build: add a docker lint check before building a package

src/macros.mk

@@ -20,7 +20,7 @@
 # - actually output OCI files for each build (vs plain tar)
 # - output manifest.txt of all tar/digest hashes for an easy git diff
 # - support buildah and podman
-define build
+define build-pkg
 	$(eval NAME := $(1))
 	$(eval VERSION := $(if $(2),$(2),latest))
 	$(eval TARGET := $(if $(3),$(3),package))
@@ -56,3 +56,29 @@ define build
 	&& $(BUILD_CMD) \
 	&& echo $(TIMESTAMP) $(BUILD_CMD) end >> out/build.log;
 endef
+
+define check-pkg
+	$(eval NAME := $(1))
+	$(eval BUILD_CMD := \
+		DOCKER_BUILDKIT=1 \
+		BUILDKIT_MULTI_PLATFORM=1 \
+		SOURCE_DATE_EPOCH=1 \
+		$(BUILDER) \
+			build \
+			--check \
+			--progress=plain \
+			-f packages/$(NAME)/Containerfile \
+			packages/$(NAME) \
+	)
+	$(BUILD_CMD)
+endef
+
+define build
+	$(eval NAME := $(1))
+	$(eval VERSION := $(if $(2),$(2),))
+	$(eval TARGET := $(if $(3),$(3),))
+	$(eval EXTRA_ARGS := $(if $(4),$(4),))
+
+	$(call check-pkg,$(NAME))
+	$(call build-pkg,$(NAME),$(VERSION),$(TARGET),$(EXTRA_ARGS))
+endef