Set core.bare to true on mirror repositories

When creating a mirror repository we will always be using a bare
repository.  Setting $GIT_DIR/config to have core.bare = true is
reasonable and helps Git to recognize the environment it is in.

Signed-off-by: Shawn O. Pearce <sop@google.com>

command.py

@@ -114,3 +114,8 @@ class PagedCommand(Command):
   """Command which defaults to output in a pager, as its
      display tends to be larger than one screen full.
   """
+
+class MirrorSafeCommand(object):
+  """Command permits itself to run within a mirror,
+     and does not require a working directory.
+  """

error.py

@@ -17,6 +17,10 @@ class ManifestParseError(Exception):
   """Failed to parse the manifest file.
   """
 
+class ManifestInvalidRevisionError(Exception):
+  """The revision value in a project is incorrect.
+  """
+
 class EditorError(Exception):
   """Unspecified error from the user's text editor.
   """

main.py

@@ -27,8 +27,11 @@ import os
 import re
 import sys
 
-from command import InteractiveCommand, PagedCommand
+from command import InteractiveCommand
+from command import MirrorSafeCommand
+from command import PagedCommand
 from editor import Editor
+from error import ManifestInvalidRevisionError
 from error import NoSuchProjectError
 from error import RepoChangedException
 from manifest import Manifest
@@ -45,6 +48,9 @@ global_options.add_option('-p', '--paginate',
 global_options.add_option('--no-pager',
                           dest='no_pager', action='store_true',
                           help='disable the pager')
+global_options.add_option('--version',
+                          dest='show_version', action='store_true',
+                          help='display this version of repo')
 
 class _Repo(object):
   def __init__(self, repodir):
@@ -68,6 +74,13 @@ class _Repo(object):
       argv = []
     gopts, gargs = global_options.parse_args(glob)
 
+    if gopts.show_version:
+      if name == 'help':
+        name = 'version'
+      else:
+        print >>sys.stderr, 'fatal: invalid usage of --version'
+        sys.exit(1)
+
     try:
       cmd = self.commands[name]
     except KeyError:
@@ -80,6 +93,12 @@ class _Repo(object):
     cmd.manifest = Manifest(cmd.repodir)
     Editor.globalConfig = cmd.manifest.globalConfig
 
+    if not isinstance(cmd, MirrorSafeCommand) and cmd.manifest.IsMirror:
+      print >>sys.stderr, \
+            "fatal: '%s' requires a working directory"\
+            % name
+      sys.exit(1)
+
     if not gopts.no_pager and not isinstance(cmd, InteractiveCommand):
       config = cmd.manifest.globalConfig
       if gopts.pager:
@@ -94,6 +113,9 @@ class _Repo(object):
     copts, cargs = cmd.OptionParser.parse_args(argv)
     try:
       cmd.Execute(copts, cargs)
+    except ManifestInvalidRevisionError, e:
+      print >>sys.stderr, 'error: %s' % str(e)
+      sys.exit(1)
     except NoSuchProjectError, e:
       if e.name:
         print >>sys.stderr, 'error: project %s not found' % e.name

project.py

@@ -25,6 +25,7 @@ from color import Coloring
 from git_command import GitCommand
 from git_config import GitConfig, IsId
 from error import GitError, ImportError, UploadError
+from error import ManifestInvalidRevisionError
 from remote import Remote
 
 HEAD    = 'HEAD'
@@ -357,7 +358,7 @@ class Project(object):
       else: f_status = '-'
 
       if i and i.src_path:
-        line = ' %s%s\t%s => (%s%%)' % (i_status, f_status,
+        line = ' %s%s\t%s => %s (%s%%)' % (i_status, f_status,
                                         i.src_path, p, i.level)
       else:
         line = ' %s%s\t%s' % (i_status, f_status, p)
@@ -528,7 +529,6 @@ class Project(object):
       return False
 
     if self.worktree:
-      self._RepairAndroidImportErrors()
       self._InitMRef()
     else:
       self._InitMirrorHead()
@@ -545,30 +545,6 @@ class Project(object):
     for file in self.copyfiles:
       file._Copy()
 
