-#######->WARNING<-####### Directory structure changed, see commit message

If you use git-python as a submodule of your own project, which alters the sys.path to import it,
you will have to adjust your code to take the changed directory structure into consideration.

Previously, you would put the path
./git-python/lib

into your syspath. All modules moved one level up into the 'git' subdirectory, which means that the 'git-python' directory
now contains the 'git' root package. To allow git to be found, add ./git-python into your path.

To finalize your update, run the following commands

git submodule update --init --recursive

As there will be left-over directories, consider running git-clean

3 files changed, 1036 insertions, 0 deletions

diff --git a/git/repo/__init__.py b/git/repo/__init__.py
new file mode 100644
index 00000000..8902a254
--- /dev/null
+++ b/git/repo/__init__.py
@@ -0,0 +1,3 @@
+"""Initialize the Repo package"""
+
+from base import *
\ No newline at end of file
diff --git a/git/repo/base.py b/git/repo/base.py
new file mode 100644
index 00000000..e26da101
--- /dev/null
+++ b/git/repo/base.py
@@ -0,0 +1,753 @@
+# repo.py
+# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
+#
+# This module is part of GitPython and is released under
+# the BSD License: http://www.opensource.org/licenses/bsd-license.php
+
+from git.exc import InvalidGitRepositoryError, NoSuchPathError
+from git.cmd import Git
+from git.util import Actor
+from git.refs import *
+from git.index import IndexFile
+from git.objects import *
+from git.config import GitConfigParser
+from git.remote import Remote
+from git.db import (
+				GitCmdObjectDB, 
+				GitDB
+				)
+
+
+from gitdb.util import (
+							join,
+							isfile,
+							hex_to_bin
+						)
+
+from fun import (
+					rev_parse,
+					is_git_dir,
+					touch
+				)
+
+import os
+import sys
+import re
+
+DefaultDBType = GitDB
+if sys.version_info[1] < 5:		# python 2.4 compatiblity
+	DefaultDBType = GitCmdObjectDB
+# END handle python 2.4
+
+
+__all__ = ('Repo', )
+
+
+class Repo(object):
+	"""Represents a git repository and allows you to query references, 
+	gather commit information, generate diffs, create and clone repositories query
+	the log.
+	
+	The following attributes are worth using:
+	
+	'working_dir' is the working directory of the git command, wich is the working tree 
+	directory if available or the .git directory in case of bare repositories
+	
+	'working_tree_dir' is the working tree directory, but will raise AssertionError
+	if we are a bare repository.
+	
+	'git_dir' is the .git repository directoy, which is always set."""
+	DAEMON_EXPORT_FILE = 'git-daemon-export-ok'
+	__slots__ = ( "working_dir", "_working_tree_dir", "git_dir", "_bare", "git", "odb" )
+	
+	# precompiled regex
+	re_whitespace = re.compile(r'\s+')
+	re_hexsha_only = re.compile('^[0-9A-Fa-f]{40}$')
+	re_hexsha_shortened = re.compile('^[0-9A-Fa-f]{4,40}$')
+	re_author_committer_start = re.compile(r'^(author|committer)')
+	re_tab_full_line = re.compile(r'^\t(.*)$')
+	
+	# invariants
+	# represents the configuration level of a configuration file
+	config_level = ("system", "global", "repository")
+
+	def __init__(self, path=None, odbt = DefaultDBType):
+		"""Create a new Repo instance
+
+		:param path: is the path to either the root git directory or the bare git repo::
+
+			repo = Repo("/Users/mtrier/Development/git-python")
+			repo = Repo("/Users/mtrier/Development/git-python.git")
+			repo = Repo("~/Development/git-python.git")
+			repo = Repo("$REPOSITORIES/Development/git-python.git")
+		
+		:param odbt: Object DataBase type - a type which is constructed by providing 
+			the directory containing the database objects, i.e. .git/objects. It will
+			be used to access all object data
+		:raise InvalidGitRepositoryError:
+		:raise NoSuchPathError:
+		:return: git.Repo """
+		epath = os.path.abspath(os.path.expandvars(os.path.expanduser(path or os.getcwd())))
+
+		if not os.path.exists(epath):
+			raise NoSuchPathError(epath)
+
+		self.working_dir = None
+		self._working_tree_dir = None
+		self.git_dir = None
+		curpath = epath
+		
+		# walk up the path to find the .git dir
+		while curpath:
+			if is_git_dir(curpath):
+				self.git_dir = curpath
+				self._working_tree_dir = os.path.dirname(curpath)
+				break
+			gitpath = join(curpath, '.git')
+			if is_git_dir(gitpath):
+				self.git_dir = gitpath
+				self._working_tree_dir = curpath
+				break
+			curpath, dummy = os.path.split(curpath)
+			if not dummy:
+				break
+		# END while curpath
+		
+		if self.git_dir is None:
+		   raise InvalidGitRepositoryError(epath)
+
+		self._bare = False
+		try:
+			self._bare = self.config_reader("repository").getboolean('core','bare') 
