Source code for flake8.main.options

"""Contains the logic for all of the default options for Flake8."""
import argparse
import functools

from flake8 import defaults
from flake8.main import debug
from flake8.main import vcs

def register_preliminary_options(parser):
    # type: (argparse.ArgumentParser) -> None
    """Register the preliminary options on our OptionManager.

    The preliminary options include:

    - ``-v``/``--verbose``
    - ``--output-file``
    - ``--append-config``
    - ``--config``
    - ``--isolated``
    add_argument = parser.add_argument

        help="Print more information about what is happening in flake8."
        " This option is repeatable and will increase verbosity each "
        "time it is repeated.",

        "--output-file", default=None, help="Redirect report to a file."

    # Config file options

        help="Provide extra config files to parse in addition to the files "
        "found by Flake8 by default. These files are the last ones read "
        "and so they take the highest precedence when multiple files "
        "provide the same option.",

        help="Path to the config file that will be the authoritative config "
        "source. This will cause Flake8 to ignore all other "
        "configuration files.",

        help="Ignore all configuration files.",

class JobsArgument:
    """Type callback for the --jobs argument."""

    def __init__(self, arg):  # type: (str) -> None
        """Parse and validate the --jobs argument.

        :param str arg:
            The argument passed by argparse for validation
        self.is_auto = False
        self.n_jobs = -1
        if arg == "auto":
            self.is_auto = True
        elif arg.isdigit():
            self.n_jobs = int(arg)
            raise argparse.ArgumentTypeError(
                "{!r} must be 'auto' or an integer.".format(arg),

    def __str__(self):
        """Format our JobsArgument class."""
        return "auto" if self.is_auto else str(self.n_jobs)

[docs]def register_default_options(option_manager): """Register the default options on our OptionManager. The default options include: - ``-q``/``--quiet`` - ``--count`` - ``--diff`` - ``--exclude`` - ``--extend-exclude`` - ``--filename`` - ``--format`` - ``--hang-closing`` - ``--ignore`` - ``--extend-ignore`` - ``--per-file-ignores`` - ``--max-line-length`` - ``--max-doc-length`` - ``--select`` - ``--disable-noqa`` - ``--show-source`` - ``--statistics`` - ``--enable-extensions`` - ``--exit-zero`` - ``-j``/``--jobs`` - ``--tee`` - ``--benchmark`` - ``--bug-report`` """ add_option = option_manager.add_option # pep8 options add_option( "-q", "--quiet", default=0, action="count", parse_from_config=True, help="Report only file names, or nothing. This option is repeatable.", ) add_option( "--count", action="store_true", parse_from_config=True, help="Print total number of errors and warnings to standard error and" " set the exit code to 1 if total is not empty.", ) add_option( "--diff", action="store_true", help="Report changes only within line number ranges in the unified " "diff provided on standard in by the user.", ) add_option( "--exclude", metavar="patterns", default=",".join(defaults.EXCLUDE), comma_separated_list=True, parse_from_config=True, normalize_paths=True, help="Comma-separated list of files or directories to exclude." " (Default: %(default)s)", ) add_option( "--extend-exclude", metavar="patterns", default="", parse_from_config=True, comma_separated_list=True, normalize_paths=True, help="Comma-separated list of files or directories to add to the list" " of excluded ones.", ) add_option( "--filename", metavar="patterns", default="*.py", parse_from_config=True, comma_separated_list=True, help="Only check for filenames matching the patterns in this comma-" "separated list. (Default: %(default)s)", ) add_option( "--stdin-display-name", default="stdin", help="The name used when reporting errors from code passed via stdin." " This is useful for editors piping the file contents to flake8." " (Default: %(default)s)", ) # TODO(sigmavirus24): Figure out --first/--repeat # NOTE(sigmavirus24): We can't use choices for this option since users can # freely provide a format string and that will break if we restrict their # choices. add_option( "--format", metavar="format", default="default", parse_from_config=True, help="Format errors according to the chosen formatter.", ) add_option( "--hang-closing", action="store_true", parse_from_config=True, help="Hang closing bracket instead of matching indentation of opening" " bracket's line.", ) add_option( "--ignore", metavar="errors", default=",".join(defaults.IGNORE), parse_from_config=True, comma_separated_list=True, help="Comma-separated list of errors and warnings to ignore (or skip)." " For example, ``--ignore=E4,E51,W234``. (Default: %(default)s)", ) add_option( "--extend-ignore", metavar="errors", default="", parse_from_config=True, comma_separated_list=True, help="Comma-separated list of errors and warnings to add to the list" " of ignored ones. For example, ``--extend-ignore=E4,E51,W234``.", ) add_option( "--per-file-ignores", default="", parse_from_config=True, help="A pairing of filenames and violation codes that defines which " "violations to ignore in a particular file. The filenames can be " "specified in a manner similar to the ``--exclude`` option and the " "violations work similarly to the ``--ignore`` and ``--select`` " "options.", ) add_option( "--max-line-length", type=int, metavar="n", default=defaults.MAX_LINE_LENGTH, parse_from_config=True, help="Maximum allowed line length for the entirety of this run. " "(Default: %(default)s)", ) add_option( "--max-doc-length", type=int, metavar="n", default=None, parse_from_config=True, help="Maximum allowed doc line length for the entirety of this run. " "(Default: %(default)s)", ) add_option( "--select", metavar="errors", default=",".join(defaults.SELECT), parse_from_config=True, comma_separated_list=True, help="Comma-separated list of errors and warnings to enable." " For example, ``--select=E4,E51,W234``. (Default: %(default)s)", ) add_option( "--disable-noqa", default=False, parse_from_config=True, action="store_true", help='Disable the effect of "# noqa". This will report errors on ' 'lines with "# noqa" at the end.', ) # TODO(sigmavirus24): Decide what to do about --show-pep8 add_option( "--show-source", action="store_true", parse_from_config=True, help="Show the source generate each error or warning.", ) add_option( "--statistics", action="store_true", parse_from_config=True, help="Count errors and warnings.", ) # Flake8 options add_option( "--enable-extensions", default="", parse_from_config=True, comma_separated_list=True, help="Enable plugins and extensions that are otherwise disabled " "by default", ) add_option( "--exit-zero", action="store_true", help='Exit with status code "0" even if there are errors.', ) add_option( "--install-hook", action=vcs.InstallAction, choices=vcs.choices(), help="Install a hook that is run prior to a commit for the supported " "version control system.", ) add_option( "-j", "--jobs", default="auto", parse_from_config=True, type=JobsArgument, help="Number of subprocesses to use to run checks in parallel. " 'This is ignored on Windows. The default, "auto", will ' "auto-detect the number of processors available to use." " (Default: %(default)s)", ) add_option( "--tee", default=False, parse_from_config=True, action="store_true", help="Write to stdout and output-file.", ) # Benchmarking add_option( "--benchmark", default=False, action="store_true", help="Print benchmark information about this run of Flake8", ) # Debugging add_option( "--bug-report", action=functools.partial( debug.DebugAction, option_manager=option_manager ), nargs=0, help="Print information necessary when preparing a bug report", )