copy-here

#!/usr/bin/python

from sys import argv
from os import getenv, listdir
from os.path import join, isdir, basename, exists
from fnmatch import fnmatch
from shutil import copy2

filters = [ basename(argv[0]), '.ssh', '.git', '.gitignore' ] + open('.gitignore').read().split()

def keep(x):
    global filters
    return not any(fnmatch(basename(x), f) or fnmatch(join('/', x), f) for f in filters)

def filter_(dirlist):
    dirs, rest = [], []
    for x in sorted(filter(keep, dirlist)):
        if isdir(x):
            dirs.append(x)
        else:
            rest.append(x)
    return dirs, rest

def walk(top):
    dirs, rest = filter_(listdir(top))
    while True:
        for y in rest:
            yield y
        if not dirs:
            break
        x = dirs.pop()
        new_dirs, rest = filter_(join(x, y) for y in listdir(x))
        dirs += new_dirs

def copy_here(dry_run=False):
    home = getenv('HOME')
    n = 0
    for x in walk('.'):
        y = join(home, x)
        if not exists(y):
            print('skip', x)
            continue
        if open(x).read() == open(y).read():
            continue
        print(x)
        if not dry_run:
            copy2(y, x)
        n += 1
    print(n, 'files copied' if not dry_run else 'files to be copied')

if __name__ == '__main__':
    copy_here(len(argv) >= 2 and argv[1] == 'dry-run')