v4.54.3

.dockerignore

@@ -1 +0,0 @@
-bin/*

.github/FUNDING.yml

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

.github/ISSUE_TEMPLATE/bug_report_v3.md

@@ -1,51 +0,0 @@
----
-name: Bug report - V3
-about: Create a report to help us improve
-title: ''
-labels: bug, v3
-assignees: ''
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-Note that any how to questions should be posted in the discussion board and not raised as an issue.
-
-Version of yq: 3.X.X
-Operating system: mac/linux/windows/....
-Installed via: docker/binary release/homebrew/snap/...
-
-**Input Yaml**
-Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
-data1.yml:
-```yaml
-this: should really work
-```
-
-data2.yml:
-```yaml
-but: it strangely didn't
-```
-
-**Command**
-The command you ran:
-```
-yq merge data1.yml data2.yml
-```
-
-**Actual behavior**
-
-```yaml
-cat: meow
-```
-
-**Expected behavior**
-
-```yaml
-this: should really work
-but: it strangely didn't
-```
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/bug_report_v4.md

@@ -1,51 +0,0 @@
----
-name: Bug report - V4
-about: Create a report to help us improve
-title: ''
-labels: bug, v4
-assignees: ''
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-Note that any how to questions should be posted in the discussion board and not raised as an issue.
-
-Version of yq: 4.X.X
-Operating system: mac/linux/windows/....
-Installed via: docker/binary release/homebrew/snap/...
-
-**Input Yaml**
-Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
-data1.yml:
-```yaml
-this: should really work
-```
-
-data2.yml:
-```yaml
-but: it strangely didn't
-```
-
-**Command**
-The command you ran:
-```
-yq eval-all 'select(fileIndex==0) | .a.b.c' data1.yml data2.yml
-```
-
-**Actual behavior**
-
-```yaml
-cat: meow
-```
-
-**Expected behavior**
-
-```yaml
-this: should really work
-but: it strangely didn't
-```
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,42 +0,0 @@
----
-name: Feature request - V4
-about: Suggest an idea for this project
-title: ''
-labels: enhancement, v4
-assignees: ''
-
----
-
-**Please describe your feature request.**
-A clear and concise description of what the request is and what it would solve. 
-Eg. I wish I could use yq to [...]
-
-Note:
-- how to questions should be posted in the discussion board and not raised as an issue.
-- V3 will no longer have any enhancements.
-
-**Describe the solution you'd like**
-If we have data1.yml like:
-(please keep to around 10 lines )
-
-```yaml
-country: Australia
-```
-
-And we run a command:
-
-```bash
-yq eval 'predictWeatherOf(.country)'
-```
-
-it could output
-
-```yaml
-temp: 32
-```
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.

.github/workflows/go.yml

@@ -1,31 +0,0 @@
-name: Build
-on: [push]
-jobs:
-
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-
-    - name: Set up Go 1.15
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.15
-      id: go
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
-
-    - name: Get dependencies
-      run: |
-        go get -v -t -d ./...
-        if [ -f Gopkg.toml ]; then
-            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-            dep ensure
-        fi
-
-    - name: Download deps
-      run: |
-        export PATH=${PATH}:`go env GOPATH`/bin
-        scripts/devtools.sh
-        make local build

.github/workflows/release.yml

@@ -1,70 +0,0 @@
-name: Release YQ
-on:
-  push:
-    tags:
-      - 'v*'
-
-jobs:
-  publishGitRelease:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
-        with:
-          go-version: '^1.15'
-      - name: Cross compile
-        run: |
-          sudo apt-get install rhash -y
-          go get github.com/mitchellh/gox
-          ./scripts/xcompile.sh
-
-      - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1.0.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: ${{ github.ref }}
-          draft: true
-          prerelease: false
-
-      - uses: shogo82148/actions-upload-release-asset@v1
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: build/*
-
-  publishDocker:
-    environment: dockerhub
-    env:
-      IMAGE_NAME: mikefarah/yq
-    runs-on: ubuntu-latest
-    steps:
-      - 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

@@ -1,19 +0,0 @@
-name: Test Yq Action
-on: [push]
-jobs:
-
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Get test
-        uses: mikefarah/yq@master
-        with:
-          cmd: yq eval '.a' examples/data1.yaml
-      - name: Write inplace test
-        id: lookupSdkVersion
-        uses: mikefarah/yq@master
-        with:
-          cmd: yq eval -i '.a.b = 5' examples/data1.yaml

.gitignore

@@ -1,42 +0,0 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
-
-# Folders
-_obj
-_test
-bin
-build
-build-done
-.DS_Store
-
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
-
-_testmain.go
-coverage.out
-coverage.html
-*.exe
-*.test
-*.prof
-yaml
-vendor/
-tmp/
-cover/
-yq
-
-# snapcraft
-parts/
-prime/
-.snapcraft/
-yq*.snap
-test.yml
-test2.yml

CODE_OF_CONDUCT.md

@@ -1,76 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, sex characteristics, gender identity and expression,
-level of experience, education, socio-economic status, nationality, personal
-appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment
-include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or
- advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic
- address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a
- professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
-
-Project maintainers have the right and responsibility to remove, edit, or
-reject comments, commits, code, wiki edits, issues, and other contributions
-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
-threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community. Examples of
-representing a project or community include using an official project e-mail
-address, posting via an official social media account, or acting as an appointed
-representative at an online or offline event. Representation of a project may be
-further defined and clarified by project maintainers.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at mikefarah@gmail.com. All
-complaints will be reviewed and investigated and will result in a response that
-is deemed necessary and appropriate to the circumstances. The project team is
-obligated to maintain confidentiality with regard to the reporter of an incident.
-Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
-
-[homepage]: https://www.contributor-covenant.org
-
-For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq

CONTRIBUTING.md

@@ -1,8 +0,0 @@
-1. Install (golang)[https://golang.org/]
-1. Run  `scripts/devtools.sh` to install the required devtools
-2. Run `make [local] vendor` to install the vendor dependencies
-2. Run `make [local] test` to ensure you can run the existing tests
-3. Write unit tests - (see existing examples). Changes will not be accepted without corresponding unit tests.
-4. Make the code changes.
-5. `make [local] test` to lint code and run tests
-6. Profit! ok no profit, but raise a PR and get kudos :)

Dockerfile

@@ -1,32 +0,0 @@
-FROM golang:1.15 as builder
-
-WORKDIR /go/src/mikefarah/yq
-
-# cache devtools
-COPY ./scripts/devtools.sh /go/src/mikefarah/yq/scripts/devtools.sh
-RUN ./scripts/devtools.sh
-
-COPY . /go/src/mikefarah/yq
-
-RUN CGO_ENABLED=0 make local build
-
-# 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:3.13.5 as production
-
-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
-
-ARG VERSION=none
-LABEL version=${VERSION}
-
-USER yq
-
-WORKDIR /workdir
-
-ENTRYPOINT ["/usr/bin/yq"]

Dockerfile.dev

@@ -1,10 +0,0 @@
-FROM golang:1.15
-
-COPY scripts/devtools.sh /opt/devtools.sh
-
-RUN set -e -x \
-    && /opt/devtools.sh
-ENV PATH=/go/bin:$PATH
-
-ENV CGO_ENABLED 0
-ENV GOPATH /go:/yq

LICENSE

@@ -1,19 +0,0 @@
-Copyright (c) 2017 Mike Farah
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

Makefile

@@ -1,114 +0,0 @@
-MAKEFLAGS += --warn-undefined-variables
-SHELL := /bin/bash
-.SHELLFLAGS := -o pipefail -euc
-.DEFAULT_GOAL := install
-
-include Makefile.variables
-
-.PHONY: help
-help:
-	@echo 'Management commands for cicdtest:'
-	@echo
-	@echo 'Usage:'
-	@echo '  ## Develop / Test Commands'
-	@echo '    make build           Build yq binary.'
-	@echo '    make install         Install yq.'
-	@echo '    make xcompile        Build cross-compiled binaries of yq.'
-	@echo '    make vendor          Install dependencies to vendor directory.'
-	@echo '    make format          Run code formatter.'
-	@echo '    make check           Run static code analysis (lint).'
-	@echo '    make secure          Run gosec.'
-	@echo '    make test            Run tests on project.'
-	@echo '    make cover           Run tests and capture code coverage metrics on project.'
-	@echo '    make clean           Clean the directory tree of produced artifacts.'
-	@echo
-	@echo '  ## Utility Commands'
-	@echo '    make setup           Configures Minishfit/Docker directory mounts.'
-	@echo
-
-
-.PHONY: clean
-clean:
-	@rm -rf bin build cover *.out
-
-## prefix before other make targets to run in your local dev environment
-local: | quiet
-	@$(eval DOCKRUN= )
-	@mkdir -p tmp
-	@touch tmp/dev_image_id
-quiet: # this is silly but shuts up 'Nothing to be done for `local`'
-	@:
-
-prepare: tmp/dev_image_id
-tmp/dev_image_id: Dockerfile.dev scripts/devtools.sh
-	@mkdir -p tmp
-	@docker rmi -f ${DEV_IMAGE} > /dev/null 2>&1 || true
-	@docker build -t ${DEV_IMAGE} -f Dockerfile.dev .
-	@docker inspect -f "{{ .ID }}" ${DEV_IMAGE} > tmp/dev_image_id
-
-# ----------------------------------------------
-# build
-.PHONY: build
-build: build/dev
-
-.PHONY: build/dev
-build/dev: test *.go
-	@mkdir -p bin/
-	${DOCKRUN} go build --ldflags "$(LDFLAGS)"
-	${DOCKRUN} bash ./scripts/acceptance.sh
-
-## Compile the project for multiple OS and Architectures.
-xcompile: check
-	@rm -rf build/
-	@mkdir -p build
-	${DOCKRUN} bash ./scripts/xcompile.sh
-	@find build -type d -exec chmod 755 {} \; || :
-	@find build -type f -exec chmod 755 {} \; || :
-
-.PHONY: install
-install: build
-	${DOCKRUN} go install
-
-# Each of the fetch should be an entry within vendor.json; not currently included within project
-.PHONY: vendor
-vendor: tmp/dev_image_id
-	${DOCKRUN} go mod vendor
-
-# ----------------------------------------------
-# develop and test
-
-.PHONY: format
-format: vendor
-	${DOCKRUN} bash ./scripts/format.sh
-
-.PHONY: check
-check: format
-	${DOCKRUN} bash ./scripts/check.sh
-
-.PHONY: secure
-secure: 
-	${DOCKRUN} bash ./scripts/secure.sh
-
-.PHONY: test
-test: check
-	${DOCKRUN} bash ./scripts/test.sh
-
-.PHONY: cover
-cover: check
-	@rm -rf cover/
-	@mkdir -p cover
-	${DOCKRUN} bash ./scripts/coverage.sh
-	@find cover -type d -exec chmod 755 {} \; || :
-	@find cover -type f -exec chmod 644 {} \; || :
-
-
-.PHONY: release
-release: xcompile
-	${DOCKRUN} bash ./scripts/publish.sh
-
-# ----------------------------------------------
-# utilities
-
-.PHONY: setup
-setup:
-	@bash ./scripts/setup.sh

Makefile.variables

@@ -1,38 +0,0 @@
-export PROJECT = yq
-IMPORT_PATH := github.com/mikefarah/${PROJECT}
-
-export GIT_COMMIT = $(shell git rev-parse --short HEAD)
-export GIT_DIRTY = $(shell test -n "$$(git status --porcelain)" && echo "+CHANGES" || true)
-export GIT_DESCRIBE = $(shell git describe --tags --always)
-LDFLAGS :=
-LDFLAGS += -X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY}
-LDFLAGS += -X main.GitDescribe=${GIT_DESCRIBE}
-
-GITHUB_TOKEN ?=
-
-# Windows environment?
-CYG_CHECK := $(shell hash cygpath 2>/dev/null && echo 1)
-ifeq ($(CYG_CHECK),1)
-	VBOX_CHECK := $(shell hash VBoxManage 2>/dev/null && echo 1)
-
-	# Docker Toolbox (pre-Windows 10)
-	ifeq ($(VBOX_CHECK),1)
-		ROOT := /${PROJECT}
-	else
-		# Docker Windows
-		ROOT := $(shell cygpath -m -a "$(shell pwd)")
-	endif
-else
-	# all non-windows environments
-	ROOT := $(shell pwd)
-endif
-
-DEV_IMAGE := ${PROJECT}_dev
-
-DOCKRUN := docker run --rm \
-	-e LDFLAGS="${LDFLAGS}" \
-	-e GITHUB_TOKEN="${GITHUB_TOKEN}" \
-	-v ${ROOT}/vendor:/go/src \
-	-v ${ROOT}:/${PROJECT}/src/${IMPORT_PATH} \
-	-w /${PROJECT}/src/${IMPORT_PATH} \
-	${DEV_IMAGE}

README.md

@@ -1,237 +1,71 @@
 # 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)
+a lightweight and portable command-line YAML, JSON, INI and XML processor. `yq` uses [jq](https://github.com/stedolan/jq) like syntax but works with yaml files as well as json, xml, ini, properties, csv and tsv. It doesn't yet support everything `jq` does - but it does support the most common operations and functions, and more is being added continuously.
 
+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.
 
-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.
+## Quick Usage Guide
 
-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.
+Read a value:
+```bash
+yq '.a.b[0].c' file.yaml
+```
 
-## V4 released!
-V4 is now officially released, it's quite different from V3 (sorry for the migration), however it is much more similar to ```jq```, using a similar expression syntax and therefore support much more complex functionality! 
+Pipe from STDIN:
+```bash
+yq '.a.b[0].c' < file.yaml
+```
 
-If you've been using v3 and want/need to upgrade, checkout the [upgrade guide](https://mikefarah.gitbook.io/yq/v/v4.x/upgrading-from-v3).
+Update a yaml file, in place
+```bash
+yq -i '.a.b[0].c = "cool"' file.yaml
+```
 
-Support for v3 will cease August 2021, until then, critical bug and security fixes will still get applied if required.
+Update using environment variables
+```bash
+NAME=mike yq -i '.a.b[0].c = strenv(NAME)' file.yaml
+```
+
+Merge multiple files
+```bash
+# merge two files
+yq -n 'load("file1.yaml") * load("file2.yaml")'
+
+# merge using globs:
+# 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 '
+  .a.b[0].c = "cool" |
+  .x.y.z = "foobar" |
+  .person.name = strenv(NAME)
+' file.yaml
+```
+
+Find and update an item in an array:
+```bash
+yq '(.[] | select(.name == "foo") | .address) = "12 cat st"'
+```
+
+Convert JSON to YAML
+```bash
+yq -Poy sample.json
+```
+
+See [recipes](https://mikefarah.gitbook.io/yq/recipes) for more examples and the [documentation](https://mikefarah.gitbook.io/yq/) for more information.
+
+Take a look at the discussions for [common questions](https://github.com/mikefarah/yq/discussions/categories/q-a), and [cool ideas](https://github.com/mikefarah/yq/discussions/categories/show-and-tell)
 
 ## Install
 
-### [Download the latest binary](https://github.com/mikefarah/yq/releases/latest)
-
-### wget
-Use wget to download the pre-compiled binaries:
-
-#### Compressed via tar.gz
-```bash
-wget https://github.com/mikefarah/yq/releases/download/${VERSION}/${BINARY}.tar.gz -O - |\
-  tar xz && mv ${BINARY} /usr/bin/yq
-```
-
-#### Plain binary
-
-```bash
-wget https://github.com/mikefarah/yq/releases/download/${VERSION}/${BINARY} -O /usr/bin/yq &&\
-    chmod +x /usr/bin/yq
-```
-
-For instance, VERSION=v4.2.0 and BINARY=yq_linux_amd64
-
-### MacOS / Linux via Homebrew:
-Using [Homebrew](https://brew.sh/)
-```
-brew install yq
-```
-
-or, for the (deprecated) v3 version:
-
-```
-brew install yq@3
-```
-
-Note that for v3, as it is a versioned brew it will not add the `yq` command to your path automatically. Please follow the instructions given by brew upon installation.
-
-### Linux via snap:
-```
-snap install yq
-```
-
-or, for the (deprecated) v3 version:
-
-```
-snap install yq --channel=v3/stable
-```
-
-#### Snap notes
-`yq` installs with [_strict confinement_](https://docs.snapcraft.io/snap-confinement/6233) in snap, this means it doesn't have direct access to root files. To read root files you can:
-
-```
-sudo cat /etc/myfile | yq e '.a.path' - 
-```
-
-And to write to a root file you can either use [sponge](https://linux.die.net/man/1/sponge):
-```
-sudo cat /etc/myfile | yq e '.a.path = "value"' - | sudo sponge /etc/myfile
-```
-or write to a temporary file:
-```
-sudo cat /etc/myfile | yq e '.a.path = "value"' | sudo tee /etc/myfile.tmp
-sudo mv /etc/myfile.tmp /etc/myfile
-rm /etc/myfile.tmp
-```
-
-### Run with Docker
-
-#### Oneshot use:
-
-```bash
-docker run --rm -v "${PWD}":/workdir mikefarah/yq <command> [flags] [expression ]FILE...
-```
-
-#### Run commands interactively:
-
-```bash
-docker run --rm -it -v "${PWD}":/workdir --entrypoint sh mikefarah/yq
-```
-
-It can be useful to have a bash function to avoid typing the whole docker command:
-
-```bash
-yq() {
-  docker run --rm -i -v "${PWD}":/workdir mikefarah/yq "$@"
-}
-```
-
-#### Running as root:
-
-`yq`'s docker image no longer runs under root (https://github.com/mikefarah/yq/pull/860). If you'd like to install more things in the docker image, or you're having permissions issues when attempting to read/write files you'll need to either:
-
-
-```
-docker run --user="root" -it --entrypoint sh mikefarah/yq
-```
-
-Or, in your docker file:
-
-```
-FROM mikefarah/yq
-
-USER root
-RUN apk add bash
-USER yq
-```
-
-### Go Get:
-```
-GO111MODULE=on go get github.com/mikefarah/yq/v4
-```
-
-## Community Supported Installation methods
-As these are supported by the community :heart: - however, they may be out of date with the officially supported releases.
-
-# Webi
-
-```
-webi yq
-```
-
-See [webi](https://webinstall.dev/)
-Supported by @adithyasunil26 (https://github.com/webinstall/webi-installers/tree/master/yq)
-
-### Windows:
-[![Chocolatey](https://img.shields.io/chocolatey/v/yq.svg)](https://chocolatey.org/packages/yq)
-[![Chocolatey](https://img.shields.io/chocolatey/dt/yq.svg)](https://chocolatey.org/packages/yq)
-```
-choco install yq
-```
-Supported by @chillum (https://chocolatey.org/packages/yq)
-
-### Mac:
-Using [MacPorts](https://www.macports.org/)
-```
-sudo port selfupdate
-sudo port install yq
-```
-Supported by @herbygillot (https://ports.macports.org/maintainer/github/herbygillot)
-
-### Alpine Linux
-- Enable edge/community repo by adding ```$MIRROR/alpine/edge/community``` to ```/etc/apk/repositories```
-- Update database index with ```apk update```
-- Install yq with ```apk add yq```
-
-Supported by Tuan Hoang
-https://pkgs.alpinelinux.org/package/edge/community/x86/yq
-
-
-### On Ubuntu 16.04 or higher from Debian package:
-```sh
-sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CC86BB64
-sudo add-apt-repository ppa:rmescandon/yq
-sudo apt update
-sudo apt install yq -y
-```
-Supported by @rmescandon (https://launchpad.net/~rmescandon/+archive/ubuntu/yq)
-
-## Features
-- [Detailed documentation with many examples](https://mikefarah.gitbook.io/yq/)
-- Written in portable go, so you can download a lovely dependency free binary
-- Uses similar syntax as `jq` but works with YAML and JSON files
-- Fully supports multi document yaml files
-- Supports yaml [front matter](https://mikefarah.gitbook.io/yq/usage/front-matter) blocks (e.g. jekyll/assemble)
-- Colorized yaml output
-- [Deeply traverse yaml](https://mikefarah.gitbook.io/yq/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 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)
-- [Convert to/from json to yaml](https://mikefarah.gitbook.io/yq/v/v4.x/usage/convert)
-- [Pipe data in by using '-'](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate)
-- [General shell completion scripts (bash/zsh/fish/powershell)](https://mikefarah.gitbook.io/yq/v/v4.x/commands/shell-completion)
-- [Reduce](https://mikefarah.gitbook.io/yq/operators/reduce) to merge multiple files or sum an array or other fancy things.
-- [Github Action](https://mikefarah.gitbook.io/yq/usage/github-action) to use in your automated pipeline (thanks @devorbitus)
-
-## [Usage](https://mikefarah.gitbook.io/yq/)
-
-Check out the [documentation](https://mikefarah.gitbook.io/yq/) for more detailed and advanced usage.
-
-```
-Usage:
-  yq [flags]
-  yq [command]
-
-Available Commands:
-  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
-  -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.
-  -P, --prettyPrint           pretty print, shorthand for '... style = ""'
-  -j, --tojson                output as json. Set indent to 0 to print json in one line.
-      --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.
-```
-
-Simple Example:
-
-```bash
-yq e '.a.b | length' f1.yml f2.yml 
-```
+See the [github page](https://github.com/mikefarah/yq/#install) for the various ways you can install and use `yq`
 
 ## Known Issues / Missing Features
 - `yq` attempts to preserve comment positions and whitespace as much as possible, but it does not handle all scenarios (see https://github.com/go-yaml/yaml/tree/v3 for details)
-- Powershell has its own...opinions: https://mikefarah.gitbook.io/yq/usage/tips-and-tricks#quotes-in-windows-powershell
+- 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.

