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# Copyright (C) 2011-2012 Codethink Limited
#
# 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; version 2 of the License.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import logging
import urlparse
import binascii
import morphlib
import os
import cliapp
class NoMorphs(Exception):
def __init__(self, repo, ref):
Exception.__init__(self,
'Cannot find any morpologies at %s:%s' %
(repo, ref))
class TooManyMorphs(Exception):
def __init__(self, repo, ref, morphs):
Exception.__init__(self,
'Too many morphologies at %s:%s: %s' %
(repo, ref, ', '.join(morphs)))
class InvalidTreeish(cliapp.AppException):
def __init__(self, repo, ref):
Exception.__init__(self,
'%s is an invalid reference for repo %s' %
(ref,repo))
class Treeish:
def __init__(self, repo, ref, msg=logging.debug):
self.repo = repo
self.msg = msg
self.sha1 = None
self.ref = None
self._resolve_ref(ref)
def _resolve_ref(self, ref):
ex = morphlib.execute.Execute(self.repo, self.msg)
try:
refs = ex.runv(['git', 'show-ref', ref]).split()
binascii.unhexlify(refs[0]) #Valid hex?
self.sha1 = refs[0]
self.ref = refs[1]
except morphlib.execute.CommandFailure:
self._is_sha(ref)
def _is_sha(self, ref):
if len(ref)!=40:
raise InvalidTreeish(self.repo,ref)
try:
binascii.unhexlify(ref)
ex = morphlib.execute.Execute(self.repo, self.msg)
ex.runv(['git', 'rev-list', '--no-walk', ref])
self.sha1=ref
except (TypeError, morphlib.execute.CommandFailure):
raise InvalidTreeish(self.repo,ref)
def export_sources(treeish, tar_filename):
'''Export the contents of a specific commit into a compressed tarball.'''
ex = morphlib.execute.Execute('.', msg=logging.debug)
ex.runv(['git', 'archive', '-o', tar_filename, '--remote', treeish.repo,
treeish.sha1])
def get_morph_text(treeish, filename):
'''Return a morphology from a git repository.'''
ex = morphlib.execute.Execute(treeish.repo, msg=logging.debug)
return ex.runv(['git', 'cat-file', 'blob', '%s:%s'
% (treeish.sha1, filename)])
def extract_bundle(location, bundle):
'''Extract a bundle into git at location'''
ex = morphlib.execute.Execute(location, msg=logging.debug)
return ex.runv(['git', 'bundle', 'unbundle', bundle])
def clone(location, repo):
'''clone at git repo into location'''
ex = morphlib.execute.Execute('.', msg=logging.debug)
return ex.runv(['git', 'clone', repo, location])
def init(location):
'''initialise git repo at location'''
os.mkdir(location)
ex = morphlib.execute.Execute(location, msg=logging.debug)
return ex.runv(['git', 'init'])
def add_remote(gitdir, name, url):
'''add remote with name 'name' for url at gitdir'''
ex = morphlib.execute.Execute(gitdir, msg=logging.debug)
return ex.runv(['git', 'remote', 'add', '-f', name, url])
# FIXME: All usage of this must die and Treeishes should be used
def get_commit_id(repo, ref):
'''Return the full SHA-1 commit id for a repo+ref.'''
scheme, netlock, path, params, query, frag = urlparse.urlparse(repo)
assert scheme == 'file'
ex = morphlib.execute.Execute(path, msg=logging.debug)
out = ex.runv(['git', 'rev-list', '-n1', ref])
return out.strip()
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