export GOBIN ?= $(shell pwd)/bin

GOLINT = $(GOBIN)/golint
BENCH_FLAGS ?= -cpuprofile=cpu.pprof -memprofile=mem.pprof -benchmem

# Directories containing independent Go modules.
#
# We track coverage only for the main module.
MODULE_DIRS = .

# Many Go tools take file globs or directories as arguments instead of packages.
GO_FILES := $(shell \
	find . '(' -path '*/.*' -o -path './vendor' ')' -prune \
	-o -name '*.go' -print | cut -b3-)

.PHONY: all
all: lint test

.PHONY: lint
lint: $(GOLINT)
	@rm -rf lint.log
	@echo "Checking formatting..."
	@gofmt -d -s $(GO_FILES) 2>&1 | tee lint.log
	@echo "Checking vet..."
	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go vet ./... 2>&1) &&) true | tee -a lint.log
	@echo "Checking lint..."
	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && $(GOLINT) ./... 2>&1) &&) true | tee -a lint.log
	@echo "Checking for unresolved FIXMEs..."
	@git grep -i fixme | grep -v -e Makefile | tee -a lint.log
	@echo "Checking for license headers..."
	@./checklicense.sh | tee -a lint.log
	@[ ! -s lint.log ]

$(GOLINT):
	go install golang.org/x/lint/golint

.PHONY: test
test:
	@$(foreach dir,$(MODULE_DIRS),(cd $(dir) && go test -race ./...) &&) true

.PHONY: cover
cover:
	go test -race -coverprofile=cover.out -coverpkg=./... ./...
	go tool cover -html=cover.out -o cover.html

.PHONY: bench
BENCH ?= .
bench:
	@$(foreach dir,$(MODULE_DIRS), ( \
		cd $(dir) && \
		go list ./... | xargs -n1 go test -bench=$(BENCH) -run="^$$" $(BENCH_FLAGS) \
	) &&) true