#!/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)

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
-include $(ROOT_DIR)/lib/observer/vsn.mk
-include $(ROOT_DIR)/lib/edoc/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

MAN_DIR = $(ROOT_DIR)/debian/tmp/usr/share/man/man1

ifneq ($(findstring hurd,$(DEB_HOST_ARCH)),)
ESOCKET_OPT=--disable-esock
else
ESOCKET_OPT=--enable-esock
endif

ifneq ($(findstring hurd,$(DEB_HOST_ARCH)),)
KERNEL_POLL_OPT=--disable-kernel-poll
else
KERNEL_POLL_OPT=--enable-kernel-poll
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)!')

ifeq ($(findstring hurd,$(DEB_HOST_ARCH))$(findstring bsd,$(DEB_HOST_ARCH)),)
CLOCK_GETTIME_OPT=--enable-clock-gettime
SYSTEMD_OPT=--enable-systemd
SCTP_OPT=--enable-sctp
else
CLOCK_GETTIME_OPT=
SYSTEMD_OPT=
SCTP_OPT=--disable-sctp
endif

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

ifeq ($(findstring armel,$(DEB_HOST_ARCH)),)
OPTIMIZATION=-O2
else
OPTIMIZATION=-O1
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=$(shell nproc)

MANPAGE_DIRS = $(shell find $(ROOT_DIR) -not \( -wholename '*/.pc' -prune \) \
	       			-a \( -name '*_cmd.md' -or -name dialyzer.erl \) -exec dirname {} _cmd.md \; | tr "\n" ":")
MANPAGE_NAMES = $(shell find $(ROOT_DIR) -not \( -wholename '*/.pc' -prune \) \
				-a -name '*_cmd.md' -exec basename {} _cmd.md \;) dialyzer start_embedded
MANPAGES = $(MANPAGE_NAMES:%=$(MAN_DIR)/%.1)

vpath %_cmd.md $(MANPAGE_DIRS)

# manpages builds section 1 manual pages

manpages: manpages-stamp
manpages-stamp: $(MANPAGES)
	dh_testdir
	touch manpages-stamp

$(MAN_DIR):
	install -d $(MAN_DIR)

$(MAN_DIR)/start_embedded.1: $(MAN_DIR)/start.1
	sed -e's/START/START_EMBEDDED/' \
	    -e's/Bstart\([ \\]\)/Bstart_embedded\1/' <$< >$@

$(MAN_DIR)/dialyzer.1: lib/dialyzer/src/dialyzer.erl $(MAN_DIR)
	debian/scripts/fixmanpage $< 1 | ronn | sed -e's/start(1)/start_embedded(1)/' >$@

$(MAN_DIR)/%.1: %_cmd.md $(MAN_DIR)
	debian/scripts/fixmanpage $< 1 | ronn | sed -e's/start(1)/start_embedded(1)/' >$@

# Files generated from templates

SCRIPTS_SRC = $(wildcard debian/erlang-*.in) $(wildcard debian/scripts/*.in)
SCRIPTS = $(SCRIPTS_SRC:%.in=%)

$(SCRIPTS) debian/control: %: %.in debian/rules
	sed -e's/@VERSION@/$(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@/$(DIAMETER_VSN)/g' \
	    -e's/@OBSERVER_VSN@/$(OBSERVER_VSN)/g' \
	    -e's/@EDOC_VSN@/$(EDOC_VSN)/g' \
	    -e's/@TOOLS_VSN@/$(TOOLS_VSN)/g' <$< >$@

