Add makefile

build, cross, test, clean

Author: r2d4

.gitignore

@@ -1 +1,2 @@
 tests/*_actual.json
+out/*

Makefile

@@ -0,0 +1,42 @@
+VERSION_MAJOR ?= 0
+VERSION_MINOR ?= 2
+VERSION_BUILD ?= 0
+
+GOOS ?= $(shell go env GOOS)
+GOARCH = amd64
+BUILD_DIR ?= ./out
+ORG := github.com/GoogleCloudPlatform
+PROJECT := container-diff
+REPOPATH ?= $(ORG)/$(PROJECT)
+
+SUPPORTED_PLATFORMS := linux-amd64 darwin-amd64
+BUILD_PACKAGE = $(REPOPATH)
+
+# These build tags are from the containers/image library.
+# 
+# container_image_ostree_stub allows building the library without requiring the libostree development libraries
+# container_image_openpgp forces a Golang-only OpenPGP implementation for signature verification instead of the default cgo/gpgme-based implementation
+GO_BUILD_TAGS := "container_image_ostree_stub containers_image_openpgp"
+GO_FILES := $(shell go list  -f '{{join .Deps "\n"}}' $(BUILD_PACKAGE) | grep $(ORG) | xargs go list -f '{{ range $$file := .GoFiles }} {{$$.Dir}}/{{$$file}}{{"\n"}}{{end}}')
+
+$(BUILD_DIR)/$(PROJECT): out/$(PROJECT)-$(GOOS)-$(GOARCH)
+	cp $(BUILD_DIR)/$(PROJECT)-$(GOOS)-$(GOARCH) $@
+
+$(BUILD_DIR)/$(PROJECT)-%-$(GOARCH): $(GO_FILES) $(BUILD_DIR)
+	GOOS=$* GOARCH=$(GOARCH) go build -tags $(GO_BUILD_TAGS) -o $@ $(BUILD_PACKAGE)
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+.PHONY: cross
+cross: $(foreach platform, $(SUPPORTED_PLATFORMS), out/$(PROJECT)-$(platform))
+
+.PHONY: test
+test: $(BUILD_DIR)/$(PROJECT)
+	./.container-diff-tests.sh
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILD_DIR)
+
+