Setup GitHub Actions (#3966)

.github/workflows/main.yml

@@ -0,0 +1,59 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - name: Restore PHP build cache
+        id: php-build-cache
+        uses: actions/cache@v2
+        with:
+          path: "./bin"
+          key: "php-build-generic-${{ hashFiles('./build/php/compile.sh') }}"
+
+      - name: Compile PHP
+        if: steps.php-build-cache.outputs.cache-hit != 'true'
+        run: |
+          sudo apt update && sudo apt install -y re2c libtool libtool-bin
+          march=x86-64 ./build/php/compile.sh -j8
+
+      - name: Prefix PHP to PATH
+        run: echo "$(pwd)/bin/php7/bin" >> $GITHUB_PATH
+
+      - name: Install Composer
+        run: curl -sS https://getcomposer.org/installer | php
+
+      - name: Restore Composer package cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.composer/cache/files
+            ~/.composer/cache/vcs
+          key: composer-cache
+
+      - name: Install Composer dependencies
+        run: php composer.phar install --prefer-dist --no-interaction
+
+      - name: Run PHPStan
+        run: ./vendor/bin/phpstan analyze --no-progress --memory-limit=2G
+      
+      - name: Run PHPUnit tests
+        run: ./vendor/bin/phpunit --bootstrap vendor/autoload.php --fail-on-warning tests/phpunit
+        
+      - name: Run integration tests
+        run: ./tests/travis.sh -t4