Treat empty paths in autoloader as ".", fixes #1727

src/Composer/Autoload/AutoloadGenerator.php

@@ -483,7 +483,11 @@ FOOTER;
                         $path = $package->getTargetDir() . '/' . $path;
                     }
 
-                    $autoloads[$namespace][] = empty($installPath) ? $path : $installPath.'/'.$path;
+                    if (empty($installPath)) {
+                        $autoloads[$namespace][] = empty($path) ? '.' : $path;
+                    } else {
+                        $autoloads[$namespace][] = $installPath.'/'.$path;
+                    }
                 }
             }
         }

tests/Composer/Test/Autoload/AutoloadGeneratorTest.php

@@ -809,6 +809,57 @@ EOF;
         $this->assertContains("require \$baseDir . '/../test.php';", file_get_contents($this->vendorDir.'/composer/autoload_real.php'));
     }
 
+    public function testEmptyPaths()
+    {
+        $package = new Package('a', '1.0', '1.0');
+        $package->setAutoload(array(
+            'psr-0' => array('Foo' => ''),
+            'classmap' => array(''),
+        ));
+
+        $this->repository->expects($this->once())
+            ->method('getPackages')
+            ->will($this->returnValue(array()));
+
+        $this->fs->ensureDirectoryExists($this->workingDir.'/Foo');
+        file_put_contents($this->workingDir.'/Foo/Bar.php', '<?php namespace Foo; class Bar {}');
+        file_put_contents($this->workingDir.'/class.php', '<?php namespace Classmap; class Foo {}');
+
+        $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', true, '_15');
+
+        $expectedNamespace = <<<'EOF'
+<?php
+
+// autoload_namespaces.php generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Foo' => $baseDir . '/',
+);
+
+EOF;
+
+    $expectedClassmap = <<<'EOF'
+<?php
+
+// autoload_classmap.php generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Classmap\\Foo' => $baseDir . '/class.php',
+    'Foo\\Bar' => $baseDir . '/Foo/Bar.php',
+);
+
+EOF;
+
+        $this->assertEquals($expectedNamespace, file_get_contents($this->vendorDir.'/composer/autoload_namespaces.php'));
+        $this->assertEquals($expectedClassmap, file_get_contents($this->vendorDir.'/composer/autoload_classmap.php'));
+    }
+
     private function assertAutoloadFiles($name, $dir, $type = 'namespaces')
     {
         $a = __DIR__.'/Fixtures/autoload_'.$name.'.php';