def run(self):
"""Use black to check code style."""
# if not self.black_check:
# return
msg = None
line = 0
col = 0
try:
if self.filename in self.STDIN_NAMES:
self.filename = "stdin"
source = stdin_utils.stdin_get_value()
else:
with open(self.filename, "rb") as buf:
source, _, _ = black.decode_bytes(buf.read())
except Exception as e:
source = ""
msg = "900 Failed to load file: %s" % e
if not source and not msg:
# Empty file (good)
return
elif not self.line_length:
msg = "998 Could not access flake8 line length setting."
elif source:
# Call black...
try:
if self._file_mode is None:
# Legacy version of black, 18.9b0 or older
new_code = black.format_file_contents(
source, line_length=self.line_length, fast=False)
else:
# For black 19.3b0 or later
new_code = black.format_file_contents(source,
mode=self._file_mode,
fast=False)
except black.NothingChanged:
return
except black.InvalidInput:
msg = "901 Invalid input."
except ValueError as e:
msg = "997 Configuration conflict: %s" % e
except Exception as e:
msg = "999 Unexpected exception: %s" % e
else:
assert (new_code != source
), "Black made changes without raising NothingChanged"
line, col = find_diff_start(source, new_code)
line += 1 # Strange as col seems to be zero based?
msg = "100 Black would make changes."
# If we don't know the line or column numbers, leaving as zero.
yield line, col, black_prefix + msg, type(self)
def read_lines_from_stdin(self):
# type: () -> List[str]
"""Read the lines from standard in."""
return utils.stdin_get_value().splitlines(True)