SUMMARY.md

@@ -0,0 +1,101 @@
+# Table of contents
+
+* [yq](README.md)
+* [How It Works](how-it-works.md)
+* [Recipes](usage/recipes.md)
+* [Upgrading from V3](upgrading-from-v3.md)
+
+## Commands
+
+* [Evaluate](commands/evaluate.md)
+* [Evaluate All](commands/evaluate-all.md)
+* [Shell Completion](commands/shell-completion.md)
+
+***
+
+* [Operators](operators/README.md)
+  * [Add](operators/add.md)
+  * [Alternative (Default value)](operators/alternative-default-value.md)
+  * [Anchor and Alias Operators](operators/anchor-and-alias-operators.md)
+  * [Array to Map](operators/array-to-map.md)
+  * [Assign (Update)](operators/assign-update.md)
+  * [Boolean Operators](operators/boolean-operators.md)
+  * [Collect into Array](operators/collect-into-array.md)
+  * [Column](operators/column.md)
+  * [Comment Operators](operators/comment-operators.md)
+  * [Compare Operators](operators/compare.md)
+  * [Contains](operators/contains.md)
+  * [Create, Collect into Object](operators/create-collect-into-object.md)
+  * [Date Time](operators/datetime.md)
+  * [Delete](operators/delete.md)
+  * [Divide](operators/divide.md)
+  * [Document Index](operators/document-index.md)
+  * [Encode / Decode](operators/encode-decode.md)
+  * [Entries](operators/entries.md)
+  * [Env Variable Operators](operators/env-variable-operators.md)
+  * [Equals](operators/equals.md)
+  * [Eval](operators/eval.md)
+  * [File Operators](operators/file-operators.md)
+  * [Filter Operator](operators/filter.md)
+  * [First Operator](operators/first.md)
+  * [Flatten](operators/flatten.md)
+  * [Group By](operators/group-by.md)
+  * [Has](operators/has.md)
+  * [Keys](operators/keys.md)
+  * [Kind](operators/kind.md)
+  * [Length](operators/length.md)
+  * [Line](operators/line.md)
+  * [Load](operators/load.md)
+  * [Min](operators/min.md)
+  * [Map](operators/map.md)
+  * [Max](operators/max.md)
+  * [Modulo](operators/modulo.md)
+  * [Multiply (Merge)](operators/multiply-merge.md)
+  * [Omit](operators/omit.md)
+  * [Parent](operators/parent.md)
+  * [Path](operators/path.md)
+  * [Pick](operators/pick.md)
+  * [Pipe](operators/pipe.md)
+  * [Pivot](operators/pivot.md)
+  * [Recursive Descent (Glob)](operators/recursive-descent-glob.md)
+  * [Reduce](operators/reduce.md)
+  * [Reverse](operators/reverse.md)
+  * [Select](operators/select.md)
+  * [Shuffle](operators/shuffle.md)
+  * [Slice Array](operators/slice-array.md)
+  * [Sort](operators/sort.md)
+  * [Sort Keys](operators/sort-keys.md)
+  * [Split into Documents](operators/split-into-documents.md)
+  * [String Operators](operators/string-operators.md)
+  * [Style](operators/style.md)
+  * [Subtract](operators/subtract.md)
+  * [System](operators/system-operators.md)
+  * [Tag](operators/tag.md)
+  * [To Number](operators/to_number.md)
+  * [Traverse (Read)](operators/traverse-read.md)
+  * [Union](operators/union.md)
+  * [Unique](operators/unique.md)
+  * [Variable Operators](operators/variable-operators.md)
+  * [With](operators/with.md)
+
+## Usage
+
+* [Output format](usage/output-format.md)
+* [Working with Base64](usage/base64.md)
+* [Working with CSV, TSV](usage/csv-tsv.md)
+* [Working with JSON](usage/convert.md)
+* [Working with Properties](usage/properties.md)
+* [Working with XML](usage/xml.md)
+* [Working with HCL](usage/hcl.md)
+* [Working with LUA](usage/lua.md)
+* [Working with TOML](usage/toml.md)
+* [Working with KYAML](usage/kyaml.md)
+* [Working with Shell Output](usage/shellvariables.md)
+* [Front Matter](usage/front-matter.md)
+* [Split into multiple files](usage/split-into-multiple-files.md)
+* [GitHub Action](usage/github-action.md)
+* [Tips, Tricks, Troubleshooting](usage/tips-and-tricks.md)
+
+***
+
+* [Github Page](https://github.com/mikefarah/yq)

acceptance_tests/basic.sh

@@ -1,72 +0,0 @@
-#!/bin/bash
-
-setUp() {
-  rm -f test.yml
-}
-
-testBasicEvalRoundTrip() {
-  ./yq e -n ".a = 123" > test.yml
-  X=$(./yq e '.a' test.yml)
-  assertEquals 123 "$X"
-}
-
-testBasicUpdateInPlaceSequence() {
-  cat >test.yml <<EOL
-a: 0
-EOL
-  ./yq e -i ".a = 10" test.yml
-  X=$(./yq e '.a' test.yml)
-  assertEquals "10" "$X"
-}
-
-testBasicUpdateInPlaceSequenceEvalAll() {
-  cat >test.yml <<EOL
-a: 0
-EOL
-  ./yq ea -i ".a = 10" test.yml
-  X=$(./yq e '.a' test.yml)
-  assertEquals "10" "$X"
-}
-
-testBasicNoExitStatus() {
-  echo "a: cat" > test.yml
-  X=$(./yq e '.z' test.yml)
-  assertEquals "null" "$X"
-}
-
-testBasicExitStatus() {
-  echo "a: cat" > test.yml
-  X=$(./yq e -e '.z' test.yml 2&>/dev/null)
-  assertEquals 1 "$?"
-}
-
-testBasicExtractFieldWithSeperator() {
-    cat >test.yml <<EOL
----
-name: chart-name
-version: 1.2.3
-EOL
-  X=$(./yq e '.name' test.yml)
-  assertEquals "chart-name" "$X"
-}
-
-testBasicExtractMultipleFieldWithSeperator() {
-    cat >test.yml <<EOL
----
-name: chart-name
-version: 1.2.3
----
-name: thing
-version: 1.2.3
-EOL
-
-read -r -d '' expected << EOM
-chart-name
----
-thing
-EOM
-  X=$(./yq e '.name' test.yml)
-  assertEquals "$expected" "$X"
-}
-
-source ./scripts/shunit2

acceptance_tests/empty.sh

@@ -1,82 +0,0 @@
-#!/bin/bash
-
-setUp() {
-  cat >test.yml <<EOL
-# comment
-EOL
-}
-
-testEmptyEval() {
-  X=$(./yq e test.yml)
-  expected=$(cat test.yml)
-  assertEquals 0 $?
-  assertEquals "$expected" "$X"
-}
-
-testEmptyEvalNoNewLine() {
-  echo -n "#comment" >test.yml
-  X=$(./yq e test.yml)
-  expected=$(cat test.yml)
-  assertEquals 0 $?
-  assertEquals "$expected" "$X"
-}
-
-testEmptyEvalNoNewLineWithExpression() {
-  echo -n "# comment" >test.yml
-  X=$(./yq e '.apple = "tree"' test.yml)
-  read -r -d '' expected << EOM
-# comment
-apple: tree
-EOM
-  assertEquals "$expected" "$X"
-}
-
-testEmptyEvalPipe() {
-  X=$(./yq e - < test.yml)
-  assertEquals 0 $?
-}
-
-testEmptyCommentsWithExpressionEval() {
-  read -r -d '' expected << EOM
-# comment
-apple: tree
-EOM
-
-  X=$(./yq e '.apple="tree"' test.yml)
-
-  assertEquals "$expected" "$X"
-}
-
-testEmptyCommentsWithExpressionEvalAll() {
-  read -r -d '' expected << EOM
-# comment
-apple: tree
-EOM
-
-  X=$(./yq ea '.apple="tree"' test.yml)
-
-  assertEquals "$expected" "$X"
-}
-
-testEmptyWithExpressionEval() {
-  rm test.yml
-  touch test.yml
-  expected="apple: tree"
-
-  X=$(./yq e '.apple="tree"' test.yml)
-
-  assertEquals "$expected" "$X"
-}
-
-testEmptyWithExpressionEvalAll() {
-  rm test.yml
-  touch test.yml
-  expected="apple: tree"
-
-  X=$(./yq ea '.apple="tree"' test.yml)
-
-  assertEquals "$expected" "$X"
-}
-
-
-source ./scripts/shunit2

acceptance_tests/front-matter.sh

@@ -1,75 +0,0 @@
-#!/bin/bash
-
-setUp() {
-  cat >test.yml <<EOL
----
-a: apple
-b: cat
----
-not yaml
-c: at
-EOL
-}
-
-testFrontMatterProcessEval() {
-  read -r -d '' expected << EOM
----
-a: apple
-b: dog
----
-not yaml
-c: at
-EOM
-  ./yq e --front-matter="process" '.b = "dog"' test.yml -i
-  assertEquals "$expected" "$(cat test.yml)"
-}
-
-testFrontMatterProcessEvalAll() {
-  read -r -d '' expected << EOM
----
-a: apple
-b: dog
----
-not yaml
-c: at
-EOM
-  ./yq ea --front-matter="process" '.b = "dog"' test.yml -i
-  assertEquals "$expected" "$(cat test.yml)"
-}
-
-testFrontMatterExtractEval() {
-    cat >test.yml <<EOL
-a: apple
-b: cat
----
-not yaml
-c: at
-EOL
-
-  read -r -d '' expected << EOM
-a: apple
-b: dog
-EOM
-  ./yq e --front-matter="extract" '.b = "dog"' test.yml -i
-  assertEquals "$expected" "$(cat test.yml)"
-}
-
-testFrontMatterExtractEvalAll() {
-  cat >test.yml <<EOL
-a: apple
-b: cat
----
-not yaml
-c: at
-EOL
-
-  read -r -d '' expected << EOM
-a: apple
-b: dog
-EOM
-  ./yq ea --front-matter="extract" '.b = "dog"' test.yml -i
-  assertEquals "$expected" "$(cat test.yml)"
-}
-
-
-source ./scripts/shunit2

acceptance_tests/leading-seperator.sh

@@ -1,420 +0,0 @@
-#!/bin/bash
-
-setUp() {
-  cat >test.yml <<EOL
----
-a: test
-EOL
-}
-
-testLeadingSeperatorWithDoc() {
-  cat >test.yml <<EOL
-# hi peeps
-# cool
----
-a: test
----
-b: cool
-EOL
-
-  read -r -d '' expected << EOM
-# hi peeps
-# cool
----
-a: thing
----
-b: cool
-EOM
-
-  X=$(./yq e '(select(di == 0) | .a) = "thing"' - < test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorPipeIntoEvalSeq() {
-  X=$(./yq e - < test.yml)
-  expected=$(cat test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorExtractField() {
-  X=$(./yq e '.a' - < test.yml)
-  assertEquals "test" "$X"
-}
-
-testLeadingSeperatorExtractFieldWithCommentsAfterSep() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
-EOL
-  X=$(./yq e '.a' test.yml)
-  assertEquals "test" "$X"
-}
-
-testLeadingSeperatorExtractFieldWithCommentsBeforeSep() {
-  cat >test.yml <<EOL
-# hi peeps
-# cool
----
-a: test
-EOL
-  X=$(./yq e '.a' test.yml)
-  assertEquals "test" "$X"
-}
-
-
-testLeadingSeperatorExtractFieldMultiDoc() {
-  cat >test.yml <<EOL
----
-a: test
----
-a: test2
-EOL
-
-  read -r -d '' expected << EOM
-test
----
-test2
-EOM
-  X=$(./yq e '.a' test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorExtractFieldMultiDocWithComments() {
-  cat >test.yml <<EOL
-# here
----
-# there
-a: test
-# whereever
----
-# you are
-a: test2
-# woop
-EOL
-
-  read -r -d '' expected << EOM
-test
----
-test2
-EOM
-  X=$(./yq e '.a' test.yml)
-  assertEquals "$expected" "$X"
-}
-
-
-testLeadingSeperatorEvalSeq() {
-  X=$(./yq e test.yml)
-  expected=$(cat test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorPipeIntoEvalAll() {
-  X=$(./yq ea - < test.yml)
-  expected=$(cat test.yml)
-  assertEquals "$expected" "$X"
-}
-
-
-testLeadingSeperatorEvalAll() {
-  X=$(./yq ea test.yml)
-  expected=$(cat test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalSimple() {
-  read -r -d '' expected << EOM
----
-a: test
----
-version: 3
-application: MyApp
-EOM
-
-
-  X=$(./yq e '.' test.yml examples/order.yaml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocInOneFile() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
----
-b: things
-EOL
-  expected=$(cat test.yml)
-  X=$(./yq e '.' test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocInOneFileEvalAll() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
----
-b: things
-EOL
-  expected=$(cat test.yml)
-  X=$(./yq ea '.' test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalComments() {
-  cat >test.yml <<EOL
-# hi peeps
-# cool
-a: test
-EOL
-
-cat >test2.yml <<EOL
-# this is another doc
-# great
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
-# hi peeps
-# cool
-a: test
----
-# this is another doc
-# great
-b: sane
-EOM
-
-
-  X=$(./yq e '.' test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalCommentsTrailingSep() {
-  cat >test.yml <<EOL
-# hi peeps
-# cool
----
-a: test
-EOL
-
-cat >test2.yml <<EOL
-# this is another doc
-# great
----
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
-# hi peeps
-# cool
----
-a: test
----
-# this is another doc
-# great
----
-b: sane
-EOM
-
-
-  X=$(./yq e '.' test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiMultiDocEvalCommentsTrailingSep() {
-  cat >test.yml <<EOL
-# hi peeps
-# cool
----
-a: test
----
-a1: test2
-EOL
-
-cat >test2.yml <<EOL
-# this is another doc
-# great
----
-b: sane
----
-b2: cool
-EOL
-
-  read -r -d '' expected << EOM
-# hi peeps
-# cool
----
-a: test
----
-a1: test2
----
-# this is another doc
-# great
----
-b: sane
----
-b2: cool
-EOM
-
-
-  X=$(./yq e '.' test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalCommentsLeadingSep() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
-EOL
-
-cat >test2.yml <<EOL
----
-# this is another doc
-# great
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
----
-# hi peeps
-# cool
-a: test
----
-# this is another doc
-# great
-b: sane
-EOM
-
-
-  X=$(./yq e '.' test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalCommentsStripComments() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
----
-# this is another doc
-# great
-b: sane
-EOL
-
-  # it will be hard to remove that top level separator
-  read -r -d '' expected << EOM
-a: test
----
-b: sane
-EOM
-
-  X=$(./yq e '... comments=""'  test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalCommentsLeadingSepNoDocFlag() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
----
-# this is another doc
-# great
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
-# hi peeps
-# cool
-a: test
-# this is another doc
-# great
-b: sane
-EOM
-
-
-  X=$(./yq e '.' --no-doc test.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalJsonFlag() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
-EOL
-
-cat >test2.yml <<EOL
----
-# this is another doc
-# great
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
-{
-  "a": "test"
-}
-{
-  "b": "sane"
-}
-EOM
-
-
-  X=$(./yq e '.' -j test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalAllJsonFlag() {
-  cat >test.yml <<EOL
----
-# hi peeps
-# cool
-a: test
-EOL
-
-cat >test2.yml <<EOL
----
-# this is another doc
-# great
-b: sane
-EOL
-
-  read -r -d '' expected << EOM
-{
-  "a": "test"
-}
-{
-  "b": "sane"
-}
-EOM
-
-
-  X=$(./yq ea '.' -j test.yml test2.yml)
-  assertEquals "$expected" "$X"
-}
-
-testLeadingSeperatorMultiDocEvalAll() {
-  read -r -d '' expected << EOM
----
-a: test
----
-version: 3
-application: MyApp
-EOM
-
-
-  X=$(./yq ea '.' test.yml examples/order.yaml)
-  assertEquals "$expected" "$X"
-}
-
-source ./scripts/shunit2

