Bashrc to keep a consistent tmux ssh-agent environment

.bashrc

SOCK="/tmp/ssh-agent-$USER-screen"
SOCKPTR="$(readlink -f $SOCK 2> /dev/null)"
if [[ -z $SOCKPTR ]] || [[ ! -S $SOCKPTR ]]
then

    echo -e "\e[31m\e[1mNo valid current tmux ssh-agent link\e[0m"

    if  [[ -n $SSH_AUTH_SOCK ]] && [[ -S $SSH_AUTH_SOCK ]]
    then
        rm -f $SOCK
        ln -nsf $SSH_AUTH_SOCK $SOCK
        # export SSH_AUTH_SOCK=$SOCK
        echo -e "\e[32m\e[1mSet tmux ssh-agent link to $SSH_AUTH_SOCK \e[0m"
    fi
else
    echo -e "\e[32m\e[1m Not changing tmux ssh-agent link. Already set to valid $SOCKPTR \e[0m"

fi

.tmux.conf

set-environment -g SSH_AUTH_SOCK /tmp/ssh-agent-$USER-screen