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# Copyright 2001-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
import tarfile
from portage import os
from portage.const import SUPPORTED_XPAK_EXTENSIONS, SUPPORTED_GPKG_EXTENSIONS
from portage.exception import InvalidBinaryPackageFormat
from portage.output import colorize
from portage.util import writemsg
def get_binpkg_format(binpkg_path, check_file=False, remote=False):
if binpkg_path.endswith(SUPPORTED_XPAK_EXTENSIONS):
file_ext_format = "xpak"
elif binpkg_path.endswith(SUPPORTED_GPKG_EXTENSIONS):
file_ext_format = "gpkg"
else:
file_ext_format = None
if remote:
if file_ext_format is not None:
return file_ext_format
else:
raise InvalidBinaryPackageFormat(
f"Unsupported binary package format from '{binpkg_path}'"
)
if file_ext_format is not None and not check_file:
return file_ext_format
try:
with open(binpkg_path, "rb") as binpkg_file:
header = binpkg_file.read(100)
if b"/gpkg-1\x00" in header:
file_format = "gpkg"
else:
binpkg_file.seek(-16, 2)
tail = binpkg_file.read(16)
if (tail[0:8] == b"XPAKSTOP") and (tail[12:16] == b"STOP"):
file_format = "xpak"
else:
file_format = None
# check if wrong order gpkg
if file_format is None:
try:
with tarfile.open(binpkg_path) as gpkg_tar:
if "gpkg-1" in (os.path.basename(f) for f in gpkg_tar.getnames()):
file_format = "gpkg"
except tarfile.TarError:
pass
except Exception as err:
# We got many different exceptions here, so have to catch all of them.
file_format = None
writemsg(
colorize("ERR", f"Error reading binpkg '{binpkg_path}': {err}\n"),
)
raise InvalidBinaryPackageFormat(f"Error reading binpkg '{binpkg_path}': {err}")
if file_format is None:
raise InvalidBinaryPackageFormat(
f"Unsupported binary package format from '{binpkg_path}'"
)
if (file_ext_format is not None) and (file_ext_format != file_format):
writemsg(
colorize(
"WARN",
"File {} binpkg format mismatch, actual format: {}\n".format(
binpkg_path, file_format
),
)
)
return file_format
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