# Inspired by @action/checkout
#
# Compares the checked in `dist/index.js` with the PR's `dist/index.js`
# On mismatch this action fails
name: Verify dist

on:
  push:
    branches:
      - master
      - release/**
    paths-ignore:
      - "**.md"
  pull_request:
    paths-ignore:
      - "**.md"

jobs:
  check-dist:
    name: Verify dist/index.js file

    runs-on: ubuntu-latest
    permissions:
      contents: read

    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
        with:
          fetch-depth: 0

      - name: Use volta
        uses: volta-cli/action@5c175f92dea6f48441c436471e6479dbc192e194 # v4

      - name: Install dependencies
        run: yarn install

      - name: Rebuild dist
        run: yarn build

      - name: Compare expected and actual dist
        run: |
          if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
            echo 'Detected uncommitted changes after build. Did you forget to commit dist/?'
            echo "Diff:"
            git diff dist/
            exit 1
          fi
          # ncc emits code-split chunks (e.g. dist/319.index.js) next to index.js
          # whenever a dependency uses a dynamic import. A new chunk shows up as an
          # untracked file, which `git diff` does not report, so check for it too.
          untracked="$(git ls-files --others --exclude-standard dist/)"
          if [ -n "$untracked" ]; then
            echo 'Detected untracked files in dist/ after build. Did you forget to commit them?'
            echo "$untracked"
            exit 1
          fi