Split base/ into base/ and tools/

Signed-off-by: Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com>

tools/pad4/Dockerfile

@@ -0,0 +1,6 @@
+FROM alpine:3.5
+
+COPY . /
+
+ENTRYPOINT ["/bin/sh", "-c"]
+CMD ["/pad4.sh"]

tools/pad4/Makefile

@@ -0,0 +1,29 @@
+.PHONY: tag push
+
+BASE=alpine:3.5
+IMAGE=pad4
+
+default: push
+
+hash: Dockerfile pad4.sh
+	DOCKER_CONTENT_TRUST=1 docker pull $(BASE)
+	tar cf - $^ | docker build --no-cache -t $(IMAGE):build -
+	docker run --rm --entrypoint=/bin/sh $(IMAGE):build -c 'cat Dockerfile pad4.sh /lib/apk/db/installed | sha1sum' | sed 's/ .*//' > hash
+
+push: hash
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		(docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash) && \
+		 docker push mobylinux/$(IMAGE):$(shell cat hash))
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+tag: hash
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash)
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+clean:
+	rm -f hash
+
+.DELETE_ON_ERROR:

tools/pad4/pad4.sh

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+#!/bin/sh
+
+set -e
+
+cd /tmp
+
+cat > initrd.img
+
+SIZE=$(stat -c "%s" initrd.img)
+SIZE4=$(( $SIZE / 4 \* 4 ))
+DIFF=$(( $SIZE - $SIZE4 ))
+[ $DIFF -ne 0 ] && DIFF=$(( 4 - $DIFF ))
+
+dd if=/dev/zero bs=1 count=$DIFF of=zeropad 2>/dev/null
+
+cat zeropad >> initrd.img
+
+SIZE=$(stat -c "%s" initrd.img)
+SIZE4=$(( $SIZE / 4 \* 4 )) 
+DIFF=$(( $SIZE - $SIZE4 ))
+
+if [ $DIFF -ne 0 ]
+then
+	echo "Bad alignment" >2
+	exit 1
+fi
+
+cat initrd.img