Makefile

LUA ?= lua5.1
LUA_VERSION = $(shell $(LUA) -e 'print(_VERSION:match("%d%.%d"))')
LUAROCKS = luarocks --lua-version=$(LUA_VERSION)
LUA_PATH_MAKE = $(shell $(LUAROCKS) path --lr-path);./?.lua;./?/init.lua
LUA_CPATH_MAKE = $(shell $(LUAROCKS) path --lr-cpath);./?.so

LUA_SRC_VERSION ?= 5.1.5
LPEG_VERSION ?= 1.0.2
LFS_VERSION ?= 1_8_0

.PHONY: test local build watch lint count show test_binary generate clean

clean:
	rm -f moonscript/parse/native.so moonscript/parse/native.o
	rm -rf dist

# regenerate the parser from the pgen grammar (requires the pgen to be installed)
generate: build
	pgen moonscript/parse/grammar.lua -n moonscript_parse_native \
		-o moonscript/parse/native.c --vendor-errors moonscript/parse/errors.lua
	clang-format -style="{ColumnLimit: 0}" -i moonscript/parse/native.c
	pgen moonscript/parse/grammar.lua -n moonscript_parse_slow \
		-o moonscript/parse/slow.lua

moonscript/parse/native.so: moonscript/parse/native.c
	gcc -shared -o $@ -O3 -fPIC $< `pkg-config --cflags --libs lua5.1`

build:
	LUA_PATH='$(LUA_PATH_MAKE)' LUA_CPATH='$(LUA_CPATH_MAKE)' $(LUA) bin/moonc moon/ moonscript/
	echo "#!/usr/bin/env lua" > bin/moon
	$(LUA) bin/moonc -p bin/moon.moon >> bin/moon
	echo "-- vim: set filetype=lua:" >> bin/moon


# This will rebuild MoonScript from the (hopefully working) system installation of moonc
build_from_system:
	moonc moon/ moonscript/
	echo "#!/usr/bin/env lua" > bin/moon
	moonc -p bin/moon.moon >> bin/moon
	echo "-- vim: set filetype=lua:" >> bin/moon

show:
	# LUA $(LUA)
	# LUA_VERSION $(LUA_VERSION)
	# LUAROCKS $(LUAROCKS)
	# LUA_PATH_MAKE $(LUA_PATH_MAKE)
	# LUA_CPATH_MAKE $(LUA_CPATH_MAKE)

test: build moonscript/parse/native.so
	LUA_PATH='$(LUA_PATH_MAKE)' LUA_CPATH='./?.so;$(LUA_CPATH_MAKE)' busted
	LUA_PATH='$(LUA_PATH_MAKE)' LUA_CPATH='$(LUA_CPATH_MAKE)' busted --helper=spec/use_slow_parser.moon

build_test_outputs: build
	BUILD=1 busted spec/lang_spec.moon

local: build
	LUA_PATH='$(LUA_PATH_MAKE)' LUA_CPATH='$(LUA_CPATH_MAKE)' $(LUAROCKS) make --local moonscript-dev-1.rockspec

watch:
	moonc moon/ moonscript/ && moonc -w moon/ moonscript/

lint:
	moonc -l moonscript moon bin

count:
	wc -l $$(git ls-files | grep 'moon$$') | sort -n | tail

# Binary build targets for local verification (Linux only)
lua_modules:
	luarocks install argparse --tree=lua_modules

lua-$(LUA_SRC_VERSION)/src/liblua.a:
	curl -L -O https://www.lua.org/ftp/lua-$(LUA_SRC_VERSION).tar.gz
	tar -xzf lua-$(LUA_SRC_VERSION).tar.gz
	cd lua-$(LUA_SRC_VERSION)/src && make liblua.a MYCFLAGS=-DLUA_USE_POSIX

# luac must come from the same tree as liblua.a: 5.1 bytecode embeds
# endianness and type sizes, so it has to match the linked VM
lua-$(LUA_SRC_VERSION)/src/luac: lua-$(LUA_SRC_VERSION)/src/liblua.a
	cd lua-$(LUA_SRC_VERSION)/src && make luac MYCFLAGS=-DLUA_USE_POSIX

lpeg-$(LPEG_VERSION)/lptree.c:
	curl -L -o lpeg.tar.gz https://www.inf.puc-rio.br/~roberto/lpeg/lpeg-$(LPEG_VERSION).tar.gz
	tar -xzf lpeg.tar.gz

luafilesystem-$(LFS_VERSION)/src/lfs.c:
	curl -L -o luafilesystem.tar.gz https://github.com/keplerproject/luafilesystem/archive/v$(LFS_VERSION).tar.gz
	tar -xzf luafilesystem.tar.gz

