chore: Cleanup code

adapter/outboundgroup/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package outboundgroup
 

adapter/provider/parser.go

@@ -79,7 +79,7 @@ func ParseProxyProvider(name string, mapping map[string]any) (types.ProxyProvide
 	case "http":
 		if schema.Path != "" {
 			path := C.Path.Resolve(schema.Path)
-			if !features.Contains("cmfa") && !C.Path.IsSafePath(path) {
+			if !features.CMFA && !C.Path.IsSafePath(path) {
 				return nil, fmt.Errorf("%w: %s", errSubPath, path)
 			}
 			vehicle = resource.NewHTTPVehicle(schema.URL, path)

adapter/provider/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package provider
 

component/dialer/dialer.go

@@ -71,7 +71,7 @@ func DialContext(ctx context.Context, network, address string, options ...Option
 }
 
 func ListenPacket(ctx context.Context, network, address string, options ...Option) (net.PacketConn, error) {
-	if features.Contains("cmfa") && DefaultSocketHook != nil{
+	if features.CMFA && DefaultSocketHook != nil {
 		return listenPacketHooked(ctx, network, address)
 	}
 
@@ -119,7 +119,7 @@ func GetTcpConcurrent() bool {
 }
 
 func dialContext(ctx context.Context, network string, destination netip.Addr, port string, opt *option) (net.Conn, error) {
-	if features.Contains("cmfa") && DefaultSocketHook != nil{
+	if features.CMFA && DefaultSocketHook != nil {
 		return dialContextHooked(ctx, network, destination, port)
 	}
 

component/dialer/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package dialer
 

component/dialer/patch_common.go

@@ -1,4 +1,4 @@
-// +build !cmfa
+//go:build !(android && cmfa)
 
 package dialer
 

component/mmdb/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package mmdb
 

component/process/process.go

@@ -3,7 +3,6 @@ package process
 import (
 	"errors"
 	"net/netip"
-	"github.com/metacubex/mihomo/constant"
 )
 
 var (
@@ -20,7 +19,3 @@ const (
 func FindProcessName(network string, srcIP netip.Addr, srcPort int) (uint32, string, error) {
 	return findProcessName(network, srcIP, srcPort)
 }
-
-func FindPackageName(metadata *constant.Metadata) (string, error) {
-	return "", nil
-}

component/process/process_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package process
 

component/process/process_common.go

@@ -0,0 +1,9 @@
+//go:build !(android && cmfa)
+
+package process
+
+import "github.com/metacubex/mihomo/constant"
+
+func FindPackageName(metadata *constant.Metadata) (string, error) {
+	return "", nil
+}

config/config.go

@@ -554,7 +554,7 @@ func ParseRawConfig(rawCfg *RawConfig) (*Config, error) {
 	config.DNS = dnsCfg
 
 	err = parseTun(rawCfg.Tun, config.General)
-	if !features.Contains("cmfa") && err != nil {
+	if !features.CMFA && err != nil {
 		return nil, err
 	}
 

constant/features/cmfa.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "cmfa")
-}
+const CMFA = true

constant/features/cmfa_stub.go

@@ -0,0 +1,5 @@
+//go:build !cmfa
+
+package features
+
+const CMFA = false

constant/features/low_memory.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "with_low_memory")
-}
+const WithLowMemory = true

constant/features/low_memory_stub.go

@@ -0,0 +1,5 @@
+//go:build !with_low_memory
+
+package features
+
+const WithLowMemory = false

constant/features/no_fake_tcp.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "no_fake_tcp")
-}
+const NoFakeTCP = true

constant/features/no_fake_tcp_stub.go

@@ -0,0 +1,5 @@
+//go:build !no_fake_tcp
+
+package features
+
+const NoFakeTCP = false

constant/features/tags.go

@@ -1,11 +1,17 @@
 package features
 
-import(
-	"golang.org/x/exp/slices"
-)
-
-var TAGS = make([]string, 0, 0)
-
-func Contains(feat string) (bool) {
-	return slices.Contains(TAGS, feat)
+func Tags() (tags []string) {
+	if CMFA {
+		tags = append(tags, "cmfa")
+	}
+	if WithLowMemory {
+		tags = append(tags, "with_low_memory")
+	}
+	if NoFakeTCP {
+		tags = append(tags, "no_fake_tcp")
+	}
+	if WithGVisor {
+		tags = append(tags, "with_gvisor")
+	}
+	return
 }

constant/features/with_gvisor.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "with_gvisor")
-}
+const WithGVisor = true

constant/features/with_gvisor_stub.go

@@ -0,0 +1,5 @@
+//go:build !with_gvisor
+
+package features
+
+const WithGVisor = false

