python/qmp: add fuse command to 'qom' tools

The 'fuse' command will be unavailable if 'fusepy' is not installed. It
will simply not load and subsequently be unavailable as a subcommand.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210603003719.1321369-20-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

python/qemu/qmp/qom.py

 """
 QEMU Object Model testing tools.
 
-usage: qom [-h] {set,get,list,tree} ...
+usage: qom [-h] {set,get,list,tree,fuse} ...
 
 Query and manipulate QOM data
 
@@ -9,11 +9,12 @@
   -h, --help           show this help message and exit
 
 QOM commands:
-  {set,get,list,tree}
+  {set,get,list,tree,fuse}
     set                Set a QOM property value
     get                Get a QOM property value
     list               List QOM properties at a given path
     tree               Show QOM tree from a given path
+    fuse               Mount a QOM tree as a FUSE filesystem
 """
 ##
 # Copyright John Snow 2020, for Red Hat, Inc.
@@ -35,6 +36,15 @@
 from .qom_common import QOMCommand
 
 
+try:
+    from .qom_fuse import QOMFuse
+except ModuleNotFoundError as err:
+    if err.name != 'fuse':
+        raise
+else:
+    assert issubclass(QOMFuse, QOMCommand)
+
+
 class QOMSet(QOMCommand):
     """
     QOM Command - Set a property to a given value.

python/setup.cfg

@@ -49,6 +49,7 @@ console_scripts =
     qom-get = qemu.qmp.qom:QOMGet.entry_point
     qom-list = qemu.qmp.qom:QOMList.entry_point
     qom-tree = qemu.qmp.qom:QOMTree.entry_point
+    qom-fuse = qemu.qmp.qom_fuse:QOMFuse.entry_point [fuse]
 
 [flake8]
 extend-ignore = E722  # Prefer pylint's bare-except checks to flake8's