#! /usr/bin/make -f

###--------------------------------------------------------------------------
### Preliminary definitions.

## The multiarch triple.
DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
a := $(DEB_HOST_MULTIARCH)

## My version number, shorn of the Debian package version if any.
DEB_UPSTREAM_VERSION ?= \
	$(shell dpkg-parsechangelog | \
		sed -n "/^Version: \([^-]*\)\(-.*\)\?/s//\1/p")
v := $(DEB_UPSTREAM_VERSION)

## Default Debhelper options.
DH_OPTIONS = --parallel

## Default Debhelper actions.
%:; dh $@ $(DH_OPTIONS)

###--------------------------------------------------------------------------
### Multiple flavours.

## The various flavours of the library which we must build.
FLAVOURS = noadns adns

## The build actions which we have to override.
DH_BUILD_OVERRIDES = configure clean build install test

## How to perform build action for a particular library flavour.
define flavour-build-action
dh_auto_$1 -Bdebian/build-$2 \
	$(addprefix -O, $(DH_OPTIONS)) $(DH_OPTIONS_$2) \
	$(DH_$1_OPTIONS) $(DH_$1_OPTIONS_$2)

endef

## Override the build actions, and perform the relevant action for each
## flavour in turn.
$(foreach t, $(DH_BUILD_OVERRIDES), dh-$t-hook):: %:; @:
$(foreach t, $(DH_BUILD_OVERRIDES), override_dh_auto_$t): \
		override_dh_auto_%: dh-%-hook
	$(foreach f, $(FLAVOURS), $(call flavour-build-action,$*,$f))

## Configuration options.
DH_configure_OPTIONS = -- --libexecdir='$${libdir}'
DH_configure_OPTIONS_noadns = --without-adns
DH_configure_OPTIONS_adns = --with-adns

## Cleaning options.
dh-clean-hook::
	rm -rf debian/tmp-adns

## Installation options.
DH_install_OPTIONS_adns = --destdir=debian/tmp-adns

###--------------------------------------------------------------------------
### Additional tweaks.

## Don't try to rebuild our configure script.
DH_OPTIONS += --without=autoreconf

## Some of the install lists need to be generated.  This is a little
## annoying.
GEN_INSTALL_PKGS = mlib2-adns
GEN_INSTALL_FILES = $(foreach p, $(GEN_INSTALL_PKGS), debian/$p.install)
$(GEN_INSTALL_FILES): debian/%.install: \
		debian/%.install.in debian/changelog debian/rules
	sed 's,@ARCH@,$a,g' $< >$@.new && mv $@.new $@
dh-install-hook:: $(GEN_INSTALL_FILES); @:
dh-clean-hook::
	rm -f $(GEN_INSTALL_FILES)

## Check that the shared-library symbols are plausible.
override_dh_makeshlibs:
	dh_makeshlibs -- -c4

###----- That's all, folks --------------------------------------------------