#
# This Makefile executes the unpack/build/binary targets for a single
# subarch, which is passed in the subarch variable. Empty subarch
# variable means that we are building for an arch without the subarch.
# Additionally, variables version, abiname and ltver are
# expected to be available (need to be exported from the parent process).
# It is possible to override the flavours by setting the flavours
# variable. It will also be passed a list of source files
#
SHELL  := sh -e
DEB_HOST_ARCH     := $(shell dpkg-architecture -a$(ARCH) -qDEB_HOST_ARCH)
DEB_HOST_GNU_TYPE := $(shell dpkg-architecture -a$(ARCH) -qDEB_HOST_GNU_TYPE)
DEB_BUILD_ARCH    := $(shell dpkg-architecture -a$(ARCH) -qDEB_BUILD_ARCH)
#
# Build the list of common config files to be included
#
ifeq ($(SUBARCH),none)
  basedir := debian/arch/$(ARCH)
  append  := 
else
  basedir := debian/arch/$(ARCH)/$(SUBARCH)
  append  := $(SUBARCH)-
endif

configs := $(notdir $(wildcard $(basedir)/config.*))
configs := $(filter-out config, $(configs))
ifndef flavours
  flavours := $(patsubst config.%,%,$(configs))
endif

-include $(basedir)/Makefile.inc

include debian/rules.defs

#
# Here we construct the command lines for different make-kpkg
# calls (build, linux-image, linux-headers) based on the values
# of variables defined so far and provided by the arch/subarch
# in Makefile.inc. @flavour@ in the expressions is going to be
# replaced by the flavour for which the command is run. 
#
kpkg_header := HEADER_CLEAN_HOOK='$(CURDIR)/$(BUILD_DIR)/header-install-$(ARCH)-$(SUBARCH)'
kpkg_header += make-kpkg --append-to-version $(append)-$(ABINAME)
kpkg_header += --arch $(ARCH)
kpkg_header += --stem linux
kpkg_header += --config defconfig
kpkg_image := make-kpkg --append-to-version -$(ABINAME)-$(FLAVOUR)
kpkg_image += --arch $(ARCH)
kpkg_image += --stem linux
kpkg_image += --initrd
ifdef KPKG_SUBARCH
  kpkg_image += --subarch $(KPKG_SUBARCH)
endif
ifdef headers_subarch
  kpkg_header += --subarch $(headers_subarch)
endif
ifneq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
  kpkg_image += --cross-compile=$(DEB_HOST_GNU_TYPE)
endif
setup_env := env -i
setup_env += HOME=$(HOME) LOGNAME=$(LOGNAME) PATH=$(PATH)
setup_env += DEBIAN_ABINAME=$(ABINAME) DEBIAN_FLAVOUR=$(FLAVOUR) DEBIAN_VERSION=$(VERSION)
ifdef build_makeflags
  setup_env += MAKEFLAGS=$(build_makeflags)
endif
ifndef headers_dirs
  headers_dirs = $(DEB_HOST_ARCH)
endif
ccommon = debian/arch/config debian/arch/$(ARCH)/config debian/arch/$(ARCH)/$(SUBARCH)/config

#
# Targets
#
binary-arch-subarch: install-header-$(ARCH)-$(SUBARCH)
binary-arch-flavour: install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

binary-indep: install-doc install-patch install-source install-tree

build: $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

setup-arch: $(STAMPS_DIR)/source
setup-subarch: $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)
setup-flavour: $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

$(BUILD_DIR)/header-install-$(ARCH)-$(SUBARCH): $(TEMPLATES_DIR)/header-install.in
	sed -e 's,@kbpkg@,$(kbpkg),g'				\
	    -e 's,@ksource_dir@,$(CURDIR)/$(kdir),g'		\
	    -e 's,@flavours@,$(flavours),g'			\
	    -e 's,@headers_dirs@,$(headers_dirs),g'		\
            $< > $@
	chmod u+x $@
#
# The way to make the correct package names is to make a
# subarch-specific post-install script...
#
ifdef extra_postinstall_command
  extra_command := $(extra_postinstall_command)
else
  extra_command := true
endif
$(BUILD_DIR)/post-install-$(ARCH)-$(SUBARCH): $(TEMPLATES_DIR)/post-install.in
	sed -e 's,@initrd_modules@,$(initrd_modules),'			\
	    -e 's,@append_subarch@,$(append),'				\
	    -e 's,@extra_postinstall_command@,$(extra_command),'	\
	    -e 's,@headers_dirs@,$(headers_dirs),g'			\
	    $< > $@
#
# Generates the kernel config file for a subarch by merging
# the arch-independent config file (arch/config),
# arch-specific config file (arch/$(karch)/config),
# and subarch specific one (arch/$(karch)/$(subarch)/config).
# It is possible to avoid the inclusion of the arch-indep
# config file by setting include_common_config = no in the
# arch/$(karch)/Makefile.inc.
#
$(BUILD_DIR)/config.$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(basedir)/config.$(FLAVOUR)
	@echo "configs=$(configs)"
	@echo "Generating configuration file $@:"
	rm -f $@
	for i in $(ccommon); do	\
	  if [ -f $${i} ]; then	\
	    cat $${i} >> $@;	\
	  fi;			\
	done
#	Flavour config file must be present
	cat $(basedir)/config.$(FLAVOUR) >> $@			 

