Source code for linuxdoc.lint

# SPDX-License-Identifier: AGPL-3.0-or-later
"""
lint
~~~~

Implementation of the :ref:`linuxdoc.lintdoc` command.

:copyright:  Copyright (C) 2023  Markus Heiser
:license:    AGPL-3.0-or-later; see LICENSE for details.

The command ``linuxdoc.lint`` *lint* the kernel-doc comments in the source
code::

    $ linuxdoc.lint --help

"""

import argparse
import sys

from fspath import FSPath

from . import kernel_doc

CMD = None

MSG = lambda msg: sys.__stderr__.write("INFO : %s\n" % msg)
ERR = lambda msg: sys.__stderr__.write("ERROR: %s\n" % msg)
FATAL = lambda msg: sys.__stderr__.write("FATAL: %s\n" % msg)

EPILOG = """This command uses the kernel-doc parser from the linuxdoc Sphinx
extension, for details see: https://return42.github.io/linuxdoc/cmd-line.html"""

DESCRIPTION = """Lint the kernel-doc markup comments in the source code files."""


def main():

    global CMD  # pylint: disable=global-statement

    cli = get_cli()
    CMD = cli.parse_args()

    kernel_doc.DEBUG = CMD.debug
    kernel_doc.VERBOSE = CMD.verbose

    if not CMD.srctree.EXISTS:
        ERR("%s does not exists or is not a folder" % CMD.srctree)
        sys.exit(42)

    if CMD.srctree.ISDIR:
        for fname in CMD.srctree.reMatchFind(r"^.*\.[ch]$"):
            lintdoc_file(fname)
    else:
        fname = CMD.srctree
        CMD.srctree = CMD.srctree.DIRNAME
        lintdoc_file(fname)


def get_cli():

    cli = argparse.ArgumentParser(
        description=(""),
        epilog=EPILOG,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
    )

    cli.add_argument(
        "srctree",
        help="File or folder of source code.",
        type=lambda x: FSPath(x).ABSPATH,
    )
    cli.add_argument(
        "--sloppy",
        action="store_true",
        help="Sloppy linting, reports only severe errors.",
    )
    cli.add_argument(
        "--markup",
        choices=["reST", "kernel-doc"],
        default="reST",
        help=(
            "Markup of the comments.  Change this option only if you know"
            " what you do. New comments must be marked up with reST!"
        ),
    )
    cli.add_argument(
        "--verbose",
        "-v",
        action="store_true",
        help="verbose output with log messages to stderr",
    )
    cli.add_argument("--debug", action="store_true", help="debug messages to stderr")
    return cli




def lintdoc_file(fname):
    "lint documentation from fname"

    fname = fname.relpath(CMD.srctree)
    opts = kernel_doc.ParseOptions(
        fname=fname,
        src_tree=CMD.srctree,
        verbose_warn=not (CMD.sloppy),
        markup=CMD.markup,
    )
    parser = kernel_doc.Parser(opts, kernel_doc.NullTranslator())
    try:
        parser.parse()
    except Exception:  # pylint: disable=broad-except
        FATAL("kernel-doc comments markup of %s seems buggy / can't parse" % opts.fname)