Retry CDN purge requests and warn on failure

.github/workflows/build-and-publish.yml

@@ -565,10 +565,36 @@ jobs:
       - name: Purge CDN cache
         run: |
           cd basic
-          for file in $(ls); do
-            curl -i "https://purge.jsdelivr.net/gh/${{ github.repository }}@basic/${file}"
+          failed_files=()
+          for file in *; do
+            [[ -f "$file" ]] || continue
+            purge_url="https://purge.jsdelivr.net/gh/${{ github.repository }}@basic/${file}"
+            purge_succeeded=false
+
+            for attempt in 1 2 3; do
+              echo "Purging ${file} from basic CDN cache (attempt ${attempt}/3)"
+              if curl --fail --show-error --silent --location --max-time 30 "$purge_url"; then
+                purge_succeeded=true
+                echo
+                break
+              fi
+
+              if [[ $attempt -lt 3 ]]; then
+                echo "Retrying ${file} after transient purge failure"
+                sleep 2
+              fi
+            done
+
+            if [[ $purge_succeeded == false ]]; then
+              failed_files+=("$file")
+              echo "::warning::Failed to purge jsDelivr cache for ${file} on the basic branch after 3 attempts."
+            fi
           done
 
+          if (( ${#failed_files[@]} > 0 )); then
+            printf 'Files with purge warnings on basic: %s\n' "${failed_files[*]}"
+          fi
+
   purge-universal-rulesets-cdn-cache:
     runs-on: ubuntu-latest
     needs: build-and-publish-universal-rulesets
@@ -583,6 +609,32 @@ jobs:
       - name: Purge CDN cache
         run: |
           cd universal
-          for file in $(ls); do
-            curl -i "https://purge.jsdelivr.net/gh/${{ github.repository }}@universal/${file}"
+          failed_files=()
+          for file in *; do
+            [[ -f "$file" ]] || continue
+            purge_url="https://purge.jsdelivr.net/gh/${{ github.repository }}@universal/${file}"
+            purge_succeeded=false
+
+            for attempt in 1 2 3; do
+              echo "Purging ${file} from universal CDN cache (attempt ${attempt}/3)"
+              if curl --fail --show-error --silent --location --max-time 30 "$purge_url"; then
+                purge_succeeded=true
+                echo
+                break
+              fi
+
+              if [[ $attempt -lt 3 ]]; then
+                echo "Retrying ${file} after transient purge failure"
+                sleep 2
+              fi
+            done
+
+            if [[ $purge_succeeded == false ]]; then
+              failed_files+=("$file")
+              echo "::warning::Failed to purge jsDelivr cache for ${file} on the universal branch after 3 attempts."
+            fi
           done
+
+          if (( ${#failed_files[@]} > 0 )); then
+            printf 'Files with purge warnings on universal: %s\n' "${failed_files[*]}"
+          fi