action.yml

@@ -1,17 +0,0 @@
-name: 'yq - portable yaml processor'
-description: 'create, read, update, delete, merge, validate and do more with yaml'
-branding:
-  icon: command
-  color: gray-dark
-inputs:
-  cmd:
-    description: 'The Command which should be run'
-    required: true
-outputs:
-  result:
-    description: "The complete result from the yq command being run"
-runs:
-  using: 'docker'
-  image: 'github-action/Dockerfile'
-  args:
-    - ${{ inputs.cmd }}

cmd/commands_test.go

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

cmd/constant.go

@@ -1,23 +0,0 @@
-package cmd
-
-var leadingContentPreProcessing = true
-var unwrapScalar = true
-
-var writeInplace = false
-var outputToJSON = false
-
-var exitStatus = false
-var forceColor = false
-var forceNoColor = false
-var colorsEnabled = false
-var indent = 2
-var noDocSeparators = false
-var nullInput = false
-var verbose = false
-var version = false
-var prettyPrint = false
-
-// can be either "" (off), "extract" or "process"
-var frontMatter = ""
-
-var completedSuccessfully = false

cmd/evaluate_all_command.go

@@ -1,134 +0,0 @@
-package cmd
-
-import (
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/mikefarah/yq/v4/pkg/yqlib"
-	"github.com/spf13/cobra"
-)
-
-func createEvaluateAllCommand() *cobra.Command {
-	var cmdEvalAll = &cobra.Command{
-		Use:     "eval-all [expression] [yaml_file1]...",
-		Aliases: []string{"ea"},
-		Short:   "Loads _all_ yaml documents of _all_ yaml files and runs expression once",
-		Example: `
-# Merge f2.yml into f1.yml (inplace)
-yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml f2.yml
-## the same command and expression using shortened names:
-yq ea -i 'select(fi == 0) * select(fi == 1)' f1.yml f2.yml
-
-
-# Merge all given files
-yq ea '. as $item ireduce ({}; . * $item )' file1.yml file2.yml ...
-
-# Read from STDIN
-## use '-' as a filename to read from STDIN
-cat file2.yml | yq ea '.a.b' file1.yml - file3.yml
-`,
-		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.
-
-## Evaluate All ##
-This command loads _all_ yaml documents of _all_ yaml files and runs expression once
-Useful when you need to run an expression across several yaml documents or files (like merge).
-Note that it consumes more memory than eval.
-`,
-		RunE: evaluateAll,
-	}
-	return cmdEvalAll
-}
-func evaluateAll(cmd *cobra.Command, args []string) error {
-	cmd.SilenceUsage = true
-	// 0 args, read std in
-	// 1 arg, null input, process expression
-	// 1 arg, read file in sequence
-	// 2+ args, [0] = expression, file the rest
-
-	var err error
-	stat, _ := os.Stdin.Stat()
-	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
-
-	out := cmd.OutOrStdout()
-
-	fileInfo, _ := os.Stdout.Stat()
-
-	if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
-		colorsEnabled = true
-	}
-
-	firstFileIndex := -1
-	if !nullInput && len(args) == 1 {
-		firstFileIndex = 0
-	} else if len(args) > 1 {
-		firstFileIndex = 1
-	}
-
-	if writeInplace && (firstFileIndex == -1) {
-		return fmt.Errorf("Write inplace flag only applicable when giving an expression and at least one file")
-	}
-
-	if writeInplace {
-		// only use colors if its forced
-		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[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() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
-	}
-
-	if nullInput && len(args) > 1 {
-		return errors.New("Cannot pass files in when using null-input flag")
-	}
-
-	printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
-
-	if frontMatter != "" {
-		frontMatterHandler := yqlib.NewFrontMatterHandler(args[firstFileIndex])
-		err = frontMatterHandler.Split()
-		if err != nil {
-			return err
-		}
-		args[firstFileIndex] = frontMatterHandler.GetYamlFrontMatterFilename()
-
-		if frontMatter == "process" {
-			reader := frontMatterHandler.GetContentReader()
-			printer.SetAppendix(reader)
-			defer yqlib.SafelyCloseReader(reader)
-		}
-		defer frontMatterHandler.CleanUp()
-	}
-
-	allAtOnceEvaluator := yqlib.NewAllAtOnceEvaluator()
-	switch len(args) {
-	case 0:
-		if pipingStdIn {
-			err = allAtOnceEvaluator.EvaluateFiles(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(args[0]), args[1:], printer, leadingContentPreProcessing)
-	}
-
-	completedSuccessfully = err == nil
-
-	if err == nil && exitStatus && !printer.PrintedAnything() {
-		return errors.New("no matches found")
-	}
-
-	return err
-}

cmd/evalute_sequence_command.go

@@ -1,146 +0,0 @@
-package cmd
-
-import (
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/mikefarah/yq/v4/pkg/yqlib"
-	"github.com/spf13/cobra"
-)
-
-func createEvaluateSequenceCommand() *cobra.Command {
-	var cmdEvalSequence = &cobra.Command{
-		Use:     "eval [expression] [yaml_file1]...",
-		Aliases: []string{"e"},
-		Short:   "Apply 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 
-
-# Prints out the file
-yq e sample.yaml 
-
-# Read from STDIN
-## use '-' as a filename to read from STDIN
-cat file2.yml | yq e '.a.b' file1.yml - file3.yml
-
-# Creates a new yaml document
-## Note that editing an empty file does not work.
-yq e -n '.a.b.c = "cat"' 
-
-# Update a file inplace
-yq e '.a.b = "cool"' -i file.yaml 
-`,
-		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.
-
-## Evaluate Sequence ##
-This command iterates over each yaml document from each given file, applies the 
-expression and prints the result in sequence.`,
-		RunE: evaluateSequence,
-	}
-	return cmdEvalSequence
-}
-
-func processExpression(expression string) string {
-	if prettyPrint && expression == "" {
-		return `... style=""`
-	} else if prettyPrint {
-		return fmt.Sprintf("%v | ... style= \"\"", expression)
-	}
-	return expression
-}
-
-func evaluateSequence(cmd *cobra.Command, args []string) error {
-	cmd.SilenceUsage = true
-	// 0 args, read std in
-	// 1 arg, null input, process expression
-	// 1 arg, read file in sequence
-	// 2+ args, [0] = expression, file the rest
-
-	var err error
-	stat, _ := os.Stdin.Stat()
-	pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
-
-	out := cmd.OutOrStdout()
-
-	fileInfo, _ := os.Stdout.Stat()
-
-	if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
-		colorsEnabled = true
-	}
-
-	firstFileIndex := -1
-	if !nullInput && len(args) == 1 {
-		firstFileIndex = 0
-	} else if len(args) > 1 {
-		firstFileIndex = 1
-	}
-
-	if writeInplace && (firstFileIndex == -1) {
-		return fmt.Errorf("Write inplace flag only applicable when giving an expression and at least one file")
-	}
-
-	if writeInplace {
-		// only use colors if its forced
-		colorsEnabled = forceColor
-		writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[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() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
-	}
-
-	printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
-
-	streamEvaluator := yqlib.NewStreamEvaluator()
-
-	if nullInput && len(args) > 1 {
-		return errors.New("Cannot pass files in when using null-input flag")
-	}
-
-	if frontMatter != "" {
-		frontMatterHandler := yqlib.NewFrontMatterHandler(args[firstFileIndex])
-		err = frontMatterHandler.Split()
-		if err != nil {
-			return err
-		}
-		args[firstFileIndex] = frontMatterHandler.GetYamlFrontMatterFilename()
-
-		if frontMatter == "process" {
-			reader := frontMatterHandler.GetContentReader()
-			printer.SetAppendix(reader)
-			defer yqlib.SafelyCloseReader(reader)
-		}
-		defer frontMatterHandler.CleanUp()
-	}
-
-	switch len(args) {
-	case 0:
-		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(args[0]), args[1:], printer, leadingContentPreProcessing)
-	}
-	completedSuccessfully = err == nil
-
-	if err == nil && exitStatus && !printer.PrintedAnything() {
-		return errors.New("no matches found")
-	}
-
-	return err
-}

cmd/root.go

@@ -1,65 +0,0 @@
-package cmd
-
-import (
-	"os"
-
-	"github.com/spf13/cobra"
-	logging "gopkg.in/op/go-logging.v1"
-)
-
-func New() *cobra.Command {
-	var rootCmd = &cobra.Command{
-		Use:   "yq",
-		Short: "yq is a lightweight and portable command-line YAML processor.",
-		Long: `yq is a portable command-line YAML processor (https://github.com/mikefarah/yq/) 
-See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.`,
-		RunE: func(cmd *cobra.Command, args []string) error {
-			if version {
-				cmd.Print(GetVersionDisplay())
-				return nil
-			}
-			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}`,
-			)
-			var backend = logging.AddModuleLevel(
-				logging.NewBackendFormatter(logging.NewLogBackend(os.Stderr, "", 0), format))
-
-			if verbose {
-				backend.SetLevel(logging.DEBUG, "")
-			} else {
-				backend.SetLevel(logging.ERROR, "")
-			}
-
-			logging.SetBackend(backend)
-		},
-	}
-
-	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
-	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "output as json. Set indent to 0 to print json in one line.")
-	rootCmd.PersistentFlags().BoolVarP(&nullInput, "null-input", "n", false, "Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.")
-	rootCmd.PersistentFlags().BoolVarP(&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 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")
-
-	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().BoolVarP(&leadingContentPreProcessing, "header-preprocess", "", true, "Slurp any header comments and seperators before processing expression. This is a workaround for go-yaml to persist header content. This flag will be removed once this feature has been out in the wild for a while.")
-	rootCmd.AddCommand(
-		createEvaluateSequenceCommand(),
-		createEvaluateAllCommand(),
-		completionCmd,
-	)
-	return rootCmd
-}

cmd/shell-completion.go

@@ -1,61 +0,0 @@
-package cmd
-
-import (
-	"os"
-
-	"github.com/spf13/cobra"
-)
-
-var completionCmd = &cobra.Command{
-	Use:   "shell-completion [bash|zsh|fish|powershell]",
-	Short: "Generate completion script",
-	Long: `To load completions:
-
-Bash:
-
-$ source <(yq shell-completion bash)
-
-# To load completions for each session, execute once:
-Linux:
-  $ yq shell-completion bash > /etc/bash_completion.d/yq
-MacOS:
-  $ yq shell-completion bash > /usr/local/etc/bash_completion.d/yq
-
-Zsh:
-
-# If shell completion is not already enabled in your environment you will need
-# to enable it.  You can execute the following once:
-
-$ echo "autoload -U compinit; compinit" >> ~/.zshrc
-
-# To load completions for each session, execute once:
-$ yq shell-completion zsh > "${fpath[1]}/_yq"
-
-# You will need to start a new shell for this setup to take effect.
-
-Fish:
-
-$ yq shell-completion fish | source
-
-# To load completions for each session, execute once:
-$ yq shell-completion fish > ~/.config/fish/completions/yq.fish
-`,
-	DisableFlagsInUseLine: true,
-	ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
-	Args:                  cobra.ExactValidArgs(1),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		var err error = nil
-		switch args[0] {
-		case "bash":
-			err = cmd.Root().GenBashCompletion(os.Stdout)
-		case "zsh":
-			err = cmd.Root().GenZshCompletion(os.Stdout)
-		case "fish":
-			err = cmd.Root().GenFishCompletion(os.Stdout, true)
-		case "powershell":
-			err = cmd.Root().GenPowerShellCompletion(os.Stdout)
-		}
-		return err
-
-	},
-}

cmd/version.go

@@ -1,49 +0,0 @@
-package cmd
-
-import (
-	"fmt"
-	"strings"
-)
-
-// The git commit that was compiled. This will be filled in by the compiler.
-var (
-	GitCommit   string
-	GitDescribe string
-
-	// Version is main version number that is being run at the moment.
-	Version = "4.11.1"
-
-	// VersionPrerelease is a pre-release marker for the version. If this is "" (empty string)
-	// then it means that it is a final release. Otherwise, this is a pre-release
-	// such as "dev" (in development), "beta", "rc1", etc.
-	VersionPrerelease = ""
-)
-
-// ProductName is the name of the product
-const ProductName = "yq"
-
-// GetVersionDisplay composes the parts of the version in a way that's suitable
-// for displaying to humans.
-func GetVersionDisplay() string {
-	return fmt.Sprintf("yq (https://github.com/mikefarah/yq/) version %s\n", getHumanVersion())
-}
-
-func getHumanVersion() string {
-	version := Version
-	if GitDescribe != "" {
-		version = GitDescribe
-	}
-
-	release := VersionPrerelease
-	if release != "" {
-		if !strings.Contains(version, release) {
-			version += fmt.Sprintf("-%s", release)
-		}
-		if GitCommit != "" {
-			version += fmt.Sprintf(" (%s)", GitCommit)
-		}
-	}
-
-	// Strip off any single quotes added by the git information.
-	return strings.Replace(version, "'", "", -1)
-}

cmd/version_test.go

@@ -1,51 +0,0 @@
-package cmd
-
-import "testing"
-
-func TestGetVersionDisplay(t *testing.T) {
-	var expectedVersion = ProductName + " (https://github.com/mikefarah/yq/) version " + Version
-	if VersionPrerelease != "" {
-		expectedVersion = expectedVersion + "-" + VersionPrerelease
-	}
-	expectedVersion = expectedVersion + "\n"
-	tests := []struct {
-		name string
-		want string
-	}{
-		{
-			name: "Display Version",
-			want: expectedVersion,
-		},
-	}
-	for _, tt := range tests {
-		if got := GetVersionDisplay(); got != tt.want {
-			t.Errorf("%q. GetVersionDisplay() = %v, want %v", tt.name, got, tt.want)
-		}
-	}
-}
-
-func Test_getHumanVersion(t *testing.T) {
-	GitDescribe = "e42813d"
-	GitCommit = "e42813d+CHANGES"
-	var wanted string
-	if VersionPrerelease == "" {
-		wanted = GitDescribe
-	} else {
-		wanted = "e42813d-" + VersionPrerelease + " (e42813d+CHANGES)"
-	}
-
-	tests := []struct {
-		name string
-		want string
-	}{
-		{
-			name: "Git Variables defined",
-			want: wanted,
-		},
-	}
-	for _, tt := range tests {
-		if got := getHumanVersion(); got != tt.want {
-			t.Errorf("%q. getHumanVersion() = %v, want %v", tt.name, got, tt.want)
-		}
-	}
-}

commands/evaluate-all.md

@@ -0,0 +1,45 @@
+---
+description: >-
+  Read all documents of all given yaml files into memory, then run the given
+  expression once against the lot.
+---
+
+# Evaluate All
+
+Evaluate All is most useful when needing to run expressions that depend on multiple yaml documents or files. Merge is probably the most common reason why evaluate all would be used. Note that `eval-all` consumes more memory than `evaluate`.
+
+Like `evaluate` you can use `-` to pipe from STDIN.
+
+## Usage
+
+```bash
+yq eval-all [expression] [yaml_file1]... [flags]
+```
+
+Aliases: `eval-all, ea`
+
+## Examples
+
+```bash
+# merges f2.yml into f1.yml (inplace)
+yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml f2.yml
+
+# you can merge into a file, piping from STDIN
+cat somefile.yml | yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml -
+```
+
+## Flags
+
+```bash
+  -h, --help          help for eval-all
+  -C, --colors        force print with colors
+  -e, --exit-status   set exit status if there are no matches or null or false is returned
+  -I, --indent int    sets indent level for output (default 2)
+  -i, --inplace       update the yaml file inplace of first yaml file given.
+  -M, --no-colors     force print with no colors
+  -N, --no-doc        Don't print document separators (---)
+  -n, --null-input    Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.
+  -j, --tojson        output as json. Set indent to 0 to print json in one line.
+  -v, --verbose       verbose mode
+
+```

commands/evaluate.md

@@ -0,0 +1,56 @@
+---
+description: >-
+  Evaluates the given expression against each yaml document in each file, in
+  sequence
+---
+
+# Evaluate
+
+Note that (as of 4.18.1) this is the default command when none is supplied to yq.
+
+## Usage:
+
+```bash
+yq eval [expression] [yaml_file1]... [flags]
+```
+
+Aliases: `eval, e`
+
+Note that you can pass in `-` as a filename to pipe from STDIN.
+
+## Examples:
+
+```bash
+# runs the expression against each file, in series
+yq '.a.b | length' f1.yml f2.yml 
+
+# '-' will pipe from STDIN
+cat file.yml | yq '.a.b' f1.yml -  f2.yml
+
+# prints out the file
+yq sample.yaml 
+cat sample.yml | yq e
+
+# prints a new yaml document
+yq -n '.a.b.c = "cat"' 
+
+# updates file.yaml directly
+yq '.a.b = "cool"' -i file.yaml 
+```
+
+
+
+## Flags:
+
+```
+  -h, --help          help for eval
+  -C, --colors        force print with colors
+  -e, --exit-status   set exit status if there are no matches or null or false is returned
+  -I, --indent int    sets indent level for output (default 2)
+  -i, --inplace       update the yaml file inplace of first yaml file given.
+  -M, --no-colors     force print with no colors
+  -N, --no-doc        Don't print document separators (---)
+  -n, --null-input    Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.
+  -j, --tojson        output as json. Set indent to 0 to print json in one line.
+  -v, --verbose       verbose mode
+```

commands/shell-completion.md

@@ -0,0 +1,69 @@
+---
+description: >-
+  Generate a shell completion file for supported shells
+  (bash/fish/zsh/powershell)
+---
+
+# Shell Completion
+
+```bash
+yq shell-completion zsh
+```
+
+Prints to StdOut a shell completion script for zsh shell.
+
+### Bash (default)
+
+```bash
+source <(yq shell-completion bash)
+```
+
+#### To load completions for each session, execute once:
+
+Linux:
+
+```bash
+yq shell-completion bash > /etc/bash_completion.d/yq 
+```
+
+MacOS:
+
+```bash
+yq shell-completion bash > /usr/local/etc/bash_completion.d/yq
+```
+
+### zsh
+
+If shell completion is not already enabled in your environment you will need to enable it.  You can execute the following once:
+
+```bash
+echo "autoload -U compinit; compinit" >> ~/.zshrc
+```
+
+#### To load completions for each session, execute once:
+
+```bash
+yq shell-completion zsh > "${fpath[1]}/_yq"
+```
+
+You will need to start a new shell for this setup to take effect.
+
+### fish
+
+```bash
+yq shell-completion fish | source
+```
+
+#### To load completions for each session, execute once:
+
+```
+yq shell-completion fish > ~/.config/fish/completions/yq.fish
+```
+
+### PowerShell
+
+```bash
+yq shell-completion powershell
+```
+
+Users need PowerShell version 5.0 or above, which comes with Windows 10 and can be downloaded separately for Windows 7 or 8.1. They can then write the completions to a file and source this file from their PowerShell profile, which is referenced by the $Profile environment variable.

