Improve fetching single files via bitbucket API.

The former implementation used the 'src' endpoint which returned some meta data as well.
This has been replaced with the 'raw' endpoint which does not return the meta data and does not need an extra JSON decode step.

src/Composer/Repository/Vcs/BitbucketDriver.php

@@ -166,18 +166,14 @@ abstract class BitbucketDriver extends VcsDriver
         }
 
         $resource = sprintf(
-            'https://api.bitbucket.org/1.0/repositories/%s/%s/src/%s/%s',
+            'https://api.bitbucket.org/1.0/repositories/%s/%s/raw/%s/%s',
             $this->owner,
             $this->repository,
             $identifier,
             $file
         );
-        $fileData = JsonFile::parseJson($this->getContents($resource), $resource);
-        if (!is_array($fileData) || ! array_key_exists('data', $fileData)) {
-            return null;
-        }
 
-        return $fileData['data'];
+        return $this->getContents($resource);
     }
 
     /**

tests/Composer/Test/Repository/Vcs/GitBitbucketDriverTest.php

@@ -128,7 +128,7 @@ class GitBitbucketDriverTest extends TestCase
                 ),
                 array(
                     $this->originUrl,
-                    'https://api.bitbucket.org/1.0/repositories/user/repo/src/master/composer.json',
+                    'https://api.bitbucket.org/1.0/repositories/user/repo/raw/master/composer.json',
                     false
                 ),
                 array(
@@ -142,7 +142,7 @@ class GitBitbucketDriverTest extends TestCase
                 '{"name": "master"}',
                 '{"values":[{"name":"1.0.1","target":{"hash":"9b78a3932143497c519e49b8241083838c8ff8a1"}},{"name":"1.0.0","target":{"hash":"d3393d514318a9267d2f8ebbf463a9aaa389f8eb"}}]}',
                 '{"values":[{"name":"master","target":{"hash":"937992d19d72b5116c3e8c4a04f960e5fa270b22"}}]}',
-                '{"node": "937992d19d72", "path": "composer.json", "data": "{\n  \"name\": \"user/repo\",\n  \"description\": \"test repo\",\n  \"license\": \"GPL\",\n  \"authors\": [\n    {\n      \"name\": \"Name\",\n      \"email\": \"local@domain.tld\"\n    }\n  ],\n  \"require\": {\n    \"creator/package\": \"^1.0\"\n  },\n  \"require-dev\": {\n    \"phpunit/phpunit\": \"~4.8\"\n  }\n}\n", "size": 269}',
+                '{"name": "user/repo","description": "test repo","license": "GPL","authors": [{"name": "Name","email": "local@domain.tld"}],"require": {"creator/package": "^1.0"},"require-dev": {"phpunit/phpunit": "~4.8"}}',
                 '{"node": "937992d19d72", "files": [{"type": "modified", "file": "path/to/file"}], "raw_author": "User <local@domain.tld>", "utctimestamp": "2016-05-17 11:19:52+00:00", "author": "user", "timestamp": "2016-05-17 13:19:52", "raw_node": "937992d19d72b5116c3e8c4a04f960e5fa270b22", "parents": ["71e195a33361"], "branch": "master", "message": "Commit message\n", "revision": null, "size": -1}'
             );