Python script for finding the first difference between two lines. Useful for (e.g.) diffing minified JS. Usage: git diff -p some/minified/file.js | grep "^[+-]" | tail -n 2 | python diff.py

line_diff.py

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

import fileinput

lines = list(fileinput.input())

if len(lines) != 2:
    raise Exception("Input must be a pair of lines to diff")

for i, (char1, char2) in enumerate(zip(*lines)):
    if char1 != char2:
        print i, char1, char2
        if i > 0:
            break