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from __future__ import annotations
import os.path
import re
from abc import ABCMeta, abstractmethod
from collections import defaultdict
from collections.abc import Iterator
from email.message import Message
from email.parser import Parser
from email.policy import EmailPolicy
from glob import iglob
from pathlib import Path
from textwrap import dedent
from zipfile import ZipFile
from .. import __version__
from ..metadata import generate_requirements
from ..vendored.packaging.tags import parse_tag
from ..wheelfile import WheelFile
egg_filename_re = re.compile(
r"""
(?P<name>.+?)-(?P<ver>.+?)
(-(?P<pyver>py\d\.\d+)
(-(?P<arch>.+?))?
)?.egg$""",
re.VERBOSE,
)
egg_info_re = re.compile(
r"""
^(?P<name>.+?)-(?P<ver>.+?)
(-(?P<pyver>py\d\.\d+)
)?.egg-info/""",
re.VERBOSE,
)
wininst_re = re.compile(
r"\.(?P<platform>win32|win-amd64)(?:-(?P<pyver>py\d\.\d))?\.exe$"
)
pyd_re = re.compile(r"\.(?P<abi>[a-z0-9]+)-(?P<platform>win32|win_amd64)\.pyd$")
serialization_policy = EmailPolicy(
utf8=True,
mangle_from_=False,
max_line_length=0,
)
GENERATOR = f"wheel {__version__}"
def convert_requires(requires: str, metadata: Message) -> None:
extra: str | None = None
requirements: dict[str | None, list[str]] = defaultdict(list)
for line in requires.splitlines():
line = line.strip()
if not line:
continue
if line.startswith("[") and line.endswith("]"):
extra = line[1:-1]
continue
requirements[extra].append(line)
for key, value in generate_requirements(requirements):
metadata.add_header(key, value)
def convert_pkg_info(pkginfo: str, metadata: Message):
parsed_message = Parser().parsestr(pkginfo)
for key, value in parsed_message.items():
key_lower = key.lower()
if value == "UNKNOWN":
continue
if key_lower == "description":
description_lines = value.splitlines()
value = "\n".join(
(
description_lines[0].lstrip(),
dedent("\n".join(description_lines[1:])),
"\n",
)
)
metadata.set_payload(value)
elif key_lower == "home-page":
metadata.add_header("Project-URL", f"Homepage, {value}")
elif key_lower == "download-url":
metadata.add_header("Project-URL", f"Download, {value}")
else:
metadata.add_header(key, value)
metadata.replace_header("Metadata-Version", "2.4")
def normalize(name: str) -> str:
return re.sub(r"[-_.]+", "-", name).lower().replace("-", "_")
class ConvertSource(metaclass=ABCMeta):
name: str
version: str
pyver: str = "py2.py3"
abi: str = "none"
platform: str = "any"
metadata: Message
@property
def dist_info_dir(self) -> str:
return f"{self.name}-{self.version}.dist-info"
@abstractmethod
def generate_contents(self) -> Iterator[tuple[str, bytes]]:
pass
class EggFileSource(ConvertSource):
def __init__(self, path: Path):
if not (match := egg_filename_re.match(path.name)):
raise ValueError(f"Invalid egg file name: {path.name}")
# Binary wheels are assumed to be for CPython
self.path = path
self.name = normalize(match.group("name"))
self.version = match.group("ver")
if pyver := match.group("pyver"):
self.pyver = pyver.replace(".", "")
if arch := match.group("arch"):
self.abi = self.pyver.replace("py", "cp")
self.platform = normalize(arch)
self.metadata = Message()
def generate_contents(self) -> Iterator[tuple[str, bytes]]:
with ZipFile(self.path, "r") as zip_file:
for filename in sorted(zip_file.namelist()):
# Skip pure directory entries
if filename.endswith("/"):
continue
# Handle files in the egg-info directory specially, selectively moving
# them to the dist-info directory while converting as needed
if filename.startswith("EGG-INFO/"):
if filename == "EGG-INFO/requires.txt":
requires = zip_file.read(filename).decode("utf-8")
convert_requires(requires, self.metadata)
elif filename == "EGG-INFO/PKG-INFO":
pkginfo = zip_file.read(filename).decode("utf-8")
convert_pkg_info(pkginfo, self.metadata)
elif filename == "EGG-INFO/entry_points.txt":
yield (
f"{self.dist_info_dir}/entry_points.txt",
zip_file.read(filename),
)
continue
# For any other file, just pass it through
yield filename, zip_file.read(filename)
class EggDirectorySource(EggFileSource):
def generate_contents(self) -> Iterator[tuple[str, bytes]]:
for dirpath, _, filenames in os.walk(self.path):
for filename in sorted(filenames):
path = Path(dirpath, filename)
if path.parent.name == "EGG-INFO":
if path.name == "requires.txt":
requires = path.read_text("utf-8")
convert_requires(requires, self.metadata)
elif path.name == "PKG-INFO":
pkginfo = path.read_text("utf-8")
convert_pkg_info(pkginfo, self.metadata)
if name := self.metadata.get("Name"):
self.name = normalize(name)
if version := self.metadata.get("Version"):
self.version = version
elif path.name == "entry_points.txt":
yield (
f"{self.dist_info_dir}/entry_points.txt",
path.read_bytes(),
)
continue
# For any other file, just pass it through
yield str(path.relative_to(self.path)), path.read_bytes()
class WininstFileSource(ConvertSource):
"""
Handles distributions created with ``bdist_wininst``.
The egginfo filename has the format::
name-ver(-pyver)(-arch).egg-info
The installer filename has the format::
name-ver.arch(-pyver).exe
Some things to note:
1. The installer filename is not definitive. An installer can be renamed
and work perfectly well as an installer. So more reliable data should
be used whenever possible.
2. The egg-info data should be preferred for the name and version, because
these come straight from the distutils metadata, and are mandatory.
3. The pyver from the egg-info data should be ignored, as it is
constructed from the version of Python used to build the installer,
which is irrelevant - the installer filename is correct here (even to
the point that when it's not there, any version is implied).
4. The architecture must be taken from the installer filename, as it is
not included in the egg-info data.
5. Architecture-neutral installers still have an architecture because the
installer format itself (being executable) is architecture-specific. We
should therefore ignore the architecture if the content is pure-python.
"""
def __init__(self, path: Path):
self.path = path
self.metadata = Message()
# Determine the initial architecture and Python version from the file name
# (if possible)
if match := wininst_re.search(path.name):
self.platform = normalize(match.group("platform"))
if pyver := match.group("pyver"):
self.pyver = pyver.replace(".", "")
# Look for an .egg-info directory and any .pyd files for more precise info
egg_info_found = pyd_found = False
with ZipFile(self.path) as zip_file:
for filename in zip_file.namelist():
prefix, filename = filename.split("/", 1)
if not egg_info_found and (match := egg_info_re.match(filename)):
egg_info_found = True
self.name = normalize(match.group("name"))
self.version = match.group("ver")
if pyver := match.group("pyver"):
self.pyver = pyver.replace(".", "")
elif not pyd_found and (match := pyd_re.search(filename)):
pyd_found = True
self.abi = match.group("abi")
self.platform = match.group("platform")
if egg_info_found and pyd_found:
break
def generate_contents(self) -> Iterator[tuple[str, bytes]]:
dist_info_dir = f"{self.name}-{self.version}.dist-info"
data_dir = f"{self.name}-{self.version}.data"
with ZipFile(self.path, "r") as zip_file:
for filename in sorted(zip_file.namelist()):
# Skip pure directory entries
if filename.endswith("/"):
continue
# Handle files in the egg-info directory specially, selectively moving
# them to the dist-info directory while converting as needed
prefix, target_filename = filename.split("/", 1)
if egg_info_re.search(target_filename):
basename = target_filename.rsplit("/", 1)[-1]
if basename == "requires.txt":
requires = zip_file.read(filename).decode("utf-8")
convert_requires(requires, self.metadata)
elif basename == "PKG-INFO":
pkginfo = zip_file.read(filename).decode("utf-8")
convert_pkg_info(pkginfo, self.metadata)
elif basename == "entry_points.txt":
yield (
f"{dist_info_dir}/entry_points.txt",
zip_file.read(filename),
)
continue
elif prefix == "SCRIPTS":
target_filename = f"{data_dir}/scripts/{target_filename}"
# For any other file, just pass it through
yield target_filename, zip_file.read(filename)
def convert(files: list[str], dest_dir: str, verbose: bool) -> None:
for pat in files:
for archive in iglob(pat):
path = Path(archive)
if path.suffix == ".egg":
if path.is_dir():
source: ConvertSource = EggDirectorySource(path)
else:
source = EggFileSource(path)
else:
source = WininstFileSource(path)
if verbose:
print(f"{archive}...", flush=True, end="")
dest_path = Path(dest_dir) / (
f"{source.name}-{source.version}-{source.pyver}-{source.abi}"
f"-{source.platform}.whl"
)
with WheelFile(dest_path, "w") as wheelfile:
for name_or_zinfo, contents in source.generate_contents():
wheelfile.writestr(name_or_zinfo, contents)
# Write the METADATA file
wheelfile.writestr(
f"{source.dist_info_dir}/METADATA",
source.metadata.as_string(policy=serialization_policy).encode(
"utf-8"
),
)
# Write the WHEEL file
wheel_message = Message()
wheel_message.add_header("Wheel-Version", "1.0")
wheel_message.add_header("Generator", GENERATOR)
wheel_message.add_header(
"Root-Is-Purelib", str(source.platform == "any").lower()
)
tags = parse_tag(f"{source.pyver}-{source.abi}-{source.platform}")
for tag in sorted(tags, key=lambda tag: tag.interpreter):
wheel_message.add_header("Tag", str(tag))
wheelfile.writestr(
f"{source.dist_info_dir}/WHEEL",
wheel_message.as_string(policy=serialization_policy).encode(
"utf-8"
),
)
if verbose:
print("OK")
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