File size: 3,071 Bytes
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Exception-compatible adapter from conda_package_streaming.
"""
from __future__ import annotations
import io
import tarfile
from contextlib import redirect_stdout
from tarfile import TarError
from typing import Generator
from zipfile import BadZipFile
from conda_package_streaming.extract import exceptions as cps_exceptions
from conda_package_streaming.extract import extract_stream, package_streaming
from . import exceptions
def _stream_components(
filename: str,
components: list[str],
dest_dir: str = "",
) -> Generator[Generator[tuple[tarfile.TarFile, tarfile.TarInfo]]]:
if str(filename).endswith(".tar.bz2"):
assert components == ["pkg"]
try:
with open(filename, "rb") as fileobj:
for component in components:
# will parse zipfile twice
yield package_streaming.stream_conda_component(
filename, fileobj, component=component
)
except cps_exceptions.CaseInsensitiveFileSystemError as e:
raise exceptions.CaseInsensitiveFileSystemError(filename, dest_dir) from e
except (OSError, TarError, BadZipFile) as e:
raise exceptions.InvalidArchiveError(filename, f"failed with error: {str(e)}") from e
def _extract(filename: str, dest_dir: str, components: list[str]):
"""
Extract .conda or .tar.bz2 package to dest_dir.
If it's a conda package, components may be ["pkg", "info"]
If it's a .tar.bz2 package, components must equal ["pkg"]
Internal. Skip directly to conda-package-streaming if you don't need
exception compatibility.
"""
for stream in _stream_components(filename, components, dest_dir=dest_dir):
try:
extract_stream(stream, dest_dir)
except cps_exceptions.CaseInsensitiveFileSystemError as e:
raise exceptions.CaseInsensitiveFileSystemError(filename, dest_dir) from e
except (OSError, TarError, BadZipFile) as e:
raise exceptions.InvalidArchiveError(filename, f"failed with error: {str(e)}") from e
def _list(filename: str, components: list[str], verbose=True):
memfile = io.StringIO()
for component in _stream_components(filename, components):
for tar, _ in component:
with redirect_stdout(memfile):
tar.list(verbose=verbose)
# next iteraton of for loop raises GeneratorExit in stream
# see comments in conda_package_streaming.extract:extract_stream
# and docstring in conda_package_streaming.package_streaming:stream_conda_info
component.close()
memfile.seek(0)
if verbose:
lines = sorted(
memfile.readlines(),
# verbose Tarfile.list() produces lines like:
# ?rw-r--r-- 502/20 2342 2018-10-04 14:02:00 info/about.json
# We only want the last part but we need to be mindful of paths containing spaces
key=lambda line: line.split(None, 5)[-1],
)
else:
lines = sorted(memfile.readlines())
print("".join(lines), end="")
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