Batch script to resolve large git conflicts.

git_batch_resolver.py

#!/usr/bin/env python3

"""
Author: Ming Wen (bitmingw@gmail.com)

When resolving conflicts on a merge or rebase, this script
automates `git add/rm` and `git checkout` with --ours or --theirs
for a large batch of changes.

Usage: `python3 git_batch_resolver.py` in your git repository.

Note:
  in `git merge`, ours -> current branch, theirs -> other branch
  in `git rebase`, ours -> other branch, theirs -> current branch

MIT License

Copyright (c) 2020 Ming Wen

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""

import fileinput
import os
from subprocess import check_output


BOTH_ADDED = "both added:"
BOTH_MODIFIED = "both modified:"
ADDED_BY_US = "added by us:"
ADDED_BY_THEM = "added by them:"
DELETED_BY_US = "deleted by us:"
DELETED_BY_THEM = "deleted by them:"


def main():
    stat = read_stat()
    prompt = "To solve conflict, use (o)urs, (t)heirs or (a)bort? "
    while True:
        response = input(prompt)
        if len(response) == 0 or (response[0] not in ["o", "t", "a"]):
            prompt = "Invalid option. Type [o/t/a]. Please try again: "
        else:
            break
    if response[0] == "o":
        for f in stat["both-added"]:
            check_output("git add " + f, shell=True)
        for f in stat["both-modified"]:
            check_output("git checkout --ours " + f, shell=True)
            check_output("git add " + f, shell=True)
        for f in stat["added-by-us"]:
            check_output("git add " + f, shell=True)
        for f in stat["added-by-them"]:
            check_output("git rm " + f, shell=True)
        for f in stat["deleted-by-us"]:
            check_output("git rm " + f, shell=True)
        for f in stat["deleted-by-them"]:
            check_output("git add " + f, shell=True)
    elif response[0] == "t":
        for f in stat["both-added"]:
            check_output("git add " + f, shell=True)
        for f in stat["both-modified"]:
            check_output("git checkout --theirs " + f, shell=True)
            check_output("git add " + f, shell=True)
        for f in stat["added-by-us"]:
            check_output("git rm " + f, shell=True)
        for f in stat["added-by-them"]:
            check_output("git add " + f, shell=True)
        for f in stat["deleted-by-us"]:
            check_output("git add " + f, shell=True)
        for f in stat["deleted-by-them"]:
            check_output("git rm " + f, shell=True)
    elif response[0] == "a":
        print("Action abort by user.")
        return

    print("\n==== results: git status ====")
    res = str(check_output(["git", "status"]), encoding='utf-8')
    res = res.split("\n")
    for line in res:
        print(line)
    print("==== end of result ====")
    print("Please resolve remaining issues manually. Thanks!")


def read_stat():
    check_output("git status > _tmp.txt", shell=True)
    stat = {"both-added": [],
            "both-modified": [],
            "added-by-us": [],
            "added-by-them": [],
            "deleted-by-us": [],
            "deleted-by-them": []}
    print("==== git status ====")
    for line in fileinput.input("_tmp.txt"):
        print(line, end="")
        if match_str_head(line, BOTH_ADDED):
            stat["both-added"].append(
                extract_path(line, BOTH_ADDED))
        elif match_str_head(line, BOTH_MODIFIED):
            stat["both-modified"].append(
                extract_path(line, BOTH_MODIFIED))
        elif match_str_head(line, ADDED_BY_US):
            stat["added-by-us"].append(
                extract_path(line, ADDED_BY_US))
        elif match_str_head(line, ADDED_BY_THEM):
            stat["added-by-them"].append(
                extract_path(line, ADDED_BY_THEM))
        elif match_str_head(line, DELETED_BY_US):
            stat["deleted-by-us"].append(
                extract_path(line, DELETED_BY_US))
        elif match_str_head(line, DELETED_BY_THEM):
            stat["deleted-by-them"].append(
                extract_path(line, DELETED_BY_THEM))
    print("==== end of git status ====\n")
    os.remove("_tmp.txt")
    return stat


def match_str_head(s, template):
    s = s.strip()
    return True if s.find(template) == 0 else False


def extract_path(s, template):
    s = s.strip()
    assert match_str_head(s, template)
    s = s[len(template):]  # remove prefix
    return s.strip()


if __name__ == "__main__":
    main()

Nice