Tmux exits immediately caused by reattach-to-user-namespace

[gylaz]

Tmux will exit right away if reattach-to-user-namespace isn't installed. Seems like we probably shouldn't have it in our dotfiles if not everyone is going to install it

Source: http://superuser.com/questions/397076/tmux-exits-with-exited-on-mac-os-x

[joshuaclayton]

Can we hook into this somehow to detect whether it's installed and recommend the user install it before exiting? Tmux is still usable without it but not running it is going to be more confusing when tools like open, launchctl, and other binaries don't work properly.

[derekprior]

Would a function for reattach-to-user-namespace that:

• exits doing nothing if uname != 'Darwin'
• exits with error (will this stop tmux?) and informative message if reattach-to-user-namespace isn't present
• runs reattach-to-user-namespace

... do the trick?

[croaky]

This was done in d830652