#!/bin/bash

APP=mqttListener

# expand PATH for go tools
export PATH=$PATH:~/go/bin


RED='\e[0;31m'
GREEN='\e[0;32m'
LIGHT_YELLOW='\e[93m'
NC='\e[0m' # No Color
BOLD='\e[1m'
NORMAL='\e[21m'

#######################################################################################
# defaults
GO_BUILD_OPTIONS=-v
#GO_BUILD_OPTIONS="-a -v"
DEFAULT_TARGET=amd64

#######################################################################################
# functions

die() { echo -e "\n${RED}$@${NC}" 1>&2 ; exit 1; }

usage() {
  echo "usage: `basename $0` [<TARGET>] [all]"
}


#######################################################################################
# build functions

build_linux_amd64() {
    echo -e "\nBuilding for Linux amd64:"
    
    env GOOS=linux GOARCH=amd64 go build ${GO_BUILD_OPTIONS} -ldflags "$(govvv -flags)" -o ${APP}-linux-amd64
    echo -e "\t\t${GREEN}... done${NC}"
}

build_linux_arm() {
    echo -e "\nBuilding for arm:"
    
    # setup environment
    export CGO_ENABLED=1
    export PATH=$PATH:/opt/devel/ptu4/buildrootBuild/host/usr/bin
    export CC=arm-linux-gcc
    export PKG_CONFIG_PATH=/opt/devel/ptu4/buildrootBuild/host/usr/lib/pkgconfig
    
    env GOOS=linux GOARCH=arm go build ${GO_BUILD_OPTIONS} -ldflags "$(govvv -flags)" -o ${APP}-linux-arm
    echo -e "\t\t${GREEN}... done${NC}"

    echo -e "\nstipping arm binary:"
    strip -o ${TARGET}-linux-arm-stripped ${APP}-linux-arm
    echo -e "\t\t${GREEN}... done${NC}"
}

#######################################################################################
# checks

echo -e "${NC}\n "


if [ ! command -v govvv &> /dev/null ] ; then
    die "govvv is not installed"	
fi	


if [ $# -eq 0 ] ; then
    echo -e "\nbuilding for default TARGET ${DEFAULT_TARGET}..."
    TARGET=${DEFAULT_TARGET}
else
    TARGET=$1
fi

#######################################################################################
# build

#cd /src


if [ "$2" == "all" ] ; then
    echo -e "\nforce rebuilding of all packages..."
    GO_BUILD_OPTIONS="-a -v"
fi


case "${TARGET}" in
"arm"|"ARM")
    build_linux_arm
    ;;
"amd64"|"AMD64")
    build_linux_amd64
    ;;
*)
    usage
    die "Target ${TARGET} is not defined"
    ;;
esac