def cmd_checkout(args: argparse.Namespace) -> None:
repo = repo_find()
assert repo is not None, "Git repository not found"
obj_sha = object_find(repo, args.commit)
assert obj_sha is not None
try:
commit_contents = commit_read(repo, obj_sha)
tree_contents = tree_read(
repo, Sha(commit_contents.kvlm[b'tree'][0].decode("ascii")))
except GitObjectTypeError:
raise ValueError(
f"Cannot checkout {args.commit} since it's not a commit!")
# Verify that path is an empty directory
path = pathlib.Path(args.path)
if path.exists():
if not path.is_dir():
raise ValueError(f"Not a directory {args.path}!")
if list(path.iterdir()):
raise ValueError(f"Not empty {args.path}!")
else:
path.mkdir(parents=True)
tree_checkout(repo, tree_contents, path.resolve())
def commit(author: str, message: str) -> str:
"""https://benhoyt.com/writings/pygit/"""
index = read_index()
if len(index) == 0:
raise ValueError("nothing to commit")
repo = repo_find()
assert repo is not None
try:
with open(str(repo_file(repo, "refs", "heads", "master")), "r") as f:
parent: Optional[str] = f.read().strip()
except FileNotFoundError:
_LOG.debug("No prior commits")
parent = None
# git write-tree
sha_of_tree = tree_write(repo, index)
# git commit-tree
lines = [f"tree {sha_of_tree}"]
if parent:
lines.append(f"parent {parent}")
author_time = author_timestamp()
lines = lines + [
f"author {author} {author_time}", f"committer {author} {author_time}",
'', message, ''
]
data = '\n'.join(lines).encode()
sha1 = generic_object_hash(io.BytesIO(data), b"commit", repo)
# git update-ref
master_path = repo_file(repo, "refs", "heads", "master", write=True)
write_file(str(master_path), (sha1 + "\n").encode())
return sha1
def cmd_add(args: argparse.Namespace) -> None:
if args.all:
repo = repo_find()
assert repo is not None
all_paths = [repo_path(repo, '.').parent]
else:
all_paths = [pathlib.Path(path) for path in args.paths]
add_all(all_paths)
def cmd_rev_parse(args: argparse.Namespace) -> None:
if args.type:
fmt = args.type.encode()
repo = repo_find()
assert repo is not None
_LOG.info(object_find(repo, args.name, fmt, follow=True))
def cmd_log(args: argparse.Namespace) -> None:
repo = repo_find()
assert repo is not None, "Git repository not found"
_LOG.info("digraph ewyaglog{")
git_object_sha = object_find(repo, args.commit)
assert git_object_sha is not None
log_graphviz(repo, git_object_sha, set())
_LOG.info("}")
def cmd_tag(args: argparse.Namespace) -> None:
repo = repo_find()
assert repo is not None
if args.name:
tag_create(repo, args.name, args.object, args.create_tag_object)
else:
refs = ref_list(repo)
show_ref(repo, refs["tags"], with_hash=False)
def read_index() -> List[GitIndexEntry]:
"""Read git index file and return list of IndexEntry objects.
https://benhoyt.com/writings/pygit/"""
FIELDS_LENGTH = 62
HEADER_LENGTH = 12
CHECKSUM_LENGTH = 20
PADDING = 8
repo = repo_find()
assert repo is not None, "Repo is None"
try:
data = open(str(repo_path(repo, "index")), 'rb').read()
except FileNotFoundError:
_LOG.debug("File .git/index not found!")
return []
# verify checksum
digest = hashlib.sha1(data[:-CHECKSUM_LENGTH]).digest()
assert digest == data[-CHECKSUM_LENGTH:], 'invalid index checksum'
# verify signature and version
signature, version, num_entries = struct.unpack(HEADER_FORMAT,
data[:HEADER_LENGTH])
assert signature == b'DIRC', \
'invalid index signature {}'.format(signature)
assert version == 2, 'unknown index version {}'.format(version)
entry_data = data[HEADER_LENGTH:-CHECKSUM_LENGTH]
entries: List[GitIndexEntry] = []
i = 0
while len(entries) < num_entries:
# calculate dimensions
fields_end = i + FIELDS_LENGTH
path_end = entry_data.index(b'\x00', fields_end)
full_entry_len = pad_to_multiple(
FIELDS_LENGTH + (path_end - fields_end), PADDING)
# read data
fields = struct.unpack(ENTRY_FORMAT, entry_data[i:fields_end])
path = entry_data[fields_end:path_end]
# next
entries.append(GitIndexEntry(*(fields + (path.decode(), ))))
i += full_entry_len
if i + FIELDS_LENGTH < len(entry_data):
_LOG.debug((
f"This index file contains extensions (signature: "
f"{entry_data[i:i+4].decode()} -> {extension_signatures[entry_data[i:i+4]]})"
))
return entries
def tree_print(obj: GitTree) -> str:
ret = ''
for i in obj.items:
try:
repo = repo_find()
assert repo is not None
fmt = object_get_type(repo, i.sha).decode()
except FileNotFoundError:
fmt = '????'
