Unable to Navigate when Running sudo vim

[andreasacwu]

When using vim-tmux-navigator with sudo vim, navigation does not function as expected. It seems that tmux recognizes sudo as the active process instead of vim, causing navigation keybindings to fail.

Steps to Reproduce

1. Split tmux window into 2 panes with <prefix> %
2. Run sudo vim in the right pane
3. Inside Vim, split the window into two with :vsplit
4. Attempt to navigate to the left Vim split using <C-h>
   The navigation keys incorrectly switch focus to the other tmux pane instead of staying within Vim.

[christoomey]

Hmm, it seems like running in sudo changes some things about how vim behaves. You can try the notes in the troubleshooting guide, but I wouldn't be surprised if this plugin is incompatible with running via sudo.

[BriHan-Tech]

@christoomey @andreasacwu It seems like the is-vim issue is affecting many people, and I will do a PR on adding this script to the code.

I believe the issue is caused by the fact that the is_vim check doesn't check for nested processes and only checks for the current process.

Here is my detailed solution to the problem:

https://github.com/BriHan-Tech/is-vim