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Merge pull request #1102 from raimue/debquery-uncompressed-control-tar

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DebQuery: Handle uncompressed Debian packages
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Daniel Mach 2022-10-03 09:26:58 +02:00 committed by GitHub
commit 99db2c8b22
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1 changed files with 53 additions and 40 deletions
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93
osc/util/debquery.py
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@ -23,11 +23,6 @@ except ImportError:
HAVE_ZSTD = False
if (not hasattr(itertools, 'zip_longest') and hasattr(itertools, 'izip_longest')):
# python2 case
itertools.zip_longest = itertools.izip_longest
class DebError(packagequery.PackageError):
pass
@ -41,55 +36,73 @@ class DebQuery(packagequery.PackageQuery, packagequery.PackageQueryResult):
)
def __init__(self, fh):
self.__file = fh
self.__path = os.path.abspath(fh.name)
self._file = fh
self._path = os.path.abspath(fh.name)
self.filename_suffix = 'deb'
self.fields = {}
def read(self, all_tags=False, self_provides=True, *extra_tags):
arfile = ar.Ar(fh=self.__file)
arfile = ar.Ar(fh=self._file)
arfile.read()
debbin = arfile.get_file(b'debian-binary')
if debbin is None:
raise DebError(self.__path, 'no debian binary')
raise DebError(self._path, 'no debian binary')
if debbin.read() != b'2.0\n':
raise DebError(self.__path, 'invalid debian binary format')
control = arfile.get_file(b'control.tar.gz')
if control is not None:
# XXX: python2.4 relies on a name
tar = tarfile.open(name='control.tar.gz', fileobj=control)
else:
control = arfile.get_file(b'control.tar.xz')
if control:
if not HAVE_LZMA:
raise DebError(self.__path, 'can\'t open control.tar.xz without python-lzma')
decompressed = lzma.decompress(control.read())
tar = tarfile.open(name="control.tar.xz",
fileobj=BytesIO(decompressed))
else:
control = arfile.get_file(b'control.tar.zst')
if control:
if not HAVE_ZSTD:
raise DebError(self.__path, 'can\'t open control.tar.zst without python-zstandard')
with zstandard.ZstdDecompressor().stream_reader(BytesIO(control.read())) as reader:
decompressed = reader.read()
tar = tarfile.open(name="control.tar.zst",
fileobj=BytesIO(decompressed))
if control is None:
raise DebError(self.__path, 'missing control.tar')
raise DebError(self._path, 'invalid debian binary format')
for open_func in [self._open_tar_gz,
self._open_tar_xz,
self._open_tar_zst,
self._open_tar]:
tar = open_func(arfile)
if tar is not None:
break
if tar is None:
raise DebError(self._path, 'missing control.tar')
try:
name = './control'
# workaround for python2.4's tarfile module
if 'control' in tar.getnames():
name = 'control'
control = tar.extractfile(name)
except KeyError:
raise DebError(self.__path,
raise DebError(self._path,
'missing \'control\' file in control.tar')
self.__parse_control(control, all_tags, self_provides, *extra_tags)
self._parse_control(control, all_tags, self_provides, *extra_tags)
return self
def __parse_control(self, control, all_tags=False, self_provides=True, *extra_tags):
def _open_tar(self, arfile):
control = arfile.get_file(b'control.tar')
if not control:
return None
return tarfile.open(fileobj=control)
def _open_tar_gz(self, arfile):
control = arfile.get_file(b'control.tar.gz')
if not control:
return None
return tarfile.open(fileobj=control)
def _open_tar_xz(self, arfile):
control = arfile.get_file(b'control.tar.xz')
if not control:
return None
if not HAVE_LZMA:
raise DebError(self._path, 'can\'t open control.tar.xz without python-lzma')
decompressed = lzma.decompress(control.read())
return tarfile.open(fileobj=BytesIO(decompressed))
def _open_tar_zst(self, arfile):
control = arfile.get_file(b'control.tar.zst')
if not control:
return None
if not HAVE_ZSTD:
raise DebError(self._path, 'can\'t open control.tar.zst without python-zstandard')
with zstandard.ZstdDecompressor().stream_reader(BytesIO(control.read())) as reader:
decompressed = reader.read()
return tarfile.open(fileobj=BytesIO(decompressed))
def _parse_control(self, control, all_tags=False, self_provides=True, *extra_tags):
data = control.readline().strip()
while data:
field, val = re.split(br':\s*', data.strip(), 1)
@ -158,7 +171,7 @@ class DebQuery(packagequery.PackageQuery, packagequery.PackageQueryResult):
return self.fields[b'description']
def path(self):
return self.__path
return self._path
def provides(self):
return self.fields[b'provides']