Move base images directory to top level

These are standalone, better to have them at the top.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

base/mkimage-iso-bios/Dockerfile

@@ -0,0 +1,16 @@
+FROM alpine:3.4
+
+RUN \
+  apk update && apk upgrade && \
+  apk add --no-cache \
+  cdrkit \
+  syslinux \
+  && true
+
+WORKDIR /tmp/iso
+
+COPY isolinux.cfg ./isolinux/
+
+COPY make-iso /usr/bin
+
+CMD [ "/usr/bin/make-iso" ]

base/mkimage-iso-bios/Makefile

@@ -0,0 +1,29 @@
+.PHONY: tag push
+
+BASE=alpine:3.4
+IMAGE=mkimage-iso-bios
+
+default: push
+
+hash:
+	DOCKER_CONTENT_TRUST=1 docker pull $(BASE)
+	tar cf - Dockerfile make-iso isolinux.cfg | docker build --no-cache -t $(IMAGE):build -
+	docker run --rm $(IMAGE):build sha1sum /lib/apk/db/installed | sed 's/ .*//' > hash
+
+push: hash
+	docker pull mobylinux/$(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:

base/mkimage-iso-bios/isolinux.cfg

@@ -0,0 +1,5 @@
+DEFAULT linux
+LABEL linux
+    KERNEL /vmlinuz64
+    INITRD /initrd.img
+    APPEND earlyprintk=serial console=ttyS0 console=tty1

base/mkimage-iso-bios/make-iso

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# input is a tarball of vmlinuz64 and initrd.img on stdin
+# output is an iso on stdout
+
+cp /usr/share/syslinux/isolinux.bin ./isolinux/
+cp /usr/share/syslinux/ldlinux.c32 ./isolinux/
+
+tar xf -
+
+genisoimage -o ../mobylinux-bios.iso -l -J -R \
+                -c isolinux/boot.cat  \
+                -b isolinux/isolinux.bin \
+                   -no-emul-boot -boot-load-size 4 -boot-info-table \
+                -V MobyLinux .
+
+isohybrid ../mobylinux-bios.iso
+
+cat ../mobylinux-bios.iso