+		except Exception:
+			# lets not assume the option exists, although it should
+			pass
+
+		# adjust the wd in case we are actually bare - we didn't know that 
+		# in the first place
+		if self._bare:
+			self._working_tree_dir = None
+		# END working dir handling
+		
+		self.working_dir = self._working_tree_dir or self.git_dir
+		self.git = Git(self.working_dir)
+		
+		# special handling, in special times
+		args = [join(self.git_dir, 'objects')]
+		if issubclass(odbt, GitCmdObjectDB):
+			args.append(self.git)
+		self.odb = odbt(*args)
+
+	def __eq__(self, rhs):
+		if isinstance(rhs, Repo):
+			return self.git_dir == rhs.git_dir
+		return False
+		
+	def __ne__(self, rhs):
+		return not self.__eq__(rhs)
+		
+	def __hash__(self):
+		return hash(self.git_dir)
+
+	def __repr__(self):
+		return "%s(%r)" % (type(self).__name__, self.git_dir)
+
+	# Description property
+	def _get_description(self):
+		filename = join(self.git_dir, 'description')
+		return file(filename).read().rstrip()
+
+	def _set_description(self, descr):
+		filename = join(self.git_dir, 'description')
+		file(filename, 'w').write(descr+'\n')
+
+	description = property(_get_description, _set_description,
+						   doc="the project's description")
+	del _get_description
+	del _set_description
+	
+	
+	
+	@property
+	def working_tree_dir(self):
+		""":return: The working tree directory of our git repository
+		:raise AssertionError: If we are a bare repository"""
+		if self._working_tree_dir is None:
+			raise AssertionError( "Repository at %r is bare and does not have a working tree directory" % self.git_dir )
+		return self._working_tree_dir
+	
+	@property
+	def bare(self):
+		""":return: True if the repository is bare"""
+		return self._bare
+
+	@property
+	def heads(self):
+		"""A list of ``Head`` objects representing the branch heads in
+		this repo
+
+		:return: ``git.IterableList(Head, ...)``"""
+		return Head.list_items(self)
+		
+	@property
+	def references(self):
+		"""A list of Reference objects representing tags, heads and remote references.
+		
+		:return: IterableList(Reference, ...)"""
+		return Reference.list_items(self)
+		
+	# alias for references
+	refs = references
+
+	# alias for heads
+	branches = heads
+	
+	@property
+	def index(self):
+		""":return: IndexFile representing this repository's index."""
+		return IndexFile(self)
+
+	@property
+	def head(self):
+		""":return: HEAD Object pointing to the current head reference"""
+		return HEAD(self,'HEAD')
+		
+	@property
+	def remotes(self):
+		"""A list of Remote objects allowing to access and manipulate remotes
+		:return: ``git.IterableList(Remote, ...)``"""
+		return Remote.list_items(self)
+		
+	def remote(self, name='origin'):
+		""":return: Remote with the specified name
+		:raise ValueError:  if no remote with such a name exists"""
+		return Remote(self, name)
+		
+	#{ Submodules
+		
+	@property
+	def submodules(self):
+		"""
+		:return: git.IterableList(Submodule, ...) of direct submodules
+			available from the current head"""
+		return Submodule.list_items(self)
+		
+	def submodule(self, name):
+		""" :return: Submodule with the given name 
+		:raise ValueError: If no such submodule exists"""
+		try:
+			return self.submodules[name]
+		except IndexError:
+			raise ValueError("Didn't find submodule named %r" % name)
+		# END exception handling
+		
+	def create_submodule(self, *args, **kwargs):
+		"""Create a new submodule
+		
+		:note: See the documentation of Submodule.add for a description of the 
+			applicable parameters
+		:return: created submodules"""
+		return Submodule.add(self, *args, **kwargs)
+		
+	def iter_submodules(self, *args, **kwargs):
+		"""An iterator yielding Submodule instances, see Traversable interface
+		for a description of args and kwargs
+		:return: Iterator"""
+		return RootModule(self).traverse(*args, **kwargs)
+		
+	def submodule_update(self, *args, **kwargs):
+		"""Update the submodules, keeping the repository consistent as it will 
+		take the previous state into consideration. For more information, please
+		see the documentation of RootModule.update"""
+		return RootModule(self).update(*args, **kwargs)
+		
+	#}END submodules
+
+	@property
+	def tags(self):
+		"""A list of ``Tag`` objects that are available in this repo
+		:return: ``git.IterableList(TagReference, ...)`` """
+		return TagReference.list_items(self)
+		
+	def tag(self,path):
+		""":return: TagReference Object, reference pointing to a Commit or Tag
+		:param path: path to the tag reference, i.e. 0.1.5 or tags/0.1.5 """
+		return TagReference(self, path)
+		
+	def create_head(self, path, commit='HEAD', force=False, logmsg=None ):
+		"""Create a new head within the repository. 
