gistfile1.txt

deb_hold_packages() {
        for pkg in $*; do
                aptitude hold $pkg
                echo $pkg hold | /usr/bin/dpkg --set-selections
        done
}

deb_installnoninteractive() {
        logger -is -p local1.notice -t ec2bootstrap  "installing deb package $*"
        env DEBIAN_FRONTEND=noninteractive aptitude install -o Dpkg::Options::='--force-confdef' -o Dpkg::Options::='--force-confold'  -f -q -y $*
}

is_package_installed() {
        local pkg=$1
        local ver=$2

        if [ "deb" == "${os_packaging}" ]; then
                if [ ! -z "$ver" ]; then
                        apt-cache policy $pkg | awk '$1 ~ /^Installed:$/ && $2 ~ /'${ver}'/ {exit 13}'
                        [ $? -eq 13 ] && return 0
                        return 1
                else
                        apt-cache policy $pkg | awk '$1 ~ /^Installed:$/ && $2 !~ /(none)/ {exit 13}'
                        [ $? -eq 13 ] && return 0
                        return 1
                fi
        elif [ "rpm" == "${os_packager}" ]; then
                rpm -qi $pkg | egrep -q -e "package $1 is not installed"
                if [ $? -eq 0 ]; then
                        return 1
                elif [ ! -z "$ver" ]; then
                        version=$(rpm -qi $pkg | awk '$1 ~ /Version/ {print $3}')
                        rpm -q $pkg | egrep -q -e ${version}
                        return $?
                fi
        else
                exit 666
        fi
}

assert_package() {
        [ "X${1}" == "Xpin" ] && local pin=true && shift

        local pkg=$1
        local ver=$2

        if [ "deb" == "${os_packaging}" ]; then
#               apt-cache policy $pkg >&2 | egrep -q -e '.*Unable.*to.*locate.*package.*'${pkg}'$'
#               if [ $? -eq 0 ]; then
#                       logger -is -p local1.notice -t ec2bootstrap  "deb package ${pkg} does not exists"
#                       return 1
#               fi

                if [ ! -z "$ver" ]; then
                        apt-cache policy $pkg | awk '$1 ~ /^Installed:$/ && $2 ~ /'${ver}'/ {exit 13}'
                        [ $? -eq 0 ] && deb_installnoninteractive ${pkg}=${ver} && deb_hold_packages $pkg
                        if [ $? -eq 0 ] && test $pin; then
                                deb_hold_packages $pkg
                                deb_pin_package $pkg $ver
                        fi
                else
                        apt-cache policy $pkg | awk '$1 ~ /^Installed:$/ && $2 !~ /(none)/ {exit 13}'
                        [ $? -eq 0 ] && deb_installnoninteractive $pkg
                        if [ $? -eq 0 ] && test $pin; then
                                deb_pin_packages $pkg
                        fi
                fi
        elif [ "rpm" == "${os_packager}" ]; then
                rpm -qi $pkg | egrep -q -e "package $1 is not installed"
                if [ $? -eq 0 ]; then
                        if [ -z "$ver" ]; then
                                yum -y install $pkg
                        else
                                yum -y install ${pkg}-${ver}
                        fi
                elif [ ! -z "$ver" ]; then
                        version=$(rpm -qi $pkg | awk '$1 ~ /Version/ {print $3}')
                        rpm -q $pkg | egrep -q -e ${version}
                        [ $? -ne 0 ] && yum -y install ${pkg}-${ver}
                fi
        else
                exit 666
        fi
}