count-words.py

#!/usr/bin/env python

import sys
from subprocess import Popen, PIPE
from os import path

filename = 'gitoutput.txt'

commit_old = raw_input("Enter the original commit ID: ")
commit_new = raw_input("Enter the new commit ID: ")
 
git_command = "/usr/bin/git diff " + commit_old + ".." + commit_new + " --word-diff=porcelain > " + filename
git_query = Popen(git_command, shell=True, stdout=PIPE, stderr=PIPE)
output = git_query.communicate()[0]

f=open(filename,'r')
newwords=0
delwords=0
for lines in f:
	f1=lines.split()
	try:
		f2=f1[0]
		f3=f2[0]
		if f3=='+':
			newwords=newwords+len(f1)
		elif f3=='-':
			delwords=delwords+len(f1)
	except:	
		print "Line not counted (either empty or contains unchanged words)"
f.close()
	
networds=newwords-delwords
print 'new words:', str(newwords)
print 'deleted words:', str(delwords)
print 'net additions:', str(networds)