Added make commands to create artifacts and upload them to a github r…

…elease

Makefile

@@ -30,3 +30,46 @@ cover:
 	go test -race -coverprofile=coverage.txt
 	go tool cover -html=coverage.txt
 	rm coverage.txt
+
+ARTIFACT_DIR := _artifacts
+
+# To upload artifacts for the current version;
+# execute: make upload
+#
+# Check https://github.com/tcnksm/ghr for usage of ghr
+upload: artifacts
+	ghr -replace $(VERS) $(ARTIFACT_DIR)
+
+# To build artifacts for the current version;
+# execute: make artifacts
+# 
+# Supported OS - Platform combinations:
+# darwin - amd64
+# linux  - amd64
+artifacts: _artifacts_clean _artifacts_darwin_amd64 _artifacts_linux_amd64
+
+_artifacts_clean:
+	rm -rf $(ARTIFACT_DIR)
+	mkdir $(ARTIFACT_DIR)
+
+_artifacts_darwin_amd64: GOOS := darwin
+_artifacts_darwin_amd64: GOARCH := amd64
+_artifacts_darwin_amd64: DIR := godog-$(VERS)-$(GOOS)-$(GOARCH)
+_artifacts_darwin_amd64: 
+	mkdir $(ARTIFACT_DIR)/$(DIR)
+	env GOOS=$(GOOS) GOARCH=$(GOARCH) go build -o $(ARTIFACT_DIR)/$(DIR)/godog ./cmd/godog
+	cp README.md $(ARTIFACT_DIR)/$(DIR)/README.md
+	cp LICENSE $(ARTIFACT_DIR)/$(DIR)/LICENSE
+	cd $(ARTIFACT_DIR) && tar -c --use-compress-program="pigz --fast" -f $(DIR).tar.gz $(DIR) && cd ..
+	rm -rf $(ARTIFACT_DIR)/$(DIR)
+
+_artifacts_linux_amd64: GOOS := linux
+_artifacts_linux_amd64: GOARCH := amd64
+_artifacts_linux_amd64: DIR := godog-$(VERS)-$(GOOS)-$(GOARCH)
+_artifacts_linux_amd64:
+	mkdir $(ARTIFACT_DIR)/$(DIR)
+	env GOOS=$(GOOS) GOARCH=$(GOARCH) go build -o $(ARTIFACT_DIR)/$(DIR)/godog ./cmd/godog
+	cp README.md $(ARTIFACT_DIR)/$(DIR)/README.md
+	cp LICENSE $(ARTIFACT_DIR)/$(DIR)/LICENSE
+	cd $(ARTIFACT_DIR) && tar -c --use-compress-program="pigz --fast" -f $(DIR).tar.gz $(DIR) && cd ..
+	rm -rf $(ARTIFACT_DIR)/$(DIR)