diff --git a/src/Composer/Autoload/AutoloadGenerator.php b/src/Composer/Autoload/AutoloadGenerator.php
index 9b9710d9e..b881a2163 100644
--- a/src/Composer/Autoload/AutoloadGenerator.php
+++ b/src/Composer/Autoload/AutoloadGenerator.php
@@ -388,6 +388,7 @@ EOF;
     public function parseAutoloads(array $packageMap, PackageInterface $mainPackage)
     {
         $mainPackageMap = array_shift($packageMap);
+        $packageMap = $this->filterPackageMap($packageMap, $mainPackage);
         $sortedPackageMap = $this->sortPackageMap($packageMap);
         $sortedPackageMap[] = $mainPackageMap;
         array_unshift($packageMap, $mainPackageMap);
@@ -899,6 +900,48 @@ INITIALIZER;
         return md5($package->getName() . ':' . $path);
     }
 
+    /**
+     * Filters out dev-dependencies when not in dev-mode
+     * 
+     * @param array $packageMap
+     * @param PackageInterface $mainPackage
+     * @return array
+     */
+    protected function filterPackageMap(array $packageMap, PackageInterface $mainPackage) {
+        if ($this->devMode === true) {
+            return $packageMap;
+        }
+
+        $packages = array();
+        $include = array();
+
+        foreach ($packageMap as $item) {
+            $package = $item[0];
+            $name = $package->getName();
+            $packages[$name] = $package;
+        }
+
+        $add = function (PackageInterface $package) use (&$add, $mainPackage, $packages, &$include) {
+            foreach ($package->getRequires() as $link) {
+                $target = $link->getTarget();
+                $include[$target] = true;
+                if (isset($packages[$target])) {
+                    $add($packages[$target]);
+                }
+            }
+        };
+        $add($mainPackage);
+    
+        return array_filter(
+            $packageMap,
+            function ($item) use ($include) {
+                $package = $item[0];
+                $name = $package->getName();
+                return isset($include[$name]);
+            }
+        );
+    }
+
     /**
      * Sorts packages by dependency weight
      *
diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index 60ab0dfbd..53c16129f 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -201,9 +201,21 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
 
             $hostname = parse_url($url, PHP_URL_HOST) ?: $url;
             $json = $this->rfs->getContents($hostname, $url, false);
-            $results = JsonFile::parseJson($json, $url);
+            $search = JsonFile::parseJson($json, $url);
 
-            return $results['results'];
+            if (empty($search['results'])) {
+                return array();
+            }
+
+            $results = array();
+            foreach ($search['results'] as $result) {
+                // do not show virtual packages in results as they are not directly useful from a composer perspective
+                if (empty($result['virtual'])) {
+                    $results[] = $result;
+                }
+            }
+
+            return $results;
         }
 
         if ($this->hasProviders()) {
diff --git a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
index 75cbcd058..f491a62b5 100644
--- a/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
+++ b/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
@@ -360,6 +360,10 @@ class AutoloadGeneratorTest extends TestCase
     public function testVendorsAutoloading()
     {
         $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -406,6 +410,10 @@ class AutoloadGeneratorTest extends TestCase
     public function testVendorsClassMapAutoloading()
     {
         $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -441,6 +449,10 @@ class AutoloadGeneratorTest extends TestCase
     public function testVendorsClassMapAutoloadingWithTargetDir()
     {
         $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -476,6 +488,11 @@ class AutoloadGeneratorTest extends TestCase
     public function testClassMapAutoloadingEmptyDirAndExactFile()
     {
         $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b'),
+            new Link('a', 'c/c')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -515,6 +532,11 @@ class AutoloadGeneratorTest extends TestCase
     public function testClassMapAutoloadingAuthoritativeAndApcu()
     {
         $package = new Package('a', '1.0', '1.0');
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b'),
+            new Link('a', 'c/c')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -559,6 +581,11 @@ class AutoloadGeneratorTest extends TestCase
     {
         $package = new Package('a', '1.0', '1.0');
         $package->setAutoload(array('files' => array('root.php')));
+        $package->setRequires(array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b'),
+            new Link('a', 'c/c')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -604,6 +631,14 @@ class AutoloadGeneratorTest extends TestCase
 
         $notAutoloadPackage = new Package('a', '1.0', '1.0');
 
+        $requires = array(
+            new Link('a', 'a/a'),
+            new Link('a', 'b/b'),
+            new Link('a', 'c/c')
+        );
+        $autoloadPackage->setRequires($requires);
+        $notAutoloadPackage->setRequires($requires);
+
         $autoloadPackages = array();
         $autoloadPackages[] = $a = new Package('a/a', '1.0', '1.0');
         $autoloadPackages[] = $b = new Package('b/b', '1.0', '1.0');
@@ -667,9 +702,12 @@ class AutoloadGeneratorTest extends TestCase
     {
         $package = new Package('a', '1.0', '1.0');
         $package->setAutoload(array('files' => array('root2.php')));
-        $package->setRequires(array(new Link('a', 'z/foo')));
-        $package->setRequires(array(new Link('a', 'd/d')));
-        $package->setRequires(array(new Link('a', 'e/e')));
+        $package->setRequires(array(
+            new Link('a', 'z/foo'),
+            new Link('a', 'b/bar'),
+            new Link('a', 'd/d'),
+            new Link('a', 'e/e')
+        ));
 
         $packages = array();
         $packages[] = $z = new Package('z/foo', '1.0', '1.0');
@@ -736,7 +774,10 @@ class AutoloadGeneratorTest extends TestCase
             'psr-0' => array('A\\B' => $this->workingDir.'/lib'),
             'classmap' => array($this->workingDir.'/src'),
         ));
-        $mainPackage->setRequires(array(new Link('z', 'a/a')));
+        $mainPackage->setRequires(array(
+            new Link('z', 'a/a'),
+            new Link('z', 'b/b')
+        ));
 
         $packages = array();
         $packages[] = $a = new Package('a/a', '1.0', '1.0');
@@ -993,6 +1034,9 @@ EOF;
             'classmap' => array('classmap'),
             'files' => array('test.php'),
         ));
+        $package->setRequires(array(
+            new Link('a', 'b/b')
+        ));
 
         $vendorPackage = new Package('b/b', '1.0', '1.0');
         $vendorPackage->setAutoload(array(