build system: stubdom targets now depends on mini-os target

Provide mini-os url and revision in Config.mk

Make stubdom targets depend on mini-os-dir target. Make
subtree-force-update{,-all} depend on mini-os-dir-force-update.

Also make mktarball script generate mini-os archive.

Original mini-os directory is renamed to mini-os-intree to help reduce
patch length. That directory will be deleted in a separate patch.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
Changes in v3:
1. Put mini-os targets in main Makefile.
2. Stubdom clean and distclean don't depend on mini-os-dir.

Changes in v2:
1. Use hash in Config.mk.

Makefile

@@ -17,6 +17,22 @@ TARGS_DISTCLEAN=$(patsubst %, distclean-%, $(SUBSYSTEMS))
 export XEN_ROOT=$(CURDIR)
 include Config.mk
 
+.PHONY: mini-os-dir
+mini-os-dir:
+	GIT=$(GIT) $(XEN_ROOT)/scripts/git-checkout.sh \
+		$(MINIOS_UPSTREAM_URL) \
+		$(MINIOS_UPSTREAM_REVISION) \
+		$(XEN_ROOT)/extras/mini-os
+
+.PHONY: mini-os-dir-force-update
+mini-os-dir-force-update: mini-os-dir
+	set -ex; \
+	if [ "$(MINIOS_UPSTREAM_REVISION)" ]; then \
+		cd extras/mini-os-remote; \
+		$(GIT) fetch origin; \
+		$(GIT) reset --hard $(MINIOS_UPSTREAM_REVISION); \
+	fi
+
 SUBARCH := $(subst x86_32,i386,$(XEN_TARGET_ARCH))
 export XEN_TARGET_ARCH SUBARCH
 export DESTDIR
@@ -37,7 +53,7 @@ build-tools:
 	$(MAKE) -C tools build
 
 .PHONY: build-stubdom
-build-stubdom:
+build-stubdom: mini-os-dir
 	$(MAKE) -C stubdom build
 ifeq (x86_64,$(XEN_TARGET_ARCH))
 	XEN_TARGET_ARCH=x86_32 $(MAKE) -C stubdom pv-grub
@@ -84,7 +100,7 @@ install-tools:
 	$(MAKE) -C tools install
 
 .PHONY: install-stubdom
-install-stubdom: install-tools
+install-stubdom: install-tools mini-os-dir
 	$(MAKE) -C stubdom install
 ifeq (x86_64,$(XEN_TARGET_ARCH))
 	XEN_TARGET_ARCH=x86_32 $(MAKE) -C stubdom install-grub
@@ -125,11 +141,11 @@ rpmball: dist
 	bash ./tools/misc/mkrpm $(XEN_ROOT) $$($(MAKE) -C xen xenversion --no-print-directory)
 
 .PHONY: subtree-force-update
-subtree-force-update:
+subtree-force-update: mini-os-dir-force-update
 	$(MAKE) -C tools subtree-force-update
 
 .PHONY: subtree-force-update-all
-subtree-force-update-all:
+subtree-force-update-all: mini-os-dir-force-update
 	$(MAKE) -C tools subtree-force-update-all
 
 # Make a source tarball, including qemu sub-trees.