#!/usr/bin/make -f

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

# Debian package major.minor version
VER = $(shell dpkg-parsechangelog -Sversion | sed -r 's/([0-9]+\.[0-9]+)(\..*)/\1/')

# Closest upstream VCS tag, used to generate debian/control and DH files
VCS_VER = $(shell git describe --abbrev=0 --match="v*" 2>/dev/null | sed -r 's/v([0-9]+\.[0-9]+)(\..*)/\1/')

GNT_USERGROUP_PREFIX="gnt-"

GHC_FLAGS = -optl -Wl,-z,relro -optl -Wl,--as-needed

# Architectures with GHC DWARF support (as of GHC 8.2)
# Temporarily disabled for GHC 8.2
#GHC_SUPPORTED_DWARF_ARCHS = amd64 i386

ifneq (,$(filter $(DEB_HOST_ARCH), $(GHC_SUPPORTED_DWARF_ARCHS)))
	GHC_FLAGS += -g
endif

%:
	dh $@ --with python3,sphinxdoc,bash_completion

ifeq ($(VCS_VER),)
debian/control:
	$(error Empty VCS version, the target must be run within the packaging git repository)
else
debian/control: debian/control.in
	for package in ganeti-haskell-$(VCS_VER) ganeti-htools-$(VCS_VER) ganeti-$(VCS_VER); do \
		for file in debian/templates/versioned.*; do \
			kind="$$(echo $$file | sed -r 's#.*\.(.*)#\1#')"; \
			sed -e "s/@package@/$$package/g" \
			    -e 's/@version@/$(VCS_VER)/g' \
			    "$$file" > "debian/$${package}.$${kind}"; \
		done; \
	done
	
	for file in debian/templates/*-VER*; do \
		fname="$$(echo $$file | sed -e 's#VER#$(VCS_VER)#' -e 's#templates/##')"; \
		sed -e 's/@version@/$(VCS_VER)/g' $$file >"$$fname"; \
	done
	
	sed -s 's/#VER#/$(VCS_VER)/g' debian/control.in > debian/control
endif

clean: debian/control
	dh clean --with python3,sphinxdoc,bash_completion,autoreconf

override_dh_autoreconf:
	dh_autoreconf $(CURDIR)/autogen.sh

override_dh_auto_configure:
	dpkg-parsechangelog -Sversion > vcs-version
	./configure \
	  IP_PATH=/bin/ip \
	  --prefix=/usr \
	  --localstatedir=/var \
	  --sysconfdir=/etc \
	  --with-export-dir=/var/lib/ganeti/export \
	  --with-iallocator-search-path=/usr/local/lib/ganeti/iallocators,/usr/lib/ganeti/iallocators \
	  --with-os-search-path=/srv/ganeti/os,/usr/local/lib/ganeti/os,/usr/lib/ganeti/os,/usr/share/ganeti/os \
	  --with-extstorage-search-path=/srv/ganeti/extstorage,/usr/local/lib/ganeti/extstorage,/usr/lib/ganeti/extstorage,/usr/share/ganeti/extstorage \
	  --docdir=/usr/share/doc/ganeti \
	  --enable-restricted-commands \
	  --disable-symlinks \
	  --with-haskell-flags="$(GHC_FLAGS)" \
	  --with-user-prefix=$(GNT_USERGROUP_PREFIX) \
	  --with-group-prefix=$(GNT_USERGROUP_PREFIX) \
	  --with-ssh-initscript="/usr/sbin/invoke-rc.d ssh" \
	  --with-backup-dir="/var/backups"

override_dh_auto_clean:
	[ ! -f Makefile ] || $(MAKE) distclean
	# this is not removed by make distclean :(
	rm -f ganeti

	rm -f debian/ganeti.init
	rm -f debian/ganeti.cron.d
	rm -f debian/ganeti.default
	rm -f debian/ganeti.postinst
	rm -f debian/ganeti.postrm
	rm -f vcs-version
	dh_auto_clean

override_dh_auto_build:
	dh_auto_build

	# Generate postinst and postrm scripts
	$(CURDIR)/debian/genscript.py postinst "$(CURDIR)" | \
		sed -f "$(CURDIR)/autotools/replace_vars.sed" \
		    -e "s#@VER@#$(VER)#g" >"$(CURDIR)/debian/ganeti.postinst"
	$(CURDIR)/debian/genscript.py postrm "$(CURDIR)" >"$(CURDIR)/debian/ganeti.postrm"
	make -f $(CURDIR)/debian/helper.make install-tests

