snell: init updateScript

pkgs/by-name/sn/snell/package.nix

@@ -2,50 +2,68 @@
   lib,
   stdenv,
   fetchzip,
-  autoPatchelfHook,
   upx,
+  autoPatchelfHook,
+  versionCheckHook,
+  writeShellScript,
+  nix-update,
 }:
-let
-  platformMap = {
-    "x86_64-linux" = "linux-amd64";
-    "aarch64-linux" = "linux-aarch64";
-  };
-  system = stdenv.hostPlatform.system;
-  platform = platformMap.${system} or (throw "Unsupported platform: ${system}");
-  hashs = {
-    "x86_64-linux" = "sha256-J2kRVJRC0GhxLMarg7Ucdk8uvzTsKbFHePEflPjwsHU=";
-    "aarch64-linux" = "sha256-UT+Rd6TEMYL/+xfqGxGN/tiSBvN8ntDrkCBj4PuMRwg=";
-  };
-in
+
 stdenv.mkDerivation (finalAttrs: {
   pname = "snell-server";
   version = "5.0.1";
 
-  src = fetchzip {
-    url = "https://dl.nssurge.com/snell/snell-server-v${finalAttrs.version}-${platform}.zip";
-    hash = hashs.${system};
-  };
+  src =
+    let
+      selectSystem = attrs: attrs.${stdenv.hostPlatform.system};
+      arch = selectSystem {
+        x86_64-linux = "amd64";
+        aarch64-linux = "aarch64";
+      };
+    in
+    fetchzip {
+      url = "https://dl.nssurge.com/snell/snell-server-v${finalAttrs.version}-linux-${arch}.zip";
+      hash = selectSystem {
+        x86_64-linux = "sha256-J2kRVJRC0GhxLMarg7Ucdk8uvzTsKbFHePEflPjwsHU=";
+        aarch64-linux = "sha256-UT+Rd6TEMYL/+xfqGxGN/tiSBvN8ntDrkCBj4PuMRwg=";
+      };
+    };
 
   nativeBuildInputs = [
     upx
     autoPatchelfHook
+    versionCheckHook
   ];
-  buildInputs = [
-    (lib.getLib stdenv.cc.cc)
-  ];
+
+  buildInputs = [ (lib.getLib stdenv.cc.cc) ];
+
   installPhase = ''
     runHook preInstall
+
     upx -d snell-server
     install -Dm755 snell-server $out/bin/snell-server
+
     runHook postInstall
   '';
 
+  doInstallCheck = true;
+
+  passthru.updateScript = writeShellScript "update-snell-server" ''
+    latestVersion=$(curl --fail --silent https://kb.nssurge.com/surge-knowledge-base/release-notes/snell | grep -oE 'snell-server-v[0-9]+\.[0-9]+\.[0-9]+' | sed 's/snell-server-v//' | sort -V | tail -n1)
+    if [[ "$latestVersion" == "$UPDATE_NIX_OLD_VERSION" ]]; then exit 0; fi
+    ${lib.getExe nix-update} pkgsCross.gnu64.snell --version "$latestVersion"
+    ${lib.getExe nix-update} pkgsCross.aarch64-multiplatform.snell --version skip
+  '';
+
   meta = {
     description = "Lean encrypted proxy protocol";
     homepage = "https://kb.nssurge.com/surge-knowledge-base/release-notes/snell";
     license = lib.licenses.unfree;
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
-    platforms = lib.attrNames platformMap;
+    platforms = [
+      "x86_64-linux"
+      "aarch64-linux"
+    ];
     maintainers = with lib.maintainers; [
       mlyxshi
     ];