tmux attach with percol

pattach

function pattach() {
    if [[ $1 == "" ]]; then
        PERCOL=percol
    else
        PERCOL="precol --query $1"
    fi
    sessions=$(tmux ls)
    [ $? -ne 0 ] && return
    session=$(echo $sessions | eval $PERCOL | cut -d : -f 1)
    if [[ -n "$session" ]]; then
        tmux att -t $session
    fi
}