tools/testing/kunit/kunit.py

   1 #!/usr/bin/env python3
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # A thin wrapper on top of the KUnit Kernel
   5 #
   6 # Copyright (C) 2019, Google LLC.
   7 # Author: Felix Guo <[email protected]>
   8 # Author: Brendan Higgins <[email protected]>
   9
  10 import argparse
  11 import os
  12 import re
  13 import shlex
  14 import sys
  15 import time
  16
  17 assert sys.version_info >= (3, 7), "Python version is too old"
  18
  19 from dataclasses import dataclass
  20 from enum import Enum, auto
  21 from typing import Iterable, List, Optional, Sequence, Tuple
  22
  23 import kunit_json
  24 import kunit_kernel
  25 import kunit_parser
  26 from kunit_printer import stdout, null_printer
  27
  28 class KunitStatus(Enum):
  29         SUCCESS = auto()
  30         CONFIG_FAILURE = auto()
  31         BUILD_FAILURE = auto()
  32         TEST_FAILURE = auto()
  33
  34 @dataclass
  35 class KunitResult:
  36         status: KunitStatus
  37         elapsed_time: float
  38
  39 @dataclass
  40 class KunitConfigRequest:
  41         build_dir: str
  42         make_options: Optional[List[str]]
  43
  44 @dataclass
  45 class KunitBuildRequest(KunitConfigRequest):
  46         jobs: int
  47
  48 @dataclass
  49 class KunitParseRequest:
  50         raw_output: Optional[str]
  51         json: Optional[str]
  52         summary: bool
  53         failed: bool
  54
  55 @dataclass
  56 class KunitExecRequest(KunitParseRequest):
  57         build_dir: str
  58         timeout: int
  59         filter_glob: str
  60         filter: str
  61         filter_action: Optional[str]
  62         kernel_args: Optional[List[str]]
  63         run_isolated: Optional[str]
  64         list_tests: bool
  65         list_tests_attr: bool
  66
  67 @dataclass
  68 class KunitRequest(KunitExecRequest, KunitBuildRequest):
  69         pass
  70
  71
  72 def get_kernel_root_path() -> str:
  73         path = sys.argv[0] if not __file__ else __file__
  74         parts = os.path.realpath(path).split('tools/testing/kunit')
  75         if len(parts) != 2:
  76                 sys.exit(1)
  77         return parts[0]
  78
  79 def config_tests(linux: kunit_kernel.LinuxSourceTree,
  80                  request: KunitConfigRequest) -> KunitResult:
  81         stdout.print_with_timestamp('Configuring KUnit Kernel ...')
  82
  83         config_start = time.time()
  84         success = linux.build_reconfig(request.build_dir, request.make_options)
  85         config_end = time.time()
  86         status = KunitStatus.SUCCESS if success else KunitStatus.CONFIG_FAILURE
  87         return KunitResult(status, config_end - config_start)
  88
  89 def build_tests(linux: kunit_kernel.LinuxSourceTree,
  90                 request: KunitBuildRequest) -> KunitResult:
  91         stdout.print_with_timestamp('Building KUnit Kernel ...')
  92
  93         build_start = time.time()
  94         success = linux.build_kernel(request.jobs,
  95                                      request.build_dir,
  96                                      request.make_options)
  97         build_end = time.time()
  98         status = KunitStatus.SUCCESS if success else KunitStatus.BUILD_FAILURE
  99         return KunitResult(status, build_end - build_start)
 100
 101 def config_and_build_tests(linux: kunit_kernel.LinuxSourceTree,
 102                            request: KunitBuildRequest) -> KunitResult:
 103         config_result = config_tests(linux, request)
 104         if config_result.status != KunitStatus.SUCCESS:
 105                 return config_result
 106
 107         return build_tests(linux, request)
 108
 109 def _list_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> List[str]:
 110         args = ['kunit.action=list']
 111
 112         if request.kernel_args:
 113                 args.extend(request.kernel_args)
 114
 115         output = linux.run_kernel(args=args,
 116                            timeout=request.timeout,
 117                            filter_glob=request.filter_glob,
 118                            filter=request.filter,
 119                            filter_action=request.filter_action,
 120                            build_dir=request.build_dir)
 121         lines = kunit_parser.extract_tap_lines(output)
 122         # Hack! Drop the dummy TAP version header that the executor prints out.
 123         lines.pop()
 124
 125         # Filter out any extraneous non-test output that might have gotten mixed in.