debian/changelog

@@ -1,85 +0,0 @@
-yq (4.9.6) focal; urgency=medium
-
-  * Added darwin/arm64 build, thanks @alecthomas
-  * Incremented docker alpine base version, thanks @da6d6i7-bronga
-  * Bug fix: multine expression
-  * Bug fix: special character
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Tue, 29 Jun 2021 21:32:14 +0200
-
-yq (3.3.2) focal; urgency=medium
-
-  * Bug fix: existStatus bug (#459)
-  * Automatically makes a os temp directory if it does not exist (#461)
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Fri, 07 Aug 2020 18:53:01 +0200
-
-yq (3.3-0) focal; urgency=medium
-
-  * You can control string styles (quotes) using the new --style flag
-  * String values now always have quotes when outputting to json
-  * Negative array indices now traverse the array backwards
-  * Added a --stripComments flag to print yaml without any comments
-  * Bumped go to version 1.14
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Thu, 30 Apr 2020 20:45:44 +0200
-
-yq (3.1-2) eoan; urgency=medium
-
-  * Bug fix: yq 3 was removing empty inline-style objects and arrays (#355)
-  * Bug fix: Merge option returned different output when switching order of 
-    merging files(#347)
-  * Bug fix: Add new object to existing array object was failing in 3.1.1 (#361)
-  * Bug fix: yq 3 empty keys did not allow merging of values (#356)
-  * Bug fix: keys quoted during merge (#363)
-  * Bug fix: Correct length with wc -l (#362)
-  * Bug fix: Write to empty document removed path (#359)
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Mon, 24 Feb 2020 20:31:58 +0100
-
-yq (3.1-1) eoan; urgency=medium
-
-  * Keeps yaml comments and formatting, can specify yaml tags when updating.
-  * Handles anchors
-  * Can print out matching paths and values when splatting
-  * JSON output works for all commands
-  * Yaml files with multiple documents are printed out as one JSON 
-    document per line.
-  * Deep splat (**) to match arbitrary paths
-  * Update scripts file format has changed to be more powerful
-  * Reading and splatting, matching results are printed once per line
-  * Bugfixing
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Tue, 11 Feb 2020 22:18:24 +0100
-
-yq (2.2-1) bionic; urgency=medium
-
-  * Added Windows support for the "--inplace" command flag
-  * Prefix now supports arrays
-  * Add prefix command
-  * Bump Alpine version to 3.8
-  * Improved docker build process
-  * Lint fixes
-  * Build support for all linux architectures supported by gox
-
- -- Roberto Mier Escandon <rmescandon@gmail.com>  Sat, 19 Jan 2019 15:50:47 +0100
-
-yq (2.1-0) bionic; urgency=medium
-
-  * Ability to read multiple documents in a single file
-  * Ability to append list items instead of overwriting
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Tue, 10 Jul 2018 14:02:42 +0200
-
-yq (2.0-0) bionic; urgency=medium
-
-  * Release 2.0.0
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Wed, 20 Jun 2018 10:29:53 +0200
-
-yq (1.15-0) bionic; urgency=medium
-
-  * Release 1.15
-
- -- Roberto Mier Escandón <rmescandon@gmail.com>  Wed, 06 Jun 2018 11:32:03 +0200
-

debian/compat

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

debian/control

@@ -1,21 +0,0 @@
-Source: yq
-Section: devel
-Priority: optional
-Maintainer: Roberto Mier Escandón <rmescandon@gmail.com>
-Build-Depends: debhelper (>=10),
-               golang-1.15,
-               rsync
-Standards-Version: 4.1.4
-Homepage: https://github.com/mikefarah/yq.git
-Vcs-Browser: https://github.com/mikefarah/yq.git
-Vcs-Git: https://github.com/mikefarah/yq.git
-XS-Go-Import-Path: github.com/mikefarah/yq
-XSBC-Original-Maintainer: Roberto Mier Escandón <rmescandon@gmail.com>
-
-Package: yq
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: lightweight and portable command-line YAML processor
- .
- The aim of the project is to be the 
- [jq](https://github.com/stedolan/jq) or sed of yaml files.

debian/copyright

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

debian/gbp.conf

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

debian/rules

@@ -1,57 +0,0 @@
-#!/usr/bin/make -f
-#
-# Copyright (C) 2018 Roberto Mier Escandón <rmescandon@gmail.com>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 3 as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-PROJECT := yq
-OWNER := mikefarah
-REPO := github.com
-GOVERSION := 1.15
-
-export DH_OPTIONS
-export DH_GOPKG := ${REPO}/${OWNER}/${PROJECT}
-export GOROOT := /usr/lib/go-${GOVERSION}
-export GOPATH := ${CURDIR}/_build
-export GOBIN := ${GOPATH}/bin
-export PATH := ${GOROOT}/bin:${GOBIN}:${PATH}
-export GOCACHE := /tmp/gocache
-export GOFLAGS := -mod=vendor
-
-SRCDIR := ${GOPATH}/src/${DH_GOPKG}
-DESTDIR := ${CURDIR}/debian/${PROJECT}
-BINDIR := /usr/bin
-ASSETSDIR := /usr/share/${PROJECT}
-
-%:
-	dh $@
-
-override_dh_auto_build:
-	mkdir -p ${SRCDIR}
-	mkdir -p ${GOBIN}
-	# copy project to local srcdir to build from there
-	rsync -avz --progress --exclude=_build --exclude=debian --exclude=tmp. --exclude=go.mod --exclude=docs . $(SRCDIR)
-	# build go code
-	(cd ${SRCDIR} && go install -buildmode=pie ./...)
-	
-override_dh_auto_test:
-	(cd ${SRCDIR} && go test -v ./...)
-
-override_dh_auto_install:
-	cp ${GOBIN}/yq ${DESTDIR}/${BINDIR}
-	cp -f ${SRCDIR}/LICENSE ${DESTDIR}/${ASSETSDIR}
-	chmod a+x ${DESTDIR}/${BINDIR}/yq
-
-override_dh_auto_clean:
-	dh_clean
-	rm -rf ${CURDIR}/_build

debian/source/format

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

debian/yq.dirs

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

examples/array.yaml

@@ -1,11 +0,0 @@
----
-- become: true
-  gather_facts: false
-  hosts: lalaland
-  name: "Apply smth"
-  roles:
-    - lala
-    - land
-  serial: 1
-- become: false
-  gather_facts: true

examples/bad.yaml

@@ -1,8 +0,0 @@
-b:
-  d: be gone
-  c: 2
-  e:
-    - name: Billy Bob # comment over here
-
----
-[123123

examples/data1-no-comments.yaml

@@ -1,4 +0,0 @@
-a: simple
-b: [1, 2]
-c:
-  test: 1

examples/data1.yaml

@@ -1,4 +0,0 @@
----
-# hi peeps
-# cool
-a: test

examples/data2.yaml

@@ -1,7 +0,0 @@
-a: other # better than the original
-b: [3, 4]
-c:
-  toast: leave
-  test: 1
-  tell: 1
-  tasty.taco: cool

examples/data3.yaml

@@ -1,4 +0,0 @@
-a: "simple" # just the best
-b: [1, 3]
-c:
-  test: 1

examples/empty.yaml

@@ -1 +0,0 @@
-# comment

examples/front-matter.yaml

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

examples/instruction_sample.yaml

@@ -1,7 +0,0 @@
-- command: update 
-  path: b.c
-  value:
-    #great 
-    things: frog # wow!
-- command: delete
-  path: b.d

examples/leading-seperator.yaml

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

examples/merge-anchor.yaml

@@ -1,19 +0,0 @@
-foo: &foo
-  a: foo_a
-  thing: foo_thing
-  c: foo_c
-
-bar: &bar
-  b: bar_b
-  thing: bar_thing
-  c: bar_c
-
-foobarList:
-  b: foobarList_b
-  <<: [*foo,*bar]
-  c: foobarList_c
-
-foobar:
-  c: foobar_c
-  <<: *foo
-  thing: foobar_thing

examples/multiline-text.yaml

@@ -1,5 +0,0 @@
-test: |
-  abcdefg    
-  hijklmno
-
-

examples/multiple_docs.yaml

@@ -1,18 +0,0 @@
-commonKey: first document
-a: Easy! as one two three
-b:
-  c: 2
-  d: [3, 4]
-  e:
-    - name: fred
-      value: 3
-    - name: sam
-      value: 4
----
-commonKey: second document
-another:
-  document: here
----
-commonKey: third document
-wow: 
-  - here is another

examples/multiple_docs_small.yaml

@@ -1,7 +0,0 @@
-a: Easy! as one two three
----
-another:
-  document: here
----
-- 1
-- 2

examples/numbered_keys.yml

@@ -1,2 +0,0 @@
-5:
-  6: camel!

examples/order.yaml

@@ -1,2 +0,0 @@
-version: 3
-application: MyApp

examples/order.yml

@@ -1,6 +0,0 @@
-version: '2'
-services:
-  test:
-    image: ubuntu:14.04
-    stdin_open: true
-    tty: true

examples/sample.json

@@ -1 +0,0 @@
-{"a":"Easy! as one two three","b":{"c":2,"d":[3,4],"e":[{"name":"fred","value":3},{"name":"sam","value":4}]},"ab":"must appear last"}

examples/sample.yaml

@@ -1,11 +0,0 @@
-# Some doc
-
-a: true
-b:
-  c: 2
-  d: [3, 4, 5]
-  e:
-    - name: fred
-      value: 3
-    - name: sam
-      value: 4

examples/sample_array.yaml

@@ -1 +0,0 @@
-[1,2,3]

examples/sample_array_2.yaml

@@ -1,2 +0,0 @@
-- 4
-- 5

examples/sample_text.yaml

@@ -1 +0,0 @@
-hi

examples/simple-anchor-exploded.yaml

@@ -1,5 +0,0 @@
-foo:
-  a: 1
-
-foobar: 
-  a: 1

examples/simple-anchor.yaml

@@ -1,5 +0,0 @@
-foo: &foo
-  a: 1
-
-foobar: 
-  <<: *foo

github-action/Dockerfile

@@ -1,8 +0,0 @@
-FROM mikefarah/yq:4.11.1
-
-COPY entrypoint.sh /entrypoint.sh
-
-# this seems to be the default user in github actions
-USER 1001
-
-ENTRYPOINT ["/entrypoint.sh"]

github-action/entrypoint.sh

@@ -1,6 +0,0 @@
-#!/bin/sh -l
-
-echo "::debug::\$cmd: $1"
-RESULT=$(eval "$1")
-echo "::debug::\$RESULT: $RESULT"
-echo ::set-output name=result::"$RESULT"

go.mod

@@ -1,16 +0,0 @@
-module github.com/mikefarah/yq/v4
-
-require (
-	github.com/elliotchance/orderedmap v1.4.0
-	github.com/fatih/color v1.10.0
-	github.com/goccy/go-yaml v1.8.9
-	github.com/jinzhu/copier v0.2.8
-	github.com/spf13/cobra v1.1.3
-	github.com/timtadh/data-structures v0.5.3 // indirect
-	github.com/timtadh/lexmachine v0.2.2
-	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
-	gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
-)
-
-go 1.15

go.sum

@@ -1,328 +0,0 @@
-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/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
-github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
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how-it-works.md

@@ -0,0 +1,183 @@
+# Expression Syntax: A Visual Guide
+In `yq`, expressions are made up of operators and pipes. A context of nodes is passed through the expression, and each operation takes the context as input and returns a new context as output. That output is piped in as input for the next operation in the expression.
+
+Let's break down the process step by step using a diagram. We'll start with a single YAML document, apply an expression, and observe how the context changes at each step.
+
+Given a document like:
+
+```yaml
+root:
+  items:
+    - name: apple
+      type: fruit
+    - name: carrot
+      type: vegetable
+    - name: banana
+      type: fruit
+```
+
+You can use dot notation to access nested structures. For example, to access the `name` of the first item, you would use the expression `.root.items[0].name`, which would return `apple`.
+
+But lets see how we could find all the fruit under `items`
+
+## Step 1: Initial Context
+The context starts at the root of the YAML document. In this case, the entire document is the initial context. 
+
+```
+root
+└── items
+    ├── name: apple
+    │   type: fruit
+    ├── name: carrot
+    │   type: vegetable
+    └── name: banana
+        type: fruit
+```
+
+## Step 2: Splatting the Array
+Using the expression `.root.items[]`, we "splat" the items array. This means each element of the array becomes its own node in the context:
+
+```
+Node 1: { name: apple, type: fruit }
+Node 2: { name: carrot, type: vegetable }
+Node 3: { name: banana, type: fruit }
+```
+
+## Step 3: Filtering the Nodes
+Next, we apply a filter to select only the nodes where type is fruit. The expression `.root.items[] | select(.type == "fruit")` filters the nodes:
+
+```
+Filtered Node 1: { name: apple, type: fruit }
+Filtered Node 2: { name: banana, type: fruit }
+```
+
+## Step 4: Extracting a Field
+Finally, we extract the name field from the filtered nodes using `.root.items[] | select(.type == "fruit") | .name` This results in:
+
+```
+apple
+banana
+```
+
+## Simple assignment example
+
+Given a document like:
+
+```yaml
+a: cat
+b: dog
+```
+
+with an expression:
+
+```
+.a = .b
+```
+
+Like math expressions - operator precedence is important. 
+
+The `=` operator takes two arguments, a `lhs` expression, which in this case is `.a` and `rhs` expression which is `.b`. 
+
+It pipes the current, lets call it 'root' context through the `lhs` expression of `.a` to return the node 
+
+```yaml
+cat
+```
+
+Side note: this node holds not only its value 'cat', but comments and metadata too, including path and parent information.
+
+The `=` operator then pipes the 'root' context through the `rhs` expression of `.b` to return the node
+
+```yaml
+dog
+```
+
+Both sides have now been evaluated, so now the operator copies across the value from the RHS (`.b`) to the LHS (`.a`), and it returns the now updated context:
+
+```yaml
+a: dog
+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. 
+
+Most of the time, this is intuitively what you'd want, for instance `.a = "cat" | .b = "dog"` is effectively: `(.a = "cat") | (.b = "dog")`.
+
+However, this is not always the case, particularly if you have a complex LHS or RHS expression, for instance if you want to select particular nodes to update. 
+
+Lets say you had:
+
+```yaml
+- name: bob
+  fruit: apple
+- name: sally
+  fruit: orange
+
+```
+
+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:
+
+```yaml
+name: sally
+fruit: mango
+```
+
+**Important**: To properly update this YAML, you must wrap the entire LHS in parentheses. Think of it like using brackets in math to ensure the correct order of operations.
+`(.[] | select(.name == "sally") | .fruit) = "mango"`
+
+
+Now that entire LHS expression is passed to the 'assign' (`=`) operator, and the yaml is correctly updated and returned:
+
+
+```yaml
+- name: bob
+  fruit: apple
+- name: sally
+  fruit: mango
+
+```
+
+## Relative update (e.g. `|=`)
+There is another form of the `=` operator which we call the relative form. It's very similar to `=` but with one key difference when evaluating the RHS expression.
+
+In the plain form, we pass in the 'root' level context to the RHS expression. In relative form, we pass in _each result of the LHS_ to the RHS expression. Let's go through an example.
+
+Given a document like:
+
+```yaml
+a: 1
+b: thing
+```
+
+with an expression:
+
+```
+.a |= . + 1
+```
+
+Similar to the `=` operator, `|=` takes two operands, the LHS and RHS.
+
+It pipes the current context (the whole document) through the LHS expression of `.a` to get the node value:
+
+```
+1
+```
+
+Now it pipes _that LHS context_ into the RHS expression `. + 1` (whereas in the `=` plain form it piped the original document context into the RHS) to yield:
+
+
+```
+2
+```
+
+The assignment operator then copies across the value from the RHS to the value on the LHS, and it returns the now updated 'root' context:
+
+```yaml
+a: 2
+b: thing
+```

mkdocs.yml

@@ -1,7 +0,0 @@
-docs_dir: mkdocs
-site_dir: docs
-site_name: Yq
-theme: 'material'
-repo_name: 'mikefarah/yq'
-repo_url: 'https://github.com/mikefarah/yq'
-

operators/README.md

@@ -0,0 +1,2 @@
+# Operators
+

operators/add.md

@@ -0,0 +1,336 @@
+# Add
+
+Add behaves differently according to the type of the LHS:
+* arrays: concatenate
+* number scalars: arithmetic addition
+* string scalars: concatenate
+* maps: shallow merge (use the multiply operator (`*`) to deeply merge)
+
+Use `+=` as a relative append assign for things like increment. Note that `.a += .x` is equivalent to running `.a = .a + .x`.
+
+
+## Concatenate arrays
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+b:
+  - 3
+  - 4
+```
+then
+```bash
+yq '.a + .b' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+- 3
+- 4
+```
+
+## Concatenate to existing array
+Note that the styling of `a` is kept.
+
+Given a sample.yml file of:
+```yaml
+a: [1,2]
+b:
+  - 3
+  - 4
+```
+then
+```bash
+yq '.a += .b' sample.yml
+```
+will output
+```yaml
+a: [1, 2, 3, 4]
+b:
+  - 3
+  - 4
+```
+
+## Concatenate null to array
+Given a sample.yml file of:
+```yaml
+a:
+  - 1
+  - 2
+```
+then
+```bash
+yq '.a + null' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+```
+
+## Append to existing array
+Note that the styling is copied from existing array elements
+
+Given a sample.yml file of:
+```yaml
+a: ['dog']
+```
+then
+```bash
+yq '.a += "cat"' sample.yml
+```
+will output
+```yaml
+a: ['dog', 'cat']
+```
+
+## Prepend to existing array
+Given a sample.yml file of:
+```yaml
+a:
+  - dog
+```
+then
+```bash
+yq '.a = ["cat"] + .a' sample.yml
+```
+will output
+```yaml
+a:
+  - cat
+  - dog
+```
+
+## Add new object to array
+Given a sample.yml file of:
+```yaml
+a:
+  - dog: woof
+```
+then
+```bash
+yq '.a + {"cat": "meow"}' sample.yml
+```
+will output
+```yaml
+- dog: woof
+- cat: meow
+```
+
+## Relative append
+Given a sample.yml file of:
+```yaml
+a:
+  a1:
+    b:
+      - cat
+  a2:
+    b:
+      - dog
+  a3: {}
+```
+then
+```bash
+yq '.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 '.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 '.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 '.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 '.[] += 1' sample.yml
+```
+will output
+```yaml
+a: 4
+b: 6
+```
+
+## Date addition
+You can add durations to dates. Assumes RFC3339 date time format, see [date-time operators](https://mikefarah.gitbook.io/yq/operators/date-time-operators) for more information.
+
+Given a sample.yml file of:
+```yaml
+a: 2021-01-01T00:00:00Z
+```
+then
+```bash
+yq '.a += "3h10m"' sample.yml
+```
+will output
+```yaml
+a: 2021-01-01T03:10:00Z
+```
+
+## Date addition - custom format
+You can add durations to dates. See [date-time operators](https://mikefarah.gitbook.io/yq/operators/date-time-operators) for more information.
+
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM GMT
+```
+then
+```bash
+yq 'with_dtf("Monday, 02-Jan-06 at 3:04PM MST", .a += "3h1m")' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 6:00AM GMT
+```
+
+## Add to null
+Adding to null simply returns the rhs
+
+Running
+```bash
+yq --null-input 'null + "cat"'
+```
+will output
+```yaml
+cat
+```
+
+## Add maps to shallow merge
+Adding objects together shallow merges them. Use `*` to deeply merge.
+
+Given a sample.yml file of:
+```yaml
+a:
+  thing:
+    name: Astuff
+    value: x
+  a1: cool
+b:
+  thing:
+    name: Bstuff
+    legs: 3
+  b1: neat
+```
+then
+```bash
+yq '.a += .b' sample.yml
+```
+will output
+```yaml
+a:
+  thing:
+    name: Bstuff
+    legs: 3
+  a1: cool
+  b1: neat
+b:
+  thing:
+    name: Bstuff
+    legs: 3
+  b1: neat
+```
+
+## Custom types: that are really strings
+When custom tags are encountered, yq will try to decode the underlying type.
+
+Given a sample.yml file of:
+```yaml
+a: !horse cat
+b: !goat _meow
+```
+then
+```bash
+yq '.a += .b' sample.yml
+```
+will output
+```yaml
+a: !horse cat_meow
+b: !goat _meow
+```
+
+## Custom types: that are really numbers
+When custom tags are encountered, yq will try to decode the underlying type.
+
+Given a sample.yml file of:
+```yaml
+a: !horse 1.2
+b: !goat 2.3
+```
+then
+```bash
+yq '.a += .b' sample.yml
+```
+will output
+```yaml
+a: !horse 3.5
+b: !goat 2.3
+```
+

operators/alternative-default-value.md

@@ -1,3 +1,5 @@
+# Alternative (Default value)
+
 This operator is used to provide alternative (or default) values when a particular expression is either null or false.
 
