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import sys

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


class AbstractStep(object):
    def __init__(self, tool, options):
        self._tool = tool
        self._options = options

    def _exit(self, code):
        sys.exit(code)

    @classmethod
    def options(cls):
        return [
            # We need this option here because cached_lookup uses it.  :(
            Options.git_commit,
        ]

    def run(self, state):
        raise NotImplementedError, "subclasses must implement"