virt-install: support --input none

Disables adding any default input devices

Signed-off-by: Cole Robinson <crobinso@redhat.com>

tests/data/cli/compare/virt-install-singleton-config-1.xml

@@ -52,7 +52,6 @@
     <controller type="pci" model="pcie-root-port"/>
     <controller type="pci" model="pcie-root-port"/>
     <controller type="pci" model="pcie-root-port"/>
-    <input type="tablet" bus="usb"/>
     <graphics type="spice" port="-1" tlsPort="-1" autoport="yes">
       <image compression="off"/>
     </graphics>

tests/test_cli.py

@@ -868,6 +868,7 @@ c.add_compare(
 --smartcard none
 --tpm none
 --rng none
+--input none
 """, "singleton-config-1")
 
 

virtinst/cli.py

@@ -4169,6 +4169,13 @@ class ParserInput(VirtCLIParser):
     cli_arg_name = "input"
     guest_propname = "devices.input"
     remove_first = "type"
+    stub_none = False
+
+    def _parse(self, inst):
+        if self.optstr == "none":
+            self.guest.skip_default_input = True
+            return
+        return super()._parse(inst)
 
     @classmethod
     def _virtcli_class_init(cls):

virtinst/guest.py

@@ -211,6 +211,7 @@ class Guest(XMLBuilder):
         self.skip_default_graphics = False
         self.skip_default_rng = False
         self.skip_default_tpm = False
+        self.skip_default_input = False
         self.have_default_tpm = False
         self.x86_cpu_default = self.cpu.SPECIAL_MODE_APP_DEFAULT
 
@@ -1064,6 +1065,8 @@ class Guest(XMLBuilder):
         return all([c.model == "none" for c in controllers])
 
     def _add_default_input_device(self):
+        if self.skip_default_input:
+            return
         if self.os.is_container():
             return
         if self.devices.input: