#! /usr/bin/make -f

# Uncomment this to turn on verbose mode.
#export DH_VERBOSE=1

# version number of the defaults package
VDEF	:= $(strip $(shell dpkg-parsechangelog | awk -F: '/^Version:/ {print $$NF}'))

VMAJOR	:= $(shell echo $(VDEF) | awk -F. '{print $$1}')
VMINOR	:= $(shell echo $(VDEF) | awk -F. '{print $$2}' | sed -e 's/\([0-9]*\).*/\1/')
REL_EXT	:= $(shell echo $(VDEF) | sed -e 's/^$(VMAJOR)\.$(VMINOR)//')

# llvm-defaults 0.1 is the first version for 2.7.
REL_NO_27	:= $(shell expr $(VMINOR) - 0)$(REL_EXT)

# llvm-defaults 0.2 is the first version for 2.8.
REL_NO_28	:= $(shell expr $(VMINOR) - 0)$(REL_EXT)

# llvm-defaults 0.7 is the first version for 2.9.
REL_NO_29	:= $(shell expr $(VMINOR) - 0)$(REL_EXT)

# llvm-defaults 0.9 is the first version for 3.0.
REL_NO_30	:= $(shell expr $(VMINOR) - 0)$(REL_EXT)

# llvm-defaults 0.10 is the first version for 3.1.
REL_NO_31	:= $(shell expr $(VMINOR) - 0)$(REL_EXT)

# minimum required version
REQV            := (>= 3.0-4)

CURRENT_VERSION := 3.0

# architecture dependent variables
DEB_HOST_ARCH		:= $(shell dpkg-architecture -qDEB_HOST_ARCH)
DEB_HOST_GNU_TYPE	:= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)

# complete version number, including the release
CV_LLVM		:= 1:$(CURRENT_VERSION)-$(REL_NO_30)

distribution := $(shell lsb_release -is)
all_packages	:= llvm llvm-runtime llvm-dev libllvm-ocaml-dev
no_packages	:= llvm-gcc # must be built?

packages := $(filter-out $(no_packages), $(all_packages))

# derived version number (without release)
V_LLVM  := $(shell echo $(CV_LLVM) | sed 's/^[0-9]*://' | sed 's/-[^-]*$$//')

# number for the package name
PV_LLVM := $(shell echo $(V_LLVM) | awk -F. '{printf "%d.%d", $$1, $$2}')

OS_NAME := Linux

ifeq ($(DEB_HOST_ARCH),hurd-i386)
    OS_NAME	:= Hurd
endif

ifneq (,$(filter $(DEB_HOST_ARCH),kfreebsd-i386 kfreebsd-amd64))
    OS_NAME	:= kFreeBSD
endif

README:
	m4 -DPACKAGES="$(packages)" \
	   -DOS_NAME=$(OS_NAME) \
	   -DDEB_ARCH=$(DEB_HOST_ARCH) \
	   -DPV_LLVM=$(CURRENT_VERSION) \
	   debian/README.Debian.m4 > debian/README.Debian.tmp2
	uniq debian/README.Debian.tmp2 > debian/README.Debian.tmp
	rm -f debian/README.Debian.tmp2
	[ -e debian/README.Debian ] \
	  && cmp -s debian/README.Debian debian/README.Debian.tmp \
	  && rm -f debian/README.Debian.tmp && exit 0; \
	  mv debian/README.Debian.tmp debian/README.Debian
.PHONY: README

substvars:
	( \
	  echo 'version:llvm=$(CV_LLVM)'; \
	  echo 'pv:llvm=$(CURRENT_VERSION)'; \
	  echo 'reqv:llvm=$(REQV)'; \
	) > debian/substvars.local
.PHONY: substvars
build: build-arch build-indep
build-arch: build-stamp
build-indep: build-stamp
build-stamp:
	dh_testdir
	touch build-stamp

clean:
	dh_testdir
	dh_testroot
	rm -f *-stamp
	rm -f debian/substvars.local
	dh_clean

install: build README substvars
	dh_testdir
	dh_testroot
	dh_clean -k

	for p in $(packages); do \
	  cp -l debian/substvars.local debian/$$p.substvars; \
	done

