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1"""Extensions to the 'distutils' for large or complex distributions"""
2
3import functools
4import os
5import re
6import warnings
7
8import _distutils_hack.override # noqa: F401
9
10import distutils.core
11from distutils.errors import DistutilsOptionError
12from distutils.util import convert_path as _convert_path
13
14from ._deprecation_warning import SetuptoolsDeprecationWarning
15
16import setuptools.version
17from setuptools.extension import Extension
18from setuptools.dist import Distribution
19from setuptools.depends import Require
20from setuptools.discovery import PackageFinder, PEP420PackageFinder
21from . import monkey
22from . import logging
23
24
25__all__ = [
26 'setup',
27 'Distribution',
28 'Command',
29 'Extension',
30 'Require',
31 'SetuptoolsDeprecationWarning',
32 'find_packages',
33 'find_namespace_packages',
34]
35
36__version__ = setuptools.version.__version__
37
38bootstrap_install_from = None
39
40
41find_packages = PackageFinder.find
42find_namespace_packages = PEP420PackageFinder.find
43
44
45def _install_setup_requires(attrs):
46 # Note: do not use `setuptools.Distribution` directly, as
47 # our PEP 517 backend patch `distutils.core.Distribution`.
48 class MinimalDistribution(distutils.core.Distribution):
49 """
50 A minimal version of a distribution for supporting the
51 fetch_build_eggs interface.
52 """
53
54 def __init__(self, attrs):
55 _incl = 'dependency_links', 'setup_requires'
56 filtered = {k: attrs[k] for k in set(_incl) & set(attrs)}
57 super().__init__(filtered)
58 # Prevent accidentally triggering discovery with incomplete set of attrs
59 self.set_defaults._disable()
60
61 def _get_project_config_files(self, filenames=None):
62 """Ignore ``pyproject.toml``, they are not related to setup_requires"""
63 try:
64 cfg, toml = super()._split_standard_project_metadata(filenames)
65 return cfg, ()
66 except Exception:
67 return filenames, ()
68
69 def finalize_options(self):
70 """
71 Disable finalize_options to avoid building the working set.
72 Ref #2158.
73 """
74
75 dist = MinimalDistribution(attrs)
76
77 # Honor setup.cfg's options.
78 dist.parse_config_files(ignore_option_errors=True)
79 if dist.setup_requires:
80 _fetch_build_eggs(dist)
81
82
83def _fetch_build_eggs(dist):
84 try:
85 dist.fetch_build_eggs(dist.setup_requires)
86 except Exception as ex:
87 msg = """
88 It is possible a package already installed in your system
89 contains an version that is invalid according to PEP 440.
90 You can try `pip install --use-pep517` as a workaround for this problem,
91 or rely on a new virtual environment.
92
93 If the problem refers to a package that is not installed yet,
94 please contact that package's maintainers or distributors.
95 """
96 if "InvalidVersion" in ex.__class__.__name__:
97 if hasattr(ex, "add_note"):
98 ex.add_note(msg) # PEP 678
99 else:
100 dist.announce(f"\n{msg}\n")
101 raise
102
103
104def setup(**attrs):
105 # Make sure we have any requirements needed to interpret 'attrs'.
106 logging.configure()
107 _install_setup_requires(attrs)
108 return distutils.core.setup(**attrs)
109
110
111setup.__doc__ = distutils.core.setup.__doc__
112
113
114_Command = monkey.get_unpatched(distutils.core.Command)
115
116
117class Command(_Command):
118 """
119 Setuptools internal actions are organized using a *command design pattern*.
120 This means that each action (or group of closely related actions) executed during
121 the build should be implemented as a ``Command`` subclass.
122
123 These commands are abstractions and do not necessarily correspond to a command that
124 can (or should) be executed via a terminal, in a CLI fashion (although historically
125 they would).
126
127 When creating a new command from scratch, custom defined classes **SHOULD** inherit
128 from ``setuptools.Command`` and implement a few mandatory methods.
129 Between these mandatory methods, are listed:
130
131 .. method:: initialize_options(self)
132
133 Set or (reset) all options/attributes/caches used by the command
134 to their default values. Note that these values may be overwritten during
135 the build.
136
137 .. method:: finalize_options(self)
138
139 Set final values for all options/attributes used by the command.
140 Most of the time, each option/attribute/cache should only be set if it does not
141 have any value yet (e.g. ``if self.attr is None: self.attr = val``).
