Makefile: rules for generating debian/ubuntu packages.

Add rules for generating debian and ubuntu packages, both natively
or using a cross-building docker image we generate as necessary.

Author: klihub

Makefile

@@ -48,13 +48,32 @@ TAR_UPDATE   := $(TAR) -uf
 TAR_COMPRESS := bzip2
 TAR_SUFFIX   := bz2
 
+# Metadata for packages, changelog, etc.
+USER_NAME  ?= $(shell git config user.name)
+USER_EMAIL ?= $(shell git config user.email)
+BUILD_DATE ?= $(shell date -R)
+
+HOST_DISTRO ?= $(shell [ -f /etc/os-release ] && eval `cat /etc/os-release`; echo $$ID)
+DEB_DISTRO  ?= ubuntu
+
 # RPM spec files we might want to generate.
 SPEC_FILES = $(shell find packaging -name \*.spec.in | sed 's/.spec.in/.spec/g' | uniq)
 
 # Systemd collateral.
 SYSTEMD_DIRS = $(shell find cmd -name \*.service -o -name \*.socket | sed 's:cmd/::g;s:/.*::g'|uniq)
 SYSCONF_DIRS = $(shell find cmd -name \*.sysconf | sed 's:cmd/::g;s:/.*::g' | uniq)
 
+# Extra options to pass to docker (for instance --network host).
+DOCKER_OPTIONS =
+
+# Docker boilerplate/commands to build debian/ubuntu packages.
+DOCKER_DEB_BUILD := mkdir -p /build && cd /build && \
+    git clone /input/cri-resource-manager && cd /build/cri-resource-manager && \
+    make BUILD_DIRS=cri-resmgr deb
+
+# Where to leave built packages, if/when we build them in containers.
+PACKAGES_DIR = packages
+
 # Be quiet by default but let folks override it with Q= on the command line.
 Q := @
 
@@ -129,7 +148,7 @@ image-%:
 	    fi; \
 	    echo "Vendoring dependencies..."; \
 	    go mod vendor && \
-	        scripts/build/docker-build --network=host $$buildopts $$src; \
+	        scripts/build/docker-build $(DOCKER_OPTIONS) $$buildopts $$src; \
 	        rc=$$?; \
 	    rm -fr vendor; \
 	    exit $$rc
@@ -176,7 +195,7 @@ test:
 	    $(GO_MODULES)
 
 #
-# Rules for building dist-tarballs, SPEC-files and RPMs.
+# Rule for building dist-tarballs, SPEC files, RPMs, debian collateral, deb's.
 #
 
 dist:
@@ -196,11 +215,10 @@ spec: clean-spec $(SPEC_FILES)
 %.spec:
 	$(Q)echo "Generating RPM spec file $@..."; \
 	eval `$(GIT_ID) .` && \
-	cat $@.in | \
-	    sed "s/__VERSION__/$$rpmversion/g" | \
-	    sed "s/__TARVERSION__/$$gitversion/g" | \
-	    sed "s/__BUILDID__/$$gitbuildid/g" \
-	> $@
+	cp $@.in $@ && \
+	sed -E -i -e "s/__VERSION__/$$rpmversion/g"    \
+	          -e "s/__TARVERSION__/$$gitversion/g" \
+	          -e "s/__BUILDID__/$$gitbuildid/g" $@
 
 clean-spec:
 	$(Q)rm -f $(SPEC_FILES)
@@ -217,6 +235,59 @@ src.rpm source-rpm: spec dist
 	cp cri-resource-manager*.tar.bz2 ~/rpmbuild/SOURCES && \
 	rpmbuild -bs ~/rpmbuild/SPECS/cri-resource-manager.spec
 
+debian/%: packaging/deb.in/%
+	$(Q)echo "Generating debian packaging file $@..."; \
+	mkdir -p debian; \
+	eval `$(GIT_ID) .` && \
+	tarball=cri-resource-manager-$$gitversion.tar && \
+	cp $< $@ && \
+	sed -E -i -e "s/__PACKAGE__/cri-resource-manager/g" \
+	          -e "s/__TARBALL__/$$tarball/g"            \
+	          -e "s/__VERSION__/$$debversion/g"         \
+	          -e "s/__AUTHOR__/$(USER_NAME)/g"          \
+	          -e "s/__EMAIL__/$(USER_EMAIL)/g"          \
+	          -e "s/__DATE__/$(BUILD_DATE)/g"           \
+	          -e "s/__BUILD_DIRS__/$(BUILD_DIRS)/g" $@
+
+clean-deb:
+	$(Q)rm -f debian
+
+deb: debian/changelog debian/control debian/rules debian/compat dist
+	$(Q)if [ -z "$$BUILD_CONTAINER" -a "$(HOST_DISTRO)" != "$(DEB_DISTRO)" ]; then \
+	    $(MAKE) deb-docker-$(DEB_DISTRO); \
+	    exit $$?; \
+	fi; \
+	dpkg-buildpackage -uc
+
+deb-docker-%: docker/%-build
+	$(Q)distro=$(patsubst deb-docker-%,%,$@); \
+	builddir=build/docker/$$distro; \
+	outdir=$(PACKAGES_DIR)/$$distro; \
+	echo "Docker cross-building $$distro packages..."; \
+	mkdir -p $(PACKAGES_DIR)/$$distro && \
+	rm -fr $$builddir && mkdir -p $$builddir && \
+	docker run --rm -ti $(DOCKER_OPTIONS) --user $(shell echo $$USER) \
+	    --env USER_NAME="$(USER_NAME)" --env USER_EMAIL=$(USER_EMAIL) \
+	    -v $$(pwd):/input/cri-resource-manager \
+	    -v $$(pwd)/$$builddir:/build \
+	    -v $$(pwd)/$$outdir:/output \
+	    $$distro-build /bin/bash -c "export DEB_DISTRO=$$distro; $(DOCKER_DEB_BUILD)" && \
+	cp $$builddir/cri-resource-manager*.* $$outdir && \
+	rm -fr $$builddir
+
+ubuntu-packages:
+	$(MAKE) DEB_DISTRO=ubuntu deb
+
+debian-packages:
+	$(MAKE) DEB_DISTRO=debian deb
+
+# Build a docker image (for distro cross-building).
+docker/%: dockerfiles/Dockerfile.%
+	$(Q)img=$(patsubst docker/%,%,$@); \
+	docker rm $$img || : && \
+	echo "Building cross-build docker image $$img..."; \
+	scripts/build/docker-build-image $$img --container $(DOCKER_OPTIONS)
+
 # Rule for recompiling a changed protobuf.
 %.pb.go: %.proto
 	$(Q)echo "Generating go code ($@) for updated protobuf $<..."; \