[PATCH 09/12] tests: add Valgrind support

[John Keeping]

Now running tests with the "--valgrind" option will run cgit under
Valgrind instead of all Git commands.

Signed-off-by: John Keeping <john at keeping.me.uk>
---
 tests/setup.sh          | 37 ++++++++++++++++++++++++++++++++++++-
 tests/valgrind/bin/cgit | 12 ++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100755 tests/valgrind/bin/cgit

diff --git a/tests/setup.sh b/tests/setup.sh
index 81594cf..5977390 100755
--- a/tests/setup.sh
+++ b/tests/setup.sh
@@ -15,12 +15,47 @@
 # run_test 'repo index' 'cgit_url "/" | tidy -e'
 # run_test 'repo summary' 'cgit_url "/foo" | tidy -e'
 
+# We don't want to run Git commands through Valgrind, so we filter out the
+# --valgrind option here and handle it ourselves.  We copy the arguments
+# assuming that none contain a newline, although other whitespace is
+# preserved.
+LF='
+'
+test_argv=
+
+while test $# != 0
+do
+	case "$1" in
+	--va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
+		cgit_valgrind=t
+		test_argv="$test_argv${LF}--verbose"
+		;;
+	*)
+		test_argv="$test_argv$LF$1"
+		;;
+	esac
+	shift
+done
+
+OLDIFS=$IFS
+IFS=$LF
+set -- $test_argv
+IFS=$OLDIFS
+
 : ${TEST_DIRECTORY=$(pwd)/../git/t}
 TEST_NO_CREATE_REPO=YesPlease
 . "$TEST_DIRECTORY"/test-lib.sh
 
 # Prepend the directory containing cgit to PATH.
-PATH="$(pwd)/../..:$PATH"
+if test -n "$cgit_valgrind"
+then
+	GIT_VALGRIND="$TEST_DIRECTORY/valgrind"
+	CGIT_VALGRIND=$(cd ../valgrind && pwd)
+	PATH="$CGIT_VALGRIND/bin:$PATH"
+	export GIT_VALGRIND CGIT_VALGRIND
+else
+	PATH="$(pwd)/../..:$PATH"
+fi
 
 mkrepo() {
 	name=$1
diff --git a/tests/valgrind/bin/cgit b/tests/valgrind/bin/cgit
new file mode 100755
index 0000000..dcdfbe5
--- /dev/null
+++ b/tests/valgrind/bin/cgit
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# Note that we currently use Git's suppression file and there are variables
+# $GIT_VALGRIND and $CGIT_VALGRIND which point to different places.
+exec valgrind -q --error-exitcode=126 \
+	--suppressions="$GIT_VALGRIND/default.supp" \
+	--gen-suppressions=all \
+	--leak-check=no \
+	--track-origins=yes \
+	--log-fd=4 \
+	--input-fd=4 \
+	"$CGIT_VALGRIND/../../cgit" "$@"
-- 
1.8.2.694.ga76e9c3.dirty