# Embedded scripts are precompiled to bytecode to skip parsing at startup.
# Unstripped so tracebacks keep line numbers.
bin/binaries/moonscript.h: moonscript/*.lua moon/*.lua lua-$(LUA_SRC_VERSION)/src/luac
	bin/splat.moon -x moonscript.parse.slow -x moonscript.parse.grammar moonscript moon > moonscript.lua
	lua-$(LUA_SRC_VERSION)/src/luac -o moonscript.luac moonscript.lua
	xxd -i -n moonscript_lua moonscript.luac > $@
	rm moonscript.lua moonscript.luac

bin/binaries/moon.h: bin/moon lua-$(LUA_SRC_VERSION)/src/luac
	awk 'FNR>1' bin/moon > moon.lua
	lua-$(LUA_SRC_VERSION)/src/luac -o moon.luac moon.lua
	xxd -i -n moon_lua moon.luac > $@
	rm moon.lua moon.luac

bin/binaries/argparse.h: lua_modules lua-$(LUA_SRC_VERSION)/src/luac
	bin/splat.moon --strip-prefix -l argparse $$(find lua_modules/share/lua -name "argparse.lua" -exec dirname {} \; | head -1) > bin/binaries/argparse.lua
	lua-$(LUA_SRC_VERSION)/src/luac -o argparse.luac bin/binaries/argparse.lua
	xxd -i -n argparse_lua argparse.luac > $@
	rm argparse.luac

bin/binaries/moonc.h: bin/moonc lua-$(LUA_SRC_VERSION)/src/luac
	awk 'FNR>1' bin/moonc > moonc.lua
	lua-$(LUA_SRC_VERSION)/src/luac -o moonc.luac moonc.lua
	xxd -i -n moonc_lua moonc.luac > $@
	rm moonc.lua moonc.luac

dist/moon: lua-$(LUA_SRC_VERSION)/src/liblua.a lpeg-$(LPEG_VERSION)/lptree.c bin/binaries/moonscript.h bin/binaries/moon.h bin/binaries/argparse.h bin/binaries/moon.c bin/binaries/moonscript.c
	mkdir -p dist
	gcc -static -o dist/moon \
		-Ilua-$(LUA_SRC_VERSION)/src/ \
		-Ilpeg-$(LPEG_VERSION)/ \
		-Ibin/binaries/ \
		bin/binaries/moon.c \
		bin/binaries/moonscript.c \
		moonscript/parse/native.c \
		lpeg-$(LPEG_VERSION)/lpvm.c \
		lpeg-$(LPEG_VERSION)/lpcap.c \
		lpeg-$(LPEG_VERSION)/lptree.c \
		lpeg-$(LPEG_VERSION)/lpcode.c \
		lpeg-$(LPEG_VERSION)/lpprint.c \
		lua-$(LUA_SRC_VERSION)/src/liblua.a \
		-lm -ldl

dist/moonc: lua-$(LUA_SRC_VERSION)/src/liblua.a lpeg-$(LPEG_VERSION)/lptree.c luafilesystem-$(LFS_VERSION)/src/lfs.c bin/binaries/moonscript.h bin/binaries/moonc.h bin/binaries/argparse.h bin/binaries/moonc.c bin/binaries/moonscript.c
	mkdir -p dist
	gcc -static -o dist/moonc \
		-Ilua-$(LUA_SRC_VERSION)/src/ \
		-Ilpeg-$(LPEG_VERSION)/ \
		-Ibin/binaries/ \
		bin/binaries/moonc.c \
		bin/binaries/moonscript.c \
		moonscript/parse/native.c \
		lpeg-$(LPEG_VERSION)/lpvm.c \
		lpeg-$(LPEG_VERSION)/lpcap.c \
		lpeg-$(LPEG_VERSION)/lptree.c \
		lpeg-$(LPEG_VERSION)/lpcode.c \
		lpeg-$(LPEG_VERSION)/lpprint.c \
		luafilesystem-$(LFS_VERSION)/src/lfs.c \
		lua-$(LUA_SRC_VERSION)/src/liblua.a \
		-lm -ldl

test_binary: dist/moon
	dist/moon