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"""Exception classes for all of Flake8."""


class Flake8Exception(Exception):
    """Plain Flake8 exception."""


class EarlyQuit(Flake8Exception):
    """Except raised when encountering a KeyboardInterrupt."""


class ExecutionError(Flake8Exception):
    """Exception raised during execution of Flake8."""


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, plugin_name: str, exception: Exception) -> None:
        """Initialize our FailedToLoadPlugin exception."""
        self.plugin_name = plugin_name
        self.original_exception = exception
        super().__init__(plugin_name, exception)

    def __str__(self) -> str:
        """Format our exception message."""
        return self.FORMAT % {
            "name": self.plugin_name,
            "exc": self.original_exception,
        }


class PluginRequestedUnknownParameters(Flake8Exception):
    """The plugin requested unknown parameters."""

    FORMAT = '"%(name)s" requested unknown parameters causing %(exc)s'

    def __init__(self, plugin_name: str, exception: Exception) -> None:
        """Pop certain keyword arguments for initialization."""
        self.plugin_name = plugin_name
        self.original_exception = exception
        super().__init__(plugin_name, exception)

    def __str__(self) -> str:
        """Format our exception message."""
        return self.FORMAT % {
            "name": self.plugin_name,
            "exc": self.original_exception,
        }


class PluginExecutionFailed(Flake8Exception):
    """The plugin failed during execution."""

    FORMAT = '{fname}: "{plugin}" failed during execution due to {exc!r}'

    def __init__(
        self,
        filename: str,
        plugin_name: str,
        exception: Exception,
    ) -> None:
        """Utilize keyword arguments for message generation."""
        self.filename = filename
        self.plugin_name = plugin_name
        self.original_exception = exception
        super().__init__(filename, plugin_name, exception)

    def __str__(self) -> str:
        """Format our exception message."""
        return self.FORMAT.format(
            fname=self.filename,
            plugin=self.plugin_name,
            exc=self.original_exception,
        )
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