ci.yml

name: CI

on: pull_request

env:
  HOMEBREW_DEVELOPER: 1
  HOMEBREW_NO_AUTO_UPDATE: 1
  HOMEBREW_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

jobs:
  generate-matrix:
    outputs:
      matrix: ${{ steps.generate-matrix.outputs.matrix }}
    runs-on: ubuntu-latest
    steps:
      - name: Set up Homebrew
        id: set-up-homebrew
        uses: Homebrew/actions/setup-homebrew@master
        with:
          test-bot: false

      - name: Check out Pull Request
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Generate CI matrix
        id: generate-matrix
        run: |
          brew ruby -- "$(brew --repository homebrew/cask)/cmd/lib/generate-matrix.rb" "${{ github.event.pull_request.url }}"

  test:
    name: ${{ matrix.name }}
    needs: generate-matrix
    runs-on: macos-latest
    strategy:
      matrix:
        include: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}
    steps:
      - name: Set up Homebrew
        id: set-up-homebrew
        uses: Homebrew/actions/setup-homebrew@master
        with:
          test-bot: false

      - name: Check out Pull Request
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Clean up CI machine
        run: |
          if ! brew cask ls visual-studio &>/dev/null; then
            if ! rm -r '/Applications/Visual Studio.app'; then
              echo '::warning::Removing Visual Studio is no longer necessary.'
            fi
          fi

          if ! rm /usr/local/bin/dotnet; then
            echo '::warning::Removing `dotnet` symlink is no longer necessary.'
          fi

          if ! rm /usr/local/bin/pod; then
            echo '::warning::Removing `cocoapods` symlink is no longer necessary.'
          fi

          if brew tap-info adoptopenjdk/openjdk; then
            brew untap adoptopenjdk/openjdk
          else
            echo '::warning::Untapping adoptopenjdk/openjdk is no longer necessary.'
          fi

      - name: Cache Homebrew Gems
        uses: actions/cache@v2
        with:
          path: ${{ steps.set-up-homebrew.outputs.gems-path }}
          key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
          restore-keys: ${{ runner.os }}-rubygems-

      - name: Install Homebrew Gems
        run: brew install-bundler-gems

      - name: Run brew cask style
        run: brew cask style
        if: success() && !matrix.cask

      - name: Run brew cask audit ${{ matrix.cask.token }}
        run: |
          if ${{ !matrix.cask }}; then
            brew cask audit
            exit $?
          fi

          brew cask audit ${{ join(matrix.audit_args, ' ') }} '${{ matrix.cask.path }}'
        timeout-minutes: 30
        if: always()

      - name: Gather cask information
        id: info
        run: |
          brew ruby <<'EOF'
            require 'cask/cask_loader'
            require 'cask/installer'

            cask = Cask::CaskLoader.load('${{ matrix.cask.path }}')

            was_installed = cask.installed?
            manual_installer = cask.artifacts.any? { |artifact|
              artifact.is_a?(Cask::Artifact::Installer::ManualInstaller)
            }

            macos_requirement_satisfied = if macos_requirement = cask.depends_on.macos
              macos_requirement.satisfied?
            else
              true
            end

            cask_conflicts = cask.conflicts_with&.dig(:cask).to_a.select { |c| Cask::CaskLoader.load(c).installed? }
            formula_conflicts = cask.conflicts_with&.dig(:formula).to_a.select { |f| Formula[f].any_version_installed? }

            installer = Cask::Installer.new(cask)
            cask_and_formula_dependencies = installer.missing_cask_and_formula_dependencies

            cask_dependencies = cask_and_formula_dependencies.select { |d| d.is_a?(Cask::Cask) }.map(&:full_name)
            formula_dependencies = cask_and_formula_dependencies.select { |d| d.is_a?(Formula) }.map(&:full_name)

            puts "::set-output name=was_installed::#{JSON.generate(was_installed)}"
            puts "::set-output name=manual_installer::#{JSON.generate(manual_installer)}"
            puts "::set-output name=macos_requirement_satisfied::#{JSON.generate(macos_requirement_satisfied)}"
            puts "::set-output name=cask_conflicts::#{JSON.generate(cask_conflicts)}"
            puts "::set-output name=cask_dependencies::#{JSON.generate(cask_dependencies)}"
            puts "::set-output name=formula_conflicts::#{JSON.generate(formula_conflicts)}"
            puts "::set-output name=formula_dependencies::#{JSON.generate(formula_dependencies)}"
          EOF
        if: always() && matrix.cask

