checkout/README.md

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<p align="center">
<a href="https://github.com/actions/checkout"><img alt="GitHub Actions status" src="https://github.com/actions/checkout/workflows/test-local/badge.svg"></a>
</p>
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# Checkout V2 beta
This action checks-out your repository under `$GITHUB_WORKSPACE`, so your workflow can access it.
By default, the repository that triggered the workflow is checked-out, for the ref/SHA that triggered the event.
Refer [here](https://help.github.com/en/articles/events-that-trigger-workflows) to learn which commit `$GITHUB_SHA` points to for different events.
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# What's new
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- Improved fetch performance
- The default behavior now fetches only the SHA being checked-out
- Script authenticated git commands
- Persists `with.token` in the local git config
- Enables your scripts to run authenticated git commands
- Post-job cleanup removes the token
- Coming soon: Opt out by setting `with.persist-credentials` to `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
- `with.path` is always relative to `github.workspace`
- Aligns better with container actions, where `github.workspace` gets mapped in
- Removed input `submodules`
Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous versions.
# Usage
<!-- start usage -->
```yaml
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- uses: actions/checkout@v2-beta
with:
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# Repository name with owner. For example, actions/checkout
# Default: ${{ github.repository }}
repository: ''
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# 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: ''
# Access token for clone repository
# Default: ${{ github.token }}
token: ''
# 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: ''
```
<!-- end usage -->
## Checkout a different branch
```yaml
- uses: actions/checkout@v2-beta
with:
ref: some-branch
```
## Checkout a different, private repository
```yaml
- uses: actions/checkout@v2-beta
with:
repository: myAccount/myRepository
ref: refs/heads/master
token: ${{ secrets.GitHub_PAT }} # `GitHub_PAT` is a secret that contains your PAT
```
> - `${{ github.token }}` is scoped to the current repository, so if you want to checkout another repository that is private you will need to provide your own [PAT](https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line).
## Checkout the HEAD commit of a PR, rather than the merge commit
```yaml
- uses: actions/checkout@v2-beta
with:
ref: ${{ github.event.after }}
```
# License
The scripts and documentation in this project are released under the [MIT License](LICENSE)