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Publishing Actions in GitHub Actions

1. Introduction

In GitHub Actions, actions are reusable units of code that can be combined to create workflows. Publishing actions allows developers to share their custom actions with the community or use them across multiple repositories.

2. Key Concepts

  • **Actions**: Standalone pieces of code that can be run in workflows.
  • **Workflows**: Automated processes defined in YAML files that describe how to run one or more actions.
  • **Marketplace**: A platform where users can discover and use actions created by others.

3. Publishing Actions

To publish an action, you'll need to follow these steps:

  1. **Create a new GitHub repository** for your action. Use a descriptive name.
  2. **Add your action's code** in a folder named action.yml or Dockerfile.
  3. **Tag your release** in the repository to specify a version (e.g., v1.0.0).
  4. **Publish your action** by providing the repository URL when sharing.
Note: Ensure that your action includes a proper README file that explains how to use it.

Example: Creating a Simple Action


        name: 'Hello World'
        description: 'A simple hello world action'
        inputs:
          name:
            description: 'Who to greet'
            required: true
            default: 'World'
        runs:
          using: 'node12'
          steps:
            - run: echo "Hello ${{ inputs.name }}"
        

4. Best Practices

  • Document your action with a clear README.
  • Use version tags to manage different versions of your action.
  • Test your action thoroughly before publishing.
  • Maintain your action by addressing issues and feature requests promptly.

5. FAQ

What is the GitHub Actions Marketplace?

The GitHub Actions Marketplace is a platform where you can find, share, and discover actions created by the community.

How can I update my published action?

To update your action, make changes to your code and create a new release with a new version tag.

Can I use actions from the Marketplace in private repositories?

Yes, you can use public actions in private repositories. However, for private actions, you'll need to ensure that they are accessible to the repository.