      - name: Uninstall conflicting formulae
        run: |
          brew uninstall ${{ join(fromJSON(steps.info.outputs.formula_conflicts), ' ') }}
        if: always() && steps.info.outcome == 'success' && join(fromJSON(steps.info.outputs.formula_conflicts)) != ''
        timeout-minutes: 30

      - name: Uninstall conflicting casks
        run: |
          brew cask uninstall ${{ join(fromJSON(steps.info.outputs.cask_conflicts), ' ') }}
        if: always() && steps.info.outcome == 'success' && join(fromJSON(steps.info.outputs.cask_conflicts)) != ''
        timeout-minutes: 30

      - name: Run brew cask zap ${{ matrix.cask.token }}
        run: |
          brew cask zap '${{ matrix.cask.path }}'
        if: always() && steps.info.outcome == 'success' && fromJSON(steps.info.outputs.was_installed)
        timeout-minutes: 30

      - name: Take snapshot of installed and running apps and services
        id: snapshot
        run: |
          brew ruby -r "$(brew --repository homebrew/cask)/cmd/lib/check.rb" <<'EOF'
            puts "::set-output name=before::#{JSON.generate(Check.all)}"
          EOF
        if: always() && steps.info.outcome == 'success'

      - name: Run brew cask install ${{ matrix.cask.token }}
        id: install
        run: brew cask install '${{ matrix.cask.path }}'
        if: >
          always() && steps.info.outcome == 'success' &&
          fromJSON(steps.info.outputs.macos_requirement_satisfied) &&
          !matrix.skip_install
        timeout-minutes: 30

      - name: Run brew cask uninstall ${{ matrix.cask.token }}
        run: brew cask uninstall '${{ matrix.cask.path }}'
        if: always() && steps.install.outcome == 'success' && !fromJSON(steps.info.outputs.manual_installer)
        timeout-minutes: 30

      - name: Uninstall formula dependencies
        run: |
          brew uninstall ${{ join(fromJSON(steps.info.outputs.formula_dependencies), ' ') }}
        if: always() && steps.install.outcome == 'success' && join(fromJSON(steps.info.outputs.formula_dependencies)) != ''
        timeout-minutes: 30

      - name: Uninstall cask dependencies
        run: |
          brew cask uninstall ${{ join(fromJSON(steps.info.outputs.cask_dependencies), ' ') }}
        if: always() && steps.install.outcome == 'success' && join(fromJSON(steps.info.outputs.cask_dependencies)) != ''
        timeout-minutes: 30

      - name: Compare installed and running apps and services with snapshot
        run: |
          brew ruby -r "$(brew --repository homebrew/cask)/cmd/lib/check.rb" <<'EOF'
            before = JSON.parse(<<~'EOS').transform_keys(&:to_sym)
              ${{ steps.snapshot.outputs.before }}
            EOS
            after = Check.all

            errors = Check.errors(before, after)

            errors.each do |error|
              onoe error
            end

            error = errors.map { |e|
              Tty.strip_ansi(e)
                .gsub(/\r/, '%0D')
                .gsub(/\n/, '%0A')
                .gsub(/]/, '%5D')
                .gsub(/;/, '%3B')
            }.join("\n\n")

            puts "::error file=${{ matrix.cask.path }}::#{error}"

            exit 1 if errors.any?
          EOF
        if: always() && steps.snapshot.outcome == 'success'
  conclusion:
    name: conclusion
    needs: test
    runs-on: ubuntu-latest
    if: always()
    steps:
      - name: Result
        run: ${{ needs.test.result == 'success' }}