check-dist.yml

# In TypeScript actions, `dist/` is a special directory. When you reference
# an action with the `uses:` property, `dist/index.js` is the code that will be
# run. For this project, the `dist/index.js` file is transpiled from other
# source files. This workflow ensures the `dist/` directory contains the
# expected transpiled code.
#
# If this workflow is run from a feature branch, it will act as an additional CI
# check and fail if the checked-in `dist/` directory does not match what is
# expected from the build.
name: Check Transpiled JavaScript

on:
  push:
  pull_request:
  merge_group:
  workflow_dispatch:

permissions:
  contents: read

jobs:
  check-dist:
    name: Check dist/
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - uses: pnpm/action-setup@v4

      - uses: actions/setup-node@v4.0.4
        with:
          node-version: 20.x
          cache: pnpm

      - run: pnpm install --frozen-lockfile

      - run: |
          pnpm run build && pnpm run package

      # This will fail the workflow if the PR wasn't created by Dependabot.
      - name: Compare Directories
        run: |
          if [[ "$(git diff --ignore-space-at-eol --text dist/ | wc -l)" -gt 0 ]]; then
            echo "Detected uncommitted changes after build. See status below:"
            git diff --text --ignore-space-at-eol dist/
            exit 1
          fi
        id: diff

      # If `dist/` was different than expected, and this was not a Dependabot
      # PR, upload the expected version as a workflow artifact.
      - uses: actions/upload-artifact@v4
        if: ${{ steps.diff.outcome == 'failure' }}
        with:
          name: dist
          path: dist/