Add a new gclient-new-workdir script which clones an existing gclient working directory much like g…

gclient-new-workdir.py

Index: gclient-new-workdir.py
diff --git a/gclient-new-workdir.py b/gclient-new-workdir.py
new file mode 100755
index 0000000000000000000000000000000000000000..be4ce7944758094a435f9e2bae36e4ac8b6425d7
--- /dev/null
+++ b/gclient-new-workdir.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+# Copyright (c) 2013 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.
+#
+# Usage:
+#    gclient-new-workdir.py <repository> <new_workdir> [<branch>]
+#
+
+import os
+import shutil
+import sys
+
+def main(argv):
+  if len(argv) < 3:

[iannucci, 2013/11/04 21:40:29]

also check if not enough parameters? Shouldn't it be len(argv) != 3?

We should also assert that this script doesn't run on windows.

+    usage()
+    return 1
+
+  if not os.path.exists(argv[1]):
+    print("Repository does not exist: " + argv[1])
+    return 1
+
+  if os.path.exists(argv[2]):
+    print("New workdir already exists: " + argv[2])
+    return 1
+
+  repository = argv[1]
+  new_workdir = argv[2]

[iannucci, 2013/11/04 21:40:29]

Let's move these above the checks, so we don't have to index argv 6 times.

Also, all of the above should be in a function parse_options(argv) ->
(repository, new_workdir)

+
+  gclient = repository + os.sep + ".gclient"

[iannucci, 2013/11/04 21:40:29]

os.path.join(repository, '.gclient')

+  if not os.path.exists(gclient):
+    print("No .gclient file: " + gclient)
+
+  gclient_entries = repository + os.sep + ".gclient_entries"
+  if not os.path.exists(gclient_entries):
+    print("No .gclient_entries file: " + gclient_entries)
+
+  os.mkdir(new_workdir)
+  os.symlink(gclient, new_workdir + os.sep + ".gclient")
+  os.symlink(gclient_entries, new_workdir + os.sep + ".gclient_entries")
+
+  for root, dirs, files in os.walk(repository):
+    for name in dirs:
+      if name == ".git":
+        workdir = root.replace(repository, new_workdir, 1)
+        make_workdir(os.path.join(root, name), os.path.join(workdir, name))
+
+  return 0
+
+def make_workdir(repository, new_workdir):
+  print("Creating: " + new_workdir)
+  os.makedirs(new_workdir)
+  make_symlink(repository, new_workdir, "config")
+  make_symlink(repository, new_workdir, "refs")
+  if os.path.exists(repository + os.sep + "logs"):
+    os.makedirs(new_workdir + os.sep + "logs")
+  make_symlink(repository, new_workdir, "logs" + os.sep + "refs")
+  make_symlink(repository, new_workdir, "objects")
+  make_symlink(repository, new_workdir, "info")
+  make_symlink(repository, new_workdir, "hooks")
+  make_symlink(repository, new_workdir, "packed-refs")
+  make_symlink(repository, new_workdir, "remotes")
+  make_symlink(repository, new_workdir, "rr-cache")
+  make_symlink(repository, new_workdir, "svn")
+  shutil.copy2(repository + os.sep + "HEAD", new_workdir + os.sep + "HEAD")
+  before = os.getcwd()
+  os.chdir(new_workdir.rstrip(".git"))
+  os.system("git checkout -f")

[iannucci, 2013/11/04 21:40:29]

let's just use subprocess.check_call with the cwd parameter instead of chdir'ing

+  os.chdir(before)
+
+def make_symlink(repository, new_workdir, link):
+  if not os.path.exists(repository + os.sep + link):
+    return
+  os.symlink(repository + os.sep + link, new_workdir + os.sep + link)
+
+def usage():
+  print("gclient-new-workdir.py <repository> <new_workdir>")
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))