forced
 		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[0])
+		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[firstFileIndex])
 		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)
-			}
-		}()
+		defer func() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
 	}
 
 	format, err := yqlib.OutputFormatFromString(outputFormat)
@@ -89,28 +88,19 @@ func evaluateSequence(cmd *cobra.Command, args []string) (cmdError error) {
 		return err
 	}
 
-	printerWriter, err := configurePrinterWriter(format, out)
-	if err != nil {
-		return err
-	}
-	encoder := configureEncoder(format)
+	printerWriter := configurePrinterWriter(format, out)
 
-	printer := yqlib.NewPrinter(encoder, printerWriter)
+	printer := yqlib.NewPrinter(printerWriter, format, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
 
-	decoder, err := configureDecoder()
-	if err != nil {
-		return err
-	}
 	streamEvaluator := yqlib.NewStreamEvaluator()
 
 	if frontMatter != "" {
-		yqlib.GetLogger().Debug("using front matter handler")
-		frontMatterHandler := yqlib.NewFrontMatterHandler(args[0])
+		frontMatterHandler := yqlib.NewFrontMatterHandler(args[firstFileIndex])
 		err = frontMatterHandler.Split()
 		if err != nil {
 			return err
 		}
-		args[0] = frontMatterHandler.GetYamlFrontMatterFilename()
+		args[firstFileIndex] = frontMatterHandler.GetYamlFrontMatterFilename()
 
 		if frontMatter == "process" {
 			reader := frontMatterHandler.GetContentReader()
@@ -122,14 +112,20 @@ func evaluateSequence(cmd *cobra.Command, args []string) (cmdError error) {
 
 	switch len(args) {
 	case 0:
-		if nullInput {
-			err = streamEvaluator.EvaluateNew(processExpression(expression), printer, "")
+		if pipingStdIn {
+			err = streamEvaluator.EvaluateFiles(processExpression(""), []string{"-"}, printer, leadingContentPreProcessing)
 		} else {
 			cmd.Println(cmd.UsageString())
 			return nil
 		}
+	case 1:
+		if nullInput {
+			err = streamEvaluator.EvaluateNew(processExpression(args[0]), printer, "")
+		} else {
+			err = streamEvaluator.EvaluateFiles(processExpression(""), []string{args[0]}, printer, leadingContentPreProcessing)
+		}
 	default:
-		err = streamEvaluator.EvaluateFiles(processExpression(expression), args, printer, leadingContentPreProcessing, decoder)
+		err = streamEvaluator.EvaluateFiles(processExpression(args[0]), args[1:], printer, leadingContentPreProcessing)
 	}
 	completedSuccessfully = err == nil
 

cmd/root.go

@@ -3,7 +3,6 @@ package cmd
 import (
 	"os"
 
-	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
 	logging "gopkg.in/op/go-logging.v1"
 )
@@ -14,30 +13,17 @@ func New() *cobra.Command {
 		Short: "yq is a lightweight and portable command-line YAML processor.",
 		Long: `yq is a portable command-line YAML processor (https://github.com/mikefarah/yq/) 
 See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.`,
-		Example: `
-# yq defaults to 'eval' command if no command is specified. See "yq eval --help" for more examples.
-
-# 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 sample.json
-`,
-
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if version {
 				cmd.Print(GetVersionDisplay())
 				return nil
 			}
-			return evaluateSequence(cmd, args)
+			cmd.Println(cmd.UsageString())
+			return nil
 
 		},
 		PersistentPreRun: func(cmd *cobra.Command, args []string) {
 			cmd.SetOut(cmd.OutOrStdout())
-
 			var format = logging.MustStringFormatter(
 				`%{color}%{time:15:04:05} %{shortfunc} [%{level:.4s}]%{color:reset} %{message}`,
 			)
@@ -51,10 +37,6 @@ yq -P sample.json
 			}
 
 			logging.SetBackend(backend)
-			yqlib.InitExpressionParser()
-			yqlib.XMLPreferences.AttributePrefix = xmlAttributePrefix
-			yqlib.XMLPreferences.ContentName = xmlContentName
-			yqlib.XMLPreferences.StrictMode = xmlStrictMode
 		},
 	}
 
@@ -66,21 +48,13 @@ yq -P sample.json
 		panic(err)
 	}
 
-	rootCmd.PersistentFlags().StringVarP(&outputFormat, "output-format", "o", "yaml", "[yaml|y|json|j|props|p|xml|x] output format type.")
-	rootCmd.PersistentFlags().StringVarP(&inputFormat, "input-format", "p", "yaml", "[yaml|y|props|p|xml|x] parse format for input. Note that json is a subset of yaml.")
-
-	rootCmd.PersistentFlags().StringVar(&xmlAttributePrefix, "xml-attribute-prefix", "+", "prefix for xml attributes")
-	rootCmd.PersistentFlags().StringVar(&xmlContentName, "xml-content-name", "+content", "name for xml content (if no attribute name is present).")
-	rootCmd.PersistentFlags().BoolVar(&xmlStrictMode, "xml-strict-mode", false, "enables strict parsing of XML. See https://pkg.go.dev/encoding/xml for more details.")
-	rootCmd.PersistentFlags().BoolVar(&xmlKeepNamespace, "xml-keep-namespace", true, "enables keeping namespace after parsing attributes")
-	rootCmd.PersistentFlags().BoolVar(&xmlUseRawToken, "xml-raw-token", true, "enables using RawToken method instead Token. Commonly disables namespace translations. See https://pkg.go.dev/encoding/xml#Decoder.RawToken for details.")
-
-	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().StringVarP(&outputFormat, "output-format", "o", "yaml", "[yaml|y|json|j|props|p] output format type.")
+	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(&noDocSeparators, "no-doc", "N", false, "Don't print document separators (---)")
 
 	rootCmd.PersistentFlags().IntVarP(&indent, "indent", "I", 2, "sets indent level for output")
 	rootCmd.Flags().BoolVarP(&version, "version", "V", false, "Print version information and quit")
-	rootCmd.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the file inplace of first file given.")
+	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(&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")
@@ -88,13 +62,9 @@ yq -P sample.json
 	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().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")
-	rootCmd.PersistentFlags().StringVarP(&forceExpression, "expression", "", "", "forcibly set the expression argument. Useful when yq argument detection thinks your expression is a file.")
-	rootCmd.PersistentFlags().BoolVarP(&leadingContentPreProcessing, "header-preprocess", "", true, "Slurp any header comments and separators before processing expression.")
+	rootCmd.PersistentFlags().BoolVarP(&leadingContentPreProcessing, "header-preprocess", "", true, "Slurp any header comments and separators before processing expression. This is a workaround for go-yaml to persist header content properly.")
 
 	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.")
-	rootCmd.PersistentFlags().StringVarP(&splitFileExpFile, "split-exp-file", "", "", "Use a file to specify the split-exp expression.")
-
-	rootCmd.PersistentFlags().StringVarP(&expressionFile, "from-file", "", "", "Load expression from specified file.")
 
 	rootCmd.AddCommand(
 		createEvaluateSequenceCommand(),

cmd/utils.go

@@ -7,10 +7,9 @@ import (
 
 	"github.com/mikefarah/yq/v4/pkg/yqlib"
 	"github.com/spf13/cobra"
-	"gopkg.in/op/go-logging.v1"
 )
 
-func initCommand(cmd *cobra.Command, args []string) (string, []string, error) {
+func initCommand(cmd *cobra.Command, args []string) (firstFileIndex int, err error) {
 	cmd.SilenceUsage = true
 
 	fileInfo, _ := os.Stdout.Stat()
@@ -19,153 +18,46 @@ func initCommand(cmd *cobra.Command, args []string) (string, []string, error) {
 		colorsEnabled = true
 	}
 
-	expression, args, err := processArgs(args)
-	if err != nil {
-		return "", nil, err
+	firstFileIndex = -1
+	if !nullInput && len(args) == 1 {
+		firstFileIndex = 0
+	} else if len(args) > 1 {
+		firstFileIndex = 1
 	}
 
-	if splitFileExpFile != "" {
-		splitExpressionBytes, err := os.ReadFile(splitFileExpFile)
-		if err != nil {
-			return "", nil, err
-		}
-		splitFileExp = string(splitExpressionBytes)
-	}
-
-	// backwards compatibility
+	// backwards compatibilty
 	if outputToJSON {
 		outputFormat = "json"
 	}
 
-	if writeInplace && (len(args) == 0 || args[0] == "-") {
-		return "", nil, fmt.Errorf("write inplace flag only applicable when giving an expression and at least one file")
-	}
-
-	if frontMatter != "" && len(args) == 0 {
-		return "", nil, fmt.Errorf("front matter flag only applicable when giving an expression and at least one file")
+	if writeInplace && (firstFileIndex == -1) {
+		return 0, fmt.Errorf("write inplace flag only applicable when giving an expression and at least one file")
 	}
 
 	if writeInplace && splitFileExp != "" {
-		return "", nil, fmt.Errorf("write inplace cannot be used with split file")
+		return 0, fmt.Errorf("write inplace cannot be used with split file")
 	}
 
-	if nullInput && len(args) > 0 {
-		return "", nil, fmt.Errorf("cannot pass files in when using null-input flag")
+	if nullInput && len(args) > 1 {
+		return 0, fmt.Errorf("cannot pass files in when using null-input flag")
 	}
 
-	return expression, args, nil
+	return firstFileIndex, nil
 }
 
-func configureDecoder() (yqlib.Decoder, error) {
-	yqlibInputFormat, err := yqlib.InputFormatFromString(inputFormat)
-	if err != nil {
-		return nil, err
-	}
-	switch yqlibInputFormat {
-	case yqlib.XMLInputFormat:
-		return yqlib.NewXMLDecoder(xmlAttributePrefix, xmlContentName, xmlStrictMode, xmlKeepNamespace, xmlUseRawToken), nil
-	case yqlib.PropertiesInputFormat:
-		return yqlib.NewPropertiesDecoder(), nil
-	}
-
-	return yqlib.NewYamlDecoder(), nil
-}
-
-func configurePrinterWriter(format yqlib.PrinterOutputFormat, out io.Writer) (yqlib.PrinterWriter, error) {
+func configurePrinterWriter(format yqlib.PrinterOutputFormat, out io.Writer) yqlib.PrinterWriter {
 
 	var printerWriter yqlib.PrinterWriter
 
 	if splitFileExp != "" {
 		colorsEnabled = forceColor
-		splitExp, err := yqlib.ExpressionParser.ParseExpression(splitFileExp)
+		splitExp, err := yqlib.NewExpressionParser().ParseExpression(splitFileExp)
 		if err != nil {
-			return nil, fmt.Errorf("bad split document expression: %w", err)
+			return nil
 		}
 		printerWriter = yqlib.NewMultiPrinterWriter(splitExp, format)
 	} else {
 		printerWriter = yqlib.NewSinglePrinterWriter(out)
 	}
-	return printerWriter, nil
-}
-
-func configureEncoder(format yqlib.PrinterOutputFormat) yqlib.Encoder {
-	switch format {
-	case yqlib.JSONOutputFormat:
-		return yqlib.NewJONEncoder(indent, colorsEnabled)
-	case yqlib.PropsOutputFormat:
-		return yqlib.NewPropertiesEncoder()
-	case yqlib.CSVOutputFormat:
-		return yqlib.NewCsvEncoder(',')
-	case yqlib.TSVOutputFormat:
-		return yqlib.NewCsvEncoder('\t')
-	case yqlib.YamlOutputFormat:
-		return yqlib.NewYamlEncoder(indent, colorsEnabled, !noDocSeparators, unwrapScalar)
-	case yqlib.XMLOutputFormat:
-		return yqlib.NewXMLEncoder(indent, xmlAttributePrefix, xmlContentName)
-	}
-	panic("invalid encoder")
-}
-
-// 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(logging.DEBUG) {
-		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, _ := os.Stdin.Stat()
-	pipingStdin := (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
-	if expressionFile != "" {
-		expressionBytes, err := os.ReadFile(expressionFile)
-		if err != nil {
-			return "", nil, err
-		}
-		expression = string(expressionBytes)
-	}
-
-	args := processStdInArgs(originalArgs)
-	yqlib.GetLogger().Debugf("processed args: %v", args)
-	if expression == "" && len(args) > 0 && args[0] != "-" && !maybeFile(args[0]) {
-		yqlib.GetLogger().Debug("assuming expression is '%v'", args[0])
-		expression = args[0]
-		args = args[1:]
-	}
-	return expression, args, nil
+	return printerWriter
 }

cmd/version.go

@@ -11,7 +11,7 @@ var (
 	GitDescribe string
 
 	// Version is main version number that is being run at the moment.
-	Version = "4.25.2"
+	Version = "4.14.2"
 
