#!/bin/bash
LANGUAGE=C
LC_ALL=C
LANG=C

DEBOOTSTRAP_DIR=cache/debootstrap/
MOUNT_PATH=/mnt/debmaker

zdebmaker_getDep(){
	sudo sleep 0
	[ -d  cache ] || mkdir cache
	[ -d  dist ] || mkdir dist 
	[ -d ${DEBOOTSTRAP_DIR}  ] || debmaker_debootstrapUpdate
}

zdebmaker_createOS(){
	zdebmaker_getDep
	dd if=/dev/zero of=cache/${DEBIAN_VERSION_CODENAME}.tmp bs=100M count=5
	sudo mkfs.ext4 cache/${DEBIAN_VERSION_CODENAME}.tmp
	[ -d ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/ ] || sudo mkdir -p ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/
	sudo mount cache/${DEBIAN_VERSION_CODENAME}.tmp ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}
	sudo DEBOOTSTRAP_DIR=cache/debootstrap/ ${DEBOOTSTRAP_DIR}/debootstrap ${DEBIAN_VERSION_CODENAME} ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/
	sudo umount ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}
	mv cache/${DEBIAN_VERSION_CODENAME}.tmp cache/${DEBIAN_VERSION_CODENAME}
}

zdebmaker_createAppOS(){
	zdebmaker_getDep
	[ -f cache/${DEBIAN_VERSION_CODENAME} ] || zdebmaker_createOS

	[ "${IMAGE_SIZE}" == "" ] && IMAGE_SIZE=2
	dd if=/dev/zero of=cache/${APP}.tmp bs=1G count=${IMAGE_SIZE}
	sudo mkfs.ext4 cache/${APP}.tmp

	[ -d ${MOUNT_PATH}/${APP}/ ] || sudo mkdir -p ${MOUNT_PATH}/${APP}/
	[ -d ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/ ] || sudo mkdir -p ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/
	sudo mount cache/${APP}.tmp ${MOUNT_PATH}/${APP}/
	sudo mount cache/${DEBIAN_VERSION_CODENAME} ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}
	sudo rsync  -h -X -A --numeric-ids -aH --no-whole-file --inplace --one-file-system   ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}/*  ${MOUNT_PATH}/${APP}/
	sudo umount ${MOUNT_PATH}/${DEBIAN_VERSION_CODENAME}
	sudo umount ${MOUNT_PATH}/${APP}/
	mv cache/${APP}.tmp  cache/${APP}
}

zdebmaker_inject(){
	zdebmaker_getDep
	sudo mount cache/${APP} ${MOUNT_PATH}/${APP}/
	[ -d ${MOUNT_PATH}/${APP}/tmp/dist ] && sudo rm -fr ${MOUNT_PATH}/${APP}/tmp/dist/
	sudo mkdir ${MOUNT_PATH}/${APP}/tmp/dist/
	[ -d ${MOUNT_PATH}/${APP}/tmp/src ] && sudo rm -rf ${MOUNT_PATH}/${APP}/tmp/src/
	sudo mkdir -p ${MOUNT_PATH}/${APP}/tmp/src
	sudo cp -pfr ressources/${APP}/* ${MOUNT_PATH}/${APP}/tmp/src
	sudo cp lib/exec_in_chroot.sh ${MOUNT_PATH}/${APP}/tmp/src
	sudo find ${MOUNT_PATH}/${APP}/tmp/src -name .gitkeep -exec rm {} \;
	sudo umount  ${MOUNT_PATH}/${APP}/
}

debmaker_mount_proc_sys(){
	OPEN_FILE=$1
	OPEN_DIR=$2
	zdebmaker_getDep
	[ -d ${OPEN_FILE} ] || sudo mkdir -p ${OPEN_DIR}
	sudo mount ${OPEN_FILE} ${OPEN_DIR}
	[ -d ${OPEN_DIR}/proc ] || sudo mkdir -p ${OPEN_DIR}/proc
	sudo mount -t proc proc ${OPEN_DIR}/proc
	[ -d ${OPEN_DIR}/sys ] || sudo mkdir -p ${OPEN_DIR}/sys
	sudo mount -t sysfs sys ${OPEN_DIR}/sys
}

debmaker_umount_proc_sys(){
	OPEN_DIR=$1
	zdebmaker_getDep
	sudo umount ${OPEN_DIR}/sys
	sudo umount ${OPEN_DIR}/proc
	sudo umount ${OPEN_DIR}
}

debmaker_chroot() {
	OPEN_FILE=cache/$2${APP}
	zdebmaker_getDep
	[ -f cache/${APP} ]  || zdebmaker_createAppOS
	zdebmaker_inject
	debmaker_mount_proc_sys ${OPEN_FILE} ${MOUNT_PATH}/${APP}/
	sudo chroot ${MOUNT_PATH}/${APP}/
	debmaker_umount_proc_sys ${MOUNT_PATH}/${APP}/
}

debmaker_run(){
	zdebmaker_getDep
	[ -f cache/${APP} ]  || zdebmaker_createAppOS
	zdebmaker_inject
	debmaker_mount_proc_sys cache/${APP} ${MOUNT_PATH}/${APP}/
	for CURRENT_STEP in ${STEP}
	do
		sudo chroot ${MOUNT_PATH}/${APP}/ /tmp/src/exec_in_chroot.sh ${CURRENT_STEP}
	done
	rm -fr dist/${APP}*
	find ${MOUNT_PATH}/${APP}/tmp/dist/ -name *.deb -exec cp -v {} dist/ \;
	debmaker_umount_proc_sys ${MOUNT_PATH}/${APP}/
}

debmaker_debootstrapUpdate(){
	[ -d ${DEBOOTSTRAP_DIR}  ] || mkdir ${DEBOOTSTRAP_DIR} 
	URL=https://salsa.debian.org/installer-team/debootstrap/-/archive/master/debootstrap-master.tar.gz
	FILES="debootstrap-master/debootstrap debootstrap-master/scripts/ debootstrap-master/functions"
	wget -qO - ${URL} | tar -C ${DEBOOTSTRAP_DIR} --strip-components=1 -zx ${FILES} 
}