# This file is run by shell scripts generated by the aos_downloader Skylark
# macro. Everything before the first -- is a hard-coded list of files to
# download.

from __future__ import print_function

import sys
import subprocess
import re
import os

def install(ssh_target, pkg):
  """Installs a package from NI on the ssh target."""
  print('Installing', pkg)
  PKG_URL = 'http://download.ni.com/ni-linux-rt/feeds/2015/arm/ipk/cortexa9-vfpv3/' + pkg
  subprocess.check_call(['wget', PKG_URL, '-O', pkg])
  try:
    subprocess.check_call(['scp', pkg, ssh_target + ':/tmp/' + pkg])
    subprocess.check_call(['ssh', ssh_target, 'opkg', 'install', '/tmp/' + pkg])
    subprocess.check_call(['ssh', ssh_target, 'rm', '/tmp/' + pkg])
  finally:
    subprocess.check_call(['rm', pkg])


def main(argv):
  srcs = argv[1:argv.index('--')]
  args = argv[argv.index('--') + 1:]

  ROBORIO_TARGET_DIR = '/home/admin/robot_code'
  ROBORIO_USER = 'admin'

  target_dir = ROBORIO_TARGET_DIR
  user = ROBORIO_USER
  destination = args[-1]

  result = re.match('(?:([^:@]+)@)?([^:@]+)(?::([^:@]+))?', destination)
  if not result:
    print('Not sure how to parse destination "%s"!' % destination,
          file=sys.stderr)
    return 1
  if result.group(1):
    user = result.group(1)
  hostname = result.group(2)
  if result.group(3):
    target_dir = result.group(3)

  ssh_target = '%s@%s' % (user, hostname)

  rsync_cmd = (['rsync', '-c', '-v', '-z', '--copy-links'] + srcs +
               ['%s:%s' % (ssh_target, target_dir)])
  try:
    subprocess.check_call(rsync_cmd)
  except subprocess.CalledProcessError as e:
    if e.returncode == 127:
      print('Unconfigured roboRIO, installing rsync.')
      install(ssh_target, 'libattr1_2.4.47-r0.36_cortexa9-vfpv3.ipk')
      install(ssh_target, 'libacl1_2.2.52-r0.36_cortexa9-vfpv3.ipk')
      install(ssh_target, 'rsync_3.1.0-r0.7_cortexa9-vfpv3.ipk')
      subprocess.check_call(rsync_cmd)
    else:
      raise e

  subprocess.check_call(
      ('ssh', ssh_target, '&&'.join([
          'chmod u+s %s/starter_exe' % target_dir,
          'echo \'Done moving new executables into place\'',
          'bash -c \'sync && sync && sync\'',
        ])))

if __name__ == '__main__':
  main(sys.argv)