# Building the package

clean:
	dh_testdir
	dh_testroot
	#
	[ ! -f Makefile ] || $(MAKE) -j $(JOBS) clean
	#
	# Remove installed erlang from debian/
	rm -rvf debian/erlang-docs
	#
	# Restore replaced configure, config.guess, and config.sub files
	for i in `find $(ROOT_DIR) -regex '.*config\(ure\|\.guess\|\.sub\)~'` ; do \
	    mv -v $$i $${i%%\~} ; \
	done
	#
	# Remove files, which were generated from templates
	rm -vf $(SCRIPTS)
	#
	# *.install were also generated on-the-fly
	rm -vf debian/*.install
	rm -vf debian/erlang-doc.links
	#
	rm -vf debian/AUTHORS
	#
	# Remove touched stamp files
	rm -vf *-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 -vf $$i $$i~ ; \
	done
	#
	# Replace config.guess and config.sub by installed in /usr/share/misc.
	for i in `find $(ROOT_DIR) -not \( -wholename '*/.pc' -prune \) \
				    -a -name 'config.guess'` ; do \
	    cp -vfb /usr/share/misc/config.guess $$i ; \
	done
	for i in `find $(ROOT_DIR) -not \( -wholename '*/.pc' -prune \) \
				    -a -name 'config.sub'` ; do \
	    cp -vfb /usr/share/misc/config.sub $$i ; \
	done
	#
	# Regenerate configure scripts using autoconf
	./otp_build update_configure --no-commit
	#
	touch automake-stamp

configure: configure-stamp
configure-stamp: automake-stamp
	dh_testdir
	#
	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 \
		    --enable-threads \
		    --enable-smp-support \
		    $(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-stamp

boot: boot-stamp
boot-stamp: configure-stamp
	dh_testdir
	$(MAKE) -j $(JOBS) TYPE=$(TYPE) GEN_OPT_FLGS="$(GEN_OPT_FLGS)" JAVA_OPTIONS="$(JAVA_OPTIONS)"
	touch boot-stamp

install: install-stamp
install-stamp: boot-stamp
	dh_testdir
	#
	$(MAKE) -j $(JOBS) DESTDIR=$(ROOT_DIR)/debian/tmp TYPE=$(TYPE) install
	#
	# Replace ROOTDIR in "erl" and "start" scripts for real rootdir
	# If there's no erl or start then it's better to fail than silently continue
	for dir in debian/tmp/usr/lib/erlang/erts-$(VSN)/bin \
		   debian/tmp/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!' \
	    debian/tmp/usr/lib/erlang/releases/RELEASES.src \
	    >debian/tmp/usr/lib/erlang/releases/RELEASES
	#
	# Get rid of windows cruft
	find debian/tmp -name *.bat -exec rm -v {} \;
	#
	# Fix permissions
	cp debian/tmp/usr/lib/erlang/erts-$(VSN)/bin/start_erl.src \
	   debian/tmp/usr/lib/erlang/erts-$(VSN)/bin/start_erl
	chmod 755 debian/tmp/usr/lib/erlang/erts-$(VSN)/bin/start_erl
	chmod 755 debian/tmp/usr/lib/erlang/erts-$(VSN)/bin/*.src
	chmod 644 debian/tmp/usr/lib/erlang/bin/start.script
	chmod 644 debian/tmp/usr/lib/erlang/lib/wx-*/examples/*/*.beam
	#
	# Remove some files which should be rather in erlang-doc-html package
	find debian/tmp/usr/lib/erlang/lib -name info -exec rm -v {} \;
	rm -rv debian/tmp/usr/lib/erlang/erts-$(VSN)/doc
	#
	# Remove unnecessary Install and manpage formatting scripts
	rm -v debian/tmp/usr/lib/erlang/Install
	rm -rv debian/tmp/usr/lib/erlang/misc
	touch install-stamp

