(OSX) Can't run gvim from gvim

Question

I make a file called run_gvim_thing.sh in my home dir. Inside of that is the command gvim myfile.py && echo "yay". If I run that file from terminal it launches gvim with myfile.py. If I run that file from ex mode it does nothing but echos "yay"

Why is this?

When logging gvim for errors I caught this:

Fatal Python error: Py_Initialize: can't initialize sys standard streams
OSError: [Errno 9] Bad file descriptor

Answer 1

I put this at the top of the .vimrc to fix it. But instead of calling :!gvim some_file.py you need to call Runit('gvim some_file.py')

python3 << EOF
from multiprocessing import Process
import os

def worker(x):
  os.system(x) 

def do(x):
  Process(target=worker, args=(x,)).start()
EOF

function! Runit(command)
python3 << EOF
command = vim.eval('g:command')
do(command)
EOF
endfunction

After doing some error logging it was clear that the problem was something to do with python3 not releasing some file if called from a vim instance. So I thought maybe spawning a new python instance from vim and calling it from there would work, and it did.

Hopefully the MacVim people patch this up.