super_diff.yml

name: SuperDiff
on:
  push:
    branches:
      - main
      - ci-*
  pull_request:
    types:
      - opened
      - closed
      - reopened
      - synchronize
concurrency:
  group: build-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true
jobs:
  analyze:
    runs-on: ubuntu-latest
    if: ${{ github.event_name == 'push' || github.event.action != 'closed' }}
    steps:
      - uses: actions/checkout@v4
      - name: Download actionlint
        id: download-actionlint
        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/7fdc9630cc360ea1a469eed64ac6d78caeda1234/scripts/download-actionlint.bash) 1.6.23
        shell: bash
      - name: Check workflow files
        run: ${{ steps.download-actionlint.outputs.executable }} -color
        shell: bash
      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          bundler-cache: true
      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version-file: ".nvmrc"
          cache: "yarn"
      - name: Install Yarn dependencies
        run: yarn --immutable
      - name: Lint
        run: yarn lint
      - name: Audit
        run: yarn audit

  test:
    needs:
      - analyze
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        ruby:
          - "3.0"
          - "3.1"
          - "3.2"
          - "3.3"
        rails_appraisal:
          - rails_6_1
          - rails_7_0
          - no_rails
        rspec_appraisal:
          - rspec_lt_3_10
          - rspec_gte_3_10
    env:
      BUNDLE_GEMFILE: gemfiles/${{ matrix.rails_appraisal }}_${{ matrix.rspec_appraisal }}.gemfile
    steps:
      - uses: actions/checkout@v4
      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: ${{ matrix.ruby }}
          bundler-cache: true
      - name: Install Zeus
        run: gem install zeus
      - name: Start Zeus
        uses: JarvusInnovations/background-action@v1
        with:
          run: zeus start
          wait-on: |
            socket:.zeus.sock
            file:.zeus.sock
          wait-for: 15s
          log-output-if: failure
      - name: Run tests
        run: bundle exec rake --trace

  ready-to-merge:
    runs-on: ubuntu-latest
    needs:
      - analyze
      - test
    steps:
      - run: echo "Analysis and tests passed. Ready to merge."

  collect-release-info:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          bundler-cache: true
      - name: Run command
        id: command
        run: scripts/collect-release-info.rb
    outputs:
      IS_NEW_RELEASE: ${{ steps.command.outputs.IS_NEW_RELEASE }}
      RELEASE_VERSION: ${{ steps.command.outputs.RELEASE_VERSION }}

  collect-docsite-release-info:
    runs-on: ubuntu-latest
    needs:
      - collect-release-info
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Run command
        id: command
        run: |
          set -x

          if [[ "$GITHUB_EVENT_NAME" == "push" && "$GITHUB_REF_NAME" == "main" && "$IS_NEW_RELEASE" == "true" ]]; then
            DOCSITE_RELEASE_VERSION="$RELEASE_VERSION"
            DOCSITE_DESTINATION_PATH="releases/$RELEASE_VERSION"
            HAS_DOCS_CHANGES_TO_RELEASE="true"
          else
            DOCSITE_RELEASE_VERSION="$COMMIT_ID"
            DOCSITE_DESTINATION_PATH="branches/$BRANCH_NAME/$COMMIT_ID"
            # Check if there any changes to docs/
            if git diff --quiet --merge-base "origin/$GITHUB_BASE_REF" -- docs; then
              HAS_DOCS_CHANGES_TO_RELEASE="false"
            else
              HAS_DOCS_CHANGES_TO_RELEASE="true"
            fi
          fi

          {
            echo "DOCSITE_RELEASE_VERSION=$DOCSITE_RELEASE_VERSION"
            echo "DOCSITE_DESTINATION_PATH=$DOCSITE_DESTINATION_PATH"
            echo "HAS_DOCS_CHANGES_TO_RELEASE=$HAS_DOCS_CHANGES_TO_RELEASE"
          } >> "$GITHUB_OUTPUT"
        env:
          IS_NEW_RELEASE: ${{ needs.collect-release-info.outputs.IS_NEW_RELEASE }}
          RELEASE_VERSION: ${{ needs.collect-release-info.outputs.RELEASE_VERSION }}
          BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
          COMMIT_ID: ${{ github.event.pull_request.head.sha }}
    outputs:
      DOCSITE_RELEASE_VERSION: ${{ steps.command.outputs.DOCSITE_RELEASE_VERSION }}
      DOCSITE_DESTINATION_PATH: ${{ steps.command.outputs.DOCSITE_DESTINATION_PATH }}
      HAS_DOCS_CHANGES_TO_RELEASE: ${{ steps.command.outputs.HAS_DOCS_CHANGES_TO_RELEASE }}

  build-docsite:
    runs-on: ubuntu-latest
    needs:
      - analyze
      - collect-release-info
      - collect-docsite-release-info
    if: ${{ needs.collect-docsite-release-info.outputs.HAS_DOCS_CHANGES_TO_RELEASE == 'true' }}
    steps:
      - uses: actions/checkout@v4
      - name: Install poetry
        run: pipx install poetry
      - name: Set up Python
        uses: actions/setup-python@v5
      - name: Install Python dependencies
        run: poetry install
      - name: Build docsite
        run: poetry run mkdocs build
      - name: Save site/ for later jobs
        uses: actions/cache/save@v4
        with:
          path: site
          key: docsite-${{ github.sha }}

  publish-docsite:
    runs-on: ubuntu-latest
    needs:
      - collect-release-info
      - collect-docsite-release-info
      # This already runs if there are docs changes to publish, so we don't need
      # to check that here
      - build-docsite
    steps:
      - uses: actions/checkout@v4
        with:
          ref: gh-pages
      - name: Restore cache from previous job
        uses: actions/cache/restore@v4
        with:
          path: site
          key: docsite-${{ github.sha }}
      - name: Update redirect in index (for a release)
        if: ${{ needs.collect-release-info.outputs.IS_NEW_RELEASE == 'true' }}
        run: |
          url="https://${GITHUB_REPOSITORY_OWNER}.github.io/${GITHUB_REPOSITORY#"${GITHUB_REPOSITORY_OWNER}/"}/releases/${DOCSITE_RELEASE_VERSION}"
          cat <<-EOT > index.html
            <!DOCTYPE html>
            <html>
            <head>
              <title>SuperDiff Documentation</title>
              <meta http-equiv="refresh" content="0; url='${url}'" />
            </head>
            <body>
              <p>
                This page has moved to a different URL.
                Please click
                <a href="${url}">
                  this link
                </a>
                if you are not redirected.
              </p>
            </body>
            </html>
          EOT
        env:
          DOCSITE_RELEASE_VERSION: ${{ needs.collect-docsite-release-info.outputs.DOCSITE_RELEASE_VERSION }}
      - name: Copy site/ to ${{ needs.collect-docsite-release-info.outputs.DOCSITE_DESTINATION_PATH }}
        run: |
          rm -rf "$DOCSITE_DESTINATION_PATH"
          mkdir -p "$(dirname "$DOCSITE_DESTINATION_PATH")"
          mv site "$DOCSITE_DESTINATION_PATH"
        env:
          DOCSITE_DESTINATION_PATH: ${{ needs.collect-docsite-release-info.outputs.DOCSITE_DESTINATION_PATH }}
      - name: Publish new version of docsite
        run: |
          git add -A .
          git config user.name "${GITHUB_ACTOR}"
          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
          git commit -m "Publish docs at $DOCSITE_DESTINATION_PATH"
          git push
        env:
          DOCSITE_DESTINATION_PATH: ${{ needs.collect-docsite-release-info.outputs.DOCSITE_DESTINATION_PATH }}
      - name: Announce publishing of docsite as a comment on the PR
        if: ${{ github.event_name == 'pull_request' }}
        run: |
          gh pr comment "$PULL_REQUEST_NUMBER" --body ":book: A new version of the docsite has been published at: <https://${GITHUB_REPOSITORY_OWNER}.github.io/super_diff/$DOCSITE_DESTINATION_PATH>"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PULL_REQUEST_NUMBER: ${{ github.event.number }}
          DOCSITE_DESTINATION_PATH: ${{ needs.collect-docsite-release-info.outputs.DOCSITE_DESTINATION_PATH }}

  unpublish_docsite:
    runs-on: ubuntu-latest
    needs:
      - collect-release-info
      - collect-docsite-release-info
    if: ${{ github.event_name == 'pull_request' && needs.collect-release-info.outputs.IS_NEW_RELEASE == 'false' && github.event.action == 'closed' }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: gh-pages
      - name: Set DOCSITE_DESTINATION_PARENT_PATH
        run: |
          set -x
          DOCSITE_DESTINATION_PARENT_PATH="$(dirname "$DOCSITE_DESTINATION_PATH")"
          echo "DOCSITE_DESTINATION_PARENT_PATH=$DOCSITE_DESTINATION_PARENT_PATH" >> "$GITHUB_ENV"
        env:
          DOCSITE_DESTINATION_PATH: ${{ needs.collect-docsite-release-info.outputs.DOCSITE_DESTINATION_PATH }}
      - name: Remove ${{ env.DOCSITE_DESTINATION_PARENT_PATH }} on gh-pages
        run: |
          set -x
          if [[ "$DOCSITE_DESTINATION_PARENT_PATH" == "releases" || "$DOCSITE_DESTINATION_PARENT_PATH" == "branches" ]]; then
            echo "Not removing $DOCSITE_DESTINATION_PARENT_PATH."
            exit 1
          fi
          rm -rf "$DOCSITE_DESTINATION_PARENT_PATH"
      - name: Re-push docsite if necessary
        run: |
          git add -A .
          if ! git diff --cached --quiet; then
            git config user.name "${GITHUB_ACTOR}"
            git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
            git commit -m "Remove $DOCSITE_DESTINATION_PARENT_PATH"
            git push
          fi