-  def _RepairAndroidImportErrors(self):
-    if self.name in ['platform/external/iptables',
-                     'platform/external/libpcap',
-                     'platform/external/tcpdump',
-                     'platform/external/webkit',
-                     'platform/system/wlan/ti']:
-      # I hate myself for doing this...
-      #
-      # In the initial Android 1.0 release these projects were
-      # shipped, some users got them, and then the history had
-      # to be rewritten to correct problems with their imports.
-      # The 'android-1.0' tag may still be pointing at the old
-      # history, so we need to drop the tag and fetch it again.
-      #
-      try:
-        remote = self.GetRemote(self.remote.name)
-        relname = remote.ToLocal(R_HEADS + 'release-1.0')
-        tagname = R_TAGS + 'android-1.0'
-        if self._revlist(not_rev(relname), tagname):
-          cmd = ['fetch', remote.name, '+%s:%s' % (tagname, tagname)]
-          GitCommand(self, cmd, bare = True).Wait()
-      except GitError:
-        pass
-
   def Sync_LocalHalf(self):
     """Perform only the local IO portion of the sync process.
        Network access is not required.
@@ -582,6 +558,12 @@ class Project(object):
 
     rem = self.GetRemote(self.remote.name)
     rev = rem.ToLocal(self.revision)
+    try:
+      self.bare_git.rev_parse('--verify', '%s^0' % rev)
+    except GitError:
+      raise ManifestInvalidRevisionError(
+        'revision %s in %s not found' % (self.revision, self.name))
+
     branch = self.CurrentBranch
 
     if branch is None:
@@ -770,7 +752,8 @@ class Project(object):
     """
     cb = self.CurrentBranch
     kill = []
-    for name in self._allrefs.keys():
+    left = self._allrefs
+    for name in left.keys():
       if name.startswith(R_HEADS):
         name = name[len(R_HEADS):]
         if cb is None or name != cb:
@@ -783,14 +766,12 @@ class Project(object):
       self.work_git.DetachHead(HEAD)
       kill.append(cb)
 
-    deleted = set()
     if kill:
       try:
         old = self.bare_git.GetHead()
       except GitError:
         old = 'refs/heads/please_never_use_this_as_a_branch_name'
 
-      rm_re = re.compile(r"^Deleted branch (.*)\.$")
       try:
         self.bare_git.DetachHead(rev)
 
@@ -802,14 +783,12 @@ class Project(object):
         b.Wait()
       finally:
         self.bare_git.SetHead(old)
+        left = self._allrefs
 
-      for line in b.stdout.split("\n"):
-        m = rm_re.match(line)
-        if m:
-          deleted.add(m.group(1))
-
-      if deleted:
+      for branch in kill:
+        if (R_HEADS + branch) not in left:
           self.CleanPublishedCache()
+          break
 
     if cb and cb not in kill:
       kill.append(cb)
@@ -817,7 +796,7 @@ class Project(object):
 
     kept = []
     for branch in kill:
-      if branch not in deleted:
+      if (R_HEADS + branch) in left:
         branch = self.GetBranch(branch)
         base = branch.LocalMerge
         if not base:
@@ -872,6 +851,10 @@ class Project(object):
     if not os.path.exists(self.gitdir):
       os.makedirs(self.gitdir)
       self.bare_git.init()
+
+      if self.manifest.IsMirror:
+        self.config.SetString('core.bare', 'true')
+      else:
         self.config.SetString('core.bare', None)
 
       hooks = self._gitdir_path('hooks')

subcmds/forall.py

@@ -17,9 +17,9 @@ import re
 import os
 import sys
 import subprocess
-from command import Command
+from command import Command, MirrorSafeCommand
 
-class Forall(Command):
+class Forall(Command, MirrorSafeCommand):
   common = False
   helpSummary = "Run a shell command in each project"
   helpUsage = """
@@ -30,10 +30,22 @@ Executes the same shell command in each project.
 
