sing-geoip: add rule-set

Update pkgs/data/misc/sing-geoip/default.nix

Co-authored-by: Aleksana <alexander.huang.y@gmail.com>

pkgs/data/misc/sing-geoip/default.nix

@@ -8,26 +8,32 @@
 let
   generator = buildGoModule rec {
     pname = "sing-geoip";
-    version = "20230512";
+    version = "20240312";
 
     src = fetchFromGitHub {
       owner = "SagerNet";
       repo = pname;
       rev = "refs/tags/${version}";
-      hash = "sha256-Zm+5N/37hoHpH/TLNJrHeaBXI8G1jEpM1jz6Um8edNE=";
+      hash = "sha256-nIrbiECK25GyuPEFqMvPdZUShC2JC1NI60Y10SsoWyY=";
     };
 
-    vendorHash = "sha256-ejXAdsJwXhqet+Ca+pDLWwu0gex79VcIxW6rmhRnbTQ=";
+    vendorHash = "sha256-WH0eMg06qCiVcy4H+vBtYrmLMA2KJRCPGXiEnatW+LU=";
+
+    postPatch = ''
+      sed -i -e '/func main()/,/^}/d' main.go
+      cat ${./main.go} >> main.go
+    '';
 
     meta = with lib; {
       description = "GeoIP data for sing-box";
       homepage = "https://github.com/SagerNet/sing-geoip";
       license = licenses.gpl3Plus;
       maintainers = with maintainers; [ linsui ];
+      mainProgram = "sing-geoip";
     };
   };
 in
-stdenvNoCC.mkDerivation rec {
+stdenvNoCC.mkDerivation {
   inherit (generator) pname;
   inherit (dbip-country-lite) version;
 
@@ -38,8 +44,7 @@ stdenvNoCC.mkDerivation rec {
   buildPhase = ''
     runHook preBuild
 
-    ${pname} ${dbip-country-lite.mmdb} geoip.db
-    ${pname} ${dbip-country-lite.mmdb} geoip-cn.db cn
+    sing-geoip ${dbip-country-lite.mmdb}
 
     runHook postBuild
   '';
@@ -49,6 +54,7 @@ stdenvNoCC.mkDerivation rec {
 
     install -Dm644 geoip.db $out/share/sing-box/geoip.db
     install -Dm644 geoip-cn.db $out/share/sing-box/geoip-cn.db
+    install -Dm644 rule-set/* -t $out/share/sing-box/rule-set
 
     runHook postInstall
   '';

pkgs/data/misc/sing-geoip/main.go

@@ -0,0 +1,68 @@
+func main() {
+	var err error
+
+  input := os.Args[1]
+  ruleSetOutput := "rule-set"
+
+  binary, err := os.ReadFile(input)
+	if err != nil {
+		panic(err)
+	}
+  metadata, countryMap, err := parse(binary)
+	if err != nil {
+		panic(err)
+	}
+	allCodes := make([]string, 0, len(countryMap))
+	for code := range countryMap {
+		allCodes = append(allCodes, code)
+	}
+
+	writer, err := newWriter(metadata, allCodes)
+	if err != nil {
+		panic(err)
+	}
+	err = write(writer, countryMap, "geoip.db", nil)
+	if err != nil {
+		panic(err)
+	}
+
+	writer, err = newWriter(metadata, []string{"cn"})
+	if err != nil {
+		panic(err)
+	}
+	err = write(writer, countryMap, "geoip-cn.db", []string{"cn"})
+	if err != nil {
+		panic(err)
+	}
+
+	err = os.MkdirAll(ruleSetOutput, 0o755)
+	if err != nil {
+		panic(err)
+	}
+	for countryCode, ipNets := range countryMap {
+		var headlessRule option.DefaultHeadlessRule
+		headlessRule.IPCIDR = make([]string, 0, len(ipNets))
+		for _, cidr := range ipNets {
+			headlessRule.IPCIDR = append(headlessRule.IPCIDR, cidr.String())
+		}
+		var plainRuleSet option.PlainRuleSet
+		plainRuleSet.Rules = []option.HeadlessRule{
+			{
+				Type:           C.RuleTypeDefault,
+				DefaultOptions: headlessRule,
+			},
+		}
+		srsPath, _ := filepath.Abs(filepath.Join(ruleSetOutput, "geoip-"+countryCode+".srs"))
+		os.Stderr.WriteString("write " + srsPath + "\n")
+		outputRuleSet, err := os.Create(srsPath)
+		if err != nil {
+			panic(err)
+		}
+		err = srs.Write(outputRuleSet, plainRuleSet)
+		if err != nil {
+			outputRuleSet.Close()
+			panic(err)
+		}
+		outputRuleSet.Close()
+	}
+}