 	// 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

debian/changelog

@@ -1,112 +1,3 @@
-yq (4.16.2) focal; urgency=medium
-
-  * Fixed with semicolon space issue
-  * Updating with documentation
-  * Added STDIN example to the top
-  * minor readme cleanup
-  * Help text tweak
-  * Fixed docker timeout - simplify docker builds
-  * New release with docker build fixes
-  * Updating to go 1.17 to fix CVE #944
-  * Fix a typo in root.go
-  * Skip the tests if the nocheck Debian build option is specified
-  * Fixed select bug (#958)
-  * Sped up explode operator
-  * Slight performance improvement to context.ChildContext
-  * Speed up multiply
-  * Update README with recently added / changed options
-  * Make deepMatch report in linear time
-  * Removed leadingContentPreProcessing flag - header preprocessing is stable
-  * Revert "Removed leadingContentPreProcessing flag - header preprocessing is stable"
-  * Keep flag, it is needed in corner cases
-  * Updated Readme
-  * Man page
-  * Fixed expression parsing bug #970
-  * Bumping go-lang, docker versions
-  * Added test release flow
-  * Updated github action release to generate man page
-  * Bumping version
-  * Removing no longer needed github action
-  * Added decoder op
-  * Fixed newline handling when decoding/encoding
-  * Fixed newline handling in encoder/decoder
-  * Can specify indent in encode ops
-  * Added group_by operator
-  * Added flatten operator
-  * Fixed flatten error message
-  * Improving docs
-  * Split printer
-  * Refactored command logic
-  * Fix JSON encoding removing null #985
-  * Fixed acceptance tests
-  * gitbook
-  * Update document generation script
-  * Updating README
-  * Updating release instructions
-  * github action no longer uses data1.yml
-  * Create dependabot.yml
-  * Bump actions/create-release from 1.0.0 to 1.1.4
-  * Bump actions/setup-go from 1 to 2.1.4
-  * Bump github.com/goccy/go-yaml from 1.8.9 to 1.9.4
-  * Bump github.com/jinzhu/copier from 0.2.8 to 0.3.2
-  * Bump github.com/fatih/color from 1.10.0 to 1.13.0
-  * Bump github.com/spf13/cobra from 1.1.3 to 1.2.1
-  * Update dependabot.yml
-  * Update go.yml
-  * add build check to PRs
-  * Include secure as part of build process
-  * Fixing bad label in github action
-  * fixed printer test
-  * remove leading content indicator
-  * Fixed header preprocessing!
-  * lint : define golangci configuration file
-  * Update check.sh
-  * Load file acceptance test
-  * Minor improvement on handling front matter
-  * Improved load doc
-  * feature: detect MANPATh and install there
-  * Update install-man-page.sh
-  * simplify prod stage, move version label to action
-  * add labels, quote some values
-  * enable errorlint linter
-  * Added errorlint to devtools
-  * Added key operator
-  * Added more tests
-  * Fixing comments
-  * Attempt to fix golint problem
-  * Include version query for tools
-  * Clean up errored file?
-  * enable misspell linter
-  * updated readme
-  * update Golangci version to v1.43.0
-  * gci linter
-  * Better merge array by key example
-  * Added credit for merge by array example
-  * Better formatting of merge arrays example
-  * Better merge example
-  * Add accessor for the yq logger instance (#1013)
-  * Fixed collect op when working with multiple nodes
-  * Added map, map_values
-  * Add support for Podman as well as Docker (#1026)
-  * Bump github.com/jinzhu/copier from 0.3.2 to 0.3.4 (#1027)
-  * Added csv, tsv output formats
-  * Added encoder tests
-  * Cleanup test
-  * Fixed docker permission issue #1014
-  * Recording release notes for next release
-  * Assignment op no longer clobbers anchor (#1029)
-  * Added sort_by operator
-  * Improved error message
-  * Improved tips and tricks
-  * Report while filename failed to parse #1030
-  * Added script for extracting checksums
-  * Improved extract-checksum.sh
-  * Bump github.com/spf13/cobra from 1.2.1 to 1.3.0 (#1039)
-  * enable more linters (#1043)
-  * Bump golang compiler #1037
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Tue, 21 Dec 2021 09:41:44 +0000
-
 yq (4.13.0) focal; urgency=medium
 
   * New `with` operator for making multiple changes to a given path

debian/control

@@ -3,8 +3,7 @@ Section: devel
 Priority: optional
 Maintainer: Roberto Mier Escandón <rmescandon@gmail.com>
 Build-Depends: debhelper (>=10),
-               golang-1.17-go,
-               pandoc,
+               golang-1.15,
                rsync
 Standards-Version: 4.1.4
 Homepage: https://github.com/mikefarah/yq.git

debian/rules

@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 #
-# Copyright (C) 2018-2021 Roberto Mier Escandón <rmescandon@gmail.com>
+# 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
@@ -17,21 +17,20 @@
 PROJECT := yq
 OWNER := mikefarah
 REPO := github.com
+GOVERSION := 1.15
 
 export DH_OPTIONS
 export DH_GOPKG := ${REPO}/${OWNER}/${PROJECT}
-export GOROOT := /usr/local/go
+export GOROOT := /usr/lib/go-${GOVERSION}
 export GOPATH := ${CURDIR}/_build
 export GOBIN := ${GOPATH}/bin
 export PATH := ${GOROOT}/bin:${GOBIN}:${PATH}
 export GOCACHE := /tmp/gocache
 export GOFLAGS := -mod=vendor
-export GO111MODULE := on
 
 SRCDIR := ${GOPATH}/src/${DH_GOPKG}
 DESTDIR := ${CURDIR}/debian/${PROJECT}
 BINDIR := /usr/bin
-MANDIR := /usr/share/man/man1/
 ASSETSDIR := /usr/share/${PROJECT}
 
 %:
@@ -43,17 +42,7 @@ override_dh_auto_build:
 	# 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 ./... \
-	)
-
-	# build man page
-	( \
-		cd ${SRCDIR} && \
-		./scripts/generate-man-page-md.sh && \
-		./scripts/generate-man-page.sh \
-	)
+	(cd ${SRCDIR} && go install -buildmode=pie ./...)
 	
 override_dh_auto_test:
 ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
@@ -65,10 +54,6 @@ override_dh_auto_install:
 	cp -f ${SRCDIR}/LICENSE ${DESTDIR}/${ASSETSDIR}
 	chmod a+x ${DESTDIR}/${BINDIR}/yq
 
-	# man
-	mkdir -p "${DESTDIR}"/"${MANDIR}"
-	cp "${SRCDIR}"/yq.1 "${DESTDIR}"/"${MANDIR}" \
-
 override_dh_auto_clean:
 	dh_clean
 	rm -rf ${CURDIR}/_build

examples/base64.txt

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

examples/data1.yaml

@@ -1,12 +1,2 @@
-# --------------------------------------------------
-# It's a test with comment
-# --------------------------------------------------
-test:
-  - name: a
-  - name: b
-  - name: c
-groups:
-  - name: a
-  - name: b
-  - name: c
-  - name: c
+a:
+  include: 'data2.yaml'

examples/data2.yaml

@@ -1,5 +1,2 @@
-# --------------------------------------------------
-# It's a test with comment
-# --------------------------------------------------
-groups:
-  - name: d
+c:
+  d: hamster

examples/example.properties

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

examples/mike.xml

@@ -1,14 +0,0 @@
-<!-- before cat -->
-<cat>
-	<!-- in cat before -->
-	<x>3<!-- multi
-line comment
-for x --></x>
-	<y>
-		<!-- in y before -->
-		<d><!-- in d before -->4<!-- in d after --></d>
-		<!-- in y after -->
-	</y>
-	<!-- in_cat_after -->
-</cat>
-<!-- after cat -->

examples/mike2.xml

@@ -1,11 +0,0 @@
-  <?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/small.properties

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

examples/small.xml

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

github-action/Dockerfile

@@ -1,4 +1,4 @@
-FROM mikefarah/yq:4
+FROM mikefarah/yq:4.14.2
 
 COPY entrypoint.sh /entrypoint.sh
 

go.mod

@@ -1,29 +1,25 @@
 module github.com/mikefarah/yq/v4
 
 require (
-	github.com/a8m/envsubst v1.3.0
 	github.com/elliotchance/orderedmap v1.4.0
 	github.com/fatih/color v1.13.0
-	github.com/goccy/go-yaml v1.9.5
-	github.com/jinzhu/copier v0.3.5
-	github.com/magiconair/properties v1.8.6
-	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e
-	github.com/spf13/cobra v1.4.0
+	github.com/goccy/go-yaml v1.9.4
+	github.com/jinzhu/copier v0.3.2
+	github.com/magiconair/properties v1.8.5
+	github.com/spf13/cobra v1.2.1
 	github.com/timtadh/lexmachine v0.2.2
-	golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d
 	gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473
-	gopkg.in/yaml.v3 v3.0.1
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 )
 
 require (
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-colorable v0.1.9 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/timtadh/data-structures v0.5.3 // indirect
-	golang.org/x/sys v0.0.0-20211205182925-97ca703d548d // indirect
-	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )
 
-go 1.18
+go 1.17

go.sum

@@ -1,76 +1,605 @@
-github.com/a8m/envsubst v1.3.0 h1:GmXKmVssap0YtlU3E230W98RWtWCyIZzjtf1apWWyAg=
-github.com/a8m/envsubst v1.3.0/go.mod h1:MVUTQNGQ3tsjOOtKCNd+fl8RzhsXcDvvAEzkhGtlsbY=
-github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
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how-it-works.md

@@ -19,7 +19,7 @@ with an expression:
 .a = .b
 ```
 
-Like math expressions - operator precedence is important. 
+Like math expression - operator precedence is important. 
 
 The `=` operator takes two arguments, a `lhs` expression, which in this case is `.a` and `rhs` expression which is `.b`. 
 
@@ -47,7 +47,7 @@ b: dog
 
 ## Complex assignment, operator precedence rules
 
-Just like math expressions - `yq` expressions have an order of precedence. The pipe `|` operator has a low order of precedence, so operators with higher precedence will get evaluated first. 
+Just like math expression - `yq` expression have an order of precedence. The pipe `|` operator has a low order of precedence, so operators with higher precedence will get evalated first. 
 
 Most of the time, this is intuitively what you'd want, for instance `.a = "cat" | .b = "dog"` is effectively: `(.a = "cat") | (.b = "dog")`.
 
@@ -66,7 +66,7 @@ Lets say you had:
 Lets say you wanted to update the `sally` entry to have fruit: 'mango'. The _incorrect_ way to do that is:
 `.[] | select(.name == "sally") | .fruit = "mango"`.
 
-Because `|` has a low operator precedence, this will be evaluated (_incorrectly_) as : `(.[]) | (select(.name == "sally")) | (.fruit = "mango")`. What you'll see is only the updated segment returned:
+Becasue `|` has a low operator precedence, this will be evaluated (_incorrectly_) as : `(.[]) | (select(.name == "sally")) | (.fruit = "mango")`. What you'll see is only the updated segment returned:
 
 ```yaml
 name: sally

pkg/yqlib/all_at_once_evaluator.go

@@ -8,7 +8,7 @@ import (
 
 // A yaml expression evaluator that runs the expression once against all files/nodes in memory.
 type Evaluator interface {
-	EvaluateFiles(expression string, filenames []string, printer Printer, leadingContentPreProcessing bool, decoder Decoder) error
+	EvaluateFiles(expression string, filenames []string, printer Printer, leadingContentPreProcessing bool) error
 
 	// EvaluateNodes takes an expression and one or more yaml nodes, returning a list of matching candidate nodes
 	EvaluateNodes(expression string, nodes ...*yaml.Node) (*list.List, error)
@@ -19,11 +19,11 @@ type Evaluator interface {
 
 type allAtOnceEvaluator struct {
 	treeNavigator DataTreeNavigator
+	treeCreator   ExpressionParser
 }
 
 func NewAllAtOnceEvaluator() Evaluator {
-	InitExpressionParser()
-	return &allAtOnceEvaluator{treeNavigator: NewDataTreeNavigator()}
+	return &allAtOnceEvaluator{treeNavigator: NewDataTreeNavigator(), treeCreator: NewExpressionParser()}
 }
 
 func (e *allAtOnceEvaluator) EvaluateNodes(expression string, nodes ...*yaml.Node) (*list.List, error) {
@@ -35,7 +35,7 @@ func (e *allAtOnceEvaluator) EvaluateNodes(expression string, nodes ...*yaml.Nod
 }
 
 func (e *allAtOnceEvaluator) EvaluateCandidateNodes(expression string, inputCandidates *list.List) (*list.List, error) {
-	node, err := ExpressionParser.ParseExpression(expression)
+	node, err := e.treeCreator.ParseExpression(expression)
 	if err != nil {
 		return nil, err
 	}
@@ -46,11 +46,11 @@ func (e *allAtOnceEvaluator) EvaluateCandidateNodes(expression string, inputCand
 	return context.MatchingNodes, nil
 }
 
-func (e *allAtOnceEvaluator) EvaluateFiles(expression string, filenames []string, printer Printer, leadingContentPreProcessing bool, decoder Decoder) error {
+func (e *allAtOnceEvaluator) EvaluateFiles(expression string, filenames []string, printer Printer, leadingContentPreProcessing bool) error {
 	fileIndex := 0
 	firstFileLeadingContent := ""
 
