path_helper.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os

global_paths   = "/etc/paths"
global_paths_d = "/etc/paths.d"

user_paths   = os.path.join(os.environ['HOME'], ".paths")
user_paths_d = os.path.join(os.environ['HOME'], ".paths.d")

library_paths = os.path.join(os.environ['HOME'], ".library_paths")
include_paths = os.path.join(os.environ['HOME'], ".include_paths")
python_paths  = os.path.join(os.environ['HOME'], ".python_paths")

############################################################

def read_file(path):
    paths = []
    if os.path.exists(path):
        for line in open(path):
            paths.append(line.strip())
    return paths

def read_directory(dir):
    paths = []
    if os.path.exists(dir):
        for file in os.listdir(dir):
            paths += read_file(os.path.join(dir,file))
    return paths

def print_path(target, paths, pp=False):
    uniq = sorted(set(paths), key=paths.index)
    if(len(uniq) > 0):
        if pp:
            print target + "=\"" + ":".join(uniq) + "\""
            print "export " + target
        else:
            print target + "=\"" + ":".join(uniq) + "\"; export " + target + ";",
    
if __name__ == "__main__":
    pp = False

    ### PATH
    paths = read_file(user_paths)   + read_directory(user_paths_d) \
          + read_file(global_paths) + read_directory(global_paths_d)
    print_path("PATH", paths, pp)

    ### (DY)LD_LIBRARY_PATH
    lib  = read_file(library_paths)
    print_path(     "LIBRARY_PATH", lib, pp)
    print_path(  "LD_LIBRARY_PATH", lib, pp)
    print_path("DYLD_LIBRARY_PATH", lib, pp)

    ## INCLUDE
    inc = read_file(include_paths)
    print_path("C_INCLUDE_PATH",     inc, pp)
    print_path("CPLUS_INCLUDE_PATH", inc, pp)

    ## PYTHON
    py  = read_file(python_paths)
    print_path("PYTHONPATH", py, pp)