plugins/copilot: rename copilot -> copilot-vim

plugins/completion/copilot-vim.nix

@@ -0,0 +1,65 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.plugins.copilot-vim;
+  helpers = import ../helpers.nix {inherit lib;};
+in {
+  imports = [
+    (lib.mkRenamedOptionModule ["plugins" "copilot"] ["plugins" "copilot-vim"])
+  ];
+
+  options = {
+    plugins.copilot-vim = {
+      enable = mkEnableOption "copilot.vim";
+
+      package = helpers.mkPackageOption "copilot.vim" pkgs.vimPlugins.copilot-vim;
+
+      filetypes = mkOption {
+        type = types.attrsOf types.bool;
+        description = "A dictionary mapping file types to their enabled status";
+        default = {};
+        example = literalExpression ''
+          {
+            "*" = false;
+            python = true;
+          }
+        '';
+      };
+
+      proxy = helpers.defaultNullOpts.mkStr "" ''
+        Tell Copilot what proxy server to use.
+        Example: "localhost:3128"
+      '';
+
+      extraConfig = mkOption {
+        type = types.attrs;
+        description = ''
+          The configuration options for copilot without the 'copilot_' prefix.
+          Example: To set 'copilot_foo_bar' to 1, write
+            extraConfig = {
+              foo_bar = true;
+            };
+        '';
+        default = {};
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    extraPlugins = [cfg.package];
+
+    globals = with cfg;
+      mapAttrs' (name: nameValuePair ("copilot_" + name))
+      (
+        {
+          node_command = "${pkgs.nodejs-18_x}/bin/node";
+          inherit filetypes proxy;
+        }
+        // cfg.extraConfig
+      );
+  };
+}

plugins/completion/copilot.nix

@@ -1,46 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}:
-with lib; let
-  cfg = config.plugins.copilot;
-  helpers = import ../helpers.nix {inherit lib;};
-in {
-  options = {
-    plugins.copilot = {
-      enable = mkEnableOption "copilot";
-      package = helpers.mkPackageOption "copilot" pkgs.vimPlugins.copilot-vim;
-      filetypes = mkOption {
-        type = types.attrsOf types.bool;
-        description = "A dictionary mapping file types to their enabled status";
-        default = {};
-        example = literalExpression ''          {
-                    "*": false,
-                    python: true
-                  }'';
-      };
-      proxy = mkOption {
-        type = types.nullOr types.str;
-        description = "Tell Copilot what proxy server to use.";
-        default = null;
-        example = "localhost:3128";
-      };
-    };
-  };
-
-  config = mkIf cfg.enable {
-    extraPlugins = [cfg.package];
-    globals =
-      {
-        copilot_node_command = "${pkgs.nodejs-18_x}/bin/node";
-        copilot_filetypes = cfg.filetypes;
-      }
-      // (
-        if cfg.proxy != null
-        then {copilot_proxy = cfg.proxy;}
-        else {}
-      );
-  };
-}

plugins/default.nix

@@ -15,7 +15,7 @@
 
     ./completion/coq.nix
     ./completion/coq-thirdparty.nix
-    ./completion/copilot.nix
+    ./completion/copilot-vim.nix
     ./completion/nvim-cmp
     ./completion/nvim-cmp/sources
     ./completion/lspkind.nix

tests/test-sources/plugins/completion/copilot-vim.nix

@@ -0,0 +1,18 @@
+{
+  empty = {
+    plugins.copilot-vim.enable = true;
+  };
+
+  example = {
+    plugins.copilot-vim = {
+      enable = true;
+
+      filetypes = {
+        "*" = false;
+        python = true;
+      };
+
+      proxy = "localhost:3128";
+    };
+  };
+}