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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def with_git(repo, target_dir=None, limit=None, refspec="HEAD", clone=True, rev_list_args=None, version_filter=lambda version: True):
 """ Decorate a project class with git-based version information. This adds two attributes to a project class: - A `versions` method that returns a list of available versions for this project. - A `repository` attribute that provides a repository string to download from later. We use the `git rev-list` subcommand to list available versions. Args: repo (str):
 Repository to download from, this will be stored in the `repository` attribute of the decorated class. target_dir (str):
 An optional path where we should put the clone. If unspecified, we will use the `SRC_FILE` attribute of the decorated class. limit (int):
 Limit the number of commits to consider for available versions. Versions are 'ordered' from latest to oldest. refspec (str):
 A git refspec string to start listing the versions from. clone (bool):
 Should we clone the repo if it isn't already available in our tmp dir? Defaults to `True`. You can set this to False to avoid time consuming clones, when the project has not been accessed at least once in your installation. ref_list_args (list of str):
 Additional arguments you want to pass to `git rev-list`. version_filter (class filter):
 Filter function to remove unwanted project versions. """

    if not rev_list_args:
        rev_list_args = []

    def git_decorator(cls):
        from benchbuild.utils.cmd import git

        @staticmethod
        def versions_impl():
            """Return a list of versions from the git hashes up to :limit:."""
            directory = cls.SRC_FILE if target_dir is None else target_dir
            repo_prefix = local.path(str(CFG["tmp_dir"]))
            repo_loc = local.path(repo_prefix) / directory
            if source_required(repo_loc):
                if not clone:
                    return []
                git("clone", repo, repo_loc)
                update_hash(repo_loc)

            with local.cwd(repo_loc):
                rev_list = git("rev-list", "--abbrev-commit", "--abbrev=10",
                               refspec, *rev_list_args).strip().split('\n')
                latest = git("rev-parse", "--short=10",
                             refspec).strip().split('\n')
                cls.VERSION = latest[0]

            if limit:
                return list(filter(version_filter, rev_list))[:limit]

            return list(filter(version_filter, rev_list))

        def download_impl(self):
            """Download the selected version."""
            nonlocal target_dir, git
            directory = cls.SRC_FILE if target_dir is None else target_dir
            Git(self.repository, directory)
            with local.cwd(directory):
                git("checkout", self.version)

        cls.versions = versions_impl
        cls.download = download_impl
        cls.repository = repo
        return cls

    return git_decorator