Tools: Move from Travis CI to GitHub Actions for PR tests (#674)

The WordPress project is moving away from Travis CI, so this migrates our CI checks to GitHub Actions. This only applies to automated linters and unit tests run on github PRs, nothing should change for local development.

.github/bin/phpcs-branch.php

@@ -19,7 +19,7 @@ function run_phpcs( $file, $bin_dir ) {
 
 function run_phpcs_changed( $file, $git, $base_branch, $bin_dir ) {
 	$name = basename( $file );
-	exec( "$git diff $base_branch HEAD $file > $name.diff" );
+	exec( "$git diff $base_branch $file > $name.diff" );
 	exec( "$git show $base_branch:$file | $bin_dir/phpcs --standard=./phpcs.xml.dist --report=json -nq > $name.orig.phpcs" );
 	exec( "cat $file | $bin_dir/phpcs --standard=./phpcs.xml.dist --report=json -nq > $name.phpcs" );
 
@@ -33,7 +33,7 @@ function run_phpcs_changed( $file, $git, $base_branch, $bin_dir ) {
 }
 
 function main() {
-	$base_branch = getenv( 'TRAVIS_BRANCH' );
+	$base_branch = 'remotes/origin/' . getenv( 'BASE_REF' );
 	$git_dir     = dirname( dirname( __DIR__ ) );
 	$bin_dir     = dirname( dirname( __DIR__ ) ) . '/public_html/wp-content/mu-plugins/vendor/bin';
 	$git         = "git -C $git_dir";
@@ -42,10 +42,14 @@ function main() {
 		echo "\nScanning changed files...\n";
 		$status = 0;
 
-		$affected_files = shell_exec( "$git diff $base_branch...HEAD --name-status --diff-filter=AM 2>&1 | grep .php$" );
+		$affected_files = shell_exec( "$git diff $base_branch --name-status --diff-filter=AM 2>&1 | grep .php$" );
 		$affected_files = explode( "\n", trim( $affected_files ) );
 
 		foreach ( $affected_files as $record ) {
+			if ( ! $record ) {
+				continue;
+			}
+
 			list( $change, $file ) = explode( "\t", trim( $record ) );
 			$cmd_status = 0;
 

.github/workflows/linter.yml

@@ -0,0 +1,50 @@
+name: Static Analysis (Linting)
+
+# Run on any changes in public_html
+on:
+  pull_request:
+    paths:
+    - public_html/**
+  push:
+    branches: [production]
+    paths:
+    - public_html/**
+
+jobs:
+  check:
+    name: All
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - uses: actions/cache@v2
+      with:
+        path: '**/node_modules'
+        key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+
+    - name: Use Node.js 12.x
+      uses: actions/setup-node@v2-beta
+      with:
+        node-version: 12.x
+
+    - name: composer install
+      run: |
+        composer install
+
+    - name: yarn install and build
+      run: |
+        yarn
+        yarn workspaces run build
+
+    - name: Lint JavaScript and Styles
+      run: |
+        yarn workspaces run lint:js
+        yarn workspaces run lint:css
+
+    - name: Lint PHP
+      run: |
+        BASE_REF=${{ github.base_ref }} php .github/bin/phpcs-branch.php 

.github/workflows/unit-tests.yml

@@ -0,0 +1,86 @@
+name: Unit Tests
+
+# Run on any changes in public_html
+on:
+  pull_request:
+    paths:
+    - public_html/**
+  push:
+    branches: [production]
+    paths:
+    - public_html/**
+
+jobs:
+  unit-js:
+    name: JavaScript
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: actions/cache@v2
+      with:
+        path: '**/node_modules'
+        key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+
+    - name: Use Node.js 12.x
+      uses: actions/setup-node@v2-beta
+      with:
+        node-version: 12.x
+
+    - name: Install dependencies
+      # We don't need to build, since jest can interpret the source files.
+      run: yarn
+
+    # Run the Blocks unit tests. If/when other workspaces get tests, those would be added here.
+    - name: Running the tests
+      run: yarn workspace wordcamp-blocks run test
+
+  unit-php:
+    name: PHP Tests
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: ['7.4'] # 8.0 -- Add back to matrix when 8.0 is supported.
+
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ALLOW_EMPTY_PASSWORD: false
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: wcorg_test
+        ports:
+          - 3306/tcp
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set PHP version
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-version }}
+        coverage: none
+        tools: composer:v1
+
+    - name: Start mysql service
+      run: sudo /etc/init.d/mysql start
+
+    - name: Install dependencies
+      run: composer install
+
+    - name: Install WordPress
+      run: |
+        bash .docker/bin/install-wp-tests.sh wcorg_test root root 127.0.0.1 trunk
+
+    - name: Install required plugins
+      run: |
+        svn export https://plugins.svn.wordpress.org/jetpack/trunk public_html/wp-content/plugins/jetpack
+
+    - name: Running unit tests
+      run: ./public_html/wp-content/mu-plugins/vendor/bin/phpunit -c phpunit.xml.dist

.nvmrc

@@ -1 +1 @@
-lts/*
+12