[Qemu-devel] [PATCH 2/3] qemu-iotests: add _require_feature() function

[Cleber Rosa]

With the previously introduced buildconf.py script, it's possible
to determine if a feature needed by a test is present or not.  This
adds a thin layer on top of scripts/buildconf.py, and allows tests
to be skipped when a feature is required.

The naming of the function, while different in tense from the
_supported_* family of functions, was chosen to match the style
of _require_command(), which seems pretty similar.

Signed-off-by: Cleber Rosa <address@hidden>
---
 tests/qemu-iotests/check     | 2 ++
 tests/qemu-iotests/common.rc | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 2a55ec9..c0f4004 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -60,6 +60,8 @@ fi
 
 build_root="$build_iotests/../.."
 
+export BUILDCONF="$build_root/scripts/buildconf.py"
+
 if [ -x "$build_iotests/socket_scm_helper" ]
 then
     export SOCKET_SCM_HELPER="$build_iotests/socket_scm_helper"
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 2548e58..19b3111 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -470,6 +470,13 @@ _require_command()
     [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
 }
 
+# tests whether a given configure time feature is enabled
+#
+_require_feature()
+{
+    $BUILDCONF -c -n $1 || _notrun "feature not enabled: $1"
+}
+
 _full_imgfmt_details()
 {
     if [ -n "$IMGOPTS" ]; then
-- 
2.9.4