xcower -Sy $aur_pkg

xcower

#! /bin/sh
TARGET_DIR=/tmp/abs
TARGET=
S_ARG=
sync=
C_ARG=
F_ARG=
PAC_F_ARG=
COWER=`which cower`

while getopts 'Sycfh:' OPTION 
do
    case $OPTION in
    S)  S_ARG="-i"
        ;;
    y)  sync=1
        ;;
    c)  C_ARG="-c"
        ;;
    f)  F_ARG="-f"
        PAC_F_ARG="--noconfirm"
        ;;
    h) echo "additional args for cower: -S -y -f."
    esac
done
shift $(($OPTIND - 1))
TARGET=$1
if [ ! -f "`which cower`" ] 
then
    mkdir -p $TARGET_DIR/cower-git
    cd $TARGET_DIR/cower-git
    wget http://aur.archlinux.org/packages/cower-git/PKGBUILD
    makepkg -ics $PAC_F_ARG
    COWER=/usr/bin/cower
fi

# how to get remain args from getopts to pass cower
# how to get last ARGS to $ARGET
if [ ! -f "$TARGET_DIR/$TARGE" ]
then
    sync=1
fi
if [ $sync ]
then
    mkdir -p $TARGET_DIR
    $COWER -d $F_ARG -t $TARGET_DIR $TARGET
fi
cd $TARGET_DIR/$TARGET
makepkg $S_ARG $C_ARG $PAC_F_ARG -s