count used c files

gistfile1.py

#!/usr/bin/env python
import os

headers = 0
c_asm = 0
mf = 0
mod_c = 0
dir_hash = {}

def countlines(filename):
    return sum(1 for i in open(path_filename).xreadlines())

#count all .h files 'cause
files = os.popen("find . -name '*.h' | grep -v [.]git").read().strip().split('\n')
for path_filename in files:
    #print path_filename
    headers += countlines(path_filename)

#count .c/S corresponding source files
files = os.popen("find . -name '*.o' | grep -v [.]git").read().strip().split('\n')
for path_filename in files:
    path = os.path.dirname(path_filename)
    filename = os.path.basename(path_filename)
    slug = filename[:filename.rfind('.')]
    c_path_filename = os.path.join(path,slug+'.c')
    if os.path.exists(c_path_filename):
        c_asm += countlines(c_path_filename)
    S_path_filename = os.path.join(path,slug+'.S')
    if os.path.exists(S_path_filename):
        c_asm += countlines(S_path_filename)
    mod_c_filename = os.path.join(path,slug+'.mod.c')
    if os.path.exists(mod_c_filename):
        mod_c += countlines(mod_c_filename)
    # Count makefile and Kconfig while we're at it
    if path in dir_hash:
        continue
    dir_hash[path] = 1
    mf_filename = os.path.join(path,'Makefile')
    if os.path.exists(mf_filename):
        mf += countlines(mf_filename)
    kc_filename = os.path.join(path,'Kconfig')
    if os.path.exists(kc_filename):
        mf += countlines(kc_filename)

#Count root makefile
mf += countlines('Makefile')

print 'headers:', headers
print 'c/asm source:', c_asm
print 'generated .mod.c:', mod_c
print 'makefile/kconfig:', mf
print 'total', headers + c_asm + mod_c + mf