from __future__ import absolute_import, division, print_function

import os
import sys

import libtbx.load_env
from libtbx.str_utils import show_string
from libtbx.utils import Sorry

def run(args, this_command="libtbx.find_in_repositories"):
  optional = False
  if "--optional" in args:
    optional = True
    args.remove("--optional")
  if len(args) != 1:
    raise Sorry("usage: %s [--optional] name" % this_command)
  name = args[0]
  result = libtbx.env.find_in_repositories(
    relative_path=name, test=os.path.exists)
  if result is None and not optional:
    raise Sorry("%s: cannot locate %s" % (this_command, show_string(name)))
  print(result)

if __name__ == "__main__":
  run(sys.argv[1:])