ret += f"{i.mode.decode()} {fmt} {i.sha.zfill(40)} {i.path.decode()}\n"
return ret
def cmd_ls_tree(args: argparse.Namespace) -> None:
repo = repo_find()
assert repo is not None, "Git repository not found"
obj_sha = object_find(repo, args.object, fmt=b'tree')
assert obj_sha is not None
obj_content = tree_read(repo, obj_sha)
for item in obj_content.items:
mode = "0" * (6 - len(item.mode)) + item.mode.decode("ascii")
fmt = object_get_type(repo, item.sha).decode("ascii")
_LOG.info(f"{mode} {fmt} {item.sha}\t{item.path.decode('ascii')}")
def cmd_cat_file(args: argparse.Namespace) -> None:
repo = repo_find()
if repo is None:
raise ValueError("Git repository not found!")
if args.show_type:
obj = generic_object_read(repo, args.object)
_LOG.info(obj.fmt.decode())
return
if args.pretty_print or args.type:
fmt = args.type.encode() if args.type else None
file_cat(repo, args.object, fmt=fmt)
def cmd_remote(args: argparse.Namespace) -> None:
repo = repo_find()
remotes = {}
for section in repo.conf.sections():
if not section.startswith('remote '):
continue
remote_name = section.split('"')[1]
remotes[remote_name] = {
"fetch": repo.conf.get(section, "url"),
"pull": repo.conf.get(section, "url")
}
if args.subcommand == "add":
section = f'remote "{args.name}"'
repo.add_to_config(section, {
"url": args.url,
"fetch": f"+refs/heads/*:refs/remotes/{args.name}/*"
})
elif args.subcommand == "remove":
section = f'remote "{args.name}"'
repo.conf.remove_section(f'remote "{args.name}"')
repo.write_config()
elif args.subcommand == "get-url":
print(remotes[args.name]['fetch'])
elif args.subcommand == "prune":
pass
elif args.subcommand == "rename":
old = f'remote "{args.old}"'
new = f'remote "{args.new}"'
repo.conf.add_section(new)
for option_name in repo.conf.options(old):
value = repo.conf.get(old, option_name)
repo.conf.remove_option(old, option_name)
repo.conf.set(new, option_name, value)
repo.conf.remove_section(old)
repo.write_config()
elif args.subcommand == "set-branches":
pass
elif args.subcommand == "set-head":
pass
elif args.subcommand == "set-url":
pass
elif args.subcommand is None:
for remote, value in remotes.items():
if args.verbose:
print(f"{remote}\t{value['fetch']} (fetch)")
print(f"{remote}\t{value['pull']} (push)")
else:
print(f"remote")
else:
raise ValueError(f"Unknown subcommand to remote {args.subcommand}")
def write_index(entries: List[GitIndexEntry]) -> None:
"""Write list of index entries objects to git index file.
https://github.com/benhoyt/pygit/blob/master/pygit.py"""
packed_entries = []
for entry in entries:
entry_head = struct.pack(ENTRY_FORMAT, entry.ctime[0], entry.ctime[1],
entry.mtime[0], entry.mtime[1], entry.dev,
entry.ino, entry.mode, entry.uid, entry.gid,
entry.size, entry.obj, entry.flags)
path = entry.name.encode()
length = ((62 + len(path) + 8) // 8) * 8
packed_entry = entry_head + path + b'\x00' * (length - 62 - len(path))
packed_entries.append(packed_entry)
header = struct.pack(HEADER_FORMAT, b'DIRC', 2, len(entries))
all_data = header + b''.join(packed_entries)
digest = hashlib.sha1(all_data).digest()
repo = repo_find()
assert repo is not None
with open(str(repo_file(repo, 'index', write=True)), "wb") as f:
f.write(all_data + digest)
def cmd_show_ref(args: argparse.Namespace) -> None:
repo = repo_find()
assert repo is not None
refs = ref_list(repo)
show_ref(repo, refs, prefix="refs")
def cmd_write_tree(args: argparse.Namespace) -> None:
idx = read_index()
repo = repo_find()
assert repo is not None
sha_of_tree = tree_write(repo, idx)
_LOG.info(sha_of_tree)
