Simplify the Makefile to build slave (sonic-net#6117)

* Simplify the Makefile to build slave

* remove an empty line

Author: xumia

Makefile.work

@@ -251,30 +251,20 @@ else
 endif
 
 sonic-slave-base-build :
-	$(DOCKER_BASE_BUILD)
-
-sonic-slave-build :
-	$(DOCKER_BASE_BUILD)
-	$(DOCKER_BUILD)
-
-sonic-slave-bash :
 	@$(OVERLAY_MODULE_CHECK)
 	@docker inspect --type image $(SLAVE_BASE_IMAGE):$(SLAVE_BASE_TAG) &> /dev/null || \
 	    { echo Image $(SLAVE_BASE_IMAGE):$(SLAVE_BASE_TAG) not found. Building... ; \
 	    $(DOCKER_BASE_BUILD) ; }
+
+sonic-slave-build : sonic-slave-base-build
 	@docker inspect --type image $(SLAVE_IMAGE):$(SLAVE_TAG) &> /dev/null || \
 	    { echo Image $(SLAVE_IMAGE):$(SLAVE_TAG) not found. Building... ; \
 	    $(DOCKER_BUILD) ; }
+
+sonic-slave-bash : sonic-slave-build
 	@$(DOCKER_RUN) -t $(SLAVE_IMAGE):$(SLAVE_TAG) bash
 
-sonic-slave-run :
-	@$(OVERLAY_MODULE_CHECK)
-	@docker inspect --type image $(SLAVE_BASE_IMAGE):$(SLAVE_BASE_TAG) &> /dev/null || \
-	    { echo Image $(SLAVE_BASE_IMAGE):$(SLAVE_BASE_TAG) not found. Building... ; \
-	    $(DOCKER_BASE_BUILD) ; }
-	@docker inspect --type image $(SLAVE_IMAGE):$(SLAVE_TAG) &> /dev/null || \
-	    { echo Image $(SLAVE_IMAGE):$(SLAVE_TAG) not found. Building... ; \
-	    $(DOCKER_BUILD) ; }
+sonic-slave-run : sonic-slave-build
 	@$(DOCKER_RUN) $(SLAVE_IMAGE):$(SLAVE_TAG) bash -c "$(SONIC_RUN_CMDS)"
 
 showtag: