notify-package-changes.yml

name: Notify package changes

# Fires on PRs to dev that touch shared workspaces (packages, workspace,
# turbo.json, root package.json). Posts a single sticky comment listing the
# apps that depend on the changed code (discovered from apps/*/package.json),
# their owners (from CODEOWNERS entries, when active), and a dispatch link
# for the Deploy to Amplify workflow. The comment never triggers a deploy.
#
# The comment is "sticky" via marocchino/sticky-pull-request-comment with the
# header `package-deploy-impact`. Subsequent runs on the same PR update the
# same comment in place rather than stacking.
#
# pnpm-lock.yaml is deliberately excluded from the trigger paths.
#
# Markdown-only edits (READMEs etc.) under any watched path are excluded, so a
# docs-only change inside packages/ does not ping app owners.

on:
  pull_request:
    branches: [dev]
    paths:
      - "packages/**"
      - "pnpm-workspace.yaml"
      - "turbo.json"
      - "package.json"
      - "!**/*.md"
      - "!**/*.mdx"

permissions:
  contents: read
  pull-requests: write

jobs:
  notify:
    name: Compute and post sticky comment
    runs-on: ubuntu-latest
    steps:
      # Ubuntu runners ship with Node already, and the script only uses Node
      # built-ins. We deliberately do NOT use actions/setup-node here because
      # its Corepack auto-detection trips over the root package.json's
      # `packageManager: pnpm@<v>` field with `Unable to locate executable
      # file: pnpm`. The script needs no pnpm.
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Compute affected apps and render comment
        id: compute
        env:
          BASE_SHA: ${{ github.event.pull_request.base.sha }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
          GITHUB_REPOSITORY: ${{ github.repository }}
        run: node .github/scripts/compute-affected-apps.mjs

      - uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: package-deploy-impact
          message: ${{ steps.compute.outputs.markdown }}