def test_is_windows_checks_for_nt():
"""Verify that we correctly detect Windows."""
with mock.patch.object(os, 'name', 'nt'):
assert utils.is_windows() is True
with mock.patch.object(os, 'name', 'posix'):
assert utils.is_windows() is False
def test_is_windows_checks_for_nt():
"""Verify that we correctly detect Windows."""
with mock.patch.object(os, 'name', 'nt'):
assert utils.is_windows() is True
with mock.patch.object(os, 'name', 'posix'):
assert utils.is_windows() is False
def _job_count(self):
# type: () -> int
# First we walk through all of our error cases:
# - multiprocessing library is not present
# - we're running on windows in which case we know we have significant
# implemenation issues
# - the user provided stdin and that's not something we can handle
# well
# - we're processing a diff, which again does not work well with
# multiprocessing and which really shouldn't require multiprocessing
# - the user provided some awful input
if not multiprocessing:
LOG.warning("The multiprocessing module is not available. "
"Ignoring --jobs arguments.")
return 0
if (utils.is_windows()
and not utils.can_run_multiprocessing_on_windows()):
LOG.warning("The --jobs option is not available on Windows due to"
" a bug (https://bugs.python.org/issue27649) in "
"Python 2.7.11+ and 3.3+. We have detected that you "
"are running an unsupported version of Python on "
"Windows. Ignoring --jobs arguments.")
return 0
if utils.is_using_stdin(self.arguments):
LOG.warning("The --jobs option is not compatible with supplying "
"input using - . Ignoring --jobs arguments.")
return 0
if self.options.diff:
LOG.warning("The --diff option was specified with --jobs but "
"they are not compatible. Ignoring --jobs arguments.")
return 0
jobs = self.options.jobs
if jobs != "auto" and not jobs.isdigit():
LOG.warning(
'"%s" is not a valid parameter to --jobs. Must be one '
'of "auto" or a numerical value, e.g., 4.',
jobs,
)
return 0
# If the value is "auto", we want to let the multiprocessing library
# decide the number based on the number of CPUs. However, if that
# function is not implemented for this particular value of Python we
# default to 1
if jobs == "auto":
try:
return multiprocessing.cpu_count()
except NotImplementedError:
return 0
# Otherwise, we know jobs should be an integer and we can just convert
# it to an integer
return int(jobs)
def _multiprocessing_is_fork(): # type () -> bool
"""Class state is only preserved when using the `fork` strategy."""
if sys.version_info >= (3, 4):
return (multiprocessing
# https://github.com/python/typeshed/pull/3415
and
multiprocessing.get_start_method() == "fork" # type: ignore
)
else:
return multiprocessing and not utils.is_windows()
def _user_config_file(program_name: str) -> str:
if utils.is_windows():
home_dir = os.path.expanduser("~")
config_file_basename = f".{program_name}"
else:
home_dir = os.environ.get("XDG_CONFIG_HOME",
os.path.expanduser("~/.config"))
config_file_basename = program_name
return os.path.join(home_dir, config_file_basename)
def _job_count(self):
# type: () -> int
# First we walk through all of our error cases:
# - multiprocessing library is not present
# - we're running on windows in which case we know we have significant
# implemenation issues
# - the user provided stdin and that's not something we can handle
# well
# - we're processing a diff, which again does not work well with
# multiprocessing and which really shouldn't require multiprocessing
# - the user provided some awful input
if not multiprocessing:
LOG.warning('The multiprocessing module is not available. '
'Ignoring --jobs arguments.')
return 0
if (utils.is_windows() and
not utils.can_run_multiprocessing_on_windows()):
LOG.warning('The --jobs option is not available on Windows due to'
' a bug (https://bugs.python.org/issue27649) in '
'Python 2.7.11+ and 3.3+. We have detected that you '
'are running an unsupported version of Python on '
'Windows. Ignoring --jobs arguments.')
return 0
if utils.is_using_stdin(self.arguments):
LOG.warning('The --jobs option is not compatible with supplying '
'input using - . Ignoring --jobs arguments.')
return 0
if self.options.diff:
LOG.warning('The --diff option was specified with --jobs but '
'they are not compatible. Ignoring --jobs arguments.')
return 0
jobs = self.options.jobs
if jobs != 'auto' and not jobs.isdigit():
LOG.warning('"%s" is not a valid parameter to --jobs. Must be one '
'of "auto" or a numerical value, e.g., 4.', jobs)
return 0
# If the value is "auto", we want to let the multiprocessing library
# decide the number based on the number of CPUs. However, if that
# function is not implemented for this particular value of Python we
# default to 1
if jobs == 'auto':
try:
return multiprocessing.cpu_count()
except NotImplementedError:
return 0
# Otherwise, we know jobs should be an integer and we can just convert
# it to an integer
return int(jobs)
