Reference for GitHub Actions

A workflow is a configurable automated process made up of one or more jobs. You must create a YAML file to define your workflow configuration.

You can configure your workflows to run when specific activity on GitHub happens, at a scheduled time, or when an event outside of GitHub occurs.

You can use workflow commands when running shell commands in a workflow or in an action's code.

You can evaluate expressions in workflows and actions.

You can access context information in workflows and actions.

You can create actions to perform tasks in your repository. Actions require a metadata file that uses YAML syntax.

There are limits in GitHub Actions which you may hit as you scale up, some may be increased by contacting support.

When creating a Dockerfile for a Docker container action, you should be aware of how some Docker instructions interact with GitHub Actions and an action's metadata file.

The following processor architectures and operating systems are supported for the self-hosted runner application.

There are some limits on GitHub Actions usage when using self-hosted runners. These limits are subject to change.

GitHub Actions Importer has several supplemental arguments and settings to tailor the migration process to your needs.