 ## LHS is defined
@@ -7,7 +9,7 @@ a: bridge
 ```
 then
 ```bash
-yq eval '.a // "hello"' sample.yml
+yq '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -21,7 +23,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.a // "hello"' sample.yml
+yq '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -35,7 +37,7 @@ a: ~
 ```
 then
 ```bash
-yq eval '.a // "hello"' sample.yml
+yq '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -49,7 +51,7 @@ a: false
 ```
 then
 ```bash
-yq eval '.a // "hello"' sample.yml
+yq '.a // "hello"' sample.yml
 ```
 will output
 ```yaml
@@ -64,10 +66,43 @@ b: cat
 ```
 then
 ```bash
-yq eval '.a // .b' sample.yml
+yq '.a // .b' sample.yml
 ```
 will output
 ```yaml
 cat
 ```
 
+## Update or create - entity exists
+This initialises `a` if it's not present
+
+Given a sample.yml file of:
+```yaml
+a: 1
+```
+then
+```bash
+yq '(.a // (.a = 0)) += 1' sample.yml
+```
+will output
+```yaml
+a: 2
+```
+
+## Update or create - entity does not exist
+This initialises `a` if it's not present
+
+Given a sample.yml file of:
+```yaml
+b: camel
+```
+then
+```bash
+yq '(.a // (.a = 0)) += 1' sample.yml
+```
+will output
+```yaml
+b: camel
+a: 1
+```
+

operators/anchor-and-alias-operators.md

@@ -0,0 +1,483 @@
+# Anchor and Alias Operators
+
+Use the `alias` and `anchor` operators to read and write yaml aliases and anchors. The `explode` operator normalises a yaml file (dereference (or expands) aliases and remove anchor names).
+
+`yq` supports merge keys (like `<<: *blah`) from YAML 1.1. These are no longer part of the YAML 1.2 standard, but remain common in practice. Plain `<<:` keys are recognised as merge keys and round-trip as `<<:` without an explicit `!!merge` tag. When the source uses an explicit `!!merge` tag, that is preserved on output. Internally, when `yq` synthesises a `<<` map key (for example during merge operations), it tags the key as `!!merge` rather than `!!str`.
+
+
+## NOTE --yaml-fix-merge-anchor-to-spec flag
+`yq` doesn't merge anchors `<<:` to spec, in some circumstances it incorrectly overrides existing keys when the spec documents not to do that.
+
+To minimise disruption while still fixing the issue, a flag has been added to toggle this behaviour. This will first default to false; and log warnings to users. Then it will default to true (and still allow users to specify false if needed).
+
+This flag also enables advanced merging, like inline maps, as well as fixes to ensure when exploding a particular path, neighbours are not affect ed.
+
+Long story short, you should be setting this flag to true.
+
+See examples of the flag differences below, where LEGACY is with the flag off; and FIXED is with the flag on.
+
+
+## Merge one map
+see https://yaml.org/type/merge.html
+
+Given a sample.yml file of:
+```yaml
+- &CENTRE
+  x: 1
+  y: 2
+- &LEFT
+  x: 0
+  y: 2
+- &BIG
+  r: 10
+- &SMALL
+  r: 1
+- <<: *CENTRE
+  r: 10
+```
+then
+```bash
+yq '.[4] | explode(.)' sample.yml
+```
+will output
+```yaml
+x: 1
+y: 2
+r: 10
+```
+
+## Get anchor
+Given a sample.yml file of:
+```yaml
+a: &billyBob cat
+```
+then
+```bash
+yq '.a | anchor' sample.yml
+```
+will output
+```yaml
+billyBob
+```
+
+## Set anchor
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq '.a anchor = "foobar"' sample.yml
+```
+will output
+```yaml
+a: &foobar cat
+```
+
+## Set anchor relatively using assign-update
+Given a sample.yml file of:
+```yaml
+a:
+  b: cat
+```
+then
+```bash
+yq '.a anchor |= .b' sample.yml
+```
+will output
+```yaml
+a: &cat
+  b: cat
+```
+
+## Get alias
+Given a sample.yml file of:
+```yaml
+b: &billyBob meow
+a: *billyBob
+```
+then
+```bash
+yq '.a | alias' sample.yml
+```
+will output
+```yaml
+billyBob
+```
+
+## Set alias
+Given a sample.yml file of:
+```yaml
+b: &meow purr
+a: cat
+```
+then
+```bash
+yq '.a alias = "meow"' sample.yml
+```
+will output
+```yaml
+b: &meow purr
+a: *meow
+```
+
+## Set alias to blank does nothing
+Given a sample.yml file of:
+```yaml
+b: &meow purr
+a: cat
+```
+then
+```bash
+yq '.a alias = ""' sample.yml
+```
+will output
+```yaml
+b: &meow purr
+a: cat
+```
+
+## Set alias relatively using assign-update
+Given a sample.yml file of:
+```yaml
+b: &meow purr
+a:
+  f: meow
+```
+then
+```bash
+yq '.a alias |= .f' sample.yml
+```
+will output
+```yaml
+b: &meow purr
+a: *meow
+```
+
+## Explode alias and anchor
+Given a sample.yml file of:
+```yaml
+f:
+  a: &a cat
+  b: *a
+```
+then
+```bash
+yq 'explode(.f)' sample.yml
+```
+will output
+```yaml
+f:
+  a: cat
+  b: cat
+```
+
+## Explode with no aliases or anchors
+Given a sample.yml file of:
+```yaml
+a: mike
+```
+then
+```bash
+yq 'explode(.a)' sample.yml
+```
+will output
+```yaml
+a: mike
+```
+
+## Explode with alias keys
+Given a sample.yml file of:
+```yaml
+f:
+  a: &a cat
+  *a : b
+```
+then
+```bash
+yq 'explode(.f)' sample.yml
+```
+will output
+```yaml
+f:
+  a: cat
+  cat: b
+```
+
+## Dereference and update a field
+Use explode with multiply to dereference an object
+
+Given a sample.yml file of:
+```yaml
+item_value: &item_value
+  value: true
+thingOne:
+  name: item_1
+  <<: *item_value
+thingTwo:
+  name: item_2
+  <<: *item_value
+```
+then
+```bash
+yq '.thingOne |= (explode(.) | sort_keys(.)) * {"value": false}' sample.yml
+```
+will output
+```yaml
+item_value: &item_value
+  value: true
+thingOne:
+  name: item_1
+  value: false
+thingTwo:
+  name: item_2
+  <<: *item_value
+```
+
+## LEGACY: Explode with merge anchors
+Caution: this is for when --yaml-fix-merge-anchor-to-spec=false; it's not to YAML spec because the merge anchors incorrectly override the object values (foobarList.b is set to bar_b when it should still be foobarList_b). Flag will default to true in late 2025
+
+Given a sample.yml file of:
+```yaml
+foo: &foo
+  a: foo_a
+  thing: foo_thing
+  c: foo_c
+bar: &bar
+  b: bar_b
+  thing: bar_thing
+  c: bar_c
+foobarList:
+  b: foobarList_b
+  <<:
+    - *foo
+    - *bar
+  c: foobarList_c
+foobar:
+  c: foobar_c
+  <<: *foo
+  thing: foobar_thing
+```
+then
+```bash
+yq 'explode(.)' sample.yml
+```
+will output
+```yaml
+foo:
+  a: foo_a
+  thing: foo_thing
+  c: foo_c
+bar:
+  b: bar_b
+  thing: bar_thing
+  c: bar_c
+foobarList:
+  b: bar_b
+  thing: foo_thing
+  c: foobarList_c
+  a: foo_a
+foobar:
+  c: foo_c
+  a: foo_a
+  thing: foobar_thing
+```
+
+## LEGACY: Merge multiple maps
+see https://yaml.org/type/merge.html. This has the correct data, but the wrong key order; set --yaml-fix-merge-anchor-to-spec=true to fix the key order.
+
+Given a sample.yml file of:
+```yaml
+- &CENTRE
+  x: 1
+  y: 2
+- &LEFT
+  x: 0
+  y: 2
+- &BIG
+  r: 10
+- &SMALL
+  r: 1
+- <<:
+    - *CENTRE
+    - *BIG
+```
+then
+```bash
+yq '.[4] | explode(.)' sample.yml
+```
+will output
+```yaml
+r: 10
+x: 1
+y: 2
+```
+
+## LEGACY: Override
+see https://yaml.org/type/merge.html. This has the correct data, but the wrong key order; set --yaml-fix-merge-anchor-to-spec=true to fix the key order.
+
+Given a sample.yml file of:
+```yaml
+- &CENTRE
+  x: 1
+  y: 2
+- &LEFT
+  x: 0
+  y: 2
+- &BIG
+  r: 10
+- &SMALL
+  r: 1
+- <<:
+    - *BIG
+    - *LEFT
+    - *SMALL
+  x: 1
+```
+then
+```bash
+yq '.[4] | explode(.)' sample.yml
+```
+will output
+```yaml
+r: 10
+x: 1
+y: 2
+```
+
+## FIXED: Explode with merge anchors
+Set `--yaml-fix-merge-anchor-to-spec=true` to get this correct merge behaviour (flag will default to true in late 2025).
+Observe that foobarList.b property is still foobarList_b.
+
+Given a sample.yml file of:
+```yaml
+foo: &foo
+  a: foo_a
+  thing: foo_thing
+  c: foo_c
+bar: &bar
+  b: bar_b
+  thing: bar_thing
+  c: bar_c
+foobarList:
+  b: foobarList_b
+  <<:
+    - *foo
+    - *bar
+  c: foobarList_c
+foobar:
+  c: foobar_c
+  <<: *foo
+  thing: foobar_thing
+```
+then
+```bash
+yq 'explode(.)' sample.yml
+```
+will output
+```yaml
+foo:
+  a: foo_a
+  thing: foo_thing
+  c: foo_c
+bar:
+  b: bar_b
+  thing: bar_thing
+  c: bar_c
+foobarList:
+  b: foobarList_b
+  a: foo_a
+  thing: foo_thing
+  c: foobarList_c
+foobar:
+  c: foobar_c
+  a: foo_a
+  thing: foobar_thing
+```
+
+## FIXED: Merge multiple maps
+Set `--yaml-fix-merge-anchor-to-spec=true` to get this correct merge behaviour (flag will default to true in late 2025).
+Taken from https://yaml.org/type/merge.html. Same values as legacy, but with the correct key order.
+
+Given a sample.yml file of:
+```yaml
+- &CENTRE
+  x: 1
+  y: 2
+- &LEFT
+  x: 0
+  y: 2
+- &BIG
+  r: 10
+- &SMALL
+  r: 1
+- <<:
+    - *CENTRE
+    - *BIG
+```
+then
+```bash
+yq '.[4] | explode(.)' sample.yml
+```
+will output
+```yaml
+x: 1
+y: 2
+r: 10
+```
+
+## FIXED: Override
+Set `--yaml-fix-merge-anchor-to-spec=true` to get this correct merge behaviour (flag will default to true in late 2025).
+Taken from https://yaml.org/type/merge.html. Same values as legacy, but with the correct key order.
+
+Given a sample.yml file of:
+```yaml
+- &CENTRE
+  x: 1
+  y: 2
+- &LEFT
+  x: 0
+  y: 2
+- &BIG
+  r: 10
+- &SMALL
+  r: 1
+- <<:
+    - *BIG
+    - *LEFT
+    - *SMALL
+  x: 1
+```
+then
+```bash
+yq '.[4] | explode(.)' sample.yml
+```
+will output
+```yaml
+r: 10
+y: 2
+x: 1
+```
+
+## Exploding inline merge anchor
+Set `--yaml-fix-merge-anchor-to-spec=true` to get this correct merge behaviour (flag will default to true in late 2025).
+
+
+Given a sample.yml file of:
+```yaml
+a:
+  b: &b 42
+<<:
+  c: *b
+```
+then
+```bash
+yq 'explode(.) | sort_keys(.)' sample.yml
+```
+will output
+```yaml
+a:
+  b: 42
+c: 42
+```
+

operators/array-to-map.md

@@ -0,0 +1,28 @@
+# Array to Map
+
+Use this operator to convert an array to..a map. The indices are used as map keys, null values in the array are skipped over.
+
+Behind the scenes, this is implemented using reduce:
+
+```
+(.[] | select(. != null) ) as $i ireduce({}; .[$i | key] = $i)
+```
+
+## Simple example
+Given a sample.yml file of:
+```yaml
+cool:
+  - null
+  - null
+  - hello
+```
+then
+```bash
+yq '.cool |= array_to_map' sample.yml
+```
+will output
+```yaml
+cool:
+  2: hello
+```
+

operators/assign-update.md

@@ -1,8 +1,21 @@
+# Assign (Update)
+
+This operator is used to update node values. It can be used in either the:
+
+### plain form: `=`
+Which will set the LHS node values equal to the RHS node values. The RHS expression is run against the matching nodes in the pipeline.
+
+### relative form: `|=`
+This will do a similar thing to the plain form, but the RHS expression is run with _each LHS node as context_. This is useful for updating values based on old values, e.g. increment.
+
+
+### Flags
+- `c` clobber custom tags
 
 ## Create yaml file
 Running
 ```bash
-yq eval --null-input '.a.b = "cat" | .x = "frog"'
+yq --null-input '.a.b = "cat" | .x = "frog"'
 ```
 will output
 ```yaml
@@ -20,7 +33,7 @@ a:
 ```
 then
 ```bash
-yq eval '.a |= .b' sample.yml
+yq '.a |= .b' sample.yml
 ```
 will output
 ```yaml
@@ -37,7 +50,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] |= . * 2' sample.yml
+yq '.[] |= . * 2' sample.yml
 ```
 will output
 ```yaml
@@ -76,7 +89,7 @@ b: sibling
 ```
 then
 ```bash
-yq eval '.a = .b' sample.yml
+yq '.a = .b' sample.yml
 ```
 will output
 ```yaml
@@ -93,13 +106,13 @@ c: fieldC
 ```
 then
 ```bash
-yq eval '(.a, .c) = "potatoe"' sample.yml
+yq '(.a, .c) = "potato"' sample.yml
 ```
 will output
 ```yaml
-a: potatoe
+a: potato
 b: fieldB
-c: potatoe
+c: potato
 ```
 
 ## Update string value
@@ -110,7 +123,7 @@ a:
 ```
 then
 ```bash
-yq eval '.a.b = "frog"' sample.yml
+yq '.a.b = "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -128,7 +141,7 @@ a:
 ```
 then
 ```bash
-yq eval '.a.b |= "frog"' sample.yml
+yq '.a.b |= "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -136,7 +149,9 @@ a:
   b: frog
 ```
 
-## Update selected results
+## 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.
+
 Given a sample.yml file of:
 ```yaml
 a:
@@ -145,7 +160,7 @@ a:
 ```
 then
 ```bash
-yq eval '(.a[] | select(. == "apple")) = "frog"' sample.yml
+yq '(.a[] | select(. == "apple")) = "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -163,7 +178,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '(.[] | select(. == "*andy")) = "bogs"' sample.yml
+yq '(.[] | select(. == "*andy")) = "bogs"' sample.yml
 ```
 will output
 ```yaml
@@ -179,11 +194,28 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.a.b |= "bogs"' sample.yml
+yq '.a.b |= "bogs"' sample.yml
 ```
 will output
 ```yaml
-{a: {b: bogs}}
+a:
+  b: bogs
+```
+
+## Update node value that has an anchor
+Anchor will remain
+
+Given a sample.yml file of:
+```yaml
+a: &cool cat
+```
+then
+```bash
+yq '.a = "dog"' sample.yml
+```
+will output
+```yaml
+a: &cool dog
 ```
 
