#!/usr/bin/make -f

#export DH_VERBOSE=1
DEB_HOST_ARCH ?= $(shell dpkg-architecture -qDEB_HOST_ARCH)
DEB_HOST_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
DEB_BUILD_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)

ROOT_DIR=$(shell pwd)
MAN_DIR = $(ROOT_DIR)/debian/erlang-docs/usr/lib/erlang/man

export HOME := $(ROOT_DIR)/debian

-include ${ROOT_DIR}/erts/vsn.mk
-include ${ROOT_DIR}/lib/diameter/vsn.mk
-include ${ROOT_DIR}/lib/erl_interface/vsn.mk
-include ${ROOT_DIR}/lib/jinterface/vsn.mk
-include ${ROOT_DIR}/lib/ic/vsn.mk
-include ${ROOT_DIR}/lib/tools/vsn.mk
-include ${ROOT_DIR}/lib/common_test/vsn.mk
-include ${ROOT_DIR}/lib/snmp/vsn.mk
SOURCE_VERSION=$(shell dpkg-parsechangelog | sed -ne's!^Version: \(.*\)-.*!\1!p')

PCRE_MAJOR=$(shell cat erts/emulator/pcre/pcre.h | grep PCRE_MAJOR | sed -e's/.*\s\([0-9]\+\).*/\1/')
PCRE_MINOR=$(shell cat erts/emulator/pcre/pcre.h | grep PCRE_MINOR | sed -e's/.*\s\([0-9]\+\).*/\1/')
PCRE_VERSION=$(PCRE_MAJOR).$(PCRE_MINOR)
ABI_VERSION=17.0

BINARY_TARGETS=binary-erlang-base
INSTALL_RULE=install-stnd-stamp
TMPINSTALL_DIR=debian/erlang-stnd
ERLANGBASE=erlang-base (= $${binary:Version})

USE_ESOCKET := $(shell echo ${DEB_HOST_ARCH} | egrep -c "hurd" | sed -es/1/no/ -es/0/yes/)
ifeq ($(USE_ESOCKET), no)
ESOCKET_OPT=--disable-esock
else
ESOCKET_OPT=--enable-esock
endif

USE_KERNEL_POLL := $(shell echo ${DEB_HOST_ARCH} | egrep -c "hurd" | sed -es/1/no/ -es/0/yes/)
ifeq ($(USE_KERNEL_POLL), no)
KERNEL_POLL_OPT=--disable-kernel-poll
else
KERNEL_POLL_OPT=--enable-kernel-poll
endif

USE_CLOCK_GETTIME := $(shell echo ${DEB_HOST_ARCH} | egrep -c "bsd|hurd" | sed -es/1/no/ -es/0/yes/)
ifeq ($(USE_CLOCK_GETTIME), no)
CLOCK_GETTIME_OPT=
SYSTEMD_OPT=
else
CLOCK_GETTIME_OPT=--enable-clock-gettime
SYSTEMD_OPT=--enable-systemd
endif

# Temporary (until #475459 is fixed) disabling threads for sparc architecture
ifeq ($(DEB_HOST_ARCH), sparc)
THREAD_OPTS=--disable-threads --disable-smp-support
else
THREAD_OPTS=--enable-threads --enable-smp-support
endif

LIBSCTP=$(shell grep-status -s Depends -PX libsctp-dev |sed -e 's!.*\(libsctp[0-9]*\).*!\1!')
LIBSCTPDEP=$(shell grep-status -s Version -PX $(LIBSCTP) | sed -e's!^Version: \(.*\)-[^-]*!$(LIBSCTP) (>= \1)!')

