GitHub Action CI: Add Go source file format check (#6090)

https://github.com/XTLS/Xray-core/pull/6057#issuecomment-4364819830

And https://github.com/XTLS/Xray-core/pull/6149#issuecomment-4546876261

proxy/vless/encoding/encoding_test.go

@@ -53,7 +53,7 @@ func TestRequestSerialization(t *testing.T) {
 	}
 
 	addonsComparer := func(x, y *Addons) bool {
-		return (x.Flow == y.Flow) && (cmp.Equal(x.Seed, y.Seed))
+		return (x.Flow == y.Flow) && cmp.Equal(x.Seed, y.Seed)
 	}
 	if r := cmp.Diff(actualAddons, expectedAddons, cmp.Comparer(addonsComparer)); r != "" {
 		t.Error(r)
@@ -125,7 +125,7 @@ func TestMuxRequest(t *testing.T) {
 	}
 
 	addonsComparer := func(x, y *Addons) bool {
-		return (x.Flow == y.Flow) && (cmp.Equal(x.Seed, y.Seed))
+		return (x.Flow == y.Flow) && cmp.Equal(x.Seed, y.Seed)
 	}
 	if r := cmp.Diff(actualAddons, expectedAddons, cmp.Comparer(addonsComparer)); r != "" {
 		t.Error(r)

proxy/vless/encryption/client.go

@@ -79,7 +79,7 @@ func (i *ClientInstance) Handshake(conn net.Conn) (*CommonConn, error) {
 	var nfsKey []byte
 	var lastCTR cipher.Stream
 	for j, k := range i.NfsPKeys {
-		var index = 32
+		index := 32
 		if k, ok := k.(*ecdh.PublicKey); ok {
 			privateKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
 			copy(relays, privateKey.PublicKey().Bytes())

proxy/vless/encryption/server.go

@@ -135,7 +135,7 @@ func (i *ServerInstance) Handshake(conn net.Conn, fallback *[]byte) (*CommonConn
 		if lastCTR != nil {
 			lastCTR.XORKeyStream(relays, relays[:32]) // recover this relay
 		}
-		var index = 32
+		index := 32
 		if _, ok := k.(*mlkem.DecapsulationKey768); ok {
 			index = 1088
 		}

proxy/vless/inbound/inbound.go

@@ -630,9 +630,11 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		return r.NewMux(ctx, dispatcher.WrapLink(ctx, h.policyManager, h.stats, &transport.Link{Reader: clientReader, Writer: clientWriter}), h.observer)
 	}
 
-	if err := dispatch.DispatchLink(ctx, request.Destination(), &transport.Link{
-		Reader: clientReader,
-		Writer: clientWriter},
+	if err := dispatch.DispatchLink(
+		ctx, request.Destination(), &transport.Link{
+			Reader: clientReader,
+			Writer: clientWriter,
+		},
 	); err != nil {
 		return errors.New("failed to dispatch request").Base(err)
 	}

proxy/vless/validator.go

@@ -79,7 +79,7 @@ func (v *MemoryValidator) GetByEmail(email string) *protocol.MemoryUser {
 
 // Get all users
 func (v *MemoryValidator) GetAll() []*protocol.MemoryUser {
-	var u = make([]*protocol.MemoryUser, 0, 100)
+	u := make([]*protocol.MemoryUser, 0, 100)
 	v.email.Range(func(key, value interface{}) bool {
 		u = append(u, value.(*protocol.MemoryUser))
 		return true