#!/usr/bin/make -f

include /usr/share/dpkg/architecture.mk

MSHR_HOME = $(CURDIR)/$(DEB_SRCDIR)
USCAN_DESTDIR := $(CURDIR)
PY3VERS := $(shell py3versions --requested debian/control | tac -s' ')
PYVERS = $(PY3VERS)

DEB_VERSION := $(shell dpkg-parsechangelog | egrep '^Version:' | cut -f 2 -d ' ')
DEB_NOEPOCH_VERSION := $(shell echo $(DEB_VERSION) | cut -d: -f2-)
DEB_UPSTREAM_VERSION := $(shell echo $(DEB_NOEPOCH_VERSION) | sed 's/-[^-]*$$//')
DEB_STRIPPED_UPSTREAM_VERSION = $(shell echo $(DEB_UPSTREAM_VERSION) | sed -e 's/\+dfsg.*$$//p')

FENICS_RELEASE_VERSION=$(DEB_STRIPPED_UPSTREAM_VERSION)
FENICS_MAJOR_VERSION=$(shell echo $(FENICS_RELEASE_VERSION) | sed "s/^\([^.]*\)\..*$$/\1/")
FENICS_MINOR_VERSION=$(shell echo $(FENICS_RELEASE_VERSION) | sed "s/^\([^.]*\)\.\([^.]*\)\..*$$/\2/")
FENICS_VERSION=$(FENICS_MAJOR_VERSION).$(FENICS_MINOR_VERSION)
FENICS_NEXT_VERSION=$(FENICS_MAJOR_VERSION).$(shell echo $$(( $(FENICS_MINOR_VERSION) + 1 )) )

# dolfin depends on the pybind11 version it was built against,
# if pybind11.h will be used in C++ code fragments in python scripts.
# But pybind11 follows semantic versioning, so should have backwards compatibility
# with minor and patch version updates.
# Extract pybind11 version from pybind11-dev
PYBIND11_DEB_VERSION=$(shell dpkg -s pybind11-dev | awk '/Version:/ {print $$2}')
# extract the current pybind11 version X.Y.Z (drop epoch and debian package version)
PYBIND11_UPSTREAM_VERSION=$(shell echo $(PYBIND11_DEB_VERSION) | sed "s/^.[^:]*://; s/-[^-]*$$//")
PYBIND11_X_VERSION=$(shell echo $(PYBIND11_UPSTREAM_VERSION) | sed "s/^\([^.]*\).*/\1/")
PYBIND11_X_Y_VERSION=$(shell echo $(PYBIND11_UPSTREAM_VERSION) | sed "s/^\(.*\)\.\([^.]*\)$$/\1/")
PYBIND11_VERSION=$(PYBIND11_X_Y_VERSION)
PYBIND11_NEXT_VERSION=$(shell echo $$(( $(PYBIND11_X_VERSION) + 1 )) )

# extract PETSc version from petsc-dev
PETSC_DEB_VERSION=$(shell dpkg -s petsc-dev | awk '/Version:/ {print $2}')
# extract the current PETSc version
PETSC_UPSTREAM_VERSION=$(shell pkg-config --modversion PETSc)
# "Major" version is the first number in the upstream version (major.minor.release)
PETSC_MAJOR_VERSION=$(shell echo $(PETSC_UPSTREAM_VERSION) | sed "s/^\([^.]*\)\..*$$/\1/")
# "Minor" version is the second number in the upstream version (major.minor.release)
PETSC_MINOR_VERSION=$(shell echo $(PETSC_UPSTREAM_VERSION) | sed "s/^\([^.]*\)\.\([^.]*\)\..*$$/\2/")
PETSC_VERSION=$(PETSC_MAJOR_VERSION).$(PETSC_MINOR_VERSION)
PETSC_VERSION_NEXT=$(shell echo $(PETSC_MAJOR_VERSION).$$(($(PETSC_MINOR_VERSION)+1)))

SLEPC_UPSTREAM_VERSION=$(shell pkg-config --modversion SLEPc)
# SLEPc version must match PETSc
SLEPC_VERSION=$(PETSC_VERSION)
SLEPC_VERSION_NEXT=$(PETSC_VERSION_NEXT)

PETSC_DIR=/usr/lib/petscdir/petsc$(PETSC_VERSION)/$(DEB_HOST_MULTIARCH)-real
SLEPC_DIR=/usr/lib/slepcdir/slepc$(SLEPC_VERSION)/$(DEB_HOST_MULTIARCH)-real

PETSC64_DIR=/usr/lib/petscdir/petsc64-$(PETSC_VERSION)/$(DEB_HOST_MULTIARCH)-real
SLEPC64_DIR=/usr/lib/slepcdir/slepc64-$(SLEPC_VERSION)/$(DEB_HOST_MULTIARCH)-real

BUILDDIR = obj-$(DEB_HOST_GNU_TYPE)
BUILDDIR_64 = obj-$(DEB_HOST_GNU_TYPE)-64

MSHR_LIBDIR = /usr/lib/mshr
MSHR64_LIBDIR = /usr/lib/mshr64

# some arches (mostly 32 bit) don't provide enough memory to build with debug symbols
ARCH_NO_DEBUG_SYMBOLS := armhf i386 mips64el mipsel hppa m68k powerpc x32
ifeq ($(findstring $(DEB_BUILD_ARCH),$(ARCH_NO_DEBUG_SYMBOLS)),)
  MSHR_BUILDFLAGS := $(shell dpkg-buildflags --get CXXFLAGS )
else
# remove -g from build flags on weak arches
  MSHR_BUILDFLAGS := $(shell dpkg-buildflags --get CXXFLAGS | sed 's/-g //' )
endif

