Fixed path analysis

src/Composer/Autoload/AutoloadGenerator.php

@@ -328,7 +328,7 @@ EOF;
         $path = $filesystem->normalizePath($path);
 
         $baseDir = '';
-        if (strpos($path, $vendorPath) === 0) {
+        if (strpos($path.'/', $vendorPath.'/') === 0) {
             $path = substr($path, strlen($vendorPath));
             $baseDir = '$vendorDir';
 

src/Composer/Util/Filesystem.php

@@ -222,12 +222,12 @@ class Filesystem
             return './'.basename($to);
         }
 
-        $commonPath = $to.'/';
-        while (strpos($from, $commonPath) !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath) && '.' !== $commonPath) {
-            $commonPath = strtr(dirname($commonPath), '\\', '/');
+        $commonPath = $to;
+        while (strpos($from.'/', $commonPath.'/') !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath)) {
+            $commonPath = dirname($commonPath);
         }
 
-        if (0 !== strpos($from, $commonPath) || '/' === $commonPath || '.' === $commonPath) {
+        if (0 !== strpos($from, $commonPath) || '/' === $commonPath) {
             return $to;
         }
 
@@ -260,12 +260,12 @@ class Filesystem
             return $directories ? '__DIR__' : '__FILE__';
         }
 
-        $commonPath = $to.'/';
-        while (strpos($from, $commonPath) !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath) && '.' !== $commonPath) {
-            $commonPath = strtr(dirname($commonPath), '\\', '/');
+        $commonPath = $to;
+        while (strpos($from.'/', $commonPath.'/') !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath)) {
+            $commonPath = dirname($commonPath);
         }
 
-        if (0 !== strpos($from, $commonPath) || '/' === $commonPath || '.' === $commonPath) {
+        if (0 !== strpos($from, $commonPath) || '/' === $commonPath) {
             return var_export($to, true);
         }
 

tests/Composer/Test/Autoload/AutoloadGeneratorTest.php

@@ -869,6 +869,37 @@ EOF;
         $this->assertEquals($expectedClassmap, file_get_contents($this->vendorDir.'/composer/autoload_classmap.php'));
     }
 
+    public function testVendorSubstringPath()
+    {
+        $package = new Package('a', '1.0', '1.0');
+        $package->setAutoload(array(
+            'psr-0' => array('Foo' => 'composer-test-autoload-src/src'),
+        ));
+
+        $this->repository->expects($this->once())
+            ->method('getCanonicalPackages')
+            ->will($this->returnValue(array()));
+
+        $this->fs->ensureDirectoryExists($this->vendorDir.'/a');
+
+        $expectedNamespace = <<<'EOF'
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Foo' => array($baseDir . '/composer-test-autoload-src/src'),
+);
+
+EOF;
+
+        $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', false, 'VendorSubstring');
+        $this->assertEquals($expectedNamespace, file_get_contents($this->vendorDir.'/composer/autoload_namespaces.php'));
+    }
+
     private function assertAutoloadFiles($name, $dir, $type = 'namespaces')
     {
         $a = __DIR__.'/Fixtures/autoload_'.$name.'.php';

tests/Composer/Test/Util/FilesystemTest.php

@@ -60,6 +60,8 @@ class FilesystemTest extends TestCase
             array('C:/Temp/../..', 'd:\Temp\..\..\test', true, "'d:/test'"),
             array('/foo/bar', '/foo/bar_vendor', true, "dirname(__DIR__).'/bar_vendor'"),
             array('/foo/bar_vendor', '/foo/bar', true, "dirname(__DIR__).'/bar'"),
+            array('/foo/bar_vendor', '/foo/bar/src', true, "dirname(__DIR__).'/bar/src'"),
+            array('/foo/bar_vendor/src2', '/foo/bar/src/lib', true, "dirname(dirname(__DIR__)).'/bar/src/lib'"),
         );
     }
 
@@ -107,6 +109,8 @@ class FilesystemTest extends TestCase
             array('/tmp', '/tmp/../../test', '/test', true),
             array('/foo/bar', '/foo/bar_vendor', '../bar_vendor', true),
             array('/foo/bar_vendor', '/foo/bar', '../bar', true),
+            array('/foo/bar_vendor', '/foo/bar/src', '../bar/src', true),
+            array('/foo/bar_vendor/src2', '/foo/bar/src/lib', '../../bar/src/lib', true),
         );
     }