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Sep 22, 2020

dasel

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Dasel (short for data-selector) allows you to query and modify data structures using selector strings.

Comparable to jq / yq, but supports JSON, YAML, TOML, XML and CSV with zero runtime dependencies.

One tool to rule them all

Say good bye to learning new tools just to work with a different data format.

Dasel uses a standard selector syntax no matter the data format. This means that once you learn how to use dasel you immediately have the ability to query/modify any of the supported data types without any additional tools or effort.

Update Kubernetes Manifest

Table of contents

Quickstart

Dasel is available on homebrew, ASDF, scoop, docker or as compiled binaries from the latest release.

brew install dasel

You can also install a development version with:

go install github.com/tomwright/dasel/cmd/dasel@master

For more information see the installation documentation.

Select

echo '{"name": "Tom"}' | dasel -r json '.name'
"Tom"

See select documentation.

Convert json to yaml

echo '{"name": "Tom"}' | dasel -r json -w yaml
name: Tom

See select documentation.

Put

echo '{"name": "Tom"}' | dasel put string -r json '.email' 'contact@tomwright.me'
{
  "email": "contact@tomwright.me",
  "name": "Tom"
}

See put documentation.

Delete

echo '{
  "email": "contact@tomwright.me",
  "name": "Tom"
}' | dasel delete -r json '.email' 'contact@tomwright.me'
{
  "name": "Tom"
}

See delete documentation.

Issue vs Discussion

I have enabled discussions on this repository.

I am aware there may be some confusion when deciding where you should communicate when reporting issues, asking questions or raising feature requests so this section aims to help us align on that.

Please raise an issue if:

  • You find a bug.
  • You have a feature request and can clearly describe your request.

Please open a discussion if:

  • You have a question.
  • You're not sure how to achieve something with dasel.
  • You have an idea but don't quite know how you would like it to work.
  • You have achieved something cool with dasel and want to show it off.
  • Anything else!

Features

Documentation

The official dasel docs can be found at daseldocs.tomwright.me.

Playground

You can test out dasel commands using the playground.

Source code for the playground can be found at github.com/TomWright/daselplayground.

Benchmarks

In my tests dasel has been up to 3x faster than jq and 15x faster than yq.

See the benchmark directory.