/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * control_value.cpp - ControlValue tests */ #include #include #include #include "test.h" using namespace std; using namespace libcamera; class ControlValueTest : public Test { protected: int run() { /* * None type. */ ControlValue value; if (!value.isNone() || value.isArray()) { cerr << "Empty value is non-null" << endl; return TestFail; } /* * Bool type. */ value.set(true); if (value.isNone() || value.isArray() || value.type() != ControlTypeBool) { cerr << "Control type mismatch after setting to bool" << endl; return TestFail; } if (value.get() != true) { cerr << "Control value mismatch after setting to bool" << endl; return TestFail; } if (value.toString() != "true") { cerr << "Control string mismatch after setting to bool" << endl; return TestFail; } std::array bools{ true, false }; value.set(Span(bools)); if (value.isNone() || !value.isArray() || value.type() != ControlTypeBool) { cerr << "Control type mismatch after setting to bool array" << endl; return TestFail; } Span boolsResult = value.get>(); if (bools.size() != boolsResult.size() || !std::equal(bools.begin(), bools.end(), boolsResult.begin())) { cerr << "Control value mismatch after setting to bool" << endl; return TestFail; } if (value.toString() != "[ true, false ]") { cerr << "Control string mismatch after setting to bool array" << endl; return TestFail; } /* * Integer8 type. */ value.set(static_cast(42)); if (value.isNone() || value.isArray() || value.type() != ControlTypeByte) { cerr << "Control type mismatch after setting to uint8_t" << endl; return TestFail; } if (value.get() != 42) { cerr << "Control value mismatch after setting to uint8_t" << endl; return TestFail; } if (value.toString() != "42") { cerr << "Control string mismatch after setting to uint8_t" << endl; return TestFail; } std::array bytes{ 3, 14, 15, 9 }; value.set(Span(bytes)); if (value.isNone() || !value.isArray() || value.type() != ControlTypeByte) { cerr << "Control type mismatch after setting to uint8_t array" << endl; return TestFail; } Span int8sResult = value.get>(); if (bytes.size() != int8sResult.size() || !std::equal(bytes.begin(), bytes.end(), int8sResult.begin())) { cerr << "Control value mismatch after setting to uint8_t array" << endl; return TestFail; } if (value.toString() != "[ 3, 14, 15, 9 ]") { cerr << "Control string mismatch after setting to uint8_t array" << endl; return TestFail; } /* * Integer32 type. */ value.set(0x42000000); if (value.isNone() || value.isArray() || value.type() != ControlTypeInteger32) { cerr << "Control type mismatch after setting to int32_t" << endl; return TestFail; } if (value.get() != 0x42000000) { cerr << "Control value mismatch after setting to int32_t" << endl; return TestFail; } if (value.toString() != "1107296256") { cerr << "Control string mismatch after setting to int32_t" << endl; return TestFail; } std::array int32s{ 3, 14, 15, 9 }; value.set(Span(int32s)); if (value.isNone() || !value.isArray() || value.type() != ControlTypeInteger32) { cerr << "Control type mismatch after setting to int32_t array" << endl; return TestFail; } Span int32sResult = value.get>(); if (int32s.size() != int32sResult.size() || !std::equal(int32s.begin(), int32s.end(), int32sResult.begin())) { cerr << "Control value mismatch after setting to int32_t array" << endl; return TestFail; } if (value.toString() != "[ 3, 14, 15, 9 ]") { cerr << "Control string mismatch after setting to int32_t array" << endl; return TestFail; } /* * Integer64 type. */ value.set(static_cast(-42)); if (value.isNone() || value.isArray() || value.type() != ControlTypeInteger64) { cerr << "Control type mismatch after setting to int64_t" << endl; return TestFail; } if (value.get() != -42) { cerr << "Control value mismatch after setting to int64_t" << endl; return TestFail; } if (value.toString() != "-42") { cerr << "Control string mismatch after setting to int64_t" << endl; return TestFail; } std::array int64s{ 3, 14, 15, 9 }; value.set(Span(int64s)); if (value.isNone() || !value.isArray() || value.type() != ControlTypeInteger64) { cerr << "Control type mismatch after setting to int64_t array" << endl; return TestFail; } Span int64sResult = value.get>(); if (int64s.size() != int64sResult.size() || !std::equal(int64s.begin(), int64s.end(), int64sResult.begin())) { cerr << "Control value mismatch after setting to int64_t array" << endl; return TestFail; } if (value.toString() != "[ 3, 14, 15, 9 ]") { cerr << "Control string mismatch after setting to int64_t array" << endl; return TestFail; } /* * Float type. */ value.set(-0.42f); if (value.isNone() || value.isArray() || value.type() != ControlTypeFloat) { cerr << "Control type mismatch after setting to float" << endl; return TestFail; } if (value.get() != -0.42f) { cerr << "Control value mismatch after setting to float" << endl; return TestFail; } if (value.toString() != "-0.420000") { cerr << "Control string mismatch after setting to float" << endl; return TestFail; } std::array floats{ 3.141593, 2.718282, 299792458.0 }; value.set(Span(floats)); if (value.isNone() || !value.isArray() || value.type() != ControlTypeFloat) { cerr << "Control type mismatch after setting to float array" << endl; return TestFail; } Span floatsResult = value.get>(); if (floats.size() != floatsResult.size() || !std::equal(floats.begin(), floats.end(), floatsResult.begin())) { cerr << "Control value mismatch after setting to float array" << endl; return TestFail; } /* * The string representation for the third value doesn't match * the value in the floats array above, due to limited precision * of the float type that can't properly represent the speed of * light. */ if (value.toString() != "[ 3.141593, 2.718282, 299792448.000000 ]") { cerr << "Control string mismatch after setting to float array" << endl; return TestFail; } /* * String type. */ std::string string{ "libcamera" }; value.set(string); if (value.isNone() || !value.isArray() || value.type() != ControlTypeString || value.numElements() != string.size()) { cerr << "Control type mismatch after setting to string" << endl; return TestFail; } if (value.get() != string) { cerr << "Control value mismatch after setting to string" << endl; return TestFail; } if (value.toString() != string) { cerr << "Control string mismatch after setting to string" << endl; return TestFail; } return TestPass; } }; TEST_REGISTER(ControlValueTest) 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2018, Google Inc.
#
# Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
#
# 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:
            # Work around https://github.com/python/cpython/issues/46395
            # See https://www.gnu.org/software/diffutils/manual/html_node/Incomplete-Lines.html
            if line[-1] != '\n':
                hunk.append(line + '\n')
                line = '\\ No newline at end of file\n'