-	var allDocuments = list.New()
+	var allDocuments *list.List = list.New()
 	for _, filename := range filenames {
 		reader, leadingContent, err := readStream(filename, fileIndex == 0 && leadingContentPreProcessing)
 		if err != nil {
@@ -61,7 +61,7 @@ func (e *allAtOnceEvaluator) EvaluateFiles(expression string, filenames []string
 			firstFileLeadingContent = leadingContent
 		}
 
-		fileDocuments, err := readDocuments(reader, filename, fileIndex, decoder)
+		fileDocuments, err := readDocuments(reader, filename, fileIndex)
 		if err != nil {
 			return err
 		}

pkg/yqlib/candidate_node.go

@@ -3,7 +3,6 @@ package yqlib
 import (
 	"container/list"
 	"fmt"
-	"strings"
 
 	"github.com/jinzhu/copier"
 	yaml "gopkg.in/yaml.v3"
@@ -12,17 +11,15 @@ import (
 type CandidateNode struct {
 	Node   *yaml.Node     // the actual node
 	Parent *CandidateNode // parent node
-	Key    *yaml.Node     // node key, if this is a value from a map (or index in an array)
 
-	LeadingContent  string
-	TrailingContent string
+	LeadingContent string
 
 	Path      []interface{} /// the path we took to get to this node
 	Document  uint          // the document index of this node
 	Filename  string
 	FileIndex int
 	// when performing op against all nodes given, this will treat all the nodes as one
-	// (e.g. top level cross document merge). This property does not propagate to child nodes.
+	// (e.g. top level cross document merge). This property does not propegate to child nodes.
 	EvaluateTogether bool
 	IsMapKey         bool
 }
@@ -35,75 +32,23 @@ func (n *CandidateNode) GetKey() string {
 	return fmt.Sprintf("%v%v - %v", keyPrefix, n.Document, n.Path)
 }
 
-func (n *CandidateNode) GetNiceTag() string {
-	return unwrapDoc(n.Node).Tag
-}
-
-func (n *CandidateNode) GetNicePath() string {
-	if n.Path != nil && len(n.Path) >= 0 {
-		pathStr := make([]string, len(n.Path))
-		for i, v := range n.Path {
-			pathStr[i] = fmt.Sprintf("%v", v)
-		}
-		return strings.Join(pathStr, ".")
-	}
-	return ""
-}
-
 func (n *CandidateNode) AsList() *list.List {
 	elMap := list.New()
 	elMap.PushBack(n)
 	return elMap
 }
 
-func (n *CandidateNode) CreateChildInMap(key *yaml.Node, node *yaml.Node) *CandidateNode {
-	var value interface{}
-	if key != nil {
-		value = key.Value
-	}
+func (n *CandidateNode) CreateChild(path interface{}, node *yaml.Node) *CandidateNode {
 	return &CandidateNode{
 		Node:      node,
-		Path:      n.createChildPath(value),
+		Path:      n.createChildPath(path),
 		Parent:    n,
-		Key:       key,
 		Document:  n.Document,
 		Filename:  n.Filename,
 		FileIndex: n.FileIndex,
 	}
 }
 
-func (n *CandidateNode) CreateChildInArray(index int, node *yaml.Node) *CandidateNode {
-	return &CandidateNode{
-		Node:      node,
-		Path:      n.createChildPath(index),
-		Parent:    n,
-		Key:       &yaml.Node{Kind: yaml.ScalarNode, Value: fmt.Sprintf("%v", index), Tag: "!!int"},
-		Document:  n.Document,
-		Filename:  n.Filename,
-		FileIndex: n.FileIndex,
-	}
-}
-
-func (n *CandidateNode) CreateReplacement(node *yaml.Node) *CandidateNode {
-	return &CandidateNode{
-		Node:      node,
-		Path:      n.createChildPath(nil),
-		Parent:    n.Parent,
-		Key:       n.Key,
-		IsMapKey:  n.IsMapKey,
-		Document:  n.Document,
-		Filename:  n.Filename,
-		FileIndex: n.FileIndex,
-	}
-}
-
-func (n *CandidateNode) CreateReplacementWithDocWrappers(node *yaml.Node) *CandidateNode {
-	replacement := n.CreateReplacement(node)
-	replacement.LeadingContent = n.LeadingContent
-	replacement.TrailingContent = n.TrailingContent
-	return replacement
-}
-
 func (n *CandidateNode) createChildPath(path interface{}) []interface{} {
 	if path == nil {
 		newPath := make([]interface{}, len(n.Path))
@@ -124,29 +69,18 @@ func (n *CandidateNode) Copy() (*CandidateNode, error) {
 	if err != nil {
 		return nil, err
 	}
-	clone.Node = deepClone(n.Node)
 	return clone, nil
 }
 
 // updates this candidate from the given candidate node
-func (n *CandidateNode) UpdateFrom(other *CandidateNode, prefs assignPreferences) {
+func (n *CandidateNode) UpdateFrom(other *CandidateNode) {
 
-	// if this is an empty map or empty array, use the style of other node.
-	if (n.Node.Kind != yaml.ScalarNode && len(n.Node.Content) == 0) ||
-		// if the tag has changed (e.g. from str to bool)
-		(guessTagFromCustomType(n.Node) != guessTagFromCustomType(other.Node)) {
-		n.Node.Style = other.Node.Style
-	}
-
-	n.Node.Content = deepCloneContent(other.Node.Content)
-	n.Node.Kind = other.Node.Kind
+	n.UpdateAttributesFrom(other)
+	n.Node.Content = other.Node.Content
 	n.Node.Value = other.Node.Value
-
-	n.UpdateAttributesFrom(other, prefs)
-
 }
 
-func (n *CandidateNode) UpdateAttributesFrom(other *CandidateNode, prefs assignPreferences) {
+func (n *CandidateNode) UpdateAttributesFrom(other *CandidateNode) {
 	log.Debug("UpdateAttributesFrom: n: %v other: %v", n.GetKey(), other.GetKey())
 	if n.Node.Kind != other.Node.Kind {
 		// clear out the contents when switching to a different type
@@ -155,21 +89,12 @@ func (n *CandidateNode) UpdateAttributesFrom(other *CandidateNode, prefs assignP
 		n.Node.Value = ""
 	}
 	n.Node.Kind = other.Node.Kind
-
-	// don't clobber custom tags...
-	if strings.HasPrefix(n.Node.Tag, "!!") || n.Node.Tag == "" {
-		n.Node.Tag = other.Node.Tag
-	}
-
+	n.Node.Tag = other.Node.Tag
 	n.Node.Alias = other.Node.Alias
-
-	if !prefs.DontOverWriteAnchor {
-		n.Node.Anchor = other.Node.Anchor
-	}
+	n.Node.Anchor = other.Node.Anchor
 
 	// merge will pickup the style of the new thing
 	// when autocreating nodes
-
 	if n.Node.Style == 0 {
 		n.Node.Style = other.Node.Style
 	}
@@ -177,9 +102,6 @@ func (n *CandidateNode) UpdateAttributesFrom(other *CandidateNode, prefs assignP
 	if other.Node.FootComment != "" {
 		n.Node.FootComment = other.Node.FootComment
 	}
-	if other.TrailingContent != "" {
-		n.TrailingContent = other.TrailingContent
-	}
 	if other.Node.HeadComment != "" {
 		n.Node.HeadComment = other.Node.HeadComment
 	}

pkg/yqlib/compare_operators.go

@@ -1,133 +0,0 @@
-package yqlib
-
-import (
-	"fmt"
-	"strconv"
-	"time"
-
-	yaml "gopkg.in/yaml.v3"
-)
-
-type compareTypePref struct {
-	OrEqual bool
-	Greater bool
-}
-
-func compareOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
-	log.Debugf("-- compareOperator")
-	prefs := expressionNode.Operation.Preferences.(compareTypePref)
-	return crossFunction(d, context.ReadOnlyClone(), expressionNode, compare(prefs), true)
-}
-
-func compare(prefs compareTypePref) func(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
-	return func(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
-		log.Debugf("-- compare cross function")
-		if lhs == nil && rhs == nil {
-			owner := &CandidateNode{}
-			return createBooleanCandidate(owner, prefs.OrEqual), nil
-		} else if lhs == nil {
-			log.Debugf("lhs nil, but rhs is not")
-			return createBooleanCandidate(rhs, false), nil
-		} else if rhs == nil {
-			log.Debugf("rhs nil, but rhs is not")
-			return createBooleanCandidate(lhs, false), nil
-		}
-
-		lhs.Node = unwrapDoc(lhs.Node)
-		rhs.Node = unwrapDoc(rhs.Node)
-
-		switch lhs.Node.Kind {
-		case yaml.MappingNode:
-			return nil, fmt.Errorf("maps not yet supported for comparison")
-		case yaml.SequenceNode:
-			return nil, fmt.Errorf("arrays not yet supported for comparison")
-		default:
-			if rhs.Node.Kind != yaml.ScalarNode {
-				return nil, fmt.Errorf("%v (%v) cannot be subtracted from %v", rhs.Node.Tag, rhs.Path, lhs.Node.Tag)
-			}
-			target := lhs.CreateReplacement(&yaml.Node{})
-			boolV, err := compareScalars(context, prefs, lhs.Node, rhs.Node)
-
-			return createBooleanCandidate(target, boolV), err
-		}
-	}
-}
-
-func compareDateTime(layout string, prefs compareTypePref, lhs *yaml.Node, rhs *yaml.Node) (bool, error) {
-	lhsTime, err := time.Parse(layout, lhs.Value)
-	if err != nil {
-		return false, err
-	}
-
-	rhsTime, err := time.Parse(layout, rhs.Value)
-	if err != nil {
-		return false, err
-	}
-
-	if prefs.OrEqual && lhsTime.Equal(rhsTime) {
-		return true, nil
-	}
-	if prefs.Greater {
-		return lhsTime.After(rhsTime), nil
-	}
-	return lhsTime.Before(rhsTime), nil
-
-}
-
-func compareScalars(context Context, prefs compareTypePref, lhs *yaml.Node, rhs *yaml.Node) (bool, error) {
-	lhsTag := guessTagFromCustomType(lhs)
-	rhsTag := guessTagFromCustomType(rhs)
-
-	isDateTime := lhs.Tag == "!!timestamp"
-	// if the lhs is a string, it might be a timestamp in a custom format.
-	if lhsTag == "!!str" && context.GetDateTimeLayout() != time.RFC3339 {
-		_, err := time.Parse(context.GetDateTimeLayout(), lhs.Value)
-		isDateTime = err == nil
-	}
-	if isDateTime {
-		return compareDateTime(context.GetDateTimeLayout(), prefs, lhs, rhs)
-	} else if lhsTag == "!!int" && rhsTag == "!!int" {
-		_, lhsNum, err := parseInt64(lhs.Value)
-		if err != nil {
-			return false, err
-		}
-		_, rhsNum, err := parseInt64(rhs.Value)
-		if err != nil {
-			return false, err
-		}
-
-		if prefs.OrEqual && lhsNum == rhsNum {
-			return true, nil
-		}
-		if prefs.Greater {
-			return lhsNum > rhsNum, nil
-		}
-		return lhsNum < rhsNum, nil
-	} else if (lhsTag == "!!int" || lhsTag == "!!float") && (rhsTag == "!!int" || rhsTag == "!!float") {
-		lhsNum, err := strconv.ParseFloat(lhs.Value, 64)
-		if err != nil {
-			return false, err
-		}
-		rhsNum, err := strconv.ParseFloat(rhs.Value, 64)
-		if err != nil {
-			return false, err
-		}
-		if prefs.OrEqual && lhsNum == rhsNum {
-			return true, nil
-		}
-		if prefs.Greater {
-			return lhsNum > rhsNum, nil
-		}
-		return lhsNum < rhsNum, nil
-	} else if lhsTag == "!!str" && rhsTag == "!!str" {
-		if prefs.OrEqual && lhs.Value == rhs.Value {
-			return true, nil
-		}
-		if prefs.Greater {
-			return lhs.Value > rhs.Value, nil
-		}
-		return lhs.Value < rhs.Value, nil
-	}
-
-	return false, fmt.Errorf("%v not yet supported for comparison", lhs.Tag)
-}

