Add merge_group support to builds workflow

.github/workflows/builds.yml

@@ -1,4 +1,4 @@
-name: Builds
+name: 🖥️ Builds
 
 on:
   push:
@@ -15,6 +15,13 @@ on:
       - 'LICENSE-EXCEPTIONS.md'
       - 'LICENSE.md'
       - 'README.md'
+  merge_group:
+    paths-ignore:
+      - '.vscode/**'
+      - 'docs/**'
+      - 'LICENSE-EXCEPTIONS.md'
+      - 'LICENSE.md'
+      - 'README.md'
 
 env:
   GODOT_BASE_DOWNLOAD_URL: https://github.com/godotengine/godot
@@ -45,9 +52,10 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          if [ "${{ github.event_name }}" == "pull_request" ]; then
+          git config diff.wsErrorHighlight all
+          if [ "${{ github.event_name }}" == "pull_request" -o "${{ github.event.forced }}" == "true" -o "${{ github.event.created }}" == "true" ]; then
             files=$(git diff-tree --no-commit-id --name-only -r HEAD^1..HEAD 2> /dev/null || true)
-          elif [ "${{ github.event_name }}" == "push" -a "${{ github.event.forced }}" == "false" -a "${{ github.event.created }}" == "false" ]; then
+          elif [ "${{ github.event_name }}" == "push" -a "${{ github.event.created }}" == "false" ]; then
             files=$(git diff-tree --no-commit-id --name-only -r ${{ github.event.before }}..${{ github.event.after }} 2> /dev/null || true)
           fi
           echo "$files" >> changed.txt

.github/workflows/cache_cleanup.yml

@@ -0,0 +1,32 @@
+# https://github.com/actions/cache/blob/main/tips-and-workarounds.md#force-deletion-of-caches-overriding-default-cache-eviction-policy
+name: 🧹 Cache Cleanup
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  cleanup:
+    name: Cleanup PR caches
+    runs-on: ubuntu-latest
+    permissions:
+      # `actions:write` permission is required to delete caches
+      actions: write
+      contents: read
+    steps:
+      - name: Cleanup
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge
+        run: |
+          echo "Fetching list of cache key"
+          cache_keys_for_pr=$(gh cache list --ref $BRANCH --limit 100 --json id --jq '.[].id')
+          # Setting this to not fail the workflow while deleting cache keys.
+          set +e
+          echo "Deleting caches..."
+          for cache_key in $cache_keys_for_pr; do
+            gh cache delete $cache_key
+            echo "Deleted: $cache_key"
+          done
+          echo "Done"