ci: Fix commenting of bundle size (#9539)

PR number couldn't be retrieved properly before, so we were never
commenting. Move jobs to one file to mitigate it.

.github/workflows/comment-bundle-size.yaml

@@ -1,58 +0,0 @@
-name: Comment Bundle Size
-
-# Runs when Measure Bundle Size workflow completes.
-# This will run with full privileges.
-on:
-  workflow_run:
-    workflows: [Measure Bundle Size]
-    types: [completed]
-
-jobs:
-  comment:
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    steps:
-      - name: Download report artifact
-        uses: actions/download-artifact@v4
-        with:
-          name: bundle-report
-          path: artifact
-          run-id: ${{ github.event.workflow_run.id }}
-          github-token: ${{ secrets.SHAKA_BOT_TOKEN }}
-
-      - name: Add or Update PR Comment
-        shell: bash
-        env:
-          GITHUB_TOKEN: ${{ secrets.SHAKA_BOT_TOKEN }}
-          PR_NUMBER: ${{ github.event.workflow_run.pull_requests[0].number }}
-          COMMENT_INCLUDES: "Bundle Size Report"
-          COMMENT_USER: "shaka-bot"
-        run: |
-          if [ -z "$PR_NUMBER" ]; then
-            echo "No PR found."
-            exit 0
-          fi
-
-          MESSAGE=$(cat artifact/report.md)
-          echo "$MESSAGE"
-
-          # Find existing bot comment
-          jq_filter=".[] | select((.user.login == \"$COMMENT_USER\") and (.body | startswith(\"$COMMENT_INCLUDES\"))) | .id"
-
-          gh api \
-            /repos/${{ github.repository }}/issues/$PR_NUMBER/comments \
-            | jq "$jq_filter" > old-comment-id
-
-          if [[ -z "$(cat old-comment-id)" ]]; then
-            echo "Creating new bundle size comment"
-            gh api \
-              --method POST \
-              /repos/${{ github.repository }}/issues/$PR_NUMBER/comments \
-              -f "body=$MESSAGE"
-          else
-            echo "Updating existing bundle size comment"
-            gh api \
-              --method PATCH \
-              /repos/${{ github.repository }}/issues/comments/$(cat old-comment-id) \
-              -f "body=$MESSAGE"
-          fi

.github/workflows/measure-bundle-size.yaml

@@ -74,3 +74,45 @@ jobs:
           name: bundle-report
           path: report.md
           retention-days: 1
+
+  comment:
+    runs-on: ubuntu-latest
+    needs: bundle-size
+    steps:
+      - name: Download report artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: bundle-report
+          path: artifact
+
+      - name: Add or Update PR Comment
+        shell: bash
+        env:
+          GH_TOKEN: ${{ secrets.SHAKA_BOT_TOKEN }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          COMMENT_INCLUDES: "Bundle Size Report"
+          COMMENT_USER: "shaka-bot"
+        run: |
+          MESSAGE=$(cat artifact/report.md)
+          echo "$MESSAGE"
+
+          # Find existing bot comment
+          jq_filter=".[] | select((.user.login == \"$COMMENT_USER\") and (.body | startswith(\"$COMMENT_INCLUDES\"))) | .id"
+
+          gh api \
+            /repos/${{ github.repository }}/issues/$PR_NUMBER/comments \
+            | jq "$jq_filter" > old-comment-id
+
+          if [[ -z "$(cat old-comment-id)" ]]; then
+            echo "Creating new bundle size comment"
+            gh api \
+              --method POST \
+              /repos/${{ github.repository }}/issues/$PR_NUMBER/comments \
+              -f "body=$MESSAGE"
+          else
+            echo "Updating existing bundle size comment"
+            gh api \
+              --method PATCH \
+              /repos/${{ github.repository }}/issues/comments/$(cat old-comment-id) \
+              -f "body=$MESSAGE"
+          fi