GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. 401' href='#n401'>401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 
#!/usr/bin/python3
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2018, Google Inc.
#
# Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
#
# checkstyle.py - A patch style checker script based on clang-format
#
# TODO:
#
# - Support other formatting tools and checkers (cppcheck, cpplint, kwstyle, ...)
# - Split large hunks to minimize context noise
# - Improve style issues counting
#

import argparse
import difflib
import fnmatch
import os.path
import re
import shutil
import subprocess
import sys

dependencies = {
    'clang-format': True,
    'git': True,
}

# ------------------------------------------------------------------------------
# Colour terminal handling
#

class Colours:
    Default = 0
    Black = 0
    Red = 31
    Green = 32
    Yellow = 33
    Blue = 34
    Magenta = 35
    Cyan = 36
    LightGrey = 37
    DarkGrey = 90
    LightRed = 91
    LightGreen = 92
    Lightyellow = 93
    LightBlue = 94
    LightMagenta = 95
    LightCyan = 96
    White = 97

    @staticmethod
    def fg(colour):
        if sys.stdout.isatty():
            return '\033[%um' % colour
        else:
            return ''

    @staticmethod
    def bg(colour):
        if sys.stdout.isatty():
            return '\033[%um' % (colour + 10)
        else:
            return ''

    @staticmethod
    def reset():
        if sys.stdout.isatty():
            return '\033[0m'
        else:
            return ''


# ------------------------------------------------------------------------------
# Diff parsing, handling and printing
#

class DiffHunkSide(object):
    """A side of a diff hunk, recording line numbers"""
    def __init__(self, start):
        self.start = start
        self.touched = []
        self.untouched = []

    def __len__(self):
        return len(self.touched) + len(self.untouched)


class DiffHunk(object):
    diff_header_regex = re.compile(r'@@ -([0-9]+),?([0-9]+)? \+([0-9]+),?([0-9]+)? @@')

    def __init__(self, line):
        match = DiffHunk.diff_header_regex.match(line)
        if not match:
            raise RuntimeError("Malformed diff hunk header '%s'" % line)

        self.__from_line = int(match.group(1))
        self.__to_line = int(match.group(3))
        self.__from = DiffHunkSide(self.__from_line)
        self.__to = DiffHunkSide(self.__to_line)

        self.lines = []

    def __repr__(self):
        s = '%s@@ -%u,%u +%u,%u @@\n' % \
                (Colours.fg(Colours.Cyan),
                 self.__from.start, len(self.__from),
                 self.__to.start, len(self.__to))

        for line in self.lines:
            if line[0] == '-':
                s += Colours.fg(Colours.Red)
            elif line[0] == '+':
                s += Colours.fg(Colours.Green)

            if line[0] == '-':
                spaces = 0
                for i in range(len(line)):
                    if line[-i-1].isspace():
                        spaces += 1
                    else:
                        break
                spaces = len(line) - spaces
                line = line[0:spaces] + Colours.bg(Colours.Red) + line[spaces:]

            s += line
            s += Colours.reset()
            s += '\n'

        return s[:-1]

    def append(self, line):
        if line[0] == ' ':
            self.__from.untouched.append(self.__from_line)
            self.__from_line += 1
            self.__to.untouched.append(self.__to_line)
            self.__to_line += 1
        elif line[0] == '-':
            self.__from.touched.append(self.__from_line)
            self.__from_line += 1
        elif line[0] == '+':
            self.__to.touched.append(self.__to_line)
            self.__to_line += 1

        self.lines.append(line.rstrip('\n'))

    def intersects(self, lines):
        for line in lines:
            if line in self.__from.touched:
                return True
        return False

    def side(self, side):
        if side == 'from':
            return self.__from
        else:
            return self.__to


def parse_diff(diff):
    hunks = []
    hunk = None
    for line in diff:
        if line.startswith('@@'):
            if hunk:
                hunks.append(hunk)
            hunk = DiffHunk(line)

        elif hunk is not None:
            hunk.append(line)

    if hunk:
        hunks.append(hunk)

    return hunks


# ------------------------------------------------------------------------------
# Commit, Staged Changes & Amendments
#

class CommitFile:
    def __init__(self, name):
        info = name.split()
        self.__status = info[0][0]

        # For renamed files, store the new name
        if self.__status == 'R':
            self.__filename = info[2]
        else:
            self.__filename = info[1]

