virt-install: Deal with os-variant's install param

As os-variant has a new "install" parameter that can be passed, let's
take advantage of it and automatically fill options.location with data
from osinfo-db whenever install=location is passed (and, of course,
osinfo-db has the information).

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>

virt-install

@@ -441,6 +441,19 @@ def build_installer(options, guest):
     install_bootdev = None
 
     has_installer = True
+    if options.os_variant.install == "location":
+        if not options.location:
+            location = guest.osinfo.get_location(guest.os.arch)
+            if not location:
+                logging.debug(_("No location could be guessed from osinfo-db "
+                    "and the installation cannot proceed"))
+                # This triggers an error in validate_required_options
+                return None
+            logging.debug("Generated default libosinfo '--location %s'", location)
+            options.location = location
+    elif options.os_variant.install == "cdrom":
+        pass
+
     if options.location:
         (location,
          location_kernel,