forge--pull(gitlab): Add optional CALLBACK argument

This argument was added to the github method in [1: 896a934]
and since [2: 02cd283] all methods must make it available.

Closes #622.

1: 2019-11-05 896a934
   forge--pull(github): Add optional CALLBACK argument

2: 2024-01-26 02cd283
   forge--set-field-callback: Also refresh tablist and transient menu

lisp/forge-gitlab.el

@@ -47,7 +47,8 @@
 ;;; Pull
 ;;;; Repository
 
-(cl-defmethod forge--pull ((repo forge-gitlab-repository) until)
+(cl-defmethod forge--pull ((repo forge-gitlab-repository) until
+                           &optional callback)
   (let ((cb (let ((buf (and (derived-mode-p 'magit-mode)
                             (current-buffer)))
                   (dir default-directory)
@@ -81,8 +82,10 @@
                       (dolist (v .pullreqs) (forge--update-pullreq repo v))
                       (oset repo sparse-p nil))
                     (forge--msg repo t t "Storing REPO")
-                    (unless (oref repo selective-p)
-                      (forge--git-fetch buf dir repo)))))))))
+                    (cond
+                     ((oref repo selective-p))
+                     (callback (funcall callback))
+                     ((forge--git-fetch buf dir repo))))))))))
     (funcall cb cb)))
 
 (cl-defmethod forge--fetch-repository ((repo forge-gitlab-repository) callback)