install

#! /bin/bash

BOLD='\033[1m'
GREEN='\033[1;32m'
YELLOW='\033[1;33m'
CYAN='\033[1;36m'
RED='\033[1;31m'
RESET='\033[0m'

spin() {
  while :
  do
    sleep 5
    printf ".\n"
  done
}

installErplag () {
	make
	if [ $? -ne 0 ]
	then
		printf "\n${BOLD}${RED}ERPLAG compiler installation failed! Please check the source code for errors\n${RESET}"
		exit 1
	fi

    sudo cp .compiler /usr/local/bin
	sudo cp erplag /usr/local/bin
	sudo cp erpclr /usr/local/bin

	make clean	
}

success () {
	printf "\n${BOLD}${GREEN}ERPLAG compiler has been successfully installed!${RESET}\n"
	printf "${BOLD}${YELLOW}Use ${CYAN}erplag -h ${YELLOW}to read the guidelines for using the compiler\n${RESET}"
	printf "\nPress enter to continue..."
	read
	
	exit 0
}

###################################################################################################################################

if [ -f /usr/local/bin/erplag ]
then
	printf "${BOLD}${GREEN}ERPLAG compiler is already installed in this system${RESET}\n\n" 
	printf "Please use ${BOLD}${CYAN}./rebuild ${RESET}to quickly remake the compiler\n"
	printf "Otherwise, use ${BOLD}${CYAN}./uninstall ${RESET} to uninstall the compiler\n"
	exit 1
fi

sudo printf "Installing ERPLAG compiler... \n\n"
missing=""

which gcc &> /dev/null
if [ $? -ne 0 ]
then
	printf "${BOLD}${RED}Dependency : ${CYAN}gcc ${RED}is not installed in this system!\n${RESET}"
	missing="gcc"
fi
which make &> /dev/null
if [ $? -ne 0 ]
then
	printf "${BOLD}${RED}Dependency : ${CYAN}make ${RED}is not installed in this system!\n${RESET}"
	missing="${missing} make"
fi
which nasm &> /dev/null
if [ $? -ne 0 ]
then
	printf "${BOLD}${RED}Dependency : ${CYAN}nasm ${RED}is not installed in this system!\n${RESET}"
	missing="${missing} nasm"
fi

if [[ "$missing" == "" ]]
then
	installErplag
	success
else
	printf "${BOLD}${CYAN}\nAttempting to install missing packages...${RESET}\n"
	
	if [[ "$OSTYPE" == "linux"* ]]
	then
		#################### zypper (openSUSE) #####################
		which zypper &> /dev/null
		if [ $? -eq 0 ]
		then
			sudo zypper install -y $missing
						
			installErplag
			success
		fi
	
		#################### apt (debian) #####################
		which apt-get &> /dev/null
		if [ $? -eq 0 ]
		then
			sudo apt-get install -y $missing
			
			installErplag
			success
		fi
		
		#################### yum (Red Hat/Fedora) #####################
		which yum &> /dev/null
		if [ $? -eq 0 ]
		then
			which gcc &> /dev/null
			if [ $? -ne 0 ]
			then
				sudo yum -y install gcc
			fi

			which make &> /dev/null
			if [ $? -ne 0 ]
			then
				sudo yum -y install make
			fi
			    
			which nasm &> /dev/null
			if [ $? -ne 0 ]
			then
				which wget &> /dev/null
				if [ $? -neq 0 ]
				then
					sudo yum -y install wget
				fi
                
				wget https://www.nasm.us/pub/nasm/releasebuilds/2.14.02/linux/nasm-2.14.02-0.fc27.x86_64.rpm
				sudo yum -y install nasm-2.14.02-0.fc27.x86_64.rpm
				rm -f nasm-2.14.02-0.fc27.x86_64.rpm
 			fi
			
			installErplag
			success
		fi

		######################## pacman (Arch) ################################
		which pacman &> /dev/null
		if [ $? -eq 0 ]
		then
			sudo pacman -S $missing --noconfirm

			installErplag
			success
		fi
		
		printf "${BOLD}${RED}\nInstaller could not identify the package manager in your linux distribution. Please install ${CYAN}gcc, make, ${RED}and ${CYAN}nasm ${RED}and then run the installation script${RESET}\n"	
		exit 1
	elif [[ "$OSTYPE" == "darwin"* ]]
	then
		var=$(sudo which brew) 
		if test "$var" == ""
		then
			printf "${BOLD}${RED}Please install Homebrew or ensure that ${CYAN}gcc, make, ${RED}and ${CYAN}nasm ${RED}are installed before running the installaton script${RESET}\n" ;
			exit 1
		fi

		spin &
		SPIN_PID=$!
		brew update
		kill -9 $SPIN_PID
		wait $SPIN_PID 2>/dev/null

		spin &
		SPIN_PID=$!
		brew install gcc
		kill -9 $SPIN_PID
		wait $SPIN_PID 2>/dev/null

		spin &
		SPIN_PID=$!
		brew install make
		kill -9 $SPIN_PID
		wait $SPIN_PID 2>/dev/null

		spin &
		SPIN_PID=$!
		brew install nasm
		kill -9 $SPIN_PID
		wait $SPIN_PID 2>/dev/null
	else
		printf "${BOLD}${RED}Linux distribution could not be identified! Please install ${CYAN}gcc, make, ${RED}and ${CYAN}nasm ${RED}and then run the installation script${RESET}\n"		
		exit 1
	fi
fi