Add common app test coverage rules.

etc/app_cov.mk

@@ -0,0 +1,88 @@
+CUSTOM_EXEC=1
+
+TESTDIRS = $(TESTSRCS:.cxxtest=.covdir)
+
+# This target actually runs the test. We jump through some hoops to collect the
+# coverage files into a separate directory. Since they are in a separate directory, we need to put the original .gcno files there as well.
+%.testout : %.testmd5
+	mkdir -p $*.covdir
+	rm -f $*.covdir/app.info
+	lcov --directory $*.covdir/ -z
+	GCOV_PREFIX=$(abspath $*.covdir) GCOV_PREFIX_STRIP=$(shell echo $(realpath .) | tr -C -d '/' | wc -c) $(<:.testmd5=.test$(EXTENTION)) $(TESTARGS) --gtest_death_test_style=threadsafe
+	touch $@
+
+
+%.covdir/app.info : %.testout
+	cd $*.covdir/ ; \
+	for i in $$(find . -name \*.gcda) ; do \
+	  echo i $$i base $${i%%.gcda} ; \
+	  ln -sf $(realpath .)/$${i%%.gcda}.gcno $${i%%.gcda}.gcno ; \
+	done ; \
+	lcov --directory . --capture --output-file app.info ; \
+	rm -f $$(find . -name \*.gcno -type l)
+
+
+COVAGGRDIRS = $(dir $(TESTBINS))
+COVAGGRDIRS_UNIQ = $(shell echo $(COVAGGRDIRS) | tr ' ' '\n' | sort | uniq)
+COVAGGRFILES_DUP = $(foreach DIR,$(dir $(TESTBINS)),$(DIR)cov.info)
+COVAGGRFILES = $(shell echo $(COVAGGRFILES_DUP) | tr ' ' '\n' | sort | uniq)
+
+# Helper function for aggregating coverage files into per-directory templates.
+#
+# arg 1: a .testout file
+#
+# Adds the per-test coverage.info file to the dependencies to the directory's
+# coverage file.
+define TEST_TO_DIR_COV_template
+$(dir $(1))cov.info: $(1:.testout=.covdir/app.info)
+
+$(dir $(1))tests: $(1)
+endef
+
+# Calls the directory template for every .testout file we have.
+$(foreach testout,$(TESTOUTPUTS),$(eval $(call TEST_TO_DIR_COV_template,$(testout))))
+
+$(COVAGGRFILES):
+	rm -f $@
+	lcov --output-file $@ $(foreach F,$^, -a $F)
+
+cov: lcovdir/index.html
+
+lcovdir/index.html: $(TESTOUTPUTS) $(TESTMD5) $(COVAGGRFILES)
+	mkdir lcovdir ; \
+	rm lcovdir/app_base.info; \
+	lcov -c -i -d . -o lcovdir/app_base.info; \
+	cd lcovdir ; rm app.info; \
+	lcov --output-file app.info $(foreach F,$(COVAGGRFILES), -a ../$F) ; \
+	lcov -r app.info "/usr/include/*" "*.cxxtest" "*gtest*" "*gmock*" -o app.info; \
+	lcov -r app_base.info "/usr/include/*" "*.cxxtest" "*gtest*" "*gmock*" -o app_base.info; \
+	lcov -a app_base.info -a app.info -o app_total.info; \
+	genhtml -o . app_total.info
+
+# Helper function to create per-direcotry coverage summaries.
+#
+# arg 1: a directory name (basename, without anything, on trailing slash)
+define PER_DIR_COV_template
+$(1)cov: $(1)lcovdir/index.html
+
+$(1)lcovdir/index.html: $(1)cov.info
+	cd $(1) ; \
+	mkdir -p lcovdir ; \
+	cd lcovdir ; \
+	lcov -r ../../$$< "/usr/include/*" "*.cxxtest" "*gtest*" "*gmock*" -o app.info ; \
+	genhtml -o . app.info
+endef
+
+$(foreach dirname,$(COVAGGRDIRS_UNIQ),$(eval $(call PER_DIR_COV_template,$(dirname))))
+
+veryclean-cov:
+	rm -rf lcovdir/
+	rm -rf $(foreach dirname,$(COVAGGRDIRS_UNIQ),$(dirname)lcovdir/)
+
+
+veryclean: veryclean-cov clean-cov
+
+clean-cov:
+	rm -rf $(TESTDIRS) $(COVAGGRFILES)
+
+clean veryclean: clean-cov clean-gtest