docs: docs-stamp
docs-stamp:
	dh_testdir
ifeq ($(filter nodoc,$(DEB_BUILD_PROFILES)),)
	PATH=$(ROOT_DIR)/bin:$$PATH $(MAKE) -j $(JOBS) docs
	$(MAKE) -j $(JOBS) DESTDIR=$(ROOT_DIR)/debian/erlang-docs install-docs
	#
	(cd $(ROOT_DIR)/debian/erlang-docs/usr/lib/erlang/lib ; \
	 perl $(ROOT_DIR)/debian/scripts/genlinks $(VSN) >$(ROOT_DIR)/debian/erlang-doc.links)
	install -d $(ROOT_DIR)/debian/erlang-docs/usr/lib/html
	mv $(ROOT_DIR)/debian/erlang-docs/usr/lib/erlang/* $(ROOT_DIR)/debian/erlang-docs/usr/lib/html
	# Use system-wide javascript libraries
	ln -sf /usr/share/javascript/jquery/jquery.min.js \
		$(ROOT_DIR)/debian/erlang-docs/usr/lib/html/lib/jinterface-*/doc/html/assets/java/script-dir/jquery-[0-9]*.min.js
	ln -sf /usr/share/javascript/jquery-ui/themes/base/jquery-ui.min.css \
		$(ROOT_DIR)/debian/erlang-docs/usr/lib/html/lib/jinterface-*/doc/html/assets/java/script-dir/jquery-ui.min.css
	ln -sf /usr/share/javascript/jquery-ui/jquery-ui.min.js \
		$(ROOT_DIR)/debian/erlang-docs/usr/lib/html/lib/jinterface-*/doc/html/assets/java/script-dir/jquery-ui.min.js
endif
	touch docs-stamp

build: build-arch build-indep

build-arch: build-stamp manpages-stamp
build-indep: build-stamp docs-stamp

build-stamp: install-stamp $(SCRIPTS)
	dh_testdir
	#
	# Place each installed file into the proper package.
	# See this script and the debian/patterns/* files for more informations.
	sh debian/scripts/analyse debian/tmp
	#
	# Add all author lists to debian/AUTHORS
	cat $(ROOT_DIR)/erts/AUTHORS >>debian/AUTHORS
	for i in $$(find $(ROOT_DIR) -name AUTHORS | sort | tail -n +3) ; do \
	    echo $$i ; \
	    echo "" >>debian/AUTHORS ; \
	    echo "------------------------------------------------------------------------" >>debian/AUTHORS ; \
	    echo "$$(basename $$(dirname $$i))" >>debian/AUTHORS ; \
	    echo "" >>debian/AUTHORS ; \
	    cat $$i >>debian/AUTHORS ; \
	done
	#
	touch build-stamp

binary: binary-indep binary-arch

binary-indep: build-stamp docs-stamp
	dh_testdir
	dh_testroot
	dh_installdirs -i
	dh_install -i
	dh_lintian -i
ifeq ($(filter nodoc,$(DEB_BUILD_PROFILES)),)
	dh_installdocs -i -A debian/README.Debian debian/AUTHORS
else
	dh_installdocs -i -Nerlang-doc -A debian/README.Debian debian/AUTHORS
endif
	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 -X.md
	dh_fixperms -i
	dh_makeshlibs -i
	dh_installdeb -i
	dh_shlibdeps -i
	dh_gencontrol -i
	dh_md5sums -i
	dh_builddeb -i

binary-arch: build-stamp manpages-stamp
	dh_testdir
	dh_testroot
	dh_installdirs -a
	dh_install -a
	#
	#sed -i -e 's/Depends: /Depends: $${erlang:Depends}, /g' debian/control
	#$(ROOT_DIR)/debian/erlang-dev/usr/bin/erlang-depends -a
	#grep -r erlang:Depends debian/
	#false
	#
	dh_lintian -a
	dh_installdocs -a -A debian/README.Debian debian/AUTHORS
	dh_installchangelogs -a
	dh_installemacsen -a
	dh_installexamples -a
	dh_installman -a
	dh_installmenu -a
	dh_link -a
	dh_installsystemd -a --name=epmd
	dh_strip -a
	dh_compress -a
	dh_fixperms -a
	dh_makeshlibs -a
	dh_installdeb -a
	dh_shlibdeps -a
	dh_gencontrol -a -- -Vlibsctp:Version='$(LIBSCTPDEP)'
	dh_md5sums -a
	dh_builddeb -a

.PHONY: clean automake build build-arch build-indep
.PHONY: binary binary-arch binary-indep
.PHONY: configure boot install docs manpages