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GitHub Actions status

Checkout V2

This action checks-out your repository under $GITHUB_WORKSPACE, so your workflow can access it.

By default, the repository that triggered the workflow is checked-out, for the ref/SHA that triggered the event.

Refer here to learn which commit $GITHUB_SHA points to for different events.

What's new

  • Improved fetch performance
    • The default behavior now fetches only the commit being checked-out
  • Script authenticated git commands
    • Persists the input token in the local git config
    • Enables your scripts to run authenticated git commands
    • Post-job cleanup removes the token
    • Opt out by setting the input persist-credentials: false
  • Creates a local branch
    • No longer detached HEAD when checking out a branch
    • A local branch is created with the corresponding upstream branch set
  • Improved layout
    • The input path is always relative to $GITHUB_WORKSPACE
    • Aligns better with container actions, where $GITHUB_WORKSPACE gets mapped in
  • Fallback to REST API download
    • When Git 2.18 or higher is not in the PATH, the REST API will be used to download the files
  • Removed input submodules

Refer here for previous versions.

Usage

- uses: actions/checkout@v2
  with:
    # Repository name with owner. For example, actions/checkout
    # Default: ${{ github.repository }}
    repository: ''

    # The branch, tag or SHA to checkout. When checking out the repository that
    # triggered a workflow, this defaults to the reference or SHA for that event.
    # Otherwise, defaults to `master`.
    ref: ''

    # Auth token used to fetch the repository. The token is stored in the local git
    # config, which enables your scripts to run authenticated git commands. The
    # post-job step removes the token from the git config.
    # Default: ${{ github.token }}
    token: ''

    # Whether to persist the token in the git config
    # Default: true
    persist-credentials: ''

    # Relative path under $GITHUB_WORKSPACE to place the repository
    path: ''

    # Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching
    # Default: true
    clean: ''

    # Number of commits to fetch. 0 indicates all history.
    # Default: 1
    fetch-depth: ''

    # Whether to download Git-LFS files
    # Default: false
    lfs: ''

Scenarios

Checkout a different branch

- uses: actions/checkout@v2
  with:
    ref: my-branch

Checkout HEAD^

- uses: actions/checkout@v2
  with:
    fetch-depth: 2
- run: git checkout HEAD^

Checkout multiple repos (side by side)

- name: Checkout
  uses: actions/checkout@v2
  with:
    path: main

- name: Checkout tools repo
  uses: actions/checkout@v2
  with:
    repository: my-org/my-tools
    path: my-tools

Checkout multiple repos (nested)

- name: Checkout
  uses: actions/checkout@v2

- name: Checkout tools repo
  uses: actions/checkout@v2
  with:
    repository: my-org/my-tools
    path: my-tools

Checkout multiple repos (private)

- name: Checkout
  uses: actions/checkout@v2
  with:
    path: main

- name: Checkout private tools
  uses: actions/checkout@v2
  with:
    repository: my-org/my-private-tools
    token: ${{ secrets.GitHub_PAT }} # `GitHub_PAT` is a secret that contains your PAT
    path: my-tools
  • ${{ github.token }} is scoped to the current repository, so if you want to checkout a different repository that is private you will need to provide your own PAT.

Checkout pull request HEAD commit instead of merge commit

- uses: actions/checkout@v2
  with:
    ref: ${{ github.event.pull_request.head.sha }}

Checkout pull request on closed event

on:
  pull_request:
    branches: [master]
    types: [opened, synchronize, closed]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

Checkout submodules

- uses: actions/checkout@v2
- name: Checkout submodules
  shell: bash
  run: |
    auth_header="$(git config --local --get http.https://github.com/.extraheader)"
    git submodule sync --recursive
    git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1    

Fetch all tags

- uses: actions/checkout@v2
- run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*

Fetch all branches

- uses: actions/checkout@v2
- run: |
    git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*    

Fetch all history for all tags and branches

- uses: actions/checkout@v2
- run: |
    git fetch --prune --unshallow    

License

The scripts and documentation in this project are released under the MIT License