cli: Add --metadata os_name= and os_full_id=

Allows changing the libosinfo metadata for an existing vm via virt-xml

tests/cli-test-xml/compare/virt-xml-edit-metadata-full-os.xml

@@ -0,0 +1,11 @@
+   </description>
+   <metadata>
+     <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
+-      <libosinfo:os id="http://fedoraproject.org/fedora/27"/>
++      <libosinfo:os id="http://fedoraproject.org/fedora/23"/>
+     </libosinfo:libosinfo>
+   </metadata>
+   <memory unit="KiB">409600</memory>
+
+Domain 'test-for-virtxml' defined successfully.
+Changes will take effect after the domain is fully powered off.

tests/cli-test-xml/compare/virt-xml-edit-simple-metadata.xml

@@ -10,7 +10,11 @@
 +very,very=new desc'</description>
    <metadata>
      <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
-       <libosinfo:os id="http://fedoraproject.org/fedora/27"/>
+-      <libosinfo:os id="http://fedoraproject.org/fedora/27"/>
++      <libosinfo:os id="http://fedoraproject.org/fedora/13"/>
+     </libosinfo:libosinfo>
+   </metadata>
+   <memory unit="KiB">409600</memory>
 @@
      </panic>
    </devices>

tests/clitest.py

@@ -852,9 +852,10 @@ c.add_compare("--connect %(URI-KVM)s test-hyperv-uefi --edit --boot uefi", "hype
 
 
 c = vixml.add_category("simple edit diff", "test-for-virtxml --edit --print-diff --define")
-c.add_compare("""--metadata name=foo-my-new-name,uuid=12345678-12F4-1234-1234-123456789AFA,description="hey this is my
+c.add_compare("""--metadata name=foo-my-new-name,os_name=fedora13,uuid=12345678-12F4-1234-1234-123456789AFA,description="hey this is my
 new
 very,very=new desc\\\'",title="This is my,funky=new title" """, "edit-simple-metadata")
+c.add_compare("""--metadata os_full_id=http://fedoraproject.org/fedora/23""", "edit-metadata-full-os")
 c.add_compare("--events on_poweroff=destroy,on_reboot=restart,on_crash=preserve", "edit-simple-events")
 c.add_compare("--qemu-commandline='-foo bar,baz=\"wib wob\"'", "edit-simple-qemu-commandline")
 c.add_compare("--memory 500,maxmemory=1000,hugepages=off", "edit-simple-memory")

tests/xmlparse.py

@@ -117,6 +117,9 @@ class XMLParseTest(unittest.TestCase):
 
         check = self._make_checker(guest._metadata.libosinfo)  # pylint: disable=protected-access
         check("os_id", "http://fedoraproject.org/fedora/17")
+        guest.set_os_full_id("http://fedoraproject.org/fedora/10")
+        check("os_id", "http://fedoraproject.org/fedora/10")
+        self.assertEqual(guest.osinfo.name, "fedora10")
         guest.set_os_name("generic")
         check("os_id", None, "frib")
         self.assertEqual(guest.osinfo.name, "generic")

virtinst/cli.py

@@ -1299,11 +1299,19 @@ def parse_check(checkstr):
 class ParserMetadata(VirtCLIParser):
     cli_arg_name = "metadata"
 
+    def set_os_name_cb(self, inst, val, virtarg):
+        inst.set_os_name(val)
+
+    def set_os_full_id_cb(self, inst, val, virtarg):
+        inst.set_os_full_id(val)
+
 _register_virt_parser(ParserMetadata)
 ParserMetadata.add_arg("name", "name", can_comma=True)
 ParserMetadata.add_arg("title", "title", can_comma=True)
 ParserMetadata.add_arg("uuid", "uuid")
 ParserMetadata.add_arg("description", "description", can_comma=True)
+ParserMetadata.add_arg(None, "os_name", cb=ParserMetadata.set_os_name_cb)
+ParserMetadata.add_arg(None, "os_full_id", cb=ParserMetadata.set_os_full_id_cb)
 
 
 ####################

virtinst/guest.py

@@ -262,7 +262,16 @@ class Guest(XMLBuilder):
             raise ValueError(
                 _("Distro '%s' does not exist in our dictionary") % name)
 
-        logging.debug("Setting Guest os_name=%s", name)
+        logging.debug("Setting Guest osinfo %s", obj)
+        self.__osinfo = obj
+        self._metadata.libosinfo.os_id = self.__osinfo.full_id
+
+    def set_os_full_id(self, full_id):
+        obj = OSDB.lookup_os_by_full_id(full_id)
+        if obj is None:
+            raise ValueError(_("Unknown libosinfo ID '%s'") % full_id)
+
+        logging.debug("Setting Guest osinfo %s", obj)
         self.__osinfo = obj
         self._metadata.libosinfo.os_id = self.__osinfo.full_id