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

class CheckStyle(AbstractStep):
    @classmethod
    def options(cls):
        return AbstractStep.options() + [
            Options.non_interactive,
            Options.check_style,
            Options.check_style_filter,
            Options.git_commit,
        ]

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

        args = []
        if self._options.git_commit:
            args.append("--git-commit")
            args.append(self._options.git_commit)

        args.append("--diff-files")
        args.extend(self._changed_files(state))

        if self._options.check_style_filter:
            args.append("--filter")
            args.append(self._options.check_style_filter)

        if self._options.non_interactive:
            # We assume that only bots run this script in non interactive mode
            # in which case we perform additional style check
            args.append("--commit-queue")

        try:
            self._tool.executive.run_and_throw_if_fail(self._tool.deprecated_port().check_webkit_style_command() + args, cwd=self._tool.scm().checkout_root)
        except ScriptError, e:
            if self._options.non_interactive:
                # We need to re-raise the exception here to have the
                # style-queue do the right thing.
                raise e
            if not self._tool.user.confirm("Are you sure you want to continue?"):
                self._exit(1)