USE_SCTP := $(shell echo ${DEB_HOST_ARCH} | egrep -c "bsd|hurd" | sed -es/1/no/ -es/0/yes/)
ifeq ($(USE_SCTP), no)
SCTP_OPT=--disable-sctp
else
SCTP_OPT=--enable-sctp
endif

ifeq ($(DEB_HOST_ARCH), armel)
OPTIMIZATION=-O1
else
ifeq ($(DEB_HOST_ARCH), mips64el)
OPTIMIZATION=-O1
else
OPTIMIZATION=-O2
endif
endif

ifeq ($(DEB_HOST_ARCH), i386)
SSE2=-msse2
else
SSE2=
endif

ifeq ($(findstring debug,$(DEB_BUILD_OPTIONS)),debug)
CFLAGS=-g $(OPTIMIZATION) -fno-strict-aliasing $(SSE2)
GEN_OPT_FLGS=$(OPTIMIZATION) -fno-strict-aliasing $(SSE2)
TYPE=debug
else
CFLAGS=-g $(OPTIMIZATION) -fno-strict-aliasing $(SSE2)
GEN_OPT_FLGS=$(OPTIMIZATION) -fno-strict-aliasing $(SSE2)
TYPE=
endif

JAVA_OPTIONS=-Xlint -source 1.8 -target 1.8

export LC_ALL := C.UTF-8

JOBS=4

debian/control: debian/control.in debian/rules
	sed -e's/@PCRE_VERSION@/$(PCRE_VERSION)/g' \
	    -e's/@ABI_VERSION@/$(ABI_VERSION)/g' <$< >$@

clean:
	dh_testdir
	dh_testroot
	#
	[ ! -f Makefile ] || ${MAKE} -j ${JOBS} clean
	rm -f lib/dialyzer/SKIP
	#
	# Remove installed erlang from debian/
	rm -rf debian/erlang-docs
	rm -rf debian/erlang-stnd
	#
	# Restore replaced configure, config.guess, and config.sub files
	for i in `find ${ROOT_DIR} -name 'configure.backup'` ; do \
	    mv $$i $${i%%.backup} ; \
	done
	for i in `find ${ROOT_DIR} -name 'config.guess~'` ; do \
	    mv $$i $${i%%\~} ; \
	done
	for i in `find ${ROOT_DIR} -name 'config.sub~'` ; do \
	    mv $$i $${i%%\~} ; \
	done
	rm -f lib/configure.in
	#
	# Remove files, which were generated from templates
	for i in debian/*.in debian/scripts/*.in ; do \
	    if [ "$$i" != "debian/control.in" ] ; then \
		rm -f $${i%%.in} ; \
	    fi ; \
	done
	#
	# *.install were also generated on-the-fly
	rm -f debian/*.install
	rm -f debian/erlang-doc.links
	rm -f debian/erlang-doc.doc-base.erlang-erts
	#
	rm -f debian/AUTHORS
	#
	# Remove touched stamp files
	rm -f *-stamp
	#
	dh_clean -Xtest.erl.orig

automake: automake-stamp
automake-stamp: debian/control
	dh_testdir
	#
	# Return error if there are known nonfree docs in upstream tarball
	# Return error if there are prebuilt binaries in upstream tarball
	err=0 ; \
	for fn in `find lib/*/doc -name standard -or -name archive` ; do \
	    err=1 ; \
	    echo Found directory $$fn with non-free docs in upstream. Please remove it. ; \
	done ; \
	if [ -f prebuilt.files ] ; then \
	    err=1 ; \
	    echo Found prebuilt binaries in upstream. Please remove them. ; \
	fi ; \
	if [ $$err = 1 ] ; then \
	    echo ; \
	    echo Use uscan --download to get the upstream tarball. ; \
	    echo ; \
	    false ; \
	fi
	#
	# Preserve configure scripts
	for i in `find ${ROOT_DIR} -not \( -wholename '*/.pc' -prune \) \
				    -a -name 'configure'` ; do \
	    cp -f $$i $$i.backup ; \
	done
	#
	# Replace config.guess and config.sub by installed in /usr/share/misc.
	# Also add suffix -gnu to ibm-linux in config.guess to fix FTBFS
	# on s390 architecture
	for i in `find ${ROOT_DIR} -not \( -wholename '*/.pc' -prune \) \
				    -a -name 'config.guess'` ; do \
	    cp -fb /usr/share/misc/config.guess $$i ; \
	    sed -i 's/-ibm-linux$$/-ibm-linux-gnu/g' $$i ; \
	done
	for i in `find ${ROOT_DIR} -not \( -wholename '*/.pc' -prune \) \
				    -a -name 'config.sub'` ; do \
	    cp -fb /usr/share/misc/config.sub $$i ; \
	done
	#
	# Regenerate configure scripts using autoconf
	./otp_build update_configure --no-commit
	#
	touch automake-stamp

