A Fish Shell function to select and enter tmux sessions

This fish shell function gets the name of current tmux sessions and pipes the session names into the fzf prompt. The user is attached to the the tmux session selected in fzf.

function tma
    set sessions (tmux ls -F '#{session_name}')
    set session (printf %s\n $sessions | fzf --prompt=" Tmux session " --height=50% --layout=reverse --border --exit-0)
    if set -q TMUX
        set tmux_cmd switchc
        echo "In a tmux session: $TMUX"
    else
        set tmux_cmd attach
        echo "Not in a TMUX session"
    end
    tmux $tmux_cmd -t $session
end