release-downloader/.github/workflows/check-dist.yml

name: Update dist

on:
  workflow_run:
    workflows:
      - Build and Test
    types:
      - completed
    branches:
      - main

permissions:
  contents: read

concurrency:
  group: update-dist-main
  cancel-in-progress: false

jobs:
  publish-dist:
    if: >-
      ${{
        github.event.workflow_run.conclusion == 'success' &&
        github.event.workflow_run.event == 'push'
      }}
    name: Publish dist
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout main
        uses: actions/checkout@v6
        with:
          ref: main
          fetch-depth: 0

      - name: Ensure main is still at the validated commit
        id: tip-check
        shell: bash
        run: |
          current_head="$(git rev-parse HEAD)"
          validated_head="${{ github.event.workflow_run.head_sha }}"

          if [ "$current_head" = "$validated_head" ]; then
            echo "publish=true" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "publish=false" >> "$GITHUB_OUTPUT"
          echo "main moved from $validated_head to $current_head; a newer successful Build and Test run will refresh dist."

      - name: Setup Node.js
        if: steps.tip-check.outputs.publish == 'true'
        uses: actions/setup-node@v6
        with:
          node-version-file: '.node-version'
          cache: npm

      - name: Install dependencies
        if: steps.tip-check.outputs.publish == 'true'
        run: npm ci

      - name: Build dist
        if: steps.tip-check.outputs.publish == 'true'
        run: npm run package

      - name: Detect dist changes
        if: steps.tip-check.outputs.publish == 'true'
        id: dist-status
        shell: bash
        run: |
          if ! git diff --quiet -- dist/ || \
            [ -n "$(git ls-files --others --exclude-standard -- dist/)" ]; then
            echo "changed=true" >> "$GITHUB_OUTPUT"
            git --no-pager status --short -- dist/
            exit 0
          fi

          echo "changed=false" >> "$GITHUB_OUTPUT"

      - name: Commit refreshed dist
        if: steps.dist-status.outputs.changed == 'true'
        shell: bash
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add dist/
          git commit -m "chore: refresh dist [skip ci]"
          git push origin HEAD:main