# 
# Copyright (C) 2006,2007 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

# where to build (and put) .ipk packages
OPKG:= \
  IPKG_TMP=$(TMP_DIR)/ipkg \
  IPKG_INSTROOT=$(TARGET_DIR) \
  IPKG_CONF_DIR=$(STAGING_DIR)/etc \
  IPKG_OFFLINE_ROOT=$(TARGET_DIR) \
  $(STAGING_DIR_HOST)/bin/opkg \
	-f $(STAGING_DIR)/etc/opkg.conf \
	--force-depends \
	--force-overwrite \
	--force-run-hooks

# invoke ipkg-build with some default options
IPKG_BUILD:= \
  ipkg-build -c -o 0 -g 0

IPKG_STATE_DIR:=$(TARGET_DIR)/usr/lib/opkg

define BuildIPKGVariable
  $(call shexport,Package/$(1)/$(2))
  $(1)_COMMANDS += var2file "$(call shvar,Package/$(1)/$(2))" $(2);
endef

PARENL :=(
PARENR :=)

dep_split=$(subst :,$(space),$(1))
dep_rem=$(subst !,,$(subst $(strip $(PARENL)),,$(subst $(strip $(PARENR)),,$(word 1,$(call dep_split,$(1))))))
dep_confvar=$(strip $(foreach cond,$(subst ||, ,$(call dep_rem,$(1))),$(CONFIG_$(cond))))
dep_pos=$(if $(call dep_confvar,$(1)),$(call dep_val,$(1)))
dep_neg=$(if $(call dep_confvar,$(1)),,$(call dep_val,$(1)))
dep_if=$(if $(findstring !,$(1)),$(call dep_neg,$(1)),$(call dep_pos,$(1)))
dep_val=$(word 2,$(call dep_split,$(1)))
strip_deps=$(strip $(subst +,,$(filter-out @%,$(1))))
filter_deps=$(foreach dep,$(call strip_deps,$(1)),$(if $(findstring :,$(dep)),$(call dep_if,$(dep)),$(dep)))

ifeq ($(DUMP),)
  define BuildTarget/ipkg
    IPKG_$(1):=$(PACKAGE_DIR)/$(1)_$(VERSION)_$(PKGARCH).ipk
    IDIR_$(1):=$(PKG_BUILD_DIR)/ipkg-$(PKGARCH)/$(1)
    INFO_$(1):=$(IPKG_STATE_DIR)/info/$(1).list

    ifeq ($(if $(VARIANT),$(BUILD_VARIANT)),$(VARIANT))
    ifdef Package/$(1)/install
      ifneq ($(CONFIG_PACKAGE_$(1))$(SDK)$(DEVELOPER),)
        compile: $$(IPKG_$(1)) $(STAGING_DIR_ROOT)/stamp/.$(1)_installed

        ifeq ($(CONFIG_PACKAGE_$(1)),y)
          install: $$(INFO_$(1))
        endif
      else
        compile: $(1)-disabled
        $(1)-disabled:
		@echo "WARNING: skipping $(1) -- package not selected"
      endif
    endif
    endif

    IDEPEND_$(1):=$$(call filter_deps,$$(DEPENDS))
  
    $(eval $(call BuildIPKGVariable,$(1),conffiles))
    $(eval $(call BuildIPKGVariable,$(1),preinst))
    $(eval $(call BuildIPKGVariable,$(1),postinst))
    $(eval $(call BuildIPKGVariable,$(1),prerm))
    $(eval $(call BuildIPKGVariable,$(1),postrm))

    $(STAGING_DIR_ROOT)/stamp/.$(1)_installed: $(STAMP_BUILT)
	rm -rf $(STAGING_DIR_ROOT)/tmp-$(1)
	mkdir -p $(STAGING_DIR_ROOT)/stamp $(STAGING_DIR_ROOT)/tmp-$(1)
	$(call Package/$(1)/install,$(STAGING_DIR_ROOT)/tmp-$(1))
	$(call Package/$(1)/install_lib,$(STAGING_DIR_ROOT)/tmp-$(1))
	$(CP) $(STAGING_DIR_ROOT)/tmp-$(1)/. $(STAGING_DIR_ROOT)/
	rm -rf $(STAGING_DIR_ROOT)/tmp-$(1)
	touch $$@

    $$(IPKG_$(1)): $(STAGING_DIR)/etc/opkg.conf $(STAMP_BUILT)
	@rm -f $(PACKAGE_DIR)/$(1)_*
	rm -rf $$(IDIR_$(1))
	mkdir -p $$(IDIR_$(1))/CONTROL
	echo "Package: $(1)" > $$(IDIR_$(1))/CONTROL/control
	echo "Version: $(VERSION)" >> $$(IDIR_$(1))/CONTROL/control
	( \
		DEPENDS='$(EXTRA_DEPENDS)'; \
		for depend in $$(filter-out @%,$$(IDEPEND_$(1))); do \
			DEPENDS=$$$${DEPENDS:+$$$$DEPENDS, }$$$${depend##+}; \
		done; \
		echo "Depends: $$$$DEPENDS"; \
		echo "Provides: $(PROVIDES)"; \
		echo "Source: $(SOURCE)"; \
		echo "Section: $(SECTION)"; \
		echo "Priority: $(PRIORITY)"; \
		echo "Maintainer: $(MAINTAINER)"; \
		echo "Architecture: $(PKGARCH)"; \
		echo "Installed-Size: 1"; \
		echo -n "Description: "; getvar $(call shvar,Package/$(1)/description) | sed -e 's,^[[:space:]]*, ,g'; \
 	) >> $$(IDIR_$(1))/CONTROL/control
	chmod 644 $$(IDIR_$(1))/CONTROL/control
	(cd $$(IDIR_$(1))/CONTROL; \
		$($(1)_COMMANDS) \
	)
	$(call Package/$(1)/install,$$(IDIR_$(1)))
	mkdir -p $(PACKAGE_DIR)
	-find $$(IDIR_$(1)) -name 'CVS' -o -name '.svn' -o -name '.#*' | $(XARGS) rm -rf
	$(RSTRIP) $$(IDIR_$(1))
	SIZE=`cd $$(IDIR_$(1)); du -bs --exclude=./CONTROL . 2>/dev/null | cut -f1`; \
	$(SED) "s|^\(Installed-Size:\).*|\1 $$$$SIZE|g" $$(IDIR_$(1))/CONTROL/control
	$(IPKG_BUILD) $$(IDIR_$(1)) $(PACKAGE_DIR)
	@[ -f $$(IPKG_$(1)) ] || false 

    $$(INFO_$(1)): $$(IPKG_$(1))
	@[ -d $(TARGET_DIR)/tmp ] || mkdir -p $(TARGET_DIR)/tmp
	$(OPKG) install $$(IPKG_$(1))

    $(1)-clean:
	rm -f $(PACKAGE_DIR)/$(1)_*

    clean: $(1)-clean

  endef

  $(STAGING_DIR)/etc/opkg.conf:
	mkdir -p $(STAGING_DIR)/etc
	( echo "dest root /"				> $@; \
	  echo "arch all 100"				>> $@; \
	  echo "arch $(PKGARCH) 200"			>> $@; \
	  echo "option offline_root $(TARGET_DIR)"	>> $@ )

endif