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"""VCS support."""
# TODO:
# * add svn support
# * integrate properly with reports
missing = []
import errno
import os
import shutil
import sys
import stat
# python-dulwich git imports
try:
import dulwich
import dulwich.index
from dulwich.errors import NotGitRepository
except ImportError:
missing.append('git')
# subversion import
try:
import pysvn
except ImportError:
missing.append('svn')
import Bcfg2.Client.Tools
def cleanup_mode(mode):
"""Cleanup a mode value.
This will return a mode that can be stored in a tree object.
:param mode: Mode to clean up.
"""
if stat.S_ISLNK(mode):
return stat.S_IFLNK
elif stat.S_ISDIR(mode):
return stat.S_IFDIR
elif dulwich.index.S_ISGITLINK(mode):
return dulwich.index.S_IFGITLINK
ret = stat.S_IFREG | int('644', 8)
ret |= (mode & int('111', 8))
return ret
def index_entry_from_stat(stat_val, hex_sha, flags, mode=None):
"""Create a new index entry from a stat value.
:param stat_val: POSIX stat_result instance
:param hex_sha: Hex sha of the object
:param flags: Index flags
"""
if mode is None:
mode = cleanup_mode(stat_val.st_mode)
return (stat_val.st_ctime, stat_val.st_mtime, stat_val.st_dev,
stat_val.st_ino, mode, stat_val.st_uid,
stat_val.st_gid, stat_val.st_size, hex_sha, flags)
class VCS(Bcfg2.Client.Tools.Tool):
"""VCS support."""
__handles__ = [('Path', 'vcs')]
__req__ = {'Path': ['name',
'type',
'vcstype',
'sourceurl',
'revision']}
def git_write_index(self, entry):
"""Write the git index"""
pass
def Verifygit(self, entry, _):
"""Verify git repositories"""
try:
repo = dulwich.repo.Repo(entry.get('name'))
except NotGitRepository:
self.logger.info("Repository %s does not exist" %
entry.get('name'))
return False
try:
expected_rev = entry.get('revision')
cur_rev = repo.head()
except:
return False
try:
client, path = dulwich.client.get_transport_and_path(entry.get('sourceurl'))
remote_refs = client.fetch_pack(path, (lambda x: None), None, None, None)
if expected_rev in remote_refs:
expected_rev = remote_refs[expected_rev]
except:
pass
if cur_rev != expected_rev:
self.logger.info("At revision %s need to go to revision %s" %
(cur_rev.strip(), expected_rev.strip()))
return False
return True
def Installgit(self, entry):
"""Checkout contents from a git repository"""
destname = entry.get('name')
if os.path.lexists(destname):
# remove incorrect contents
try:
if os.path.isdir(destname):
shutil.rmtree(destname)
else:
os.remove(destname)
except OSError:
self.logger.info('Failed to remove %s' %
destname)
return False
dulwich.file.ensure_dir_exists(destname)
destr = dulwich.repo.Repo.init(destname)
cl, host_path = dulwich.client.get_transport_and_path(entry.get('sourceurl'))
remote_refs = cl.fetch(host_path,
destr,
determine_wants=destr.object_store.determine_wants_all,
progress=sys.stdout.write)
if entry.get('revision') in remote_refs:
destr.refs['HEAD'] = remote_refs[entry.get('revision')]
else:
destr.refs['HEAD'] = entry.get('revision')
dtree = destr['HEAD'].tree
index = dulwich.index.Index(destr.index_path())
for fname, mode, sha in destr.object_store.iter_tree_contents(dtree):
full_path = os.path.join(destname, fname)
dulwich.file.ensure_dir_exists(os.path.dirname(full_path))
if dulwich.objects.S_ISGITLINK(mode):
src_path = destr[sha].as_raw_string()
try:
os.symlink(src_path, full_path)
except OSError:
e = sys.exc_info()[1]
if e.errno == errno.EEXIST:
os.unlink(full_path)
os.symlink(src_path, full_path)
else:
raise
else:
file = open(full_path, 'wb')
file.write(destr[sha].as_raw_string())
file.close()
os.chmod(full_path, mode)
st = os.lstat(full_path)
index[fname] = index_entry_from_stat(st, sha, 0)
index.write()
return True
def Verifysvn(self, entry, _):
"""Verify svn repositories"""
client = pysvn.Client()
try:
cur_rev = str(client.info(entry.get('name')).revision.number)
except:
self.logger.info("Repository %s does not exist" % entry.get('name'))
return False
if cur_rev != entry.get('revision'):
self.logger.info("At revision %s need to go to revision %s" %
(cur_rev, entry.get('revision')))
return False
return True
def Installsvn(self, entry):
"""Checkout contents from a svn repository"""
# pylint: disable=E1101
client = pysvn.Client()
try:
client.update(entry.get('name'), recurse=True)
except pysvn.ClientError:
self.logger.error("Failed to update repository", exc_info=1)
return False
return True
# pylint: enable=E1101
def VerifyPath(self, entry, _):
vcs = entry.get('vcstype')
if vcs in missing:
self.logger.error("Missing %s python libraries. Cannot verify" %
vcs)
return False
ret = getattr(self, 'Verify%s' % vcs)
return ret(entry, _)
def InstallPath(self, entry):
vcs = entry.get('vcstype')
if vcs in missing:
self.logger.error("Missing %s python libraries. "
"Unable to install" % vcs)
return False
ret = getattr(self, 'Install%s' % vcs)
return ret(entry)
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