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support zst compressed control files in deb archives

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eg. some packages Ubuntu 21.10
This commit is contained in:
Adrian Schröter 2021-10-22 16:42:08 +02:00
parent 16ec3ff9f9
commit fe311c7ae5
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GPG Key ID: 918D8C954C08DB67
1 changed files with 22 additions and 5 deletions
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21
osc/util/debquery.py
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@ -16,6 +16,13 @@ try:
except ImportError:
HAVE_LZMA = False
HAVE_ZSTD = True
try:
# Note: zstd is not supporting stream compression types
import zstandard
except ImportError:
HAVE_ZSTD = False
if (not hasattr(itertools, 'zip_longest')
and hasattr(itertools, 'izip_longest')):
@ -52,13 +59,23 @@ class DebQuery(packagequery.PackageQuery, packagequery.PackageQueryResult):
tar = tarfile.open(name='control.tar.gz', fileobj=control)
else:
control = arfile.get_file(b'control.tar.xz')
if control is None:
raise DebError(self.__path, 'missing control.tar')
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')
try:
name = './control'
# workaround for python2.4's tarfile module