Use reference also for manifest git

When running 'repo init --reference=<mirror>', the mirror will be
used for all projects except the manifest project. This is because
the _InitGitDir function uses the 'repo.reference' git config
value specified in the manifest git, which has no effect when
creating the manifest git as that value will be set after the git
has been successfully cloned.

Information about where the manifest git is located on the server
is only known when performing the 'repo init', so that information
has to be provided when cloning the git in order for it to set up
a proper mapping.

Change-Id: I47a2c8b3267a4065965058718ce1def4ecb34d5a
Signed-off-by: Chirayu Desai <cdesai@cyanogenmod.org>

project.py

@@ -1854,16 +1854,17 @@ class Project(object):
     if GitCommand(self, cmd).Wait() != 0:
       raise GitError('%s merge %s ' % (self.name, head))
 
-  def _InitGitDir(self):
+  def _InitGitDir(self, mirror_git=None):
     if not os.path.exists(self.gitdir):
       os.makedirs(self.gitdir)
       self.bare_git.init()
 
       mp = self.manifest.manifestProject
-      ref_dir = mp.config.GetString('repo.reference')
+      ref_dir = mp.config.GetString('repo.reference') or ''
 
-      if ref_dir:
+      if ref_dir or mirror_git:
-        mirror_git = os.path.join(ref_dir, self.name + '.git')
+        if not mirror_git:
+          mirror_git = os.path.join(ref_dir, self.name + '.git')
         repo_git = os.path.join(ref_dir, '.repo', 'projects',
                                 self.relpath + '.git')
 

subcmds/init.py

@@ -19,6 +19,15 @@ import platform
 import re
 import shutil
 import sys
+try:
+  # For python3
+  import urllib.parse
+except ImportError:
+  # For python2
+  import imp
+  import urlparse
+  urllib = imp.new_module('urllib')
+  urllib.parse = urlparse.urlparse
 
 from color import Coloring
 from command import InteractiveCommand, MirrorSafeCommand
@@ -135,7 +144,19 @@ to update the working directory files.
       if not opt.quiet:
         print('Get %s' % GitConfig.ForUser().UrlInsteadOf(opt.manifest_url),
               file=sys.stderr)
-      m._InitGitDir()
+
+      # The manifest project object doesn't keep track of the path on the
+      # server where this git is located, so let's save that here.
+      mirrored_manifest_git = None
+      if opt.reference:
+        manifest_git_path = urllib.parse(opt.manifest_url).path[1:]
+        mirrored_manifest_git = os.path.join(opt.reference, manifest_git_path)
+        if not mirrored_manifest_git.endswith(".git"):
+          mirrored_manifest_git += ".git"
+        if not os.path.exists(mirrored_manifest_git):
+          mirrored_manifest_git = os.path.join(opt.reference + '/.repo/manifests.git')
+
+      m._InitGitDir(mirror_git=mirrored_manifest_git)
 
       if opt.manifest_branch:
         m.revisionExpr = opt.manifest_branch