convert tabs to spaces inside source files

spacify.py

#!/usr/bin/env python

import sys, os, subprocess

# specify the source file extension here
sources = [".cpp", ".h"]

if __name__ == "__main__":
    for root, _, files in os.walk(os.path.dirname(os.path.realpath(__file__))):
        for fname, fext in [os.path.splitext(f) for f in files]:
            if fext.lower() in sources:
                src = os.path.join(root, fname + fext)
                with open(src + ".out", "w") as fout:
                    subprocess.call(["expand", "-t", "4", "-i", src], stdout=fout)
                os.rename(src + ".out", src)
    sys.exit(0)