Override outbounds in multi config files (#2659)

* fix override outbounds in multi config

* log outbounds override status

* fix prepend bug

* improve outbounds-prepend test

* fix prepend outbound

* fix outbounds-prepend test

infra/conf/xray.go

@@ -504,21 +504,23 @@ func (c *Config) Override(o *Config, fn string) {
 
 	// update the Outbound in slice if the only one in overide config has same tag
 	if len(o.OutboundConfigs) > 0 {
-		if len(c.OutboundConfigs) > 0 && len(o.OutboundConfigs) == 1 {
-			if idx := c.findOutboundTag(o.OutboundConfigs[0].Tag); idx > -1 {
-				c.OutboundConfigs[idx] = o.OutboundConfigs[0]
-				ctllog.Println("[", fn, "] updated outbound with tag: ", o.OutboundConfigs[0].Tag)
+		outboundPrepends := []OutboundDetourConfig{}
+		for i := range o.OutboundConfigs {
+			if idx := c.findOutboundTag(o.OutboundConfigs[i].Tag); idx > -1 {
+				c.OutboundConfigs[idx] = o.OutboundConfigs[i]
+				newError("[", fn, "] updated outbound with tag: ", o.OutboundConfigs[i].Tag).AtInfo().WriteToLog()
 			} else {
 				if strings.Contains(strings.ToLower(fn), "tail") {
-					c.OutboundConfigs = append(c.OutboundConfigs, o.OutboundConfigs[0])
-					ctllog.Println("[", fn, "] appended outbound with tag: ", o.OutboundConfigs[0].Tag)
+					c.OutboundConfigs = append(c.OutboundConfigs, o.OutboundConfigs[i])
+					newError("[", fn, "] appended outbound with tag: ", o.OutboundConfigs[i].Tag).AtInfo().WriteToLog()
 				} else {
-					c.OutboundConfigs = append(o.OutboundConfigs, c.OutboundConfigs...)
-					ctllog.Println("[", fn, "] prepended outbound with tag: ", o.OutboundConfigs[0].Tag)
+					outboundPrepends = append(outboundPrepends, o.OutboundConfigs[i])
+					newError("[", fn, "] prepend outbound with tag: ", o.OutboundConfigs[i].Tag).AtInfo().WriteToLog()
 				}
 			}
-		} else {
-			c.OutboundConfigs = o.OutboundConfigs
+		}
+		if !strings.Contains(strings.ToLower(fn), "tail") && len(outboundPrepends) > 0 {
+			c.OutboundConfigs = append(outboundPrepends, c.OutboundConfigs...)
 		}
 	}
 }

infra/conf/xray_test.go

@@ -445,10 +445,10 @@ func TestConfig_Override(t *testing.T) {
 		},
 		{
 			"replace/outbounds-prepend",
-			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos0"}, {Protocol: "vmess", Tag: "pos1"}}},
-			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos1", Protocol: "kcp"}, {Tag: "pos2", Protocol: "kcp"}}},
+			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos0"}, {Protocol: "vmess", Tag: "pos1"}, {Tag: "pos3"}}},
+			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos1", Protocol: "kcp"}, {Tag: "pos2", Protocol: "kcp"}, {Tag: "pos4", Protocol: "kcp"}}},
 			"config.json",
-			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos1", Protocol: "kcp"}, {Tag: "pos2", Protocol: "kcp"}}},
+			&Config{OutboundConfigs: []OutboundDetourConfig{{Tag: "pos2", Protocol: "kcp"}, {Tag: "pos4", Protocol: "kcp"}, {Tag: "pos0"}, {Tag: "pos1", Protocol: "kcp"}, {Tag: "pos3"}}},
 		},
 		{
 			"replace/outbounds-append",