# A Self-Documenting Makefile: http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html

OS = $(shell uname)

# Build variables
BUILD_DIR ?= build
export CGO_ENABLED ?= 0
export GOOS = $(shell go env GOOS)
ifeq (${VERBOSE}, 1)
ifeq ($(filter -v,${GOARGS}),)
	GOARGS += -v
endif
TEST_FORMAT = short-verbose
endif

GOTESTSUM_VERSION = 0.3.3
GOLANGCI_VERSION = 1.15.0

# Add the ability to override some variables
# Use with care
-include override.mk

.PHONY: clear
clear: ## Clear the working area and the project
	rm -rf bin/

.PHONY: check
check: test lint ## Run tests and linters

bin/gotestsum: bin/gotestsum-${GOTESTSUM_VERSION}
	@ln -sf gotestsum-${GOTESTSUM_VERSION} bin/gotestsum
bin/gotestsum-${GOTESTSUM_VERSION}:
	@mkdir -p bin
ifeq (${OS}, Darwin)
	curl -L https://github.com/gotestyourself/gotestsum/releases/download/v${GOTESTSUM_VERSION}/gotestsum_${GOTESTSUM_VERSION}_darwin_amd64.tar.gz | tar -zOxf - gotestsum > ./bin/gotestsum-${GOTESTSUM_VERSION} && chmod +x ./bin/gotestsum-${GOTESTSUM_VERSION}
endif
ifeq (${OS}, Linux)
	curl -L https://github.com/gotestyourself/gotestsum/releases/download/v${GOTESTSUM_VERSION}/gotestsum_${GOTESTSUM_VERSION}_linux_amd64.tar.gz | tar -zOxf - gotestsum > ./bin/gotestsum-${GOTESTSUM_VERSION} && chmod +x ./bin/gotestsum-${GOTESTSUM_VERSION}
endif

TEST_PKGS ?= ./...
TEST_REPORT_NAME ?= results.xml
.PHONY: test
test: TEST_REPORT ?= main
test: TEST_FORMAT ?= short
test: SHELL = /bin/bash
test: bin/gotestsum ## Run tests
	@mkdir -p ${BUILD_DIR}/test_results/${TEST_REPORT}
	bin/gotestsum --no-summary=skipped --junitfile ${BUILD_DIR}/test_results/${TEST_REPORT}/${TEST_REPORT_NAME} --format ${TEST_FORMAT} -- $(filter-out -v,${GOARGS}) $(if ${TEST_PKGS},${TEST_PKGS},./...)

bin/golangci-lint: bin/golangci-lint-${GOLANGCI_VERSION}
	@ln -sf golangci-lint-${GOLANGCI_VERSION} bin/golangci-lint
bin/golangci-lint-${GOLANGCI_VERSION}:
	@mkdir -p bin
	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b ./bin/ v${GOLANGCI_VERSION}
	@mv bin/golangci-lint $@

.PHONY: lint
lint: bin/golangci-lint ## Run linter
	bin/golangci-lint run

release-%: TAG_PREFIX = v
release-%:
ifneq (${DRY}, 1)
	@sed -e "s/^## \[Unreleased\]$$/## [Unreleased]\\"$$'\n'"\\"$$'\n'"\\"$$'\n'"## [$*] - $$(date +%Y-%m-%d)/g; s|^\[Unreleased\]: \(.*\/compare\/\)\(.*\)...HEAD$$|[Unreleased]: \1${TAG_PREFIX}$*...HEAD\\"$$'\n'"[$*]: \1\2...${TAG_PREFIX}$*|g" CHANGELOG.md > CHANGELOG.md.new
	@mv CHANGELOG.md.new CHANGELOG.md

ifeq (${TAG}, 1)
	git add CHANGELOG.md
	git commit -m 'Prepare release $*'
	git tag -m 'Release $*' ${TAG_PREFIX}$*
ifeq (${PUSH}, 1)
	git push; git push origin ${TAG_PREFIX}$*
endif
endif
endif

	@echo "Version updated to $*!"
ifneq (${PUSH}, 1)
	@echo
	@echo "Review the changes made by this script then execute the following:"
ifneq (${TAG}, 1)
	@echo
	@echo "git add CHANGELOG.md && git commit -m 'Prepare release $*' && git tag -m 'Release $*' ${TAG_PREFIX}$*"
	@echo
	@echo "Finally, push the changes:"
endif
	@echo
	@echo "git push; git push origin ${TAG_PREFIX}$*"
endif

.PHONY: patch
patch: ## Release a new patch version
	@${MAKE} release-$(shell (git describe --abbrev=0 --tags 2> /dev/null || echo "0.0.0") | sed 's/^v//' | awk -F'[ .]' '{print $$1"."$$2"."$$3+1}')

.PHONY: minor
minor: ## Release a new minor version
	@${MAKE} release-$(shell (git describe --abbrev=0 --tags 2> /dev/null || echo "0.0.0") | sed 's/^v//' | awk -F'[ .]' '{print $$1"."$$2+1".0"}')

.PHONY: major
major: ## Release a new major version
	@${MAKE} release-$(shell (git describe --abbrev=0 --tags 2> /dev/null || echo "0.0.0") | sed 's/^v//' | awk -F'[ .]' '{print $$1+1".0.0"}')

.PHONY: list
list: ## List all make targets
	@${MAKE} -pRrn : -f $(MAKEFILE_LIST) 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | sort

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

# Variable outputting/exporting rules
var-%: ; @echo $($*)
varexport-%: ; @echo $*=$($*)