configure-stnd: configure-stnd-stamp
configure-stnd-stamp: automake-stamp
	dh_testdir
	#
	echo "BUILDING STANDARD VERSION"
	#
	[ ! -f Makefile ] || ${MAKE} -j ${JOBS} clean
	rm -f lib/dialyzer/SKIP
	#
	CFLAGS="$(CFLAGS)" \
	./configure --host=$(DEB_HOST_GNU_TYPE) \
		    --build=$(DEB_BUILD_GNU_TYPE) \
		    --prefix=/usr \
		    --libexecdir=/usr/bin \
		    --infodir=/usr/share/info \
		    --mandir=/usr/share/man \
		    --enable-hybrid-heap \
		    $(THREAD_OPTS) \
		    $(KERNEL_POLL_OPT) \
		    $(ESOCKET_OPT) \
		    $(SYSTEMD_OPT) \
		    $(SCTP_OPT) \
		    $(CLOCK_GETTIME_OPT) \
		    --enable-dynamic-ssl-lib \
		    --with-ssl-rpath=no \
		    --enable-ethread-pre-pentium4-compatibility \
		    --enable-shared-zlib \
		    --disable-builtin-zlib \
		    --without-ssl-zlib \
		    --disable-silent-rules
	#
	touch configure-stnd-stamp

define do-install
	echo "*** do-install called for $(INSTALL_DIR)."

	# Calls make install.
	${MAKE} -j ${JOBS} DESTDIR=$(INSTALL_DIR) TYPE=$(TYPE) install

	# Replace ROOTDIR in "erl" and "start" scripts for real rootdir
	# If there's no erl or start then it's better to fail than silently continue
	for dir in $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/bin		\
		   $(INSTALL_DIR)/usr/lib/erlang/bin; do			\
	    for val in erl start; do						\
		sed -i 's!ROOTDIR=.*!ROOTDIR=/usr/lib/erlang!' $${dir}/$${val}; \
	    done;								\
	done

	# Correct ERL_ROOT in RELEASES file
	sed 's!%ERL_ROOT%!/usr/lib/erlang!' \
	    $(INSTALL_DIR)/usr/lib/erlang/releases/RELEASES.src \
	    >$(INSTALL_DIR)/usr/lib/erlang/releases/RELEASES

	# Get rid of windows cruft
	find $(INSTALL_DIR) -name *.bat -exec rm -v {} \;

	# Fix permissions
	cp $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/bin/start_erl.src \
	   $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/bin/start_erl
	chmod 755 $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/bin/start_erl
	chmod 755 $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/bin/*.src
	chmod 644 $(INSTALL_DIR)/usr/lib/erlang/bin/start.script
	chmod 644 $(INSTALL_DIR)/usr/lib/erlang/lib/wx-*/examples/*/*.beam

	# Remove some files which should be rather in erlang-doc-html package
	find $(INSTALL_DIR)/usr/lib/erlang/lib -name info -exec rm -v {} \;
	rm -rv $(INSTALL_DIR)/usr/lib/erlang/erts-$(VSN)/doc

	# Remove useless Install and manpage formatting scripts
	rm -v $(INSTALL_DIR)/usr/lib/erlang/Install
	rm -rv $(INSTALL_DIR)/usr/lib/erlang/misc
endef

