[github-copilot] Fix activation for holy-mode

Completions were disabled by default due to `holy-mode` permanently activating
`evil-emacs-state`.

layers/+web-services/github-copilot/funcs.el

@@ -0,0 +1,29 @@
+;;; funcs.el --- GitHub Copilot Layer functions file for Spacemacs -*- lexical-binding: t; -*-
+;;
+;; Copyright (c) 2024-2025 Sylvain Benner & Contributors
+;;
+;; Author: Ferdinand Nussbaum <[email protected]>
+;; URL: https://github.com/syl20bnr/spacemacs
+;;
+;; This file is not part of GNU Emacs.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+(defun spacemacs//copilot-enable-predicate ()
+  "Copilot is by default only enabled in `evil-insert-state', not in `evil-emacs-state',
+see the default value of `copilot-enable-predicates'.
+In `holy-mode', we enable `evil-emacs-state' permanently, hence this workaround."
+  (or (not (bound-and-true-p evil-local-mode))
+      (bound-and-true-p holy-mode)
+      (evil-insert-state-p)))

layers/+web-services/github-copilot/packages.el

@@ -29,4 +29,7 @@
 
 (defun github-copilot/init-copilot ()
   (use-package copilot
+    :custom
+    (copilot-enable-predicates '(spacemacs//copilot-enable-predicate
+                                 copilot--buffer-changed))
     :defer t))