 126         return [l for l in output if re.match(r'^[^\s.]+\.[^\s.]+$', l)]
 127
 128 def _list_tests_attr(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> Iterable[str]:
 129         args = ['kunit.action=list_attr']
 130
 131         if request.kernel_args:
 132                 args.extend(request.kernel_args)
 133
 134         output = linux.run_kernel(args=args,
 135                            timeout=request.timeout,
 136                            filter_glob=request.filter_glob,
 137                            filter=request.filter,
 138                            filter_action=request.filter_action,
 139                            build_dir=request.build_dir)
 140         lines = kunit_parser.extract_tap_lines(output)
 141         # Hack! Drop the dummy TAP version header that the executor prints out.
 142         lines.pop()
 143
 144         # Filter out any extraneous non-test output that might have gotten mixed in.
 145         return lines
 146
 147 def _suites_from_test_list(tests: List[str]) -> List[str]:
 148         """Extracts all the suites from an ordered list of tests."""
 149         suites = []  # type: List[str]
 150         for t in tests:
 151                 parts = t.split('.', maxsplit=2)
 152                 if len(parts) != 2:
 153                         raise ValueError(f'internal KUnit error, test name should be of the form "<suite>.<test>", got "{t}"')
 154                 suite, _ = parts
 155                 if not suites or suites[-1] != suite:
 156                         suites.append(suite)
 157         return suites
 158
 159 def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> KunitResult:
 160         filter_globs = [request.filter_glob]
 161         if request.list_tests:
 162                 output = _list_tests(linux, request)
 163                 for line in output:
 164                         print(line.rstrip())
 165                 return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
 166         if request.list_tests_attr:
 167                 attr_output = _list_tests_attr(linux, request)
 168                 for line in attr_output:
 169                         print(line.rstrip())
 170                 return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
 171         if request.run_isolated:
 172                 tests = _list_tests(linux, request)
 173                 if request.run_isolated == 'test':
 174                         filter_globs = tests
 175                 elif request.run_isolated == 'suite':
 176                         filter_globs = _suites_from_test_list(tests)
 177                         # Apply the test-part of the user's glob, if present.
 178                         if '.' in request.filter_glob:
 179                                 test_glob = request.filter_glob.split('.', maxsplit=2)[1]
 180                                 filter_globs = [g + '.'+ test_glob for g in filter_globs]
 181
 182         metadata = kunit_json.Metadata(arch=linux.arch(), build_dir=request.build_dir, def_config='kunit_defconfig')
 183
 184         test_counts = kunit_parser.TestCounts()
 185         exec_time = 0.0
 186         for i, filter_glob in enumerate(filter_globs):
 187                 stdout.print_with_timestamp('Starting KUnit Kernel ({}/{})...'.format(i+1, len(filter_globs)))
 188
 189                 test_start = time.time()
 190                 run_result = linux.run_kernel(
 191                         args=request.kernel_args,
 192                         timeout=request.timeout,
 193                         filter_glob=filter_glob,
 194                         filter=request.filter,
 195                         filter_action=request.filter_action,
 196                         build_dir=request.build_dir)
 197
 198                 _, test_result = parse_tests(request, metadata, run_result)
 199                 # run_kernel() doesn't block on the kernel exiting.
 200                 # That only happens after we get the last line of output from `run_result`.
 201                 # So exec_time here actually contains parsing + execution time, which is fine.
 202                 test_end = time.time()
 203                 exec_time += test_end - test_start
 204
 205                 test_counts.add_subtest_counts(test_result.counts)
 206
 207         if len(filter_globs) == 1 and test_counts.crashed > 0:
 208                 bd = request.build_dir
 209                 print('The kernel seems to have crashed; you can decode the stack traces with:')
 210                 print('$ scripts/decode_stacktrace.sh {}/vmlinux {} < {} | tee {}/decoded.log | {} parse'.format(
 211                                 bd, bd, kunit_kernel.get_outfile_path(bd), bd, sys.argv[0]))
 212
 213         kunit_status = _map_to_overall_status(test_counts.get_status())
 214         return KunitResult(status=kunit_status, elapsed_time=exec_time)
 215
 216 def _map_to_overall_status(test_status: kunit_parser.TestStatus) -> KunitStatus:
 217         if test_status in (kunit_parser.TestStatus.SUCCESS, kunit_parser.TestStatus.SKIPPED):
 218                 return KunitStatus.SUCCESS
 219         return KunitStatus.TEST_FAILURE
 220
 221 def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input_data: Iterable[str]) -> Tuple[KunitResult, kunit_parser.Test]:
 222         parse_start = time.time()
 223
 224         if request.raw_output:
 225                 # Treat unparsed results as one passing test.