142
143 .. method:: run(self)
144
145 Execute the actions intended by the command.
146 (Side effects **SHOULD** only take place when ``run`` is executed,
147 for example, creating new files or writing to the terminal output).
148
149 A useful analogy for command classes is to think of them as subroutines with local
150 variables called "options". The options are "declared" in ``initialize_options()``
151 and "defined" (given their final values, aka "finalized") in ``finalize_options()``,
152 both of which must be defined by every command class. The "body" of the subroutine,
153 (where it does all the work) is the ``run()`` method.
154 Between ``initialize_options()`` and ``finalize_options()``, ``setuptools`` may set
155 the values for options/attributes based on user's input (or circumstance),
156 which means that the implementation should be careful to not overwrite values in
157 ``finalize_options`` unless necessary.
158
159 Please note that other commands (or other parts of setuptools) may also overwrite
160 the values of the command's options/attributes multiple times during the build
161 process.
162 Therefore it is important to consistently implement ``initialize_options()`` and
163 ``finalize_options()``. For example, all derived attributes (or attributes that
164 depend on the value of other attributes) **SHOULD** be recomputed in
165 ``finalize_options``.
166
167 When overwriting existing commands, custom defined classes **MUST** abide by the
168 same APIs implemented by the original class. They also **SHOULD** inherit from the
169 original class.
170 """
171
172 command_consumes_arguments = False
173
174 def __init__(self, dist, **kw):
175 """
176 Construct the command for dist, updating
177 vars(self) with any keyword parameters.
178 """
179 super().__init__(dist)
180 vars(self).update(kw)
181
182 def _ensure_stringlike(self, option, what, default=None):
183 val = getattr(self, option)
184 if val is None:
185 setattr(self, option, default)
186 return default
187 elif not isinstance(val, str):
188 raise DistutilsOptionError(
189 "'%s' must be a %s (got `%s`)" % (option, what, val)
190 )
191 return val
192
193 def ensure_string_list(self, option):
194 r"""Ensure that 'option' is a list of strings. If 'option' is
195 currently a string, we split it either on /,\s*/ or /\s+/, so
196 "foo bar baz", "foo,bar,baz", and "foo, bar baz" all become
197 ["foo", "bar", "baz"].
198
199 ..
200 TODO: This method seems to be similar to the one in ``distutils.cmd``
201 Probably it is just here for backward compatibility with old Python versions?
202
203 :meta private:
204 """
205 val = getattr(self, option)
206 if val is None:
207 return
208 elif isinstance(val, str):
209 setattr(self, option, re.split(r',\s*|\s+', val))
210 else:
211 if isinstance(val, list):
212 ok = all(isinstance(v, str) for v in val)
213 else:
214 ok = False
215 if not ok:
216 raise DistutilsOptionError(
217 "'%s' must be a list of strings (got %r)" % (option, val)
218 )
219
220 def reinitialize_command(self, command, reinit_subcommands=0, **kw):
221 cmd = _Command.reinitialize_command(self, command, reinit_subcommands)
222 vars(cmd).update(kw)
223 return cmd
224
225
226def _find_all_simple(path):
227 """
228 Find all files under 'path'
229 """
230 results = (
231 os.path.join(base, file)
232 for base, dirs, files in os.walk(path, followlinks=True)
233 for file in files
234 )
235 return filter(os.path.isfile, results)
236
237
238def findall(dir=os.curdir):
239 """
240 Find all files under 'dir' and return the list of full filenames.
241 Unless dir is '.', return full filenames with dir prepended.
242 """
243 files = _find_all_simple(dir)
244 if dir == os.curdir:
245 make_rel = functools.partial(os.path.relpath, start=dir)
246 files = map(make_rel, files)
247 return list(files)
248
249
250@functools.wraps(_convert_path)
251def convert_path(pathname):
252 from inspect import cleandoc
253
254 msg = """
255 The function `convert_path` is considered internal and not part of the public API.
256 Its direct usage by 3rd-party packages is considered deprecated and the function
257 may be removed in the future.
258 """
259 warnings.warn(cleandoc(msg), SetuptoolsDeprecationWarning)
260 return _convert_path(pathname)
261
262
263class sic(str):
264 """Treat this string as-is (https://en.wikipedia.org/wiki/Sic)"""
265
266
267# Apply monkey patches
268monkey.patch_all()