Open file in Neovide

launch.sh

# Only tested on macOS, but should work anywhere where you can specify a shell script as the program to open a file with
# On macOS, create an Automator app, then create a "Run Shell Script" step and run this script.

PID=`grep -oE "([0-9]+)\.0$" "$HOME/.neovide" | rev | cut -c3- | rev`
if ps -p $PID > /dev/null; then
	command nvim --server `cat $HOME/.neovide` --remote-send "<Cmd>NeovideFocus<CR>"
  # Remove the following line if you don't want the file to open in a new tab
	command nvim --server `cat $HOME/.neovide` --remote-send "<Cmd>tabnew<CR>"
	command nvim --server `cat $HOME/.neovide` --remote-send "<Cmd>lua vim.schedule_wrap(vim.cmd.e)('$1')<CR>"
else
	neovide -- "$1"
fi

vim.lua

-- Add this anywhere in your Neovim startup config
-- Otherwise the shell script won't be able to determine where the pipe to the Neovim backend is
-- This also comes with the caveat that the script will always open the file in the most recently started instance of Neovide
if vim.g.neovide then
  local id = vim.fn.jobstart "/usr/bin/env sh"
  if id > 0 then
    vim.fn.chansend(id, "echo $NVIM > ~/.neovide\n")
    vim.fn.jobwait({ id }, 1000)
  end
end