 226                 fake_test = kunit_parser.Test()
 227                 fake_test.status = kunit_parser.TestStatus.SUCCESS
 228                 fake_test.counts.passed = 1
 229
 230                 output: Iterable[str] = input_data
 231                 if request.raw_output == 'all':
 232                         pass
 233                 elif request.raw_output == 'kunit':
 234                         output = kunit_parser.extract_tap_lines(output)
 235                 for line in output:
 236                         print(line.rstrip())
 237                 parse_time = time.time() - parse_start
 238                 return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test
 239
 240         default_printer = stdout
 241         if request.summary or request.failed:
 242                 default_printer = null_printer
 243
 244         # Actually parse the test results.
 245         test = kunit_parser.parse_run_tests(input_data, default_printer)
 246         parse_time = time.time() - parse_start
 247
 248         if request.failed:
 249                 kunit_parser.print_test(test, request.failed, stdout)
 250         kunit_parser.print_summary_line(test, stdout)
 251
 252         if request.json:
 253                 json_str = kunit_json.get_json_result(
 254                                         test=test,
 255                                         metadata=metadata)
 256                 if request.json == 'stdout':
 257                         print(json_str)
 258                 else:
 259                         with open(request.json, 'w') as f:
 260                                 f.write(json_str)
 261                         stdout.print_with_timestamp("Test results stored in %s" %
 262                                 os.path.abspath(request.json))
 263
 264         if test.status != kunit_parser.TestStatus.SUCCESS:
 265                 return KunitResult(KunitStatus.TEST_FAILURE, parse_time), test
 266
 267         return KunitResult(KunitStatus.SUCCESS, parse_time), test
 268
 269 def run_tests(linux: kunit_kernel.LinuxSourceTree,
 270               request: KunitRequest) -> KunitResult:
 271         run_start = time.time()
 272
 273         config_result = config_tests(linux, request)
 274         if config_result.status != KunitStatus.SUCCESS:
 275                 return config_result
 276
 277         build_result = build_tests(linux, request)
 278         if build_result.status != KunitStatus.SUCCESS:
 279                 return build_result
 280
 281         exec_result = exec_tests(linux, request)
 282
 283         run_end = time.time()
 284
 285         stdout.print_with_timestamp((
 286                 'Elapsed time: %.3fs total, %.3fs configuring, %.3fs ' +
 287                 'building, %.3fs running\n') % (
 288                                 run_end - run_start,
 289                                 config_result.elapsed_time,
 290                                 build_result.elapsed_time,
 291                                 exec_result.elapsed_time))
 292         return exec_result
 293
 294 # Problem:
 295 # $ kunit.py run --json
 296 # works as one would expect and prints the parsed test results as JSON.
 297 # $ kunit.py run --json suite_name
 298 # would *not* pass suite_name as the filter_glob and print as json.
 299 # argparse will consider it to be another way of writing
 300 # $ kunit.py run --json=suite_name
 301 # i.e. it would run all tests, and dump the json to a `suite_name` file.
 302 # So we hackily automatically rewrite --json => --json=stdout
 303 pseudo_bool_flag_defaults = {
 304                 '--json': 'stdout',
 305                 '--raw_output': 'kunit',
 306 }
 307 def massage_argv(argv: Sequence[str]) -> Sequence[str]:
 308         def massage_arg(arg: str) -> str:
 309                 if arg not in pseudo_bool_flag_defaults:
 310                         return arg
 311                 return  f'{arg}={pseudo_bool_flag_defaults[arg]}'
 312         return list(map(massage_arg, argv))
 313
 314 def get_default_jobs() -> int:
 315         return len(os.sched_getaffinity(0))
 316
 317 def add_common_opts(parser: argparse.ArgumentParser) -> None:
 318         parser.add_argument('--build_dir',
 319                             help='As in the make command, it specifies the build '
 320                             'directory.',
 321                             type=str, default='.kunit', metavar='DIR')
 322         parser.add_argument('--make_options',
 323                             help='X=Y make option, can be repeated.',
 324                             action='append', metavar='X=Y')
 325         parser.add_argument('--alltests',
 326                             help='Run all KUnit tests via tools/testing/kunit/configs/all_tests.config',
 327                             action='store_true')
 328         parser.add_argument('--kunitconfig',
 329                              help='Path to Kconfig fragment that enables KUnit tests.'
