Android: patch

component/mmdb/mmdb.go

@@ -54,7 +54,7 @@ func Verify() bool {
 	return err == nil
 }
 
-func Instance() Reader {
+func DefaultInstance() Reader {
 	once.Do(func() {
 		mmdbPath := C.Path.MMDB()
 		log.Debugln("Load MMDB file: %s", mmdbPath)

component/mmdb/patch.go

@@ -0,0 +1,31 @@
+package mmdb
+
+import (
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
+	"github.com/oschwald/geoip2-golang"
+	"github.com/oschwald/maxminddb-golang"
+)
+
+var overrideMmdb *geoip2.Reader
+
+func InstallOverride(override *geoip2.Reader) {
+	overrideMmdb = overrideMmdb
+}
+
+func Instance() Reader {
+	once.Do(func() {
+		mmdb, err := maxminddb.Open(C.Path.MMDB())
+		if err != nil {
+			log.Fatalln("Can't load mmdb: %s", err.Error())
+		}
+		reader = Reader{Reader: mmdb}
+		if mmdb.Metadata.DatabaseType == "sing-geoip" {
+			reader.databaseType = typeSing
+		} else {
+			reader.databaseType = typeMaxmind
+		}
+	})
+
+	return reader
+}