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Include common example for fetching PR base-ref #213

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Include common example for fetching PR base-ref #213

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Include common example for fetching PR base-ref
jasonkarns Apr 9, 2020
8d25b32
Remove extraneous newlines that snuck in
jasonkarns Apr 9, 2020
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10 changes: 10 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
@@ -117,6 +117,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
- [Checkout multiple repos (private)](#Checkout-multiple-repos-private)
- [Checkout pull request HEAD commit instead of merge commit](#Checkout-pull-request-HEAD-commit-instead-of-merge-commit)
- [Checkout pull request on closed event](#Checkout-pull-request-on-closed-event)
- [Fetch pull request base-ref in addition to merge commit (for diffing)](#Fetch-pull-request-base-ref-in-addition-to-merge-commit-for-diffing)
- [Fetch all tags](#Fetch-all-tags)
- [Fetch all branches](#Fetch-all-branches)
- [Fetch all history for all tags and branches](#Fetch-all-history-for-all-tags-and-branches)
@@ -207,6 +208,15 @@ jobs:
- uses: actions/checkout@v2
```

## Fetch pull request base-ref in addition to merge commit (for diffing)

```yml
- uses: actions/checkout@v2
- name: Fetch base_ref HEAD
run: git fetch --depth=1 origin +refs/heads/${{github.base_ref}}:refs/remotes/origin/${{github.base_ref}}
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@jasonkarns jasonkarns Apr 9, 2020 •
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I think this could actually be simplified to

git fetch --depth=1 origin +${{github.base_ref}}

or

git fetch --depth=1 origin +refs/heads/${{github.base_ref}}

since the destination is the conventional remote ref. But I'm unsure if there are any edge cases with that shortened form that users would encounter... (Then again, since this is supposed to be for "common scenarios", perhaps the short form is better?)

- run: git diff origin/${{github.base_ref}}..HEAD
```

## Fetch all tags

```yaml