 330                              ' If given a directory, (e.g. lib/kunit), "/.kunitconfig" '
 331                              'will get  automatically appended. If repeated, the files '
 332                              'blindly concatenated, which might not work in all cases.',
 333                              action='append', metavar='PATHS')
 334         parser.add_argument('--kconfig_add',
 335                              help='Additional Kconfig options to append to the '
 336                              '.kunitconfig, e.g. CONFIG_KASAN=y. Can be repeated.',
 337                             action='append', metavar='CONFIG_X=Y')
 338
 339         parser.add_argument('--arch',
 340                             help=('Specifies the architecture to run tests under. '
 341                                   'The architecture specified here must match the '
 342                                   'string passed to the ARCH make param, '
 343                                   'e.g. i386, x86_64, arm, um, etc. Non-UML '
 344                                   'architectures run on QEMU.'),
 345                             type=str, default='um', metavar='ARCH')
 346
 347         parser.add_argument('--cross_compile',
 348                             help=('Sets make\'s CROSS_COMPILE variable; it should '
 349                                   'be set to a toolchain path prefix (the prefix '
 350                                   'of gcc and other tools in your toolchain, for '
 351                                   'example `sparc64-linux-gnu-` if you have the '
 352                                   'sparc toolchain installed on your system, or '
 353                                   '`$HOME/toolchains/microblaze/gcc-9.2.0-nolibc/microblaze-linux/bin/microblaze-linux-` '
 354                                   'if you have downloaded the microblaze toolchain '
 355                                   'from the 0-day website to a directory in your '
 356                                   'home directory called `toolchains`).'),
 357                             metavar='PREFIX')
 358
 359         parser.add_argument('--qemu_config',
 360                             help=('Takes a path to a path to a file containing '
 361                                   'a QemuArchParams object.'),
 362                             type=str, metavar='FILE')
 363
 364         parser.add_argument('--qemu_args',
 365                             help='Additional QEMU arguments, e.g. "-smp 8"',
 366                             action='append', metavar='')
 367
 368 def add_build_opts(parser: argparse.ArgumentParser) -> None:
 369         parser.add_argument('--jobs',
 370                             help='As in the make command, "Specifies  the number of '
 371                             'jobs (commands) to run simultaneously."',
 372                             type=int, default=get_default_jobs(), metavar='N')
 373
 374 def add_exec_opts(parser: argparse.ArgumentParser) -> None:
 375         parser.add_argument('--timeout',
 376                             help='maximum number of seconds to allow for all tests '
 377                             'to run. This does not include time taken to build the '
 378                             'tests.',
 379                             type=int,
 380                             default=300,
 381                             metavar='SECONDS')
 382         parser.add_argument('filter_glob',
 383                             help='Filter which KUnit test suites/tests run at '
 384                             'boot-time, e.g. list* or list*.*del_test',
 385                             type=str,
 386                             nargs='?',
 387                             default='',
 388                             metavar='filter_glob')
 389         parser.add_argument('--filter',
 390                             help='Filter KUnit tests with attributes, '
 391                             'e.g. module=example or speed>slow',
 392                             type=str,
 393                                 default='')
 394         parser.add_argument('--filter_action',
 395                             help='If set to skip, filtered tests will be skipped, '
 396                                 'e.g. --filter_action=skip. Otherwise they will not run.',
 397                             type=str,
 398                                 choices=['skip'])
 399         parser.add_argument('--kernel_args',
 400                             help='Kernel command-line parameters. Maybe be repeated',
 401                              action='append', metavar='')
 402         parser.add_argument('--run_isolated', help='If set, boot the kernel for each '
 403                             'individual suite/test. This is can be useful for debugging '
 404                             'a non-hermetic test, one that might pass/fail based on '
 405                             'what ran before it.',
 406                             type=str,
 407                             choices=['suite', 'test'])
 408         parser.add_argument('--list_tests', help='If set, list all tests that will be '
 409                             'run.',
 410                             action='store_true')
 411         parser.add_argument('--list_tests_attr', help='If set, list all tests and test '
 412                             'attributes.',
 413                             action='store_true')
 414
 415 def add_parse_opts(parser: argparse.ArgumentParser) -> None:
 416         parser.add_argument('--raw_output', help='If set don\'t parse output from kernel. '
 417                             'By default, filters to just KUnit output. Use '
 418                             '--raw_output=all to show everything',
 419                              type=str, nargs='?', const='all', default=None, choices=['all', 'kunit'])
 420         parser.add_argument('--json',
 421                             nargs='?',
 422                             help='Prints parsed test results as JSON to stdout or a file if '
 423                             'a filename is specified. Does nothing if --raw_output is set.',
 424                             type=str, const='stdout', default=None, metavar='FILE')
 425         parser.add_argument('--summary',
 426                             help='Prints only the summary line for parsed test results.'
