pureref 2, added pkg to load source file

pkgs/pureref/default.nix

@@ -1,37 +1,25 @@
 {
   lib,
   appimageTools,
-  runCommand,
-  curl,
-  gnugrep,
-  cacert,
+  requireFile,
 }:
 
 appimageTools.wrapType1 rec {
   pname = "pureref";
-  version = "2.0.0";
+  version = "2.0.3";
 
-  src =
-    runCommand "PureRef-${version}_x64.Appimage"
-      {
-        nativeBuildInputs = [
-          curl
-          gnugrep
-          cacert
-        ];
-        outputHash = "sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=";
-      }
-      ''
-        key="$(curl "https://www.pureref.com/download.php" --silent | grep '%3D%3D' | cut -d '"' -f2)"
-        curl "https://www.pureref.com/files/build.php?build=LINUX64.Appimage&version=${version}&downloadKey=$key" --output $out
-      '';
+  src = requireFile {
+    name = "PureRef-${version}_x64.Appimage";
+    sha256 = "d2247570fdac66f596a8ac11030aba2ff6e62014981caae523cbbc57684035f3";
+    url = "https://www.pureref.com/download.php";
+  };
 
-  meta = {
+  meta = with lib; {
     description = "Reference Image Viewer";
     homepage = "https://www.pureref.com";
-    license = lib.licenses.unfree;
-    maintainers = [ lib.maintainers.elnudev ];
+    license = licenses.unfree;
+    maintainers = with maintainers; [ elnudev ];
     platforms = [ "x86_64-linux" ];
-    sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
+    sourceProvenance = [ sourceTypes.binaryNativeCode ];
   };
 }