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# :octocat: :rocket: GitHub Environment Variables Action
[![GitHub Action: View on Marketplace](https://img.shields.io/badge/GitHub%20Action-View_on_Marketplace-28a745?logo=github)](https://github.com/marketplace/actions/github-environment-variables-action)
[![Demo: available](https://img.shields.io/badge/Demo-available-orange)](.github/workflows/demo.yml)
[![Version: v2.5.0](https://img.shields.io/badge/Version-v2.5.0-brightgreen)](https://github.com/FranzDiebold/github-env-vars-action/releases/tag/v2.5.0)
[![Lint and Test](https://github.com/FranzDiebold/github-env-vars-action/workflows/Lint%20and%20Test/badge.svg)](https://github.com/FranzDiebold/github-env-vars-action/actions?query=workflow%3A%22Lint+and+Test%22)
[![license: MIT](https://img.shields.io/badge/license-MIT-brightgreen.svg)](./LICENSE)
A [GitHub Action](https://github.com/features/actions) to expose useful environment variables.
### Environment Variables exposed by **this Action**
| Environment Variable Name | Description | Example value |
|--------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------|
| `CI_REPOSITORY_SLUG` | The slug of the owner and repository name (i.e. slug of `FranzDiebold/github-env-vars-action`). | `franzdiebold-github-env-vars-action` |
| `CI_REPOSITORY_OWNER` | The owner of the repository. | `FranzDiebold` |
| `CI_REPOSITORY_OWNER_SLUG` | The slug of the owner of the repository. | `franzdiebold` |
| `CI_REPOSITORY_NAME` | The name of the repository. | `github-env-vars-action` |
| `CI_REPOSITORY_NAME_SLUG` | The slug of the name of the repository. | `github-env-vars-action` |
| `CI_REPOSITORY` | The owner and repository name. Copy of `GITHUB_REPOSITORY` - for reasons of completeness. | `FranzDiebold/github-env-vars-action` |
| `CI_REF_SLUG` | The slug of the branch, tag or PR number *ref* that triggered the workflow (i.e. slug of `refs/heads/feat/feature-branch-1`). <br>If neither a branch, tag or PR number is available for the event type, the variable will not exist. | `refs-heads-feat-feature-branch-1` or<br> `refs-tags-v1-3-7` or<br> `refs-pull-42-merge` |
| `CI_ACTION_REF_NAME` | The branch or tag *name* that triggered the workflow. For pull requests it is the *head* branch name. | `feat/feature-branch-1` or<br> `v1.3.7` |
| `CI_ACTION_REF_NAME_SLUG` | The slug of the branch or tag *name* that triggered the workflow. For pull requests it is the slug of the *head* branch name. | `feat-feature-branch-1` or<br> `v1-3-7` |
| `CI_REF_NAME` | The branch *name*, tag *name* or PR number that triggered the workflow. <br>If neither a branch, tag or PR number is available for the event type, the variable will not exist. | `feat/feature-branch-1` or<br> `v1.3.7` or<br> `42/merge` |
| `CI_REF_NAME_SLUG` | The slug of the branch *name*, tag *name* or PR number that triggered the workflow. <br>If neither a branch, tag or PR number is available for the event type, the variable will not exist. | `feat-feature-branch-1` or<br> `v1-3-7` or<br> `42-merge` |
| `CI_REF` | The branch, tag or PR number *ref* that triggered the workflow. <br>If neither a branch, tag or PR number is available for the event type, the variable will not exist. Copy of `GITHUB_REF` - for reasons of completeness. | `refs/heads/feat/feature-branch-1` or<br> `refs/tags/v1.3.7` or<br> `refs/pull/42/merge` |
| `CI_HEAD_REF_SLUG` | The slug of the head branch *name*. <br>Only set for event type *pull request* or forked repositories. | `feat-feature-branch-1` |
| `CI_HEAD_REF` | Only set for forked repositories / pull request. The branch of the head repository / the head branch name. Copy of `GITHUB_HEAD_REF` - for reasons of completeness. | `feat/feature-branch-1` |
| `CI_BASE_REF_SLUG` | The slug of the base branch *name*. <br>Only set for event type *pull request* or forked repositories. | `main` |
| `CI_BASE_REF` | Only set for forked repositories / pull request. The branch of the base repository / the base branch name. Copy of `GITHUB_BASE_REF` - for reasons of completeness. | `main` |
| `CI_SHA_SHORT` | The shortened commit SHA (8 characters) that triggered the workflow. | `ffac537e` |
| `CI_SHA` | The commit SHA that triggered the workflow. Copy of `GITHUB_SHA` - for reasons of completeness. | `ffac537e6cbbf934b08745a378932722df287a53` |
| `CI_PR_SHA_SHORT` | The shortened latest commit SHA in the pull request's base branch. Short version of `CI_PR_SHA`. Only set for pull requests. | `010b249` |
| `CI_PR_SHA` | The latest commit SHA in the pull request's base branch. Long version of `CI_PR_SHA_SHORT`. Only set for pull requests. | `010b2491902d50e8623934f5bc43763ff5991642` |
| `CI_PR_NUMBER` | The number of the pull request. Only set for pull requests. | `42` |
| `CI_PR_ID` | Copy of `CI_PR_NUMBER` for completeness. | `42` |
| `CI_PR_TITLE` | The title of the pull request. Only set for pull requests. | `Add feature xyz.` |
| `CI_PR_DESCRIPTION` | The description of the pull request. Only set for pull requests. | `The feature xyz is the [...]` |
| `CI_ACTOR` | The name of the person or app that initiated the workflow. Copy of `GITHUB_ACTOR` - for reasons of completeness. | `octocat` |
| `CI_EVENT_NAME` | The name of the webhook event that triggered the workflow. Copy of `GITHUB_EVENT_NAME` - for reasons of completeness. | `push` or `pull_request` |
| `CI_RUN_ID` | A unique number for each run within a repository. This number does not change if you re-run the workflow run. Copy of `GITHUB_RUN_ID` - for reasons of completeness. | `397746731` |
| `CI_RUN_NUMBER` | A unique number for each run of a particular workflow in a repository. This number begins at 1 for the workflow's first run, and increments with each new run. This number does not change if you re-run the workflow run. Copy of `GITHUB_RUN_NUMBER` - for reasons of completeness. | `73` |
| `CI_WORKFLOW` | The name of the workflow. Copy of `GITHUB_WORKFLOW` - for reasons of completeness. | `Demo` |
| `CI_ACTION` | The unique identifier (`id`) of the action. Copy of `GITHUB_ACTION` - for reasons of completeness. | `run2` |
> The [slugified](https://en.wikipedia.org/wiki/Clean_URL#Slug) values are designed to be used in a URL.
