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# vim: set fileencoding=utf-8 :
#
# (C) 2011 Guido Guenther <agx@sigxcpu.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Git fast import class"""
import subprocess
import time
from gbp.errors import GbpError
class FastImport(object):
"""Add data to a git repository using I{git fast-import}"""
_bufsize = 1024
m_regular = 644
m_exec = 755
m_symlink = 120000
def __init__(self, repo):
"""
@param repo: the git repository L{FastImport} acts on
@type repo: L{GitRepository}
"""
self._repo = repo
try:
self._fi = subprocess.Popen([ 'git', 'fast-import', '--quiet'],
stdin=subprocess.PIPE, cwd=repo.path)
self._out = self._fi.stdin
except OSError as err:
raise GbpError("Error spawning git fast-import: %s" % err)
except ValueError as err:
raise GbpError(
"Invalid argument when spawning git fast-import: %s" % err)
def _do_data(self, fd, size):
self._out.write("data %s\n" % size)
while True:
data = fd.read(self._bufsize)
self._out.write(data)
if len(data) != self._bufsize:
break
self._out.write("\n")
def _do_file(self, filename, mode, fd, size):
name = "/".join(filename.split('/')[1:])
self._out.write("M %d inline %s\n" % (mode, name))
self._do_data(fd, size)
def add_file(self, filename, fd, size, mode=m_regular):
"""
Add a file
@param filename: the name of the file to add
@type filename: C{str}
@param fd: stream to read data from
@type fd: C{File} like object
@param size: size of the file to add
@type size: C{int}
@param mode: file mode, default is L{FastImport.m_regular}.
@type mode: C{int}
"""
self._do_file(filename, mode, fd, size)
def add_symlink(self, linkname, linktarget):
"""
Add a symlink
@param linkname: the symbolic link's name
@param linkname: C{str}
@param linktarget: the target the symlink points to
@type linktarget: C{str}
"""
self._out.write("M %d inline %s\n" % (self.m_symlink, linkname))
self._out.write("data %s\n" % len(linktarget))
self._out.write("%s\n" % linktarget)
def start_commit(self, branch, committer, msg):
"""
Start a fast import commit
@param branch: branch to commit on
@type branch: C{str}
@param committer: the committer information
@type committer: L{GitModifier}
@param msg: the commit message
@type msg: C{str}
"""
length = len(msg)
if not committer.date:
committer.date = "%d %s" % (time.time(),
time.strftime("%z"))
if self._repo.has_branch(branch):
from_ = "from refs/heads/%(branch)s^0\n"
else:
from_ = ''
self._out.write("""commit refs/heads/%(branch)s
committer %(name)s <%(email)s> %(time)s
data %(length)s
%(msg)s%(from)s""" %
{ 'branch': branch,
'name': committer.name,
'email': committer.email,
'time': committer.date,
'length': length,
'msg': msg,
'from': from_,
})
def deleteall(self):
"""
Issue I{deleteall} to fastimport so we start from a empty tree
"""
self._out.write("deleteall\n")
def close(self):
"""
Close fast-import issuing all pending actions
"""
if self._out:
self._out.close()
if self._fi:
self._fi.wait()
def __del__(self):
self.close()
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