Added multiplatform builds for i386 and arm

Author: ilijamt

Makefile

@@ -8,6 +8,7 @@ GOPACKAGES=./...
 GOFILES_GLIDE=$(shell glide novendor)
 GOFILES_NOVENDOR=$(shell find . -type f -name '*.go' -not -path "*/vendor/*")
 VERSION_FILE=VERSION
+GOBIN=$(shell which go)
 
 BUILD_VERSION:=$(shell git log --pretty=format:'%h' -n 1)
 BUILD_DATE:=$(shell date -u)
@@ -17,9 +18,25 @@ else
 	VERSION:=
 endif
 
+SYSTEM_ARCH?=$(shell uname -m)
+ifeq ($(SYSTEM_ARCH), x86)
+	SYSTEM_ARCH := 386
+else ifeq ($(SYSTEM_ARCH), x86_64)
+	SYSTEM_ARCH := amd64
+else
+	SYSTEM_ARCH := arm
+endif
+
 .PHONY: build
 build:
-	go build -ldflags "-X 'main.BuildVersion=${VERSION}' -X 'main.BuildHash=${BUILD_VERSION}' -X 'main.BuildDate=${BUILD_DATE}'" -o "${BIN_DIR}/${BIN_FILE}" .
+	${GOBIN} build -ldflags "-X 'main.BuildVersion=${VERSION}' -X 'main.BuildHash=${BUILD_VERSION}' -X 'main.BuildDate=${BUILD_DATE}'" -o "${BIN_DIR}/${BIN_FILE}" .
+
+.PHONY: build-custom
+build-custom:
+	${GOBIN} build -ldflags "-X 'main.BuildVersion=${VERSION}' -X 'main.BuildHash=${BUILD_VERSION}' -X 'main.BuildDate=${BUILD_DATE}'" -o "${BIN_DIR}/${BIN_FILE}-${GOOS}-${GOARCH}" .
+
+.PHONY: after-build
+after-build:
 	${BIN_DIR}/${BIN_FILE} --completion-script-bash > ${CONTRIB_DIR}/.${BIN_FILE}.bash
 	${BIN_DIR}/${BIN_FILE} --completion-script-zsh > ${CONTRIB_DIR}/.${BIN_FILE}.zsh
 	${BIN_DIR}/${BIN_FILE} --help-man > ${CONTRIB_DIR}/${BIN_FILE}.1
@@ -60,4 +77,28 @@ lint:
 
 .PHONY: package
 package:
-	debuild --preserve-env --preserve-envvar PATH -us -uc -d
+	debuild --preserve-env --preserve-envvar PATH -us -uc -d
+
+.PHONY: cross-build
+cross-build:
+	make repackage root=.. package=../$(BIN_FILE)_$(VERSION)_$(SYSTEM_ARCH).deb arch=386 os=linux
+	make repackage root=.. package=../$(BIN_FILE)_$(VERSION)_$(SYSTEM_ARCH).deb arch=arm os=linux
+
+.PHONY: repackage
+repackage:
+	GOOS=$(os) GOARCH=$(arch) make build-custom
+	$(eval TMP_DIR := $(shell mktemp -d))
+	mkdir -p $(TMP_DIR)/DEBIAN -p
+	dpkg-deb -x "$(package)" "$(TMP_DIR)/"
+	dpkg-deb -e "$(package)" "$(TMP_DIR)/DEBIAN/"
+ifeq ($(arch), 386)
+	sed -i "s/Architecture: amd64/Architecture: i$(arch)/g" $(TMP_DIR)/DEBIAN/control
+else ifeq ($(arch), arm)
+	sed -i "s/Architecture: amd64/Architecture: armhf/g" $(TMP_DIR)/DEBIAN/control
+else
+	sed -i "s/Architecture: amd64/Architecture: $(arch)/g" $(TMP_DIR)/DEBIAN/control
+endif
+	cp "${BIN_DIR}/${BIN_FILE}-$(os)-$(arch)" "$(TMP_DIR)/usr/bin/${BIN_FILE}"
+	cd "$(TMP_DIR)" && find usr -type f -print0 | xargs -0 md5sum > "$(TMP_DIR)/DEBIAN/md5sums"
+	dpkg-deb -b $(TMP_DIR) $(root)/$(BIN_FILE)_$(VERSION)_$(arch).deb
+	rm $(TMP_DIR) -rf

debian/rules

@@ -5,6 +5,7 @@
 
 override_dh_auto_build:
 	make build
+	make after-build
 
 override_dh_auto_install:
 	cp $$(pwd)/bin/blacklist-checker $$(pwd)/debian/blacklist-checker/usr/bin