dns/dhcp.go

@@ -1,4 +1,4 @@
-// +build !cmfa
+//go:build !(android && cmfa)
 
 package dns
 

dns/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package dns
 

dns/patch_common.go

@@ -1,7 +1,6 @@
-// +build !cmfa
+//go:build !(android && cmfa)
 
 package dns
 
 func UpdateIsolateHandler(resolver *Resolver, mapper *ResolverEnhancer) {
-	return
 }

dns/server.go

@@ -50,7 +50,7 @@ func (s *Server) SetHandler(handler handler) {
 }
 
 func ReCreateServer(addr string, resolver *Resolver, mapper *ResolverEnhancer) {
-	if features.Contains("cmfa") {
+	if features.CMFA {
 		UpdateIsolateHandler(resolver, mapper)
 	}
 

hub/executor/executor.go

@@ -25,6 +25,7 @@ import (
 	"github.com/metacubex/mihomo/component/trie"
 	"github.com/metacubex/mihomo/config"
 	C "github.com/metacubex/mihomo/constant"
+	"github.com/metacubex/mihomo/constant/features"
 	"github.com/metacubex/mihomo/constant/provider"
 	"github.com/metacubex/mihomo/dns"
 	"github.com/metacubex/mihomo/listener"
@@ -35,7 +36,6 @@ import (
 	"github.com/metacubex/mihomo/log"
 	"github.com/metacubex/mihomo/ntp"
 	"github.com/metacubex/mihomo/tunnel"
-	"github.com/metacubex/mihomo/constant/features"
 )
 
 var mux sync.Mutex
@@ -171,7 +171,7 @@ func updateListeners(general *config.General, listeners map[string]C.InboundList
 	listener.ReCreateHTTP(general.Port, tunnel.Tunnel)
 	listener.ReCreateSocks(general.SocksPort, tunnel.Tunnel)
 	listener.ReCreateRedir(general.RedirPort, tunnel.Tunnel)
-	if !features.Contains("cmfa") {
+	if !features.CMFA {
 		listener.ReCreateAutoRedir(general.EBpf.AutoRedir, tunnel.Tunnel)
 	}
 	listener.ReCreateTProxy(general.TProxyPort, tunnel.Tunnel)

listener/http/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package http
 

listener/http/server.go

@@ -66,7 +66,7 @@ func NewWithAuthenticate(addr string, tunnel C.Tunnel, authenticate bool, additi
 				}
 				continue
 			}
-			if features.Contains("cmfa") {
+			if features.CMFA {
 				if t, ok := conn.(*net.TCPConn); ok {
 					t.SetKeepAlive(false)
 				}

main.go

@@ -48,8 +48,8 @@ func main() {
 	if version {
 		fmt.Printf("Mihomo Meta %s %s %s with %s %s\n",
 			C.Version, runtime.GOOS, runtime.GOARCH, runtime.Version(), C.BuildTime)
-		if len(features.TAGS) != 0 {
-			fmt.Printf("Use tags: %s\n", strings.Join(features.TAGS, ", "))
+		if tags := features.Tags(); len(tags) != 0 {
+			fmt.Printf("Use tags: %s\n", strings.Join(tags, ", "))
 		}
 
 		return

rules/provider/parse.go

@@ -63,7 +63,7 @@ func ParseRuleProvider(name string, mapping map[string]interface{}, parse func(t
 	case "http":
 		if schema.Path != "" {
 			path := C.Path.Resolve(schema.Path)
-			if !features.Contains("cmfa") && !C.Path.IsSafePath(path) {
+			if !features.CMFA && !C.Path.IsSafePath(path) {
 				return nil, fmt.Errorf("%w: %s", errSubPath, path)
 			}
 			vehicle = resource.NewHTTPVehicle(schema.URL, path)

rules/provider/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package provider
 

tunnel/statistic/patch_android.go

@@ -1,4 +1,4 @@
-// +build android,cmfa
+//go:build android && cmfa
 
 package statistic
 

tunnel/tunnel.go

@@ -621,7 +621,7 @@ func match(metadata *C.Metadata) (C.Proxy, C.Rule, error) {
 
 		if attemptProcessLookup && !findProcessMode.Off() && (findProcessMode.Always() || rule.ShouldFindProcess()) {
 			attemptProcessLookup = false
-			if !features.Contains("cmfa") {
+			if !features.CMFA {
 				// normal check for process
 				uid, path, err := P.FindProcessName(metadata.NetWork.String(), metadata.SrcIP, int(metadata.SrcPort))
 				if err != nil {