build: improve code coverage report by excluding irrelevant code

This removes system files from the report as well as test code.

Author: zmughal

.travis.yml

@@ -20,7 +20,7 @@ script:
   - make dep.test-data dep.external
   - make && make test
 after_success:
-  - if [ "$COVERAGE" = 1 ]; then coveralls -b . -i .build -i bin;  fi
+  - if [ "$COVERAGE" = 1 ]; then coveralls  -b . -i lib -e lib/t --gcov-options '\-r';  fi
 branches:
   except:
     - /^wip\//

make/devops-rules.mk

@@ -13,15 +13,15 @@ test.build-gcov:
 check-gcov-quick:
 	$(MAKE) .gcov-note
 	mkdir -p $(GCOVDIR)
-	find $(BINDIR) $(BUILDDIR) -name "*.gcda" \
+	find $(BINDIR) $(BUILDDIR) -path $(BUILDDIR)/t -prune -o -name "*.gcda" -print \
 		| xargs $(GCOV) --no-output --preserve-paths \
 		> $(GCOVDIR)/gcov-report
 	@echo "See gcov report in $(GCOVDIR)/gcov-report"
 check-gcov-full:
 	$(MAKE) .gcov-note
 	mkdir -p $(GCOVDIR)
-	find $(BINDIR) $(BUILDDIR) -name "*.gcda" \
-		| xargs $(GCOV) --preserve-paths
+	find $(BINDIR) $(BUILDDIR) -path $(BUILDDIR)/t -prune -o -name "*.gcda" -print \
+		| xargs $(GCOV) -r --preserve-paths
 	mv *.gcov $(GCOVDIR)
 check-lcov:
 	$(MAKE) .gcov-note