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nektos act

Run your GitHub Actions locally 🚀

Stars

71,783

Popular Active

Forks

2,023

Watchers: 71,783

Language

Go

License: MIT License

Repository Radar Score

59 / 100

Growth

7d
+0
30d
+0
%
0.0%

Not enough metric snapshots yet to chart growth for this repository.

Score breakdown

  • popularity 86
  • growth 0
  • activity 75
  • freshness 100
  • community 84

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act-logo

Overview push Go Report Card awesome-runners

"Think globally, act locally"

Run your GitHub Actions locally! Why would you want to do this? Two reasons:

  • Fast Feedback - Rather than having to commit/push every time you want to test out the changes you are making to your .github/workflows/ files (or for any changes to embedded GitHub actions), you can use act to run the actions locally. The environment variables and filesystem are all configured to match what GitHub provides.
  • Local Task Runner - I love make. However, I also hate repeating myself. With act, you can use the GitHub Actions defined in your .github/workflows/ to replace your Makefile!

Tip

Now Manage and Run Act Directly From VS Code!
Check out the GitHub Local Actions Visual Studio Code extension which allows you to leverage the power of act to run and test workflows locally without leaving your editor.

How Does It Work?

When you run act it reads in your GitHub Actions from .github/workflows/ and determines the set of actions that need to be run. It uses the Docker API to either pull or build the necessary images, as defined in your workflow files and finally determines the execution path based on the dependencies that were defined. Once it has the execution path, it then uses the Docker API to run containers for each action based on the images prepared earlier. The environment variables and filesystem are all configured to match what GitHub provides.

Let's see it in action with a sample repo!

Demo

Act User Guide

Please look at the act user guide for more documentation.

Support

Need help? Ask in discussions!

Contributing

Want to contribute to act? Awesome! Check out the contributing guidelines to get involved.

Manually building from source

  • Install Go tools 1.20+ - (https://golang.org/doc/install)
  • Clone this repo git clone git@github.com:nektos/act.git
  • Run unit tests with make test
  • Build and install: make install

Created: Jan 2, 2019

Last push: Aug 9, 2026

Default branch: master

Latest release: v0.2.89

Languages

Share of the codebase by language, based on repository metadata from the host.

  • Go 81.5%
  • JavaScript 17.1%
  • Shell 1.1%
  • Makefile 0.3%

Repository Radar analysis

Deterministic insights derived from public metadata and our observations — not personal testing or reviews.

Why this repository is interesting

  • High absolute popularity (71,783 stars) signals broad adoption.

Who should use it

  • Developers working primarily with Go
  • Platform and DevOps engineers

Potential use cases

  • Reference or evaluate Go open-source approaches in this domain
  • Evaluate automation, CI/CD, or infrastructure patterns

Strengths

  • README present in our index
  • Declared license: MIT License
  • Substantial fork count (2,023) suggests reuse and contribution interest

Limitations / considerations

  • Insights are derived from public metadata and our observations — not a substitute for code review

What to watch

  • Re-check last push, issues, and releases on GitHub before production adoption

Strong signals: Strong community interest

Source: GitHub (public metadata) + Repository Radar analysis. We do not claim ownership of third-party repositories.

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