#
# 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).
#
SHELL  := bash -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)

export PYTHONPATH = $(CURDIR)/debian/lib/python
export DH_OPTIONS
export DEB_HOST_ARCH

#
# Build the list of common config files to be included
#
ifeq ($(SUBARCH),none)
  basedir := debian/arch/$(ARCH)
else
  basedir := debian/arch/$(ARCH)/$(SUBARCH)
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_image := make-kpkg --append-to-version '$(ABINAME)$(LOCALVERSION)'
kpkg_image += --arch '$(ARCH)'
kpkg_image += --stem linux
ifneq ($(INITRAMFS),False)
  kpkg_image += --initrd
endif
ifdef KPKG_SUBARCH
  kpkg_image += --subarch '$(KPKG_SUBARCH)'
endif
setup_env := env -u ABINAME -u ARCH -u SUBARCH -u FLAVOUR -u VERSION -u LOCALVERSION
setup_makeflags =
ifneq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
  setup_makeflags += CROSS_COMPILE=$(DEB_HOST_GNU_TYPE)-
  ifdef COMPILER
    setup_makeflags += CC=$(DEB_HOST_GNU_TYPE)-$(COMPILER)
  endif
  kpkg_image += --cross-compile='$(DEB_HOST_GNU_TYPE)'
else
  ifdef COMPILER
    setup_makeflags += CC=$(COMPILER)
  endif
endif
setup_env += MAKEFLAGS='$(setup_makeflags)'

ifdef DEBIAN_KERNEL_JOBS
  setup_env_kpkg_jobs = CONCURRENCY_LEVEL=$(DEBIAN_KERNEL_JOBS)
  JOBS_ARG = -j$(DEBIAN_KERNEL_JOBS)
endif

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

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

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

setup-flavour: $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)

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

#
# 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)/$(subarch)/config).
#
config_common = debian/arch/config debian/arch/$(ARCH)/config
ifneq ($(SUBARCH),none)
  config_common += debian/arch/$(ARCH)/$(SUBARCH)/config
endif
$(BUILD_DIR)/config.$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(basedir)/config.$(FLAVOUR) $(config_common)
	@echo "Generating configuration file $@:"
	ocaml debian/bin/kconfig.ml -b "debian/arch" -a "$(ARCH)" -s "$(SUBARCH)" -f "$(FLAVOUR)" > '$@'

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

define patch_cmd
cd '$(DIR)'; python2.4 '$(CURDIR)/debian/bin/apply.py' --overwrite-home='$(CURDIR)/debian/patches' --overwrite-source='$(SOURCEVERSION)' --overwrite-revisions='$(REVISIONS)'
endef

srcfiles := $(filter-out debian, $(wildcard * .[^.]*))
$(STAMPS_DIR)/source: DIR=$(BUILD_DIR)/source
$(STAMPS_DIR)/source: debian/bin/apply.py
	rm -rf '$(DIR)'
	mkdir -p '$(DIR)'
	cp -al $(srcfiles) '$(DIR)'
	$(patch_cmd)
	touch '$@'

$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): SOURCE_DIR=$(BUILD_DIR)/source
$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): DIR=$(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH): $(STAMPS_DIR)/source
	rm -rf '$(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'
	$(patch_cmd) -a $(ARCH) -s $(SUBARCH)
	touch '$@'
#
# 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)-$(TYPE): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package: $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)
	cd '$(DIR)'; $(setup_env) $(setup_env_kpkg_jobs) PATH='$(CURDIR)/build:$(CURDIR)/bin:$(PATH)' $(kpkg_image) build
	touch '$@'

$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen: $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)
	cd '$(DIR)'; $(setup_env) make ARCH=$(KERNEL_ARCH) $(JOBS_ARG)
	touch '$@'

$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): SOURCE_DIR=$(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

$(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package: $(BUILD_DIR)/config.$(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)-$(SUBARCH)-$(FLAVOUR)-plain-xen: $(BUILD_DIR)/config.$(ARCH)-$(SUBARCH)-$(FLAVOUR) $(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH)
	rm -rf '$(DIR)'
	cp -al '$(SOURCE_DIR)' '$(DIR)'
	cp '$<' '$(DIR)/.config'
	echo '$(ABINAME)$(LOCALVERSION)' > '$(DIR)/localversion'
	cd '$(DIR)'; $(setup_env) make prepare ARCH=$(KERNEL_ARCH) $(JOBS_ARG)
	touch '$@'

install-base:
	dh_installchangelogs
	dh_installdocs
	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 '$(DIR)/debian/official'
	rm '$(DIR)/Makefile'
	sed -e 's,^EXTRAVERSION.*$$,EXTRAVERSION =,' < '$(SOURCE_DIR)/Makefile' > '$(DIR)/Makefile'
	cd '$(DIR)' && $(setup_env) make-kpkg --stem linux 		\
		--config defconfig kernel-manual
	cat '$(DIR)/debian/files' >> debian/files
	@for i in $$(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
	$(MAKE) -f debian/rules.real install-base

