ci: Rm merge queue cache in cache-cleanup.yml (#1129)

since they cannot be reused

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

.github/workflows/cache-cleanup.yml

@@ -15,14 +15,26 @@ jobs:
       - uses: actions/checkout@v3
       - name: Cleanup
         run: |
+          set -euxo pipefail
+
           gh extension install actions/gh-actions-cache
 
           export REPO="${{ github.repository }}"
 
+          # Setting this to not fail the workflow while deleting cache keys.
+          set +e
+
+          # Remove pull requests cache, since they cannot be reused
           gh pr list --state closed -L 20 --json number --jq '.[]|.number' | (
               while IFS='$\n' read -r closed_pr; do
                   BRANCH="refs/pull/${closed_pr}/merge" ./cleanup-cache.sh
               done
           )
+          # Remove merge queue cache, since they cannot be reused
+          gh actions-cache list -L 100 | cut -f 3 | grep 'gh-readonly-queue' | sort -u | (
+              while IFS='$\n' read -r branch; do
+                  BRANCH="$branch" ./cleanup-cache.sh
+              done
+          )
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

cleanup-cache.sh

@@ -7,14 +7,12 @@ BRANCH="${BRANCH?}"
 
 while true; do
     echo "Fetching list of cache key for $BRANCH"
-    cacheKeysForPR="$(gh actions-cache list -R "$REPO" -B "$BRANCH" -L 100 | cut -f 1 )"
+    cacheKeysForPR="$(gh actions-cache list -R "$REPO" -B "$BRANCH" -L 100 | cut -f 1)"
 
     if [ -z "$cacheKeysForPR" ]; then
         break
     fi
 
-    ## Setting this to not fail the workflow while deleting cache keys. 
-    set +e
     echo "Deleting caches..."
     for cacheKey in $cacheKeysForPR
     do