	: # llvm
	dh_installdirs -pllvm \
		usr/bin usr/share/man/man1
	for bin in \
		bugpoint llc llvm-ar llvm-as llvm-bcanalyzer llvm-config \
		llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract \
		llvm-ld llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof \
		llvm-ranlib llvm-rtdyld llvm-size llvm-stub llvm-tblgen \
		macho-dump opt ; do \
		dh_link -pllvm \
			/usr/lib/llvm-$(PV_LLVM)/bin/$$bin \
			/usr/bin/$$bin ; \
	done
	for man in \
		bugpoint lit llc llvm-ar llvm-as llvm-bcanalyzer llvm-config \
		llvm-diff llvm-dis llvm-extract llvm-ld llvm-link llvm-nm \
		llvm-prof llvm-ranlib opt tblgen ; do \
		dh_link -pllvm \
			/usr/share/man/man1/$$man-$(PV_LLVM).1.gz \
			/usr/share/man/man1/$$man.1.gz ; \
	done

	: # llvm-runtime
	dh_installdirs -pllvm-runtime \
		usr/bin usr/share/man/man1
	dh_link -pllvm-runtime \
		/usr/lib/llvm-$(PV_LLVM)/bin/lli /usr/bin/lli
	dh_link -pllvm-runtime \
	  /usr/share/man/man1/lli-$(PV_LLVM).1.gz /usr/share/man/man1/lli.1.gz

	: # llvm-dev
	dh_installdirs -pllvm-dev \
		/usr/include \
		/usr/share/vim/addons/syntax/ \
		/usr/lib
	dh_link -pllvm-dev \
		/usr/lib/llvm-$(CURRENT_VERSION)/include/llvm /usr/include/llvm \
		/usr/lib/llvm-$(CURRENT_VERSION)/include/llvm-c /usr/include/llvm-c \
		/usr/share/vim/addons/syntax/llvm-$(CURRENT_VERSION).vim /usr/share/vim/addons/syntax/llvm.vim \
		/usr/share/vim/addons/syntax/tablegen-$(CURRENT_VERSION).vim /usr/share/vim/addons/syntax/tablegen.vim \
		/usr/share/emacs/site-lisp/llvm-$(CURRENT_VERSION) /usr/share/emacs/site-lisp/llvm

	for lib in \
		libLTO.so LLVMgold.so; do \
		dh_link -pllvm-dev \
		/usr/lib/llvm-$(CURRENT_VERSION)/lib/$$lib /usr/lib/$$lib; \
	done


	: # libllvm-ocaml-dev
	dh_installdirs -plibllvm-ocaml-dev \
		/usr/lib/ocaml/METAS
	dh_link -plibllvm-ocaml-dev \
		/usr/lib/ocaml/METAS/META.llvm-$(subst .,_,$(CURRENT_VERSION)) /usr/lib/ocaml/METAS/META.llvm \
		/usr/lib/ocaml/llvm-$(subst .,_,$(CURRENT_VERSION)) /usr/lib/ocaml/llvm

nopkgs := $(foreach p, $(no_packages),-N$(p))

binary-indep: build install
	# nothing to do

binary-arch: build install
	dh_testdir
	dh_testroot

	dh_installchangelogs -a $(nopkgs)
	dh_installdocs -a $(nopkgs) debian/README.Debian

	for p in $(filter-out llvm-runtime, $(all_packages)); do \
	  rm -rf debian/$$p/usr/share/doc/$$p; \
	  ln -s llvm-runtime debian/$$p/usr/share/doc/$$p; \
	done
	if [ -f debian/llvm-runtime/usr/share/doc/llvm-runtime/changelog ]; then \
	  mv debian/llvm-runtime/usr/share/doc/llvm-runtime/changelog \
	    debian/llvm-runtime/usr/share/doc/llvm-runtime/changelog.Debian; \
	fi

	dh_compress -a $(nopkgs) -X README.Debian
	dh_fixperms -a $(nopkgs)
	dh_installdeb -a $(nopkgs)

	for p in $(packages) ; do \
	  dh_gencontrol -p$$p -u-v$(CV_LLVM) ; \
	done

	dh_md5sums -a $(nopkgs)
	dh_builddeb -a $(nopkgs)

binary: binary-indep binary-arch
.PHONY: build clean binary-indep binary-arch binary install