splunk-diff

#!/usr/bin/env python
import datetime
import difflib
import sys
import re


def lines(fn):
    return open(fn).readlines()

def want(line):
    if re.search("^[+-][^+-]{2}", line):
        return True

def change(line):
    rest = line[1:].rstrip()

    if line[0] == '+':
        return "added", rest

    if line[0] == '-':
        return "removed", rest

def show_diff(a, b):
    now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

    diff = difflib.unified_diff(lines(a), lines(b))
    for line in filter(want, diff):
        op, what = change(line)
        print "%s %s %s" % (now, op, what)

if __name__ == "__main__":
    if len(sys.argv) != 3:
        sys.stderr.write("Usage: %s file1 file2\n" % sys.argv[0])
        sys.exit(1)
    a = sys.argv[1]
    b = sys.argv[2]
    show_diff(a,b)