149 lines
4.7 KiB
Python
149 lines
4.7 KiB
Python
import argparse
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import collections
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import configparser
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from datetime import datetime
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from fnmatch import fnmatch
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import hashlib
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from math import ceil
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import os
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import re
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import sys
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import zlib
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argparser = argparse.ArgumentParser(description="The stupidest content tracker")
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argsubparsers = argparser.add_subparsers(title="Commands", dest="command")
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argsubparsers.required = True
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def main(argv=sys.argv[1:]):
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args = argparser.parse_args(argv)
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match args.command:
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case "add" : cmd_add(args)
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case "cat-file" : cmd_cat_file(args)
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case "check-ignore" : cmd_check_ignore(args)
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case "checkout" : cmd_checkout(args)
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case "commit" : cmd_commit(args)
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case "hash-object" : cmd_hash_object(args)
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case "init" : cmd_init(args)
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case "log" : cmd_log(args)
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case "ls-files" : cmd_ls_files(args)
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case "ls-tree" : cmd_ls_tree(args)
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case "rev-parse" : cmd_rev_parse(args)
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case "rm" : cmd_rm(args)
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case "show-ref" : cmd_show_ref(args)
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case "status" : cmd_status(args)
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case "tag" : cmd_tag(args)
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case _ : print("Bad command.")
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class GitRepository (object):
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"""A git repo"""
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worktree = None
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gitdir = None
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conf = None
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def __init__(self, path, force=False):
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self.worktree = path
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self.gitdir = os.path.join(path, ".git")
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if not (force or os.path.isdir(self.gitdir)):
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raise Exception(f"Not a git repository {path}")
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# Read configuration file in .git/config
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self.conf = configparser.ConfigParser()
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cf = GitRepository.repo_file(self, "config")
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if cf and os.path.exists(cf):
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self.conf.read([cf])
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elif not force:
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raise Exception("Configuration file missing")
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if not force:
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vers = int(self.conf.get("core", "repositoryformatversion"))
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if vers != 0:
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raise Exception(f"Unsupported repositoryformatversion {vers}")
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def repo_path(repo, *path):
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"""Compute path under repo's gitdir."""
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return os.path.join(repo.gitdir, *path)
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def repo_file(repo, *path, mkdir=False):
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"""Same as repo_path, but create dirname(*path) if absent. For
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example, repo_file(r, \"refs\", \"remotes\", \"origin\", \"HEAD\") will create
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.git/refs/remotes/origin."""
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if GitRepository.repo_dir(repo, *path[:-1], mkdir=mkdir):
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return GitRepository.repo_path(repo, *path)
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def repo_dir(repo, *path, mkdir=False):
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"""Same as repo_path, bt mkdir *path if absent if mkdir"""
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path = GitRepository.repo_path(repo, *path)
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if (os.path.exists(path)):
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if (os.path.isdir(path)):
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return path
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else:
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raise Exception(f"Not a directory {path}")
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if mkdir:
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os.makedirs(path)
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return path
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else:
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return None
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def repo_create(path):
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"""Create a new repository at path."""
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repo = GitRepository(path, True)
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# First, we make sure the path either doesn't exist or is an
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# empty dir.
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if os.path.exists(repo.worktree):
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if not os.path.isdir(repo.worktree):
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raise Exception(f"{path} is not a directory!")
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if os.path.exists(repo.gitdir) and os.listdir(repo.gitdir):
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raise Exception(f"{path} is not empty!")
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else:
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os.makedirs(repo.worktree)
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assert GitRepository.repo_dir(repo, "branches", mkdir=True)
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assert GitRepository.repo_dir(repo, "objects", mkdir=True)
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assert GitRepository.repo_dir(repo, "refs", "tags", mkdir=True)
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assert GitRepository.repo_dir(repo, "refs", "heads", mkdir=True)
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# .git/description
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with open(GitRepository.repo_file(repo, "description"), "w") as f:
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f.write("Unnamed repository; edit this file 'description' to name the repository")
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with open(GitRepository.repo_file(repo, "HEAD"), "w") as f:
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f.write("ref: refs/heads/master\n")
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with open(GitRepository.repo_file(repo, "config"), "w") as f:
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config = repo_default_config()
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config.write(f)
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return repo
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def repo_default_config():
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ret = configparser.ConfigParser()
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ret.add_section("core")
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ret.set("core", "repositoryformatVersion", "0")
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ret.set("core", "filemode", "false")
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ret.set("core", "bare", "false")
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return ret
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argsp = argsubparsers.add_parser("init", help="Initialize a new, empty repository.")
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argsp.add_argument("path",
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metavar="directory",
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nargs="?",
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default=".",
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help="Where to create the repository.")
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def cmd_init(args):
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repo_create(args.path)
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