adds make build infra

Author: Sameer Naik

Makefile

@@ -0,0 +1,85 @@
+PACKAGE            = aws-custom-runtime
+PACKAGE_DESC       = Triggermesh AWS Lambda Custom Runtime
+
+TARGETS           ?= linux/amd64
+
+BASE_DIR          ?= $(CURDIR)
+
+OUTPUT_DIR        ?= $(BASE_DIR)/_output
+
+BIN_OUTPUT_DIR    ?= $(OUTPUT_DIR)
+TEST_OUTPUT_DIR   ?= $(OUTPUT_DIR)
+COVER_OUTPUT_DIR  ?= $(OUTPUT_DIR)
+DIST_DIR          ?= $(OUTPUT_DIR)
+
+GO                ?= go
+GOFMT             ?= gofmt
+GOLINT            ?= golangci-lint run
+GOTOOL            ?= go tool
+GOTEST            ?= gotestsum --junitfile $(TEST_OUTPUT_DIR)/$(PACKAGE)-unit-tests.xml --format pkgname-and-test-fails --
+
+GOPKGS             = ./pkg/events/...
+LDFLAGS            = -extldflags=-static -w -s
+
+HAS_GOTESTSUM     := $(shell command -v gotestsum;)
+HAS_GOLANGCI_LINT := $(shell command -v golangci-lint;)
+
+.PHONY: help build install release test coverage lint fmt fmt-test clean
+
+all: build
+
+install-gotestsum:
+ifndef HAS_GOTESTSUM
+	curl -SL https://github.com/gotestyourself/gotestsum/releases/download/v0.4.2/gotestsum_0.4.2_linux_amd64.tar.gz | tar -C $(shell go env GOPATH)/bin -zxf -
+endif
+
+install-golangci-lint:
+ifndef HAS_GOLANGCI_LINT
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.26.0
+endif
+
+help: ## Display this help
+	@awk 'BEGIN {FS = ":.*?## "; printf "\n$(PACKAGE_DESC)\nUsage:\n  make \033[36m<source>\033[0m\n"} /^[a-zA-Z0-9._-]+:.*?## / {printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+
+build: ## Build the binary
+	$(GO) build -ldflags "$(LDFLAGS)" -o $(BIN_OUTPUT_DIR)/$(PACKAGE)
+
+test: install-gotestsum ## Run unit tests
+	@mkdir -p $(TEST_OUTPUT_DIR)
+	$(GOTEST) -p=1 -race -cover -coverprofile=$(TEST_OUTPUT_DIR)/$(PACKAGE)-c.out $(GOPKGS)
+
+cover: test ## Generate code coverage
+	@mkdir -p $(COVER_OUTPUT_DIR)
+	$(GOTOOL) cover -html=$(TEST_OUTPUT_DIR)/$(PACKAGE)-c.out -o $(COVER_OUTPUT_DIR)/$(PACKAGE)-coverage.html
+
+lint: install-golangci-lint ## Lint source files
+	$(GOLINT) $(GOPKGS)
+
+fmt: ## Format source files
+	$(GOFMT) -s -w $(shell $(GO) list -f '{{$$d := .Dir}}{{range .GoFiles}}{{$$d}}/{{.}} {{end}} {{$$d := .Dir}}{{range .TestGoFiles}}{{$$d}}/{{.}} {{end}}' $(GOPKGS))
+
+fmt-test: ## Check source formatting
+	@test -z $(shell $(GOFMT) -l $(shell $(GO) list -f '{{$$d := .Dir}}{{range .GoFiles}}{{$$d}}/{{.}} {{end}} {{$$d := .Dir}}{{range .TestGoFiles}}{{$$d}}/{{.}} {{end}}' $(GOPKGS)))
+
+release: ## Build release binaries
+	@set -e ; \
+	for platform in $(TARGETS); do \
+		GOOS=$${platform%/*} ; \
+		GOARCH=$${platform#*/} ; \
+		RELEASE_BINARY=$(PACKAGE)-$${GOOS}-$${GOARCH} ; \
+		[ $${GOOS} = "windows" ] && RELEASE_BINARY=$${RELEASE_BINARY}.exe ; \
+		echo "GOOS=$${GOOS} GOARCH=$${GOARCH} $(GO) build -ldflags "$(LDFLAGS)" -o $(DIST_DIR)/$${RELEASE_BINARY}" . ; \
+		GOOS=$${GOOS} GOARCH=$${GOARCH} $(GO) build -ldflags "$(LDFLAGS)" -o $(DIST_DIR)/$${RELEASE_BINARY} . ; \
+	done
+
+clean: ## Clean build artifacts
+	@for platform in $(TARGETS); do \
+		GOOS=$${platform%/*} ; \
+		GOARCH=$${platform#*/} ; \
+		RELEASE_BINARY=$(PACKAGE)-$${GOOS}-$${GOARCH} ; \
+		[ $${GOOS} = "windows" ] && RELEASE_BINARY=$${RELEASE_BINARY}.exe ; \
+		$(RM) -v $(DIST_DIR)/$${RELEASE_BINARY}; \
+	done
+	@$(RM) -v $(BIN_OUTPUT_DIR)/$(PACKAGE)
+	@$(RM) -v $(TEST_OUTPUT_DIR)/$(PACKAGE)-c.out $(TEST_OUTPUT_DIR)/$(PACKAGE)-unit-tests.xml
+	@$(RM) -v $(COVER_OUTPUT_DIR)/$(PACKAGE)-coverage.html