simplify STAGE checks - use In_List

Closes: #952917

scripts/build/binary_rootfs

@@ -61,9 +61,7 @@ esac
 # Creating directory
 mkdir -p binary/${INITFS}
 
-for STAGE in ${LB_CACHE_STAGES}
-do
-	if [ "${STAGE}" = "rootfs" ] && [ -d cache/binary_rootfs ]
+if In_list "rootfs" ${LB_CACHE_STAGES} && [ -d cache/binary_rootfs ]
 then
 	# Removing old chroot
 	rm -rf binary/"${INITFS}"/filesystem.*
@@ -76,7 +74,6 @@ do
 	Create_stagefile .build/binary_rootfs
 	exit 0
 fi
-done
 
 case "${LB_CHROOT_FILESYSTEM}" in
 	ext2|ext3|ext4)
@@ -443,9 +440,7 @@ case "${LB_CHROOT_FILESYSTEM}" in
 
 esac
 
-for STAGE in ${LB_CACHE_STAGES}
-do
-	if [ "${STAGE}" = "rootfs" ]
+if In_list "rootfs" ${LB_CACHE_STAGES}
 then
 	rm -rf cache/binary_rootfs
 
@@ -456,7 +451,6 @@ do
 		cp -a binary/"${INITFS}"/filesystem.* cache/binary_rootfs
 	fi
 fi
-done
 
 # Creating stage file
 Create_stagefile .build/binary_rootfs

scripts/build/bootstrap_cache

@@ -27,10 +27,11 @@ Set_defaults
 # Check architecture
 Check_crossarchitectures
 
-for STAGE in ${LB_CACHE_STAGES}
-do
-	if [ "${STAGE}" = "bootstrap" ]
+if ! In_list "bootstrap" ${LB_CACHE_STAGES}
 then
+	exit 0
+fi
+
 case "${1}" in
 	restore)
 		# Checking stage file
@@ -82,5 +83,3 @@ do
 		Create_stagefile .build/bootstrap_cache.save
 		;;
 esac
-	fi
-done

scripts/build/chroot_cache

@@ -24,10 +24,11 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-for STAGE in ${LB_CACHE_STAGES}
-do
-	if [ "${STAGE}" = "chroot" ]
+if ! In_list "chroot" ${LB_CACHE_STAGES}
 then
+	exit 0
+fi
+
 case "${1}" in
 	restore)
 		Echo_message "Restoring chroot stage from cache..."
@@ -78,5 +79,3 @@ do
 		Create_stagefile .build/chroot_cache.save
 		;;
 esac
-	fi
-done