Merge pull request #168 from pwnalone/master

fix: Detect and handle nested Vim instances in Tmux

lua/smart-splits/mux/tmux.lua

@@ -2,6 +2,8 @@ local types = require('smart-splits.types')
 local Direction = types.Direction
 local log = require('smart-splits.log')
 
+local is_nested_vim = false
+
 local dir_keys_tmux = {
   [Direction.left] = 'L',
   [Direction.right] = 'R',
@@ -152,13 +154,20 @@ function M.on_init()
     log.warn('tmux init: could not detect pane ID!')
     return
   end
+  if tonumber(tmux_exec({ 'show-options', '-pqvt', pane_id, '@pane-is-vim' })) == 1 then
+    is_nested_vim = true
+    return
+  end
   tmux_exec({ 'set-option', '-pt', pane_id, '@pane-is-vim', 1 })
   if vim.v.shell_error ~= 0 then
     log.warn('tmux init: failed to detect pane_id')
   end
 end
 
 function M.on_exit()
+  if is_nested_vim then
+    return
+  end
   local pane_id = M.current_pane_id()
   if not pane_id then
     log.warn('tmux init: could not detect pane ID!')