    @property
    def filename(self):
        return self.__filename

    @property
    def status(self):
        return self.__status


class Commit:
    def __init__(self, commit):
        self.commit = commit
        self._parse()

    def _parse(self):
        # Get the commit title and list of files.
        ret = subprocess.run(['git', 'show', '--pretty=oneline', '--name-status',
                              self.commit],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        files = ret.splitlines()
        self._files = [CommitFile(f) for f in files[1:]]
        self._title = files[0]

    def files(self, filter='AMR'):
        return [f.filename for f in self._files if f.status in filter]

    @property
    def title(self):
        return self._title

    def get_diff(self, top_level, filename):
        diff = subprocess.run(['git', 'diff', '%s~..%s' % (self.commit, self.commit),
                               '--', '%s/%s' % (top_level, filename)],
                              stdout=subprocess.PIPE).stdout.decode('utf-8')
        return parse_diff(diff.splitlines(True))

    def get_file(self, filename):
        return subprocess.run(['git', 'show', '%s:%s' % (self.commit, filename)],
                              stdout=subprocess.PIPE).stdout.decode('utf-8')


class StagedChanges(Commit):
    def __init__(self):
        Commit.__init__(self, '')

    def _parse(self):
        ret = subprocess.run(['git', 'diff', '--staged', '--name-status'],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        self._title = "Staged changes"
        self._files = [CommitFile(f) for f in ret.splitlines()]

    def get_diff(self, top_level, filename):
        diff = subprocess.run(['git', 'diff', '--staged', '--',
                               '%s/%s' % (top_level, filename)],
                              stdout=subprocess.PIPE).stdout.decode('utf-8')
        return parse_diff(diff.splitlines(True))


class Amendment(StagedChanges):
    def __init__(self):
        StagedChanges.__init__(self)

    def _parse(self):
        # Create a title using HEAD commit
        ret = subprocess.run(['git', 'show', '--pretty=oneline', '--no-patch'],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        self._title = 'Amendment of ' + ret.strip()
        # Extract the list of modified files
        ret = subprocess.run(['git', 'diff', '--staged', '--name-status', 'HEAD~'],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        self._files = [CommitFile(f) for f in ret.splitlines()]

    def get_diff(self, top_level, filename):
        diff = subprocess.run(['git', 'diff', '--staged', 'HEAD~', '--',
                               '%s/%s' % (top_level, filename)],
                              stdout=subprocess.PIPE).stdout.decode('utf-8')
        return parse_diff(diff.splitlines(True))


# ------------------------------------------------------------------------------
# Helpers
#

class ClassRegistry(type):
    def __new__(cls, clsname, bases, attrs):
        newclass = super().__new__(cls, clsname, bases, attrs)
        if bases:
            bases[0].subclasses.append(newclass)
        return newclass


# ------------------------------------------------------------------------------
# Commit Checkers
#

class CommitChecker(metaclass=ClassRegistry):
    subclasses = []

    def __init__(self):
        pass

    #
    # Class methods
    #
    @classmethod
    def checkers(cls):
        for checker in cls.subclasses:
            yield checker


class CommitIssue(object):
    def __init__(self, msg):
        self.msg = msg


class HeaderAddChecker(CommitChecker):
    @classmethod
    def check(cls, commit, top_level):
        issues = []

        meson_files = [f for f in commit.files('M')
                       if os.path.basename(f) == 'meson.build']

        for filename in commit.files('AR'):
            if not filename.startswith('include/libcamera/') or \
               not filename.endswith('.h'):
                continue

            meson = os.path.dirname(filename) + '/meson.build'
            header = os.path.basename(filename)

            issue = CommitIssue('Header %s added without corresponding update to %s' %
                                (filename, meson))

            if meson not in meson_files:
                issues.append(issue)
                continue

            diff = commit.get_diff(top_level, meson)
            found = False

            for hunk in diff:
                for line in hunk.lines:
                    if line[0] != '+':
                        continue

                    if line.find("'%s'" % header) != -1:
                        found = True
                        break

                if found:
                    break

            if not found:
                issues.append(issue)

        return issues


# ------------------------------------------------------------------------------
# Style Checkers
#

class StyleChecker(metaclass=ClassRegistry):
    subclasses = []

    def __init__(self):
        pass

    #
    # Class methods
    #
    @classmethod
    def checkers(cls, filename):
        for checker in cls.subclasses:
            if checker.supports(filename):
                yield checker

    @classmethod
    def supports(cls, filename):
        for pattern in cls.patterns:
            if fnmatch.fnmatch(os.path.basename(filename), pattern):
                return True
        return False

