def package_image(argv):
args = parse_args(argv)
with open(args.subvolume_json) as infile:
Format.make(args.format).package_full(
SubvolumeOnDisk.from_json_file(infile, args.subvolumes_dir),
output_path=args.output_path,
)
def package_full(self, svod: SubvolumeOnDisk, output_path: str):
# Future: rpm.common.create_ro, but it's kind of a big dep.
# Luckily `image_package` will promptly mark this read-only.
assert not os.path.exists(output_path)
with open(output_path, 'wb') as outfile, Subvol(
svod.subvolume_path(), already_exists=True,
).mark_readonly_and_write_sendstream_to_file(outfile):
pass
def find_built_subvol(layer_output, path_in_repo=None):
with open(os.path.join(layer_output, 'layer.json')) as infile:
return Subvol(
SubvolumeOnDisk.from_json_file(
infile,
subvolumes_dir(path_in_repo),
).subvolume_path(),
already_exists=True,
)
def package_full(self, svod: SubvolumeOnDisk, output_path: str):
assert not os.path.exists(output_path)
with open(output_path, 'wb') as outfile, subprocess.Popen(
['zstd', '--stdout'], stdin=subprocess.PIPE, stdout=outfile
) as zstd, Subvol(
svod.subvolume_path(), already_exists=True,
).mark_readonly_and_write_sendstream_to_file(zstd.stdin):
pass
check_popen_returncode(zstd)
def package_full(self, svod: SubvolumeOnDisk, output_path: str):
Subvol(
svod.subvolume_path(), already_exists=True,
).mark_readonly_and_send_to_new_loopback(output_path)
# Paranoia: images are read-only after being built
os.chmod(
output_path,
stat.S_IMODE(os.stat(output_path).st_mode)
& ~(stat.S_IWUSR | stat.S_IWGRP | stat.S_IWOTH),
)
def find_built_subvol(
layer_output, *, path_in_repo=None, subvolumes_dir=None,
):
# It's OK for both to be None (uses the current file to find repo), but
# it's not OK to set both.
assert (path_in_repo is None) or (subvolumes_dir is None)
with open(Path(layer_output) / 'layer.json') as infile:
return Subvol(
SubvolumeOnDisk.from_json_file(
infile,
subvolumes_dir if subvolumes_dir
else _get_subvolumes_dir(path_in_repo),
).subvolume_path(),
already_exists=True,
)
def get_subvolume_path(layer_json, subvolumes_dir):
with open(layer_json) as infile:
return SubvolumeOnDisk.from_json_file(infile,
subvolumes_dir).subvolume_path()