Delete stored cache on build:clean

Author: akhenry

.github/workflows/pr.yml

@@ -30,7 +30,9 @@ jobs:
     build_and_cache_dependencies_if_needed:
         needs: generate_cache_key
         runs-on: ubuntu-latest
-        container: mcr.microsoft.com/playwright:v1.57.0-jammy 
+        container: mcr.microsoft.com/playwright:v1.57.0-jammy
+        permissions:
+          actions: write
         steps:
           - uses: actions/checkout@v4
           - uses: actions/setup-node@v4
@@ -66,6 +68,20 @@ jobs:
                 } catch (error) {
                   core.warning(`Failed to remove ' + labelToRemove + ' label: ${error.message}`);
                 }
+          - name: Delete existing cache (to allow re-save on build:clean)
+            if: steps.node_deps_restore_cache.outputs.cache-hit == 'true' && contains(github.event.pull_request.labels.*.name, 'build:clean')
+            uses: actions/github-script@v6
+            with:
+              script: |
+                try {
+                  await github.rest.actions.deleteActionsCacheByKey({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    key: '${{ needs.generate_cache_key.outputs.cache_key }}'
+                  });
+                } catch (error) {
+                  core.warning(`Failed to delete cache: ${error.message}`);
+                }
           - uses: actions/cache/save@v4
             id: node_deps_save_cache
             if: steps.node_deps_restore_cache.outputs.cache-hit != 'true' || contains(github.event.pull_request.labels.*.name, 'build:clean')