individual bash history file for each `basename path` + screen window

.bashrc

if [ -n "$PROJECT" ];then
    if [ -n "$WINDOW" ];then
        export HISTFILE="$HOME/.bash_history.d/$PROJECT.$WINDOW"
    else
        export HISTFILE="$HOME/.bash_history.d/$PROJECT"
    fi
    if [ ! -f "$HISTFILE" ];then
        cp "$HOME/.bash_history" "$HISTFILE"
    fi
fi

function p() {
    if [ -z "$1" -o -n "$2" ];then
        echo "usage: p <session name>" 1>&2
        return 1
    else
        local proj
        if [ "$1" == "." ];then
            proj="$(pwd)"
        else
            proj="$1"
        fi
        local name="$(basename "$proj")"
        export PROJECT="$name"
        if [ -d "$proj" ];then
            cd "$proj"
        fi
        screen -S "$name" -xRR
    fi
}