Git + Python

import bisect

def find_first_bad(versions):
    """Given a list of version objects with .is_bad(), find first bad version."""
    lo, hi = 0, len(versions)
    while lo < hi:
        mid = (lo + hi) // 2
        if versions[mid].is_bad():
            hi = mid
        else:
            lo = mid + 1
    return lo

clas…

from re import match
from subprocess import run

SEMVER_PATTERN = r"^v(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>0|[1-9]\d*)(?:-(?P<prerelease>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+(?P<buildmetadata>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?$"


def get_latest_tag() -> str:
    result = run(["git", "describe…

import re
import subprocess
from pathlib import Path


def get_commit_messages(path="."):
    """Read commit messages from a repo or use sample messages."""
    if (Path(path) / ".git").exists():
        out = subprocess.run(
            ["git", "-C", path, "log", "--pretty=%s"], capture_output=True, text=True
       …

class GitCommit:
    """Minimal mock of a git commit for demonstrating revert behavior."""
    def __init__(self, sha, message):
        self.sha = sha
        self.message = message
        self.parent = None


class GitRepository:
    """Mock repository tracking a simple commit chain."""
    def __init__(self):
    …