" Nvim plugin for loading python extensions via an external interpreter
if exists("did_python_setup") || &cp
  finish
endif
let did_python_setup = 1


let s:get_version =
  \ ' -c "import sys; sys.stdout.write(str(sys.version_info.major))"'

" To load the python host a python 2 executable must be available
if exists('python_interpreter')
      \ && executable(g:python_interpreter)
      \ && system(g:python_interpreter.s:get_version) == "2"
  let s:python_interpreter = g:python_interpreter
elseif executable('python') &&
      \ system('python'.s:get_version) == "2"
  let s:python_interpreter = 'python'
elseif executable('python2') &&
      \ system('python2'.s:get_version) == "2"
  " In some distros, python3 is the default python
  let s:python_interpreter = 'python2'
else
  finish
endif

" Execute python, import neovim and print a string. If import_result matches
" the printed string, we can probably start the host
let s:import_result = substitute(system(
      \ s:python_interpreter .' -c "import neovim; print \"ok\""'),
      \ '^[\s\n]*\(ok\)[\s\n]*$', '\1', '')
if s:import_result != 'ok'
  finish
endif

let s:pyhost_id = api_spawn(s:python_interpreter,
      \ ['-c', 'import neovim; neovim.start_host()'])
" Evaluate an expression in the script host as an additional sanity check, and
" to block until all providers have been registered(or else some plugins loaded
" by the user's vimrc would not get has('python') == 1
if send_call(s:pyhost_id, 'python_eval', '"o" + "k"') != 'ok' || !has('python')
  " Something went wrong
  api_close(s:pyhost_id)
endif