### Default Environment Variables exposed by GitHub
For a full list of default environment variables exposed by GitHub see [https://docs.github.com/en/free-pro-team@latest/actions/reference/environment-variables#default-environment-variables](https://docs.github.com/en/free-pro-team@latest/actions/reference/environment-variables#default-environment-variables).
| Environment Variable Name | Description | Example value |
|---------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------|
| `GITHUB_ACTOR` | The name of the person or app that initiated the workflow. | `octocat` |
| `GITHUB_REPOSITORY` | The owner and repository name. | `FranzDiebold/github-env-vars-action` |
| `GITHUB_SHA` | The commit SHA that triggered the workflow. | `ffac537e6cbbf934b08745a378932722df287a53` |
| `GITHUB_REF` | The branch or tag ref that triggered the workflow. <br>If neither a branch or tag is available for the event type, the variable will not exist. | `refs/heads/feat/feature-branch-1` |
| `GITHUB_HEAD_REF` | Only set for forked repositories / pull request. The branch of the head repository / the head branch name. | `feat/feature-branch-1` |
| `GITHUB_BASE_REF` | Only set for forked repositories / pull request. The branch of the base repository / the base branch name. | `main` |
| `GITHUB_EVENT_NAME` | The name of the webhook event that triggered the workflow. | `push` |
| `GITHUB_RUN_ID` | A unique number for each run within a repository. This number does not change if you re-run the workflow run. | `397746731` |
| `GITHUB_RUN_NUMBER` | A unique number for each run of a particular workflow in a repository. This number begins at 1 for the workflow's first run, and increments with each new run. This number does not change if you re-run the workflow run. | `73` |
| `GITHUB_WORKFLOW` | The name of the workflow. | `Demo` |
| `GITHUB_ACTION` | The unique identifier (`id`) of the action. | `run2` |
## :rocket: Example usage
```yaml
steps:
- uses: FranzDiebold/github-env-vars-action@v2
- name: Print environment variables
run: |
echo "CI_REPOSITORY_SLUG=$CI_REPOSITORY_SLUG"
echo "CI_REPOSITORY_OWNER=$CI_REPOSITORY_OWNER"
echo "CI_REPOSITORY_OWNER_SLUG=$CI_REPOSITORY_OWNER_SLUG"
echo "CI_REPOSITORY_NAME=$CI_REPOSITORY_NAME"
echo "CI_REPOSITORY_NAME_SLUG=$CI_REPOSITORY_NAME_SLUG"
echo "CI_REPOSITORY=$CI_REPOSITORY"
echo "CI_REF_SLUG=$CI_REF_SLUG"
echo "CI_ACTION_REF_NAME=$CI_ACTION_REF_NAME"
echo "CI_ACTION_REF_NAME_SLUG=$CI_ACTION_REF_NAME_SLUG"
echo "CI_REF_NAME=$CI_REF_NAME"
echo "CI_REF_NAME_SLUG=$CI_REF_NAME_SLUG"
echo "CI_REF=$CI_REF"
echo "CI_HEAD_REF_SLUG=$CI_HEAD_REF_SLUG"
echo "CI_HEAD_REF=$CI_HEAD_REF"
echo "CI_BASE_REF_SLUG=$CI_BASE_REF_SLUG"
echo "CI_BASE_REF=$CI_BASE_REF"
echo "CI_SHA_SHORT=$CI_SHA_SHORT"
echo "CI_SHA=$CI_SHA"
echo "CI_PR_SHA_SHORT=$CI_PR_SHA_SHORT"
echo "CI_PR_SHA=$CI_PR_SHA"
echo "CI_PR_NUMBER=$CI_PR_NUMBER"
echo "CI_PR_ID=$CI_PR_ID"
echo "CI_PR_TITLE=$CI_PR_TITLE"
echo "CI_PR_DESCRIPTION=$CI_PR_DESCRIPTION"
echo "CI_ACTOR=$CI_ACTOR"
echo "CI_EVENT_NAME=$CI_EVENT_NAME"
echo "CI_RUN_ID=$CI_RUN_ID"
echo "CI_RUN_NUMBER=$CI_RUN_NUMBER"
echo "CI_WORKFLOW=$CI_WORKFLOW"
echo "CI_ACTION=$CI_ACTION"
```
### Demo
A demo for all Operating systems (Linux, macOS and Windows) is also available in the [demo workflows file of this repository](.github/workflows/demo.yml)!
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