# Set an output prefix, which is the local directory if not specified
PREFIX?=$(shell pwd)

# Set any default go build tags
BUILDTAGS := seccomp apparmor

GO_LDFLAGS_STATIC=-ldflags "-w -extldflags -static"

all: clean build fmt lint test staticcheck vet ## Runs a clean, build, fmt, lint, test, staticcheck, and vet

.PHONY: build
build: alpine busybox cl-k8s ## Builds a static executable or package

.PHONY: alpine
alpine:
	@echo "+ $@"
	go generate ./examples/$@/...
	CGO_ENABLED=1 go build \
				-tags "$(BUILDTAGS) static_build" \
				${GO_LDFLAGS_STATIC} -o $@ ./examples/$@/...
	@echo "Static container for $@ created at: ./$@"

.PHONY: busybox
busybox:
	@echo "+ $@"
	go generate ./examples/$@/...
	CGO_ENABLED=1 go build \
				-tags "$(BUILDTAGS) static_build" \
				${GO_LDFLAGS_STATIC} -o $@ ./examples/$@/...
	@echo "Static container for $@ created at: ./$@"

.PHONY: cl-k8s
cl-k8s:
	@echo "+ $@"
	go generate ./examples/$@/...
	CGO_ENABLED=1 go build \
				-tags "$(BUILDTAGS) static_build" \
				${GO_LDFLAGS_STATIC} -o $@ ./examples/$@/...
	@echo "Static container for $@ created at: ./$@"

.PHONY: fmt
fmt: ## Verifies all files have men `gofmt`ed
	@echo "+ $@"
	@gofmt -s -l . | grep -v '.pb.go:' | grep -v vendor | grep -v bindata.go | tee /dev/stderr

.PHONY: lint
lint: ## Verifies `golint` passes
	@echo "+ $@"
	@golint ./... | grep -v '.pb.go:' | grep -v vendor | tee /dev/stderr

.PHONY: test
test: ## Runs the go tests
	@echo "+ $@"
	@go test -v -tags "$(BUILDTAGS) cgo" $(shell go list ./... | grep -v vendor)

.PHONY: vet
vet: ## Verifies `go vet` passes
	@echo "+ $@"
	@go vet $(shell go list ./... | grep -v vendor) | grep -v '.pb.go:' | tee /dev/stderr

.PHONY: staticcheck
staticcheck: ## Verifies `staticcheck` passes
	@echo "+ $@"
	@staticcheck $(shell go list ./... | grep -v vendor) | grep -v '.pb.go:' | tee /dev/stderr

.PHONY: cover
cover: ## Runs go test with coverage
	@echo "" > coverage.txt
	@for d in $(shell go list ./... | grep -v vendor); do \
		go test -race -coverprofile=profile.out -covermode=atomic "$$d"; \
		if [ -f profile.out ]; then \
			cat profile.out >> coverage.txt; \
			rm profile.out; \
		fi; \
	done;

.PHONY: bump-version
BUMP := patch
bump-version: ## Bump the version in the version file. Set BUMP to [ patch | major | minor ]
	@go get -u github.com/jessfraz/junk/sembump # update sembump tool
	$(eval NEW_VERSION = $(shell sembump --kind $(BUMP) $(VERSION)))
	@echo "Bumping VERSION.txt from $(VERSION) to $(NEW_VERSION)"
	echo $(NEW_VERSION) > VERSION.txt
	@echo "Updating links to download binaries in README.md"
	sed -i s/$(VERSION)/$(NEW_VERSION)/g README.md
	git add VERSION.txt README.md
	git commit -vsam "Bump version to $(NEW_VERSION)"
	@echo "Run make tag to create and push the tag for new version $(NEW_VERSION)"

.PHONY: tag
tag: ## Create a new git tag to prepare to build a release
	git tag -sa $(VERSION) -m "$(VERSION)"
	@echo "Run git push origin $(VERSION) to push your new tag to GitHub and trigger a travis build."

.PHONY: clean
clean: ## Cleanup any build binaries or packages
	@echo "+ $@"
	$(RM) alpine busybox cl-k8s
	@sudo $(RM) -r rootfs

.PHONY: help
help:
	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'