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1"""Contains the logic for all of the default options for Flake8."""
2from __future__ import annotations
3
4import argparse
5
6from flake8 import defaults
7from flake8.options.manager import OptionManager
8
9
10def stage1_arg_parser() -> argparse.ArgumentParser:
11 """Register the preliminary options on our OptionManager.
12
13 The preliminary options include:
14
15 - ``-v``/``--verbose``
16 - ``--output-file``
17 - ``--append-config``
18 - ``--config``
19 - ``--isolated``
20 - ``--enable-extensions``
21 """
22 parser = argparse.ArgumentParser(add_help=False)
23
24 parser.add_argument(
25 "-v",
26 "--verbose",
27 default=0,
28 action="count",
29 help="Print more information about what is happening in flake8. "
30 "This option is repeatable and will increase verbosity each "
31 "time it is repeated.",
32 )
33
34 parser.add_argument(
35 "--output-file", default=None, help="Redirect report to a file."
36 )
37
38 # Config file options
39
40 parser.add_argument(
41 "--append-config",
42 action="append",
43 default=[],
44 help="Provide extra config files to parse in addition to the files "
45 "found by Flake8 by default. These files are the last ones read "
46 "and so they take the highest precedence when multiple files "
47 "provide the same option.",
48 )
49
50 parser.add_argument(
51 "--config",
52 default=None,
53 help="Path to the config file that will be the authoritative config "
54 "source. This will cause Flake8 to ignore all other "
55 "configuration files.",
56 )
57
58 parser.add_argument(
59 "--isolated",
60 default=False,
61 action="store_true",
62 help="Ignore all configuration files.",
63 )
64
65 # Plugin enablement options
66
67 parser.add_argument(
68 "--enable-extensions",
69 help="Enable plugins and extensions that are otherwise disabled "
70 "by default",
71 )
72
73 parser.add_argument(
74 "--require-plugins",
75 help="Require specific plugins to be installed before running",
76 )
77
78 return parser
79
80
81class JobsArgument:
82 """Type callback for the --jobs argument."""
83
84 def __init__(self, arg: str) -> None:
85 """Parse and validate the --jobs argument.
86
87 :param arg: The argument passed by argparse for validation
88 """
89 self.is_auto = False
90 self.n_jobs = -1
91 if arg == "auto":
92 self.is_auto = True
93 elif arg.isdigit():
94 self.n_jobs = int(arg)
95 else:
96 raise argparse.ArgumentTypeError(
97 f"{arg!r} must be 'auto' or an integer.",
98 )
99
100 def __repr__(self) -> str:
101 """Representation for debugging."""
102 return f"{type(self).__name__}({str(self)!r})"
103
104 def __str__(self) -> str:
105 """Format our JobsArgument class."""
106 return "auto" if self.is_auto else str(self.n_jobs)
107
108
109def register_default_options(option_manager: OptionManager) -> None:
110 """Register the default options on our OptionManager.
111
112 The default options include:
113
114 - ``-q``/``--quiet``
115 - ``--color``
116 - ``--count``
117 - ``--exclude``
118 - ``--extend-exclude``
119 - ``--filename``
120 - ``--format``
121 - ``--hang-closing``
122 - ``--ignore``
123 - ``--extend-ignore``
124 - ``--per-file-ignores``
125 - ``--max-line-length``
126 - ``--max-doc-length``
127 - ``--indent-size``
128 - ``--select``
129 - ``--extend-select``
130 - ``--disable-noqa``
131 - ``--show-source``
132 - ``--statistics``
133 - ``--exit-zero``
134 - ``-j``/``--jobs``
135 - ``--tee``
136 - ``--benchmark``
137 - ``--bug-report``
138 """
139 add_option = option_manager.add_option
140
141 add_option(
142 "-q",
143 "--quiet",
144 default=0,
145 action="count",
146 parse_from_config=True,
147 help="Report only file names, or nothing. This option is repeatable.",
148 )
149
150 add_option(
151 "--color",
152 choices=("auto", "always", "never"),
153 default="auto",
154 help="Whether to use color in output. Defaults to `%(default)s`.",
155 )
156
157 add_option(
158 "--count",
159 action="store_true",
160 parse_from_config=True,
161 help="Print total number of errors to standard output after "
162 "all other output.",
163 )
164
165 add_option(
166 "--exclude",
167 metavar="patterns",
168 default=",".join(defaults.EXCLUDE),
169 comma_separated_list=True,
170 parse_from_config=True,
171 normalize_paths=True,
172 help="Comma-separated list of files or directories to exclude. "
173 "(Default: %(default)s)",
174 )
175
176 add_option(
177 "--extend-exclude",
178 metavar="patterns",
179 default="",
180 parse_from_config=True,
181 comma_separated_list=True,
182 normalize_paths=True,
183 help="Comma-separated list of files or directories to add to the list "
184 "of excluded ones.",
185 )
186
187 add_option(
188 "--filename",
189 metavar="patterns",
190 default="*.py",
191 parse_from_config=True,
192 comma_separated_list=True,
193 help="Only check for filenames matching the patterns in this comma-"
194 "separated list. (Default: %(default)s)",
195 )
196
197 add_option(
198 "--stdin-display-name",
199 default="stdin",
200 help="The name used when reporting errors from code passed via stdin. "
201 "This is useful for editors piping the file contents to flake8. "
202 "(Default: %(default)s)",
203 )
204
205 # TODO(sigmavirus24): Figure out --first/--repeat
206
207 # NOTE(sigmavirus24): We can't use choices for this option since users can
208 # freely provide a format string and that will break if we restrict their
209 # choices.
