Create a new tab in Terminal using bash and AppleScript.

new-tab

new-tab () 
{ 
    if [ "$#" -eq 1 ]; then
        COMMAND="$1";
        osascript -e "tell application \"Terminal\"" -e "tell application \"System Events\" to keystroke \"t\" using {command down}" -e "do script \"clear && $COMMAND\" in front window" -e "end tell" > /dev/null;
    else
        if [ "$#" -eq 2 ]; then
            COMMAND="$1";
            TAB_NAME="$2";
            osascript -e "tell application \"Terminal\"" -e "tell application \"System Events\" to keystroke \"t\" using {command down}" -e "do script \"clear && name-tab '$TAB_NAME' && $COMMAND\" in front window" -e "end tell" > /dev/null;
        else
            echo -e "usage: $FUNCNAME command [tab_name]\n";
        fi;
    fi
}