config.fish

gistfile1.txt

function t -d 'if tmux is running, attach it, if not, create a new tmux session, and check $SHELL'
    if not command -sq tmux
        echo tmux is not installed, please install it!
        return 1
    end

    if test (basename $SHELL) = "bash"
        if test -f ~/anaconda3/bin/fish
            set -gx SHELL ~/anaconda3/bin/fish
        else if command -sq fish
            set -gx SHELL (which fish)
        else
            echo "No fish is installed, using old $SHELL as SHELL!"
        end
    end

    # attach a session if it exists, it failed, tmux a new one, if failed, echo message
    tmux attach ^/dev/null; or tmux ^/dev/null; or echo "Already inside a tmux session, $SHELL!"
end