$(BUILD_DIR)/linux-source-$(VERSION).tar.bz2: SOURCE_DIR=$(BUILD_DIR)/source
$(BUILD_DIR)/linux-source-$(VERSION).tar.bz2: DIR = $(BUILD_DIR)/linux-source-$(VERSION)
$(BUILD_DIR)/linux-source-$(VERSION).tar.bz2: $(STAMPS_DIR)/source
	rm -rf $@ $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	chmod -R u+rw,go=rX $(DIR)
	cd $(BUILD_DIR); tar -cjf linux-source-$(VERSION).tar.bz2 linux-source-$(VERSION)
	rm -rf $(DIR)

srcfiles := $(filter-out debian, $(wildcard *))
$(STAMPS_DIR)/source: DIR=$(BUILD_DIR)/source
$(STAMPS_DIR)/source: debian/bin/apply
	rm -rf $(DIR)
	mkdir -p $(DIR)
	cp -al $(srcfiles) $(DIR)
	cd $(DIR); override_version=$(SOURCE_VERSION) home=$(CURDIR)/debian/patches-debian $(CURDIR)/debian/bin/apply
	#make-kpkg does this when building kernel-source.
	mv $(DIR)/scripts/package/Makefile $(DIR)/scripts/package/Makefile.dist
	mv $(DIR)/scripts/package/builddeb $(DIR)/scripts/package/builddeb.dist
	echo "# Dummy Makefile" > $(DIR)/scripts/package/Makefile
	echo "all:" >> $(DIR)/scripts/package/Makefile
	touch $@

patches  := $(wildcard debian/patches-arch/$(SUBARCH).*)
patches  += $(wildcard debian/patches-arch/$(SUBARCH)_*)
patches  += $(wildcard debian/patches-arch/$(ARCH).*)
patches  += $(wildcard debian/patches-arch/$(ARCH)_*)
patches  := $(strip $(patches))
$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): SOURCE_DIR=$(BUILD_DIR)/source
$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): DIR=$(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): $(BUILD_DIR)/post-install-$(ARCH)-$(SUBARCH) $(STAMPS_DIR)/source
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	mkdir -p $(DIR)/debian
	cp debian/changelog $(DIR)/debian
	cp debian/copyright $(DIR)/debian
	cp debian/control $(DIR)/debian/control
	touch $(DIR)/debian/official
	if [ -n '$(patches)' ]; then			\
	  cd $(DIR);					\
	  cat $(addprefix $(CURDIR)/,$(patches)) | patch -p1;	\
	fi
	install $< $(DIR)/debian/post-install
	touch $@
#
# This target performs a build for a particular flavour. Note
# that in this file it should be always placed *before* the
# build-$(subarch)-% target, which creates the build directory.
#
$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
	ln -fs $$(command -v touch) debian/build/touch.orig
	cd $(DIR); $(setup_env) PATH=$(CURDIR)/build:$(CURDIR)/bin:$(PATH) $(kpkg_image) build
ifdef image_postproc
	cd $(DIR); $(image_postproc)
endif
	touch $@

$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR): SOURCE_DIR=$(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(BUILD_DIR)/config.$(ARCH)-$(SUBARCH)-$(FLAVOUR) $(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH)
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	cp $< $(DIR)/.config
	cd $(DIR); $(setup_env) $(kpkg_image) configure
	touch $@

