add *_vmdk + *_zerofree (compact) targets

Makefile

@@ -12,6 +12,7 @@ INIT_GOAL = labvm
 # custom variables
 NOINSTALL ?=
 PACKER_ARGS_EXTRA = $(call _packer_var,vm_noinstall,$(NOINSTALL))
+SUDO ?= sudo
 
 # Fresh Ubuntu Server base VM
 ubuntu-ver = 22
@@ -24,11 +25,23 @@ labvm-ver = 2023
 labvm-name = RL_$(labvm-ver)
 labvm-packer-src = ./labvm
 labvm-src-image = $(basevm-dest-image)
+define labvm-extra-rules=
+.PHONY: labvm_compact labvm_zerofree
+labvm_zerofree: labvm_compact
+labvm_compact:
+	$(SUDO) "$(FRAMEWORK_DIR)/utils/zerofree.sh" "$$(labvm-dest-image)"
+endef
 
 # Cloud-init image
 cloudvm-name = RL_$(labvm-ver)_cloud
 cloudvm-packer-src = $(FRAMEWORK_DIR)/cloudvm
 cloudvm-src-image = $(labvm-dest-image)
+define cloudvm-extra-rules=
+.PHONY: cloudvm_compact cloudvm_zerofree
+cloudvm_zerofree: cloudvm_compact
+cloudvm_compact:
+	$(SUDO) "$(FRAMEWORK_DIR)/utils/zerofree.sh" "$$(cloudvm-dest-image)"
+endef
 
 # list with all VMs to generate rules for (note: use dependency ordering!)
 build-vms += basevm labvm cloudvm