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"""Exception classes for all of Flake8."""
class Flake8Exception(Exception):
"""Plain Flake8 exception."""
pass
class EarlyQuit(Flake8Exception):
"""Except raised when encountering a KeyboardInterrupt."""
pass
class FailedToLoadPlugin(Flake8Exception):
"""Exception raised when a plugin fails to load."""
FORMAT = 'Flake8 failed to load plugin "%(name)s" due to %(exc)s.'
def __init__(self, *args, **kwargs):
"""Initialize our FailedToLoadPlugin exception."""
self.plugin = kwargs.pop('plugin')
self.ep_name = self.plugin.name
self.original_exception = kwargs.pop('exception')
super(FailedToLoadPlugin, self).__init__(*args, **kwargs)
def __str__(self):
"""Return a nice string for our exception."""
return self.FORMAT % {'name': self.ep_name,
'exc': self.original_exception}
class InvalidSyntax(Flake8Exception):
"""Exception raised when tokenizing a file fails."""
def __init__(self, *args, **kwargs):
"""Initialize our InvalidSyntax exception."""
self.original_exception = kwargs.pop('exception')
self.error_code = 'E902'
self.line_number = 1
self.column_number = 0
try:
self.error_message = self.original_exception.message
except AttributeError:
# On Python 3, the IOError is an OSError which has a
# strerror attribute instead of a message attribute
self.error_message = self.original_exception.strerror
super(InvalidSyntax, self).__init__(*args, **kwargs)
class HookInstallationError(Flake8Exception):
"""Parent exception for all hooks errors."""
pass
class GitHookAlreadyExists(HookInstallationError):
"""Exception raised when the git pre-commit hook file already exists."""
def __init__(self, *args, **kwargs):
"""Initialize the path attribute."""
self.path = kwargs.pop('path')
super(GitHookAlreadyExists, self).__init__(*args, **kwargs)
def __str__(self):
"""Provide a nice message regarding the exception."""
msg = ('The Git pre-commit hook ({0}) already exists. To convince '
'Flake8 to install the hook, please remove the existing '
'hook.')
return msg.format(self.path)
class MercurialHookAlreadyExists(HookInstallationError):
"""Exception raised when a mercurial hook is already configured."""
hook_name = None
def __init__(self, *args, **kwargs):
"""Initialize the relevant attributes."""
self.path = kwargs.pop('path')
self.value = kwargs.pop('value')
super(MercurialHookAlreadyExists, self).__init__(*args, **kwargs)
def __str__(self):
"""Return a nicely formatted string for these errors."""
msg = ('The Mercurial {0} hook already exists with "{1}" in {2}. '
'To convince Flake8 to install the hook, please remove the '
'{0} configuration from the [hooks] section of your hgrc.')
return msg.format(self.hook_name, self.value, self.path)
class MercurialCommitHookAlreadyExists(MercurialHookAlreadyExists):
"""Exception raised when the hg commit hook is already configured."""
hook_name = 'commit'
class MercurialQRefreshHookAlreadyExists(MercurialHookAlreadyExists):
"""Exception raised when the hg commit hook is already configured."""
hook_name = 'qrefresh'
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