yq

a lightweight and portable command-line YAML processor

The aim of the project is to be the jq or sed of yaml files.

Install

On MacOS:

brew install yq

On Ubuntu and other Linux distros supporting `snap` packages:

snap install yq

Snap notes

yq installs with with strict confinement in snap, this means it doesn't have direct access to root files. To read root files you can:

sudo cat /etc/myfile | yq -r - somecommand

And to write to a root file you can either use sponge:

sudo cat /etc/myfile | yq -r - somecommand | sudo sponge /etc/myfile

or write to a temporary file:

sudo cat /etc/myfile | yq -r - somecommand | sudo tee /etc/myfile.tmp
sudo mv /etc/myfile.tmp /etc/myfile
rm /etc/myfile.tmp

On Ubuntu 16.04 or higher from Debian package:

sudo add-apt-repository ppa:rmescandon/yq
sudo apt update
sudo apt install yq -y

or, Download latest binary or alternatively:

GO111MODULE=on go get github.com/mikefarah/yq/v3

Run with Docker

Oneshot use:

docker run --rm -v ${PWD}:/workdir mikefarah/yq yq [flags] <command> FILE...

Run commands interactively:

docker run --rm -it -v ${PWD}:/workdir mikefarah/yq sh

It can be useful to have a bash function to avoid typing the whole docker command:

yq() {
  docker run --rm -i -v ${PWD}:/workdir mikefarah/yq yq $@
}

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
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
Prefix a path to a yaml file
Convert from json to yaml
Convert from yaml to json
Pipe data in by using '-'
Merge multiple yaml files where each additional file sets values for missing or null value keys.
Merge multiple yaml files and override previous values.
Merge multiple yaml files and append array values.
Supports multiple documents in a single yaml file

Usage

Check out the documentation for more detailed and advanced usage.

yq is a lightweight and portable command-line YAML processor. It aims to be the jq or sed of yaml files.

Usage:
  yq [flags]
  yq [command]

Available Commands:
  delete      yq d [--inplace/-i] [--doc/-d index] sample.yaml a.b.c
  help        Help about any command
  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
  prefix      yq p [--inplace/-i] [--doc/-d index] sample.yaml a.b.c
  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

Flags:
  -h, --help      help for yq
  -t, --trim      trim yaml output (default true)
  -v, --verbose   verbose mode
  -V, --version   Print version information and quit

Use "yq [command] --help" for more information about a command.

Contribute

scripts/devtools.sh
make [local] vendor
add unit tests
apply changes to go.mod
make [local] build
If required, update the user documentation
- Update README.md and/or documentation under the mkdocs folder
- make [local] build-docs
- browse to docs/index.html and check your changes
profit

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yq