# lua is required in the build process, in order to compile the bytecode
lua := lua
cc := gcc
bundle = $(src_entry_dir)/bundle.lua
dump_loader = $(src_entry_dir)/dump_loader.lua

all_flags += -W -Wall -fPIC -std=gnu11

# requires lua, curl and zlib (in the future, lua will be statically linked)
main_libraries += -llua -lcurl -lz
main_cflags += $(all_flags)

loader_libraries += -lfuse -lpthread -lsquashfuse
loader_cflags += $(all_flags)
loader_cflags += -D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=29
loader_cflags += -I/usr/include/fuse

dst_dir = dst
src_main_dir = src/main
src_entry_dir = src/entry
src_loader_dir = src/loader

# Uncomment to get debugging symbols
# flags := -g

main_sources += $(wildcard $(src_main_dir)/*.lua)
main_sources += $(wildcard $(src_main_dir)/cli/*.lua)
main_sources += $(wildcard $(src_main_dir)/formats/*.lua)
main_sources += $(wildcard $(src_main_dir)/util/*.lua)

entry_sources = $(wildcard $(src_entry_dir)/*.c)

loader_sources = $(wildcard $(src_loader_dir)/*.c)

main_target = $(dst_dir)/slimpack
loader_target = $(dst_dir)/loader
bytecode_h_target = $(dst_dir)/bytecode.h
loader_h_target = $(dst_dir)/loader.h

.PHONY: build

build: $(main_target)

$(dst_dir):
	mkdir -p $@

$(bytecode_h_target): $(dst_dir) $(bundle) $(main_sources)
	$(lua) $(bundle) $(src_main_dir) $@ $(main_sources)
$(loader_h_target): $(dst_dir) $(dump_loader) $(loader_target)
	$(lua) $(dump_loader) $(loader_target) $@
$(loader_target): $(dst_dir) $(loader_sources)
	$(cc) $(loader_cflags) $(loader_libraries) $(loader_sources) -o $@
$(main_target): $(dst_dir) $(bytecode_h_target) $(loader_h_target) $(entry_sources) $(main_sources)
	$(cc) $(main_cflags) $(main_libraries) -include $(bytecode_h_target) -include $(loader_h_target) $(entry_sources) -o $@