Rewrite update-frameworks script in python.

script/update-frameworks.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+import sys
+import os
+
+from lib.util import *
+
+
+SOURCE_ROOT = os.path.dirname(os.path.dirname(__file__))
+FRAMEWORKS_URL='https://gh-contractor-zcbenz.s3.amazonaws.com/frameworks'
+
+
+def main():
+  os.chdir(SOURCE_ROOT)
+  safe_mkdir('frameworks')
+  download_and_unzip('Quincy')
+  download_and_unzip('Sparkle')
+
+
+def download_and_unzip(framework):
+  zip_path = download_framework(framework)
+  if zip_path:
+    extract_zip(zip_path, 'frameworks')
+
+
+def download_framework(framework):
+  framework_path = os.path.join('frameworks', framework) + '.framework'
+  if os.path.exists(framework_path):
+    return
+
+  filename = framework + '.framework.zip'
+  url = FRAMEWORKS_URL + '/' + filename
+  download_dir = tempdir(prefix='atom-shell-')
+  path = os.path.join(download_dir, filename)
+
+  download('Download ' + framework, url, path)
+  return path
+
+
+if __name__ == '__main__':
+  sys.exit(main())