build: makefile with development commands

Makefile

@@ -0,0 +1,63 @@
+MAKEFILE_DIR = $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
+TESTS_BIN = $(MAKEFILE_DIR)/build/cserver_tests
+
+CXX = clang++
+
+CMAKE_CMD ?= cmake
+CMAKE_BUILD_TYPE ?= Debug
+CMAKE_GENERATOR ?= Ninja
+
+CMAKE_FLAGS += -DCMAKE_CXX_COMPILER=$(CXX) \
+			   -DCMAKE_BUILD_TYPE=$(CMAKE_BUILD_TYPE) \
+			   -DCMAKE_EXPORT_COMPILE_COMMANDS=1 \
+			   -DENABLE_TESTS=1 \
+         -DENABLE_EXAMPLES=1
+
+# Only need to handle Ninja here.
+# Make will inherit the VERBOSE variable, and the -j, -l, and -n flags.
+ifeq ($(CMAKE_GENERATOR),Ninja)
+	BUILD_TOOL = ninja
+	ifneq ($(VERBOSE),)
+		BUILD_TOOL += -v
+	endif
+	BUILD_TOOL += $(shell printf '%s' '$(MAKEFLAGS)' | grep -o -- ' *-[jl][0-9]\+ *')
+	ifeq (n,$(findstring n,$(firstword -$(MAKEFLAGS))))
+		BUILD_TOOL += -n
+	endif
+else
+	BUILD_TOOL = $(MAKE)
+endif
+
+all: $(TESTS_BIN)
+
+build/.ran-cmake:
+	$(CMAKE_CMD) -S . -B build -G $(CMAKE_GENERATOR) $(CMAKE_FLAGS)
+	touch $@
+
+$(TESTS_BIN): build/.ran-cmake FORCE
+	+$(BUILD_TOOL) -C build
+
+cmake:
+	touch CMakeLists.txt
+	$(MAKE) build/.ran-cmake
+
+format:
+	clang-format -Werror -i \
+    $(shell find include -name *.hpp) \
+		$(shell find examples -name *.cpp) \
+		$(shell find tests -name *.cpp)
+
+clean:
+	+test -d build && $(BUILD_TOOL) -C build clean || true
+
+distclean:
+	rm -rf build
+
+# Test
+
+test: $(TESTS_BIN)
+	$(TESTS_BIN)
+
+FORCE: ;
+
+.PHONY: all cmake test format clean distclean