install-header-$(ARCH)-$(SUBARCH): PACKAGE_NAME = linux-headers-$(UPSTREAMVERSION)$(ABINAME)$(LOCALVERSION_HEADERS)
install-header-$(ARCH)-$(SUBARCH): DH_OPTIONS = -p$(PACKAGE_NAME)
install-header-$(ARCH)-$(SUBARCH): BASE_DIR = /usr/src/$(PACKAGE_NAME)
install-header-$(ARCH)-$(SUBARCH): SOURCE_DIR = $(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
install-header-$(ARCH)-$(SUBARCH): DIR = $(CURDIR)/debian/$(PACKAGE_NAME)/$(BASE_DIR)
install-header-$(ARCH)-$(SUBARCH): $(STAMPS_DIR)/source-$(ARCH)-$(SUBARCH)
	dh_testdir
	dh_testroot
	dh_clean -k -d
	cd $(SOURCE_DIR); \
	( \
	  find . \
	    -path './Documentation/*' -prune -o \
	    -path './arch/*' -prune -o \
	    -path './include/asm*' -prune -o \
	    -path './scripts/*' -prune -o \
	    -path './include/*' -print -o \
	    \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Rules.make' \) -print; \
	  find include/asm-generic -print; \
	  for i in $(KERNEL_HEADER_DIRS); do \
	    find arch/$$i \
	      \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Rules.make' \) -print; \
	    find include/asm-$$i -print; \
	  done; \
	) \
	| \
	cpio -pd --preserve-modification-time $(DIR)
	$(MAKE) -f debian/rules.real install-base

install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): REAL_VERSION = $(UPSTREAMVERSION)$(ABINAME)$(LOCALVERSION)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): PACKAGE_NAME = linux-headers-$(REAL_VERSION)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): PACKAGE_NAME_HEADERS = linux-headers-$(UPSTREAMVERSION)$(ABINAME)$(LOCALVERSION_HEADERS)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): PACKAGE_NAME_KBUILD = linux-kbuild-$(VERSION)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DH_OPTIONS = -p$(PACKAGE_NAME)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): BASE_DIR = /usr/src/$(PACKAGE_NAME)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): SOURCE_DIR = $(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): REF_DIR = $(BUILD_DIR)/source-$(ARCH)-$(SUBARCH)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): PACKAGE_DIR = $(CURDIR)/debian/$(PACKAGE_NAME)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DIR = $(PACKAGE_DIR)/$(BASE_DIR)
install-header-$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)
	dh_testdir
	dh_testroot
	dh_clean -k -d

	mkdir -p "${DIR}/arch/${KERNEL_ARCH}/kernel"
	mkdir -p "${DIR}/include"
	cp -a ${SOURCE_DIR}/{.config,Module.symvers}  "${DIR}"
	# TODO
	echo $(ABINAME)$(LOCALVERSION) > "${DIR}/localversion"

	cd ${SOURCE_DIR}; \
	find . -mindepth 1 -maxdepth 1 \
		! -name debian -a ! -name Documentation -a ! -name include -a \
		! -name DEBIAN -a ! -name scripts -a ! -name arch -a ! -name '.*' -a \( \
		-name Makefile -o -type d \) \
		-printf "../${PACKAGE_NAME_HEADERS}/%f\n" | \
		xargs ln -s --target-directory="${DIR}"
	
	cd ${SOURCE_DIR}; \
	find "arch/${KERNEL_ARCH}" -mindepth 1 -maxdepth 1 \( \
		-type d -a ! -name include -a ! -name kernel -o \
		-type f -a \( -name 'Makefile*' -o -name 'Kconfig*' \) \) \
		-printf "../../../${PACKAGE_NAME_HEADERS}/%p\n" | \
		xargs ln -s --target-directory="${DIR}/arch/${KERNEL_ARCH}"

	[ -d "${SOURCE_DIR}/arch/${KERNEL_ARCH}/include" ] && \
		cp -a "${SOURCE_DIR}/arch/${KERNEL_ARCH}/include" "${DIR}/arch/${KERNEL_ARCH}/include" || :
	[ -f "${SOURCE_DIR}/arch/${KERNEL_ARCH}/kernel/asm-offsets.s" ] && \
		ln -f "${SOURCE_DIR}/arch/${KERNEL_ARCH}/kernel/asm-offsets.s" "${DIR}/arch/${KERNEL_ARCH}/kernel" || :
	ln -s "../../../../${PACKAGE_NAME_HEADERS}/arch/${KERNEL_ARCH}/kernel/Makefile" "${DIR}/arch/${KERNEL_ARCH}/kernel"

