Tools/Scripts/webkitpy/tool/steps/cleanworkingdirectory.py

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from webkitpy.tool.steps.abstractstep import AbstractStep
from webkitpy.tool.steps.options import Options
from webkitpy.common.system.executive import ScriptError


class CleanWorkingDirectory(AbstractStep):

    @classmethod
    def options(cls):
        return AbstractStep.options() + [
            Options.force_clean,
            Options.clean,
        ]

    def run(self, state):
        if not self._options.clean:
            return

        if self._tool.scm().has_working_directory_changes() and not self._options.force_clean:
            raise ScriptError("Working directory has changes, pass --force-clean to continue.")

        self._tool.scm().discard_working_directory_changes()