Env variable to know if :terminal shell is within MacVim

[jeromedalbert]

I have this in my .zshrc:

if [ -z $TMUX ]; then; tmux-start; fi

It works well for terminal and terminal vim.

But for MacVim, I get this:

There is a tmux inside :terminal (see black bar at the bottom of the screenshot). I would like to disable tmux in macvim because I don't think it makes much sense. Maybe if I could test against an environment variable like $MACVIM available inside a :terminal, I would be able to disable this.

[edouardp]

$MYVIMRC appears to be set when I launch a terminal from within MacVim and Vim, but not from opening a new shell in Terminal.app. I'm not sure who is setting that variable, but it might be enough to test for that in your .zshrc file.

[jeromedalbert]

Thanks for the tip @edouardp. I have changed my line to

if [ -z $TMUX ] && [ -z $MYVIMRC ]; then; tmux-start; fi

and that did the trick 👍