From b93d786ba481f09aa56e4666b378c6ac66d6850d Mon Sep 17 00:00:00 2001
From: Allan LeSage <allanlesage@gmail.com>
Date: Tue, 6 Dec 2011 19:04:27 -0600
Subject: Added coverage reporting via gcov config and targets.

---
 Makefile.am  | 38 ++++++++++++++++++++++++++++
 configure.ac | 11 ++++++++
 m4/gcov.m4   | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 m4/gcov.m4

diff --git a/Makefile.am b/Makefile.am
index 0d4d34b..fbd9e6b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,12 +20,14 @@ libpower_la_SOURCES = \
 libpower_la_CFLAGS = \
         $(UPOWER_CFLAGS) \
         $(INDICATOR_CFLAGS) \
+		$(COVERAGE_CFLAGS) \
         -Wall -Werror \
         -DG_LOG_DOMAIN=\"Indicator-Power\"
 libpower_la_LIBADD = \
         $(UPOWER_LIBS) \
         $(INDICATOR_LIBS)
 libpower_la_LDFLAGS = \
+		$(COVERAGE_LDFLAGS) \
         -module \
         -avoid-version
 
@@ -73,3 +75,39 @@ dist-hook:
         else \
 			echo Failed to generate AUTHORS: not a branch >&2; \
 	fi
+
+
+# Coverage targets
+
+.PHONY: clean-gcda
+clean-gcda:
+	@echo Removing old coverage results
+	-find -name '*.gcda' -print | xargs -r rm
+
+.PHONY: coverage-html generate-coverage-html clean-coverage-html
+coverage-html: clean-gcda
+	-$(MAKE) $(AM_MAKEFLAGS) -k check
+	$(MAKE) $(AM_MAKEFLAGS) generate-coverage-html
+
+generate-coverage-html:
+	@echo Collecting coverage data
+	$(LCOV) --directory $(top_builddir) --capture --output-file coverage.info --no-checksum --compat-libtool
+	LANG=C $(GENHTML) --prefix $(top_builddir) --output-directory coveragereport --title "Code Coverage" --legend --show-details coverage.info
+
+clean-coverage-html: clean-gcda
+	-$(LCOV) --directory $(top_builddir) -z
+	-rm -rf coverage.info coveragereport
+
+.PHONY: coverage-xml generate-coverage-xml clean-coverage-xml
+coverage-xml: clean-gcda
+	-$(MAKE) $(AM_MAKEFLAGS) -k check
+	$(MAKE) $(AM_MAKEFLAGS) generate-coverage-xml
+
+generate-coverage-xml:
+	@echo Generating coverage XML report
+	$(GCOVR) -x -r $(top_builddir) -o $(top_builddir)/coverage.xml
+
+clean-coverage-xml: clean-gcda
+	-rm -rf $(top_builddir)/coverage.xml
+
+clean-local: clean-coverage-html clean-coverage-xml
diff --git a/configure.ac b/configure.ac
index 2d42c3c..0177f3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,16 @@ PKG_CHECK_MODULES([GSD],[gnome-settings-daemon >= $GSD_REQUIRED_VERSION])
 ###########################
 GLIB_GSETTINGS
 
+###########################
+# gcov coverage reporting
+###########################
+
+m4_include([m4/gcov.m4])
+AC_TDD_GCOV
+AC_SUBST(COVERAGE_CFLAGS)
+AC_SUBST(COVERAGE_CXXFLAGS)
+AC_SUBST(COVERAGE_LDFLAGS)
+
 ###########################
 # Check to see if we're local
 ###########################
@@ -118,4 +128,5 @@ Power Indicator Configuration:
 
 	Prefix:        $prefix
 	Local Install: $with_localinstall
+	gcov:          $use_gcov
 ])
diff --git a/m4/gcov.m4 b/m4/gcov.m4
new file mode 100644
index 0000000..1169573
--- /dev/null
+++ b/m4/gcov.m4
@@ -0,0 +1,83 @@
+# Checks for existence of coverage tools:
+#  * gcov
+#  * lcov
+#  * genhtml
+#  * gcovr
+# 
+# Sets ac_cv_check_gcov to yes if tooling is present
+# and reports the executables to the variables LCOV, GCOVR and GENHTML. 
+AC_DEFUN([AC_TDD_GCOV],
+[AC_CACHE_CHECK([whether code coverage tools are available], ac_cv_check_gcov,
+[
+AC_ARG_ENABLE(gcov,
+  AS_HELP_STRING([--enable-gcov],
+		 [enable coverage testing with gcov]),
+  [use_gcov=$enableval], [use_gcov=no])
+
+  if test "x$use_gcov" = "xyes"; then
+  # we need gcc:
+  if test "$GCC" != "yes"; then
+    AC_MSG_ERROR([GCC is required for --enable-gcov])
+  fi
+
+  # Check if ccache is being used
+  AC_CHECK_PROG(SHTOOL, shtool, shtool)
+  case `$SHTOOL path $CC` in
+    *ccache*[)] gcc_ccache=yes;;
+    *[)] gcc_ccache=no;;
+  esac
+
+  if test "$gcc_ccache" = "yes" && (test -z "$CCACHE_DISABLE" || test "$CCACHE_DISABLE" != "1"); then
+    AC_MSG_ERROR([ccache must be disabled when --enable-gcov option is used. You can disable ccache by setting environment variable CCACHE_DISABLE=1.])
+  fi
+
+  lcov_version_list="1.6 1.7 1.8 1.9"
+  AC_CHECK_PROG(LCOV, lcov, lcov)
+  AC_CHECK_PROG(GENHTML, genhtml, genhtml)
+  AC_CHECK_PROG(GCOVR, gcovr, gcovr)
+
+  if test "$LCOV"; then
+    AC_CACHE_CHECK([for lcov version], glib_cv_lcov_version, [
+      glib_cv_lcov_version=invalid
+      lcov_version=`$LCOV -v 2>/dev/null | $SED -e 's/^.* //'`
+      for lcov_check_version in $lcov_version_list; do
+        if test "$lcov_version" = "$lcov_check_version"; then
+          glib_cv_lcov_version="$lcov_check_version (ok)"
+        fi
+      done
+    ])
+  else
+    lcov_msg="To enable code coverage reporting you must have one of the following lcov versions installed: $lcov_version_list"
+    AC_MSG_ERROR([$lcov_msg])
+  fi
+
+  case $glib_cv_lcov_version in
+    ""|invalid[)]
+      lcov_msg="You must have one of the following versions of lcov: $lcov_version_list (found: $lcov_version)."
+      AC_MSG_ERROR([$lcov_msg])
+      LCOV="exit 0;"
+      ;;
+  esac
+
+  if test -z "$GENHTML"; then
+    AC_MSG_ERROR([Could not find genhtml from the lcov package])
+  fi
+
+  if test -z "$GCOVR"; then
+    AC_MSG_ERROR([Could not find gcovr; easy_install (or pip) gcovr])
+  fi
+
+
+  # Remove all optimization flags from CFLAGS
+  changequote({,})
+  CFLAGS=`echo "$CFLAGS" | $SED -e 's/-O[0-9]*//g'`
+  changequote([,])
+
+  # Add the special gcc flags
+  COVERAGE_CFLAGS="-O0 -fprofile-arcs -ftest-coverage"
+  COVERAGE_CXXFLAGS="-O0 -fprofile-arcs -ftest-coverage"	
+  COVERAGE_LDFLAGS="-lgcov"
+
+fi
+])]) # AC_TDD_GCOV
+
-- 
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