RSA/build

#!/usr/bin/env bash

export GOPATH=$PWD
LAST_CMD=
APP_NAME="main"

RED='\033[0;31m'    # red
GRN='\033[0;32m'    # green
YLO='\033[0;33m'    # yellow
CLR='\033[0m'       # clear color
BLD='\033[1m'       # BOLD-weight

function prntg {
    echo -e "${GRN}${1}${CLR}"
}

function prntr {
    echo -e "${RED}${1}${CLR}"
}

function prnty {
    echo -e "${YLO}${1}${CLR}"   
}

function prntb {
    echo -e "${BLD}${1}${CLR}"
}

function set_gvar {
    eval "${1}="${2}""
}

function opt_set {
    [[ ${1} -eq 1 ]] && prntg "${2}" || prnty "${3}"
}

function error_halt {
    if [ ${1} -ne 0 ]; then
        read -p "$(prntr "Error") Press any key to continue"
    fi
    return ${1}
}

function _cmd {
    prntb "CMD: $(prnty "${1}")"
    ${1}
    error_halt $?
}

function go_build {
    _cmd "go build ${APP_NAME}"
}

function go_install {
    _cmd "go install ${APP_NAME}"
}

function go_run {
    _cmd "./bin/${APP_NAME}"
    read -p "Press any key to continue"
}

function main {
    clear
    echo "i: install     b: build    r: run" 
    echo "x: exit"
    read -p "Option(s) $([[ -z ${LAST_CMD} ]] && echo "" || echo "[${LAST_CMD}]"): " REPLY
    if [ -z ${REPLY} ]; then
        REPLY="${LAST_CMD}"
    fi
    LAST_CMD="${REPLY}"
    for((I=0; I<${#REPLY};I++)); do
        clear
        case "${REPLY:${I}:1}" in
            [Bb] )
               go_build
               ;;
            [Ii] )
                go_install
                ;;
            [Rr] )
                go_run
                ;;
            [Xx] )
                exit 0
                ;;
        esac
    done
    main
}

main