Regenerating Screenshots

Regenerating Playwright Screenshot Expectations

Automates the process of triggering the PR: Update Playwright Expectations GitHub Action by creating a labeled PR from origin/main.

Steps

1. Fetch latest main

   git fetch origin main
   

2. Create a timestamped branch from origin/main

   Format: regen-screenshots/YYYY-MM-DDTHH (hour resolution, local time)

   git checkout -b regen-screenshots/<datetime> origin/main
   

3. Create an empty commit

   git commit --allow-empty -m "test: regenerate screenshot expectations"
   

4. Push the branch

   git push origin regen-screenshots/<datetime>
   

5. Generate a poem about regenerating screenshots. Be creative — a new, unique poem every time. Short (4–8 lines). Can be funny, wistful, epic, haiku-style, limerick, sonnet fragment — vary the form.

6. Create the PR with the poem as the body (no label yet).

   Write the poem to a temp file and use --body-file:

   # Write poem to temp file
   # Create PR:
   gh pr create \
     --base main \
     --head regen-screenshots/<datetime> \
     --title "test: regenerate screenshot expectations" \
     --body-file <temp-file>
   

7. Add the label as a separate step to trigger the GitHub Action.

   The labeled event only fires when a label is added after PR creation, not when applied during creation via --label.

   Use the GitHub API directly (gh pr edit --add-label fails due to deprecated Projects Classic GraphQL errors):

   gh api repos/{owner}/{repo}/issues/<pr-number>/labels \
     -f "labels[]=New Browser Test Expectations" --method POST
   

8. Report the result to the user:

   • PR URL
   • Branch name
   • Note that the GitHub Action will run automatically and commit updated screenshots to the branch.

Notes

• The New Browser Test Expectations label triggers the pr-update-playwright-expectations.yaml workflow.
• The workflow runs Playwright with --update-snapshots, commits results back to the PR branch, then removes the label.
• This is fire-and-forget — no need to wait for or monitor the Action.
• Always return to the original branch/worktree state after pushing.