initialize: only restart networkd once per config

Regression introduced by 9fcf338bf3.

Networkd was erroneously being restarted once per network unit. It
should only restart once for the entire config.

initialize/config.go

@@ -200,6 +200,7 @@ func processUnits(units []system.Unit, root string, um system.UnitManager) error
 	}
 	actions := make([]action, 0, len(units))
 	reload := false
+	restartNetworkd := false
 	for _, unit := range units {
 		if unit.Name == "" {
 			log.Printf("Skipping unit without name")
@@ -251,8 +252,7 @@ func processUnits(units []system.Unit, root string, um system.UnitManager) error
 		}
 
 		if unit.Group() == "network" {
-			networkd := system.Unit{Unit: config.Unit{Name: "systemd-networkd.service"}}
-			actions = append(actions, action{networkd, "restart"})
+			restartNetworkd = true
 		} else if unit.Command != "" {
 			actions = append(actions, action{unit, unit.Command})
 		}
@@ -264,6 +264,11 @@ func processUnits(units []system.Unit, root string, um system.UnitManager) error
 		}
 	}
 
+	if restartNetworkd {
+		networkd := system.Unit{Unit: config.Unit{Name: "systemd-networkd.service"}}
+		actions = append(actions, action{networkd, "restart"})
+	}
+
 	for _, action := range actions {
 		log.Printf("Calling unit command %q on %q'", action.command, action.unit.Name)
 		res, err := um.RunUnitCommand(action.unit, action.command)

initialize/config_test.go

@@ -29,10 +29,15 @@ type TestUnitManager struct {
 	enabled  []string
 	masked   []string
 	unmasked []string
-	commands map[string]string
+	commands []UnitAction
 	reload   bool
 }
 
+type UnitAction struct {
+	unit    string
+	command string
+}
+
 func (tum *TestUnitManager) PlaceUnit(u system.Unit) error {
 	tum.placed = append(tum.placed, u.Name)
 	return nil
@@ -46,8 +51,7 @@ func (tum *TestUnitManager) EnableUnitFile(u system.Unit) error {
 	return nil
 }
 func (tum *TestUnitManager) RunUnitCommand(u system.Unit, c string) (string, error) {
-	tum.commands = make(map[string]string)
-	tum.commands[u.Name] = c
+	tum.commands = append(tum.commands, UnitAction{u.Name, c})
 	return "", nil
 }
 func (tum *TestUnitManager) DaemonReload() error {
@@ -82,13 +86,16 @@ func TestProcessUnits(t *testing.T) {
 		},
 		{
 			units: []system.Unit{
+				system.Unit{Unit: config.Unit{
+					Name: "foo.network",
+				}},
 				system.Unit{Unit: config.Unit{
 					Name: "bar.network",
 				}},
 			},
 			result: TestUnitManager{
-				commands: map[string]string{
-					"systemd-networkd.service": "restart",
+				commands: []UnitAction{
+					UnitAction{"systemd-networkd.service", "restart"},
 				},
 			},
 		},