lint.mk

# BEGIN: lint-install -makefile lint.mk .
# http://github.com/tinkerbell/lint-install

.PHONY: lint
lint: _lint

LINT_ARCH := $(shell uname -m)
LINT_OS := $(shell uname)
LINT_OS_LOWER := $(shell echo $(LINT_OS) | tr '[:upper:]' '[:lower:]')
LINT_ROOT := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))

# shellcheck and hadolint lack arm64 native binaries: rely on x86-64 emulation
ifeq ($(LINT_OS),Darwin)
	ifeq ($(LINT_ARCH),arm64)
		LINT_ARCH=x86_64
	endif
endif

LINTERS :=
FIXERS :=

SHELLCHECK_VERSION ?= v0.8.0
SHELLCHECK_BIN := out/linters/shellcheck-$(SHELLCHECK_VERSION)-$(LINT_ARCH)
$(SHELLCHECK_BIN):
	mkdir -p out/linters
	rm -rf out/linters/shellcheck-*
	curl -sSfL https://github.com/koalaman/shellcheck/releases/download/$(SHELLCHECK_VERSION)/shellcheck-$(SHELLCHECK_VERSION).$(LINT_OS_LOWER).$(LINT_ARCH).tar.xz | tar -C out/linters -xJf -
	mv out/linters/shellcheck-$(SHELLCHECK_VERSION)/shellcheck $@
	rm -rf out/linters/shellcheck-$(SHELLCHECK_VERSION)/shellcheck

LINTERS += shellcheck-lint
shellcheck-lint: $(SHELLCHECK_BIN)
	$(SHELLCHECK_BIN) $(shell find . -name "*.sh")

FIXERS += shellcheck-fix
shellcheck-fix: $(SHELLCHECK_BIN)
	$(SHELLCHECK_BIN) $(shell find . -name "*.sh") -f diff | { read -t 1 line || exit 0; { echo "$$line" && cat; } | git apply -p2; }

GOLANGCI_LINT_CONFIG := $(LINT_ROOT)/.golangci.yml
GOLANGCI_LINT_VERSION ?= v1.43.0
GOLANGCI_LINT_BIN := out/linters/golangci-lint-$(GOLANGCI_LINT_VERSION)-$(LINT_ARCH)
$(GOLANGCI_LINT_BIN):
	mkdir -p out/linters
	rm -rf out/linters/golangci-lint-*
	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b out/linters $(GOLANGCI_LINT_VERSION)
	mv out/linters/golangci-lint $@

LINTERS += golangci-lint-lint
golangci-lint-lint: $(GOLANGCI_LINT_BIN)
	find . -name go.mod -execdir "$(GOLANGCI_LINT_BIN)" run -c "$(GOLINT_CONFIG)" \;

FIXERS += golangci-lint-fix
golangci-lint-fix: $(GOLANGCI_LINT_BIN)
	find . -name go.mod -execdir "$(GOLANGCI_LINT_BIN)" run -c "$(GOLINT_CONFIG)" --fix \;

YAMLLINT_VERSION ?= 1.26.3
YAMLLINT_ROOT := out/linters/yamllint-$(YAMLLINT_VERSION)
YAMLLINT_BIN := $(YAMLLINT_ROOT)/dist/bin/yamllint
$(YAMLLINT_BIN):
	mkdir -p out/linters
	rm -rf out/linters/yamllint-*
	curl -sSfL https://github.com/adrienverge/yamllint/archive/refs/tags/v$(YAMLLINT_VERSION).tar.gz | tar -C out/linters -zxf -
	cd $(YAMLLINT_ROOT) && pip3 install --target dist .

LINTERS += yamllint-lint
yamllint-lint: $(YAMLLINT_BIN)
	PYTHONPATH=$(YAMLLINT_ROOT)/dist $(YAMLLINT_ROOT)/dist/bin/yamllint .

.PHONY: _lint $(LINTERS)
_lint: $(LINTERS)

.PHONY: fix $(FIXERS)
fix: $(FIXERS)

# END: lint-install -makefile lint.mk .