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check.py
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/
check.py
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"""Module containing the logic for ``twine check``."""
# Copyright 2018 Dustin Ingram
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import cgi
import io
import logging
import re
from typing import List, Optional, Tuple, cast
import readme_renderer.rst
from rich import print
from twine import commands
from twine import package as package_file
logger = logging.getLogger(__name__)
_RENDERERS = {
None: readme_renderer.rst, # Default if description_content_type is None
"text/plain": None, # Rendering cannot fail
"text/x-rst": readme_renderer.rst,
"text/markdown": None, # Rendering cannot fail
}
# Regular expression used to capture and reformat docutils warnings into
# something that a human can understand. This is loosely borrowed from
# Sphinx: https://github.com/sphinx-doc/sphinx/blob
# /c35eb6fade7a3b4a6de4183d1dd4196f04a5edaf/sphinx/util/docutils.py#L199
_REPORT_RE = re.compile(
r"^<string>:(?P<line>(?:\d+)?): "
r"\((?P<level>DEBUG|INFO|WARNING|ERROR|SEVERE)/(\d+)?\) "
r"(?P<message>.*)",
re.DOTALL | re.MULTILINE,
)
class _WarningStream:
def __init__(self) -> None:
self.output = io.StringIO()
def write(self, text: str) -> None:
matched = _REPORT_RE.search(text)
if not matched:
self.output.write(text)
return
self.output.write(
"line {line}: {level_text}: {message}\n".format(
level_text=matched.group("level").capitalize(),
line=matched.group("line"),
message=matched.group("message").rstrip("\r\n"),
)
)
def __str__(self) -> str:
return self.output.getvalue().strip()
def _check_file(
filename: str, render_warning_stream: _WarningStream
) -> Tuple[List[str], bool]:
"""Check given distribution."""
warnings = []
is_ok = True
package = package_file.PackageFile.from_filename(filename, comment=None)
metadata = package.metadata_dictionary()
description = cast(Optional[str], metadata["description"])
description_content_type = cast(Optional[str], metadata["description_content_type"])
if description_content_type is None:
warnings.append(
"`long_description_content_type` missing. defaulting to `text/x-rst`."
)
description_content_type = "text/x-rst"
content_type, params = cgi.parse_header(description_content_type)
renderer = _RENDERERS.get(content_type, _RENDERERS[None])
if description is None or description.rstrip("\n") == "UNKNOWN":
warnings.append("`long_description` missing.")
elif renderer:
rendering_result = renderer.render(
description, stream=render_warning_stream, **params
)
if rendering_result is None:
is_ok = False
return warnings, is_ok
def check(
dists: List[str],
strict: bool = False,
) -> bool:
"""Check that a distribution will render correctly on PyPI and display the results.
This is currently only validates ``long_description``, but more checks could be
added; see https://github.com/pypa/twine/projects/2.
:param dists:
The distribution files to check.
:param output_stream:
The destination of the resulting output.
:param strict:
If ``True``, treat warnings as errors.
:return:
``True`` if there are rendering errors, otherwise ``False``.
"""
uploads = [i for i in commands._find_dists(dists) if not i.endswith(".asc")]
if not uploads: # Return early, if there are no files to check.
logger.error("No files to check.")
return False
failure = False
for filename in uploads:
print(f"Checking {filename}: ", end="")
render_warning_stream = _WarningStream()
warnings, is_ok = _check_file(filename, render_warning_stream)
# Print the status and/or error
if not is_ok:
failure = True
print("[red]FAILED[/red]")
logger.error(
"`long_description` has syntax errors in markup"
" and would not be rendered on PyPI."
f"\n{render_warning_stream}"
)
elif warnings:
if strict:
failure = True
print("[red]FAILED due to warnings[/red]")
else:
print("[yellow]PASSED with warnings[/yellow]")
else:
print("[green]PASSED[/green]")
# Print warnings after the status and/or error
for message in warnings:
logger.warning(message)
return failure
def main(args: List[str]) -> bool:
"""Execute the ``check`` command.
:param args:
The command-line arguments.
:return:
The exit status of the ``check`` command.
"""
parser = argparse.ArgumentParser(prog="twine check")
parser.add_argument(
"dists",
nargs="+",
metavar="dist",
help="The distribution files to check, usually dist/*",
)
parser.add_argument(
"--strict",
action="store_true",
default=False,
required=False,
help="Fail on warnings",
)
parsed_args = parser.parse_args(args)
# Call the check function with the arguments from the command line
return check(parsed_args.dists, strict=parsed_args.strict)