    @classmethod
    def all_patterns(cls):
        patterns = set()
        for checker in cls.subclasses:
            patterns.update(checker.patterns)

        return patterns


class StyleIssue(object):
    def __init__(self, line_number, line, msg):
        self.line_number = line_number
        self.line = line
        self.msg = msg


class IncludeChecker(StyleChecker):
    patterns = ('*.cpp', '*.h')

    headers = ('assert', 'ctype', 'errno', 'fenv', 'float', 'inttypes',
               'limits', 'locale', 'setjmp', 'signal', 'stdarg', 'stddef',
               'stdint', 'stdio', 'stdlib', 'string', 'time', 'uchar', 'wchar',
               'wctype')
    include_regex = re.compile('^#include <c([a-z]*)>')

    def __init__(self, content):
        super().__init__()
        self.__content = content

    def check(self, line_numbers):
        issues = []

        for line_number in line_numbers:
            line = self.__content[line_number - 1]
            match = IncludeChecker.include_regex.match(line)
            if not match:
                continue

            header = match.group(1)
            if header not in IncludeChecker.headers:
                continue

            issues.append(StyleIssue(line_number, line,
                                     'C compatibility header <%s.h> is preferred' % header))

        return issues


class LogCategoryChecker(StyleChecker):
    log_regex = re.compile('\\bLOG\((Debug|Info|Warning|Error|Fatal)\)')
    patterns = ('*.cpp',)

    def __init__(self, content):
        super().__init__()
        self.__content = content

    def check(self, line_numbers):
        issues = []
        for line_number in line_numbers:
            line = self.__content[line_number-1]
            if not LogCategoryChecker.log_regex.search(line):
                continue

            issues.append(StyleIssue(line_number, line, 'LOG() should use categories'))

        return issues


class MesonChecker(StyleChecker):
    patterns = ('meson.build',)

    def __init__(self, content):
        super().__init__()
        self.__content = content

    def check(self, line_numbers):
        issues = []
        for line_number in line_numbers:
            line = self.__content[line_number-1]
            if line.find('\t') != -1:
                issues.append(StyleIssue(line_number, line, 'meson.build should use spaces for indentation'))
        return issues


class Pep8Checker(StyleChecker):
    patterns = ('*.py',)
    results_regex = re.compile('stdin:([0-9]+):([0-9]+)(.*)')

    def __init__(self, content):
        super().__init__()
        self.__content = content

    def check(self, line_numbers):
        issues = []
        data = ''.join(self.__content).encode('utf-8')

        try:
            ret = subprocess.run(['pycodestyle', '--ignore=E501', '-'],
                                 input=data, stdout=subprocess.PIPE)
        except FileNotFoundError:
            issues.append(StyleIssue(0, None, "Please install pycodestyle to validate python additions"))
            return issues

        results = ret.stdout.decode('utf-8').splitlines()
        for item in results:
            search = re.search(Pep8Checker.results_regex, item)
            line_number = int(search.group(1))
            position = int(search.group(2))
            msg = search.group(3)

            if line_number in line_numbers:
                line = self.__content[line_number - 1]
                issues.append(StyleIssue(line_number, line, msg))

        return issues


class ShellChecker(StyleChecker):
    patterns = ('*.sh',)
    results_line_regex = re.compile('In - line ([0-9]+):')

    def __init__(self, content):
        super().__init__()
        self.__content = content

    def check(self, line_numbers):
        issues = []
        data = ''.join(self.__content).encode('utf-8')

        try:
            ret = subprocess.run(['shellcheck', '-Cnever', '-'],
                                 input=data, stdout=subprocess.PIPE)
        except FileNotFoundError:
            issues.append(StyleIssue(0, None, "Please install shellcheck to validate shell script additions"))
            return issues

        results = ret.stdout.decode('utf-8').splitlines()
        for nr, item in enumerate(results):
            search = re.search(ShellChecker.results_line_regex, item)
            if search is None:
                continue

            line_number = int(search.group(1))
            line = results[nr + 1]
            msg = results[nr + 2]

            # Determined, but not yet used
            position = msg.find('^') + 1

            if line_number in line_numbers:
                issues.append(StyleIssue(line_number, line, msg))

        return issues


# ------------------------------------------------------------------------------
# Formatters
#

class Formatter(metaclass=ClassRegistry):
    subclasses = []

    def __init__(self):
        pass

    #
    # Class methods
    #
    @classmethod
    def formatters(cls, filename):
        for formatter in cls.subclasses:
            if formatter.supports(filename):
                yield formatter

    @classmethod
    def supports(cls, filename):
        for pattern in cls.patterns:
            if fnmatch.fnmatch(os.path.basename(filename), pattern):
                return True
        return False

