Managing custom actions

Learn how to create and manage your own actions, and customize actions shared by the GitHub community.

이 문서의 내용

Choosing a location for your action

If you're developing an action for other people to use, we recommend keeping the action in its own repository instead of bundling it with other application code. This allows you to version, track, and release the action just like any other software.

작업을 공개적으로 게시하지 않고 엔터프라이즈에서 작업을 공유하려면 내부 리포지토리에 작업을 저장한 다음, 엔터프라이즈 내 동일한 조직 또는 모든 조직이 소유한 다른 리포지토리의 GitHub Actions 워크플로에 액세스할 수 있도록 리포지토리를 구성하면 됩니다. 자세한 내용은 엔터프라이즈와 작업 및 워크플로 공유을(를) 참조하세요.

You can store the action's files in any location in your repository. If you plan to combine action, workflow, and application code in a single repository, we recommend storing actions in the .github directory. For example, .github/actions/action-a and .github/actions/action-b.

Ensuring compatibility with other platforms

Many people access GitHub at a domain other than GitHub.com, such as GHE.com or a custom domain for GitHub Enterprise Server.

To ensure that your action is compatible with other platforms, do not use any hard-coded references to API URLs such as https://api.github.com. Instead, you can:

  • Use environment variables (see Variables reference):

    • For the REST API, use the GITHUB_API_URL environment variable.
    • For GraphQL, use the GITHUB_GRAPHQL_URL environment variable.

  • Use a toolkit such as @actions/github, which can automatically set the correct URLs.

Using release management for actions

This section explains how you can use release management to distribute updates to your actions in a predictable way.

Good practices for release management

If you're developing an action for other people to use, we recommend using release management to control how you distribute updates. Users can expect an action's patch version to include necessary critical fixes and security patches, while still remaining compatible with their existing workflows. You should consider releasing a new major version whenever your changes affect compatibility.

Under this release management approach, users should not be referencing an action's default branch, as it's likely to contain the latest code and consequently might be unstable. Instead, you can recommend that your users specify a major version when using your action, and only direct them to a more specific version if they encounter issues.

To use a specific action version, users can configure their GitHub Actions workflow to target a tag, a commit's SHA, or a branch named for a release.

Using tags for release management

We recommend using tags for actions release management. Using this approach, your users can easily distinguish between major and minor versions:

  • Create and validate a release on a release branch (such as release/v1) before creating the release tag (for example, v1.0.2).
  • Create a release using semantic versioning. For more information, see 리포지토리에서 릴리스 관리.
  • Move the major version tag (such as v1, v2) to point to the Git ref of the current release. For more information, see Git basics - tagging.
  • Introduce a new major version tag (v2) for changes that will break existing workflows. For example, changing an action's inputs would be a breaking change.
  • Major versions can be initially released with a beta tag to indicate their status, for example, v2-beta. The -beta tag can then be removed when ready.

This example demonstrates how a user can reference a major release tag:

steps:
    - uses: actions/javascript-action@v1

This example demonstrates how a user can reference a specific patch release tag:

steps:
    - uses: actions/javascript-action@v1.0.1

Using branches for release management

If you prefer to use branch names for release management, this example demonstrates how to reference a named branch:

steps:
    - uses: actions/javascript-action@v1-beta

Using a commit's SHA for release management

Each Git commit receives a calculated SHA value, which is unique and immutable. Your action's users might prefer to rely on a commit's SHA value, as this approach can be more reliable than specifying a tag, which could be deleted or moved. However, this means that users will not receive further updates made to the action. You must use a commit's full SHA value, and not an abbreviated value.

steps:
    - uses: actions/javascript-action@a824008085750b8e136effc585c3cd6082bd575f

Creating a README file for your action

We recommend creating a README file to help people learn how to use your action. You can include this information in your README.md:

  • A detailed description of what the action does
  • Required input and output arguments
  • Optional input and output arguments
  • Secrets the action uses
  • Environment variables the action uses
  • An example of how to use your action in a workflow