build

#!/bin/bash

# A build script to automatically install dependencies (on debian, tested on ubuntu server) and build all of the projects for this repo
# Usage: $ ./build [folder name]
# you can also run './build all' or simply './build' to build all the projects
# if you want to clean the projects, you can run './build clean'
# if you want to remove the 'build' dirs, you can run './build deepclean'
# The script prompts you about missing dependencies, press 'y' to install them

# Set to 1 to skip the dependency checks.
# Automatically gets set to 1 after a successful run to not waste your time
# If you are having issues with dependencies, try setting this to 0 as a first measure
skip_dep_checks=1

odir="$(pwd)"
opt="${1:-all}"

function fail() {
	printf >&2- "$1"
	cd $odir
	exit 1
}

[[ $(id -u) == 0 ]] && fail "Don't run this script as root.\n"
[[ ! $odir =~ .*opengl_examples.* ]] && fail "Is the project root directory called 'opengl_examples'?\nIf you cloned the repo, git should have created an 'opengl_examples' directory. Run the script from there.\n"

function do_build() {
	printf "\n====================\nSubproject $1...\n\n"
	cd "$1" 								|| fail "\nDirectory $1 may not exist...\nBuild $1 failed.\n"
	if [[ ! -d build ]]; then
		mkdir -p build >> /dev/null
		cd build
		cmake .. 							|| fail "\nCMake failed...\nBuild $1 failed.\n"
	else
		cd build
	fi
	if [[ ! -z $2 ]]; then
		make "$2"							|| fail "\nTarget '$2' didn't succeed...\nBuild $1 failed.\n"
	else
		make 								|| fail "\nCode didn't compile...\nBuild $1 failed.\n"
	fi
	cd ../..
}

function dep() {
	# debian specific, you can change apt and apt-get to be
	apt list --installed "$1" 2>&1 | grep "$1" > /dev/null
	if [[ $? != 0 ]]; then
		printf "\n====================\nYou do not have $1 installed.\n"
		inp=""
		read -a inp -n 1 -p "Install it (runs apt--press \"y\"): "
		if [[ $inp == "y" ]]; then
			printf "\n"
			[[ $inp != "" ]] && printf "\n"
			sudo apt-get -y install "$1"	|| fail "Failed to install $1\n"
		else
			[[ $inp != "" ]] && printf "\n"
			fail "Failed due to missing dependency.\n"
		fi
	fi
}


if [[ $skip_dep_checks != 1 ]]; then
	dep "libglfw3-dev"
	dep "libglm-dev"
	dep "libglew-dev"
	dep "libdevil-dev"
	pt1='s/skip_dep'
	pt2='_checks=0/skip_dep_checks=1/g'
	cat build | sed -i "$pt1$pt2" build
fi

# get to the root directory
ndir=${odir%%/opengl_examples*}
cd "$ndir/opengl_examples"

if [[ $opt == "all" ]]; then
	echo "Building $opt..."
	for i in $(ls); do
		if [[ -f "$i/CMakeLists.txt" ]]; then
			do_build "$i"
		fi
	done
elif [[ $opt == "clean" ]]; then
	echo "Cleaning..."
	for i in $(ls); do
		if [[ -f "$i/CMakeLists.txt" ]]; then
			do_build "$i" clean
		fi
	done
elif [[ $opt == "deepclean" ]]; then
	echo "Deep Cleaning..."
	for i in $(ls); do
		if [[ -d "$i/build" ]]; then
			rm -fr "$i/build"
		fi
	done
else
	if [[ -f "$opt/CMakeLists.txt" ]]; then
		do_build "$opt"
	else
		fail "\n====================\nCannot build '$opt'.\n"
	fi
fi

cd $odir