From ce24e1092304e1fd0e8602f9a0c3e4e9d238875a Mon Sep 17 00:00:00 2001
From: sidey79 <7968127+sidey79@users.noreply.github.com>
Date: Sun, 21 Apr 2024 11:11:51 +0200
Subject: [PATCH] feat[build]: remove caches for merges pull requests

---
 .github/workflows/cacheCleanup.yml | 36 ++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 .github/workflows/cacheCleanup.yml

diff --git a/.github/workflows/cacheCleanup.yml b/.github/workflows/cacheCleanup.yml
new file mode 100644
index 00000000..7ad33ba3
--- /dev/null
+++ b/.github/workflows/cacheCleanup.yml
@@ -0,0 +1,36 @@
+name: cleanup caches by a branch / PR
+on:
+  pull_request:
+    types:
+      - closed
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    permissions:
+      # `actions:write` permission is required to delete caches
+      #   See also: https://docs.github.com/en/rest/actions/cache?apiVersion=2022-11-28#delete-a-github-actions-cache-for-a-repository-using-a-cache-id
+      actions: write
+      contents: read
+    steps:
+      - 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 )
+
+          ## 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
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}