# manpages builds section 1 manual pages
manpages: manpages-stamp
manpages-stamp: $(INSTALL_RULE)
	dh_testdir
	target=$$(basename $$(dirname $$(find make -name otp.mk))) ; \
	PATH=$(ROOT_DIR)/bin:$$PATH ; \
	for m in lib/diameter lib/snmp lib/dialyzer lib/erl_interface lib/common_test erts ; do \
	    ${MAKE} -j ${JOBS} -C $$m/doc/src man ERL_TOP=$(ROOT_DIR) TARGET=$$target ; \
	done
	#
	install -d $(MAN_DIR)/man1 $(MAN_DIR)/man3 ; \
	install lib/dialyzer/doc/man3/*.3 $(MAN_DIR)/man3 ; \
	for m in lib/diameter lib/snmp lib/erl_interface lib/common_test erts ; do \
	    install $$m/doc/man1/*.1 $(MAN_DIR)/man1 ; \
	done
	#
	sh debian/scripts/fixmanpages $(MAN_DIR) 1
	#
	touch manpages-stamp

build-stnd: build-stnd-stamp
build-stnd-stamp: configure-stnd-stamp
	dh_testdir
ifeq ($(findstring debug,$(DEB_BUILD_OPTIONS)),debug)
	${MAKE} -j ${JOBS} TYPE=$(TYPE) FLAVOR=smp GEN_OPT_FLGS="$(GEN_OPT_FLGS)" JAVA_OPTIONS="$(JAVA_OPTIONS)" emulator
	${MAKE} -j ${JOBS} TYPE=$(TYPE) FLAVOR=plain GEN_OPT_FLGS="$(GEN_OPT_FLGS)" JAVA_OPTIONS="$(JAVA_OPTIONS)" emulator
endif
	${MAKE} -j ${JOBS} TYPE=$(TYPE) GEN_OPT_FLGS="$(GEN_OPT_FLGS)" JAVA_OPTIONS="$(JAVA_OPTIONS)"
	touch build-stnd-stamp

docs: docs-stamp
docs-stamp: $(INSTALL_RULE)
	dh_testdir
	PATH=$(ROOT_DIR)/bin:$$PATH $(MAKE) -j ${JOBS} docs
	$(MAKE) -j ${JOBS} DESTDIR=$(ROOT_DIR)/debian/erlang-docs install-docs
	#
	sh debian/scripts/fixmanpages $(MAN_DIR) 2
	#
	(cd $(ROOT_DIR)/debian/erlang-docs/usr/lib/erlang/lib ; \
	 perl $(ROOT_DIR)/debian/scripts/genindex >index.html ; \
	 perl $(ROOT_DIR)/debian/scripts/genlinks $(VSN) >$(ROOT_DIR)/debian/erlang-doc.links)
	touch docs-stamp

install-stnd: install-stnd-stamp
install-stnd-stamp: INSTALL_DIR=$(ROOT_DIR)/debian/erlang-stnd
install-stnd-stamp: build-stnd-stamp
	dh_testdir
	$(do-install)
	touch install-stnd-stamp

