Support short name prefixes

Author: dantleech

lib/Adapter/Composer/Psr0NameInflector.php

@@ -9,7 +9,12 @@ final class Psr0NameInflector implements NameInflector
 {
     public function inflectToRelativePath(string $prefix, ClassName $className, string $mappedPath): FilePath
     {
+        if (substr($prefix, -1) !== '\\' && $className->beginsWith($prefix)) {
+            $className = substr($className, strlen($prefix));
+        }
+
         $relativePath = str_replace('\\', '/', $className).'.php';
+
         return FilePath::fromParts([$mappedPath, $relativePath]);
     }
 

lib/Domain/FilePath.php

@@ -10,6 +10,7 @@ final class FilePath
 
     private function __construct(string $path)
     {
+        $path = Path::canonicalize($path);
         $this->path = $path;
     }
 
@@ -25,7 +26,6 @@ public function __toString()
 
     public static function fromString($path)
     {
-        $path = Path::canonicalize($path);
         return new self($path);
     }
 

tests/Integration/Composer/ComposerClassToFileTest.php

@@ -93,6 +93,15 @@ public function testPsr0Fallback()
         $this->assertClassNameToFilePath('Acme\\Test\\Class', [ 'psr0/Acme/Test/Class.php' ]);
     }
 
+    /**
+     * @testdox PSR-0 short name prefix
+     */
+    public function testPsr0ShortNamePrefix()
+    {
+        $this->loadExample('psr0-short-prefix.json');
+        $this->assertClassNameToFilePath('Twig_Extension', [ 'psr0/twig/Extension.php' ]);
+    }
+
     /**
      * @testdox PSR-4 fallback
      */

tests/Integration/Composer/composers/psr0-short-prefix.json

@@ -0,0 +1,16 @@
+{
+    "name": "dantleech/basic",
+    "authors": [
+        {
+            "name": "dantleech",
+            "email": "dan.t.leech@gmail.com"
+        }
+    ],
+    "require": {},
+    "autoload": {
+        "psr-0": {
+            "Twig_": "psr0/twig/"
+        }
+    }
+}
+