#!/usr/bin/make -f

include /usr/share/dpkg/pkg-info.mk

# Do not build with link-time optimization, cf. https://bugs.debian.org/1034873
export DEB_BUILD_MAINT_OPTIONS := optimize=-lto

export DEB_CXXFLAGS_MAINT_APPEND := $(shell dpkg-buildflags --get CPPFLAGS)
export DEB_CFLAGS_MAINT_APPEND := $(shell dpkg-buildflags --get CPPFLAGS)
export DEB_LDFLAGS_MAINT_APPEND := -Wl,--as-needed


BUILD_DATE = $(shell LC_ALL=C date -u "+%B %d, %Y" -d "@$(SOURCE_DATE_EPOCH)")


BUILD_FLAGS_FILE = build-flags.cmake
set_build_flag = echo 'set($(1) $(2) CACHE \
    $(if $(filter $(2),YES ON TRUE NO OFF FALSE),BOOL,STRING) \
    $(or $(3),"") FORCE)' >> $(BUILD_FLAGS_FILE)
verify_build_flag = @grep \
    --include=CMakeLists.txt --include=*.cmake \
    --exclude=$(BUILD_FLAGS_FILE) -rqs '\b$(1)\b' . || echo '$(1) flag is obsolete'

$(BUILD_FLAGS_FILE) verify-build-flags:
	$(call $(flag_action),CMAKE_SKIP_RPATH,ON,"Skip rpath")
	$(call $(flag_action),CMAKE_USE_RELATIVE_PATHS,ON,"Use relative paths")
	$(call $(flag_action),CMAKE_VERBOSE_MAKEFILE,ON,"Verbose build")
	$(call $(flag_action),CMAKE_C_FLAGS,"$(CFLAGS)","C flags")
	$(call $(flag_action),CMAKE_CXX_FLAGS,"$(CXXFLAGS)","C++ flags")
	$(call $(flag_action),CMAKE_SKIP_BOOTSTRAP_TEST,ON,"Skip BootstrapTest")
ifeq (,$(filter pkg.cmake.bootstrap pkg.cmake.nogui,$(DEB_BUILD_PROFILES)))
	$(call $(flag_action),BUILD_CursesDialog,ON,"Build curses GUI")
	$(call $(flag_action),BUILD_QtDialog,ON,"Build Qt GUI")
endif
ifeq ($(DEB_HOST_ARCH_OS),hurd)
	$(call $(flag_action),CMAKE_USE_LIBUV,0,"Do not use libuv")
endif
#	$(call $(flag_action),BUILD_DOCUMENTATION,ON)

$(BUILD_FLAGS_FILE): flag_action := set_build_flag
verify-build-flags: flag_action := verify_build_flag
.PHONY: verify-build-flags

BOOTSTRAP_FLAGS = --prefix=/usr --docdir=/share/doc/cmake-data --mandir=/share/man \
                  --sphinx-man --sphinx-html --sphinx-flags="-D today=\"$(BUILD_DATE)\"" \
                  --init=../$(BUILD_FLAGS_FILE) --verbose

CROSS_CMAKE_FLAGS = -C../$(BUILD_FLAGS_FILE) \
                    -DCMAKE_DOC_DIR=share/doc/cmake-data \
                    -DCMAKE_MAN_DIR=share/man \
                    -DSPHINX_HTML=ON -DSPHINX_MAN=ON \
                    -DSPHINX_FLAGS="-D today=\"$(BUILD_DATE)\""

ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    BOOTSTRAP_FLAGS += --parallel=$(NUMJOBS)
else
    NUMJOBS = 1
endif
ifeq (,$(filter pkg.cmake.bootstrap,$(DEB_BUILD_PROFILES)))
    BOOTSTRAP_FLAGS += --system-libs
    CROSS_CMAKE_FLAGS += -DCMAKE_USE_SYSTEM_LIBRARIES=ON
endif

override_dh_auto_configure: $(BUILD_FLAGS_FILE)
ifeq (,$(filter cross,$(DEB_BUILD_PROFILES)))
	rm -rf Build && mkdir -p Build
	cd Build && ../bootstrap $(BOOTSTRAP_FLAGS)
else
	dh_auto_configure --buildsystem=cmake --builddirectory=Build -- \
		$(CROSS_CMAKE_FLAGS)
endif

ifeq ($(DEB_HOST_ARCH_OS),kfreebsd)
    # Workaround for Bug #815231: skip spuriously failing tests
    EXCLUDED_TESTS = CTestTestUpload\|curl\|kwsys.testSystemTools\|BuildDepends\|RunCMake.Configure
else
    EXCLUDED_TESTS = CTestTestUpload\|curl
endif

override_dh_auto_test:
	# Pass -j1 to "make test" as a workaround, see https://gitlab.kitware.com/cmake/cmake/issues/17165
	# The tests are still run in parallel as -jX is passed via ARGS to ctest.
	dh_auto_test --buildsystem=cmake -- -j1 ARGS="-E $(EXCLUDED_TESTS) --timeout 5000 -j$(NUMJOBS)"

execute_after_dh_auto_clean:
	rm -f $(BUILD_FLAGS_FILE)

override_dh_installdocs-arch:
	# dh_installdocs --link-doc generates binNMU unsafe deps (Bug #747141)
	dh_installdocs

override_dh_installdocs-indep:
	dh_installdocs --link-doc=cmake-data

override_dh_sphinxdoc:
	dh_sphinxdoc -pcmake-doc

%:
	dh $@ --builddirectory=Build