handle symbol links in windows with python scirpt

symbol_links_in_windows.md

# This fixes symbol link issue you might get when
#  there are git symlinks being used on repositories that 
#  you share in both POSIX (usually the host) and Windows (VM).
#
# No warranties, good luck

import os

def rindex(lst, value):
  try:
    return lst.rindex(value)
  except ValueError:
    return -1
    
# find symbol link files or dirs
fp = os.popen("git ls-files -s | awk '/120000/{print $4}'")
links = fp.read().strip().split("\n")

# get symbol links' parent dir
link_dir = set()
for link in links:
    index = rindex(link, "/")
    if (index != -1):
      link_dir.add(link[:index])
    else:
      link_dir.add(".")
work_dir = os.getcwd()

# make link for every symbol link
for d in link_dir:
  os.chdir("/".join([work_dir,d]))
  fp = os.popen("ls -la")
  items = fp.read().strip().split("\n")
  for item in items:
    if "->" in item:
      tks = item.split("->")
      src = tks[0].strip().split(" ")[-1]
      dst = tks[1].strip().split("/")
      if (len(dst) > 1):
        dst = "\\\\".join(dst)
      else:
        dst = dst[0]
      print ("link " + src + " -> " + dst)
      os.popen("rm " + src)
      if (os.path.isfile(dst)):
        os.popen("cmd /c mklink /H " + src + " " + dst)
      else:
        os.popen("cmd /c mklink /j " + src + " " + dst)
      # make links unchanged 
      os.popen("git update-index --assume-unchanged " + "/".join([os.getcwd(), src]))