Factor out commit title and body.

.github/workflows/update-dependencies.yml

@@ -85,9 +85,13 @@ jobs:
  run: |
  if ! git update-index --refresh; then
  date_str=$(date "+%a %b %d %Y")
+ commit_title="Update ${CHOSEN_DEPS} dependencies - ${date_str}"
+ commit_body="Automatically updated by [workflow]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID).")
  git config user.email "firebase-workflow-trigger-bot@google.com"
  git config user.name "firebase-workflow-trigger-bot"
- git commit -a -m "Update ${CHOSEN_DEPS} dependencies - ${date_str}"
+ git commit -a -m "${commit_title}
+
+ ${commit_body}"
  echo "::set-output name=branch_pushed::1"
  # Show changes in git log
  git diff
@@ -96,7 +100,7 @@ jobs:
  # Check out the original ref again so we have access to scripts.
  git checkout ${{ github.sha }} || true
  # Create pull request
- pr_number=$(python scripts/gha/create_pull_request.py --token ${{ steps.generate-token.outputs.token }} --head "${NEW_BRANCH}" --base "${{ github.event.inputs.baseBranch }}" --title "Update ${CHOSEN_DEPS} dependencies - ${date_str}" --body "Automatically updated by [workflow]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID).")
+ pr_number=$(python scripts/gha/create_pull_request.py --token ${{ steps.generate-token.outputs.token }} --head "${NEW_BRANCH}" --base "${{ github.event.inputs.baseBranch }}" --title "${commit_title}" --body "${commit_body}"
  echo "::set-output name=created_pr_number::${pr_number}"
  else
  echo "::warning ::No changes detected, won't create pull request."