Add Makefile for common tasks

Makefile

@@ -0,0 +1,36 @@
+version:
+	test -n "$(VERSION)"  # $$VERSION must be set.
+
+github-token:
+	test -n "$(GITHUB_TOKEN)" # $$GITHUB_TOKEN must be set.
+
+fetch:
+	go get \
+	github.com/mitchellh/gox \
+	github.com/aktau/github-release
+
+clean:
+	rm -rf ./release
+
+build: version
+	gox -verbose \
+	-osarch="windows/amd64 linux/amd64 darwin/amd64" \
+	-output="release/{{.Dir}}-${VERSION}-{{.OS}}-{{.Arch}}" .
+
+test:
+	go clean -testcache
+	go test ./...
+
+publish: version github-token clean test build
+	github-release release --user yamaszone --repo gcp-secret-manager-buddy --tag ${VERSION} \
+	--name "${VERSION}" --description "${VERSION}" && \
+	github-release upload --user yamaszone --repo gcp-secret-manager-buddy --tag ${VERSION} \
+	--name "gcp-secret-manager-buddy-${VERSION}-windows-amd64.exe" --file release/gcp-secret-manager-buddy-${VERSION}-windows-amd64.exe; \
+	github-release upload --user yamaszone --repo gcp-secret-manager-buddy --tag ${VERSION} \
+	--name "gcp-secret-manager-buddy-${VERSION}-windows-amd64.exe.asc" --file release/gcp-secret-manager-buddy-${VERSION}-windows-amd64.exe.asc; \
+	for qualifier in darwin-amd64 linux-amd64 ; do \
+		github-release upload --user yamaszone --repo gcp-secret-manager-buddy --tag ${VERSION} \
+		--name "gcp-secret-manager-buddy-${VERSION}-$$qualifier" --file release/gcp-secret-manager-buddy-${VERSION}-$$qualifier; \
+		github-release upload --user yamaszone --repo gcp-secret-manager-buddy --tag ${VERSION} \
+		--name "gcp-secret-manager-buddy-${VERSION}-$$qualifier.asc" --file release/gcp-secret-manager-buddy-${VERSION}-$$qualifier.asc; \
+	done