+		For more documentation, please see the Head.create method.
+		
+		:return: newly created Head Reference"""
+		return Head.create(self, path, commit, force, logmsg)
+		
+	def delete_head(self, *heads, **kwargs):
+		"""Delete the given heads
+		
+		:param kwargs: Additional keyword arguments to be passed to git-branch"""
+		return Head.delete(self, *heads, **kwargs)
+		
+	def create_tag(self, path, ref='HEAD', message=None, force=False, **kwargs):
+		"""Create a new tag reference.
+		For more documentation, please see the TagReference.create method.
+		
+		:return: TagReference object """
+		return TagReference.create(self, path, ref, message, force, **kwargs)
+		
+	def delete_tag(self, *tags):
+		"""Delete the given tag references"""
+		return TagReference.delete(self, *tags)
+		
+	def create_remote(self, name, url, **kwargs):
+		"""Create a new remote.
+		
+		For more information, please see the documentation of the Remote.create 
+		methods 
+		
+		:return: Remote reference"""
+		return Remote.create(self, name, url, **kwargs)
+		
+	def delete_remote(self, remote):
+		"""Delete the given remote."""
+		return Remote.remove(self, remote)
+		
+	def _get_config_path(self, config_level ):
+		# we do not support an absolute path of the gitconfig on windows , 
+		# use the global config instead
+		if sys.platform == "win32" and config_level == "system":
+			config_level = "global"
+			
+		if config_level == "system":
+			return "/etc/gitconfig"
+		elif config_level == "global":
+			return os.path.normpath(os.path.expanduser("~/.gitconfig"))
+		elif config_level == "repository":
+			return join(self.git_dir, "config")
+		
+		raise ValueError( "Invalid configuration level: %r" % config_level )
+			
+	def config_reader(self, config_level=None):
+		"""
+		:return:
+			GitConfigParser allowing to read the full git configuration, but not to write it
+			
+			The configuration will include values from the system, user and repository 
+			configuration files.
+			
+		:param config_level:
+			For possible values, see config_writer method
+			If None, all applicable levels will be used. Specify a level in case 
+			you know which exact file you whish to read to prevent reading multiple files for 
+			instance
+		:note: On windows, system configuration cannot currently be read as the path is 
+			unknown, instead the global path will be used."""
+		files = None
+		if config_level is None:
+			files = [ self._get_config_path(f) for f in self.config_level ]
+		else:
+			files = [ self._get_config_path(config_level) ]
+		return GitConfigParser(files, read_only=True)
+		
+	def config_writer(self, config_level="repository"):
+		"""
+		:return:
+			GitConfigParser allowing to write values of the specified configuration file level.
+			Config writers should be retrieved, used to change the configuration ,and written 
+			right away as they will lock the configuration file in question and prevent other's
+			to write it.
+			
+		:param config_level:
+			One of the following values
+			system = sytem wide configuration file
+			global = user level configuration file
+			repository = configuration file for this repostory only"""
+		return GitConfigParser(self._get_config_path(config_level), read_only = False)
+		
+	def commit(self, rev=None):
+		"""The Commit object for the specified revision
+		:param rev: revision specifier, see git-rev-parse for viable options.