pkg/yqlib/compare_operators_test.go

@@ -1,371 +0,0 @@
-package yqlib
-
-import (
-	"testing"
-)
-
-var compareOperatorScenarios = []expressionScenario{
-	// ints, not equal
-	{
-		description: "Compare numbers (>)",
-		document:    "a: 5\nb: 4",
-		expression:  ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5\nb: 4",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:     true,
-		description: "Compare integers (>=)",
-		document:    "a: 5\nb: 4",
-		expression:  ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5\nb: 4",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-
-	// ints, equal
-	{
-		skipDoc:     true,
-		description: "Compare equal numbers (>)",
-		document:    "a: 5\nb: 5",
-		expression:  ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5\nb: 5",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		description: "Compare equal numbers (>=)",
-		document:    "a: 5\nb: 5",
-		expression:  ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5\nb: 5",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-
-	// floats, not equal
-	{
-		skipDoc:    true,
-		document:   "a: 5.2\nb: 4.1",
-		expression: ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.2\nb: 4.1",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.2\nb: 4.1",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.5\nb: 4.1",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-
-	// floats, equal
-	{
-		skipDoc:    true,
-		document:   "a: 5.5\nb: 5.5",
-		expression: ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.5\nb: 5.5",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.1\nb: 5.1",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 5.1\nb: 5.1",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-
-	// strings, not equal
-	{
-		description:    "Compare strings",
-		subdescription: "Compares strings by their bytecode.",
-		document:       "a: zoo\nb: apple",
-		expression:     ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: zoo\nb: apple",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: zoo\nb: apple",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: zoo\nb: apple",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-
-	// strings, equal
-	{
-		skipDoc:    true,
-		document:   "a: cat\nb: cat",
-		expression: ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: cat\nb: cat",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: cat\nb: cat",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: cat\nb: cat",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-
-	// datetime, not equal
-	{
-		description:    "Compare date times",
-		subdescription: "You can compare date times. Assumes RFC3339 date time format, see [date-time operators](https://mikefarah.gitbook.io/yq/operators/date-time-operators) for more information.",
-		document:       "a: 2021-01-01T03:10:00Z\nb: 2020-01-01T03:10:00Z",
-		expression:     ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2020-01-01T03:10:00Z",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2020-01-01T03:10:00Z",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2020-01-01T03:10:00Z",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-
-	// datetime, equal
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2021-01-01T03:10:00Z",
-		expression: ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2021-01-01T03:10:00Z",
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2021-01-01T03:10:00Z",
-		expression: ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   "a: 2021-01-01T03:10:00Z\nb: 2021-01-01T03:10:00Z",
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::true\n",
-		},
-	},
-	// both null
-	{
-		description: "Both sides are null: > is false",
-		expression:  ".a > .b",
-		expected: []string{
-			"D0, P[], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[], (!!bool)::false\n",
-		},
-	},
-	{
-		description: "Both sides are null: >= is true",
-		expression:  ".a >= .b",
-		expected: []string{
-			"D0, P[], (!!bool)::true\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[], (!!bool)::true\n",
-		},
-	},
-
-	// one null
-	{
-		skipDoc:     true,
-		description: "One side is null: > is false",
-		document:    `a: 5`,
-		expression:  ".a > .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   `a: 5`,
-		expression: ".a < .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:     true,
-		description: "One side is null: >= is false",
-		document:    `a: 5`,
-		expression:  ".a >= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   `a: 5`,
-		expression: ".a <= .b",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   `a: 5`,
-		expression: ".b <= .a",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-	{
-		skipDoc:    true,
-		document:   `a: 5`,
-		expression: ".b < .a",
-		expected: []string{
-			"D0, P[a], (!!bool)::false\n",
-		},
-	},
-}
-
-func TestCompareOperatorScenarios(t *testing.T) {
-	for _, tt := range compareOperatorScenarios {
-		testScenario(t, &tt)
-	}
-	documentOperatorScenarios(t, "compare", compareOperatorScenarios)
-}

pkg/yqlib/context.go

@@ -3,7 +3,6 @@ package yqlib
 import (
 	"container/list"
 	"fmt"
-	"time"
 
 	"github.com/jinzhu/copier"
 	logging "gopkg.in/op/go-logging.v1"
@@ -13,7 +12,6 @@ type Context struct {
 	MatchingNodes  *list.List
 	Variables      map[string]*list.List
 	DontAutoCreate bool
-	datetimeLayout string
 }
 
 func (n *Context) SingleReadonlyChildContext(candidate *CandidateNode) Context {
@@ -30,17 +28,6 @@ func (n *Context) SingleChildContext(candidate *CandidateNode) Context {
 	return n.ChildContext(list)
 }
 
-func (n *Context) SetDateTimeLayout(newDateTimeLayout string) {
-	n.datetimeLayout = newDateTimeLayout
-}
-
-func (n *Context) GetDateTimeLayout() string {
-	if n.datetimeLayout != "" {
-		return n.datetimeLayout
-	}
-	return time.RFC3339
-}
-
 func (n *Context) GetVariable(name string) *list.List {
 	if n.Variables == nil {
 		return nil
@@ -56,7 +43,7 @@ func (n *Context) SetVariable(name string, value *list.List) {
 }
 
 func (n *Context) ChildContext(results *list.List) Context {
-	clone := Context{DontAutoCreate: n.DontAutoCreate, datetimeLayout: n.datetimeLayout}
+	clone := Context{DontAutoCreate: n.DontAutoCreate}
 	clone.Variables = make(map[string]*list.List)
 	if len(n.Variables) > 0 {
 		err := copier.Copy(&clone.Variables, n.Variables)

pkg/yqlib/decoder.go

@@ -1,35 +0,0 @@
-package yqlib
-
-import (
-	"fmt"
-	"io"
-
-	yaml "gopkg.in/yaml.v3"
-)
-
-type InputFormat uint
-
-const (
-	YamlInputFormat = 1 << iota
-	XMLInputFormat
-	PropertiesInputFormat
-	Base64InputFormat
-)
-
-type Decoder interface {
-	Init(reader io.Reader)
-	Decode(node *yaml.Node) error
-}
-
-func InputFormatFromString(format string) (InputFormat, error) {
-	switch format {
-	case "yaml", "y":
-		return YamlInputFormat, nil
-	case "xml", "x":
-		return XMLInputFormat, nil
-	case "props", "p":
-		return PropertiesInputFormat, nil
-	default:
-		return 0, fmt.Errorf("unknown format '%v' please use [yaml|xml|props]", format)
-	}
-}

pkg/yqlib/decoder_base64.go

@@ -1,53 +0,0 @@
-package yqlib
-
-import (
-	"bytes"
-	"encoding/base64"
-	"io"
-
-	yaml "gopkg.in/yaml.v3"
-)
-
-type base64Decoder struct {
-	reader       io.Reader
-	finished     bool
-	readAnything bool
-	encoding     base64.Encoding
-}
-
-func NewBase64Decoder() Decoder {
-	return &base64Decoder{finished: false, encoding: *base64.StdEncoding}
-}
-
-func (dec *base64Decoder) Init(reader io.Reader) {
-	dec.reader = reader
-	dec.readAnything = false
-	dec.finished = false
-}
-
-func (dec *base64Decoder) Decode(rootYamlNode *yaml.Node) error {
-	if dec.finished {
-		return io.EOF
-	}
-	base64Reader := base64.NewDecoder(&dec.encoding, dec.reader)
-	buf := new(bytes.Buffer)
-
-	if _, err := buf.ReadFrom(base64Reader); err != nil {
-		return err
-	}
-	if buf.Len() == 0 {
-		dec.finished = true
-
-		// if we've read _only_ an empty string, lets return that
-		// otherwise if we've already read some bytes, and now we get
-		// an empty string, then we are done.
-		if dec.readAnything {
-			return io.EOF
-		}
-	}
-	dec.readAnything = true
-	rootYamlNode.Kind = yaml.ScalarNode
-	rootYamlNode.Tag = "!!str"
-	rootYamlNode.Value = buf.String()
-	return nil
-}

pkg/yqlib/decoder_properties.go

@@ -1,122 +0,0 @@
-package yqlib
-
-import (
-	"bytes"
-	"io"
-	"strconv"
-	"strings"
-
-	"github.com/magiconair/properties"
-	"gopkg.in/yaml.v3"
-)
-
-type propertiesDecoder struct {
-	reader   io.Reader
-	finished bool
-	d        DataTreeNavigator
-}
-
-func NewPropertiesDecoder() Decoder {
-	return &propertiesDecoder{d: NewDataTreeNavigator(), finished: false}
-}
-
-func (dec *propertiesDecoder) Init(reader io.Reader) {
-	dec.reader = reader
-	dec.finished = false
-}
-
-func parsePropKey(key string) []interface{} {
-	pathStrArray := strings.Split(key, ".")
-	path := make([]interface{}, len(pathStrArray))
-	for i, pathStr := range pathStrArray {
-		num, err := strconv.ParseInt(pathStr, 10, 32)
-		if err == nil {
-			path[i] = num
-		} else {
-			path[i] = pathStr
-		}
-	}
-	return path
-}
-
-func (dec *propertiesDecoder) processComment(c string) string {
-	if c == "" {
-		return ""
-	}
-	return "# " + c
-}
-
-func (dec *propertiesDecoder) applyProperty(properties *properties.Properties, context Context, key string) error {
-	value, _ := properties.Get(key)
-	path := parsePropKey(key)
-
-	rhsNode := &yaml.Node{
-		Value:       value,
-		Tag:         "!!str",
-		Kind:        yaml.ScalarNode,
-		LineComment: dec.processComment(properties.GetComment(key)),
-	}
-
-	rhsNode.Tag = guessTagFromCustomType(rhsNode)
-
-	rhsCandidateNode := &CandidateNode{
-		Path: path,
-		Node: rhsNode,
-	}
-
-	assignmentOp := &Operation{OperationType: assignOpType, Preferences: assignPreferences{}}
-
-	rhsOp := &Operation{OperationType: valueOpType, CandidateNode: rhsCandidateNode}
-
-	assignmentOpNode := &ExpressionNode{
-		Operation: assignmentOp,
-		LHS:       createTraversalTree(path, traversePreferences{}, false),
-		RHS:       &ExpressionNode{Operation: rhsOp},
-	}
-
-	_, err := dec.d.GetMatchingNodes(context, assignmentOpNode)
-	return err
-}
-
-func (dec *propertiesDecoder) Decode(rootYamlNode *yaml.Node) error {
-	if dec.finished {
-		return io.EOF
-	}
-	buf := new(bytes.Buffer)
-
-	if _, err := buf.ReadFrom(dec.reader); err != nil {
-		return err
-	}
-	if buf.Len() == 0 {
-		dec.finished = true
-		return io.EOF
-	}
-	properties, err := properties.LoadString(buf.String())
-	if err != nil {
-		return err
-	}
-	properties.DisableExpansion = true
-
-	rootMap := &CandidateNode{
-		Node: &yaml.Node{
-			Kind: yaml.MappingNode,
-			Tag:  "!!map",
-		},
-	}
-
-	context := Context{}
-	context = context.SingleChildContext(rootMap)
-
-	for _, key := range properties.Keys() {
-		if err := dec.applyProperty(properties, context, key); err != nil {
-			return err
-		}
-
-	}
-
-	rootYamlNode.Kind = yaml.DocumentNode
-	rootYamlNode.Content = []*yaml.Node{rootMap.Node}
-	dec.finished = true
-	return nil
-
-}

pkg/yqlib/decoder_test.go

@@ -1,60 +0,0 @@
-package yqlib
-
-import (
-	"bufio"
-	"bytes"
-	"strings"
-)
-
-type formatScenario struct {
-	input          string
-	indent         int
-	expression     string
-	expected       string
-	description    string
-	subdescription string
-	skipDoc        bool
-	scenarioType   string
-}
-
-func processFormatScenario(s formatScenario, decoder Decoder, encoder Encoder) string {
-
-	var output bytes.Buffer
-	writer := bufio.NewWriter(&output)
-
-	if decoder == nil {
-		decoder = NewYamlDecoder()
-	}
-
-	inputs, err := readDocuments(strings.NewReader(s.input), "sample.yml", 0, decoder)
-	if err != nil {
-		panic(err)
-	}
-
-	expression := s.expression
-	if expression == "" {
-		expression = "."
-	}
-
-	exp, err := getExpressionParser().ParseExpression(expression)
-
-	if err != nil {
-		panic(err)
-	}
-
-	context, err := NewDataTreeNavigator().GetMatchingNodes(Context{MatchingNodes: inputs}, exp)
-
-	if err != nil {
-		panic(err)
-	}
-
-	printer := NewPrinter(encoder, NewSinglePrinterWriter(writer))
-	err = printer.PrintResults(context.MatchingNodes)
-	if err != nil {
-		panic(err)
-	}
-	writer.Flush()
-
-	return output.String()
-
-}