$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH): SOURCE_DIR=$(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH): $(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH)
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	cd $(DIR); $(setup_env) $(kpkg_header) configure
	touch $@

install-base:
	dh_compress
	dh_fixperms
	dh_installdeb
	dh_gencontrol -- $(GENCONTROL_ARGS)
	dh_md5sums
	dh_builddeb

install-doc: SOURCE_DIR=$(BUILD_DIR)/source
install-doc: DIR=$(BUILD_DIR)/$@
install-doc: $(STAMPS_DIR)/source
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	mkdir -p $(DIR)/debian
	cp debian/changelog $(DIR)/debian
	cp debian/copyright $(DIR)/debian
	cp debian/control $(DIR)/debian/control
	touch $(DIR)/debian/official
	cd $(DIR) && $(setup_env) make-kpkg --stem linux kernel-doc
	cat $(DIR)/debian/files >> debian/files
	@for i in $$(awk '{ print $$1; }' $(DIR)/debian/files); do echo mv $(BUILD_DIR)/$$i ..; mv $(BUILD_DIR)/$$i ..; done
	rm -rf $(DIR)

install-dummy:
	dh_testdir
	dh_testroot
	dh_clean -d -k
	dh_installchangelogs
	dh_installdocs
	$(MAKE) -f debian/rules.real install-base

install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR): SOURCE_DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DIR=$(BUILD_DIR)/$@
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	cd $(DIR); $(setup_env) $(kpkg_image) kernel-image
	cat $(DIR)/debian/files >> debian/files
	@for i in $$(awk '{ print $$1; }' $(DIR)/debian/files); do echo mv $(BUILD_DIR)/$$i ..; mv $(BUILD_DIR)/$$i ..; done
	rm -rf $(DIR)

install-header-$(ARCH)-$(SUBARCH): SOURCE_DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)
install-header-$(ARCH)-$(SUBARCH): DIR=$(BUILD_DIR)/$@
install-header-$(ARCH)-$(SUBARCH): $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH) $(BUILD_DIR)/header-install-$(ARCH)-$(SUBARCH)
	rm -rf $(DIR)
	cp -al $(SOURCE_DIR) $(DIR)
	cd $(DIR); $(setup_env) $(kpkg_header) kernel-headers
	cat $(DIR)/debian/files >> debian/files
	@for i in $$(awk '{ print $$1; }' $(DIR)/debian/files); do echo mv $(BUILD_DIR)/$$i ..; mv $(BUILD_DIR)/$$i ..; done
	rm -rf $(DIR)

install-patch: PACKAGE = linux-patch-debian-$(VERSION)
install-patch: pbase := /usr/src/kernel-patches/all/$(VERSION)
install-patch: pfull := debian/$(PACKAGE)$(pbase)
install-patch: ptchs := $(notdir $(wildcard debian/patches-arch/*))
install-patch: DH_OPTIONS = -p$(PACKAGE)
install-patch:
	dh_testdir
	dh_testroot
	dh_clean -d -k $(DH_OPTIONS)
	dh_installdirs $(DH_OPTIONS) $(pbase)/apply $(pbase)/debian $(pbase)/unpatch
	dh_install $(DH_OPTIONS) debian/patches-debian/* $(pbase)/debian
#	Install the debian patches
	sed 's/@version@/$(release)/g' debian/bin/apply > $(pfull)/apply/debian
	sed 's/@upstream@/$(version)/g' debian/bin/unpatch > $(pfull)/unpatch/debian
	chmod 755 $(pfull)/apply/debian $(pfull)/unpatch/debian
	chmod 644 $(pfull)/debian/*.patch
	bzip2 -9 $(pfull)/debian/*.patch
#	Now the arch/subarch-specific patches
	for i in $(ptchs); do \
	  arch=$${i%%.*}; \
	  ( \
	    echo "Patch-name: $${arch}"; \
	    echo "Patch-id: $${arch}_$(subst .,_,$(VERSION))"; \
	    echo "Path-strip-level: 1"; \
	    echo; \
	    echo "Patch-file: debian/patches-arch/$${i}"; \
	    echo "Architecture: $${arch}"; \
	    echo "Kernel-version: $(VERSION)"; \
	    echo; \
	  ) > debian/$(PACKAGE).kpatches.arch; \
	  dh_installkpatches $(DH_OPTIONS); \
	done
	dh_installdocs $(DH_OPTIONS)
	dh_installchangelogs $(DH_OPTIONS)
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS=$(DH_OPTIONS)

install-source: DH_OPTIONS = -plinux-source-$(VERSION)
install-source: $(BUILD_DIR)/linux-source-$(VERSION).tar.bz2
	dh_testdir
	dh_testroot
	dh_install $(DH_OPTIONS) $< /usr/src
	dh_installdocs $(DH_OPTIONS) README
	dh_installchangelogs $(DH_OPTIONS)
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS=$(DH_OPTIONS)

install-tree: DH_OPTIONS = -plinux-tree-$(VERSION)
install-tree:
	$(MAKE) -f debian/rules.real install-dummy DH_OPTIONS=$(DH_OPTIONS)