#! /usr/bin/env python3

# mkreal
#
# turn a symlink to a directory into a real directory

import sys
import os
from stat import *

join = os.path.join

error = 'mkreal error'

BUFSIZE = 32*1024

def mkrealfile(name):
 st = os.stat(name) # Get the mode
 mode = S_IMODE(st[ST_MODE])
 linkto = os.readlink(name) # Make sure again it's a symlink
 f_in = open(name, 'r') # This ensures it's a file
 os.unlink(name)
 f_out = open(name, 'w')
 while 1:
 buf = f_in.read(BUFSIZE)
 if not buf: break
 f_out.write(buf)
 del f_out # Flush data to disk before changing mode
 os.chmod(name, mode)

def mkrealdir(name):
 st = os.stat(name) # Get the mode
 mode = S_IMODE(st[ST_MODE])
 linkto = os.readlink(name)
 files = os.listdir(name)
 os.unlink(name)
 os.mkdir(name, mode)
 os.chmod(name, mode)
 linkto = join(os.pardir, linkto)
 #
 for filename in files:
 if filename not in (os.curdir, os.pardir):
 os.symlink(join(linkto, filename), join(name, filename))

def main():
 sys.stdout = sys.stderr
 progname = os.path.basename(sys.argv[0])
 if progname == '-c': progname = 'mkreal'
 args = sys.argv[1:]
 if not args:
 print('usage:', progname, 'path ...')
 sys.exit(2)
 status = 0
 for name in args:
 if not os.path.islink(name):
 print(progname+':', name+':', 'not a symlink')
 status = 1
 else:
 if os.path.isdir(name):
 mkrealdir(name)
 else:
 mkrealfile(name)
 sys.exit(status)

if __name__ == '__main__':
 main()