commit-msg.py

#!/usr/bin/env python
import re, sys

limit   = 2
key     = 'none'
file    = open( sys.argv[1], 'r' )
message = file.read()
tokens  = message.split()
buckets = { 'what': [], 'why': [], key: [] }

for token in tokens:
    t = token.lower()
    if t == 'what:' or t == 'why:':
        key = t[:-1]
    else:
        buckets[key].append( token )

if len( buckets['what'] ) < limit or len( buckets['why'] ) < limit:
    print( "[POLICY] Your message is not sufficiently meaningful" )
    sys.exit( 1 )