SHELL = bash

# https://stackoverflow.com/a/39124162/194894
word-dot = $(word $2,$(subst ., ,$1))

MESON_VERSION=$(shell meson --version)
MESON_MAJOR_VERSION=$(call word-dot, $(MESON_VERSION), 1)
MESON_MINOR_VERSION=$(call word-dot, $(MESON_VERSION), 2)

.PHONY: all build check check-format clean distclean\
	doc release debug stresstest test

all: build

export BUILDTYPE ?= debugoptimized
export BUILDDIR = build-$(BUILDTYPE)

NPROC := $(shell nproc)
JOBS := $(shell echo $$(( $(NPROC) + 6)))
LOAD := $(shell echo $$(( $(NPROC) * 2)))

NINJA_BIN ?= ninja
NINJA := $(NINJA_BIN) -j $(JOBS) -l $(LOAD) $(EXTRA_NINJA_ARGS)

build:
	[[ -L build ]] || ./tools/prepare-build-dir
	$(NINJA) -C $@

release:
	rm -f build
	$(MAKE) build BUILDTYPE=$@

debug:
	rm -f build
	$(MAKE) build BUILDTYPE=$@

STATIC_ANALYSIS_NINJA_TARGETS += iwyu

# Meson >= 0.52 will automatically generate a clang-tidy target if a
# .clang-tidy file is found.
# Source version check: https://stackoverflow.com/a/3732456/194894
ifeq ($(shell [ $(MESON_MINOR_VERSION) -ge 52 ] && echo true), true)
STATIC_ANALYSIS_NINJA_TARGETS += clang-tidy
else
$(warning old mesion version $(MESON_VERSION) detected, meson >= 0.52 required for clang-tidy)
endif

.PHONY: fast-static-analysis
fast-static-analysis: all check-format check-license doc

.PHONY: static-analysis
static-analysis: fast-static-analysis
	$(NINJA) -C build $(STATIC_ANALYSIS_NINJA_TARGETS)

.PHONY: smoke-test-suite
smoke-test-suite: all
	cd build && meson test --suite smoke

.PHONY: smoke-test
smoke-test: smoke-test-suite static-analysis

TEST_NINJA_TARGETS += test

doc: all
	$(NINJA) -C build doc/html

check: smoke-test test

test: all
	$(NINJA) -C build $(TEST_NINJA_TARGETS)

clean:
	rm -f build
	rm -rf build-*

distclean: clean
	git clean -x -d -f

check-format:
	./tools/check-format

.PHONY: check-license
check-license:
	./tools/check-license

.PHONY: format
format: all
	$(NINJA) -C build clang-format

.PHONY: tidy
tidy: all
	$(NINJA) -C build clang-tidy

PHONY: iwyu
iwyu: all
	$(NINJA) -C build $@

PHONY: fix-includes
fix-includes: all
	./tools/fix-includes

stresstest: test
	./stresstest/stresstest.sh build/tests/simplest_fib_test

# TODO: Determine how we can run also jobs from the 'test' stage,
# e.g. test-gcc.
.PHONY: gitlab-runner
gitlab-runner:
	gitlab-runner exec docker smoke-test