    @classmethod
    def all_patterns(cls):
        patterns = set()
        for formatter in cls.subclasses:
            patterns.update(formatter.patterns)

        return patterns


class CLangFormatter(Formatter):
    patterns = ('*.c', '*.cpp', '*.h')

    @classmethod
    def format(cls, filename, data):
        ret = subprocess.run(['clang-format', '-style=file',
                              '-assume-filename=' + filename],
                             input=data.encode('utf-8'), stdout=subprocess.PIPE)
        return ret.stdout.decode('utf-8')


class DoxygenFormatter(Formatter):
    patterns = ('*.c', '*.cpp')

    return_regex = re.compile(' +\\* +\\\\return +[a-z]')

    @classmethod
    def format(cls, filename, data):
        lines = []
        in_doxygen = False

        for line in data.split('\n'):
            if line.find('/**') != -1:
                in_doxygen = True

            if not in_doxygen:
                lines.append(line)
                continue

            line = cls.return_regex.sub(lambda m: m.group(0)[:-1] + m.group(0)[-1].upper(), line)

            if line.find('*/') != -1:
                in_doxygen = False

            lines.append(line)

        return '\n'.join(lines)


class DPointerFormatter(Formatter):
    # Ensure consistent naming of variables related to the d-pointer design
    # pattern.
    patterns = ('*.cpp', '*.h')

    # The clang formatter runs first, we can thus rely on appropriate coding
    # style.
    declare_regex = re.compile(r'^(\t*)(const )?([a-zA-Z0-9_]+) \*( ?const )?([a-zA-Z0-9_]+) = (LIBCAMERA_[DO]_PTR)\(([a-zA-Z0-9_]+)\);$')

    @classmethod
    def format(cls, filename, data):
        lines = []

        for line in data.split('\n'):
            match = cls.declare_regex.match(line)
            if match:
                indent = match.group(1) or ''
                const = match.group(2) or ''
                macro = match.group(6)
                klass = match.group(7)
                if macro == 'LIBCAMERA_D_PTR':
                    var = 'Private *const d'
                else:
                    var = f'{klass} *const o'

                line = f'{indent}{const}{var} = {macro}({klass});'

            lines.append(line)

        return '\n'.join(lines)


class IncludeOrderFormatter(Formatter):
    patterns = ('*.cpp', '*.h')

    include_regex = re.compile('^#include ["<]([^">]*)[">]')

    @classmethod
    def format(cls, filename, data):
        lines = []
        includes = []

        # Parse blocks of #include statements, and output them as a sorted list
        # when we reach a non #include statement.
        for line in data.split('\n'):
            match = IncludeOrderFormatter.include_regex.match(line)
            if match:
                # If the current line is an #include statement, add it to the
                # includes group and continue to the next line.
                includes.append((line, match.group(1)))
                continue

            # The current line is not an #include statement, output the sorted
            # stashed includes first, and then the current line.
            if len(includes):
                includes.sort(key=lambda i: i[1])
                for include in includes:
                    lines.append(include[0])
                includes = []

            lines.append(line)

        # In the unlikely case the file ends with an #include statement, make
        # sure we output the stashed includes.
        if len(includes):
            includes.sort(key=lambda i: i[1])
            for include in includes:
                lines.append(include[0])
            includes = []

        return '\n'.join(lines)


class StripTrailingSpaceFormatter(Formatter):
    patterns = ('*.c', '*.cpp', '*.h', '*.py', 'meson.build')

    @classmethod
    def format(cls, filename, data):
        lines = data.split('\n')
        for i in range(len(lines)):
            lines[i] = lines[i].rstrip() + '\n'
        return ''.join(lines)


# ------------------------------------------------------------------------------
# Style checking
#

def check_file(top_level, commit, filename):
    # Extract the line numbers touched by the commit.
    commit_diff = commit.get_diff(top_level, filename)

    lines = []
    for hunk in commit_diff:
        lines.extend(hunk.side('to').touched)

    # Skip commits that don't add any line.
    if len(lines) == 0:
        return 0

    # Format the file after the commit with all formatters and compute the diff
    # between the unformatted and formatted contents.
    after = commit.get_file(filename)

    formatted = after
    for formatter in Formatter.formatters(filename):
        formatted = formatter.format(filename, formatted)

    after = after.splitlines(True)
    formatted = formatted.splitlines(True)
    diff = difflib.unified_diff(after, formatted)