            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]

    def __repr__(self):
        return f'{self.__status} {self.__filename}'

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

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


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

    def _parse_trailers(self, lines):
        for index in range(1, len(lines)):
            line = lines[index]
            if not line:
                break

            self._trailers.append(line)

        return index

    def _parse(self):
        # Get the commit title and list of files.
        ret = subprocess.run(['git', 'show', '--format=%s%n%(trailers:only,unfold)', '--name-status',
                              self.commit],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        lines = ret.splitlines()

        self._title = lines[0]

        index = self._parse_trailers(lines)
        self._files = [CommitFile(f) for f in lines[index:] if f]

    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

    @property
    def trailers(self):
        return self._trailers

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

    def _parse(self):
        # Create a title using HEAD commit and parse the trailers.
        ret = subprocess.run(['git', 'show', '--format=%H %s%n%(trailers:only,unfold)',
                             '--no-patch'],
                             stdout=subprocess.PIPE).stdout.decode('utf-8')
        lines = ret.splitlines()

        self._title = 'Amendment of ' + lines[0].strip()

        self._parse_trailers(lines)

        # 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)
            bases[0].subclasses.sort(key=lambda x: getattr(x, 'priority', 0),
                                     reverse=True)
        return newclass


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

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

    def __init__(self):
        pass

    #
    # Class methods
    #
    @classmethod
    def checkers(cls, names):
        for checker in cls.subclasses:
            if names and checker.__name__ not in names:
                continue
            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()
                       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


class TitleChecker(CommitChecker):
    prefix_regex = re.compile(r'^([a-zA-Z0-9_.-]+: )+')
    release_regex = re.compile(r'libcamera v[0-9]+\.[0-9]+\.[0-9]+')

    @classmethod
    def check(cls, commit, top_level):
        title = commit.title

        # Skip the check when validating staged changes (as done through a
        # pre-commit hook) as there is no title to check in that case.
        if isinstance(commit, StagedChanges):
            return []

        # Ignore release commits, they don't need a prefix.
        if TitleChecker.release_regex.fullmatch(title):
            return []

        prefix_pos = title.find(': ')
        if prefix_pos != -1 and prefix_pos != len(title) - 2:
            return []

        # Find prefix candidates by searching the git history
        msgs = subprocess.run(['git', 'log', '--no-decorate', '--oneline', '-n100', '--'] + commit.files(),
                              stdout=subprocess.PIPE).stdout.decode('utf-8')
        prefixes = {}
        prefixes_count = 0
        for msg in msgs.splitlines():
            prefix = TitleChecker.prefix_regex.match(msg)
            if not prefix:
                continue

            prefix = prefix.group(0)
            if prefix in prefixes:
                prefixes[prefix] += 1
            else:
                prefixes[prefix] = 1

            prefixes_count += 1

        if not prefixes:
            return [CommitIssue('Commit title is missing prefix')]

        # Sort the candidates by number of occurrences and pick the best ones.
        # When multiple prefixes are possible without a clear winner, we want to
        # display the most common options to the user, but without the most
        # unlikely options to avoid too long messages. As a heuristic, select
        # enough candidates to cover at least 2/3 of the possible prefixes, but
        # never more than 4 candidates.
        prefixes = list(prefixes.items())
        prefixes.sort(key=lambda x: x[1], reverse=True)

        candidates = []
        candidates_count = 0
        for prefix in prefixes:
            candidates.append(f"`{prefix[0]}'")
            candidates_count += prefix[1]
            if candidates_count >= prefixes_count * 2 / 3 or \
               len(candidates) == 4:
                break

        candidates = candidates[:-2] + [' or '.join(candidates[-2:])]
        candidates = ', '.join(candidates)

        return [CommitIssue('Commit title is missing prefix, '
                            'possible candidates are ' + candidates)]


class TrailersChecker(CommitChecker):
    commit_regex = re.compile(r'[0-9a-f]{12}[0-9a-f]* \(".*"\)')

    coverity_regex = re.compile(r'Coverity CID=.*')

    # Simple e-mail address validator regex, with an additional trailing
    # comment. The complexity of a full RFC6531 validator isn't worth the
    # additional invalid addresses it would reject.
    email_regex = re.compile(r'[^<]+ <[^@>]+@[^>]+>( # .*)?')

    link_regex = re.compile(r'https?://.*')

    @staticmethod
    def validate_reported_by(value):
        if TrailersChecker.email_regex.fullmatch(value):
            return True
        if TrailersChecker.coverity_regex.fullmatch(value):
            return True
        return False

    known_trailers = {
        'Acked-by': email_regex,
        'Bug': link_regex,
        'Co-developed-by': email_regex,
        'Fixes': commit_regex,
        'Link': link_regex,
        'Reported-by': validate_reported_by,
        'Reviewed-by': email_regex,
        'Signed-off-by': email_regex,
        'Suggested-by': email_regex,
        'Tested-by': email_regex,
    }

    trailer_regex = re.compile(r'([A-Z][a-zA-Z-]*)\s*:\s*(.*)')

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

        for trailer in commit.trailers:
            match = TrailersChecker.trailer_regex.fullmatch(trailer)
            if not match:
                issues.append(CommitIssue(f"Malformed commit trailer '{trailer}'"))
                continue

            key, value = match.groups()

            validator = TrailersChecker.known_trailers.get(key)
            if not validator:
                issues.append(CommitIssue(f"Invalid commit trailer key '{key}'"))
                continue

            if isinstance(validator, re.Pattern):
                valid = bool(validator.fullmatch(value))
            else:
                valid = validator(value)

            if not valid:
                issues.append(CommitIssue(f"Malformed value '{value}' for commit trailer '{key}'"))
                continue

        return issues


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

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

    def __init__(self):
        pass

    #
    # Class methods
    #
    @classmethod
    def checkers(cls, filename, names):
        for checker in cls.subclasses:
            if names and checker.__name__ not in names:
                continue
            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(r'^#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(r'\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(r'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(r'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, names):
        for formatter in cls.subclasses:
            if names and formatter.__name__ not in names:
                continue
            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')
    priority = -1

    @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')

    oneliner_regex = re.compile(r'^ +\* +\\(brief|param|return)\b.*\.$')
    return_regex = re.compile(r' +\* +\\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.oneliner_regex.sub(lambda m: m.group(0)[:-1], line)
            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(r'^#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.
                open_token = match.group(1)
                file_name = match.group(2)
                close_token = match.group(3)

                # Ensure the "..." include style for internal headers and the
                # <...> style for all other libcamera headers.
                if (file_name.startswith('libcamera/internal')):
                    open_token = '"'
                    close_token = '"'
                elif (file_name.startswith('libcamera/')):
                    open_token = '<'
                    close_token = '>'

                line = f'#include {open_token}{file_name}{close_token}'
                includes.append((line, file_name))
                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, checkers):
    # 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, checkers):
        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, checkers):
        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%s' % (Colours.fg(Colours.Yellow), issue.line_number,
                                   issue.msg, Colours.reset()))
            if issue.line is not None:
                print('%s+%s%s' % (Colours.fg(Colours.Yellow), issue.line.rstrip(),
                                   Colours.reset()))

    return len(formatted_diff) + len(issues)


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

    issues = 0

    # Apply the commit checkers first.
    for checker in CommitChecker.checkers(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, checkers)

    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('--checkers', '-c', type=str,
                        help='Specify which checkers to run as a comma-separated list. Defaults to all checkers')
    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:])

    if args.checkers:
        args.checkers = args.checkers.split(',')

    # 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: