[PATCH v2 03/29] python/qemu: Add binutils::binary_get_version()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Add a helper to query the version of a QEMU binary.
We simply send the 'query-version' command over a QMP
socket.
Introduce the PythonQemuCoreScripts class to test our
new helper.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 python/qemu/binutils.py          | 38 ++++++++++++++++++++++++++++++++
 tests/acceptance/core_scripts.py | 31 ++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 python/qemu/binutils.py
 create mode 100644 tests/acceptance/core_scripts.py

diff --git a/python/qemu/binutils.py b/python/qemu/binutils.py
new file mode 100644
index 0000000000..96b200eef4
--- /dev/null
+++ b/python/qemu/binutils.py
@@ -0,0 +1,38 @@
+"""
+QEMU binary utility module:
+
+The binary utility module provides helpers to query QEMU binary for
+build-dependent configuration options at runtime.
+"""
+#
+# Copyright (c) 2020 Red Hat, Inc.
+#
+# Author:
+#  Philippe Mathieu-Daudé <philmd@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or later.
+# See the COPYING file in the top-level directory.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import logging
+
+from .machine import QEMUMachine
+
+LOG = logging.getLogger(__name__)
+
+
+def binary_get_version(qemu_bin):
+    '''
+    Get QEMU binary version
+
+    @param qemu_bin (str): path to the QEMU binary
+    @return binary version (dictionary with major/minor/micro keys)
+    '''
+    with QEMUMachine(qemu_bin) as vm:
+        vm.set_machine('none')
+        vm.launch()
+        res = vm.command('query-version')
+        LOG.info(res)
+        vm.shutdown()
+        return res['qemu']
diff --git a/tests/acceptance/core_scripts.py b/tests/acceptance/core_scripts.py
new file mode 100644
index 0000000000..3f253337cd
--- /dev/null
+++ b/tests/acceptance/core_scripts.py
@@ -0,0 +1,31 @@
+# Tests covering various python/qemu/ scripts
+#
+# Copyright (c) 2020 Red Hat, Inc.
+#
+# Author:
+#  Philippe Mathieu-Daudé <philmd@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or later.
+# See the COPYING file in the top-level directory.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import sys
+import os
+import logging
+
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
+from avocado_qemu import Test
+from qemu.binutils import binary_get_version
+
+
+class PythonQemuCoreScripts(Test):
+
+    def test_get_version(self):
+        logger = logging.getLogger('core')
+        version = binary_get_version(self.qemu_bin)
+        logger.debug('version: {}'.format(version))
+        # QMP 'query-version' introduced with QEMU v0.14
+        self.assertGreaterEqual(version['major'], 0)
+        if version['major'] == 0:
+            self.assertGreaterEqual(version['minor'], 14)
-- 
2.21.1