Gradual improvement of Makefile

Makefile

@@ -1,29 +1,54 @@
 PKG_NAME=docker-dev
+PKG_ARCH=amd64
 PKG_VERSION=1
 ROOT_PATH:=$(PWD)
-BUILD_PATH=build
+BUILD_PATH=build	# Do not change, decided by dpkg-buildpackage
 BUILD_SRC=build_src
 GITHUB_PATH=src/github.com/dotcloud/docker
 INSDIR=usr/bin
+SOURCE_PACKAGE=$(PKG_NAME)_$(PKG_VERSION).orig.tar.gz 
+DEB_PACKAGE=$(PKG_NAME)_$(PKG_VERSION)_$(PKG_ARCH).deb
 
-all:
-	cp -r $(BUILD_SRC) $(BUILD_PATH)
-	cd $(BUILD_PATH)/$(GITHUB_PATH)/docker; GOPATH=$(ROOT_PATH)/$(BUILD_PATH) go build
+TMPDIR=$(shell mktemp -d -t XXXXXX)
+
+# Build a debian source package
+all: build_in_deb
+
+build_in_deb:
+	echo "GOPATH = " $(ROOT_PATH)
+	mkdir bin
+	cd $(GITHUB_PATH)/docker; GOPATH=$(ROOT_PATH) go build -o $(ROOT_PATH)/bin/docker
 
 # DESTDIR provided by Debian packaging
-install: all
+install:
+	# Call this from a go environment (as packaged for deb source package)
 	mkdir -p $(DESTDIR)/$(INSDIR)
 	mkdir -p $(DESTDIR)/etc/init
-	install -m 0755 $(BUILD_PATH)/$(GITHUB_PATH)/docker/docker $(DESTDIR)/$(INSDIR)
-	install -o root -m 0755 $(ROOT_PATH)/etc/docker-dev.upstart $(DESTDIR)/etc/init/docker-dev.conf
+	install -m 0755 bin/docker $(DESTDIR)/$(INSDIR)
+	install -o root -m 0755 etc/docker-dev.upstart $(DESTDIR)/etc/init/docker-dev.conf
+
+$(BUILD_SRC): cleanup
+	# Copy ourselves into $BUILD_SRC to comply with unusual golang constraints
+	tar --exclude=*.tar.gz --exclude=checkout.tgz -f checkout.tgz -cz *
+	mkdir -p $(BUILD_SRC)/$(GITHUB_PATH)
+	tar -f checkout.tgz -C $(BUILD_SRC)/$(GITHUB_PATH) -xz
+	cd $(BUILD_SRC)/$(GITHUB_PATH)/docker; GOPATH=$(ROOT_PATH)/$(BUILD_SRC) go get -d
+	for d in `find $(BUILD_SRC) -name '.git*'`; do rm -rf $$d; done
+	# Populate source build with debian stuff
+	cp -R -L ./deb/* $(BUILD_SRC)
+
+$(SOURCE_PACKAGE): $(BUILD_SRC)
+	rm -f $(SOURCE_PACKAGE)
+	# Create the debian source package
+	tar -f $(SOURCE_PACKAGE) -C ${ROOT_PATH}/${BUILD_SRC} -cz .
 
 # Build deb package fetching go dependencies and cleaning up git repositories
-deb: cleanup
-	GOPATH=$(ROOT_PATH)/$(BUILD_SRC) go get -d github.com/dotcloud/docker
-	for d in `find . -name '.git*'`; do rm -rf $$d; done
-	tar czf ../$(PKG_NAME)_$(PKG_VERSION).orig.tar.gz *
-	dpkg-buildpackage
+deb: $(SOURCE_PACKAGE)
+	# dpkg-buildpackage looks for source package tarball in ../
+	cd $(BUILD_SRC); dpkg-buildpackage
 	rm -rf $(BUILD_PATH) debian/$(PKG_NAME)* debian/files
 
+debsrc: $(SOURCE_PACKAGE)
+
 cleanup:
-	rm -rf $(BUILD_PATH) debian/$(PKG_NAME)* debian/files $(BUILD_SRC)
+	rm -rf $(BUILD_PATH) debian/$(PKG_NAME)* debian/files $(BUILD_SRC) checkout.tgz