From ad623eb0d6577355eab78bd9c0fb4755d427b0af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lio=E6=9D=8E=E6=AD=90?= <lionello@users.noreply.github.com>
Date: Wed, 15 Feb 2023 10:15:30 -0800
Subject: [PATCH] build: cp Dockerfile in docker-build target (#5925)

Signed-off-by: Lionello Lunesu <lio+git@lunesu.com>
---
 Makefile.docker | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile.docker b/Makefile.docker
index 4610b1c10..768fafe50 100644
--- a/Makefile.docker
+++ b/Makefile.docker
@@ -73,7 +73,6 @@ endif
 		mkdir build/docker/$${arch}; \
 		curl -L $(GITHUB)/v$(VERSION)/coredns_$(VERSION)_linux_$${arch}.tgz > build/docker/$${arch}/coredns.tgz && \
 			( cd build/docker/$${arch}; tar xf coredns.tgz && rm coredns.tgz ); \
-			cp Dockerfile build/docker/$${arch} ; \
 	done
 
 .PHONY: docker-build
@@ -83,12 +82,16 @@ ifeq ($(DOCKER),)
 else
 	docker version
 	for arch in $(LINUX_ARCH); do \
+	    cp Dockerfile build/docker/$${arch} ; \
 	    DOCKER_BUILDKIT=1 docker build --platform=$${arch} -t $(DOCKER_IMAGE_NAME):$${arch}-$(VERSION) build/docker/$${arch} ;\
 	done
 endif
 
 .PHONY: docker-push
 docker-push:
+ifeq ($(VERSION),)
+	$(error "Please specify a version use. Use VERSION=<version>")
+endif
 ifeq ($(DOCKER),)
 	$(error "Please specify Docker registry to use. Use DOCKER=coredns for releases")
 else