ci.yml

---
name: CI
on:
  push:
    paths:
      - "Formula/*.rb"
    branches:
      - master

  pull_request:
    paths:
      - "Formula/*.rb"
    branches:
      - master

  workflow_dispatch:

jobs:
  test:
    name: Test Formulae
    runs-on: macos-11
    steps:

      # https://github.com/Homebrew/actions/tree/master/setup-homebrew
      #
      # this action handles checkout of the repo
      - name: Set up Homebrew
        id: set-up-homebrew
        uses: Homebrew/actions/setup-homebrew@master
        with:
          test-bot: true

      - name: Setup Tap
        run: |
          mkdir -p $(brew --repo)/Library/Taps/kong
          ln -s $PWD $(brew --repo)/Library/Taps/kong/homebrew-kong

      - name: Cache Homebrew Bundler RubyGems & Downloads
        id: cache
        uses: actions/cache@v1
        with:
          path: |
            ${{ steps.set-up-homebrew.outputs.gems-path }}
            /usr/local/Homebrew/Library/Caches/Homebrew/downloads
          key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
          restore-keys: ${{ runner.os }}-rubygems-

      - name: Install Homebrew Bundler RubyGems & Downloads
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          brew install-bundler-gems

          # use brew tap-info to prime cache of formulae deps
          brew tap-info -v -d kong/kong --json \
            | jq -r '.[].formula_names[]' \
            | xargs brew fetch --deps

      - id: files
        uses: jitterbit/get-changed-files@v1

      - name: Get Changed Formulae
        id: changes
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "::set-output name=formulae::$(
            # extract formula name from file for changed files
            echo -n '${{ steps.files.outputs.added_modified }}' \
              | tr ' ' '\n' \
              | sort -ru \
              | sed -ne 's^Formula/\(.*\)\.rb^\1^gp' \
              | tr '\n' ','
          )"

      - name: Brew Style (Kong)
        if: contains(steps.changes.outputs.formulae, 'kong') == true
        run: |
          echo "::add-matcher::.github/matcher.json"
          brew style \
            --except-cops FormulaAudit/DependencyOrder \
            {${{ steps.changes.outputs.formulae }}}

      - name: Brew Style (Non-Kong)
        if: contains(steps.changes.outputs.formulae, 'kong') == false
        run: |
          echo "::add-matcher::.github/matcher.json"
          brew style \
            {${{ steps.changes.outputs.formulae }}}

      - name: Brew Audit
        if: contains(steps.changes.outputs.formulae, 'kong') == true
        run: |
          echo "::add-matcher::.github/matcher.json"
          brew audit \
            --online \
            --except-cops FormulaAudit/DependencyOrder \
            {${{ steps.changes.outputs.formulae }}}

      - name: Brew Audit (Non-Kong)
        if: contains(steps.changes.outputs.formulae, 'kong') == false
        run: |
          echo "::add-matcher::.github/matcher.json"
          brew audit \
            --online \
            {${{ steps.changes.outputs.formulae }}}

      - name: Installation of Kong should fail
        run: |
          set -x

          # already installed on these runners
          brew uninstall --force nginx

          # skip cleanup since this is an ephemeral build
          export HOMEBREW_NO_INSTALL_CLEANUP=1

          ! brew install kong