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import argparse
import os
import shlex
import sys
import lit.util
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument('test_paths',
nargs='+',
metavar="TEST_PATH",
help='File or path to include in the test suite')
parser.add_argument("--version",
dest="show_version",
help="Show version and exit",
action="store_true")
parser.add_argument("-j", "--threads", "--workers",
dest="workers",
metavar="N",
help="Number of workers used for testing",
type=_positive_int,
default=lit.util.detectCPUs())
parser.add_argument("--config-prefix",
dest="configPrefix",
metavar="NAME",
help="Prefix for 'lit' config files")
parser.add_argument("-D", "--param",
dest="user_params",
metavar="NAME=VAL",
help="Add 'NAME' = 'VAL' to the user defined parameters",
action="append",
default=[])
format_group = parser.add_argument_group("Output Format")
# FIXME: I find these names very confusing, although I like the
# functionality.
format_group.add_argument("-q", "--quiet",
help="Suppress no error output",
action="store_true")
format_group.add_argument("-s", "--succinct",
help="Reduce amount of output",
action="store_true")
format_group.add_argument("-v", "--verbose",
dest="showOutput",
help="Show test output for failures",
action="store_true")
format_group.add_argument("-vv", "--echo-all-commands",
dest="echoAllCommands",
action="store_true",
help="Echo all commands as they are executed to stdout. In case of "
"failure, last command shown will be the failing one.")
format_group.add_argument("-a", "--show-all",
dest="showAllOutput",
help="Display all commandlines and output",
action="store_true")
format_group.add_argument("-o", "--output",
dest="output_path",
help="Write test results to the provided path",
metavar="PATH")
format_group.add_argument("--no-progress-bar",
dest="useProgressBar",
help="Do not use curses based progress bar",
action="store_false")
format_group.add_argument("--show-unsupported",
help="Show unsupported tests",
action="store_true")
format_group.add_argument("--show-xfail",
help="Show tests that were expected to fail",
action="store_true")
execution_group = parser.add_argument_group("Test Execution")
execution_group.add_argument("--path",
help="Additional paths to add to testing environment",
action="append",
default=[])
execution_group.add_argument("--vg",
dest="useValgrind",
help="Run tests under valgrind",
action="store_true")
execution_group.add_argument("--vg-leak",
dest="valgrindLeakCheck",
help="Check for memory leaks under valgrind",
action="store_true")
execution_group.add_argument("--vg-arg",
dest="valgrindArgs",
metavar="ARG",
help="Specify an extra argument for valgrind",
action="append",
default=[])
execution_group.add_argument("--time-tests",
dest="timeTests",
help="Track elapsed wall time for each test",
action="store_true")
execution_group.add_argument("--no-execute",
dest="noExecute",
help="Don't execute any tests (assume PASS)",
action="store_true")
execution_group.add_argument("--xunit-xml-output",
dest="xunit_output_file",
help="Write XUnit-compatible XML test reports to the specified file")
execution_group.add_argument("--timeout",
dest="maxIndividualTestTime",
help="Maximum time to spend running a single test (in seconds). "
"0 means no time limit. [Default: 0]",
type=_non_negative_int) # TODO(yln): --[no-]test-timeout, instead of 0 allowed
execution_group.add_argument("--max-failures",
help="Stop execution after the given number of failures.",
type=_positive_int)
execution_group.add_argument("--allow-empty-runs",
help="Do not fail the run if all tests are filtered out",
action="store_true")
selection_group = parser.add_argument_group("Test Selection")
selection_group.add_argument("--max-tests",
metavar="N",
help="Maximum number of tests to run",
type=_positive_int)
selection_group.add_argument("--max-time", #TODO(yln): --timeout
dest="timeout",
metavar="N",
help="Maximum time to spend testing (in seconds)",
type=_positive_int)
selection_group.add_argument("--shuffle", # TODO(yln): --order=random
help="Run tests in random order", # default or 'by-path' (+ isEarlyTest())
action="store_true")
selection_group.add_argument("-i", "--incremental", # TODO(yln): --order=failing-first
help="Run modified and failing tests first (updates mtimes)",
action="store_true")
selection_group.add_argument("--filter",
metavar="REGEX",
type=_case_insensitive_regex,
help="Only run tests with paths matching the given regular expression",
default=os.environ.get("LIT_FILTER"))
selection_group.add_argument("--num-shards", # TODO(yln): --shards N/M
dest="numShards",
metavar="M",
help="Split testsuite into M pieces and only run one",
type=_positive_int,
default=os.environ.get("LIT_NUM_SHARDS"))
selection_group.add_argument("--run-shard",
dest="runShard",
metavar="N",
help="Run shard #N of the testsuite",
type=_positive_int,
default=os.environ.get("LIT_RUN_SHARD"))
debug_group = parser.add_argument_group("Debug and Experimental Options")
debug_group.add_argument("--debug",
help="Enable debugging (for 'lit' development)",
action="store_true")
debug_group.add_argument("--show-suites",
dest="showSuites",
help="Show discovered test suites",
action="store_true")
debug_group.add_argument("--show-tests",
dest="showTests",
help="Show all discovered tests",
action="store_true")
# LIT is special: environment variables override command line arguments.
env_args = shlex.split(os.environ.get("LIT_OPTS", ""))
args = sys.argv[1:] + env_args
opts = parser.parse_args(args)
# Validate command line options
if opts.echoAllCommands:
opts.showOutput = True
# TODO(python3): Could be enum
if opts.shuffle:
opts.order = 'random'
elif opts.incremental:
opts.order = 'failing-first'
else:
opts.order = 'default'
if opts.numShards or opts.runShard:
if not opts.numShards or not opts.runShard:
parser.error("--num-shards and --run-shard must be used together")
if opts.runShard > opts.numShards:
parser.error("--run-shard must be between 1 and --num-shards (inclusive)")
opts.shard = (opts.runShard, opts.numShards)
else:
opts.shard = None
return opts
def _positive_int(arg):
return _int(arg, 'positive', lambda i: i > 0)
def _non_negative_int(arg):
return _int(arg, 'non-negative', lambda i: i >= 0)
def _int(arg, kind, pred):
desc = "requires {} integer, but found '{}'"
try:
i = int(arg)
except ValueError:
raise _error(desc, kind, arg)
if not pred(i):
raise _error(desc, kind, arg)
return i
def _case_insensitive_regex(arg):
import re
try:
return re.compile(arg, re.IGNORECASE)
except re.error as reason:
raise _error("invalid regular expression: '{}', {}", arg, reason)
def _error(desc, *args):
msg = desc.format(*args)
return argparse.ArgumentTypeError(msg)
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