#!/usr/bin/make -f

# resolve DEB_HOST_ARCH
include /usr/share/dpkg/architecture.mk

export DEB_BUILD_MAINT_OPTIONS = hardening=+all
export DEB_CFLAGS_MAINT_APPEND  = -Wall -pedantic
export DEB_CXXFLAGS_MAINT_APPEND  = -Wall -pedantic

# trust upstream optimization level unless explicitly disabled
ifeq (,$(filter noopt,$(DEB_BUILD_OPTIONS)))
export DEB_CFLAGS_MAINT_STRIP=-O2
export DEB_CXXFLAGS_MAINT_STRIP=-O2
endif

# reduce risk of out-of-memory issues during build for weak arches
ifneq (,$(filter $(DEB_HOST_ARCH),armel armhf i386 mipsel riscv64))
export RUSTFLAGS += -C embed-bitcode=no -C lto=no -C linker-plugin-lto=no
endif

# build binary sccache-dist on supported arches
ifneq (,$(filter $(DEB_HOST_ARCH),amd64))
ENABLE_DIST_SERVER = 1
CARGO_EXTRA_ARGS = --features dist-server
endif

# generate documentation unless nodoc requested
ifeq (,$(filter nodoc,$(DEB_BUILD_OPTIONS)))
MANPAGES = debian/sccache.1
ifneq (,$(ENABLE_DIST_SERVER))
MANPAGES += debian/sccache-dist.1
endif
endif

# Fails with error: Error executing cache write: Cannot write to read-only storage
TEST_READONLY = \
 test_rust_cargo_cmd_readonly_preemtive_block

# Fails with error: Couldn't open config file
TEST_NO_CONFIG = \
 test_gcp_arg_check \
 test_s3_invalid_args

%:
	dh $@

ifneq (,$(ENABLE_DIST_SERVER))
override_dh_auto_build:
	dh_auto_build --buildsystem rust -- $(CARGO_EXTRA_ARGS)
endif

# ensure ccache is not in use during tests
# avoid optimization to not run out of memory
override_dh_auto_test:
	PATH=/usr/sbin:/usr/bin:/sbin:/bin TMPDIR=$(CURDIR)/debian DEB_BUILD_OPTIONS=noopt dh_auto_test --buildsystem rust -- \
	 $(CARGO_EXTRA_ARGS) \
	 --no-fail-fast -- $(addprefix --skip ,$(TEST_READONLY) $(TEST_NO_CONFIG))

ifneq (,$(ENABLE_DIST_SERVER))
override_dh_auto_install:
	dh_auto_install --buildsystem rust -- $(CARGO_EXTRA_ARGS)
endif

execute_after_dh_auto_install: $(MANPAGES)
	sed -e 's/%DEB_HOST_MULTIARCH%/$(DEB_HOST_MULTIARCH)/' \
	 debian/update-sccache-symlinks.in \
	 > debian/update-sccache-symlinks

# build manpages
debian/sccache.1: debian/%.1: debian/sccache/usr/bin/%
	help2man --section 1 --no-info \
		--name "a fast C/C++/Rust compiler cache" \
		--output $@ $< \
		|| { $< --help; false; }

ifneq (,$(ENABLE_DIST_SERVER))
debian/sccache-dist.1: debian/%.1: debian/sccache/usr/bin/%
	help2man --section 1 --no-info \
		--name "daemon for a fast C/C++/Rust compiler cache" \
		--output $@ $< \
		|| { $< --help; false; }
endif