Julia: try adding precompile setting noci

Author: thomasjm

languages/julia/default.nix

@@ -17,6 +17,13 @@ let
   juliaWithPackages = callPackage ./julia-modules {};
 
   settingsSchema = [
+    {
+      target = "precompile";
+      title = "Precompile environment";
+      description = "Whether to precompile Julia code when building the environment for faster imports. In some cases, precompilation can make the build fail, so turning this off can help.";
+      type = "boolean";
+      defaultValue = true;
+    }
     {
       target = "lsp.LanguageServer.enable";
       title = "Enable LanguageServer language server";
@@ -131,7 +138,7 @@ mapAttrs (attr: value:
       let
         settingsToUse = (common.makeDefaultSettings settingsSchema) // settings;
 
-        julia = value (
+        julia = (value.override { inherit (settingsToUse) precompile; }) (
           ["IJulia"]
           ++ packages
           ++ lib.optionals (common.isTrue settingsToUse "lsp.LanguageServer.enable") ["LanguageServer" "SymbolServer"]

sample_environments/julia19.nix

@@ -13,7 +13,10 @@ codedown.mkCodeDownEnvironment {
       name = "julia19";
       channel = "codedown";
       args = {
-        packages = ["JSON3" "Plots"];
+        packages = ["JSON3" "Plots" "RDatasets"];
+        # settings = {
+        #   precompile = false;
+        # };
       };
     })
   ];