CMAKE_OPTS := \
	-D CMAKE_BUILD_TYPE:STRING=Release \
	-D BUILD_SHARED_LIBS:BOOL=ON \
	-D USE_SYSTEM_CGAL:BOOL=ON \
	-D USE_SYSTEM_TETGEN:BOOL=ON \
	-D ENABLE_MSHRABLE:BOOL=ON \
	-D CMAKE_SKIP_RPATH:BOOL=ON \
	-D CMAKE_INSTALL_RPATH_USE_LINK_PATH:BOOL=OFF \
	-D INSTALL_LIB_DIR:PATH=lib/$(DEB_BUILD_MULTIARCH) \
	-D CMAKE_CXX_FLAGS:STRING="-fpermissive $(MSHR_BUILDFLAGS)" \
	$(MSHR_HOME)

ifeq (,$(DISTRIBUTION))
	DISTRIBUTION := $(shell dpkg-parsechangelog --format rfc822 | sed -ne "s/^Distribution: //p")
endif

ifneq ($(DISTRIBUTION),$(findstring $(DISTRIBUTION),"squeeze wheezy lucid maverick natty oneiric precise quantal raring saucy trusty"))
	DISTRIBUTION := sid
endif

%:
	dh $@ --buildsystem=cmake \
	      --with python3 \
	      --no-parallel

override_dh_auto_clean:
	dh_auto_clean
	rm -rf python/build*
	rm -rf python/mshr.egg-info
	rm -rf debian/tmp64
	rm -rf $(BUILDDIR) $(BUILDDIR_64)

override_dh_auto_configure:
	PETSC_DIR=$(PETSC_DIR) SLEPC_DIR=$(SLEPC_DIR) dh_auto_configure --builddir=$(BUILDDIR) -- $(CMAKE_OPTS)
	PETSC_DIR=$(PETSC64_DIR) SLEPC_DIR=$(SLEPC64_DIR) dh_auto_configure --builddir=$(BUILDDIR_64) -- $(CMAKE_OPTS) -DLIB_NAME_EXT="64" -DDOLFIN_LIB_NAME_EXT="64"

override_dh_auto_build:
	PETSC_DIR=$(PETSC_DIR) SLEPC_DIR=$(SLEPC_DIR) dh_auto_build --builddir=$(BUILDDIR)
	PETSC_DIR=$(PETSC64_DIR) SLEPC_DIR=$(SLEPC64_DIR) dh_auto_build --builddir=$(BUILDDIR_64)

override_dh_auto_install:
	dh_auto_install --builddir=$(BUILDDIR) --destdir=debian/tmp
	dh_auto_install --builddir=$(BUILDDIR_64) --destdir=debian/tmp64
	set -e; \
	for v in $(PYVERS); do \
	   cd python; \
	   PETSC_DIR=$(PETSC_DIR) SLEPC_DIR=$(SLEPC_DIR) \
	   CMAKE_PREFIX_PATH=$(CURDIR)/debian/tmp/usr \
	   $$v setup.py build --build-base=$(CURDIR)/python/build-$$v install --root=$(CURDIR)/debian/tmp --install-layout=deb; \
	   PETSC_DIR=$(PETSC64_DIR) SLEPC_DIR=$(SLEPC64_DIR) \
	   CMAKE_PREFIX_PATH=$(CURDIR)/debian/tmp64/usr MSHR_LIB_NAME_EXT="64" DOLFIN_LIB_NAME_EXT="64" \
	   $$v setup.py build --build-base=$(CURDIR)/python/build64-$$v install --root=$(CURDIR)/debian/tmp64 --install-layout=deb; \
	   cd ..; \
	done
	dh_numpy3

override_dh_python3-arch:
	dh_python3 -a
	dh_numpy3 -a
	mkdir -p debian/python3-mshr-real/$(MSHR_LIBDIR)
	mv debian/python3-mshr-real/usr/lib/python3  debian/python3-mshr-real/$(MSHR_LIBDIR)
	mkdir -p debian/python3-mshr64-real/$(MSHR64_LIBDIR)
	mv debian/python3-mshr64-real/usr/lib/python3  debian/python3-mshr64-real/$(MSHR64_LIBDIR)

override_dh_gencontrol:
	dh_gencontrol -- -Vfenics:Upstream-Version=$(FENICS_VERSION) \
		-Vpybind11:Upstream-Version=$(PYBIND11_VERSION) -Vpybind11:Next-Upstream-Version=$(PYBIND11_NEXT_VERSION)

# debug symbols (-g) have been switched off in CMAKE_OPTS for some arches, so no point building dbgsym packages
override_dh_strip:
	case " $(ARCH_NO_DEBUG_SYMBOLS) " in \
	    *\ $(DEB_HOST_ARCH)\ *) dh_strip --no-automatic-dbgsym;; \
	    *) dh_strip;; \
	esac

override_dh_dwz:
	case " $(ARCH_NO_DEBUG_SYMBOLS) " in \
	    *\ $(DEB_HOST_ARCH)\ *) echo "skipping dh_dwz since debug symbols (-g) have been switched off for $(DEB_HOST_ARCH)";; \
	    *) dh_dwz;; \
	esac

#override_dh_shlibdeps:
#	dh_shlibdeps --dpkg-shlibdeps-params=--ignore-missing-info

.PHONY: get-orig-source
get-orig-source:
	uscan --force-download --verbose --destdir $(USCAN_DESTDIR)