Merge PR ReactionMechanismGenerator#2505 and ReactionMechanismGenerat…

…or#2506 for github actions workflows.

Fixes up the github actions workflows for pull request regression
test summaries being added as comments to the pull request.
Trying to make it all more robust for other workflow triggers besides pull
requests.

.github/workflows/CI.yml

@@ -346,7 +346,9 @@ jobs:
           fi
 
       - name: Prepare Results for PR Comment
-        if : ${{ github.event_name == 'pull_request' }}
+        if: ${{ env.REFERENCE_JOB == 'false' }}
+        env:
+          PR_NUMBER: ${{ github.event.number || github.event.after || github.event_name }}
         run: |
           echo $PR_NUMBER > summary.txt
           echo "## Regression Testing Results" >> summary.txt

.github/workflows/annotate.yml

@@ -12,10 +12,12 @@ on:
     types:
       - completed
 
+run-name: Annotate PR ${{ github.event.workflow_run.event.display_title }}.
+
 jobs:
   on-success:
     runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request' }}
     steps:
       - run: echo 'The triggering workflow passed'
       - name: 'Download regression_summary artifact'
@@ -43,20 +45,19 @@ jobs:
         run: unzip regression_summary.zip
 
       - name: 'Get pull request number'
-        id: pr_number
         run: |
           echo "PR_NUMBER=$( head -n 1 summary.txt )" >> $GITHUB_ENV
           # remove the first line from the file
           sed -i '1d' summary.txt
+
       - name: Write summary to pull request as a comment
         uses: thollander/actions-comment-pull-request@v2
         with:
           filePath: summary.txt
           pr_number: ${{ env.PR_NUMBER }}
 
-  on-failure:
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
-    steps:
-      - run: echo 'The triggering workflow failed'
-
+      - name: Report the github.event.workflow_run as json
+        if: ${{ failure() }}
+        run: echo $JSON
+        env:
+          JSON: ${{ toJson(github.event.workflow_run) }}