cleanup temporary download location when archiving

src/Composer/Package/Archiver/ArchiveManager.php

@@ -142,6 +142,13 @@ class ArchiveManager
         }
 
         // Create the archive
-        return $usableArchiver->archive($sourcePath, $target, $format, $package->getArchiveExcludes());
+        $archivePath = $usableArchiver->archive($sourcePath, $target, $format, $package->getArchiveExcludes());
+
+        //cleanup temporary download
+        if (!($package instanceof RootPackage)) {
+            $filesystem->removeDirectory($sourcePath);
+        }
+
+        return $archivePath;
     }
 }

tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php

@@ -49,6 +49,9 @@ class ArchiveManagerTest extends ArchiverTest
 
         $target = $this->getTargetName($package, 'tar');
         $this->assertFileExists($target);
+        
+        $tmppath = sys_get_temp_dir().'/composer_archiver/'.$this->manager->getPackageFilename($package);
+        $this->assertFileNotExists($tmppath);
 
         unlink($target);
     }