# == defs

URL_BASE     = http://www.kernel.org/pub/linux/utils/boot/syslinux
URL_FILE     = SYSLINUX_URL
URL          = $(shell $(CAT) $(URL_FILE))
DLOAD_DIR    = /home/samba/dat/share/exe/linux/syslinux
BUILD_DIR    = cd_root
DIRS         = $(DLOAD_DIR) $(BUILD_DIR)
UNPACK_DIR   = isolinux
ISO_IMAGE   ?= image.iso
ISOLINUX_BIN = $(UNPACK_DIR)/isolinux.bin
MENU_32      = $(UNPACK_DIR)/com32/menu/menu.c32
INITRD       = /boot/initrd

CD_FILES = \
	$(MENU_32) \
	$(ISOLINUX_BIN)

define SYSLINUX_BASE
	$(notdir $(shell $(SED) 's/.tar.bz2$$//' $(URL_FILE)))
endef

# == targets

all: $(ISO_IMAGE)
install:
clean: syslinux.clean
distclean: clean

# == rules

syslinux.clean:
	rm -rf *.done
	rm -rf $(BUILD_DIR) $(UNPACK_DIR)
	rm -f $(ISO_IMAGE) $(URL_FILE) $(URL_FILE).tmp

dirs.done:
	mkdir -p $(DIRS)
	touch $@

$(URL_FILE):
	lynx -dump $(URL_BASE) | \
		$(SED) '/syslinux-.*\.tar\.bz2$$/ !d; s/ .*http:/http:/' |\
		tail -1 > $@.tmp
	mv $@.tmp $@

dload.done: $(URL_FILE)
	wget -c $(shell $(CAT) $<) -P $(DLOAD_DIR)
	touch $@

$(MENU_32): unpack.done

unpack.done: $(URL_FILE) dload.done
	tar -xjf $(shell echo $(DLOAD_DIR)/$(SYSLINUX_BASE).tar.bz2 | $(SED) 's/ //g')
	mv $(SYSLINUX_BASE) $(UNPACK_DIR)
	touch $@

GENERATE = sh $(MOD_SCRIPT_DIR)/generate_boot_medium.sh
BOOT_CONF = boot.conf

$(ISO_IMAGE): $(BOOT_CONF) dirs.done $(CD_FILES)
	$(GENERATE) -o $@ -d $(BUILD_DIR) -f $< $(CD_FILES)