virt-install: Add --boot initargs=

Expects a shell escaped string which we split into individual initarg bits

tests/xmlparse-xml/change-guest-out.xml

@@ -10,6 +10,9 @@
     <init>/sbin/init</init>
     <bootmenu enable="no"/>
     <bios useserial="yes"/>
+    <initarg>foo</initarg>
+    <initarg>bar baz</initarg>
+    <initarg>frib</initarg>
   </os>
   <features><apic eoi="on"/>
     <hyperv>

tests/xmlparse.py

@@ -155,6 +155,10 @@ class XMLParseTest(unittest.TestCase):
         check("initrd", None)
         check("kernel_args", None)
 
+        guest.os.set_initargs_string("foo 'bar baz' frib")
+        self.assertEqual([i.val for i in guest.os.initargs],
+            ["foo", "bar baz", "frib"])
+
         check = self._make_checker(guest.features)
         check("acpi", True, False)
         check("apic", True, True)

virtinst/cli.py

@@ -1425,6 +1425,12 @@ class ParserBoot(VirtCLIParser):
         self.set_param("os.os_type", "os_type")
         self.set_param("emulator", "emulator")
 
+        def set_initargs_cb(opts, inst, cliname, val):
+            ignore = opts
+            ignore = cliname
+            inst.os.set_initargs_string(val)
+        self.set_param("os.initargs", "initargs", setter_cb=set_initargs_cb)
+
         # Order matters for boot devices, we handle it specially in parse
         def noset_cb(val):
             ignore = val

virtinst/osxml.py

@@ -20,6 +20,11 @@
 from virtinst.xmlbuilder import XMLBuilder, XMLProperty, XMLChildProperty
 
 
+class _InitArg(XMLBuilder):
+    _XML_ROOT_NAME = "initarg"
+    val = XMLProperty(".")
+
+
 class _BootDevice(XMLBuilder):
     _XML_ROOT_NAME = "boot"
     dev = XMLProperty("./@dev")
@@ -72,6 +77,18 @@ class OSXML(XMLBuilder):
     _bootdevs = XMLChildProperty(_BootDevice)
     bootorder = property(_get_bootorder, _set_bootorder)
 
+    initargs = XMLChildProperty(_InitArg)
+    def add_initarg(self, val):
+        obj = _InitArg(self.conn)
+        obj.val = val
+        self._add_child(obj)
+    def set_initargs_string(self, argstring):
+        import shlex
+        for obj in self.initargs:
+            self._remove_child(obj)
+        for val in shlex.split(argstring):
+            self.add_initarg(val)
+
     enable_bootmenu = XMLProperty("./bootmenu/@enable", is_yesno=True)
     useserial = XMLProperty("./bios/@useserial", is_yesno=True)