 427                                 'Does nothing if --raw_output is set.',
 428                             action='store_true')
 429         parser.add_argument('--failed',
 430                             help='Prints only the failed parsed test results and summary line.'
 431                                 'Does nothing if --raw_output is set.',
 432                             action='store_true')
 433
 434
 435 def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree:
 436         """Returns a LinuxSourceTree based on the user's arguments."""
 437         # Allow users to specify multiple arguments in one string, e.g. '-smp 8'
 438         qemu_args: List[str] = []
 439         if cli_args.qemu_args:
 440                 for arg in cli_args.qemu_args:
 441                         qemu_args.extend(shlex.split(arg))
 442
 443         kunitconfigs = cli_args.kunitconfig if cli_args.kunitconfig else []
 444         if cli_args.alltests:
 445                 # Prepend so user-specified options take prio if we ever allow
 446                 # --kunitconfig options to have differing options.
 447                 kunitconfigs = [kunit_kernel.ALL_TESTS_CONFIG_PATH] + kunitconfigs
 448
 449         return kunit_kernel.LinuxSourceTree(cli_args.build_dir,
 450                         kunitconfig_paths=kunitconfigs,
 451                         kconfig_add=cli_args.kconfig_add,
 452                         arch=cli_args.arch,
 453                         cross_compile=cli_args.cross_compile,
 454                         qemu_config_path=cli_args.qemu_config,
 455                         extra_qemu_args=qemu_args)
 456
 457
 458 def run_handler(cli_args: argparse.Namespace) -> None:
 459         if not os.path.exists(cli_args.build_dir):
 460                 os.mkdir(cli_args.build_dir)
 461
 462         linux = tree_from_args(cli_args)
 463         request = KunitRequest(build_dir=cli_args.build_dir,
 464                                         make_options=cli_args.make_options,
 465                                         jobs=cli_args.jobs,
 466                                         raw_output=cli_args.raw_output,
 467                                         json=cli_args.json,
 468                                         summary=cli_args.summary,
 469                                         failed=cli_args.failed,
 470                                         timeout=cli_args.timeout,
 471                                         filter_glob=cli_args.filter_glob,
 472                                         filter=cli_args.filter,
 473                                         filter_action=cli_args.filter_action,
 474                                         kernel_args=cli_args.kernel_args,
 475                                         run_isolated=cli_args.run_isolated,
 476                                         list_tests=cli_args.list_tests,
 477                                         list_tests_attr=cli_args.list_tests_attr)
 478         result = run_tests(linux, request)
 479         if result.status != KunitStatus.SUCCESS:
 480                 sys.exit(1)
 481
 482
 483 def config_handler(cli_args: argparse.Namespace) -> None:
 484         if cli_args.build_dir and (
 485                         not os.path.exists(cli_args.build_dir)):
 486                 os.mkdir(cli_args.build_dir)
 487
 488         linux = tree_from_args(cli_args)
 489         request = KunitConfigRequest(build_dir=cli_args.build_dir,
 490                                                 make_options=cli_args.make_options)
 491         result = config_tests(linux, request)
 492         stdout.print_with_timestamp((
 493                 'Elapsed time: %.3fs\n') % (
 494                         result.elapsed_time))
 495         if result.status != KunitStatus.SUCCESS:
 496                 sys.exit(1)
 497
 498
 499 def build_handler(cli_args: argparse.Namespace) -> None:
 500         linux = tree_from_args(cli_args)
 501         request = KunitBuildRequest(build_dir=cli_args.build_dir,
 502                                         make_options=cli_args.make_options,
 503                                         jobs=cli_args.jobs)
 504         result = config_and_build_tests(linux, request)
 505         stdout.print_with_timestamp((
 506                 'Elapsed time: %.3fs\n') % (
 507                         result.elapsed_time))
 508         if result.status != KunitStatus.SUCCESS:
 509                 sys.exit(1)
 510
 511
 512 def exec_handler(cli_args: argparse.Namespace) -> None:
 513         linux = tree_from_args(cli_args)
 514         exec_request = KunitExecRequest(raw_output=cli_args.raw_output,
 515                                         build_dir=cli_args.build_dir,
