added jgd

packages/default.nix

@@ -1,33 +1,37 @@
 {
   final,
   prev,
-}:
-let
+}: let
   # Shared helper function to fetch from GitHub using JSON version files
   fetchfromGitHubJSONFile = path: prev.fetchFromGitHub (builtins.fromJSON (builtins.readFile path));
-  
+
   # Reference to the versions directory at the repo root
   versionsDir = ../versions;
-  
+
   # Common arguments passed to package modules that don't need 'final'
   baseArgs = {
     inherit prev fetchfromGitHubJSONFile versionsDir;
   };
-  
+
   # Arguments for packages that need access to 'final' (for cross-package dependencies)
-  argsWithFinal = baseArgs // {
-    inherit final;
-  };
+  argsWithFinal =
+    baseArgs
+    // {
+      inherit final;
+    };
 in {
   ## F
   fwildclusterboot = import ./f/fwildclusterboot.nix argsWithFinal;
-  
+
   ## H
   httpgd = import ./h/httpgd.nix baseArgs;
-  
+
+  ## J
+  jgd = import ./j/jgd.nix (baseArgs // {lib = prev.lib;});
+
   ## M
   musicMetadata = import ./m/musicMetadata.nix baseArgs;
-  
+
   ## S
   summclust = import ./s/summclust.nix baseArgs;
   synthdid = import ./s/synthdid.nix baseArgs;

packages/j/jgd.nix

@@ -0,0 +1,25 @@
+{
+  lib,
+  prev,
+  fetchfromGitHubJSONFile,
+  versionsDir,
+}: let
+  repoSrc = fetchfromGitHubJSONFile "${versionsDir}/jgd.json";
+
+  rPkgSrc = lib.cleanSourceWith {
+    src = repoSrc;
+    filter = path: type: let
+      p = toString path;
+    in
+      # keep r-pkg/ and everything under it
+      (lib.hasPrefix (toString repoSrc + "/r-pkg") p);
+  };
+in
+  prev.rPackages.buildRPackage {
+    name = "jgd";
+    src = rPkgSrc;
+    sourceRoot = "source/r-pkg";
+    nativeBuildInputs = [
+      prev.pkg-config
+    ];
+  }