ci(conventional-commit-check): run checks on being added to queue (#1152)

.github/workflows/conventional-commit-check.yml

@@ -8,9 +8,13 @@ on:
       - reopened
       - ready_for_review
 
+  merge_group:
+    types:
+      - checks_requested
+
 permissions:
   # Reference: https://github.com/cli/cli/issues/6274
-  repository-projects: read
+  repository-projects: write
   pull-requests: write
 
 env:
@@ -35,6 +39,7 @@ jobs:
 
       - uses: Swatinem/rust-cache@v2.2.0
         with:
+          key: "pr_title_check"
           cache-on-failure: "true"
 
       - name: Install cocogitto
@@ -43,13 +48,22 @@ jobs:
 
       - name: Verify PR title follows conventional commit standards
         id: pr_title_check
+        if: ${{ github.event_name == 'pull_request' }}
         shell: bash
         continue-on-error: true
         run: cog verify "${{ github.event.pull_request.title }}"
 
+      - name: Verify commit message follows conventional commit standards
+        id: commit_message_check
+        if: ${{ github.event_name == 'merge_group' }}
+        shell: bash
+        # Fail on error, we don't have context about PR information to update labels
+        continue-on-error: false
+        run: cog verify "${{ github.event.merge_group.head_commit.message }}"
+
         # GitHub CLI returns a successful error code even if the PR has the label already attached
       - name: Attach 'S-conventions-not-followed' label if PR title check failed
-        if: ${{ steps.pr_title_check.outcome == 'failure' }}
+        if: ${{ github.event_name == 'pull_request' && steps.pr_title_check.outcome == 'failure' }}
         shell: bash
         env:
           GH_TOKEN: ${{ github.token }}
@@ -60,7 +74,7 @@ jobs:
 
         # GitHub CLI returns a successful error code even if the PR does not have the label attached
       - name: Remove 'S-conventions-not-followed' label if PR title check succeeded
-        if: ${{ steps.pr_title_check.outcome == 'success' }}
+        if: ${{ github.event_name == 'pull_request' && steps.pr_title_check.outcome == 'success' }}
         shell: bash
         env:
           GH_TOKEN: ${{ github.token }}