virt-install: Support --network source, source_mode, target

The latter two bits are needed for macvtap configuration.

man/virt-install.pod

@@ -634,6 +634,10 @@ with a name of C<default>. Use a virtual network if the host has dynamic
 networking (eg NetworkManager), or using wireless. The guest will be
 NATed to the LAN by whichever connection is active.
 
+=item type=direct,source=IFACE[,source_mode=MODE]
+
+Direct connect to host interface IFACE using macvtap.
+
 =item user
 
 Connect to the LAN using SLIRP. Only use this if running a QEMU guest as

tests/cli-test-xml/compare/many-devices.xml

@@ -74,6 +74,11 @@
       <mac address="00:11:22:33:44:55"/>
       <model type="virtio"/>
     </interface>
+    <interface type="direct">
+      <source dev="eth5" mode="vepa"/>
+      <mac address="00:11:22:33:44:55"/>
+      <target dev="mytap12"/>
+    </interface>
     <input type="mouse" bus="ps2"/>
     <serial type="tcp">
       <source mode="bind" host="127.0.0.1" service="2222"/>
@@ -173,6 +178,11 @@
       <mac address="00:11:22:33:44:55"/>
       <model type="virtio"/>
     </interface>
+    <interface type="direct">
+      <source dev="eth5" mode="vepa"/>
+      <mac address="00:11:22:33:44:55"/>
+      <target dev="mytap12"/>
+    </interface>
     <input type="mouse" bus="ps2"/>
     <serial type="tcp">
       <source mode="bind" host="127.0.0.1" service="2222"/>

tests/clitest.py

@@ -506,6 +506,7 @@ c.add_compare("""--hvm --pxe \
 --filesystem /source,/target,mode=squash \
 --network user,mac=12:34:56:78:11:22 \
 --network bridge=foobar,model=virtio \
+--network type=direct,source=eth5,source_mode=vepa,target=mytap12 \
 --channel spicevmc \
 --smartcard passthrough,type=spicevmc \
 --tpm /dev/tpm0 \

virtinst/cli.py

@@ -1516,8 +1516,10 @@ def parse_network(guest, optstr, dev):
     if "type" not in opts:
         if "network" in opts:
             opts["type"] = virtinst.VirtualNetworkInterface.TYPE_VIRTUAL
+            opts["source"] = opts.pop("network")
         elif "bridge" in opts:
             opts["type"] = virtinst.VirtualNetworkInterface.TYPE_BRIDGE
+            opts["source"] = opts.pop("bridge")
 
     def convert_mac(key, val):
         ignore = key
@@ -1526,8 +1528,9 @@ def parse_network(guest, optstr, dev):
         return val
 
     set_param("type", "type")
-    set_param("source", "network")
-    set_param("source", "bridge")
+    set_param("source", "source")
+    set_param("source_mode", "source_mode")
+    set_param("target_dev", "target")
     set_param("model", "model")
     set_param("macaddr", "mac", convert_cb=convert_mac)
     set_param("filterref", "filterref")