 Environment
 -----------
-pwd is the project's working directory.
+pwd is the project's working directory.  If the current client is
+a mirror client, then pwd is the Git repository.
 
 REPO_PROJECT is set to the unique name of the project.
 
+REPO_PATH is the path relative the the root of the client.
+
+REPO_REMOTE is the name of the remote system from the manifest.
+
+REPO_LREV is the name of the revision from the manifest, translated
+to a local tracking branch.  If you need to pass the manifest
+revision to a locally executed git command, use REPO_LREV.
+
+REPO_RREV is the name of the revision from the manifest, exactly
+as written in the manifest.
+
 shell positional arguments ($1, $2, .., $#) are set to any arguments
 following <command>.
 
@@ -66,13 +78,26 @@ not redirected.
       cmd.append(cmd[0])
     cmd.extend(opt.command[1:])
 
+    mirror = self.manifest.IsMirror
     rc = 0
     for project in self.GetProjects(args):
       env = dict(os.environ.iteritems())
       env['REPO_PROJECT'] = project.name
+      env['REPO_PATH'] = project.relpath
+      env['REPO_REMOTE'] = project.remote.name
+      env['REPO_LREV'] = project\
+        .GetRemote(project.remote.name)\
+        .ToLocal(project.revision)
+      env['REPO_RREV'] = project.revision
+
+      if mirror:
+        env['GIT_DIR'] = project.gitdir
+        cwd = project.gitdir
+      else:
+        cwd = project.worktree
 
       p = subprocess.Popen(cmd,
-                           cwd = project.worktree,
+                           cwd = cwd,
                            shell = shell,
                            env = env)
       r = p.wait()

subcmds/help.py

@@ -17,9 +17,9 @@ import sys
 from formatter import AbstractFormatter, DumbWriter
 
 from color import Coloring
-from command import PagedCommand
+from command import PagedCommand, MirrorSafeCommand
 
-class Help(PagedCommand):
+class Help(PagedCommand, MirrorSafeCommand):
   common = False
   helpSummary = "Display detailed help on a command"
   helpUsage = """

subcmds/init.py

@@ -17,12 +17,12 @@ import os
 import sys
 
 from color import Coloring
-from command import InteractiveCommand
+from command import InteractiveCommand, MirrorSafeCommand
 from error import ManifestParseError
 from remote import Remote
 from git_command import git, MIN_GIT_VERSION
 
-class Init(InteractiveCommand):
+class Init(InteractiveCommand, MirrorSafeCommand):
   common = True
   helpSummary = "Initialize repo in the current directory"
   helpUsage = """

subcmds/sync.py

@@ -19,11 +19,11 @@ import subprocess
 import sys
 
 from git_command import GIT
-from command import Command
+from command import Command, MirrorSafeCommand
 from error import RepoChangedException, GitError
 from project import R_HEADS
 
-class Sync(Command):
+class Sync(Command, MirrorSafeCommand):
   common = True
   helpSummary = "Update working tree to the latest revision"
   helpUsage = """

subcmds/version.py

@@ -0,0 +1,35 @@
+#
+# Copyright (C) 2009 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+from command import Command, MirrorSafeCommand
+from git_command import git
+from project import HEAD
+
+class Version(Command, MirrorSafeCommand):
+  common = False
+  helpSummary = "Display the version of repo"
+  helpUsage = """
+%prog
+"""
+
+  def Execute(self, opt, args):
+    rp = self.manifest.repoProject
+    rem = rp.GetRemote(rp.remote.name)
+
+    print 'repo version %s' % rp.work_git.describe(HEAD)
+    print '       (from %s)' % rem.url
+    print git.version().strip()
+    print 'Python %s' % sys.version