#
# 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)
else
  basedir := debian/arch/$(ARCH)/$(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 += make-kpkg --append-to-version '$(KPKG_ABINAME)'
kpkg_header += --arch '$(ARCH)'
kpkg_header += --stem linux
kpkg_header += --config defconfig
kpkg_image := make-kpkg --append-to-version '$(KPKG_ABINAME)-$(FLAVOUR)'
kpkg_image += --arch '$(ARCH)'
kpkg_image += --stem linux
kpkg_image += --initrd
ifdef KPKG_SUBARCH
  kpkg_image += --subarch '$(KPKG_SUBARCH)'
  kpkg_header += --subarch '$(KPKG_SUBARCH)'
endif
ifneq ($(DEB_BUILD_ARCH),$(DEB_HOST_ARCH))
  kpkg_header += --cross-compile='$(DEB_HOST_GNU_TYPE)'
  kpkg_image += --cross-compile='$(DEB_HOST_GNU_TYPE)'
endif
setup_env := env -u ABINAME -u ARCH -u SUBARCH -u FLAVOUR -u VERSION
setup_env += DEBIAN_ABINAME='$(ABINAME)' DEBIAN_FLAVOUR='$(FLAVOUR)' DEBIAN_VERSION='$(VERSION)'
setup_makeflags =
ifdef COMPILER
  setup_makeflags += CC="$$$$(CROSS_COMPILE)$(COMPILER)"
endif
setup_env += MAKEFLAGS='$(setup_makeflags)'
ifndef headers_dirs
  headers_dirs = $(DEB_HOST_ARCH)
endif

#
# 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)

#
# 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.
#
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 $@:"
	rm -f '$@'
	for i in $(config_common); do	\
	  if [ -f "$${i}" ]; then	\
	    cat "$${i}" >> '$@';	\
	  fi;				\
	done
#	Flavour config file must be present
	cat '$(basedir)/config.$(FLAVOUR)' >> '$@'

$(BUILD_DIR)/linux-source-$(UPSTREAM_VERSION).tar.bz2: SOURCE_DIR=$(BUILD_DIR)/source
$(BUILD_DIR)/linux-source-$(UPSTREAM_VERSION).tar.bz2: DIR = $(BUILD_DIR)/linux-source-$(UPSTREAM_VERSION)
$(BUILD_DIR)/linux-source-$(UPSTREAM_VERSION).tar.bz2: $(STAMPS_DIR)/source
	rm -rf '$@' '$(DIR)'
	cp -al '$(SOURCE_DIR)' '$(DIR)'
	chmod -R u+rw,go=rX '$(DIR)'
	cd '$(BUILD_DIR)'; tar -cjf 'linux-source-$(UPSTREAM_VERSION).tar.bz2' 'linux-source-$(UPSTREAM_VERSION)'
	rm -rf '$(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)' override_revisions='$(REVISIONS)' home='$(CURDIR)/debian/patches-debian' sh '$(CURDIR)/debian/bin/apply'
	#make-kpkg does this when building kernel-source.
	mv '$(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): $(STAMPS_DIR)/source
	rm -rf '$(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)';					\
	  for patch in $(patches); do			\
	    cat "$(CURDIR)/$$patch" | patch -p1;	\
	  done;						\
	fi
	touch '$@'
#
# This target performs a build for a particular flavour. Note
# that in this file it should be always placed *before* the
# build-$(subarch)-% target, which creates the build directory.
#
$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
$(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR): $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
	ln -fs "$$(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 '$(DIR)/debian/official'
	rm '$(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
	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) debian/bin/install-image
	rm -rf '$(DIR)'
	cp -al '$(SOURCE_DIR)' '$(DIR)'
	install debian/bin/install-image '$(DIR)/debian/post-install'
	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)-$(SUBARCH)
	rm -rf '$(DIR)'
	cp -al '$(SOURCE_DIR)' '$(DIR)'
	install debian/bin/install-header '$(DIR)/install-header'
	cd '$(DIR)'; $(setup_env) HEADER_CLEAN_HOOK='$(CURDIR)/$(DIR)/install-header' $(kpkg_header) kernel-headers
	cat '$(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-headers-all: DH_OPTIONS = -plinux-headers-$(VERSION)
install-headers-all:
	dh_testdir
	dh_testroot
	dh_install $(DH_OPTIONS) debian/arch '/usr/src/linux-headers-$(VERSION)/debian'
	echo $(FLAVOURS) >'/usr/src/linux-headers-$(VERSION)/flavours'
	dh_installdocs $(DH_OPTIONS)
	dh_installchangelogs $(DH_OPTIONS)
	$(MAKE) -f debian/rules.real install-base DH_OPTIONS='$(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 $(DH_OPTIONS) debian/patches-debian/* '$(pbase)/debian'
#	Install the debian patches
	sed -e 's/@version@/$(SOURCE_VERSION)/g' -e 's/@revisions@/$(REVISIONS)/' debian/bin/apply > '$(pfull)/apply/debian'
	sed -e 's/@upstream@/$(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
#	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: $(BUILD_DIR)/linux-source-$(UPSTREAM_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)'