pkg/yqlib/decoder_xml.go

@@ -1,348 +0,0 @@
-package yqlib
-
-import (
-	"encoding/xml"
-	"errors"
-	"io"
-	"strings"
-	"unicode"
-
-	"golang.org/x/net/html/charset"
-	yaml "gopkg.in/yaml.v3"
-)
-
-type xmlDecoder struct {
-	reader          io.Reader
-	readAnything    bool
-	attributePrefix string
-	contentName     string
-	strictMode      bool
-	keepNamespace   bool
-	useRawToken     bool
-	finished        bool
-}
-
-func NewXMLDecoder(attributePrefix string, contentName string, strictMode bool, keepNamespace bool, useRawToken bool) Decoder {
-	if contentName == "" {
-		contentName = "content"
-	}
-	return &xmlDecoder{
-		attributePrefix: attributePrefix,
-		contentName:     contentName,
-		finished:        false,
-		strictMode:      strictMode,
-		keepNamespace:   keepNamespace,
-		useRawToken:     useRawToken,
-	}
-}
-
-func (dec *xmlDecoder) Init(reader io.Reader) {
-	dec.reader = reader
-	dec.readAnything = false
-	dec.finished = false
-}
-
-func (dec *xmlDecoder) createSequence(nodes []*xmlNode) (*yaml.Node, error) {
-	yamlNode := &yaml.Node{Kind: yaml.SequenceNode}
-	for _, child := range nodes {
-		yamlChild, err := dec.convertToYamlNode(child)
-		if err != nil {
-			return nil, err
-		}
-		yamlNode.Content = append(yamlNode.Content, yamlChild)
-	}
-
-	return yamlNode, nil
-}
-
-func (dec *xmlDecoder) processComment(c string) string {
-	if c == "" {
-		return ""
-	}
-	return "#" + strings.TrimRight(c, " ")
-}
-
-func (dec *xmlDecoder) createMap(n *xmlNode) (*yaml.Node, error) {
-	log.Debug("createMap: headC: %v, footC: %v", n.HeadComment, n.FootComment)
-	yamlNode := &yaml.Node{Kind: yaml.MappingNode}
-
-	if len(n.Data) > 0 {
-		label := dec.contentName
-		labelNode := createScalarNode(label, label)
-		labelNode.HeadComment = dec.processComment(n.HeadComment)
-		labelNode.FootComment = dec.processComment(n.FootComment)
-		yamlNode.Content = append(yamlNode.Content, labelNode, createScalarNode(n.Data, n.Data))
-	}
-
-	for i, keyValuePair := range n.Children {
-		label := keyValuePair.K
-		children := keyValuePair.V
-		labelNode := createScalarNode(label, label)
-		var valueNode *yaml.Node
-		var err error
-
-		if i == 0 {
-			labelNode.HeadComment = dec.processComment(n.HeadComment)
-
-		}
-
-		// if i == len(n.Children)-1 {
-		labelNode.FootComment = dec.processComment(keyValuePair.FootComment)
-		// }
-
-		log.Debug("len of children in %v is %v", label, len(children))
-		if len(children) > 1 {
-			valueNode, err = dec.createSequence(children)
-			if err != nil {
-				return nil, err
-			}
-		} else {
-			// comment hack for maps of scalars
-			// if the value is a scalar, the head comment of the scalar needs to go on the key?
-			// add tests for <z/> as well as multiple <ds> of inputXmlWithComments > yaml
-			if len(children[0].Children) == 0 && children[0].HeadComment != "" {
-				labelNode.HeadComment = labelNode.HeadComment + "\n" + strings.TrimSpace(children[0].HeadComment)
-				children[0].HeadComment = ""
-			}
-			valueNode, err = dec.convertToYamlNode(children[0])
-			if err != nil {
-				return nil, err
-			}
-		}
-		yamlNode.Content = append(yamlNode.Content, labelNode, valueNode)
-	}
-
-	return yamlNode, nil
-}
-
-func (dec *xmlDecoder) convertToYamlNode(n *xmlNode) (*yaml.Node, error) {
-	if len(n.Children) > 0 {
-		return dec.createMap(n)
-	}
-	scalar := createScalarNode(n.Data, n.Data)
-	if n.Data == "" {
-		scalar = createScalarNode(nil, "")
-	}
-	log.Debug("scalar headC: %v, footC: %v", n.HeadComment, n.FootComment)
-	scalar.HeadComment = dec.processComment(n.HeadComment)
-	scalar.LineComment = dec.processComment(n.LineComment)
-	scalar.FootComment = dec.processComment(n.FootComment)
-
-	return scalar, nil
-}
-
-func (dec *xmlDecoder) Decode(rootYamlNode *yaml.Node) error {
-	if dec.finished {
-		return io.EOF
-	}
-	root := &xmlNode{}
-	// cant use xj - it doesn't keep map order.
-	err := dec.decodeXML(root)
-
-	if err != nil {
-		return err
-	}
-	firstNode, err := dec.convertToYamlNode(root)
-
-	if err != nil {
-		return err
-	} else if firstNode.Tag == "!!null" {
-		dec.finished = true
-		if dec.readAnything {
-			return io.EOF
-		}
-	}
-	dec.readAnything = true
-	rootYamlNode.Kind = yaml.DocumentNode
-	rootYamlNode.Content = []*yaml.Node{firstNode}
-	dec.finished = true
-	return nil
-}
-
-type xmlNode struct {
-	Children    []*xmlChildrenKv
-	HeadComment string
-	FootComment string
-	LineComment string
-	Data        string
-}
-
-type xmlChildrenKv struct {
-	K           string
-	V           []*xmlNode
-	FootComment string
-}
-
-// AddChild appends a node to the list of children
-func (n *xmlNode) AddChild(s string, c *xmlNode) {
-
-	if n.Children == nil {
-		n.Children = make([]*xmlChildrenKv, 0)
-	}
-	log.Debug("looking for %s", s)
-	// see if we can find an existing entry to add to
-	for _, childEntry := range n.Children {
-		if childEntry.K == s {
-			log.Debug("found it, appending an entry%s", s)
-			childEntry.V = append(childEntry.V, c)
-			log.Debug("yay len of children in %v is %v", s, len(childEntry.V))
-			return
-		}
-	}
-	log.Debug("not there, making a new one %s", s)
-	n.Children = append(n.Children, &xmlChildrenKv{K: s, V: []*xmlNode{c}})
-}
-
-type element struct {
-	parent *element
-	n      *xmlNode
-	label  string
-	state  string
-}
-
-// this code is heavily based on https://github.com/basgys/goxml2json
-// main changes are to decode into a structure that preserves the original order
-// of the map keys.
-func (dec *xmlDecoder) decodeXML(root *xmlNode) error {
-	xmlDec := xml.NewDecoder(dec.reader)
-	xmlDec.Strict = dec.strictMode
-	// That will convert the charset if the provided XML is non-UTF-8
-	xmlDec.CharsetReader = charset.NewReaderLabel
-
-	// Create first element from the root node
-	elem := &element{
-		parent: nil,
-		n:      root,
-	}
-
-	getToken := func() (xml.Token, error) {
-		if dec.useRawToken {
-			return xmlDec.RawToken()
-		}
-		return xmlDec.Token()
-	}
-
-	for {
-		t, e := getToken()
-		if e != nil && !errors.Is(e, io.EOF) {
-			return e
-		}
-		if t == nil {
-			break
-		}
-
-		switch se := t.(type) {
-		case xml.StartElement:
-			log.Debug("start element %v", se.Name.Local)
-			elem.state = "started"
-			// Build new a new current element and link it to its parent
-			elem = &element{
-				parent: elem,
-				n:      &xmlNode{},
-				label:  se.Name.Local,
-			}
-
-			// Extract attributes as children
-			for _, a := range se.Attr {
-				if dec.keepNamespace {
-					if a.Name.Space != "" {
-						a.Name.Local = a.Name.Space + ":" + a.Name.Local
-					}
-				}
-				elem.n.AddChild(dec.attributePrefix+a.Name.Local, &xmlNode{Data: a.Value})
-			}
-		case xml.CharData:
-			// Extract XML data (if any)
-			elem.n.Data = trimNonGraphic(string(se))
-			if elem.n.Data != "" {
-				elem.state = "chardata"
-				log.Debug("chardata [%v] for %v", elem.n.Data, elem.label)
-			}
-		case xml.EndElement:
-			log.Debug("end element %v", elem.label)
-			elem.state = "finished"
-			// And add it to its parent list
-			if elem.parent != nil {
-				elem.parent.n.AddChild(elem.label, elem.n)
-			}
-
-			// Then change the current element to its parent
-			elem = elem.parent
-		case xml.Comment:
-
-			commentStr := string(xml.CharData(se))
-			if elem.state == "started" {
-				applyFootComment(elem, commentStr)
-
-			} else if elem.state == "chardata" {
-				log.Debug("got a line comment for (%v) %v: [%v]", elem.state, elem.label, commentStr)
-				elem.n.LineComment = joinFilter([]string{elem.n.LineComment, commentStr})
-			} else {
-				log.Debug("got a head comment for (%v) %v: [%v]", elem.state, elem.label, commentStr)
-				elem.n.HeadComment = joinFilter([]string{elem.n.HeadComment, commentStr})
-			}
-
-		}
-	}
-
-	return nil
-}
-
-func applyFootComment(elem *element, commentStr string) {
-
-	// first lets try to put the comment on the last child
-	if len(elem.n.Children) > 0 {
-		lastChildIndex := len(elem.n.Children) - 1
-		childKv := elem.n.Children[lastChildIndex]
-		log.Debug("got a foot comment for %v: [%v]", childKv.K, commentStr)
-		childKv.FootComment = joinFilter([]string{elem.n.FootComment, commentStr})
-	} else {
-		log.Debug("got a foot comment for %v: [%v]", elem.label, commentStr)
-		elem.n.FootComment = joinFilter([]string{elem.n.FootComment, commentStr})
-	}
-}
-
-func joinFilter(rawStrings []string) string {
-	stringsToJoin := make([]string, 0)
-	for _, str := range rawStrings {
-		if str != "" {
-			stringsToJoin = append(stringsToJoin, str)
-		}
-	}
-	return strings.Join(stringsToJoin, " ")
-}
-
-// trimNonGraphic returns a slice of the string s, with all leading and trailing
-// non graphic characters and spaces removed.
-//
-// Graphic characters include letters, marks, numbers, punctuation, symbols,
-// and spaces, from categories L, M, N, P, S, Zs.
-// Spacing characters are set by category Z and property Pattern_White_Space.
-func trimNonGraphic(s string) string {
-	if s == "" {
-		return s
-	}
-
-	var first *int
-	var last int
-	for i, r := range []rune(s) {
-		if !unicode.IsGraphic(r) || unicode.IsSpace(r) {
-			continue
-		}
-
-		if first == nil {
-			f := i // copy i
-			first = &f
-			last = i
-		} else {
-			last = i
-		}
-	}
-
-	// If first is nil, it means there are no graphic characters
-	if first == nil {
-		return ""
-	}
-
-	return string([]rune(s)[*first : last+1])
-}

pkg/yqlib/decoder_yaml.go

@@ -1,23 +0,0 @@
-package yqlib
-
-import (
-	"io"
-
-	yaml "gopkg.in/yaml.v3"
-)
-
-type yamlDecoder struct {
-	decoder yaml.Decoder
-}
-
-func NewYamlDecoder() Decoder {
-	return &yamlDecoder{}
-}
-
-func (dec *yamlDecoder) Init(reader io.Reader) {
-	dec.decoder = *yaml.NewDecoder(reader)
-}
-
-func (dec *yamlDecoder) Decode(rootYamlNode *yaml.Node) error {
-	return dec.decoder.Decode(rootYamlNode)
-}

pkg/yqlib/doc/add.md

@@ -0,0 +1,267 @@
+# Add
+
+Add behaves differently according to the type of the LHS:
+* arrays: concatenate
+* number scalars: arithmetic addition
+* string scalars: concatenate
+
+Use `+=` as append assign for things like increment. Note that `.a += .x` is equivalent to running `.a = .a + .x`.
+
+## Concatenate and assign arrays
+Given a sample.yml file of:
+```yaml
+a:
+  val: thing
+  b:
+    - cat
+    - dog
+```
+then
+```bash
+yq eval '.a.b += ["cow"]' sample.yml
+```
+will output
+```yaml
+a:
+  val: thing
+  b:
+    - cat
+    - dog
+    - cow
+```
+
+## Concatenate arrays
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+b:
+  - 3
+  - 4
+```
+then
+```bash
+yq eval '.a + .b' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+- 3
+- 4
+```
+
+## Concatenate null to array
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+```
+then
+```bash
+yq eval '.a + null' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+```
+
+## Add new object to array
+Given a sample.yml file of:
+```yaml
+a:
+  - dog: woof
+```
+then
+```bash
+yq eval '.a + {"cat": "meow"}' sample.yml
+```
+will output
+```yaml
+- dog: woof
+- cat: meow
+```
+
+## Add string to array
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+```
+then
+```bash
+yq eval '.a + "hello"' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+- hello
+```
+
+## Append to array
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+b:
+  - 3
+  - 4
+```
+then
+```bash
+yq eval '.a = .a + .b' sample.yml
+```
+will output
+```yaml
+a:
+  - 1
+  - 2
+  - 3
+  - 4
+b:
+  - 3
+  - 4
+```
+
+## Append another array using +=
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+b:
+  - 3
+  - 4
+```
+then
+```bash
+yq eval '.a += .b' sample.yml
+```
+will output
+```yaml
+a:
+  - 1
+  - 2
+  - 3
+  - 4
+b:
+  - 3
+  - 4
+```
+
+## Relative append
+Given a sample.yml file of:
+```yaml
+a:
+  a1:
+    b:
+      - cat
+  a2:
+    b:
+      - dog
+  a3: {}
+```
+then
+```bash
+yq eval '.a[].b += ["mouse"]' sample.yml
+```
+will output
+```yaml
+a:
+  a1:
+    b:
+      - cat
+      - mouse
+  a2:
+    b:
+      - dog
+      - mouse
+  a3: {b: [mouse]}
+```
+
+## String concatenation
+Given a sample.yml file of:
+```yaml
+a: cat
+b: meow
+```
+then
+```bash
+yq eval '.a = .a + .b' sample.yml
+```
+will output
+```yaml
+a: catmeow
+b: meow
+```
+
+## Number addition - float
+If the lhs or rhs are floats then the expression will be calculated with floats.
+
+Given a sample.yml file of:
+```yaml
+a: 3
+b: 4.9
+```
+then
+```bash
+yq eval '.a = .a + .b' sample.yml
+```
+will output
+```yaml
+a: 7.9
+b: 4.9
+```
+
+## Number addition - int
+If both the lhs and rhs are ints then the expression will be calculated with ints.
+
+Given a sample.yml file of:
+```yaml
+a: 3
+b: 4
+```
+then
+```bash
+yq eval '.a = .a + .b' sample.yml
+```
+will output
+```yaml
+a: 7
+b: 4
+```
+
+## Increment numbers
+Given a sample.yml file of:
+```yaml
+a: 3
+b: 5
+```
+then
+```bash
+yq eval '.[] += 1' sample.yml
+```
+will output
+```yaml
+a: 4
+b: 6
+```
+
+## Add to null
+Adding to null simply returns the rhs
+
+Running
+```bash
+yq eval --null-input 'null + "cat"'
+```
+will output
+```yaml
+cat
+```
+

