tmux configuration conditional to OS

There's some lines of my tmux.conf which I'd like executed only if my OS is Mac. However, I'd like to use my tmux.conf on multiple different operating systems. How can I make a command conditional to the OS on which tmux is currently running?

Solution 1:

Use the if-shell command:

if-shell "uname | grep -q Darwin" "tmux-cmd1; tmux-cmd2;" "tmux-cmd3; tmux-cmd4"

You may want to put OS-specific commands in separate files, and execute them via the "source-file" command.

if-shell "uname | grep -q Darwin" "source-file .tmux-macosx" "source-file .tmux-linux"

Solution 2:

Jimeh https://github.com/jimeh/dotfiles/commit/3838db8 has the answer. Also Chris Johnsen deserves a lot of credit for helping people on the GitHub issue here: https://Github.com/ChrisJohnsen/tmux-MacOSX-pasteboard/issues/8#issuecomment-4134987

Basically, you set up a shell script called safe-reattach-to-user-namespace that checks for the existence of the real reattach... command.

#! /usr/bin/env bash

# If reattach-to-user-namespace is not available, just run the command.
if [ -n "$(command -v reattach-to-user-namespace)" ]; then
  reattach-to-user-namespace $@
else
  exec "$@"
fi