Various fixes

scripts/common

@@ -1,6 +1,7 @@
 log (){
 	date +"[%T] $@" | tee -a ${LOG_FILE}
 }
+export -f log
 
 bootstrap(){
 	ARCH=$(dpkg --print-architecture)
@@ -18,6 +19,7 @@ bootstrap(){
 		--no-check-gpg \
 		$1 $2 $3
 }
+export -f bootstrap
 
 copy_previous(){
 	if [ ! -d ${PREV_ROOTFS_DIR} ]; then
@@ -27,6 +29,7 @@ copy_previous(){
 	mkdir -p ${ROOTFS_DIR}
 	rsync -aHAX ${PREV_ROOTFS_DIR}/ ${ROOTFS_DIR}/
 }
+export -f copy_previous
 
 unmount(){
 	if [ -z "$1" ]; then
@@ -38,10 +41,24 @@ unmount(){
 	while mount | grep -q $DIR; do
 		LOCS=`mount | grep $DIR | cut -f 3 -d ' ' | sort -r`
 		for loc in $LOCS; do
-			sudo umount $loc
+			umount $loc
 		done
 	done
 }
+export -f unmount
+
+unmount_image(){
+	sync
+	sleep 1
+	unmount $(dirname ${1})
+	LOOP_DEV=$(losetup -j ${1} | cut -f1 -d':')
+	if [ -n "${LOOP_DEV}" ]; then
+		sleep 1
+		kpartx -ds ${LOOP_DEV}
+		losetup -d ${LOOP_DEV}
+	fi
+}
+export -f unmount_image
 
 on_chroot() {
 	if ! mount | grep -q `realpath ${ROOTFS_DIR}/proc`; then
@@ -62,7 +79,10 @@ on_chroot() {
 
 	chroot ${ROOTFS_DIR}/ "$@"
 }
+export -f on_chroot
 
 update_issue() {
-	echo -e "Raspberry Pi reference ${DATE}\nGenerated using Pi-gen, https://github.com/RPi-Distro/Pi-gen, ${1}" > ${ROOTFS_DIR}/etc/rpi-issue
+	GIT_HASH=$(git rev-parse HEAD)
+	echo -e "Raspberry Pi reference ${DATE}\nGenerated using pi-gen, https://github.com/RPi-Distro/pi-gen, ${GIT_HASH}, ${1}" > ${ROOTFS_DIR}/etc/rpi-issue
 }
+export -f update_issue