Rewrite update script in python.

script/bootstrap.py

@@ -52,8 +52,8 @@ def bootstrap_brightray(url):
 
 
 def update_atom_shell():
-  update = os.path.join(SOURCE_ROOT, 'script', 'update')
-  subprocess.check_call([update])
+  update = os.path.join(SOURCE_ROOT, 'script', 'update.py')
+  subprocess.check_call([sys.executable, update])
 
 
 if __name__ == '__main__':

script/update

@@ -1,14 +0,0 @@
-#!/bin/sh
-
-set -e
-
-cd "$(dirname "$0")/.."
-
-./script/update-frameworks.py
-./script/update-node.py --version v0.10.12
-
-gyp -f ninja --depth . atom.gyp \
-  -Icommon.gypi \
-  -Ivendor/brightray/brightray.gypi \
-  -Dtarget_arch=ia32 \
-  -Dlibrary=static_library

script/update.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import subprocess
+import sys
+
+from lib.util import *
+
+
+SOURCE_ROOT = os.path.dirname(os.path.dirname(__file__))
+NODE_VERSION = 'v0.10.12'
+
+
+def main():
+  os.chdir(SOURCE_ROOT)
+
+  update_frameworks_and_node(NODE_VERSION)
+  update_gyp()
+
+
+def update_frameworks_and_node(version):
+  uf = os.path.join(SOURCE_ROOT, 'script', 'update-frameworks.py')
+  un = os.path.join(SOURCE_ROOT, 'script', 'update-node.py')
+  subprocess.check_call([sys.executable, uf])
+  subprocess.check_call([sys.executable, un, '--version', version])
+
+
+def update_gyp():
+  subprocess.check_call(['gyp', '-f', 'ninja', '--depth', '.', 'atom.gyp',
+                         '-Icommon.gypi', '-Ivendor/brightray/brightray.gypi',
+                         '-Dtarget_arch=ia32', '-Dlibrary=static_library'])
+
+
+if __name__ == '__main__':
+  sys.exit(main())