210 add_option(
211 "--format",
212 metavar="format",
213 default="default",
214 parse_from_config=True,
215 help=(
216 f"Format errors according to the chosen formatter "
217 f"({', '.join(sorted(option_manager.formatter_names))}) "
218 f"or a format string containing %%-style "
219 f"mapping keys (code, col, path, row, text). "
220 f"For example, "
221 f"``--format=pylint`` or ``--format='%%(path)s %%(code)s'``. "
222 f"(Default: %(default)s)"
223 ),
224 )
225
226 add_option(
227 "--hang-closing",
228 action="store_true",
229 parse_from_config=True,
230 help="Hang closing bracket instead of matching indentation of opening "
231 "bracket's line.",
232 )
233
234 add_option(
235 "--ignore",
236 metavar="errors",
237 parse_from_config=True,
238 comma_separated_list=True,
239 help=(
240 f"Comma-separated list of error codes to ignore (or skip). "
241 f"For example, ``--ignore=E4,E51,W234``. "
242 f"(Default: {','.join(defaults.IGNORE)})"
243 ),
244 )
245
246 add_option(
247 "--extend-ignore",
248 metavar="errors",
249 parse_from_config=True,
250 comma_separated_list=True,
251 help="Comma-separated list of error codes to add to the list of "
252 "ignored ones. For example, ``--extend-ignore=E4,E51,W234``.",
253 )
254
255 add_option(
256 "--per-file-ignores",
257 default="",
258 parse_from_config=True,
259 help="A pairing of filenames and violation codes that defines which "
260 "violations to ignore in a particular file. The filenames can be "
261 "specified in a manner similar to the ``--exclude`` option and the "
262 "violations work similarly to the ``--ignore`` and ``--select`` "
263 "options.",
264 )
265
266 add_option(
267 "--max-line-length",
268 type=int,
269 metavar="n",
270 default=defaults.MAX_LINE_LENGTH,
271 parse_from_config=True,
272 help="Maximum allowed line length for the entirety of this run. "
273 "(Default: %(default)s)",
274 )
275
276 add_option(
277 "--max-doc-length",
278 type=int,
279 metavar="n",
280 default=None,
281 parse_from_config=True,
282 help="Maximum allowed doc line length for the entirety of this run. "
283 "(Default: %(default)s)",
284 )
285 add_option(
286 "--indent-size",
287 type=int,
288 metavar="n",
289 default=defaults.INDENT_SIZE,
290 parse_from_config=True,
291 help="Number of spaces used for indentation (Default: %(default)s)",
292 )
293
294 add_option(
295 "--select",
296 metavar="errors",
297 parse_from_config=True,
298 comma_separated_list=True,
299 help=(
300 "Limit the reported error codes to codes prefix-matched by this "
301 "list. "
302 "You usually do not need to specify this option as the default "
303 "includes all installed plugin codes. "
304 "For example, ``--select=E4,E51,W234``."
305 ),
306 )
307
308 add_option(
309 "--extend-select",
310 metavar="errors",
311 parse_from_config=True,
312 comma_separated_list=True,
313 help=(
314 "Add additional error codes to the default ``--select``. "
315 "You usually do not need to specify this option as the default "
316 "includes all installed plugin codes. "
317 "For example, ``--extend-select=E4,E51,W234``."
318 ),
319 )
320
321 add_option(
322 "--disable-noqa",
323 default=False,
324 parse_from_config=True,
325 action="store_true",
326 help='Disable the effect of "# noqa". This will report errors on '
327 'lines with "# noqa" at the end.',
328 )
329
330 # TODO(sigmavirus24): Decide what to do about --show-pep8
331
332 add_option(
333 "--show-source",
334 action="store_true",
335 parse_from_config=True,
336 help="Show the source generate each error or warning.",
337 )
338 add_option(
339 "--no-show-source",
340 action="store_false",
341 dest="show_source",
342 parse_from_config=False,
343 help="Negate --show-source",
344 )
345
346 add_option(
347 "--statistics",
348 action="store_true",
349 parse_from_config=True,
350 help="Count errors.",
351 )
352
353 # Flake8 options
354
355 add_option(
356 "--exit-zero",
357 action="store_true",
358 help='Exit with status code "0" even if there are errors.',
359 )
360
361 add_option(
362 "-j",
363 "--jobs",
364 default="auto",
365 parse_from_config=True,
366 type=JobsArgument,
367 help="Number of subprocesses to use to run checks in parallel. "
368 'This is ignored on Windows. The default, "auto", will '
369 "auto-detect the number of processors available to use. "
370 "(Default: %(default)s)",
371 )
372
373 add_option(
374 "--tee",
375 default=False,
376 parse_from_config=True,
377 action="store_true",
378 help="Write to stdout and output-file.",
379 )
380
381 # Benchmarking
382
383 add_option(
384 "--benchmark",
385 default=False,
386 action="store_true",
387 help="Print benchmark information about this run of Flake8",
388 )
389
390 # Debugging
391
392 add_option(
393 "--bug-report",
394 action="store_true",
395 help="Print information necessary when preparing a bug report",
396 )