yq/README.md

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# yq
[![Build Status](https://travis-ci.org/mikefarah/yq.svg?branch=master)](https://travis-ci.org/mikefarah/yq) ![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)
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a lightweight and portable command-line YAML processor
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The aim of the project is to be the [jq](https://github.com/stedolan/jq) or sed of yaml files.
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## Install
On MacOS:
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```
brew install yq
```
On Ubuntu and other Linux distros supporting `snap` packages:
```
snap install yq
```
On Ubuntu 16.04 or higher from Debian package:
```
sudo add-apt-repository ppa:rmescandon/yq
sudo apt update
sudo apt install yq -y
```
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or, [Download latest binary](https://github.com/mikefarah/yq/releases/latest) or alternatively:
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```
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go get gopkg.in/mikefarah/yq.v2
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```
## Run with Docker
Oneshot use:
```bash
docker run -v ${PWD}:/workdir mikefarah/yq yq [flags] <command> FILE...
```
Run commands interactively:
```bash
docker run -it -v ${PWD}:/workdir mikefarah/yq sh
```
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## Features
- Written in portable go, so you can download a lovely dependency free binary
- Deep read a yaml file with a given path
- Update a yaml file given a path
- Update a yaml file given a script file
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- Update creates any missing entries in the path on the fly
- Create a yaml file given a deep path and value
- Create a yaml file given a script file
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- Prefix a path to a yaml file
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- Convert from json to yaml
- Convert from yaml to json
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- Pipe data in by using '-'
- Merge multiple yaml files where each additional file sets values for missing or null value keys.
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- Merge multiple yaml files and override previous values.
- Merge multiple yaml files and append array values.
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- Supports multiple documents in a single yaml file
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## [Usage](http://mikefarah.github.io/yq/)
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Check out the [documentation](http://mikefarah.github.io/yq/) for more detailed and advanced usage.
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```
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Usage:
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yq [flags]
yq [command]
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Available Commands:
delete yq d [--inplace/-i] [--doc/-d index] sample.yaml a.b.c
help Help about any command
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merge yq m [--inplace/-i] [--doc/-d index] [--overwrite/-x] [--append/-a] sample.yaml sample2.yaml
new yq n [--script/-s script_file] a.b.c newValue
read yq r [--doc/-d index] sample.yaml a.b.c
write yq w [--inplace/-i] [--script/-s script_file] [--doc/-d index] sample.yaml a.b.c newValue
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prefix yq p [--inplace/-i] [--doc/-d index] sample.yaml a.b.c
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Flags:
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-h, --help help for yq
-t, --trim trim yaml output (default true)
-v, --verbose verbose mode
-V, --version Print version information and quit
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Use "yq [command] --help" for more information about a command.
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```
## Contribute
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1. `scripts/devtools.sh`
2. `make [local] vendor`
3. add unit tests
4. apply changes (use govendor with a preference to [gopkg](https://gopkg.in/) for package dependencies)
5. `make [local] build`
6. If required, update the user documentation
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- Update README.md and/or documentation under the mkdocs folder
- `make [local] build-docs`
- browse to docs/index.html and check your changes
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7. profit