pkg/yqlib/doc/alternative-default-value.md

@@ -2,12 +2,6 @@
 
 This operator is used to provide alternative (or default) values when a particular expression is either null or false.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## LHS is defined
 Given a sample.yml file of:
 ```yaml
@@ -15,7 +9,7 @@ a: bridge
 ```
 then
 ```bash
-yq '.a // "hello"' sample.yml
+yq eval '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -29,7 +23,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.a // "hello"' sample.yml
+yq eval '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -43,7 +37,7 @@ a: ~
 ```
 then
 ```bash
-yq '.a // "hello"' sample.yml
+yq eval '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -57,7 +51,7 @@ a: false
 ```
 then
 ```bash
-yq '.a // "hello"' sample.yml
+yq eval '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -72,7 +66,7 @@ b: cat
 ```
 then
 ```bash
-yq '.a // .b' sample.yml
+yq eval '.a // .b' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/anchor-and-alias-operators.md

@@ -5,12 +5,6 @@ Use the `alias` and `anchor` operators to read and write yaml aliases and anchor
 `yq` supports merge aliases (like `<<: *blah`) however this is no longer in the standard yaml spec (1.2) and so `yq` will automatically add the `!!merge` tag to these nodes as it is effectively a custom tag.
 
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified.&#x20;
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Merge one map
 see https://yaml.org/type/merge.html
 
@@ -31,7 +25,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[4] | explode(.)' sample.yml
+yq eval '.[4] | explode(.)' sample.yml
 ```
 will output
 ```yaml
@@ -61,7 +55,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[4] | explode(.)' sample.yml
+yq eval '.[4] | explode(.)' sample.yml
 ```
 will output
 ```yaml
@@ -93,7 +87,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[4] | explode(.)' sample.yml
+yq eval '.[4] | explode(.)' sample.yml
 ```
 will output
 ```yaml
@@ -109,7 +103,7 @@ a: &billyBob cat
 ```
 then
 ```bash
-yq '.a | anchor' sample.yml
+yq eval '.a | anchor' sample.yml
 ```
 will output
 ```yaml
@@ -123,7 +117,7 @@ a: cat
 ```
 then
 ```bash
-yq '.a anchor = "foobar"' sample.yml
+yq eval '.a anchor = "foobar"' sample.yml
 ```
 will output
 ```yaml
@@ -138,7 +132,7 @@ a:
 ```
 then
 ```bash
-yq '.a anchor |= .b' sample.yml
+yq eval '.a anchor |= .b' sample.yml
 ```
 will output
 ```yaml
@@ -154,7 +148,7 @@ a: *billyBob
 ```
 then
 ```bash
-yq '.a | alias' sample.yml
+yq eval '.a | alias' sample.yml
 ```
 will output
 ```yaml
@@ -169,7 +163,7 @@ a: cat
 ```
 then
 ```bash
-yq '.a alias = "meow"' sample.yml
+yq eval '.a alias = "meow"' sample.yml
 ```
 will output
 ```yaml
@@ -185,7 +179,7 @@ a: cat
 ```
 then
 ```bash
-yq '.a alias = ""' sample.yml
+yq eval '.a alias = ""' sample.yml
 ```
 will output
 ```yaml
@@ -202,7 +196,7 @@ a:
 ```
 then
 ```bash
-yq '.a alias |= .f' sample.yml
+yq eval '.a alias |= .f' sample.yml
 ```
 will output
 ```yaml
@@ -219,7 +213,7 @@ f:
 ```
 then
 ```bash
-yq 'explode(.f)' sample.yml
+yq eval 'explode(.f)' sample.yml
 ```
 will output
 ```yaml
@@ -235,7 +229,7 @@ a: mike
 ```
 then
 ```bash
-yq 'explode(.a)' sample.yml
+yq eval 'explode(.a)' sample.yml
 ```
 will output
 ```yaml
@@ -251,7 +245,7 @@ f:
 ```
 then
 ```bash
-yq 'explode(.f)' sample.yml
+yq eval 'explode(.f)' sample.yml
 ```
 will output
 ```yaml
@@ -284,7 +278,7 @@ foobar:
 ```
 then
 ```bash
-yq 'explode(.)' sample.yml
+yq eval 'explode(.)' sample.yml
 ```
 will output
 ```yaml
@@ -323,7 +317,7 @@ thingTwo:
 ```
 then
 ```bash
-yq '.thingOne |= explode(.) * {"value": false}' sample.yml
+yq eval '.thingOne |= explode(.) * {"value": false}' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/assign-update.md

@@ -7,16 +7,10 @@ Which will assign the LHS node values to the RHS node values. The RHS expression
 
 ### relative form: `|=`
 This will do a similar thing to the plain form, however, the RHS expression is run against _the LHS nodes_. This is useful for updating values based on old values, e.g. increment.
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Create yaml file
 Running
 ```bash
-yq --null-input '.a.b = "cat" | .x = "frog"'
+yq eval --null-input '.a.b = "cat" | .x = "frog"'
 ```
 will output
 ```yaml
@@ -34,7 +28,7 @@ a:
 ```
 then
 ```bash
-yq '.a |= .b' sample.yml
+yq eval '.a |= .b' sample.yml
 ```
 will output
 ```yaml
@@ -51,7 +45,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] |= . * 2' sample.yml
+yq eval '.[] |= . * 2' sample.yml
 ```
 will output
 ```yaml
@@ -90,7 +84,7 @@ b: sibling
 ```
 then
 ```bash
-yq '.a = .b' sample.yml
+yq eval '.a = .b' sample.yml
 ```
 will output
 ```yaml
@@ -107,13 +101,13 @@ c: fieldC
 ```
 then
 ```bash
-yq '(.a, .c) = "potato"' sample.yml
+yq eval '(.a, .c) = "potatoe"' sample.yml
 ```
 will output
 ```yaml
-a: potato
+a: potatoe
 b: fieldB
-c: potato
+c: potatoe
 ```
 
 ## Update string value
@@ -124,7 +118,7 @@ a:
 ```
 then
 ```bash
-yq '.a.b = "frog"' sample.yml
+yq eval '.a.b = "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -142,7 +136,7 @@ a:
 ```
 then
 ```bash
-yq '.a.b |= "frog"' sample.yml
+yq eval '.a.b |= "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -151,7 +145,7 @@ a:
 ```
 
 ## Update deeply selected results
-Note that the LHS is wrapped in brackets! This is to ensure we don't first filter out the yaml and then update the snippet.
+Note that the LHS is wrapped in brackets! This is to ensure we dont first filter out the yaml and then update the snippet.
 
 Given a sample.yml file of:
 ```yaml
@@ -161,7 +155,7 @@ a:
 ```
 then
 ```bash
-yq '(.a[] | select(. == "apple")) = "frog"' sample.yml
+yq eval '(.a[] | select(. == "apple")) = "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -179,7 +173,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '(.[] | select(. == "*andy")) = "bogs"' sample.yml
+yq eval '(.[] | select(. == "*andy")) = "bogs"' sample.yml
 ```
 will output
 ```yaml
@@ -195,28 +189,11 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.a.b |= "bogs"' sample.yml
+yq eval '.a.b |= "bogs"' sample.yml
 ```
 will output
 ```yaml
-a:
-  b: bogs
-```
-
-## Update node value that has an anchor
-Anchor will remaple
-
-Given a sample.yml file of:
-```yaml
-a: &cool cat
-```
-then
-```bash
-yq '.a = "dog"' sample.yml
-```
-will output
-```yaml
-a: &cool dog
+{a: {b: bogs}}
 ```
 
 ## Update empty object and array
@@ -226,12 +203,10 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.a.b.[0] |= "bogs"' sample.yml
+yq eval '.a.b.[0] |= "bogs"' sample.yml
 ```
 will output
 ```yaml
-a:
-  b:
-    - bogs
+{a: {b: [bogs]}}
 ```
 

pkg/yqlib/doc/boolean-operators.md

@@ -10,22 +10,10 @@ The `or` and `and` operators take two parameters and return a boolean result.
 
 These are most commonly used with the `select` operator to filter particular nodes.
 
-## Related Operators
-
-- equals / not equals (`==`, `!=`) operators [here](https://mikefarah.gitbook.io/yq/operators/equals)
-- comparison (`>=`, `<` etc) operators [here](https://mikefarah.gitbook.io/yq/operators/compare)
-- select operator [here](https://mikefarah.gitbook.io/yq/operators/select)
-
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified.&#x20;
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## `or` example
 Running
 ```bash
-yq --null-input 'true or false'
+yq eval --null-input 'true or false'
 ```
 will output
 ```yaml
@@ -35,7 +23,7 @@ true
 ## `and` example
 Running
 ```bash
-yq --null-input 'true and false'
+yq eval --null-input 'true and false'
 ```
 will output
 ```yaml
@@ -54,7 +42,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '[.[] | select(.a == "cat" or .b == "dog")]' sample.yml
+yq eval '[.[] | select(.a == "cat" or .b == "dog")]' sample.yml
 ```
 will output
 ```yaml
@@ -72,7 +60,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'any' sample.yml
+yq eval 'any' sample.yml
 ```
 will output
 ```yaml
@@ -86,7 +74,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'any' sample.yml
+yq eval 'any' sample.yml
 ```
 will output
 ```yaml
@@ -105,7 +93,7 @@ b:
 ```
 then
 ```bash
-yq '.[] |= any_c(. == "awesome")' sample.yml
+yq eval '.[] |= any_c(. == "awesome")' sample.yml
 ```
 will output
 ```yaml
@@ -121,7 +109,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'all' sample.yml
+yq eval 'all' sample.yml
 ```
 will output
 ```yaml
@@ -135,7 +123,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'all' sample.yml
+yq eval 'all' sample.yml
 ```
 will output
 ```yaml
@@ -154,7 +142,7 @@ b:
 ```
 then
 ```bash
-yq '.[] |= all_c(tag == "!!str")' sample.yml
+yq eval '.[] |= all_c(tag == "!!str")' sample.yml
 ```
 will output
 ```yaml
@@ -165,7 +153,7 @@ b: false
 ## Not true is false
 Running
 ```bash
-yq --null-input 'true | not'
+yq eval --null-input 'true | not'
 ```
 will output
 ```yaml
@@ -175,7 +163,7 @@ false
 ## Not false is true
 Running
 ```bash
-yq --null-input 'false | not'
+yq eval --null-input 'false | not'
 ```
 will output
 ```yaml
@@ -185,7 +173,7 @@ true
 ## String values considered to be true
 Running
 ```bash
-yq --null-input '"cat" | not'
+yq eval --null-input '"cat" | not'
 ```
 will output
 ```yaml
@@ -195,7 +183,7 @@ false
 ## Empty string value considered to be true
 Running
 ```bash
-yq --null-input '"" | not'
+yq eval --null-input '"" | not'
 ```
 will output
 ```yaml
@@ -205,7 +193,7 @@ false
 ## Numbers are considered to be true
 Running
 ```bash
-yq --null-input '1 | not'
+yq eval --null-input '1 | not'
 ```
 will output
 ```yaml
@@ -215,7 +203,7 @@ false
 ## Zero is considered to be true
 Running
 ```bash
-yq --null-input '0 | not'
+yq eval --null-input '0 | not'
 ```
 will output
 ```yaml
@@ -225,7 +213,7 @@ false
 ## Null is considered to be false
 Running
 ```bash
-yq --null-input '~ | not'
+yq eval --null-input '~ | not'
 ```
 will output
 ```yaml

pkg/yqlib/doc/collect-into-array.md

@@ -3,16 +3,10 @@
 This creates an array using the expression between the square brackets.
 
