name: GitHub Actions CI
on:
  push:
    branches: master
  pull_request: []
jobs:
  tests:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macOS-latest]
    steps:
    - name: Set up Git repository
      uses: actions/checkout@master

    - name: Set up Homebrew
      run: |
        if [ "$RUNNER_OS" = "Linux" ]; then
          HOMEBREW_REPOSITORY=/home/linuxbrew/.linuxbrew
          sudo mkdir -p /home/linuxbrew
          sudo ln -s "$PWD" "$HOMEBREW_REPOSITORY"
          sudo chown -R "$USER" /home/linuxbrew
        else
          HOMEBREW_REPOSITORY="$(brew --repo)"
          mv "$HOMEBREW_REPOSITORY/Library/Taps" "$PWD/Library"
          sudo rm -rf "$HOMEBREW_REPOSITORY"
          sudo ln -s "$PWD" "$HOMEBREW_REPOSITORY"
          brew update-reset Library/Taps/homebrew/homebrew-core

          # Install taps needed for 'brew tests'
          brew tap homebrew/cask
          brew tap homebrew/bundle
          brew tap homebrew/services
        fi

    - name: Install Bundler RubyGems
      run: |
        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        brew install-bundler-gems

        # Check for uncommitted gems
        git -C $(brew --repo) diff --stat --exit-code Library/Homebrew/vendor/bundle/ruby

        if [ "$RUNNER_OS" = "Linux" ]; then
          # Fix permissions for 'brew tests'
          sudo chmod -R g-w,o-w /home/linuxbrew /home/runner /opt
        fi

    - name: Run brew tests
      run: |
        # brew tests doesn't like world writable directories
        umask 022

        # set variables for coverage reporting
        export HOMEBREW_CI_BUILD_NUMBER="$GITHUB_REF"
        export HOMEBREW_CI_BRANCH="$HEAD_GITHUB_REF"
        export HOMEBREW_GITHUB_REPOSITORY="$GITHUB_REPOSITORY"

        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        brew tests --no-compat --online
        brew tests --generic --online
        brew tests --online --coverage
      env:
        HOMEBREW_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

        # set variables for coverage reporting
        HOMEBREW_GITHUB_ACTIONS: 1
        HOMEBREW_CI_NAME: github-actions
        HOMEBREW_COVERALLS_REPO_TOKEN: 3F6U6ZqctoNJwKyREremsqMgpU3qYgxFk

        # These cannot be queried at the macOS level on GitHub Actions.
        HOMEBREW_LANGUAGES: en-GB

    - name: Run brew style
      run: |
        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        brew style

    - name: Run brew man
      run: |
        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        brew man --fail-if-changed

    - name: Run brew update-tests
      run: |
        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        git config --global user.name "BrewTestBot"
        git config --global user.email "homebrew-test-bot@lists.sfconservancy.org"
        brew update-test
        brew update-test --to-tag
        brew update-test --commit=HEAD

    - name: Run brew readall
      run: |
        export PATH="/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin"
        brew readall --aliases

    - name: Build Docker image
      run: |
        docker pull homebrew/brew
        docker-compose -f Dockerfile.yml build sut
      if: matrix.os == 'ubuntu-latest'

    - name: Run brew test-bot
      run: |
        if [ "$RUNNER_OS" = "Linux" ]; then
          docker-compose -f Dockerfile.yml run --rm -v $GITHUB_WORKSPACE:/tmp/test-bot sut
        else
          brew test-bot
        fi