+		:return: ``git.Commit``"""
+		if rev is None:
+			return self.active_branch.commit
+		else:
+			return self.rev_parse(str(rev)+"^0")
+		
+	def iter_trees(self, *args, **kwargs):
+		""":return: Iterator yielding Tree objects
+		:note: Takes all arguments known to iter_commits method"""
+		return ( c.tree for c in self.iter_commits(*args, **kwargs) )
+
+	def tree(self, rev=None):
+		"""The Tree object for the given treeish revision
+		Examples::
+	
+			  repo.tree(repo.heads[0])
+
+		:param rev: is a revision pointing to a Treeish ( being a commit or tree )
+		:return: ``git.Tree``
+			
+		:note:
+			If you need a non-root level tree, find it by iterating the root tree. Otherwise
+			it cannot know about its path relative to the repository root and subsequent 
+			operations might have unexpected results."""
+		if rev is None:
+			return self.active_branch.commit.tree
+		else:
+			return self.rev_parse(str(rev)+"^{tree}")
+
+	def iter_commits(self, rev=None, paths='', **kwargs):
+		"""A list of Commit objects representing the history of a given ref/commit
+
+		:parm rev:
+			revision specifier, see git-rev-parse for viable options.
+			If None, the active branch will be used.
+
+		:parm paths:
+			is an optional path or a list of paths to limit the returned commits to
+			Commits that do not contain that path or the paths will not be returned.
+		
+		:parm kwargs:
+			Arguments to be passed to git-rev-list - common ones are 
+			max_count and skip
+
+		:note: to receive only commits between two named revisions, use the 
+			"revA..revB" revision specifier
+
+		:return ``git.Commit[]``"""
+		if rev is None:
+			rev = self.active_branch
+		
+		return Commit.iter_items(self, rev, paths, **kwargs)
+
+	def _get_daemon_export(self):
+		filename = join(self.git_dir, self.DAEMON_EXPORT_FILE)
+		return os.path.exists(filename)
+
+	def _set_daemon_export(self, value):
+		filename = join(self.git_dir, self.DAEMON_EXPORT_FILE)
+		fileexists = os.path.exists(filename)
+		if value and not fileexists:
+			touch(filename)
+		elif not value and fileexists:
+			os.unlink(filename)
+
+	daemon_export = property(_get_daemon_export, _set_daemon_export,
+							 doc="If True, git-daemon may export this repository")
+	del _get_daemon_export
+	del _set_daemon_export
+
+	def _get_alternates(self):
+		"""The list of alternates for this repo from which objects can be retrieved
+
+		:return: list of strings being pathnames of alternates"""
+		alternates_path = join(self.git_dir, 'objects', 'info', 'alternates')
+
+		if os.path.exists(alternates_path):
+			try:
+				f = open(alternates_path)
+				alts = f.read()
+			finally:
+				f.close()
+			return alts.strip().splitlines()
+		else:
+			return list()
+
+	def _set_alternates(self, alts):
+		"""Sets the alternates
+
+		:parm alts:
+			is the array of string paths representing the alternates at which 
+			git should look for objects, i.e. /home/user/repo/.git/objects
+
+		:raise NoSuchPathError:
+		:note:
+			The method does not check for the existance of the paths in alts
+			as the caller is responsible."""
+		alternates_path = join(self.git_dir, 'objects', 'info', 'alternates') 
+		if not alts:
+			if isfile(alternates_path):
+				os.remove(alternates_path)
+		else:
+			try:
+				f = open(alternates_path, 'w')
+				f.write("\n".join(alts))
+			finally:
+				f.close()
+			# END file handling 
+		# END alts handling
+
+	alternates = property(_get_alternates, _set_alternates, doc="Retrieve a list of alternates paths or set a list paths to be used as alternates")
+
+	def is_dirty(self, index=True, working_tree=True, untracked_files=False):
+		"""
+		:return:
+			``True``, the repository is considered dirty. By default it will react
+			like a git-status without untracked files, hence it is dirty if the 
+			index or the working copy have changes."""
+		if self._bare:
+			# Bare repositories with no associated working directory are
+			# always consired to be clean.
+			return False
+		
+		# start from the one which is fastest to evaluate
+		default_args = ('--abbrev=40', '--full-index', '--raw')
+		if index: 
+			# diff index against HEAD
+			if isfile(self.index.path) and self.head.is_valid() and \
+				len(self.git.diff('HEAD', '--cached', *default_args)):
+				return True
+		# END index handling
+		if working_tree:
+			# diff index against working tree
+			if len(self.git.diff(*default_args)):
+				return True
+		# END working tree handling
+		if untracked_files:
+			if len(self.untracked_files):
+				return True
+		# END untracked files
+		return False
+		
+	@property
+	def untracked_files(self):
+		"""
+		:return:
+			list(str,...)
