Switch to contributor-friendly approach to size deltas CI report

.github/workflows/compile-examples.yml

@@ -53,24 +53,3 @@ jobs:
           if-no-files-found: error
           path: ${{ env.SKETCHES_REPORTS_PATH }}
           name: ${{ env.SKETCHES_REPORTS_ARTIFACT_NAME }}
-
-  report:
-    needs: compile-examples
-    # Only run the job when the workflow is triggered by a pull request from this repository (because arduino/report-size-deltas requires write permissions)
-    if: always() && github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - name: Download sketches reports artifact
-        id: download-artifact
-        continue-on-error: true # If compilation failed for all boards then there are no artifacts
-        uses: actions/download-artifact@v2
-        with:
-          name: ${{ env.SKETCHES_REPORTS_ARTIFACT_NAME }}
-          path: ${{ env.SKETCHES_REPORTS_PATH }}
-
-      - name: Comment size deltas report to PR
-        uses: arduino/report-size-deltas@v1
-        # If actions/download-artifact failed, there are no artifacts to report from.
-        if: steps.download-artifact.outcome == 'success'
-        with:
-          sketches-reports-source: ${{ env.SKETCHES_REPORTS_PATH }}

.github/workflows/report-size-deltas.yml

@@ -0,0 +1,24 @@
+name: Report Size Deltas
+
+# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/report-size-deltas.ya?ml"
+  schedule:
+    # Run at the minimum interval allowed by GitHub Actions.
+    # Note: GitHub Actions periodically has outages which result in workflow failures.
+    # In this event, the workflows will start passing again once the service recovers.
+    - cron: "*/5 * * * *"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Comment size deltas reports to PRs
+        uses: arduino/report-size-deltas@v1
+        with:
+          # The name of the workflow artifact created by the sketch compilation workflow
+          sketches-reports-source: sketches-reports