Recursive C header guard generator in Python

[fips]

Here's a piece of Python code that I've put together today to help me automatically generate C header guards (I'm too tired of wasting my time by managing them manually, I don't want to do that any more!). Anyway, the script basically goes through the project structure and recursively scans header files for strings that begin with "FS_HEADER_", every each of them is then replaced by a new one that consists of two parts: a directory sequence and the header file itself.

For example, for '../fs/math/vector3.h' the final guard looks like this:

#define FS_HEADER__fs__math__vector3_h__GUARD

#!/usr/bin/env python
# Recursive C header guard generator, ver 1.0
# (c) 2011 Filip STOKLAS (FipS), http://www.4FipS.com
# THIS CODE IS FREE - LICENSED UNDER THE MIT LICENSE

import sys
import os
import re
import fileinput

key = "FS_HEADER_"

def list_files_rec(root):
    res = []
    for cur_root, dirs, files in os.walk(root):
        for file in files:
            res.append(os.path.join(cur_root, file))
    return res

def replace_str_in_file(file, cur, new):
    for line in fileinput.FileInput(file, inplace=1):
        line = re.sub(cur + r"(\w*)", new, line)
        print line,

def main(root):
    for file in list_files_rec(root):
        if file[-2:] == ".h":
            print file
            cur = re.sub(r"[/\\]", "__", file)
            cur = re.sub(r"\W+", "_", cur)
            cur = cur.lstrip("_")
            replace_str_in_file(file, key, key + "_" + cur + "__GUARD")

if __name__ == "__main__":
    if len(sys.argv) == 2: 
        main(sys.argv[1])
    else:
        print "Usage: refresh_quards.py <dir>"

[fips]

And here's another one that converts C includes (the part between quotes) to lower-case:

#!/usr/bin/env python
# Recursive C include to lower-case convertor, ver 1.0
# (c) 2011 Filip STOKLAS (FipS), http://www.4FipS.com
# THIS CODE IS FREE - LICENSED UNDER THE MIT LICENSE

import sys
import os
import re
import fileinput

def list_files_rec(root):
    res = []
    for cur_root, dirs, files in os.walk(root):
        for file in files:
            res.append(os.path.join(cur_root, file))
    return res

def transform_file(file):
    for line in fileinput.FileInput(file, inplace=1):
        line = re.sub(r"#include[ ]*(\"[^\"]*)", lambda pat: "#include " + pat.group(1).lower(), line)
        print line,

def main(root):
    for file in list_files_rec(root):
        if file[-2:] == ".h" or file[-4:] == ".cpp":
            print file
            transform_file(file)

if __name__ == "__main__":
    if len(sys.argv) == 2: 
        main(sys.argv[1])
    else:
        print "Usage: lower_includes.py <dir>"

[ganxtr]

thanks for this nice code