feat: 解析する深さを制限できるようにする

config.php

@@ -14,4 +14,5 @@
     'excludeFromAnalysis' => [
         'PhpParser\Node\\',
     ],
+    'maxDepth' => 5,
 ];

src/Config/Config.php

@@ -9,6 +9,7 @@ class Config
     private static array $endOfAnalysis = [];
     /** @var string[] */
     private static array $excludeFromAnalysis = [];
+    private static int $maxDepth = 5;
 
     public static function initialize(string $baseDir): void
     {
@@ -25,6 +26,7 @@ public static function initialize(string $baseDir): void
         self::$memoryLimit = $config['memoryLimit'] ?? '1024M';
         self::$endOfAnalysis = $config['endOfAnalysis'] ?? [];
         self::$excludeFromAnalysis = $config['excludeFromAnalysis'] ?? [];
+        self::$maxDepth = $config['maxDepth'] ?? 5;
     }
 
     public static function memoryLimit(): string
@@ -47,4 +49,9 @@ public static function excludeFromAnalysis(): array
     {
         return self::$excludeFromAnalysis;
     }
+
+    public static function maxDepth(): int
+    {
+        return self::$maxDepth;
+    }
 }

src/DiagramUnit.php

@@ -86,7 +86,7 @@ public function ancestors(): array {
 
     public function shouldStopTraverse(): bool
     {
-        return $this->isCirculating || $this->isEndOfAnalysis();
+        return $this->isCirculating || $this->isEndOfAnalysis() || $this->layer === Config::maxDepth();
     }
 
     private function isEndOfAnalysis(): bool

tests/Visitor/ClassVisitorTest.php

@@ -2,12 +2,14 @@
 
 namespace Hirokinoue\DependencyVisualizer\Tests\Visitor;
 
+use _HumbugBox72e598a46208\RdKafka\Conf;
 use Hirokinoue\DependencyVisualizer\ClassManipulator\ClassLikeNodeFinder;
 use Hirokinoue\DependencyVisualizer\ClassManipulator\ClassLikeWrapper;
 use Hirokinoue\DependencyVisualizer\ClassManipulator\ClassLoader;
 use Hirokinoue\DependencyVisualizer\Config\Config;
 use Hirokinoue\DependencyVisualizer\DiagramUnit;
 use Hirokinoue\DependencyVisualizer\Exporter\StringExporter;
+use Hirokinoue\DependencyVisualizer\Logger;
 use Hirokinoue\DependencyVisualizer\Visitor\ClassVisitor;
 use PhpParser\Node\Identifier;
 use PhpParser\Node\Name\FullyQualified;
@@ -134,6 +136,28 @@ public function data指定された名前空間を解析しないこと(): array
         ];
     }
 
+    /**
+     * @noinspection NonAsciiCharacters
+     */
+    public function test指定された深さ以上解析しないこと(): void
+    {
+        // given
+        Config::initialize(__DIR__ . '/../data/Visitor/Config/maxDepth');
+        $sut = new ClassVisitor(new DiagramUnit(
+            '\Foo',
+            ['\Foo'],
+            false,
+            new ClassLikeWrapper(new Class_(new Identifier('Foo'))),
+            1
+        ));
+
+        // when
+        $sut->enterNode(new FullyQualified('Hirokinoue\DependencyVisualizer\Tests\data\Baz'));
+
+        // then
+        $this->assertSame(2, DiagramUnit::countVisitedClasses());
+    }
+
     /**
      * @return Stmt[]
      */

tests/data/Visitor/Config/maxDepth/config.dist.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+return $config = [
+    'memoryLimit' => '',
+    'endOfAnalysis' => [],
+    'excludeFromAnalysis' => [],
+    'maxDepth' => 2,
+];