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Add GitHub Actions workflow to clean up PR branch caches on close #931

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Add GitHub Actions workflow to clean up PR branch caches on close #931

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Initial plan
Copilot Mar 16, 2026
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Improve CleanupCaches workflow: use native gh cache commands, remove …
Copilot Mar 16, 2026
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16 changes: 7 additions & 9 deletions .github/workflows/CleanupCaches.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -4,29 +4,27 @@ on:
types:
- closed

permissions:
actions: write

jobs:
cleanup:
runs-on: ubuntu-latest
steps:
- name: Check out code
uses: actions/checkout@v6

- name: Cleanup
run: |
gh extension install actions/gh-actions-cache

REPO=${{ github.repository }}
BRANCH="refs/pull/${{ github.event.pull_request.number }}/merge"

echo "Fetching list of cache key"
cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1 )
echo "Fetching list of cache keys"
cacheKeysForPR=$(gh cache list -R $REPO --ref $BRANCH | cut -f 1)

## Setting this to not fail the workflow while deleting cache keys.
## Setting this to not fail the workflow while deleting cache keys.
set +e
echo "Deleting caches..."
for cacheKey in $cacheKeysForPR
do
gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
gh cache delete $cacheKey -R $REPO
done
echo "Done"
env:
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