Merge "Add --list option to benchmarks" into main

    def Run(self):

        """Run all of the user-selected benchmarks."""

        # With `--list`, just list the benchmarks available.

        if self._options.List():

            print(" ".join(self._options.BenchmarkIds()))

            return

        # Clean out the log dir or create it if necessary

        prepare_log_dir(self._options.LogDir())

        parser.add_argument("--benchmark", nargs="*", default=[b.id for b in self._benchmarks],

                            metavar="BENCHMARKS",

                            help="Benchmarks to run.  Default suite will be run if omitted.")

        parser.add_argument("--list", action="store_true",

                            help="list the available benchmarks.  No benchmark is run.")

        parser.add_argument("--dist-one", action="store_true",

                            help="Copy logs and metrics to the given dist dir. Requires that only"

                                + " one benchmark be supplied. Postroll steps will be skipped.")

    def DryRun(self):

        return self._args.dry_run

    def List(self):

        return self._args.list

    def BenchmarkIds(self) :

        return [benchmark.id for benchmark in self._benchmarks]

    def _lunches(self):

        def parse_lunch(lunch):

            parts = lunch.split("-")