CI: switch to GitHub Actions

.gitattributes

@@ -8,7 +8,6 @@
 /.gitattributes export-ignore
 /.gitignore export-ignore
 /.phpcs.xml.dist export-ignore
-/.travis.yml export-ignore
 /phpunit.xml.dist export-ignore
 /.github export-ignore
 /bin export-ignore

.github/workflows/basics.yml

@@ -0,0 +1,62 @@
+name: BasicQA
+
+on:
+  # Run on all pushes and on all pull requests.
+  # Prevent the "push" build from running when there are only irrelevant changes.
+  push:
+    paths-ignore:
+      - '**.md'
+  pull_request:
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+jobs:
+  checkcs:
+    name: 'Basic CS and QA checks'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.4'
+          coverage: none
+          tools: cs2pr
+
+      - name: 'Lint PHP against parse errors'
+        run: ./bin/php-lint
+
+      - name: Install xmllint
+        run: sudo apt-get install --no-install-recommends -y libxml2-utils
+
+      # Show XML violations inline in the file diff.
+      # @link https://github.com/marketplace/actions/xmllint-problem-matcher
+      - uses: korelstar/xmllint-problem-matcher@v1
+
+      # Validate the composer.json file.
+      # @link https://getcomposer.org/doc/03-cli.md#validate
+      - name: Validate Composer installation
+        run: composer validate --no-check-all --strict
+
+      - name: 'Composer: adjust dependencies'
+        # Using PHPCS `master` as an early detection system for bugs upstream.
+        run: composer require --no-update --no-scripts squizlabs/php_codesniffer:"dev-master"
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: Install Composer dependencies
+        uses: "ramsey/composer-install@v1"
+
+      - name: 'Validate XML against schema and check code style'
+        run: ./bin/xml-lint
+
+      # Check the code-style consistency of the PHP files.
+      - name: Check PHP code style
+        continue-on-error: true
+        run: vendor/bin/phpcs --report-full --report-checkstyle=./phpcs-report.xml
+
+      - name: Show PHPCS results in PR
+        run: cs2pr ./phpcs-report.xml

.github/workflows/test.yml

@@ -0,0 +1,101 @@
+name: Test
+
+on:
+  # Run on all pushes and on all pull requests.
+  # Prevent the "push" build from running when there are only irrelevant changes.
+  push:
+    paths-ignore:
+      - '**.md'
+  pull_request:
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      # Keys:
+      # - php: The PHP versions to test against.
+      # - phpcs_version: The PHPCS versions to test against.
+      #   IMPORTANT: test runs shouldn't fail because of PHPCS being incompatible with a PHP version.
+      #   - PHPCS will run without errors on PHP 5.4 - 7.4 on any supported version.
+      #   - PHP 8.0 needs PHPCS 3.5.7+ to run without errors.
+      # - The `wpcs_version` key is added to allow additional test builds when multiple WPCS versions
+      #   would be supported. As, at this time, only the latest stable release of WPCS is supported,
+      #   no additional versions are included in the array.
+      # - experimental: Whether the build is "allowed to fail".
+      matrix:
+        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4']
+        phpcs_version: ['3.5.5', 'dev-master']
+        wpcs_version: ['2.3.*']
+        experimental: [false]
+
+        include:
+          # Complete the matrix by adding PHP 8.0, but only test against compatible PHPCS versions.
+          - php: '8.0'
+            phpcs_version: 'dev-master'
+            wpcs_version: '2.3.*'
+            experimental: false
+          - php: '8.0'
+            # PHPCS 3.5.7 is the lowest version of PHPCS which supports PHP 8.0.
+            phpcs_version: '3.5.7'
+            wpcs_version: '2.3.*'
+            experimental: false
+
+          # Experimental builds. These are allowed to fail.
+          #- php: '8.1'
+          #  phpcs_version: 'dev-master'
+          #  wpcs_version: '2.3.*'
+          #  experimental: true
+
+    name: "Test: PHP ${{ matrix.php }} - PHPCS ${{ matrix.phpcs_version }} - WPCS ${{ matrix.wpcs_version }}"
+
+    continue-on-error: ${{ matrix.experimental }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      # On stable PHPCS versions, allow for PHP deprecation notices.
+      # Unit tests don't need to fail on those for stable releases where those issues won't get fixed anymore.
+      - name: Setup ini config
+        id: set_ini
+        run: |
+          if [[ "${{ matrix.phpcs_version }}" != "dev-master" ]]; then
+            echo '::set-output name=PHP_INI::error_reporting=E_ALL & ~E_DEPRECATED'
+          else
+            echo '::set-output name=PHP_INI::error_reporting=E_ALL'
+          fi
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          ini-values: ${{ steps.set_ini.outputs.PHP_INI }}
+          coverage: none
+
+      - name: 'Composer: set PHPCS and WPCS versions for tests'
+        run: |
+          composer require --no-update --no-scripts squizlabs/php_codesniffer:"${{ matrix.phpcs_version }}"
+          composer require --no-update --no-scripts wp-coding-standards/wpcs:"${{ matrix.wpcs_version }}"
+
+      # Install dependencies and handle caching in one go.
+      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      - name: Install Composer dependencies - normal
+        if: ${{ startsWith( matrix.php, '8' ) == false }}
+        uses: "ramsey/composer-install@v1"
+
+      # PHPUnit 7.x does not allow for installation on PHP 8, so ignore platform
+      # requirements to get PHPUnit 7.x to install on nightly.
+      - name: Install Composer dependencies - with ignore platform
+        if: ${{ startsWith( matrix.php, '8' ) }}
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: --ignore-platform-reqs
+
+      - name: Run the unit tests
+        run: ./bin/unit-tests
+
+      - name: Run the ruleset tests
+        run: ./bin/ruleset-tests

bin/xml-lint

@@ -9,7 +9,6 @@
 #   ./bin/xml-lint
 
 # Validate the ruleset XML files.
-#xmllint --noout --schema ./vendor/squizlabs/php_codesniffer/phpcs.xsd ./*/ruleset.xml
 xmllint --noout --schema ./vendor/squizlabs/php_codesniffer/phpcs.xsd ./*/ruleset.xml
 
 # Check the code-style consistency of the XML files.