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# Measure code coverage using luacov and gcov
# C and Lua code is measured separately and resutls are combined together
# Define COVERAGE=1 during build *and* test runs to enable measurement.
#
# Beware: Tests are typically run in parallel and neither luacov not gcov
# support that, so we have to store results from each run separatelly
# and combine them.
coverage-c-combine-gcda:
@# combine trees of gcda files into one info file per tree
@mkdir -p '$(COVERAGE_STATSDIR)/tmp.c'
@LCOV=$(LCOV) ./scripts/coverage_c_combine.sh '$(TOPSRCDIR)' '$(COVERAGE_STATSDIR)' '$(COVERAGE_STATSDIR)/tmp.c'
coverage-c: coverage-c-combine-gcda
@# combine info files for each tree into resulting c.info file
@$(LCOV) -q $(addprefix --add-tracefile ,$(wildcard $(COVERAGE_STATSDIR)/tmp.c/*.info)) --output-file '$(COVERAGE_STAGE).c.info'
@$(RM) -r '$(COVERAGE_STATSDIR)/tmp.c'
LUA_STATS_OUT := $(shell find '$(COVERAGE_STATSDIR)' -type f -name 'luacov.stats.out' 2> /dev/null)
LUA_INFOS_OUT := $(patsubst %.stats.out,%.lua.info,$(LUA_STATS_OUT))
coverage-lua-fix-paths: $(LUA_STATS_OUT)
@# map Lua install paths to source paths
@$(MAKE) PREFIX=$(PREFIX) install --dry-run --always-make | scripts/map_install_src.lua --sed > .luacov_path_map
@sed -i -f .luacov_path_map $^
@$(RM) .luacov_path_map
luacov.empty_stats.out:
@# generate list of all Lua files to fill holes in luacov stats
@$(MAKE) PREFIX=$(PREFIX) install --dry-run --always-make | scripts/map_install_src.lua | cut -f 2 | grep '\.lua$$' | scripts/luacov_gen_empty.sh > luacov.empty_stats.out
%.lua.info: %.stats.out coverage-lua-fix-paths
@scripts/luacov_to_info.lua $*.stats.out > $@
coverage-lua: $(LUA_INFOS_OUT) luacov.empty_stats.out
@echo '# Lua coverage in $(COVERAGE_STAGE).lua.info'
@# add missing files to luacov stats
@scripts/luacov_to_info.lua luacov.empty_stats.out > luacov.empty_stats.lua.info
@# combine info files for each tree into resulting lua.info file
@$(LCOV) -q $(addprefix --add-tracefile ,$(LUA_INFOS_OUT)) --add-tracefile luacov.empty_stats.lua.info --output-file '$(COVERAGE_STAGE).lua.info'
@$(RM) luacov.empty_stats.out luacov.empty_stats.lua.info
coverage:
@$(LCOV) $(addprefix --add-tracefile ,$(wildcard $(COVERAGE_STAGE)*.info)) --output-file coverage.info
@$(GENHTML) --no-function-coverage --no-branch-coverage -q -o coverage -p '$(realpath $(CURDIR))' -t 'Knot Resolver $(VERSION)-$(PLATFORM) coverage report' --legend coverage.info
coverage-clean:
@$(RM) -rf '$(COVERAGE_STATSDIR)'
.PHONY: coverage-c-combine-gcda coverage-c coverage-lua-fix-paths coverage-lua coverage coverage-clean
# Options
ifdef COVERAGE
BUILD_CFLAGS += --coverage
endif
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