使用脚本模拟多次提交记录，主要是为了练习 git 二分法定位bug (git bisect) ，参见博客：http://www.oschina.net/translate/letting-git-bisect-help-you

make_commits.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Time    : 2017/4/30 12:00
# Author  : Albert
# Email   : albertofwb@gmail.com
# Site    : http://cnblogs.com/albertofwb
# File    : make_commits.py
# Editor  : PyCharm


import os
import subprocess

TEST_FILENAME = "file.txt"
GIT_DIR = '.git'
END_NUMBER = 10


def append_to_file(text, filename):
    with open(filename, 'a+') as fp:
        fp.write(text)


def git_commit(file_path, commit_msg):
    add_cmd = "git add %s" % file_path
    cmt_cmd = "git commit -m \"{CMT_MSG}\"".format(CMT_MSG=commit_msg)
    multi_cmd = [add_cmd, cmt_cmd]
    for cmd in multi_cmd:
        print(cmd)
        subprocess.check_output(cmd, shell=True)


def init_git():
    if os.path.exists(GIT_DIR):
        print("[exit] detect .git already exists")
        exit(1)

    cmd = "git init ."
    subprocess.check_output(cmd, shell=True)


def simulate_work():
    init_git()

    file_path = TEST_FILENAME
    end_num = END_NUMBER+1
    for i in range(1, end_num):
        text = str(i) + '\n'
        append_to_file(text, file_path)
        git_commit(TEST_FILENAME, "append '{DATA}' to {FILE}".format(DATA=i, FILE=file_path))

SCRIPT_FILE = "test.sh"
def generate_test_sh():
    script_path = SCRIPT_FILE
    script_text = \
    '''#!/bin/bash

if [[ `grep 7 file.txt` ]]; then
    exit 1
else
    exit 0
fi'''
    if os.path.exists(script_path):
        print("%s already exists" % script_path)
    else:
        print("writing\n%s to %s" %(script_text, script_path))
        open(script_path, 'w').write(script_text)


if __name__ == '__main__':
    simulate_work()
    generate_test_sh()
    os.system("git bisect run bash ./{file}".format(file=SCRIPT_FILE))