+			
+			Files currently untracked as they have not been staged yet. Paths 
+			are relative to the current working directory of the git command.
+			
+		:note:
+			ignored files will not appear here, i.e. files mentioned in .gitignore"""
+		# make sure we get all files, no only untracked directores
+		proc = self.git.status(untracked_files=True, as_process=True)
+		stream = iter(proc.stdout)
+		untracked_files = list()
+		for line in stream:
+			if not line.startswith("# Untracked files:"):
+				continue
+			# skip two lines
+			stream.next()
+			stream.next()
+			
+			for untracked_info in stream:
+				if not untracked_info.startswith("#\t"):
+					break
+				untracked_files.append(untracked_info.replace("#\t", "").rstrip())
+			# END for each utracked info line
+		# END for each line
+		return untracked_files
+
+	@property
+	def active_branch(self):
+		"""The name of the currently active branch.
+
+		:return: Head to the active branch"""
+		return self.head.reference
+			
+	def blame(self, rev, file):
+		"""The blame information for the given file at the given revision.
+
+		:parm rev: revision specifier, see git-rev-parse for viable options.
+		:return:
+			list: [git.Commit, list: [<line>]]
+			A list of tuples associating a Commit object with a list of lines that 
+			changed within the given commit. The Commit objects will be given in order
+			of appearance."""
+		data = self.git.blame(rev, '--', file, p=True)
+		commits = dict()
+		blames = list()
+		info = None
+
+		for line in data.splitlines(False):
+			parts = self.re_whitespace.split(line, 1)
+			firstpart = parts[0]
+			if self.re_hexsha_only.search(firstpart):
+				# handles 
+				# 634396b2f541a9f2d58b00be1a07f0c358b999b3 1 1 7		- indicates blame-data start
+				# 634396b2f541a9f2d58b00be1a07f0c358b999b3 2 2
+				digits = parts[-1].split(" ")
+				if len(digits) == 3:
+					info = {'id': firstpart}
+					blames.append([None, []])
+				# END blame data initialization
+			else:
+				m = self.re_author_committer_start.search(firstpart)
+				if m:
+					# handles: 
+					# author Tom Preston-Werner
+					# author-mail <tom@mojombo.com>
+					# author-time 1192271832
+					# author-tz -0700
+					# committer Tom Preston-Werner
+					# committer-mail <tom@mojombo.com>
+					# committer-time 1192271832
+					# committer-tz -0700  - IGNORED BY US
+					role = m.group(0)
+					if firstpart.endswith('-mail'):
+						info["%s_email" % role] = parts[-1]
+					elif firstpart.endswith('-time'):
+						info["%s_date" % role] = int(parts[-1])
+					elif role == firstpart:
+						info[role] = parts[-1]
+					# END distinguish mail,time,name
+				else:
+					# handle
+					# filename lib/grit.rb
+					# summary add Blob
+					# <and rest>
+					if firstpart.startswith('filename'):
+						info['filename'] = parts[-1]
+					elif firstpart.startswith('summary'):
+						info['summary'] = parts[-1]
+					elif firstpart == '':
+						if info:
+							sha = info['id']
+							c = commits.get(sha)
+							if c is None:
+								c = Commit(	 self, hex_to_bin(sha),
+											 author=Actor._from_string(info['author'] + ' ' + info['author_email']),
+											 authored_date=info['author_date'],
+											 committer=Actor._from_string(info['committer'] + ' ' + info['committer_email']),
+											 committed_date=info['committer_date'],
+											 message=info['summary'])
+								commits[sha] = c
+							# END if commit objects needs initial creation
+							m = self.re_tab_full_line.search(line)
+							text,  = m.groups()
+							blames[-1][0] = c
+							blames[-1][1].append( text )
+							info = None
+						# END if we collected commit info
+					# END distinguish filename,summary,rest
+				# END distinguish author|committer vs filename,summary,rest
+			# END distinguish hexsha vs other information
+		return blames
+
+	@classmethod
+	def init(cls, path=None, mkdir=True, **kwargs):
+		"""Initialize a git repository at the given path if specified
+
+		:param path:
+			is the full path to the repo (traditionally ends with /<name>.git)
+			or None in which case the repository will be created in the current 
+			working directory
+
+		:parm mkdir:
+			if specified will create the repository directory if it doesn't
+			already exists. Creates the directory with a mode=0755. 
+			Only effective if a path is explicitly given
+
+		:parm kwargs:
+			keyword arguments serving as additional options to the git-init command
+
+		:return: ``git.Repo`` (the newly created repo)"""
+
+		if mkdir and path and not os.path.exists(path):
+			os.makedirs(path, 0755)
+
+		# git command automatically chdir into the directory
+		git = Git(path)
+		output = git.init(**kwargs)
+		return Repo(path)
+
+	@classmethod
+	def _clone(cls, git, url, path, odb_default_type, **kwargs):
+		# special handling for windows for path at which the clone should be 
+		# created.
+		# tilde '~' will be expanded to the HOME no matter where the ~ occours. Hence
+		# we at least give a proper error instead of letting git fail
+		prev_cwd = None
+		prev_path = None
+		odbt = kwargs.pop('odbt', odb_default_type)
+		if os.name == 'nt':
+			if '~' in path:
+				raise OSError("Git cannot handle the ~ character in path %r correctly" % path)
+				
+			# on windows, git will think paths like c: are relative and prepend the 
+			# current working dir ( before it fails ). We temporarily adjust the working 
+			# dir to make this actually work
+			match = re.match("(\w:[/\\\])(.*)", path)
+			if match:
+				prev_cwd = os.getcwd()
+				prev_path = path
+				drive, rest_of_path = match.groups()
+				os.chdir(drive)
+				path = rest_of_path
+				kwargs['with_keep_cwd'] = True
+			# END cwd preparation 
+		# END windows handling 
+		
+		try:
+			git.clone(url, path, **kwargs)
+		finally:
+			if prev_cwd is not None:
+				os.chdir(prev_cwd)
+				path = prev_path
+			# END reset previous working dir
+		# END bad windows handling
+		
+		# our git command could have a different working dir than our actual 
+		# environment, hence we prepend its working dir if required
+		if not os.path.isabs(path) and git.working_dir:
+			path = join(git._working_dir, path)
+			
+		# adjust remotes - there may be operating systems which use backslashes, 
+		# These might be given as initial paths, but when handling the config file
+		# that contains the remote from which we were clones, git stops liking it
+		# as it will escape the backslashes. Hence we undo the escaping just to be 
+		# sure
+		repo = cls(os.path.abspath(path), odbt = odbt)
+		if repo.remotes:
+			repo.remotes[0].config_writer.set_value('url', repo.remotes[0].url.replace("\\\\", "\\").replace("\\", "/"))
+		# END handle remote repo
+		return repo
+
+	def clone(self, path, **kwargs):
+		"""Create a clone from this repository.
+		:param path:
+			is the full path of the new repo (traditionally ends with ./<name>.git).
+
+		:param kwargs:
+			odbt = ObjectDatabase Type, allowing to determine the object database
+			implementation used by the returned Repo instance
+			
+			All remaining keyword arguments are given to the git-clone command
+			
+		:return: ``git.Repo`` (the newly cloned repo)"""
+		return self._clone(self.git, self.git_dir, path, type(self.odb), **kwargs)
+
+	@classmethod
+	def clone_from(cls, url, to_path, **kwargs):
+		"""Create a clone from the given URL
+		:param url: valid git url, see http://www.kernel.org/pub/software/scm/git/docs/git-clone.html#URLS
+		:param to_path: Path to which the repository should be cloned to
+		:param kwargs: see the ``clone`` method
+		:return: Repo instance pointing to the cloned directory"""
+		return cls._clone(Git(os.getcwd()), url, to_path, GitCmdObjectDB, **kwargs)
+
+	def archive(self, ostream, treeish=None, prefix=None,  **kwargs):
+		"""Archive the tree at the given revision.
+		:parm ostream: file compatible stream object to which the archive will be written
+		:parm treeish: is the treeish name/id, defaults to active branch
+		:parm prefix: is the optional prefix to prepend to each filename in the archive
+		:parm kwargs:
+			Additional arguments passed to git-archive
+			NOTE: Use the 'format' argument to define the kind of format. Use 
+			specialized ostreams to write any format supported by python
+
+		:raise GitCommandError: in case something went wrong
+		:return: self"""
+		if treeish is None:
+			treeish = self.active_branch
+		if prefix and 'prefix' not in kwargs:
+			kwargs['prefix'] = prefix 
+		kwargs['output_stream'] = ostream
+		
+		self.git.archive(treeish, **kwargs)
+		return self
+	
+	rev_parse = rev_parse
+		
+	def __repr__(self):
+		return '<git.Repo "%s">' % self.git_dir
diff --git a/git/repo/fun.py b/git/repo/fun.py
new file mode 100644
index 00000000..7a5984d3
--- /dev/null
+++ b/git/repo/fun.py
@@ -0,0 +1,280 @@
+"""Package with general repository related functions"""
+import os
+from gitdb.exc import BadObject
+from git.refs import SymbolicReference
+from git.objects import Object
+from gitdb.util import (
+							join,
+							isdir, 
+							isfile,
+							hex_to_bin, 
+							bin_to_hex
+						)
+from string import digits
+
+__all__ = ('rev_parse', 'is_git_dir', 'touch')
+
+def touch(filename):
+	fp = open(filename, "a")
+	fp.close()
+
+def is_git_dir(d):
+	""" This is taken from the git setup.c:is_git_directory
+	function."""
+	if isdir(d) and \
+			isdir(join(d, 'objects')) and \
+			isdir(join(d, 'refs')):
+		headref = join(d, 'HEAD')
+		return isfile(headref) or \
+				(os.path.islink(headref) and
+				os.readlink(headref).startswith('refs'))
+	return False
+
+
+def short_to_long(odb, hexsha):
+	""":return: long hexadecimal sha1 from the given less-than-40 byte hexsha
+		or None if no candidate could be found.
+	:param hexsha: hexsha with less than 40 byte"""
+	try:
+		return bin_to_hex(odb.partial_to_complete_sha_hex(hexsha))
+	except BadObject:
+		return None
+	# END exception handling
+	
+	
+def name_to_object(repo, name, return_ref=False):
+	"""
+	:return: object specified by the given name, hexshas ( short and long )
+		as well as references are supported
+	:param return_ref: if name specifies a reference, we will return the reference
+		instead of the object. Otherwise it will raise BadObject
+	"""
+	hexsha = None
+	
+	# is it a hexsha ? Try the most common ones, which is 7 to 40
+	if repo.re_hexsha_shortened.match(name):
+		if len(name) != 40:
+			# find long sha for short sha
+			hexsha = short_to_long(repo.odb, name)
+		else:
+			hexsha = name
+		# END handle short shas
+	else:
+		for base in ('%s', 'refs/%s', 'refs/tags/%s', 'refs/heads/%s', 'refs/remotes/%s', 'refs/remotes/%s/HEAD'):
+			try:
+				hexsha = SymbolicReference.dereference_recursive(repo, base % name)
+				if return_ref:
+					return SymbolicReference(repo, base % name)
+				#END handle symbolic ref
+				break
+			except ValueError:
+				pass
+		# END for each base
+	# END handle hexsha
+
+	# didn't find any ref, this is an error
+	if return_ref:
+		raise BadObject("Couldn't find reference named %r" % name)
+	#END handle return ref
+
+	# tried everything ? fail
+	if hexsha is None:
+		raise BadObject(name)
+	# END assert hexsha was found
+	
+	return Object.new_from_sha(repo, hex_to_bin(hexsha))
+
+def deref_tag(tag):
+	"""Recursively dereerence a tag and return the resulting object"""
+	while True:
+		try:
+			tag = tag.object
+		except AttributeError:
+			break
+	# END dereference tag
+	return tag
+
+def to_commit(obj):
+	"""Convert the given object to a commit if possible and return it"""
+	if obj.type == 'tag':
+		obj = deref_tag(obj)
+		
+	if obj.type != "commit":
+		raise ValueError("Cannot convert object %r to type commit" % obj)
+	# END verify type
+	return obj
+
+def rev_parse(repo, rev):
+	"""
+	:return: Object at the given revision, either Commit, Tag, Tree or Blob
+	:param rev: git-rev-parse compatible revision specification, please see
+		http://www.kernel.org/pub/software/scm/git/docs/git-rev-parse.html
+		for details
+	:note: Currently there is no access to the rev-log, rev-specs may only contain
+		topological tokens such ~ and ^.
+	:raise BadObject: if the given revision could not be found
+	:raise ValueError: If rev couldn't be parsed
+	:raise IndexError: If invalid reflog index is specified"""
+	
+	# colon search mode ?
