Get the first commit after a given date

earliest_commit.py

#! /usr/bin/env python

import sys
from datetime import date

# pip install gitpython
from git import Repo


def get_earliest_commit_since(repo, dt):
    earliest_commit = None
    count = 0
    while not earliest_commit:
        for commit in repo.iter_commits('master', skip=count):
            count += 1
            if commit.committed_datetime.date() < dt:
                return commit
    return earliest_commit


def main(args):
    dt = date(*[int(i) for i in args[1].split('-')])
    repo = Repo()
    commit = get_earliest_commit_since(repo, dt)

    if commit:
        print(
            "%s %s %s %s" % (
                commit.hexsha,
                commit.committed_datetime,
                commit.author,
                commit.message
            )
        )


if __name__ == '__main__':
    main(sys.argv)