 ## Update empty object and array
@@ -193,10 +225,46 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.a.b.[0] |= "bogs"' sample.yml
+yq '.a.b.[0] |= "bogs"' sample.yml
 ```
 will output
 ```yaml
-{a: {b: [bogs]}}
+a:
+  b:
+    - bogs
+```
+
+## Custom types are maintained by default
+Given a sample.yml file of:
+```yaml
+a: !cat meow
+b: !dog woof
+```
+then
+```bash
+yq '.a = .b' sample.yml
+```
+will output
+```yaml
+a: !cat woof
+b: !dog woof
+```
+
+## Custom types: clobber
+Use the `c` option to clobber custom tags
+
+Given a sample.yml file of:
+```yaml
+a: !cat meow
+b: !dog woof
+```
+then
+```bash
+yq '.a =c .b' sample.yml
+```
+will output
+```yaml
+a: !dog woof
+b: !dog woof
 ```
 

operators/boolean-operators.md

@@ -1,27 +1,53 @@
+# Boolean Operators
+
 The `or` and `and` operators take two parameters and return a boolean result. 
 
 `not` flips a boolean from true to false, or vice versa. 
 
-`any` will return `true` if there are any `true` values in a array sequence, and `all` will return true if _all_ elements in an array are true.
+`any` will return `true` if there are any `true` values in an array sequence, and `all` will return true if _all_ elements in an array are true.
 
 `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)
+
 ## `or` example
 Running
 ```bash
-yq eval --null-input 'true or false'
+yq --null-input 'true or false'
 ```
 will output
 ```yaml
 true
 ```
 
+## "yes" and "no" are strings
+In the yaml 1.2 standard, support for yes/no as booleans was dropped - they are now considered strings. See '10.2.1.2. Boolean' in https://yaml.org/spec/1.2.2/
+
+Given a sample.yml file of:
+```yaml
+- yes
+- no
+```
+then
+```bash
+yq '.[] | tag' sample.yml
+```
+will output
+```yaml
+!!str
+!!str
+```
+
 ## `and` example
 Running
 ```bash
-yq eval --null-input 'true and false'
+yq --null-input 'true and false'
 ```
 will output
 ```yaml
@@ -40,7 +66,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '[.[] | select(.a == "cat" or .b == "dog")]' sample.yml
+yq '[.[] | select(.a == "cat" or .b == "dog")]' sample.yml
 ```
 will output
 ```yaml
@@ -58,7 +84,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'any' sample.yml
+yq 'any' sample.yml
 ```
 will output
 ```yaml
@@ -72,7 +98,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'any' sample.yml
+yq 'any' sample.yml
 ```
 will output
 ```yaml
@@ -91,7 +117,7 @@ b:
 ```
 then
 ```bash
-yq eval '.[] |= any_c(. == "awesome")' sample.yml
+yq '.[] |= any_c(. == "awesome")' sample.yml
 ```
 will output
 ```yaml
@@ -107,7 +133,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'all' sample.yml
+yq 'all' sample.yml
 ```
 will output
 ```yaml
@@ -121,7 +147,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'all' sample.yml
+yq 'all' sample.yml
 ```
 will output
 ```yaml
@@ -140,7 +166,7 @@ b:
 ```
 then
 ```bash
-yq eval '.[] |= all_c(tag == "!!str")' sample.yml
+yq '.[] |= all_c(tag == "!!str")' sample.yml
 ```
 will output
 ```yaml
@@ -151,7 +177,7 @@ b: false
 ## Not true is false
 Running
 ```bash
-yq eval --null-input 'true | not'
+yq --null-input 'true | not'
 ```
 will output
 ```yaml
@@ -161,7 +187,7 @@ false
 ## Not false is true
 Running
 ```bash
-yq eval --null-input 'false | not'
+yq --null-input 'false | not'
 ```
 will output
 ```yaml
@@ -171,7 +197,7 @@ true
 ## String values considered to be true
 Running
 ```bash
-yq eval --null-input '"cat" | not'
+yq --null-input '"cat" | not'
 ```
 will output
 ```yaml
@@ -181,7 +207,7 @@ false
 ## Empty string value considered to be true
 Running
 ```bash
-yq eval --null-input '"" | not'
+yq --null-input '"" | not'
 ```
 will output
 ```yaml
@@ -191,7 +217,7 @@ false
 ## Numbers are considered to be true
 Running
 ```bash
-yq eval --null-input '1 | not'
+yq --null-input '1 | not'
 ```
 will output
 ```yaml
@@ -201,7 +227,7 @@ false
 ## Zero is considered to be true
 Running
 ```bash
-yq eval --null-input '0 | not'
+yq --null-input '0 | not'
 ```
 will output
 ```yaml
@@ -211,7 +237,7 @@ false
 ## Null is considered to be false
 Running
 ```bash
-yq eval --null-input '~ | not'
+yq --null-input '~ | not'
 ```
 will output
 ```yaml

operators/collect-into-array.md

@@ -6,7 +6,7 @@ This creates an array using the expression between the square brackets.
 ## Collect empty
 Running
 ```bash
-yq eval --null-input '[]'
+yq --null-input '[]'
 ```
 will output
 ```yaml
@@ -16,7 +16,7 @@ will output
 ## Collect single
 Running
 ```bash
-yq eval --null-input '["cat"]'
+yq --null-input '["cat"]'
 ```
 will output
 ```yaml
@@ -31,7 +31,7 @@ b: dog
 ```
 then
 ```bash
-yq eval '[.a, .b]' sample.yml
+yq '[.a, .b]' sample.yml
 ```
 will output
 ```yaml

operators/column.md

@@ -0,0 +1,62 @@
+# Column
+
+Returns the column of the matching node. Starts from 1, 0 indicates there was no column data.
+
+Column is the number of characters that precede that node on the line it starts.
+
+## Returns column of _value_ node
+Given a sample.yml file of:
+```yaml
+a: cat
+b: bob
+```
+then
+```bash
+yq '.b | column' sample.yml
+```
+will output
+```yaml
+4
+```
+
+## Returns column of _key_ node
+Pipe through the key operator to get the column of the key
+
+Given a sample.yml file of:
+```yaml
+a: cat
+b: bob
+```
+then
+```bash
+yq '.b | key | column' sample.yml
+```
+will output
+```yaml
+1
+```
+
+## First column is 1
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq '.a | key | column' sample.yml
+```
+will output
+```yaml
+1
+```
+
+## No column data is 0
+Running
+```bash
+yq --null-input '{"a": "new entry"} | column'
+```
+will output
+```yaml
+0
+```
+

operators/comment-operators.md

@@ -0,0 +1,339 @@
+# Comment Operators
+
+Use these comment operators to set or retrieve comments. Note that line comments on maps/arrays are actually set on the _key_ node as opposed to the _value_ (map/array). See below for examples.
+
+Like the `=` and `|=` assign operators, the same syntax applies when updating comments:
+
+### plain form: `=`
+This will set the LHS nodes' comments equal to the expression on the RHS. The RHS is run against the matching nodes in the pipeline
+
+### relative form: `|=` 
+This is similar to the plain form, but it evaluates the RHS with _each matching LHS node as context_. This is useful if you want to set the comments as a relative expression of the node, for instance its value or path.
+
+## Set line comment
+Set the comment on the key node for more reliability (see below).
+
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq '.a line_comment="single"' sample.yml
+```
+will output
+```yaml
+a: cat # single
+```
+
+## Set line comment of a maps/arrays
+For maps and arrays, you need to set the line comment on the _key_ node. This will also work for scalars.
+
+Given a sample.yml file of:
+```yaml
+a:
+  b: things
+```
+then
+```bash
+yq '(.a | key) line_comment="single"' sample.yml
+```
+will output
+```yaml
+a: # single
+  b: things
+```
+
+## Use update assign to perform relative updates
+Given a sample.yml file of:
+```yaml
+a: cat
+b: dog
+```
+then
+```bash
+yq '.. line_comment |= .' sample.yml
+```
+will output
+```yaml
+a: cat # cat
+b: dog # dog
+```
+
+## Where is the comment - map key example
+The underlying yaml parser can assign comments in a document to surprising nodes. Use an expression like this to find where you comment is. 'p' indicates the path, 'isKey' is if the node is a map key (as opposed to a map value).
+From this, you can see the 'hello-world-comment' is actually on the 'hello' key
+
+Given a sample.yml file of:
+```yaml
+hello: # hello-world-comment
+  message: world
+```
+then
+```bash
+yq '[... | {"p": path | join("."), "isKey": is_key, "hc": headComment, "lc": lineComment, "fc": footComment}]' sample.yml
+```
+will output
+```yaml
+- p: ""
+  isKey: false
+  hc: ""
+  lc: ""
+  fc: ""
+- p: hello
+  isKey: true
+  hc: ""
+  lc: hello-world-comment
+  fc: ""
+- p: hello
+  isKey: false
+  hc: ""
+  lc: ""
+  fc: ""
+- p: hello.message
+  isKey: true
+  hc: ""
+  lc: ""
+  fc: ""
+- p: hello.message
+  isKey: false
+  hc: ""
+  lc: ""
+  fc: ""
+```
+
+## Retrieve comment - map key example
+From the previous example, we know that the comment is on the 'hello' _key_ as a lineComment
+
+Given a sample.yml file of:
+```yaml
+hello: # hello-world-comment
+  message: world
+```
+then
+```bash
+yq '.hello | key | line_comment' sample.yml
+```
+will output
+```yaml
+hello-world-comment
+```
+
+## Where is the comment - array example
+The underlying yaml parser can assign comments in a document to surprising nodes. Use an expression like this to find where you comment is. 'p' indicates the path, 'isKey' is if the node is a map key (as opposed to a map value).
+From this, you can see the 'under-name-comment' is actually on the first child
+
+Given a sample.yml file of:
+```yaml
+name:
+  # under-name-comment
+  - first-array-child
+```
+then
+```bash
+yq '[... | {"p": path | join("."), "isKey": is_key, "hc": headComment, "lc": lineComment, "fc": footComment}]' sample.yml
+```
+will output
+```yaml
+- p: ""
+  isKey: false
+  hc: ""
+  lc: ""
+  fc: ""
+- p: name
+  isKey: true
+  hc: ""
+  lc: ""
+  fc: ""
+- p: name
+  isKey: false
+  hc: ""
+  lc: ""
+  fc: ""
+- p: name.0
+  isKey: false
+  hc: under-name-comment
+  lc: ""
+  fc: ""
+```
+
+## Retrieve comment - array example
+From the previous example, we know that the comment is on the first child as a headComment
+
+Given a sample.yml file of:
+```yaml
+name:
+  # under-name-comment
+  - first-array-child
+```
+then
+```bash
+yq '.name[0] | headComment' sample.yml
+```
+will output
+```yaml
+under-name-comment
+```
+
+## Set head comment
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq '. head_comment="single"' sample.yml
+```
+will output
+```yaml
+# single
+a: cat
+```
+
+## Set head comment of a map entry
+Given a sample.yml file of:
+```yaml
+f: foo
+a:
+  b: cat
+```
+then
+```bash
+yq '(.a | key) head_comment="single"' sample.yml
+```
+will output
+```yaml
+f: foo
+# single
+a:
+  b: cat
+```
+
+## Set foot comment, using an expression
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq '. foot_comment=.a' sample.yml
+```
+will output
+```yaml
+a: cat
+# cat
+```
+
+## Remove comment
+Given a sample.yml file of:
+```yaml
+a: cat # comment
+b: dog # leave this
+```
+then
+```bash
+yq '.a line_comment=""' sample.yml
+```
+will output
+```yaml
+a: cat
+b: dog # leave this
+```
+
+## Remove (strip) all comments
+Note the use of `...` to ensure key nodes are included.
+
+Given a sample.yml file of:
+```yaml
+# hi
+
+a: cat # comment
+# great
+b: # key comment
+```
+then
+```bash
+yq '... comments=""' sample.yml
+```
+will output
+```yaml
+a: cat
+b:
+```
+
+## Get line comment
+Given a sample.yml file of:
+```yaml
+# welcome!
+
+a: cat # meow
+# have a great day
+```
+then
+```bash
+yq '.a | line_comment' sample.yml
+```
+will output
+```yaml
+meow
+```
+
+## Get head comment
+Given a sample.yml file of:
+```yaml
+# welcome!
+
+a: cat # meow
+
+# have a great day
+```
+then
+```bash
+yq '. | head_comment' sample.yml
+```
+will output
+```yaml
+welcome!
+
+```
+
+## Head comment with document split
+Given a sample.yml file of:
+```yaml
+# welcome!
+---
+# bob
+a: cat # meow
+
+# have a great day
+```
+then
+```bash
+yq 'head_comment' sample.yml
+```
+will output
+```yaml
+welcome!
+bob
+```
+
+## Get foot comment
+Given a sample.yml file of:
+```yaml
+# welcome!
+
+a: cat # meow
+
+# have a great day
+# no really
+```
+then
+```bash
+yq '. | foot_comment' sample.yml
+```
+will output
+```yaml
+have a great day
+no really
+```
+

operators/compare.md

@@ -0,0 +1,100 @@
+# Compare Operators
+
+Comparison operators (`>`, `>=`, `<`, `<=`) can be used for comparing scalar values of the same time.
+
+The following types are currently supported:
+
+- numbers
+- strings
+- datetimes
+
+## Related Operators
+
+- equals / not equals (`==`, `!=`) operators [here](https://mikefarah.gitbook.io/yq/operators/equals)
+- 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)
+
+## Compare numbers (>)
+Given a sample.yml file of:
+```yaml
+a: 5
+b: 4
+```
+then
+```bash
+yq '.a > .b' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Compare equal numbers (>=)
+Given a sample.yml file of:
+```yaml
+a: 5
+b: 5
+```
+then
+```bash
+yq '.a >= .b' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Compare strings
+Compares strings by their bytecode.
+
+Given a sample.yml file of:
+```yaml
+a: zoo
+b: apple
+```
+then
+```bash
+yq '.a > .b' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Compare date times
+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.
+
+Given a sample.yml file of:
+```yaml
+a: 2021-01-01T03:10:00Z
+b: 2020-01-01T03:10:00Z
+```
+then
+```bash
+yq '.a > .b' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Both sides are null: > is false
+Running
+```bash
+yq --null-input '.a > .b'
+```
+will output
+```yaml
+false
+```
+
+## Both sides are null: >= is true
+Running
+```bash
+yq --null-input '.a >= .b'
+```
+will output
+```yaml
+true
+```
+

operators/contains.md

@@ -0,0 +1,114 @@
+# Contains
+
+This returns `true` if the context contains the passed in parameter, and false otherwise. For arrays, this will return true if the passed in array is contained within the array. For strings, it will return true if the string is a substring.
+
+{% hint style="warning" %}
+
+_Note_ that, just like jq, when checking if an array of strings `contains` another, this will use `contains` and _not_ equals to check each string. This means an expression like `contains(["cat"])` will return true for an array `["cats"]`.
+
+See the "Array has a subset array" example below on how to check for a subset.
+
+{% endhint %}
+
+## Array contains array
+Array is equal or subset of
+
+Given a sample.yml file of:
+```yaml
+- foobar
+- foobaz
+- blarp
+```
+then
+```bash
+yq 'contains(["baz", "bar"])' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Array has a subset array
+Subtract the superset array from the subset, if there's anything left, it's not a subset
+
+Given a sample.yml file of:
+```yaml
+- foobar
+- foobaz
+- blarp
+```
+then
+```bash
+yq '["baz", "bar"] - . | length == 0' sample.yml
+```
+will output
+```yaml
+false
+```
+
+## Object included in array
+Given a sample.yml file of:
+```yaml
+"foo": 12
+"bar":
+  - 1
+  - 2
+  - "barp": 12
+    "blip": 13
+```
+then
+```bash
+yq 'contains({"bar": [{"barp": 12}]})' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## Object not included in array
+Given a sample.yml file of:
+```yaml
+"foo": 12
+"bar":
+  - 1
+  - 2
+  - "barp": 12
+    "blip": 13
+```
+then
+```bash
+yq 'contains({"foo": 12, "bar": [{"barp": 15}]})' sample.yml
+```
+will output
+```yaml
+false
+```
+
+## String contains substring
+Given a sample.yml file of:
+```yaml
+foobar
+```
+then
+```bash
+yq 'contains("bar")' sample.yml
+```
+will output
+```yaml
+true
+```
+
+## String equals string
+Given a sample.yml file of:
+```yaml
+meow
+```
+then
+```bash
+yq 'contains("meow")' sample.yml
+```
+will output
+```yaml
+true
+```
+

operators/create-collect-into-object.md

@@ -1,8 +1,11 @@
+# Create, Collect into Object
+
 This is used to construct objects (or maps). This can be used against existing yaml, or to create fresh yaml documents.
+
 ## Collect empty object
 Running
 ```bash
-yq eval --null-input '{}'
+yq --null-input '{}'
 ```
 will output
 ```yaml
@@ -16,7 +19,7 @@ name: Mike
 ```
 then
 ```bash
-yq eval '{"wrap": .}' sample.yml
+yq '{"wrap": .}' sample.yml
 ```
 will output
 ```yaml
@@ -34,7 +37,7 @@ pets:
 ```
 then
 ```bash
-yq eval '{.name: .pets.[]}' sample.yml
+yq '{.name: .pets.[]}' sample.yml
 ```
 will output
 ```yaml
@@ -57,12 +60,13 @@ pets:
 ```
 then
 ```bash
-yq eval '{.name: .pets.[]}' sample.yml
+yq '{.name: .pets.[]}' sample.yml
 ```
 will output
 ```yaml
 Mike: cat
 Mike: dog
+---
 Rosey: monkey
 Rosey: sheep
 ```
@@ -70,10 +74,23 @@ Rosey: sheep
 ## Creating yaml from scratch
 Running
 ```bash
-yq eval --null-input '{"wrap": "frog"}'
+yq --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
+```
+