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Collect empty
 Running
 ```bash
-yq --null-input '[]'
+yq eval --null-input '[]'
 ```
 will output
 ```yaml
@@ -22,7 +16,7 @@ will output
 ## Collect single
 Running
 ```bash
-yq --null-input '["cat"]'
+yq eval --null-input '["cat"]'
 ```
 will output
 ```yaml
@@ -37,7 +31,7 @@ b: dog
 ```
 then
 ```bash
-yq '[.a, .b]' sample.yml
+yq eval '[.a, .b]' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/comment-operators.md

@@ -10,12 +10,6 @@ This will assign the LHS nodes comments to the expression on the RHS. The RHS is
 ### relative form: `|=` 
 Similar to the plain form, however the RHS evaluates against each matching LHS node! This is useful if you want to set the comments as a relative expression of the node, for instance its value or path.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Set line comment
 Given a sample.yml file of:
 ```yaml
@@ -23,7 +17,7 @@ a: cat
 ```
 then
 ```bash
-yq '.a line_comment="single"' sample.yml
+yq eval '.a lineComment="single"' sample.yml
 ```
 will output
 ```yaml
@@ -38,7 +32,7 @@ b: dog
 ```
 then
 ```bash
-yq '.. line_comment |= .' sample.yml
+yq eval '.. lineComment |= .' sample.yml
 ```
 will output
 ```yaml
@@ -53,7 +47,7 @@ a: cat
 ```
 then
 ```bash
-yq '. head_comment="single"' sample.yml
+yq eval '. headComment="single"' sample.yml
 ```
 will output
 ```yaml
@@ -69,11 +63,12 @@ a: cat
 ```
 then
 ```bash
-yq '. foot_comment=.a' sample.yml
+yq eval '. footComment=.a' sample.yml
 ```
 will output
 ```yaml
 a: cat
+
 # cat
 ```
 
@@ -85,7 +80,7 @@ b: dog # leave this
 ```
 then
 ```bash
-yq '.a line_comment=""' sample.yml
+yq eval '.a lineComment=""' sample.yml
 ```
 will output
 ```yaml
@@ -104,7 +99,7 @@ b: # key comment
 ```
 then
 ```bash
-yq '... comments=""' sample.yml
+yq eval '... comments=""' sample.yml
 ```
 will output
 ```yaml
@@ -116,11 +111,10 @@ b:
 Given a sample.yml file of:
 ```yaml
 a: cat # meow
-# have a great day
 ```
 then
 ```bash
-yq '.a | line_comment' sample.yml
+yq eval '.a | lineComment' sample.yml
 ```
 will output
 ```yaml
@@ -138,14 +132,14 @@ a: cat # meow
 ```
 then
 ```bash
-yq '. | head_comment' sample.yml
+yq eval '. | headComment' sample.yml
 ```
 will output
 ```yaml
 welcome!
 ```
 
-## Head comment with document split
+## 
 Given a sample.yml file of:
 ```yaml
 # welcome!
@@ -157,7 +151,7 @@ a: cat # meow
 ```
 then
 ```bash
-yq 'head_comment' sample.yml
+yq eval 'headComment' sample.yml
 ```
 will output
 ```yaml
@@ -177,7 +171,7 @@ a: cat # meow
 ```
 then
 ```bash
-yq '. | foot_comment' sample.yml
+yq eval '. | footComment' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/contains.md

@@ -2,12 +2,6 @@
 
 This returns `true` if the context contains the passed in parameter, and false otherwise.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Array contains array
 Array is equal or subset of
 
@@ -19,7 +13,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'contains(["baz", "bar"])' sample.yml
+yq eval 'contains(["baz", "bar"])' sample.yml
 ```
 will output
 ```yaml
@@ -38,7 +32,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'contains({"bar": [{"barp": 12}]})' sample.yml
+yq eval 'contains({"bar": [{"barp": 12}]})' sample.yml
 ```
 will output
 ```yaml
@@ -57,7 +51,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'contains({"foo": 12, "bar": [{"barp": 15}]})' sample.yml
+yq eval 'contains({"foo": 12, "bar": [{"barp": 15}]})' sample.yml
 ```
 will output
 ```yaml
@@ -71,7 +65,7 @@ foobar
 ```
 then
 ```bash
-yq 'contains("bar")' sample.yml
+yq eval 'contains("bar")' sample.yml
 ```
 will output
 ```yaml
@@ -85,7 +79,7 @@ meow
 ```
 then
 ```bash
-yq 'contains("meow")' sample.yml
+yq eval 'contains("meow")' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/create-collect-into-object.md

@@ -2,16 +2,10 @@
 
 This is used to construct objects (or maps). This can be used against existing yaml, or to create fresh yaml documents.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Collect empty object
 Running
 ```bash
-yq --null-input '{}'
+yq eval --null-input '{}'
 ```
 will output
 ```yaml
@@ -25,7 +19,7 @@ name: Mike
 ```
 then
 ```bash
-yq '{"wrap": .}' sample.yml
+yq eval '{"wrap": .}' sample.yml
 ```
 will output
 ```yaml
@@ -43,7 +37,7 @@ pets:
 ```
 then
 ```bash
-yq '{.name: .pets.[]}' sample.yml
+yq eval '{.name: .pets.[]}' sample.yml
 ```
 will output
 ```yaml
@@ -66,7 +60,7 @@ pets:
 ```
 then
 ```bash
-yq '{.name: .pets.[]}' sample.yml
+yq eval '{.name: .pets.[]}' sample.yml
 ```
 will output
 ```yaml
@@ -79,23 +73,10 @@ Rosey: sheep
 ## Creating yaml from scratch
 Running
 ```bash
-yq --null-input '{"wrap": "frog"}'
+yq eval --null-input '{"wrap": "frog"}'
 ```
 will output
 ```yaml
 wrap: frog
 ```
 
-## Creating yaml from scratch with multiple objects
-Running
-```bash
-yq --null-input '(.a.b = "foo") | (.d.e = "bar")'
-```
-will output
-```yaml
-a:
-  b: foo
-d:
-  e: bar
-```
-

pkg/yqlib/doc/delete.md

@@ -2,12 +2,6 @@
 
 Deletes matching entries in maps or arrays.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Delete entry in map
 Given a sample.yml file of:
 ```yaml
@@ -16,7 +10,7 @@ b: dog
 ```
 then
 ```bash
-yq 'del(.b)' sample.yml
+yq eval 'del(.b)' sample.yml
 ```
 will output
 ```yaml
@@ -32,7 +26,7 @@ a:
 ```
 then
 ```bash
-yq 'del(.a.a1)' sample.yml
+yq eval 'del(.a.a1)' sample.yml
 ```
 will output
 ```yaml
@@ -49,7 +43,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'del(.[1])' sample.yml
+yq eval 'del(.[1])' sample.yml
 ```
 will output
 ```yaml
@@ -65,7 +59,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'del(.[0].a)' sample.yml
+yq eval 'del(.[0].a)' sample.yml
 ```
 will output
 ```yaml
@@ -80,7 +74,7 @@ b: dog
 ```
 then
 ```bash
-yq 'del(.c)' sample.yml
+yq eval 'del(.c)' sample.yml
 ```
 will output
 ```yaml
@@ -97,7 +91,7 @@ c: bat
 ```
 then
 ```bash
-yq 'del( .[] | select(. == "*at") )' sample.yml
+yq eval 'del( .[] | select(. == "*at") )' sample.yml
 ```
 will output
 ```yaml
@@ -115,7 +109,7 @@ a:
 ```
 then
 ```bash
-yq 'del(.. | select(has("name")).name)' sample.yml
+yq eval 'del(.. | select(has("name")).name)' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/document-index.md

@@ -2,12 +2,6 @@
 
 Use the `documentIndex` operator (or the `di` shorthand) to select nodes of a particular document.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Retrieve a document index
 Given a sample.yml file of:
 ```yaml
@@ -17,7 +11,7 @@ a: frog
 ```
 then
 ```bash
-yq '.a | document_index' sample.yml
+yq eval '.a | documentIndex' sample.yml
 ```
 will output
 ```yaml
@@ -35,7 +29,7 @@ a: frog
 ```
 then
 ```bash
-yq '.a | di' sample.yml
+yq eval '.a | di' sample.yml
 ```
 will output
 ```yaml
@@ -53,7 +47,7 @@ a: frog
 ```
 then
 ```bash
-yq 'select(document_index == 1)' sample.yml
+yq eval 'select(documentIndex == 1)' sample.yml
 ```
 will output
 ```yaml
@@ -69,7 +63,7 @@ a: frog
 ```
 then
 ```bash
-yq 'select(di == 1)' sample.yml
+yq eval 'select(di == 1)' sample.yml
 ```
 will output
 ```yaml
@@ -85,7 +79,7 @@ a: frog
 ```
 then
 ```bash
-yq '.a | ({"match": ., "doc": document_index})' sample.yml
+yq eval '.a | ({"match": ., "doc": documentIndex})' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/encode-decode.md

@@ -0,0 +1,180 @@
+# Encoder / Decoder
+
+Encode operators will take the piped in object structure and encode it as a string in the desired format. The decode operators do the opposite, they take a formatted string and decode it into the relevant object structure.
+
+Note that you can optionally pass an indent value to the encode functions (see below).
+
+These operators are useful to process yaml documents that have stringified embeded yaml/json/props in them.
+
+## Encode value as yaml string
+Indent defaults to 2
+
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    bob: dylan
+```
+then
+```bash
+yq eval '.b = (.a | to_yaml)' sample.yml
+```
+will output
+```yaml
+a:
+  cool:
+    bob: dylan
+b: |
+  cool:
+    bob: dylan
+```
+
+## Encode value as yaml string, with custom indentation
+You can specify the indentation level as the first parameter.
+
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    bob: dylan
+```
+then
+```bash
+yq eval '.b = (.a | to_yaml(8))' sample.yml
+```
+will output
+```yaml
+a:
+  cool:
+    bob: dylan
+b: |
+  cool:
+          bob: dylan
+```
+
+## Encode value as yaml string, using toyaml
+Does the same thing as to_yaml, matching jq naming convention.
+
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq eval '.b = (.a | to_yaml)' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: |
+  cool: thing
+```
+
+## Encode value as json string
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq eval '.b = (.a | to_json)' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: |
+  {
+    "cool": "thing"
+  }
+```
+
+## Encode value as json string, on one line
+Pass in a 0 indent to print json on a single line.
+
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq eval '.b = (.a | to_json(0))' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: '{"cool":"thing"}'
+```
+
+## Encode value as props string
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq eval '.b = (.a | to_props)' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: |
+  cool = thing
+```
+
+## Decode a yaml encoded string
+Given a sample.yml file of:
+```yaml
+a: 'foo: bar'
+```
+then
+```bash
+yq eval '.b = (.a | from_yaml)' sample.yml
+```
+will output
+```yaml
+a: 'foo: bar'
+b:
+  foo: bar
+```
+
+## Update a multiline encoded yaml string
+Given a sample.yml file of:
+```yaml
+a: |
+  foo: bar
+  baz: dog
+
+```
+then
+```bash
+yq eval '.a |= (from_yaml | .foo = "cat" | to_yaml)' sample.yml
+```
+will output
+```yaml
+a: |
+  foo: cat
+  baz: dog
+```
+
+## Update a single line encoded yaml string
+Given a sample.yml file of:
+```yaml
+a: 'foo: bar'
+```
+then
+```bash
+yq eval '.a |= (from_yaml | .foo = "cat" | to_yaml)' sample.yml
+```
+will output
+```yaml
+a: 'foo: cat'
+```
+