	cd ${SOURCE_DIR}; \
	find include -mindepth 1 -maxdepth 1 \
		! -name config -a ! -name linux -a ! -name 'asm*' \
		-printf "../../${PACKAGE_NAME_HEADERS}/%p\n" | \
		xargs ln -s --target-directory="${DIR}/include"
	cp -a ${SOURCE_DIR}/include/config "${DIR}/include"
	
	ln -sf "asm-${KERNEL_ARCH}" "${DIR}/include/asm"

	cd ${SOURCE_DIR}; \
	for dir in linux asm-generic $(foreach t, $(KERNEL_HEADER_DIRS), asm-$(t)); do \
		mkdir "${DIR}/include/$$dir"; \
		for file in $$(find "include/$$dir" -mindepth 1 -maxdepth 1); do \
			if [ -e ${CURDIR}/${REF_DIR}/$$file ]; then \
				ln -s --target-directory="${DIR}/include/$$dir" "../../../${PACKAGE_NAME_HEADERS}/$$file"; \
			elif [ -d ${CURDIR}/${SOURCE_DIR}/$$file ]; then \
				cp -a "${CURDIR}/${SOURCE_DIR}/$$file" "${DIR}/include/$$dir"; \
			else \
				ln -f --target-directory="${DIR}/include/$$dir" "${CURDIR}/${SOURCE_DIR}/$$file"; \
			fi \
		done \
	done
	
	mkdir -p "${PACKAGE_DIR}/lib/modules/${REAL_VERSION}"
	ln -s "/usr/src/${PACKAGE_NAME}" "${PACKAGE_DIR}/lib/modules/${REAL_VERSION}/build"

	ln -s "../${PACKAGE_NAME_KBUILD}/scripts" "${DIR}"

	$(MAKE) -f debian/rules.real install-base

install-headers-all: PACKAGE_NAME = linux-headers-$(VERSION)
install-headers-all: DH_OPTIONS = -p$(PACKAGE_NAME)
install-headers-all:
	dh_testdir
	dh_testroot
	chmod a+x debian/modules/gencontrol.py
	dh_install $(DH_OPTIONS) debian/arch debian/lib debian/modules '/usr/src/linux-headers-$(VERSION)'
	dh_python $(DH_OPTIONS) -V 2.4 /usr/src/linux-headers-$(VERSION)/lib/python
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS='$(DH_OPTIONS)' GENCONTROL_ARGS='$(GENCONTROL_ARGS) -Vkernel:Provides=linux-headers-$(UPSTREAMVERSION)$(ABINAME)-$(ARCH)'

install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): REAL_VERSION = $(UPSTREAMVERSION)$(ABINAME)$(LOCALVERSION)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): PACKAGE_NAME = linux-image-$(REAL_VERSION)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): PACKAGE_DIR = $(CURDIR)/debian/$(PACKAGE_NAME)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)

install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package: $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)
ifdef IMAGE_POSTPROC
#	Install the postproc script into the hook directory
	install -d '$(DIR)/debian/image.d'
	install 'debian/bin/$(IMAGE_POSTPROC)' '$(DIR)/debian/image.d'
endif
	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

install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen: MODULES_PACKAGE_NAME = linux-modules-$(REAL_VERSION)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen: MODULES_PACKAGE_DIR = $(CURDIR)/debian/$(MODULES_PACKAGE_NAME)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen: DH_OPTIONS = -p$(PACKAGE_NAME) -p$(MODULES_PACKAGE_NAME)
install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen: $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE)
	dh_testdir
	dh_testroot
	dh_clean -d -k
	dh_installdirs 'boot'
	cp '$(DIR)/vmlinuz' $(PACKAGE_DIR)/boot/vmlinuz-$(REAL_VERSION)
	cd '$(DIR)'; $(setup_env) make modules_install ARCH=$(KERNEL_ARCH) INSTALL_MOD_PATH=$(MODULES_PACKAGE_DIR)
	rm $(MODULES_PACKAGE_DIR)/lib/modules/$(REAL_VERSION)/{build,source}
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS='$(DH_OPTIONS)'

install-patch: PACKAGE = linux-patch-debian-$(VERSION)
install-patch: pbase := /usr/src/kernel-patches/all/$(SOURCE_UPSTREAM)
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 $(DH_OPTIONS) debian/patches/* '$(pbase)/debian'
	sed \
	  -e 's,@home@,$(pbase)/debian,' \
	  -e 's,@revisions@,$(REVISIONS),' \
	  -e 's,@source@,$(SOURCEVERSION),' \
	  debian/bin/apply.py > '$(pfull)/apply/debian'
	sed -e 's/@upstream@/$(SOURCE_UPSTREAM)/g' debian/bin/unpatch > '$(pfull)/unpatch/debian'
	chmod 755 '$(pfull)/apply/debian' '$(pfull)/unpatch/debian'
	chmod 644 '$(pfull)/debian/'*.patch
	bzip2 -9 '$(pfull)/debian/'*.patch
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS='$(DH_OPTIONS)'

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

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