 516                                         json=cli_args.json,
 517                                         summary=cli_args.summary,
 518                                         failed=cli_args.failed,
 519                                         timeout=cli_args.timeout,
 520                                         filter_glob=cli_args.filter_glob,
 521                                         filter=cli_args.filter,
 522                                         filter_action=cli_args.filter_action,
 523                                         kernel_args=cli_args.kernel_args,
 524                                         run_isolated=cli_args.run_isolated,
 525                                         list_tests=cli_args.list_tests,
 526                                         list_tests_attr=cli_args.list_tests_attr)
 527         result = exec_tests(linux, exec_request)
 528         stdout.print_with_timestamp((
 529                 'Elapsed time: %.3fs\n') % (result.elapsed_time))
 530         if result.status != KunitStatus.SUCCESS:
 531                 sys.exit(1)
 532
 533
 534 def parse_handler(cli_args: argparse.Namespace) -> None:
 535         if cli_args.file is None:
 536                 sys.stdin.reconfigure(errors='backslashreplace')  # type: ignore
 537                 kunit_output = sys.stdin  # type: Iterable[str]
 538         else:
 539                 with open(cli_args.file, 'r', errors='backslashreplace') as f:
 540                         kunit_output = f.read().splitlines()
 541         # We know nothing about how the result was created!
 542         metadata = kunit_json.Metadata()
 543         request = KunitParseRequest(raw_output=cli_args.raw_output,
 544                                         json=cli_args.json, summary=cli_args.summary,
 545                                         failed=cli_args.failed)
 546         result, _ = parse_tests(request, metadata, kunit_output)
 547         if result.status != KunitStatus.SUCCESS:
 548                 sys.exit(1)
 549
 550
 551 subcommand_handlers_map = {
 552         'run': run_handler,
 553         'config': config_handler,
 554         'build': build_handler,
 555         'exec': exec_handler,
 556         'parse': parse_handler
 557 }
 558
 559
 560 def main(argv: Sequence[str]) -> None:
 561         parser = argparse.ArgumentParser(
 562                         description='Helps writing and running KUnit tests.')
 563         subparser = parser.add_subparsers(dest='subcommand')
 564
 565         # The 'run' command will config, build, exec, and parse in one go.
 566         run_parser = subparser.add_parser('run', help='Runs KUnit tests.')
 567         add_common_opts(run_parser)
 568         add_build_opts(run_parser)
 569         add_exec_opts(run_parser)
 570         add_parse_opts(run_parser)
 571
 572         config_parser = subparser.add_parser('config',
 573                                                 help='Ensures that .config contains all of '
 574                                                 'the options in .kunitconfig')
 575         add_common_opts(config_parser)
 576
 577         build_parser = subparser.add_parser('build', help='Builds a kernel with KUnit tests')
 578         add_common_opts(build_parser)
 579         add_build_opts(build_parser)
 580
 581         exec_parser = subparser.add_parser('exec', help='Run a kernel with KUnit tests')
 582         add_common_opts(exec_parser)
 583         add_exec_opts(exec_parser)
 584         add_parse_opts(exec_parser)
 585
 586         # The 'parse' option is special, as it doesn't need the kernel source
 587         # (therefore there is no need for a build_dir, hence no add_common_opts)
 588         # and the '--file' argument is not relevant to 'run', so isn't in
 589         # add_parse_opts()
 590         parse_parser = subparser.add_parser('parse',
 591                                             help='Parses KUnit results from a file, '
 592                                             'and parses formatted results.')
 593         add_parse_opts(parse_parser)
 594         parse_parser.add_argument('file',
 595                                   help='Specifies the file to read results from.',
 596                                   type=str, nargs='?', metavar='input_file')
 597
 598         cli_args = parser.parse_args(massage_argv(argv))
 599
 600         if get_kernel_root_path():
 601                 os.chdir(get_kernel_root_path())
 602
 603         subcomand_handler = subcommand_handlers_map.get(cli_args.subcommand, None)
 604
 605         if subcomand_handler is None:
 606                 parser.print_help()
 607                 return
 608
 609         subcomand_handler(cli_args)
 610
 611
 612 if __name__ == '__main__':
 613         main(sys.argv[1:])