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# vim: set fileencoding=utf-8 :
#
# (C) 2006,2007 Guido Guenther <agx@sigxcpu.org>
"""provides some git repository related helpers"""
import subprocess
import os.path
class GitRepositoryError(Exception):
"""Exception thrown by GitRepository"""
pass
class GitRepository(object):
"""Represents a git repository at path"""
def __init__(self, path):
try:
os.stat(os.path.join(path,'.git'))
except:
raise GitRepositoryError
self.path = os.path.abspath(path)
def __check_path(self):
if os.getcwd() != self.path:
raise GitRepositoryError
def __git_getoutput(self, command, args=[]):
"""exec a git command and return the output"""
output = []
popen = subprocess.Popen(['git', command] + args, stdout=subprocess.PIPE)
while popen.poll() == None:
output += popen.stdout.readlines()
ret = popen.poll()
output += popen.stdout.readlines()
return output, ret
def has_branch(self, branch):
"""check if the repository has branch 'branch'"""
self.__check_path()
for line in self.__git_getoutput('branch')[0]:
if line.split(' ', 1)[1].strip() == branch:
return True
return False
def has_treeish(self, treeish):
"""check if the repository has the treeish object treeish"""
self.__check_path()
out, ret = self.__git_getoutput('ls-tree', [ treeish ])
return [ True, False ][ret != 0]
def get_branch(self):
"""on what branch is the current working copy"""
self.__check_path()
for line in self.__git_getoutput('branch')[0]:
if line.startswith('*'):
return line.split(' ', 1)[1].strip()
def is_clean(self):
"""does the repository contain any uncommitted modifications"""
self.__check_path()
clean_msg = 'nothing to commit'
out = self.__git_getoutput('status')[0]
if out[0].startswith('#') and out[1].strip().startswith(clean_msg):
ret = True
elif out[0].strip().startswith(clean_msg): # git << 1.5
ret = True
else:
ret = False
return (ret, "".join(out))
def index_files(self):
"""List files in the index"""
out, ret = self.__git_getoutput('ls-files')
if ret:
raise GitRepositoryError, "Error listing files %d" % ret
files = [ line.strip() for line in out ]
return files
def build_tag(format, version):
"""Generate a tag from a given format and a version"""
return format % dict(version=sanitize_version(version))
def sanitize_version(version):
"""sanitize a version so git accepts it as a tag"""
if ':' in version: # strip of any epochs
version = version.split(':', 1)[1]
return version.replace('~', '.')
# vim:et:ts=4:sw=4:
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