1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
import email.message
import importlib.metadata
import pathlib
import zipfile
from os import PathLike
from typing import (
Collection,
Dict,
Iterable,
Iterator,
Mapping,
Optional,
Sequence,
Union,
cast,
)
from pip._vendor.packaging.requirements import Requirement
from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
from pip._vendor.packaging.version import Version
from pip._vendor.packaging.version import parse as parse_version
from pip._internal.exceptions import InvalidWheel, UnsupportedWheel
from pip._internal.metadata.base import (
BaseDistribution,
BaseEntryPoint,
InfoPath,
Wheel,
)
from pip._internal.utils.misc import normalize_path
from pip._internal.utils.packaging import get_requirement
from pip._internal.utils.temp_dir import TempDirectory
from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file
from ._compat import (
BasePath,
get_dist_canonical_name,
parse_name_and_version_from_info_directory,
)
class WheelDistribution(importlib.metadata.Distribution):
"""An ``importlib.metadata.Distribution`` read from a wheel.
Although ``importlib.metadata.PathDistribution`` accepts ``zipfile.Path``,
its implementation is too "lazy" for pip's needs (we can't keep the ZipFile
handle open for the entire lifetime of the distribution object).
This implementation eagerly reads the entire metadata directory into the
memory instead, and operates from that.
"""
def __init__(
self,
files: Mapping[pathlib.PurePosixPath, bytes],
info_location: pathlib.PurePosixPath,
) -> None:
self._files = files
self.info_location = info_location
@classmethod
def from_zipfile(
cls,
zf: zipfile.ZipFile,
name: str,
location: str,
) -> "WheelDistribution":
info_dir, _ = parse_wheel(zf, name)
paths = (
(name, pathlib.PurePosixPath(name.split("/", 1)[-1]))
for name in zf.namelist()
if name.startswith(f"{info_dir}/")
)
files = {
relpath: read_wheel_metadata_file(zf, fullpath)
for fullpath, relpath in paths
}
info_location = pathlib.PurePosixPath(location, info_dir)
return cls(files, info_location)
def iterdir(self, path: InfoPath) -> Iterator[pathlib.PurePosixPath]:
# Only allow iterating through the metadata directory.
if pathlib.PurePosixPath(str(path)) in self._files:
return iter(self._files)
raise FileNotFoundError(path)
def read_text(self, filename: str) -> Optional[str]:
try:
data = self._files[pathlib.PurePosixPath(filename)]
except KeyError:
return None
try:
text = data.decode("utf-8")
except UnicodeDecodeError as e:
wheel = self.info_location.parent
error = f"Error decoding metadata for {wheel}: {e} in {filename} file"
raise UnsupportedWheel(error)
return text
def locate_file(self, path: Union[str, "PathLike[str]"]) -> pathlib.Path:
# This method doesn't make sense for our in-memory wheel, but the API
# requires us to define it.
raise NotImplementedError
class Distribution(BaseDistribution):
def __init__(
self,
dist: importlib.metadata.Distribution,
info_location: Optional[BasePath],
installed_location: Optional[BasePath],
) -> None:
self._dist = dist
self._info_location = info_location
self._installed_location = installed_location
@classmethod
def from_directory(cls, directory: str) -> BaseDistribution:
info_location = pathlib.Path(directory)
dist = importlib.metadata.Distribution.at(info_location)
return cls(dist, info_location, info_location.parent)
@classmethod
def from_metadata_file_contents(
cls,
metadata_contents: bytes,
filename: str,
project_name: str,
) -> BaseDistribution:
# Generate temp dir to contain the metadata file, and write the file contents.
temp_dir = pathlib.Path(
TempDirectory(kind="metadata", globally_managed=True).path
)
metadata_path = temp_dir / "METADATA"
metadata_path.write_bytes(metadata_contents)
# Construct dist pointing to the newly created directory.
dist = importlib.metadata.Distribution.at(metadata_path.parent)
return cls(dist, metadata_path.parent, None)
@classmethod
def from_wheel(cls, wheel: Wheel, name: str) -> BaseDistribution:
try:
with wheel.as_zipfile() as zf:
dist = WheelDistribution.from_zipfile(zf, name, wheel.location)
except zipfile.BadZipFile as e:
raise InvalidWheel(wheel.location, name) from e
return cls(dist, dist.info_location, pathlib.PurePosixPath(wheel.location))
@property
def location(self) -> Optional[str]:
if self._info_location is None:
return None
return str(self._info_location.parent)
@property
def info_location(self) -> Optional[str]:
if self._info_location is None:
return None
return str(self._info_location)
@property
def installed_location(self) -> Optional[str]:
if self._installed_location is None:
return None
return normalize_path(str(self._installed_location))
@property
def canonical_name(self) -> NormalizedName:
return get_dist_canonical_name(self._dist)
@property
def version(self) -> Version:
if version := parse_name_and_version_from_info_directory(self._dist)[1]:
return parse_version(version)
return parse_version(self._dist.version)
@property
def raw_version(self) -> str:
return self._dist.version
def is_file(self, path: InfoPath) -> bool:
return self._dist.read_text(str(path)) is not None
def iter_distutils_script_names(self) -> Iterator[str]:
# A distutils installation is always "flat" (not in e.g. egg form), so
# if this distribution's info location is NOT a pathlib.Path (but e.g.
# zipfile.Path), it can never contain any distutils scripts.
if not isinstance(self._info_location, pathlib.Path):
return
for child in self._info_location.joinpath("scripts").iterdir():
yield child.name
def read_text(self, path: InfoPath) -> str:
content = self._dist.read_text(str(path))
if content is None:
raise FileNotFoundError(path)
return content
def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
# importlib.metadata's EntryPoint structure satisfies BaseEntryPoint.
return self._dist.entry_points
def _metadata_impl(self) -> email.message.Message:
# From Python 3.10+, importlib.metadata declares PackageMetadata as the
# return type. This protocol is unfortunately a disaster now and misses
# a ton of fields that we need, including get() and get_payload(). We
# rely on the implementation that the object is actually a Message now,
# until upstream can improve the protocol. (python/cpython#94952)
return cast(email.message.Message, self._dist.metadata)
def iter_provided_extras(self) -> Iterable[NormalizedName]:
return [
canonicalize_name(extra)
for extra in self.metadata.get_all("Provides-Extra", [])
]
def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
contexts: Sequence[Dict[str, str]] = [{"extra": e} for e in extras]
for req_string in self.metadata.get_all("Requires-Dist", []):
# strip() because email.message.Message.get_all() may return a leading \n
# in case a long header was wrapped.
req = get_requirement(req_string.strip())
if not req.marker:
yield req
elif not extras and req.marker.evaluate({"extra": ""}):
yield req
elif any(req.marker.evaluate(context) for context in contexts):
yield req
|