override_dh_install-indep:
	dh_install -pganeti-$(VER) -Xsbin/ganeti-confd -Xganeti/mon-collector \
		-Xganeti/default -Xbin/h -Xman1/h -Xsbin/ganeti-mond -Xsbin/ganeti-luxid -Xhail
	dh_install -i -Nganeti-$(VER) -Xganeti/$(VER)

	cp $(CURDIR)/doc/examples/ganeti.initd $(CURDIR)/debian/ganeti.init
	cp $(CURDIR)/doc/examples/ganeti.cron $(CURDIR)/debian/ganeti.cron.d
	sed -e 's/^RAPI_ARGS=.*/RAPI_ARGS="-b 127.0.0.1 --require-authentication"/' \
		$(CURDIR)/doc/examples/ganeti.default > $(CURDIR)/debian/ganeti.default

	# Dummy Python module for the RAPI client
	# Add missing bits to ganeti and python-ganeti-rapi.
	# Python 3
	cp $(CURDIR)/debian/tmp/usr/share/ganeti/$(VER)/ganeti/rapi/client.py \
	   $(CURDIR)/debian/python3-ganeti-rapi/usr/lib/python3/dist-packages/ganeti/rapi/
	touch $(CURDIR)/debian/python3-ganeti-rapi/usr/lib/python3/dist-packages/ganeti/__init__.py
	touch $(CURDIR)/debian/python3-ganeti-rapi/usr/lib/python3/dist-packages/ganeti/rapi/__init__.py
	
override_dh_python3:
	dh_python3

	# /usr/share/ganeti/<VER> is not in the default search path of dh_python2
	dh_python3 -pganeti-$(VER) usr/share/ganeti/$(VER)

override_dh_missing:
	dh_missing

override_dh_installinit:
	dh_installinit --error-handler=true --no-stop-on-upgrade -i -- defaults 20 80

override_dh_compress:
	dh_compress

	# Compress version-specific manpages, not automatically detected by dh_compress
	for package in ganeti-$(VER) ganeti-htools-$(VER); do \
		(cd $(CURDIR)/debian/$$package && \
			find usr/share/ganeti/$(VER)/root/usr/share/man -type f) | \
			xargs dh_compress -p$$package; \
	done

	# Fix the symlinks under /usr/share/man to point to the compressed
	# files. The symlinks are shipped in the ganeti package, and because
	# they are indirect links through /etc, they would not be detected by
	# dh_compress anyway.
	for file in $$(find $(CURDIR)/debian/ganeti/usr/share/man \
			    $(CURDIR)/debian/ganeti-htools/usr/share/man \
			    -type l); do \
		target=$$(readlink "$$file"); \
		rm "$$file"; \
		ln -sf "$${target}.gz" "$${file}.gz"; \
	done

override_dh_link:
	# Fix the links in ganeti-htools to refer directly to the version at hand
	for file in $$(find $(CURDIR)/debian/ganeti-htools/usr -type l); do \
		target="$$(readlink "$$file" | sed -r -e 's#/usr/(lib|share)/ganeti/default/#/usr/\1/ganeti/$(VER)/#')"; \
		ln -sf "$$target" "$$file"; \
	done

	# Now let dh_link fix all symlinks
	dh_link
	
	# Make bash completion autoloadable
	for script in $$(grep ^complete $(CURDIR)/debian/ganeti/usr/share/bash-completion/completions/ganeti \
		| awk '/ +[a-z_-]+$$/ { print $$NF }') ; do \
		dh_link -pganeti "usr/share/bash-completion/completions/ganeti" \
			         "usr/share/bash-completion/completions/$$script" ; \
	done

# Disable dh_sphinxdoc for binary-arch, as it will raise an error
override_dh_sphinxdoc-arch:

# Disable the test suite, as it requires the daemon users to be present
# at build time.
override_dh_auto_test:

ifeq (,$(filter $(DEB_HOST_ARCH), $(GHC_SUPPORTED_DWARF_ARCHS)))
# Skip creating dbgsym packages, as they contain no useful information
override_dh_strip:
	dh_strip --no-automatic-dbgsym

.PHONY: override_dh_strip
endif

.PHONY: override_dh_auto_configure override_dh_auto_clean override_dh_auto_build \
	override_dh_installinit override_dh_install-indep override_dh_sphinxdoc-arch \
	override_dh_auto_test override_dh_compress override_dh_python3 \
	override_dh_link genfiles override_dh_autoreconf check-vcs-version \
	override_dh_missing