feat: add makefile

Makefile

@@ -0,0 +1,40 @@
+# Multi-platform binary build
+# http://www.codershaven.com/multi-platform-makefile-for-go/
+.PHONY: all test clean
+
+EXECUTABLE=aws-mfa-assume-credential-process
+BIN_FOLDER="bin"
+WINDOWS=$(BIN_FOLDER)/$(EXECUTABLE)-windows-amd64.exe
+LINUX=$(BIN_FOLDER)/$(EXECUTABLE)-linux-amd64
+DARWIN=$(BIN_FOLDER)/$(EXECUTABLE)-darwin-amd64
+VERSION=$(shell git describe --tags --always --long --dirty)
+
+windows: $(WINDOWS) ## Build for Windows
+
+linux: $(LINUX) ## Build for Linux
+
+darwin: $(DARWIN) ## Build for Darwin (macOS)
+
+$(WINDOWS):
+	env GOOS=windows GOARCH=amd64 go build -i -v -o $(WINDOWS) -ldflags="-s -w -X main.version=$(VERSION)"  ./cmd/main.go
+
+$(LINUX):
+	env GOOS=linux GOARCH=amd64 go build -i -v -o $(LINUX) -ldflags="-s -w -X main.version=$(VERSION)"  ./cmd/main.go
+
+$(DARWIN):
+	env GOOS=darwin GOARCH=amd64 go build -i -v -o $(DARWIN) -ldflags="-s -w -X main.version=$(VERSION)"  ./cmd/main.go
+
+build: windows linux darwin ## Build binaries
+	@echo version: $(VERSION)
+
+all: test build ## Build and run tests
+
+test: clean ## Run unit tests
+	@(go test ./...)
+
+clean: ## Remove previous build
+	@(go clean)
+	rm -f $(WINDOWS) $(LINUX) $(DARWIN)
+
+help: ## Display available commands
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'