code: def main(argv: List[str] = None) -> None:
      desc = "WeiGit: A git-like tool for model weight tracking"
  
      # top level parser and corresponding subparser
      parser = argparse.ArgumentParser(description=desc)
      subparsers = parser.add_subparsers(dest="command")
  
      # Version
      version_parser = subparsers.add_parser(
          "version", description="Display version"
      )
      version_parser.set_defaults(command="version", subcommand="")
  
      # Repo
      init_parser = subparsers.add_parser(
          "init", description="Initialize a weigit repo"
      )
      init_parser.add_argument(
          "init", action="store_true", help="initialize the repo"
      )
  
      status_parser = subparsers.add_parser(
          "status", description="Shows the repo's current status"
      )
      status_parser.add_argument(
          "status",
          action="store_true",
          help="Show the repo's current status",
      )
  
      add_parser = subparsers.add_parser(
          "add",
          description="add a file to the staged changeset (default: none)",
      )
      add_parser.add_argument(
          "add",
          default="",
          type=str,
          metavar="FILE_PATH",
          help="add a file to the staged changeset (default: none)",
      )
      add_parser.add_argument(
          "--no_per_tensor",
          action="store_true",
          help="Disable per-tensor adding of a file",
      )
  
      commit_parser = subparsers.add_parser(
          "commit", description="Commits the staged changes"
      )
      commit_parser.add_argument(
          "commit",
          action="store_true",
          help="Commit the staged changes",
      )
      commit_parser.add_argument(
          "-m",
          "--message",
          default="",
          type=str,
          metavar="MESSAGE",
          required=True,
          help="commit message",
      )
  
      checkout_parser = subparsers.add_parser(
          "checkout", description="checkout from a commit"
      )
      checkout_parser.add_argument(
          "checkout",
          default="",
          type=str,
          metavar="FILE_SHA1",
          help="checkout from a commit",
      )
  
      log_parser = subparsers.add_parser(
          "log",
          description="Show the history log of the repo or optionally of a file.",
      )
      log_parser.add_argument(
          "log", action="store_true", help="Show the repo's history log"
      )
      log_parser.add_argument(
          "-f",
          "--file",
          default="",
          type=str,
          metavar="FILE_PATH",
          help="Show the history log of a file",
      )
  
      args = parser.parse_args(argv)
  
      if args.command == "init":
          repo = Repo(Path.cwd(), init=True)
  
      if args.command == "add":
          repo = Repo(Path.cwd())
          repo.add(args.add, per_tensor=not args.no_per_tensor)
  
      if args.command == "status":
          repo = Repo(Path.cwd())
          out = repo.status()
          print(out)
  
      if args.command == "log":
          repo = Repo(Path.cwd())
          repo.log(args.file)
  
      if args.command == "commit":
          repo = Repo(Path.cwd())
          repo.commit(args.message)
  
      if args.command == "checkout":
          repo = Repo(Path.cwd())
          repo.checkout(args.checkout)
  
      if args.command == "version":
          print(".".join([str(x) for x in version.__version_tuple__]))
  
imports: import argparse
  from pathlib import Path
  from typing import List
  from .None import Repo, version
label_desc: Use image node_id 1 for calling a global function with example usage: main(argv) without return types