Compares two config generated by Kconfig (for Linux kernel or buildbot, for example)

compareconfig.py

from __future__ import print_function
import sys

def load(s):
    d = {}
    for line in open(s):
        line = line.strip()
        if line.startswith('# ') and line.endswith(' is not set'):
            key = line.split()[1]
            d[key] = False
        elif not line.startswith('#') and line:
            key, value = line.split('=', 1)
            d[key] = value

    return d

A = load(sys.argv[1])
B = load(sys.argv[2])

for k, v in B.items():
    A.setdefault(k, None)

def humanize(v):
    if v is None:
        return 'not present'
    elif v is False:
        return 'not set'
    else:
        return v

for k in A:
    a, b = A[k], B.get(k, None)
    if a != b:
        print('key', k)
        print('  ', sys.argv[1] + ':', humanize(a))
        print('  ', sys.argv[2] + ':', humanize(b))
        print()