build

#!/bin/bash

BUILD_TYPE="Release"
BUILD_DIR="$BUILD_TYPE"
COMPILER="GCC"
CORES_COUNT=$(expr `nproc` - 2)
OPTION=""

build()
{
    # Keeping build start time in seconds
	start=`date +%s`

	if [ -d "$BUILD_DIR" ] && [ ! -f "$BUILD_DIR/.$COMPILER" ]
	then
		clean
	fi

	root=$(pwd)
	mkdir -pv "$BUILD_DIR"
	cd "$BUILD_DIR"

	touch ."$COMPILER"
	cmake -DCMAKE_BUILD_TYPE="$BUILD_TYPE" -DCOMPILER="$COMPILER" .. 2>&1 | tee ../build.log

	sync
	unbuffer make $MAKE_INSTALL -j ${CORES_COUNT} 2>&1 | tee -a ../build.log
	end=`date +%s`

	cd ..
	duration
}


clean()
{
	echo "Cleaning ..."
	rm -rf $BUILD_DIR
	rm -f build.log
	echo "Cleaning completed."
}

duration()
{
	duration=$((end - $start))
	echo | tee -a ./build.log
	echo "################################################################################" | tee -a ./build.log
	echo "Build time: $duration (s)" | tee -a ./build.log
	echo "################################################################################" | tee -a ./build.log
	echo | tee -a ./build.log	
}

setOption()
{
	if [ -z "$OPTION" ]
	then
		OPTION=$1
	else
		echo "Too many command-line arguments"
		help
		exit
	fi
}

# Read arguments
for argument in $@; do
	# Separate key-value pairs
	key=`echo $argument | cut -d'=' -f1`
	value=`echo $argument | cut -s -d'=' -f2-`

	case "$key" in
	"--clean" | "-c" | "c")
		setOption "CLEAN"
		;;
	"--full" | "-f" | "f")
		setOption "FULL"
		;;
    esac
done

case "$OPTION" in
	"CLEAN")
		clean
		;;
	"FULL")
		clean
		build
		;;
	*)
		build
		;;
	esac

exit