operators/datetime.md

@@ -0,0 +1,221 @@
+# Date Time
+
+Various operators for parsing and manipulating dates. 
+
+## Date time formatting
+This uses Golang's built in time library for parsing and formatting date times.
+
+When not specified, the RFC3339 standard is assumed `2006-01-02T15:04:05Z07:00` for parsing.
+
+To specify a custom parsing format, use the `with_dtf` operator. The first parameter sets the datetime parsing format for the expression in the second parameter. The expression can be any valid `yq` expression tree.
+
+```bash
+yq 'with_dtf("myformat"; .a + "3h" | tz("Australia/Melbourne"))'
+```
+
+See the [library docs](https://pkg.go.dev/time#pkg-constants) for examples of formatting options.
+
+
+## Timezones
+This uses Golang's built in LoadLocation function to parse timezones strings. See the [library docs](https://pkg.go.dev/time#LoadLocation) for more details.
+
+
+## Durations
+Durations are parsed using Golang's built in [ParseDuration](https://pkg.go.dev/time#ParseDuration) function.
+
+You can add durations to time using the `+` operator.
+
+## Format: from standard RFC3339 format
+Providing a single parameter assumes a standard RFC3339 datetime format. If the target format is not a valid yaml datetime format, the result will be a string tagged node.
+
+Given a sample.yml file of:
+```yaml
+a: 2001-12-15T02:59:43.1Z
+```
+then
+```bash
+yq '.a |= format_datetime("Monday, 02-Jan-06 at 3:04PM")' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM
+```
+
+## Format: from custom date time
+Use with_dtf to set a custom datetime format for parsing.
+
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM
+```
+then
+```bash
+yq '.a |= with_dtf("Monday, 02-Jan-06 at 3:04PM"; format_datetime("2006-01-02"))' sample.yml
+```
+will output
+```yaml
+a: 2001-12-15
+```
+
+## Format: get the day of the week
+Given a sample.yml file of:
+```yaml
+a: 2001-12-15
+```
+then
+```bash
+yq '.a | format_datetime("Monday")' sample.yml
+```
+will output
+```yaml
+Saturday
+```
+
+## Now
+Given a sample.yml file of:
+```yaml
+a: cool
+```
+then
+```bash
+yq '.updated = now' sample.yml
+```
+will output
+```yaml
+a: cool
+updated: 2021-05-19T01:02:03Z
+```
+
+## From Unix
+Converts from unix time. Note, you don't have to pipe through the tz operator :)
+
+Running
+```bash
+yq --null-input '1675301929 | from_unix | tz("UTC")'
+```
+will output
+```yaml
+2023-02-02T01:38:49Z
+```
+
+## To Unix
+Converts to unix time
+
+Running
+```bash
+yq --null-input 'now | to_unix'
+```
+will output
+```yaml
+1621386123
+```
+
+## Timezone: from standard RFC3339 format
+Returns a new datetime in the specified timezone. Specify standard IANA Time Zone format or 'utc', 'local'. When given a single parameter, this assumes the datetime is in RFC3339 format.
+
+Given a sample.yml file of:
+```yaml
+a: cool
+```
+then
+```bash
+yq '.updated = (now | tz("Australia/Sydney"))' sample.yml
+```
+will output
+```yaml
+a: cool
+updated: 2021-05-19T11:02:03+10:00
+```
+
+## Timezone: with custom format
+Specify standard IANA Time Zone format or 'utc', 'local'
+
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM GMT
+```
+then
+```bash
+yq '.a |= with_dtf("Monday, 02-Jan-06 at 3:04PM MST"; tz("Australia/Sydney"))' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 1:59PM AEDT
+```
+
+## Add and tz custom format
+Specify standard IANA Time Zone format or 'utc', 'local'
+
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM GMT
+```
+then
+```bash
+yq '.a |= with_dtf("Monday, 02-Jan-06 at 3:04PM MST"; tz("Australia/Sydney"))' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 1:59PM AEDT
+```
+
+## Date addition
+Given a sample.yml file of:
+```yaml
+a: 2021-01-01T00:00:00Z
+```
+then
+```bash
+yq '.a += "3h10m"' sample.yml
+```
+will output
+```yaml
+a: 2021-01-01T03:10:00Z
+```
+
+## Date subtraction
+You can subtract durations from dates. Assumes RFC3339 date time format, see [date-time operators](https://mikefarah.gitbook.io/yq/operators/datetime#date-time-formattings) for more information.
+
+Given a sample.yml file of:
+```yaml
+a: 2021-01-01T03:10:00Z
+```
+then
+```bash
+yq '.a -= "3h10m"' sample.yml
+```
+will output
+```yaml
+a: 2021-01-01T00:00:00Z
+```
+
+## Date addition - custom format
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM GMT
+```
+then
+```bash
+yq 'with_dtf("Monday, 02-Jan-06 at 3:04PM MST"; .a += "3h1m")' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 6:00AM GMT
+```
+
+## Date script with custom format
+You can embed full expressions in with_dtf if needed.
+
+Given a sample.yml file of:
+```yaml
+a: Saturday, 15-Dec-01 at 2:59AM GMT
+```
+then
+```bash
+yq 'with_dtf("Monday, 02-Jan-06 at 3:04PM MST"; .a = (.a + "3h1m" | tz("Australia/Perth")))' sample.yml
+```
+will output
+```yaml
+a: Saturday, 15-Dec-01 at 2:00PM AWST
+```
+

operators/delete.md

@@ -1,4 +1,7 @@
+# Delete
+
 Deletes matching entries in maps or arrays.
+
 ## Delete entry in map
 Given a sample.yml file of:
 ```yaml
@@ -7,7 +10,7 @@ b: dog
 ```
 then
 ```bash
-yq eval 'del(.b)' sample.yml
+yq 'del(.b)' sample.yml
 ```
 will output
 ```yaml
@@ -23,7 +26,7 @@ a:
 ```
 then
 ```bash
-yq eval 'del(.a.a1)' sample.yml
+yq 'del(.a.a1)' sample.yml
 ```
 will output
 ```yaml
@@ -40,7 +43,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'del(.[1])' sample.yml
+yq 'del(.[1])' sample.yml
 ```
 will output
 ```yaml
@@ -56,7 +59,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval 'del(.[0].a)' sample.yml
+yq 'del(.[0].a)' sample.yml
 ```
 will output
 ```yaml
@@ -71,7 +74,7 @@ b: dog
 ```
 then
 ```bash
-yq eval 'del(.c)' sample.yml
+yq 'del(.c)' sample.yml
 ```
 will output
 ```yaml
@@ -88,7 +91,7 @@ c: bat
 ```
 then
 ```bash
-yq eval 'del( .[] | select(. == "*at") )' sample.yml
+yq 'del( .[] | select(. == "*at") )' sample.yml
 ```
 will output
 ```yaml
@@ -106,7 +109,7 @@ a:
 ```
 then
 ```bash
-yq eval 'del(.. | select(has("name")).name)' sample.yml
+yq 'del(.. | select(has("name")).name)' sample.yml
 ```
 will output
 ```yaml

operators/divide.md

@@ -0,0 +1,61 @@
+# Divide
+
+Divide behaves differently according to the type of the LHS:
+* strings: split by the divider
+* number: arithmetic division
+
+## String split
+Given a sample.yml file of:
+```yaml
+a: cat_meow
+b: _
+```
+then
+```bash
+yq '.c = .a / .b' sample.yml
+```
+will output
+```yaml
+a: cat_meow
+b: _
+c:
+  - cat
+  - meow
+```
+
+## Number division
+The result during division is calculated as a float
+
+Given a sample.yml file of:
+```yaml
+a: 12
+b: 2.5
+```
+then
+```bash
+yq '.a = .a / .b' sample.yml
+```
+will output
+```yaml
+a: 4.8
+b: 2.5
+```
+
+## Number division by zero
+Dividing by zero results in +Inf or -Inf
+
+Given a sample.yml file of:
+```yaml
+a: 1
+b: -1
+```
+then
+```bash
+yq '.a = .a / 0 | .b = .b / 0' sample.yml
+```
+will output
+```yaml
+a: +Inf
+b: -Inf
+```
+

operators/document-index.md

@@ -1,4 +1,7 @@
+# Document Index
+
 Use the `documentIndex` operator (or the `di` shorthand) to select nodes of a particular document.
+
 ## Retrieve a document index
 Given a sample.yml file of:
 ```yaml
@@ -8,7 +11,7 @@ a: frog
 ```
 then
 ```bash
-yq eval '.a | documentIndex' sample.yml
+yq '.a | document_index' sample.yml
 ```
 will output
 ```yaml
@@ -26,7 +29,7 @@ a: frog
 ```
 then
 ```bash
-yq eval '.a | di' sample.yml
+yq '.a | di' sample.yml
 ```
 will output
 ```yaml
@@ -44,7 +47,7 @@ a: frog
 ```
 then
 ```bash
-yq eval 'select(documentIndex == 1)' sample.yml
+yq 'select(document_index == 1)' sample.yml
 ```
 will output
 ```yaml
@@ -60,7 +63,7 @@ a: frog
 ```
 then
 ```bash
-yq eval 'select(di == 1)' sample.yml
+yq 'select(di == 1)' sample.yml
 ```
 will output
 ```yaml
@@ -76,12 +79,13 @@ a: frog
 ```
 then
 ```bash
-yq eval '.a | ({"match": ., "doc": documentIndex})' sample.yml
+yq '.a | ({"match": ., "doc": document_index})' sample.yml
 ```
 will output
 ```yaml
 match: cat
 doc: 0
+---
 match: frog
 doc: 1
 ```

operators/encode-decode.md

@@ -0,0 +1,516 @@
+# 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 embedded yaml/json/props in them.
+
+
+| Format | Decode (from string) | Encode (to string) |
+| --- | -- | --|
+| Yaml | from_yaml/@yamld | to_yaml(i)/@yaml |
+| JSON | from_json/@jsond | to_json(i)/@json |
+| Properties | from_props/@propsd  | to_props/@props |
+| CSV | from_csv/@csvd | to_csv/@csv |
+| TSV | from_tsv/@tsvd | to_tsv/@tsv |
+| XML | from_xml/@xmld | to_xml(i)/@xml |
+| Base64 | @base64d | @base64 |
+| URI | @urid | @uri |
+| Shell |  | @sh |
+
+
+See CSV and TSV [documentation](https://mikefarah.gitbook.io/yq/usage/csv-tsv) for accepted formats.
+
+XML uses the `--xml-attribute-prefix` and `xml-content-name` flags to identify attributes and content fields.
+
+
+Base64 assumes [rfc4648](https://rfc-editor.org/rfc/rfc4648.html) encoding. Encoding and decoding both assume that the content is a utf-8 string and not binary content.
+
+## Encode value as json string
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq '.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 '.b = (.a | to_json(0))' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: '{"cool":"thing"}'
+```
+
+## Encode value as json string, on one line shorthand
+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 '.b = (.a | @json)' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: '{"cool":"thing"}'
+```
+
+## Decode a json encoded string
+Keep in mind JSON is a subset of YAML. If you want idiomatic yaml, pipe through the style operator to clear out the JSON styling.
+
+Given a sample.yml file of:
+```yaml
+a: '{"cool":"thing"}'
+```
+then
+```bash
+yq '.a | from_json | ... style=""' sample.yml
+```
+will output
+```yaml
+cool: thing
+```
+
+## Encode value as props string
+Given a sample.yml file of:
+```yaml
+a:
+  cool: thing
+```
+then
+```bash
+yq '.b = (.a | @props)' sample.yml
+```
+will output
+```yaml
+a:
+  cool: thing
+b: |
+  cool = thing
+```
+
+## Decode props encoded string
+Given a sample.yml file of:
+```yaml
+a: |-
+  cats=great
+  dogs=cool as well
+```
+then
+```bash
+yq '.a |= @propsd' sample.yml
+```
+will output
+```yaml
+a:
+  cats: great
+  dogs: cool as well
+```
+
+## Decode csv encoded string
+Given a sample.yml file of:
+```yaml
+a: |-
+  cats,dogs
+  great,cool as well
+```
+then
+```bash
+yq '.a |= @csvd' sample.yml
+```
+will output
+```yaml
+a:
+  - cats: great
+    dogs: cool as well
+```
+
+## Decode tsv encoded string
+Given a sample.yml file of:
+```yaml
+a: |-
+  cats	dogs
+  great	cool as well
+```
+then
+```bash
+yq '.a |= @tsvd' sample.yml
+```
+will output
+```yaml
+a:
+  - cats: great
+    dogs: cool as well
+```
+
+## Encode value as yaml string
+Indent defaults to 2
+
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    bob: dylan
+```
+then
+```bash
+yq '.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 '.b = (.a | to_yaml(8))' sample.yml
+```
+will output
+```yaml
+a:
+  cool:
+    bob: dylan
+b: |
+  cool:
+          bob: dylan
+```
+
+## Decode a yaml encoded string
+Given a sample.yml file of:
+```yaml
+a: 'foo: bar'
+```
+then
+```bash
+yq '.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 '.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 '.a |= (from_yaml | .foo = "cat" | to_yaml)' sample.yml
+```
+will output
+```yaml
+a: 'foo: cat'
+```
+
+## Encode array of scalars as csv string
+Scalars are strings, numbers and booleans.
+
+Given a sample.yml file of:
+```yaml
+- cat
+- thing1,thing2
+- true
+- 3.40
+```
+then
+```bash
+yq '@csv' sample.yml
+```
+will output
+```yaml
+cat,"thing1,thing2",true,3.40
+```
+
+## Encode array of arrays as csv string
+Given a sample.yml file of:
+```yaml
+- - cat
+  - thing1,thing2
+  - true
+  - 3.40
+- - dog
+  - thing3
+  - false
+  - 12
+```
+then
+```bash
+yq '@csv' sample.yml
+```
+will output
+```yaml
+cat,"thing1,thing2",true,3.40
+dog,thing3,false,12
+```
+
+## Encode array of arrays as tsv string
+Scalars are strings, numbers and booleans.
+
+Given a sample.yml file of:
+```yaml
+- - cat
+  - thing1,thing2
+  - true
+  - 3.40
+- - dog
+  - thing3
+  - false
+  - 12
+```
+then
+```bash
+yq '@tsv' sample.yml
+```
+will output
+```yaml
+cat	thing1,thing2	true	3.40
+dog	thing3	false	12
+```
+
+## Encode value as xml string
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    foo: bar
+    +@id: hi
+```
+then
+```bash
+yq '.a | to_xml' sample.yml
+```
+will output
+```yaml
+<cool id="hi">
+  <foo>bar</foo>
+</cool>
+
+```
+
+## Encode value as xml string on a single line
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    foo: bar
+    +@id: hi
+```
+then
+```bash
+yq '.a | @xml' sample.yml
+```
+will output
+```yaml
+<cool id="hi"><foo>bar</foo></cool>
+
+```
+
+## Encode value as xml string with custom indentation
+Given a sample.yml file of:
+```yaml
+a:
+  cool:
+    foo: bar
+    +@id: hi
+```
+then
+```bash
+yq '{"cat": .a | to_xml(1)}' sample.yml
+```
+will output
+```yaml
+cat: |
+  <cool id="hi">
+   <foo>bar</foo>
+  </cool>
+```
+
+## Decode a xml encoded string
+Given a sample.yml file of:
+```yaml
+a: <foo>bar</foo>
+```
+then
+```bash
+yq '.b = (.a | from_xml)' sample.yml
+```
+will output
+```yaml
+a: <foo>bar</foo>
+b:
+  foo: bar
+```
+
+## Encode a string to base64
+Given a sample.yml file of:
+```yaml
+coolData: a special string
+```
+then
+```bash
+yq '.coolData | @base64' sample.yml
+```
+will output
+```yaml
+YSBzcGVjaWFsIHN0cmluZw==
+```
+
+## Encode a yaml document to base64
+Pipe through @yaml first to convert to a string, then use @base64 to encode it.
+
+Given a sample.yml file of:
+```yaml
+a: apple
+```
+then
+```bash
+yq '@yaml | @base64' sample.yml
+```
+will output
+```yaml
+YTogYXBwbGUK
+```
+
+## Encode a string to uri
+Given a sample.yml file of:
+```yaml
+coolData: this has & special () characters *
+```
+then
+```bash
+yq '.coolData | @uri' sample.yml
+```
+will output
+```yaml
+this+has+%26+special+%28%29+characters+%2A
+```
+
+## Decode a URI to a string
+Given a sample.yml file of:
+```yaml
+this+has+%26+special+%28%29+characters+%2A
+```
+then
+```bash
+yq '@urid' sample.yml
+```
+will output
+```yaml
+this has & special () characters *
+```
+
+## Encode a string to sh
+Sh/Bash friendly string
+
+Given a sample.yml file of:
+```yaml
+coolData: strings with spaces and a 'quote'
+```
+then
+```bash
+yq '.coolData | @sh' sample.yml
+```
+will output
+```yaml
+strings' with spaces and a '\'quote\'
+```
+
+## Decode a base64 encoded string
+Decoded data is assumed to be a string.
+
+Given a sample.yml file of:
+```yaml
+coolData: V29ya3Mgd2l0aCBVVEYtMTYg8J+Yig==
+```
+then
+```bash
+yq '.coolData | @base64d' sample.yml
+```
+will output
+```yaml
+Works with UTF-16 😊
+```
+
+## Decode a base64 encoded yaml document
+Pipe through `from_yaml` to parse the decoded base64 string as a yaml document.
+
+Given a sample.yml file of:
+```yaml
+coolData: YTogYXBwbGUK
+```
+then
+```bash
+yq '.coolData |= (@base64d | from_yaml)' sample.yml
+```
+will output
+```yaml
+coolData:
+  a: apple
+```
+

operators/entries.md

@@ -0,0 +1,165 @@
+# Entries
+
+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.
+
+Use `with_entries(op)` as a syntactic sugar for doing `to_entries | op | from_entries`.
+
+## to_entries Map
+Given a sample.yml file of:
+```yaml
+a: 1
+b: 2
+```
+then
+```bash
+yq 'to_entries' sample.yml
+```
+will output
+```yaml
+- key: a
+  value: 1
+- key: b
+  value: 2
+```
+
+## to_entries Array
+Given a sample.yml file of:
+```yaml
+- a
+- b
+```
+then
+```bash
+yq 'to_entries' sample.yml
+```
+will output
+```yaml
+- key: 0
+  value: a
+- key: 1
+  value: b
+```
+
+## to_entries null
+Given a sample.yml file of:
+```yaml
+null
+```
+then
+```bash
+yq 'to_entries' sample.yml
+```
+will output
+```yaml
+```
+
+## from_entries map
+Given a sample.yml file of:
+```yaml
+a: 1
+b: 2
+```
+then
+```bash
+yq 'to_entries | from_entries' sample.yml
+```
+will output
+```yaml
+a: 1
+b: 2
+```
+
+## from_entries with numeric key indices
+from_entries always creates a map, even for numeric keys
+
+Given a sample.yml file of:
+```yaml
+- a
+- b
+```
+then
+```bash
+yq 'to_entries | from_entries' sample.yml
+```
+will output
+```yaml
+0: a
+1: b
+```
+
+## Use with_entries to update keys
+Given a sample.yml file of:
+```yaml
+a: 1
+b: 2
+```
+then
+```bash
+yq 'with_entries(.key |= "KEY_" + .)' sample.yml
+```
+will output
+```yaml
+KEY_a: 1
+KEY_b: 2
+```
+
+## Use with_entries to update keys recursively
+We use (.. | select(tag="map")) to find all the maps in the doc, then |= to update each one of those maps. In the update, with_entries is used.
+
+Given a sample.yml file of:
+```yaml
+a: 1
+b:
+  b_a: nested
+  b_b: thing
+```
+then
+```bash
+yq '(.. | select(tag=="!!map")) |= with_entries(.key |= "KEY_" + .)' sample.yml
+```
+will output
+```yaml
+KEY_a: 1
+KEY_b:
+  KEY_b_a: nested
+  KEY_b_b: thing
+```
+
+## Custom sort map keys
+Use to_entries to convert to an array of key/value pairs, sort the array using sort/sort_by/etc, and convert it back.
+
+Given a sample.yml file of:
+```yaml
+a: 1
+c: 3
+b: 2
+```
+then
+```bash
+yq 'to_entries | sort_by(.key) | reverse | from_entries' sample.yml
+```
+will output
+```yaml
+c: 3
+b: 2
+a: 1
+```
+
+## Use with_entries to filter the map
+Given a sample.yml file of:
+```yaml
+a:
+  b: bird
+c:
+  d: dog
+```
+then
+```bash
+yq 'with_entries(select(.value | has("b")))' sample.yml
+```
+will output
+```yaml
+a:
+  b: bird
+```
+

operators/env-variable-operators.md

@@ -0,0 +1,295 @@
+# Env Variable Operators
+
+These operators are used to handle environment variables usage in expressions and documents. 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. 
+
+There are three operators:
+
+-  `env` which takes a single environment variable name and parse the variable as a yaml node (be it a map, array, string, number of boolean) 
+- `strenv` which also takes a single environment variable name, and always parses the variable as a string.
+- `envsubst` which you pipe strings into and it interpolates environment variables in strings using [envsubst](https://github.com/a8m/envsubst). 
+
+
+## EnvSubst Options
+You can optionally pass envsubst any of the following options:
+
+  - nu: NoUnset, this will fail if there are any referenced variables that are not set
+  - ne: NoEmpty, this will fail if there are any referenced variables that are empty
+  - ff: FailFast, this will abort on the first failure (rather than collect all the errors)
+
+E.g:
+`envsubst(ne, ff)` will fail on the first empty variable.
+
+See [Imposing Restrictions](https://github.com/a8m/envsubst#imposing-restrictions) in the `envsubst` documentation for more information, and below for examples.
+
+## Tip
+To replace environment variables across all values in a document, `envsubst` can be used with the recursive descent operator
+as follows:
+
+```bash
+yq '(.. | select(tag == "!!str")) |= envsubst' file.yaml
+```
+
+## Disabling env operators
+If required, you can use the `--security-disable-env-ops` to disable env operations.
+
+
+## Read string environment variable
+Running
+```bash
+myenv="cat meow" yq --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: cat meow
+```
+
+## Read boolean environment variable
+Running
+```bash
+myenv="true" yq --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: true
+```
+
+## Read numeric environment variable
+Running
+```bash
+myenv="12" yq --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: 12
+```
+
+## Read yaml environment variable
+Running
+```bash
+myenv="{b: fish}" yq --null-input '.a = env(myenv)'
+```
+will output
+```yaml
+a: {b: fish}
+```
+
+## Read boolean environment variable as a string
+Running
+```bash
+myenv="true" yq --null-input '.a = strenv(myenv)'
+```
+will output
+```yaml
+a: "true"
+```
+
+## Read numeric environment variable as a string
+Running
+```bash
+myenv="12" yq --null-input '.a = strenv(myenv)'
+```
+will output
+```yaml
+a: "12"
+```
+
+## Dynamically update a path from an environment variable
+The env variable can be any valid yq expression.
+
+Given a sample.yml file of:
+```yaml
+a:
+  b:
+    - name: dog
+    - name: cat
+```
+then
+```bash
+pathEnv=".a.b[0].name"  valueEnv="moo" yq 'eval(strenv(pathEnv)) = strenv(valueEnv)' sample.yml
+```
+will output
+```yaml
+a:
+  b:
+    - name: moo
+    - name: cat
+```
+
+## Dynamic key lookup with environment variable
+Given a sample.yml file of:
+```yaml
+cat: meow
+dog: woof
+```
+then
+```bash
+myenv="cat" yq '.[env(myenv)]' sample.yml
+```
+will output
+```yaml
+meow
+```
+
+## Replace strings with envsubst
+Running
+```bash
+myenv="cat" yq --null-input '"the ${myenv} meows" | envsubst'
+```
+will output
+```yaml
+the cat meows
+```
+
+## Replace strings with envsubst, missing variables
+Running
+```bash
+yq --null-input '"the ${myenvnonexisting} meows" | envsubst'
+```
+will output
+```yaml
+the  meows
+```
+
+## Replace strings with envsubst(nu), missing variables
+(nu) not unset, will fail if there are unset (missing) variables
+
+Running
+```bash
+yq --null-input '"the ${myenvnonexisting} meows" | envsubst(nu)'
+```
+will output
+```bash
+Error: variable ${myenvnonexisting} not set
+```
+
+## Replace strings with envsubst(ne), missing variables
+(ne) not empty, only validates set variables
+
+Running
+```bash
+yq --null-input '"the ${myenvnonexisting} meows" | envsubst(ne)'
+```
+will output
+```yaml
+the  meows
+```
+
+## Replace strings with envsubst(ne), empty variable
+(ne) not empty, will fail if a references variable is empty
+
+Running
+```bash
+myenv="" yq --null-input '"the ${myenv} meows" | envsubst(ne)'
+```
+will output
+```bash
+Error: variable ${myenv} set but empty
+```
+
+## Replace strings with envsubst, missing variables with defaults
+Running
+```bash
+yq --null-input '"the ${myenvnonexisting-dog} meows" | envsubst'
+```
+will output
+```yaml
+the dog meows
+```
+
+## Replace strings with envsubst(nu), missing variables with defaults
+Having a default specified skips over the missing variable.
+
+Running
+```bash
+yq --null-input '"the ${myenvnonexisting-dog} meows" | envsubst(nu)'
+```
+will output
+```yaml
+the dog meows
+```
+
+## Replace strings with envsubst(ne), missing variables with defaults
+Fails, because the variable is explicitly set to blank.
+
+Running
+```bash
+myEmptyEnv="" yq --null-input '"the ${myEmptyEnv-dog} meows" | envsubst(ne)'
+```
+will output
+```bash
+Error: variable ${myEmptyEnv} set but empty
+```
+
+## Replace string environment variable in document
+Given a sample.yml file of:
+```yaml
+v: ${myenv}
+```
+then
+```bash
+myenv="cat meow" yq '.v |= envsubst' sample.yml
+```
+will output
+```yaml
+v: cat meow
+```
+
+## (Default) Return all envsubst errors
+By default, all errors are returned at once.
+
+Running
+```bash
+yq --null-input '"the ${notThere} ${alsoNotThere}" | envsubst(nu)'
+```
+will output
+```bash
+Error: variable ${notThere} not set
+variable ${alsoNotThere} not set
+```
+
+## Fail fast, return the first envsubst error (and abort)
+Running
+```bash
+yq --null-input '"the ${notThere} ${alsoNotThere}" | envsubst(nu,ff)'
+```
+will output
+```bash
+Error: variable ${notThere} not set
+```
+
+## env() operation fails when security is enabled
+Use `--security-disable-env-ops` to disable env operations for security.
+
+Running
+```bash
+yq --null-input 'env("MYENV")'
+```
+will output
+```bash
+Error: env operations have been disabled
+```
+
+## strenv() operation fails when security is enabled
+Use `--security-disable-env-ops` to disable env operations for security.
+
+Running
+```bash
+yq --null-input 'strenv("MYENV")'
+```
+will output
+```bash
+Error: env operations have been disabled
+```
+
+## envsubst() operation fails when security is enabled
+Use `--security-disable-env-ops` to disable env operations for security.
+
+Running
+```bash
+yq --null-input '"value: ${MYENV}" | envsubst'
+```
+will output
+```bash
+Error: env operations have been disabled
+```
+

operators/equals.md

@@ -1,4 +1,6 @@
-This is a boolean operator that will return ```true``` if the LHS is equal to the RHS and ``false`` otherwise.
+# Equals / Not Equals
+
+This is a boolean operator that will return `true` if the LHS is equal to the RHS and `false` otherwise.
 