pkg/yqlib/doc/entries.md

@@ -2,12 +2,6 @@
 
 Similar to the same named functions in `jq` these functions convert to/from an object and an array of key-value pairs. This is most useful for performing operations on keys of maps.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## to_entries Map
 Given a sample.yml file of:
 ```yaml
@@ -16,7 +10,7 @@ b: 2
 ```
 then
 ```bash
-yq 'to_entries' sample.yml
+yq eval 'to_entries' sample.yml
 ```
 will output
 ```yaml
@@ -34,7 +28,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'to_entries' sample.yml
+yq eval 'to_entries' sample.yml
 ```
 will output
 ```yaml
@@ -51,7 +45,7 @@ null
 ```
 then
 ```bash
-yq 'to_entries' sample.yml
+yq eval 'to_entries' sample.yml
 ```
 will output
 ```yaml
@@ -65,7 +59,7 @@ b: 2
 ```
 then
 ```bash
-yq 'to_entries | from_entries' sample.yml
+yq eval 'to_entries | from_entries' sample.yml
 ```
 will output
 ```yaml
@@ -83,7 +77,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'to_entries | from_entries' sample.yml
+yq eval 'to_entries | from_entries' sample.yml
 ```
 will output
 ```yaml
@@ -99,7 +93,7 @@ b: 2
 ```
 then
 ```bash
-yq 'with_entries(.key |= "KEY_" + .)' sample.yml
+yq eval 'with_entries(.key |= "KEY_" + .)' sample.yml
 ```
 will output
 ```yaml
@@ -117,7 +111,7 @@ c:
 ```
 then
 ```bash
-yq 'with_entries(select(.value | has("b")))' sample.yml
+yq eval 'with_entries(select(.value | has("b")))' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/env-variable-operators.md

@@ -0,0 +1,79 @@
+# Env Variable Operators
+
+This operator is used to handle environment variables usage in path expressions. While environment variables can, of course, be passed in via your CLI with string interpolation, this often comes with complex quote escaping and can be tricky to write and read. Note that there are two forms, `env` which will parse the environment variable as a yaml (be it a map, array, string, number of boolean) and `strenv` which will always parse the argument as a string.
+
+## Read string environment variable
+Running
+```bash
+myenv="cat meow" yq eval --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: cat meow
+```
+
+## Read boolean environment variable
+Running
+```bash
+myenv="true" yq eval --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: true
+```
+
+## Read numeric environment variable
+Running
+```bash
+myenv="12" yq eval --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: 12
+```
+
+## Read yaml environment variable
+Running
+```bash
+myenv="{b: fish}" yq eval --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: {b: fish}
+```
+
+## Read boolean environment variable as a string
+Running
+```bash
+myenv="true" yq eval --null-input '.a = strenv(myenv)'
+```
+will output
+```yaml
+a: "true"
+```
+
+## Read numeric environment variable as a string
+Running
+```bash
+myenv="12" yq eval --null-input '.a = strenv(myenv)'
+```
+will output
+```yaml
+a: "12"
+```
+
+## Dynamic key lookup with environment variable
+Given a sample.yml file of:
+```yaml
+cat: meow
+dog: woof
+```
+then
+```bash
+myenv="cat" yq eval '.[env(myenv)]' sample.yml
+```
+will output
+```yaml
+meow
+```
+

pkg/yqlib/doc/equals.md

@@ -1,4 +1,4 @@
-# Equals / Not Equals
+# Equals
 
 This is a boolean operator that will return `true` if the LHS is equal to the RHS and `false` otherwise.
 
@@ -12,21 +12,6 @@ It is most often used with the select operator to find particular nodes:
 select(.a == .b)
 ```
 
-The not equals `!=` operator returns `false` if the LHS is equal to the RHS.
-
-## Related Operators
-
-- comparison (`>=`, `<` etc) operators [here](https://mikefarah.gitbook.io/yq/operators/compare)
-- boolean operators (`and`, `or`, `any` etc) [here](https://mikefarah.gitbook.io/yq/operators/boolean-operators)
-- select operator [here](https://mikefarah.gitbook.io/yq/operators/select)
-
-
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified.&#x20;
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Match string
 Given a sample.yml file of:
 ```yaml
@@ -36,7 +21,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | (. == "*at")' sample.yml
+yq eval '.[] | (. == "*at")' sample.yml
 ```
 will output
 ```yaml
@@ -54,7 +39,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | (. != "*at")' sample.yml
+yq eval '.[] | (. != "*at")' sample.yml
 ```
 will output
 ```yaml
@@ -72,7 +57,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | (. == 4)' sample.yml
+yq eval '.[] | (. == 4)' sample.yml
 ```
 will output
 ```yaml
@@ -81,7 +66,7 @@ true
 false
 ```
 
-## Don't match number
+## Dont match number
 Given a sample.yml file of:
 ```yaml
 - 3
@@ -90,7 +75,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | (. != 4)' sample.yml
+yq eval '.[] | (. != 4)' sample.yml
 ```
 will output
 ```yaml
@@ -102,35 +87,35 @@ true
 ## Match nulls
 Running
 ```bash
-yq --null-input 'null == ~'
+yq eval --null-input 'null == ~'
 ```
 will output
 ```yaml
 true
 ```
 
-## Non existent key doesn't equal a value
+## Non exisitant key doesn't equal a value
 Given a sample.yml file of:
 ```yaml
 a: frog
 ```
 then
 ```bash
-yq 'select(.b != "thing")' sample.yml
+yq eval 'select(.b != "thing")' sample.yml
 ```
 will output
 ```yaml
 a: frog
 ```
 
-## Two non existent keys are equal
+## Two non existant keys are equal
 Given a sample.yml file of:
 ```yaml
 a: frog
 ```
 then
 ```bash
-yq 'select(.b == .c)' sample.yml
+yq eval 'select(.b == .c)' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/file-operators.md

@@ -10,12 +10,6 @@ Note the use of eval-all to ensure all documents are loaded into memory.
 yq eval-all 'select(fi == 0) * select(filename == "file2.yaml")' file1.yaml file2.yaml
 ```
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Get filename
 Given a sample.yml file of:
 ```yaml
@@ -23,7 +17,7 @@ a: cat
 ```
 then
 ```bash
-yq 'filename' sample.yml
+yq eval 'filename' sample.yml
 ```
 will output
 ```yaml
@@ -37,7 +31,7 @@ a: cat
 ```
 then
 ```bash
-yq 'file_index' sample.yml
+yq eval 'fileIndex' sample.yml
 ```
 will output
 ```yaml
@@ -55,7 +49,7 @@ a: cat
 ```
 then
 ```bash
-yq eval-all 'file_index' sample.yml another.yml
+yq eval-all 'fileIndex' sample.yml another.yml
 ```
 will output
 ```yaml
@@ -71,7 +65,7 @@ a: cat
 ```
 then
 ```bash
-yq 'fi' sample.yml
+yq eval 'fi' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/flatten.md

@@ -1,12 +1,6 @@
 # Flatten
 This recursively flattens arrays.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Flatten
 Recursively flattens all arrays
 
@@ -18,7 +12,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'flatten' sample.yml
+yq eval 'flatten' sample.yml
 ```
 will output
 ```yaml
@@ -36,7 +30,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'flatten(1)' sample.yml
+yq eval 'flatten(1)' sample.yml
 ```
 will output
 ```yaml
@@ -52,7 +46,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'flatten' sample.yml
+yq eval 'flatten' sample.yml
 ```
 will output
 ```yaml
@@ -67,7 +61,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'flatten' sample.yml
+yq eval 'flatten' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/group-by.md

@@ -2,12 +2,6 @@
 
 This is used to group items in an array by an expression.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Group by field
 Given a sample.yml file of:
 ```yaml
@@ -20,7 +14,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'group_by(.foo)' sample.yml
+yq eval 'group_by(.foo)' sample.yml
 ```
 will output
 ```yaml
@@ -46,7 +40,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq 'group_by(.foo)' sample.yml
+yq eval 'group_by(.foo)' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/has.md

@@ -2,12 +2,6 @@
 
 This is operation that returns true if the key exists in a map (or index in an array), false otherwise.
 
-{% hint style="warning" %}
-Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
-
-`yq e <exp> <file>`
-{% endhint %}
-
 ## Has map key
 Given a sample.yml file of:
 ```yaml
@@ -18,7 +12,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | has("a")' sample.yml
+yq eval '.[] | has("a")' sample.yml
 ```
 will output
 ```yaml
@@ -42,7 +36,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | select(.a.b | has("c"))' sample.yml
+yq eval '.[] | select(.a.b | has("c"))' sample.yml
 ```
 will output
 ```yaml
@@ -63,7 +57,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq '.[] | has(1)' sample.yml
+yq eval '.[] | has(1)' sample.yml
 ```
 will output
 ```yaml

pkg/yqlib/doc/headers/Main.md

@@ -5,7 +5,7 @@
 
 yq [eval/eval-all] [expression] files..
 
-eval/e  - (default) Apply the expression to each document in each yaml file in sequence
+eval/e  - Apply the expression to each document in each yaml file in sequence
 
 eval-all/ea - Loads all yaml documents of all yaml files and runs expression once
 
@@ -18,33 +18,32 @@ This documentation is also available at https://mikefarah.gitbook.io/yq/
 
 ## Read a value:
 ```bash
-yq '.a.b[0].c' file.yaml
+yq e '.a.b[0].c' file.yaml
 ```
 
 ## Pipe from STDIN:
 ```bash
-cat file.yaml | yq '.a.b[0].c'
+cat file.yaml | yq e '.a.b[0].c' -
 ```
 
 ## Update a yaml file, inplace
 ```bash
-yq -i '.a.b[0].c = "cool"' file.yaml
+yq e -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
+NAME=mike yq e -i '.a.b[0].c = strenv(NAME)' file.yaml
 ```
 
 ## Merge multiple files
 ```
 yq ea '. as $item ireduce ({}; . * $item )' path/to/*.yml
 ```
-Note the use of `ea` to evaluate all files at once (instead of in sequence.)
 
 ## Multiple updates to a yaml file
 ```bash
-yq -i '
+yq e -i '
   .a.b[0].c = "cool" |
   .x.y.z = "foobar" |
   .person.name = strenv(NAME)

pkg/yqlib/doc/headers/add.md

@@ -0,0 +1,8 @@
+# Add
+
+Add behaves differently according to the type of the LHS:
+* arrays: concatenate
+* number scalars: arithmetic addition
+* string scalars: concatenate
+
+Use `+=` as append assign for things like increment. Note that `.a += .x` is equivalent to running `.a = .a + .x`.

pkg/yqlib/doc/headers/boolean-operators.md

@@ -9,9 +9,3 @@ The `or` and `and` operators take two parameters and return a boolean result.
 `any_c(condition)` and `all_c(condition)` are like `any` and `all` but they take a condition expression that is used against each element to determine if it's `true`. Note: in `jq` you can simply pass a condition to `any` or `all` and it simply works - `yq` isn't that clever..yet
 
 These are most commonly used with the `select` operator to filter particular nodes.
-
-## Related Operators
-
-- equals / not equals (`==`, `!=`) operators [here](https://mikefarah.gitbook.io/yq/operators/equals)
-- comparison (`>=`, `<` etc) operators [here](https://mikefarah.gitbook.io/yq/operators/compare)
-- select operator [here](https://mikefarah.gitbook.io/yq/operators/select)

pkg/yqlib/doc/headers/encode-decode.md

@@ -0,0 +1,7 @@
+# Encoder / Decoder
+
+Encode operators will take the piped in object structure and encode it as a string in the desired format. The decode operators do the opposite, they take a formatted string and decode it into the relevant object structure.
+
+Note that you can optionally pass an indent value to the encode functions (see below).
+
+These operators are useful to process yaml documents that have stringified embeded yaml/json/props in them.

pkg/yqlib/doc/headers/env-variable-operators.md

@@ -0,0 +1,3 @@
+# Env Variable Operators
+
+This operator is used to handle environment variables usage in path expressions. While environment variables can, of course, be passed in via your CLI with string interpolation, this often comes with complex quote escaping and can be tricky to write and read. Note that there are two forms, `env` which will parse the environment variable as a yaml (be it a map, array, string, number of boolean) and `strenv` which will always parse the argument as a string.

pkg/yqlib/doc/headers/equals.md

@@ -0,0 +1,13 @@
+# Equals
+
+This is a boolean operator that will return `true` if the LHS is equal to the RHS and `false` otherwise.
+
+```
+.a == .b
+```
+
+It is most often used with the select operator to find particular nodes:
+
+```
+select(.a == .b)
+```

pkg/yqlib/doc/headers/load.md

@@ -0,0 +1,13 @@
+# Load
+
+The `load`/`strload` operator allows you to load in content from another file referenced in your yaml document.
+
+Note that you can use string operators like `+` and `sub` to modify the value in the yaml file to a path that exists in your system.
+
+
+Lets say there is a file `../../examples/thing.yml`:
+
+```yaml
+a: apple is included
+b: cool
+```

pkg/yqlib/doc/headers/multiply-merge.md

@@ -0,0 +1,22 @@
+# Multiply (Merge)
+
+Like the multiple operator in jq, depending on the operands, this multiply operator will do different things. Currently numbers, arrays and objects are supported.
+
+## Objects and arrays - merging
+Objects are merged deeply matching on matching keys. By default, array values override and are not deeply merged.
+
+Note that when merging objects, this operator returns the merged object (not the parent). This will be clearer in the examples below.
+
+### Merge Flags
+You can control how objects are merged by using one or more of the following flags. Multiple flags can be used together, e.g. `.a *+? .b`.  See examples below
+
+- `+` to append arrays
+- `?` to only merge existing fields
+- `d` to deeply merge arrays
+
+### Merging files
+Note the use of `eval-all` to ensure all documents are loaded into memory.
+
+```bash
+yq eval-all 'select(fileIndex == 0) * select(fileIndex == 1)' file1.yaml file2.yaml
+```

pkg/yqlib/doc/headers/recursive-descent-glob.md

@@ -8,7 +8,7 @@ This will, like the `jq` equivalent, recursively match all _value_ nodes. Use it
 For instance to set the `style` of all _value_ nodes in a yaml doc, excluding map keys:
 
 ```bash
-yq '.. style= "flow"' file.yaml
+yq eval '.. style= "flow"' file.yaml
 ```
 
 ## match values and map keys form `...`
@@ -17,5 +17,5 @@ The also includes map keys in the results set. This is particularly useful in YA
 For instance to set the `style` of all nodes in a yaml doc, including the map keys:
 
 ```bash
-yq '... style= "flow"' file.yaml
+yq eval '... style= "flow"' file.yaml
 ```