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from __future__ import annotations
from typing import Tuple
import json
from subprocess import run
from os.path import isdir, join
import hglib
def git(root: str, *args: str) -> str:
"""
Wrapper for calling command-line git in the `root` directory.
Raises an exception on any error, including a non-0 return code.
Returns the command's stdout as a string.
"""
git = ["git"]
git.extend(args)
proc = run(git, capture_output=True, cwd=root, encoding="utf-8")
if proc.returncode != 0:
raise Exception(proc.stderr or f"git command failed: {args}")
return proc.stdout
class RepoClient:
def __init__(self, root: str):
self.root = root
if isdir(join(root, ".hg")):
self.hgclient = hglib.open(root, "utf-8")
elif isdir(join(root, ".git")):
self.hgclient = None
stdout = git(self.root, "rev-parse", "--is-inside-work-tree")
if stdout != "true\n":
raise Exception("git rev-parse failed")
else:
raise Exception(f"Unsupported repository: {root}")
def close(self):
if self.hgclient:
self.hgclient.close()
def blame(self, file: str) -> list[Tuple[str, int]]:
"Return a list of (author, time) tuples for each line in `file`."
if self.hgclient:
args = hglib.util.cmdbuilder(
b"annotate",
file.encode("latin-1"),
template="json",
date=True,
user=True,
cwd=self.root,
)
blame_json = self.hgclient.rawcommand(args)
return [
(line["user"], int(line["date"][0]))
for line in json.loads(blame_json)[0]["lines"]
]
else:
lines: list[Tuple[str, int]] = []
user = ""
time = 0
stdout = git(self.root, "blame", "--porcelain", file)
for line in stdout.splitlines():
if line.startswith("author "):
user = line[7:]
elif line.startswith("author-mail "):
user += line[11:] # includes leading space
elif line.startswith("author-time "):
time = int(line[12:])
elif line.startswith("\t"):
lines.append((user, time))
return lines
def commit(self, message: str, author: str):
"Add and commit all work tree files"
if self.hgclient:
self.hgclient.commit(message, user=author.encode("utf-8"), addremove=True)
else:
git(self.root, "add", ".")
git(self.root, "commit", f"--author={author}", f"--message={message}")
def head(self) -> str:
"Identifier for the most recent commit"
if self.hgclient:
return self.hgclient.tip().node.decode("utf-8")
else:
return git(self.root, "rev-parse", "HEAD").strip()
def log(self, from_commit: str, to_commit: str) -> list[str]:
if self.hgclient:
return [
rev.desc.decode("utf-8")
for rev in self.hgclient.log(f"{to_commit} % {from_commit}")
]
else:
return (
git(
self.root,
"log",
"--pretty=format:%s",
f"{from_commit}..{to_commit}",
)
.strip()
.splitlines()
)
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