 ```
 .a == .b
@@ -10,6 +12,14 @@ 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)
+
 
 ## Match string
 Given a sample.yml file of:
@@ -20,7 +30,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] | (. == "*at")' sample.yml
+yq '.[] | (. == "*at")' sample.yml
 ```
 will output
 ```yaml
@@ -38,7 +48,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] | (. != "*at")' sample.yml
+yq '.[] | (. != "*at")' sample.yml
 ```
 will output
 ```yaml
@@ -56,7 +66,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] | (. == 4)' sample.yml
+yq '.[] | (. == 4)' sample.yml
 ```
 will output
 ```yaml
@@ -65,7 +75,7 @@ true
 false
 ```
 
-## Dont match number
+## Don't match number
 Given a sample.yml file of:
 ```yaml
 - 3
@@ -74,7 +84,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] | (. != 4)' sample.yml
+yq '.[] | (. != 4)' sample.yml
 ```
 will output
 ```yaml
@@ -86,35 +96,35 @@ true
 ## Match nulls
 Running
 ```bash
-yq eval --null-input 'null == ~'
+yq --null-input 'null == ~'
 ```
 will output
 ```yaml
 true
 ```
 
-## Non exisitant key doesn't equal a value
+## Non existent key doesn't equal a value
 Given a sample.yml file of:
 ```yaml
 a: frog
 ```
 then
 ```bash
-yq eval 'select(.b != "thing")' sample.yml
+yq 'select(.b != "thing")' sample.yml
 ```
 will output
 ```yaml
 a: frog
 ```
 
-## Two non existant keys are equal
+## Two non existent keys are equal
 Given a sample.yml file of:
 ```yaml
 a: frog
 ```
 then
 ```bash
-yq eval 'select(.b == .c)' sample.yml
+yq 'select(.b == .c)' sample.yml
 ```
 will output
 ```yaml

operators/error.md

@@ -0,0 +1,50 @@
+# Error
+
+Use this operation to short-circuit expressions. Useful for validation.
+
+## Validate a particular value
+Given a sample.yml file of:
+```yaml
+a: hello
+```
+then
+```bash
+yq 'select(.a == "howdy") or error(".a [" + .a + "] is not howdy!")' sample.yml
+```
+will output
+```bash
+Error: .a [hello] is not howdy!
+```
+
+## Validate the environment variable is a number - invalid
+Running
+```bash
+numberOfCats="please" yq --null-input 'env(numberOfCats) | select(tag == "!!int") or error("numberOfCats is not a number :(")'
+```
+will output
+```bash
+Error: numberOfCats is not a number :(
+```
+
+## Validate the environment variable is a number - valid
+`with` can be a convenient way of encapsulating validation.
+
+Given a sample.yml file of:
+```yaml
+name: Bob
+favouriteAnimal: cat
+```
+then
+```bash
+numberOfCats="3" yq '
+	with(env(numberOfCats); select(tag == "!!int") or error("numberOfCats is not a number :(")) | 
+	.numPets = env(numberOfCats)
+' sample.yml
+```
+will output
+```yaml
+name: Bob
+favouriteAnimal: cat
+numPets: 3
+```
+

operators/eval.md

@@ -0,0 +1,48 @@
+# Eval
+
+Use `eval` to dynamically process an expression - for instance from an environment variable.
+
+`eval` takes a single argument, and evaluates that as a `yq` expression. Any valid expression can be used, be it a path `.a.b.c | select(. == "cat")`, or an update `.a.b.c = "gogo"`.
+
+Tip: This can be a useful way to parameterise complex scripts.
+
+## Dynamically evaluate a path
+Given a sample.yml file of:
+```yaml
+pathExp: .a.b[] | select(.name == "cat")
+a:
+  b:
+    - name: dog
+    - name: cat
+```
+then
+```bash
+yq 'eval(.pathExp)' sample.yml
+```
+will output
+```yaml
+name: cat
+```
+
+## Dynamically update a path from an environment variable
+The env variable can be any valid yq expression.
+
+Given a sample.yml file of:
+```yaml
+a:
+  b:
+    - name: dog
+    - name: cat
+```
+then
+```bash
+pathEnv=".a.b[0].name"  valueEnv="moo" yq 'eval(strenv(pathEnv)) = strenv(valueEnv)' sample.yml
+```
+will output
+```yaml
+a:
+  b:
+    - name: moo
+    - name: cat
+```
+

operators/file-operators.md

@@ -1,3 +1,5 @@
+# File Operators
+
 File operators are most often used with merge when needing to merge specific files together. Note that when doing this, you will need to use `eval-all` to ensure all yaml documents are loaded into memory before performing the merge (as opposed to `eval` which runs the expression once per document).
 
 Note that the `fileIndex` operator has a short alias of `fi`.
@@ -7,6 +9,7 @@ Note the use of eval-all to ensure all documents are loaded into memory.
 ```bash
 yq eval-all 'select(fi == 0) * select(filename == "file2.yaml")' file1.yaml file2.yaml
 ```
+
 ## Get filename
 Given a sample.yml file of:
 ```yaml
@@ -14,7 +17,7 @@ a: cat
 ```
 then
 ```bash
-yq eval 'filename' sample.yml
+yq 'filename' sample.yml
 ```
 will output
 ```yaml
@@ -28,7 +31,7 @@ a: cat
 ```
 then
 ```bash
-yq eval 'fileIndex' sample.yml
+yq 'file_index' sample.yml
 ```
 will output
 ```yaml
@@ -46,12 +49,11 @@ a: cat
 ```
 then
 ```bash
-yq eval-all 'fileIndex' sample.yml another.yml
+yq eval-all 'file_index' sample.yml another.yml
 ```
 will output
 ```yaml
 0
----
 1
 ```
 
@@ -62,7 +64,7 @@ a: cat
 ```
 then
 ```bash
-yq eval 'fi' sample.yml
+yq 'fi' sample.yml
 ```
 will output
 ```yaml

operators/filter.md

@@ -0,0 +1,42 @@
+# Filter
+
+Filters an array (or map values) by the expression given. Equivalent to doing `map(select(exp))`.
+
+
+## Filter array
+Given a sample.yml file of:
+```yaml
+- 1
+- 2
+- 3
+```
+then
+```bash
+yq 'filter(. < 3)' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+```
+
+## Filter map values
+Given a sample.yml file of:
+```yaml
+c:
+  things: cool
+  frog: yes
+d:
+  things: hot
+  frog: false
+```
+then
+```bash
+yq 'filter(.things == "cool")' sample.yml
+```
+will output
+```yaml
+- things: cool
+  frog: yes
+```
+

operators/first.md

@@ -0,0 +1,319 @@
+# First
+
+Returns the first matching element in an array, or first matching value in a map.
+
+Can be given an expression to match with, otherwise will just return the first.
+
+## First matching element from array
+Given a sample.yml file of:
+```yaml
+- a: banana
+- a: cat
+- a: apple
+```
+then
+```bash
+yq 'first(.a == "cat")' sample.yml
+```
+will output
+```yaml
+a: cat
+```
+
+## First matching element from array with multiple matches
+Given a sample.yml file of:
+```yaml
+- a: banana
+- a: cat
+  b: firstCat
+- a: apple
+- a: cat
+  b: secondCat
+```
+then
+```bash
+yq 'first(.a == "cat")' sample.yml
+```
+will output
+```yaml
+a: cat
+b: firstCat
+```
+
+## First matching element from array with numeric condition
+Given a sample.yml file of:
+```yaml
+- a: 10
+- a: 100
+- a: 1
+- a: 101
+```
+then
+```bash
+yq 'first(.a > 50)' sample.yml
+```
+will output
+```yaml
+a: 100
+```
+
+## First matching element from array with boolean condition
+Given a sample.yml file of:
+```yaml
+- a: false
+- a: true
+  b: firstTrue
+- a: false
+- a: true
+  b: secondTrue
+```
+then
+```bash
+yq 'first(.a == true)' sample.yml
+```
+will output
+```yaml
+a: true
+b: firstTrue
+```
+
+## First matching element from array with null values
+Given a sample.yml file of:
+```yaml
+- a: null
+- a: cat
+- a: apple
+```
+then
+```bash
+yq 'first(.a != null)' sample.yml
+```
+will output
+```yaml
+a: cat
+```
+
+## First matching element from array with complex condition
+Given a sample.yml file of:
+```yaml
+- a: dog
+  b: 7
+- a: cat
+  b: 3
+- a: apple
+  b: 5
+```
+then
+```bash
+yq 'first(.b > 4 and .b < 6)' sample.yml
+```
+will output
+```yaml
+a: apple
+b: 5
+```
+
+## First matching element from map
+Given a sample.yml file of:
+```yaml
+x:
+  a: banana
+y:
+  a: cat
+z:
+  a: apple
+```
+then
+```bash
+yq 'first(.a == "cat")' sample.yml
+```
+will output
+```yaml
+a: cat
+```
+
+## First matching element from map with numeric condition
+Given a sample.yml file of:
+```yaml
+x:
+  a: 10
+y:
+  a: 100
+z:
+  a: 101
+```
+then
+```bash
+yq 'first(.a > 50)' sample.yml
+```
+will output
+```yaml
+a: 100
+```
+
+## First matching element from nested structure
+Given a sample.yml file of:
+```yaml
+items:
+  - a: banana
+  - a: cat
+  - a: apple
+```
+then
+```bash
+yq '.items | first(.a == "cat")' sample.yml
+```
+will output
+```yaml
+a: cat
+```
+
+## First matching element with no matches
+Given a sample.yml file of:
+```yaml
+- a: banana
+- a: cat
+- a: apple
+```
+then
+```bash
+yq 'first(.a == "dog")' sample.yml
+```
+will output
+```yaml
+```
+
+## First matching element from empty array
+Given a sample.yml file of:
+```yaml
+[]
+```
+then
+```bash
+yq 'first(.a == "cat")' sample.yml
+```
+will output
+```yaml
+```
+
+## First matching element from scalar node
+Given a sample.yml file of:
+```yaml
+hello
+```
+then
+```bash
+yq 'first(. == "hello")' sample.yml
+```
+will output
+```yaml
+```
+
+## First matching element from null node
+Given a sample.yml file of:
+```yaml
+null
+```
+then
+```bash
+yq 'first(. == "hello")' sample.yml
+```
+will output
+```yaml
+```
+
+## First matching element with string condition
+Given a sample.yml file of:
+```yaml
+- a: banana
+- a: cat
+- a: apple
+```
+then
+```bash
+yq 'first(.a | test("^c"))' sample.yml
+```
+will output
+```yaml
+a: cat
+```
+
+## First matching element with length condition
+Given a sample.yml file of:
+```yaml
+- a: hi
+- a: hello
+- a: world
+```
+then
+```bash
+yq 'first(.a | length > 4)' sample.yml
+```
+will output
+```yaml
+a: hello
+```
+
+## First matching element from array of strings
+Given a sample.yml file of:
+```yaml
+- banana
+- cat
+- apple
+```
+then
+```bash
+yq 'first(. == "cat")' sample.yml
+```
+will output
+```yaml
+cat
+```
+
+## First matching element from array of numbers
+Given a sample.yml file of:
+```yaml
+- 10
+- 100
+- 1
+```
+then
+```bash
+yq 'first(. > 50)' sample.yml
+```
+will output
+```yaml
+100
+```
+
+## First element with no filter from array
+Given a sample.yml file of:
+```yaml
+- 10
+- 100
+- 1
+```
+then
+```bash
+yq 'first' sample.yml
+```
+will output
+```yaml
+10
+```
+
+## First element with no filter from array of maps
+Given a sample.yml file of:
+```yaml
+- a: 10
+- a: 100
+```
+then
+```bash
+yq 'first' sample.yml
+```
+will output
+```yaml
+a: 10
+```
+

operators/flatten.md

@@ -0,0 +1,71 @@
+# Flatten
+This recursively flattens arrays.
+
+## Flatten
+Recursively flattens all arrays
+
+Given a sample.yml file of:
+```yaml
+- 1
+- - 2
+- - - 3
+```
+then
+```bash
+yq 'flatten' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+- 3
+```
+
+## Flatten with depth of one
+Given a sample.yml file of:
+```yaml
+- 1
+- - 2
+- - - 3
+```
+then
+```bash
+yq 'flatten(1)' sample.yml
+```
+will output
+```yaml
+- 1
+- 2
+- - 3
+```
+
+## Flatten empty array
+Given a sample.yml file of:
+```yaml
+- []
+```
+then
+```bash
+yq 'flatten' sample.yml
+```
+will output
+```yaml
+[]
+```
+
+## Flatten array of objects
+Given a sample.yml file of:
+```yaml
+- foo: bar
+- - foo: baz
+```
+then
+```bash
+yq 'flatten' sample.yml
+```
+will output
+```yaml
+- foo: bar
+- foo: baz
+```
+