+	if rev.startswith(':/'):
+		# colon search mode
+		raise NotImplementedError("commit by message search ( regex )")
+	# END handle search
+	
+	obj = None
+	ref = None
+	output_type = "commit"
+	start = 0
+	parsed_to = 0
+	lr = len(rev)
+	while start < lr:
+		if rev[start] not in "^~:@":
+			start += 1
+			continue
+		# END handle start
+		
+		token = rev[start]
+		
+		if obj is None:
+			# token is a rev name
+			if start == 0:
+				ref = repo.head.ref
+			else:
+				if token == '@':
+					ref = name_to_object(repo, rev[:start], return_ref=True)
+				else:
+					obj = name_to_object(repo, rev[:start])
+				#END handle token
+			#END handle refname
+			
+			if ref is not None:
+				obj = ref.commit
+			#END handle ref
+		# END initialize obj on first token
+		
+		
+		start += 1
+		
+		# try to parse {type}
+		if start < lr and rev[start] == '{':
+			end = rev.find('}', start)
+			if end == -1:
+				raise ValueError("Missing closing brace to define type in %s" % rev)
+			output_type = rev[start+1:end]	# exclude brace
+			
+			# handle type 
+			if output_type == 'commit':
+				pass # default
+			elif output_type == 'tree':
+				try:
+					obj = to_commit(obj).tree
+				except (AttributeError, ValueError):
+					pass	# error raised later
+				# END exception handling
+			elif output_type in ('', 'blob'):
+				if obj.type == 'tag':
+					obj = deref_tag(obj)
+				else:
+					# cannot do anything for non-tags
+					pass
+				# END handle tag
+			elif token == '@':
+				# try single int
+				assert ref is not None, "Requre Reference to access reflog"
+				revlog_index = None
+				try:
+					# transform reversed index into the format of our revlog
+					revlog_index = -(int(output_type)+1)
+				except ValueError:
+					# TODO: Try to parse the other date options, using parse_date
+					# maybe
+					raise NotImplementedError("Support for additional @{...} modes not implemented")
+				#END handle revlog index
+				
+				try:
+					entry = ref.log_entry(revlog_index)
+				except IndexError:
+					raise IndexError("Invalid revlog index: %i" % revlog_index)
+				#END handle index out of bound
+				
+				obj = Object.new_from_sha(repo, hex_to_bin(entry.newhexsha))
+				
+				# make it pass the following checks
+				output_type = None
+			else:
+				raise ValueError("Invalid output type: %s ( in %s )"  % (output_type, rev))
+			# END handle output type
+			
+			# empty output types don't require any specific type, its just about dereferencing tags
+			if output_type and obj.type != output_type:
+				raise ValueError("Could not accomodate requested object type %r, got %s" % (output_type, obj.type))
+			# END verify ouput type
+			
+			start = end+1					# skip brace
+			parsed_to = start
+			continue
+		# END parse type
+		
+		# try to parse a number
+		num = 0
+		if token != ":":
+			found_digit = False
+			while start < lr:
+				if rev[start] in digits:
+					num = num * 10 + int(rev[start])
+					start += 1
+					found_digit = True
+				else:
+					break
+				# END handle number
+			# END number parse loop
+			
+			# no explicit number given, 1 is the default
+			# It could be 0 though 
+			if not found_digit:
+				num = 1
+			# END set default num
+		# END number parsing only if non-blob mode
+		
+		
+		parsed_to = start
+		# handle hiererarchy walk
+		try:
+			if token == "~":
+				obj = to_commit(obj)
+				for item in xrange(num):
+					obj = obj.parents[0]
+				# END for each history item to walk
+			elif token == "^":
+				obj = to_commit(obj)
+				# must be n'th parent
+				if num:
+					obj = obj.parents[num-1]
+			elif token == ":":
+				if obj.type != "tree":
+					obj = obj.tree
+				# END get tree type
+				obj = obj[rev[start:]]
+				parsed_to = lr
+			else:
+				raise ValueError("Invalid token: %r" % token)
+			# END end handle tag
+		except (IndexError, AttributeError):
+			raise BadObject("Invalid Revision in %s" % rev)
+		# END exception handling
+	# END parse loop
+	
+	# still no obj ? Its probably a simple name
+	if obj is None:
+		obj = name_to_object(repo, rev)
+		parsed_to = lr
+	# END handle simple name
+	
+	if obj is None:
+		raise ValueError("Revision specifier could not be parsed: %s" % rev)
+
+	if parsed_to != lr:
+		raise ValueError("Didn't consume complete rev spec %s, consumed part: %s" % (rev, rev[:parsed_to]))
+	
+	return obj