build: build-arch build-indep
build-arch: build-stamp manpages-stamp
build-indep: build-stamp
build-stamp: $(INSTALL_RULE)
	dh_testdir
	#
	for i in debian/*.in debian/scripts/*.in ; do \
	    if [ "$$i" != "debian/control.in" ] ; then \
	    	sed -e's/@VERSION@/$(VSN)/g' \
	     	    -e's/@SOURCE_VERSION@/$(SOURCE_VERSION)/g' \
	     	    -e's/@ABI_VERSION@/$(ABI_VERSION)/g' \
	     	    -e's/@PCRE_VERSION@/$(PCRE_VERSION)/g' \
	     	    -e's/@EI_VSN@/$(EI_VSN)/g' \
	     	    -e's/@JINTERFACE_VSN@/$(JINTERFACE_VSN)/g' \
	     	    -e's/@IC_VSN@/$(IC_VSN)/g' \
		    -e's/@COMMON_TEST_VSN@/$(COMMON_TEST_VSN)/g' \
		    -e's/@SNMP_VSN@/$(SNMP_VSN)/g' \
		    -e's/@DIAMETER_VSN@/$(DIAMETER_VSN)/g' \
		    -e's/@TOOLS_VSN@/$(TOOLS_VSN)/g' <$$i >$${i%%.in} ; \
	    fi ; \
	done
	sed -e's/@VERSION@/$(VSN)/g' <debian/in.erlang-doc.doc-base.erlang-erts \
	    >debian/erlang-doc.doc-base.erlang-erts
	#
	# Place each installed file into the proper package.
	# See this script and the debian/patterns/* files for more informations.
	sh debian/scripts/analyse $(TMPINSTALL_DIR)
	#
	# Add all author lists to debian/AUTHORS
	f=1 ; \
	for i in `find $(ROOT_DIR) -name AUTHORS | sort` ; do \
	    echo $$i ; \
	    if [ $$f = 1 ] ; then \
	    	f=0 ; \
	    else \
	    	echo >>debian/AUTHORS ; \
		echo "------------------------------------------------------------------------" >>debian/AUTHORS ; \
	        dirname=`dirname $$i` ; \
	        echo `basename $$dirname` >>debian/AUTHORS ; \
		echo >>debian/AUTHORS ; \
	    fi ; \
	    cat $$i >>debian/AUTHORS ; \
	done
	#
	touch build-stamp

binary-indep: build-stamp docs-stamp
	dh_testdir
	dh_testroot
	dh_installdirs -i
	dh_install -i --sourcedir=$(TMPINSTALL_DIR)
	dh_lintian -i
	dh_installdocs -i -A debian/README.Debian debian/AUTHORS
	dh_installemacsen -i
	dh_installexamples -i
	dh_installchangelogs -i
	dh_installman -i
	dh_installmenu -i
	dh_link -i
	dh_strip -i
	dh_compress -i -X.txt -X.erl -X.hrl -X.c -X.js -X.kwc -X.pdf -X.eix -X.src -X.beam
	dh_fixperms -i
	dh_makeshlibs -i
	dh_installdeb -i
	dh_shlibdeps -i
	dh_gencontrol -i
	dh_md5sums -i
	dh_builddeb -i

binary-arch: $(BINARY_TARGETS)

binary-erlang-base: build-stamp
	dh_testdir
	dh_testroot
	dh_installdirs -a
	dh_install -perlang-base --sourcedir=debian/erlang-stnd
	dh_install -a -Nerlang-base --sourcedir=$(TMPINSTALL_DIR)
	#
	install -D -m 755 $(ROOT_DIR)/debian/scripts/erlang-depends \
		$(ROOT_DIR)/debian/erlang-dev/usr/bin/erlang-depends
	#
	dh_lintian -a
	dh_installdocs -a -A debian/README.Debian debian/AUTHORS
	dh_installchangelogs -a
	dh_installemacsen -a
	dh_installexamples -a
	dh_installman -a
	dh_installmenu -a
	dh_link -a
	dh_installsystemd -a --name=epmd
	dh_strip -a
	dh_compress -a
	dh_fixperms -a
	dh_makeshlibs -a
	dh_installdeb -a
	dh_shlibdeps -a
	dh_gencontrol -perlang-base -- \
		-Vlibsctp:Version='$(LIBSCTPDEP)'
	dh_gencontrol -a -Nerlang-base -- \
		-Verlang-base='$(ERLANGBASE)'
	dh_md5sums -a
	dh_builddeb -a

binary: binary-indep binary-arch

.PHONY: clean automake install build build-arch build-indep
.PHONY: binary binary-arch binary-indep
.PHONY: configure-stnd build-stnd install-stnd docs manpages
.PHONY: binary-erlang-base