import builtins
import itertools
import os
import sys
import traceback
from functools import wraps, partial
from typing import Optional, IO, Callable
import click
from click.exceptions import ClickException
CONTEXT_SETTINGS = dict(
help_option_names=['-h', '--help']
)
[docs]class ClickWarningException(ClickException):
"""
Custom exception class for displaying warnings in yellow color.
:param message: The error message.
:type message: str
"""
[docs] def show(self, file: Optional[IO] = None) -> None:
"""
Display the warning message in yellow.
:param file: File to write the output to.
:type file: Optional[IO]
"""
click.secho(self.format_message(), fg='yellow', file=sys.stderr)
[docs]class ClickErrorException(ClickException):
"""
Custom exception class for displaying errors in red color.
:param message: The error message.
:type message: str
"""
[docs] def show(self, file: Optional[IO] = None) -> None:
"""
Display the error message in red.
:param file: File to write the output to.
:type file: Optional[IO]
"""
click.secho(self.format_message(), fg='red', file=sys.stderr)
[docs]def print_exception(err: BaseException, print: Optional[Callable] = None):
"""
Print exception information, including traceback.
:param err: The exception object.
:type err: BaseException
:param print: Custom print function. If not provided, uses built-in print.
:type print: Optional[Callable]
"""
print = print or builtins.print
lines = list(itertools.chain(*map(
lambda x: x.splitlines(keepends=False),
traceback.format_tb(err.__traceback__)
)))
if lines:
print('Traceback (most recent call last):')
print(os.linesep.join(lines))
if len(err.args) == 0:
print(f'{type(err).__name__}')
elif len(err.args) == 1:
print(f'{type(err).__name__}: {err.args[0]}')
else:
print(f'{type(err).__name__}: {err.args}')
[docs]class KeyboardInterrupted(ClickWarningException):
"""
Exception class for handling keyboard interruptions.
:param msg: Custom message to display.
:type msg: Optional[str]
"""
exit_code = 0x7
[docs] def __init__(self, msg=None):
"""
Initialize the exception.
:param msg: Custom message to display.
:type msg: Optional[str]
"""
ClickWarningException.__init__(self, msg or 'Interrupted.')
[docs]def command_wrap():
"""
Decorator for wrapping Click commands.
This decorator catches exceptions and provides consistent error handling.
:return: Decorator function.
:rtype: Callable
"""
def _decorator(func):
@wraps(func)
def _new_func(*args, **kwargs):
try:
return func(*args, **kwargs)
except ClickException:
raise
except KeyboardInterrupt:
raise KeyboardInterrupted
except BaseException as err:
click.secho('Unexpected error found when running hfutils!', fg='red', file=sys.stderr)
print_exception(err, partial(click.secho, fg='red', file=sys.stderr))
sys.exit(0x1)
return _new_func
return _decorator