Add comment to workflow url in PR if a new kernel is available (#42)

Author: fwilhe

.github/workflows/pr-if-new-kernel.yml

@@ -1,7 +1,7 @@
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 0 * * *'
+    - cron: '0 5 * * *'
 jobs:
   update:
     runs-on: ubuntu-latest
@@ -28,8 +28,12 @@ jobs:
             git config --global user.email "gardenlinux@users.noreply.github.com"
             git commit -am 'Update kernel ${{ steps.update.outputs.has-update }}'
             git push --set-upstream origin update-kernel
-            gh pr create --base main --head update-kernel --title 'Update kernel ${{ steps.update.outputs.has-update }}' --body "automated update" --reviewer fwilhe
+            UPDATE_PR_LINK=$(gh pr create --base main --head update-kernel --title 'Update kernel ${{ steps.update.outputs.has-update }}' --body "automated update" --reviewer fwilhe)
+            # We have to trigger our own workflow run because github does not do that when the pr is created by automation
+            # This also means that we don't have the nice UI integration of test runs, so we add a comment to the workflow url for tracing purposes
             gh workflow run "build.yml" --ref "update-kernel"
+            RUN_URL=$(gh run list --workflow=build.yml --limit=1 --json=url --jq='.[0].url')
+            gh pr comment $UPDATE_PR_LINK --body "CI workflow created: $RUN_URL"
           fi
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}