    # Split the diff in hunks, recording line number ranges for each hunk, and
    # filter out hunks that are not touched by the commit.
    formatted_diff = parse_diff(diff)
    formatted_diff = [hunk for hunk in formatted_diff if hunk.intersects(lines)]

    # Check for code issues not related to formatting.
    issues = []
    for checker in StyleChecker.checkers(filename):
        checker = checker(after)
        for hunk in commit_diff:
            issues += checker.check(hunk.side('to').touched)

    # Print the detected issues.
    if len(issues) == 0 and len(formatted_diff) == 0:
        return 0

    print('%s---' % Colours.fg(Colours.Red), filename)
    print('%s+++' % Colours.fg(Colours.Green), filename)

    if len(formatted_diff):
        for hunk in formatted_diff:
            print(hunk)

    if len(issues):
        issues = sorted(issues, key=lambda i: i.line_number)
        for issue in issues:
            print('%s#%u: %s' % (Colours.fg(Colours.Yellow), issue.line_number, issue.msg))
            if issue.line is not None:
                print('+%s%s' % (issue.line.rstrip(), Colours.reset()))

    return len(formatted_diff) + len(issues)


def check_style(top_level, commit):
    separator = '-' * len(commit.title)
    print(separator)
    print(commit.title)
    print(separator)

    issues = 0

    # Apply the commit checkers first.
    for checker in CommitChecker.checkers():
        for issue in checker.check(commit, top_level):
            print('%s%s%s' % (Colours.fg(Colours.Yellow), issue.msg, Colours.reset()))
            issues += 1

    # Filter out files we have no checker for.
    patterns = set()
    patterns.update(StyleChecker.all_patterns())
    patterns.update(Formatter.all_patterns())
    files = [f for f in commit.files() if len([p for p in patterns if fnmatch.fnmatch(os.path.basename(f), p)])]

    for f in files:
        issues += check_file(top_level, commit, f)

    if issues == 0:
        print("No issue detected")
    else:
        print('---')
        print("%u potential %s detected, please review" %
              (issues, 'issue' if issues == 1 else 'issues'))

    return issues


def extract_commits(revs):
    """Extract a list of commits on which to operate from a revision or revision
    range.
    """
    ret = subprocess.run(['git', 'rev-parse', revs], stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    if ret.returncode != 0:
        print(ret.stderr.decode('utf-8').splitlines()[0])
        return []

    revlist = ret.stdout.decode('utf-8').splitlines()

    # If the revlist contains more than one item, pass it to git rev-list to list
    # each commit individually.
    if len(revlist) > 1:
        ret = subprocess.run(['git', 'rev-list', *revlist], stdout=subprocess.PIPE)
        revlist = ret.stdout.decode('utf-8').splitlines()
        revlist.reverse()

    return [Commit(x) for x in revlist]


def git_top_level():
    """Get the absolute path of the git top-level directory."""
    ret = subprocess.run(['git', 'rev-parse', '--show-toplevel'],
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    if ret.returncode != 0:
        print(ret.stderr.decode('utf-8').splitlines()[0])
        return None

    return ret.stdout.decode('utf-8').strip()


def main(argv):

    # Parse command line arguments
    parser = argparse.ArgumentParser()
    parser.add_argument('--staged', '-s', action='store_true',
                        help='Include the changes in the index. Defaults to False')
    parser.add_argument('--amend', '-a', action='store_true',
                        help='Include changes in the index and the previous patch combined. Defaults to False')
    parser.add_argument('revision_range', type=str, default=None, nargs='?',
                        help='Revision range (as defined by git rev-parse). Defaults to HEAD if not specified.')
    args = parser.parse_args(argv[1:])

    # Check for required dependencies.
    for command, mandatory in dependencies.items():
        found = shutil.which(command)
        if mandatory and not found:
            print("Executable %s not found" % command)
            return 1

        dependencies[command] = found

    # Get the top level directory to pass absolute file names to git diff
    # commands, in order to support execution from subdirectories of the git
    # tree.
    top_level = git_top_level()
    if top_level is None:
            return 1

    commits = []
    if args.staged:
        commits.append(StagedChanges())
    if args.amend:
        commits.append(Amendment())

    # If none of --staged or --amend was passed
    if len(commits) == 0:
        # And no revisions were passed, then default to HEAD
        if not args.revision_range:
            args.revision_range = 'HEAD'

    if args.revision_range:
        commits += extract_commits(args.revision_range)

    issues = 0
    for commit in commits:
        issues += check_style(top_level, commit)
        print('')

    if issues:
        return 1
    else:
        return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv))
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-28 21:31:25 +0000