oscar: Manage vscodium extensions with nix

oscar/configuration.nix

@@ -202,9 +202,32 @@
       ];
     };
 
-    programs.vscode = {
+    programs.vscode = let
+      extensionrepo =
+        (import (builtins.fetchGit {
+          url = "https://github.com/nix-community/nix-vscode-extensions";
+          ref = "refs/heads/master";
+        })).extensions.${builtins.currentSystem};
+    in {
       enable = true;
       package = pkgs.vscodium;
+      mutableExtensionsDir = false;
+      extensions = with extensionrepo.open-vsx; [ # TODO: -release ?
+        eamodio.gitlens
+        editorconfig.editorconfig
+        golang.go
+        jeandeaual.lilypond-syntax
+        jeandeaual.scheme
+        jeanp413.open-remote-ssh
+        jnoortheen.nix-ide
+        llvm-vs-code-extensions.vscode-clangd
+        ms-azuretools.vscode-docker
+        ms-python.debugpy
+        ms-python.python
+        rust-lang.rust-analyzer
+        stkb.rewrap
+        xaver.clang-format
+      ];
       userSettings = {
           "files.autoSave" = "afterDelay";
           "editor.renderWhitespace" = "boundary";