TEMPDIR = ./.tmp

# commands and versions
LINTCMD = $(TEMPDIR)/golangci-lint run --tests=false --timeout=5m --config .golangci.yaml
GOIMPORTS_CMD = $(TEMPDIR)/gosimports -local github.com/anchore

# tool versions
GOLANGCILINT_VERSION = v1.50.1
GOSIMPORTS_VERSION = v0.3.4
BOUNCER_VERSION = v0.4.0

# formatting variables
BOLD := $(shell tput -T linux bold)
PURPLE := $(shell tput -T linux setaf 5)
GREEN := $(shell tput -T linux setaf 2)
CYAN := $(shell tput -T linux setaf 6)
RED := $(shell tput -T linux setaf 1)
RESET := $(shell tput -T linux sgr0)
TITLE := $(BOLD)$(PURPLE)
SUCCESS := $(BOLD)$(GREEN)

# test variables
RESULTSDIR = test/results
COVER_REPORT = $(RESULTSDIR)/unit-coverage-details.txt
COVER_TOTAL = $(RESULTSDIR)/unit-coverage-summary.txt
# the quality gate lower threshold for unit test total % coverage (by function statements)
COVERAGE_THRESHOLD := 80

$(RESULTSDIR):
	mkdir -p $(RESULTSDIR)

$(TEMPDIR):
	mkdir -p $(TEMPDIR)

.PHONY: bootstrap-tools
bootstrap-tools: $(TEMPDIR)
	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(TEMPDIR)/ $(GOLANGCILINT_VERSION)
	curl -sSfL https://raw.githubusercontent.com/wagoodman/go-bouncer/master/bouncer.sh | sh -s -- -b $(TEMPDIR)/ $(BOUNCER_VERSION)
	# the only difference between goimports and gosimports is that gosimports removes extra whitespace between import blocks (see https://github.com/golang/go/issues/20818)
	GOBIN="$(realpath $(TEMPDIR))" go install github.com/rinchsan/gosimports/cmd/gosimports@$(GOSIMPORTS_VERSION)

.PHONY: static-analysis
static-analysis: check-licenses lint

.PHONY: lint
lint: ## Run gofmt + golangci lint checks
	$(call title,Running linters)
	# ensure there are no go fmt differences
	@printf "files with gofmt issues: [$(shell gofmt -l -s .)]\n"
	@test -z "$(shell gofmt -l -s .)"

	# run all golangci-lint rules
	$(LINTCMD)
	@[ -z "$(shell $(GOIMPORTS_CMD) -d .)" ] || (echo "goimports needs to be fixed" && false)

	# go tooling does not play well with certain filename characters, ensure the common cases don't result in future "go get" failures
	$(eval MALFORMED_FILENAMES := $(shell find . | grep -e ':'))
	@bash -c "[[ '$(MALFORMED_FILENAMES)' == '' ]] || (printf '\nfound unsupported filename characters:\n$(MALFORMED_FILENAMES)\n\n' && false)"

.PHONY: lint-fix
lint-fix: ## Auto-format all source code + run golangci lint fixers
	$(call title,Running lint fixers)
	gofmt -w -s .
	$(GOIMPORTS_CMD) -w .
	$(LINTCMD) --fix
	go mod tidy

.PHONY: check-licenses
check-licenses: ## Ensure transitive dependencies are compliant with the current license policy
	$(TEMPDIR)/bouncer check ./...

.PHONY: unit
unit: $(RESULTSDIR) ## Run unit tests (with coverage)
	$(call title,Running unit tests)
	go test  -coverprofile $(COVER_REPORT) $(shell go list ./... | grep -v anchore/syft/test)
	@go tool cover -func $(COVER_REPORT) | grep total |  awk '{print substr($$3, 1, length($$3)-1)}' > $(COVER_TOTAL)
	@echo "Coverage: $$(cat $(COVER_TOTAL))"
	@if [ $$(echo "$$(cat $(COVER_TOTAL)) >= $(COVERAGE_THRESHOLD)" | bc -l) -ne 1 ]; then echo "$(RED)$(BOLD)Failed coverage quality gate (> $(COVERAGE_THRESHOLD)%)$(RESET)" && false; fi

.PHONY: test
test: unit
