chore: 优化GeoSite初始化代码

rule/common/geosite.go

@@ -2,19 +2,18 @@ package common
 
 import (
 	"fmt"
-	"io"
-	"net/http"
-	"os"
-
 	"github.com/Dreamacro/clash/component/geodata"
+	_ "github.com/Dreamacro/clash/component/geodata/memconservative"
 	"github.com/Dreamacro/clash/component/geodata/router"
+	_ "github.com/Dreamacro/clash/component/geodata/standard"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/log"
-
-	_ "github.com/Dreamacro/clash/component/geodata/memconservative"
-	_ "github.com/Dreamacro/clash/component/geodata/standard"
+	_ "unsafe"
 )
 
+//go:linkname initGeoSite github.com/Dreamacro/clash/config.initGeoSite
+func initGeoSite() error
+
 type GEOSITE struct {
 	*Base
 	country    string
@@ -80,45 +79,3 @@ func NewGEOSITE(country string, adapter string) (*GEOSITE, error) {
 }
 
 var _ C.Rule = (*GEOSITE)(nil)
-
-func downloadGeoSite(path string) (err error) {
-	resp, err := http.Get(C.GeoSiteUrl)
-	if err != nil {
-		return
-	}
-	defer resp.Body.Close()
-
-	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0o644)
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-	_, err = io.Copy(f, resp.Body)
-
-	return err
-}
-
-func initGeoSite() error {
-	if _, err := os.Stat(C.Path.GeoSite()); os.IsNotExist(err) {
-		log.Infoln("Can't find GeoSite.dat, start download")
-		if err := downloadGeoSite(C.Path.GeoSite()); err != nil {
-			return fmt.Errorf("can't download GeoSite.dat: %s", err.Error())
-		}
-		log.Infoln("Download GeoSite.dat finish")
-	}
-	if !initFlag {
-		err := geodata.Verify(C.GeositeName)
-		if err != nil {
-			log.Warnln("GeoSite.dat invalid, remove and download: %s", err)
-			if err := os.Remove(C.Path.GeoSite()); err != nil {
-				return fmt.Errorf("can't remove invalid GeoSite.dat: %s", err.Error())
-			}
-			if err := downloadGeoSite(C.Path.GeoSite()); err != nil {
-				return fmt.Errorf("can't download GeoSite.dat: %s", err.Error())
-			}
-		} else {
-			initFlag = true
-		}
-	}
-	return nil
-}