[Mac/GN] Add //build/config/mac/package_framework.py.

build/config/mac/package_framework.py

+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+
+# Packages a framework bundle by setting up symlinks for the "Current" version.
+# Usage: python /path/to/Foo.framework current_version
+
+def Main(args):
+  if len(args) != 3:
+    print >> sys.stderr, "Usage: %s /path/to/Something.framework A", (args[0],)
+    return 1
+
+  (framework, version) = args[1:]
+
+  # Find the name of the binary based on the part before the ".framework".
+  binary = os.path.basename(framework).split('.')[0]

[sdefresne, 2016/06/09 07:16:18]

nit: os.path.splitext(os.path.basename(framework))[0]

[Robert Sesek, 2016/06/09 14:25:18]

Done.

+
+  CURRENT = 'Current'
+  RESOURCES = 'Resources'
+  VERSIONS = 'Versions'
+
+  if not os.path.exists(os.path.join(framework, VERSIONS, version, binary)):
+    # Binary-less frameworks don't seem to contain symlinks (see e.g.
+    # chromium's out/Debug/org.chromium.Chromium.manifest/ bundle).
+    return 0
+
+  # Move into the framework directory to set the symlinks correctly.
+  pwd = os.getcwd()

[sdefresne, 2016/06/09 07:16:18]

If you want to be sure to restore the current working directory before returning
from the function, I would suggest using try/finally. However, since the current
working directory is only per application and this script just exit after
returning from main, I'm not even sure it is necessary to save the current
working directory.

Using try/finally would be something like:

pwd = os.getcwd()
try:
  os.chdir(framework)
  ...
  return 0
finally:
  os.chdir(pwd)

[Robert Sesek, 2016/06/09 14:25:18]

I just dropped the cwd reset because, as you say, it's local to the process and
it exits right after this.

+  os.chdir(framework)
+
+  # Set up the Current version.
+  _Relink(version, os.path.join(VERSIONS, CURRENT))
+
+  # Set up the root symlinks.
+  _Relink(os.path.join(VERSIONS, CURRENT, binary), binary)
+  _Relink(os.path.join(VERSIONS, CURRENT, RESOURCES), RESOURCES)
+
+  # The following directories are optional but should also be symlinked
+  # in the root.
+  EXTRA_DIRS = [
+      'Helpers',
+      'Internet Plug-Ins',
+      'Libraries',
+      'XPCServices',
+  ]
+  for extra_dir in EXTRA_DIRS:
+    extra_dir_target = os.path.join(VERSIONS, version, extra_dir)
+    if os.path.exists(extra_dir_target):
+      _Relink(extra_dir_target, extra_dir)
+
+  # Back to where we were before!
+  os.chdir(pwd)
+  return 0
+
+
+def _Relink(dest, link):
+  """Creates a symlink to |dest| named |link|. If |link| already exists,
+  it is overwritten."""
+  if os.path.lexists(link):
+    os.remove(link)
+  os.symlink(dest, link)
+
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv))