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Jun 5, 2025
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taking gloves, as bitten per this dark art #1634

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35 changes: 12 additions & 23 deletions winpython/packagemetadata.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
packagemetadata.py - get metadata from designated place
"""
Expand All @@ -8,12 +8,11 @@
import zipfile
import sys
from pathlib import Path
from collections import defaultdict
import shutil
import subprocess
from typing import Dict, List, Optional, Tuple
from . import utils

import importlib.metadata
import email
from packaging.utils import canonicalize_name
# --- Abstract metadata accessor ---

class PackageMetadata:
Expand All @@ -28,11 +27,10 @@ def __init__(self, name, version, requires, summary, description, metadata):

def get_installed_metadata(path = None) -> List[PackageMetadata]:
# Use importlib.metadata or pkg_resources
import importlib.metadata
pkgs = []
distro = importlib.metadata.distributions(path = path) if path else importlib.metadata.distributions()
for dist in distro:
name = dist.metadata['Name']
name = canonicalize_name(dist.metadata['Name'])
version = dist.version
summary = dist.metadata.get("Summary", ""),
description = dist.metadata.get("Description", ""),
Expand All @@ -56,7 +54,6 @@ def get_directory_metadata(directory: str) -> List[PackageMetadata]:
return pkgs

def extract_metadata_from_wheel(path: str) -> PackageMetadata:
import zipfile
with zipfile.ZipFile(path) as zf:
for name in zf.namelist():
if name.endswith(r'.dist-info/METADATA') and name.split("/")[1] == "METADATA":
Expand All @@ -66,7 +63,6 @@ def extract_metadata_from_wheel(path: str) -> PackageMetadata:
raise ValueError(f"No METADATA found in {path}")

def extract_metadata_from_sdist(path: str) -> PackageMetadata:
import tarfile
with tarfile.open(path, "r:gz") as tf:
for member in tf.getmembers():
if member.name.endswith('PKG-INFO'):
Expand All @@ -75,20 +71,13 @@ def extract_metadata_from_sdist(path: str) -> PackageMetadata:
raise ValueError(f"No PKG-INFO found in {path}")

def parse_metadata_file(txt: str) -> PackageMetadata:
name = version = summary = description = ""
requires = []
description_lines = []
in_description = False
for line in txt.splitlines():
if line.startswith('Name: '):
name = line[6:].strip()
elif line.startswith('Version: '):
version = line[9:].strip()
elif line.startswith('Summary: '):
summary = description = line[9:].strip()
elif line.startswith('Requires-Dist: '):
requires.append(line[14:].strip())
return PackageMetadata(name, version, requires, summary, description, {'Name': name, "Summary": summary, "Description": description})
meta = email.message_from_string(txt)
name = canonicalize_name(meta.get('Name', ''))
version = meta.get('Version', '')
summary = meta.get('Summary', '')
description = meta.get('Description', '')
requires = meta.get_all('Requires-Dist') or []
return PackageMetadata(name, version, requires, summary, description, dict(meta.items()))

def main():
if len(sys.argv) > 1:
Expand Down