add static analysis via GitHub CI

Author: deminy

.github/workflows/static_analysis.yml

@@ -0,0 +1,28 @@
+name: Static Analysis
+
+on: [ push, pull_request, workflow_dispatch ]
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.2
+          tools: composer:v2
+          coverage: none
+
+      - name: Install PHPStan
+        uses: nick-invision/retry@v2
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer require phpstan/phpstan=^1.11.x-dev -n -q --no-progress
+
+      - name: Run Static Analysis
+        run: ./vendor/bin/phpstan analyse --no-progress --memory-limit 2G

phpstan.neon.dist

@@ -0,0 +1,5 @@
+parameters:
+  level: 9
+  paths:
+    - ./src
+    - ./tests

src/BackgroundProcessing.php

@@ -90,7 +90,7 @@ public static function reset()
 
     /**
      * @param Closure $op
-     * @param array ...$params
+     * @param array<mixed> ...$params
      * @return void
      */
     public static function add(Closure $op, ...$params)

tests/unit/BasicTest.php

@@ -55,6 +55,9 @@ public function setUp(): void
         BackgroundProcessing::reset();
     }
 
+    /**
+     * @return array<array<mixed>>
+     */
     public static function dataRun(): array
     {
         $closure = function (int ...$params) {
@@ -97,6 +100,7 @@ public static function dataRun(): array
     }
 
     /**
+     * @param array<array{0: \Closure, ?mixed}> $closures
      * @dataProvider dataRun
      * @covers BackgroundProcessing::run()
      * @throws AlreadyInvokedException|InvalidEnvironmentException

tests/unit/DockerizedTest.php

@@ -30,6 +30,9 @@
  */
 class DockerizedTest extends TestCase
 {
+    /**
+     * @return array<array<string, string>>
+     */
     public static function dataRun(): array
     {
         return [