#!/bin/bash

#bash script for building the g3u kernel from source
DEFCONFIG="new_defconfig"
CORECOUNT="2"
PARAMS=""
function build {
	DATE_START=$(date +"%s")
	make $DEFCONFIG
	make -j$CORECOUNT $PARAMS
	DATE_END=$(date +"%s")
	DIFF=$(($DATE_END - $DATE_START))
	echo "Time: $(($DIFF / 60)) minute(s) and $(($DIFF % 60)) seconds."
	echo
}
function clean {
	rm ./out/*.ko
	rm ./out/*.img
	rm ./out/zImage
	make clean && make mrproper
}
function pull {
	git pull
}
function push {
	git push
}
function commit {
	echo "Adding files... please wait."
	echo "If you have a lot of files, this could take a while."
	git add -A
	while read -p "What should your commit messge be?" commitmsg
	do
	case "$commitmsg" in
		* )
			git commit -a -m $commitmsg
			while read -p "should we also push to git? (y/n)" push
			do
			case "$push" in
				y|Y )
					push
					break
					;;
				* )
					break
					;;
				break
				;;
}
function makebootimg {
	cp ./arch/arm/boot/zImage ./out/zImage
	cd ./out/
	./mkbootimg --kernel zImage --ramdisk initramfs.cpio.gz --base 0x3100000 --cmdline 'no_console_suspend=1 console=null' -o boot.img
	#also copy all the module files
	cd ../
	find ./ -name "*.ko" -type f -exec cp {} ./out/ \;
}
function options {
	echo "options:
	clean	--> cleans the build enviroment
	build	--> builds with the specified amount of cores and defconfig
	push	--> push updates to git
	pull	--> pull updates from git
	commit	--> commit to git and (when specified) push to git
	makeimg	--> make the generated zImage into an actual boot.img"
}
options while read -p "What do you want to do? " cchoice do case "$cchoice" in
	clean )
		clean
		echo
		echo "All Cleaned now."
		break
		;;
	build )
		build
		makebootimg
		break
		;;
	pull )
		pull
		break
		;;
	makeimg )
		makebootimg
		break
		;;
	push )
		push
		break
		;;
	commit )
		commit
		break
		;;
	* )
		echo
		echo "Invalid try again!"
		options
		;;
esac
done