Disable automatic scans in remote repositories, add option to re-renable

README.org

@@ -141,7 +141,9 @@ Helm and Ivy are also supported.  Note that the =helm= and =ivy= packages are no
 :CUSTOM_ID: TRAMP
 :END:
 
-=magit-todos= attempts to work in remote repositories accessed via TRAMP.  Note that if TRAMP can't find the scanner configured in =magit-todos-scanner=, you may need to use directory-local variables to either add the correct path to =tramp-remote-path= or choose a different scanner.
+Remote repositories (i.e. ones accessed via TRAMP) are not automatically scanned for to-dos unless option ~magit-todos-update-remote~ is enabled.  Otherwise, a scan may be manually initiated with the command ~magit-todos-update~.
+
+Note that if TRAMP can't find the scanner configured in option ~magit-todos-scanner~, you may need to use directory-local variables to either add the correct path to variable ~tramp-remote-path~ or choose a different scanner.
 
 * Changelog
 :PROPERTIES:
@@ -152,8 +154,10 @@ Helm and Ivy are also supported.  Note that the =helm= and =ivy= packages are no
 
 *Additions*
 + Branch-specific TODOs are also cached (to avoid rescanning when automatic updates are disabled.  This can improve performance in large repos).
++ Option ~magit-todos-upate-remote~ allows automatic scanning in remote repositories.  ([[https://github.com/alphapapa/magit-todos/pull/157][#157]].  Thanks to [[https://github.com/projectgus][Angus Gratton]].)
 
 *Changes*
++ Remote repositories are no longer automatically scanned (see new option ~magit-todos-update-remote~).
 + Option ~magit-todos-keyword-suffix~ defaults to allowing suffixes to be enclosed by parentheses or brackets (rather than just parentheses).
 + Minor improvements to warnings about files containing very long lines: display as messages instead of warnings, and signal errors from outside the process sentinel.
 

magit-todos.el

@@ -207,6 +207,14 @@ items."
                  (integer :tag "Automatically, but cache items for N seconds")
                  (const :tag "Manually" nil)))
 
+(defcustom magit-todos-update-remote nil
+  "Automatically scan in remote repositories.
+If nil, remote repos are only scanned when a manual scan is
+initiated (see command `magit-todos-update').  Remote repos
+include ones accessed via TRAMP (i.e. any path for which
+`file-remote-p' returns non-nil)."
+  :type 'boolean)
+
 (defcustom magit-todos-fontify-keyword-headers t
   "Apply keyword faces to group keyword headers."
   :type 'boolean)
@@ -711,38 +719,41 @@ Assumes current buffer is ITEM's buffer."
   "Insert to-do items into current buffer.
 This function should be called from inside a ‘magit-status’ buffer."
   (declare (indent defun))
-  (when magit-todos-active-scan
-    ;; Avoid running multiple scans for a single magit-status buffer.
-    (let ((buffer (process-buffer magit-todos-active-scan)))
-      (when (process-live-p magit-todos-active-scan)
-        (delete-process magit-todos-active-scan))
-      (when (buffer-live-p buffer)
-        (kill-buffer buffer)))
-    (setq magit-todos-active-scan nil))
-  (pcase magit-todos-update
-    ((or 't  ; Automatic
-         ;; Manual and updating now
-         (and 'nil (guard magit-todos-updating))
-         ;; Caching and cache expired
-         (and (pred integerp) (guard (or magit-todos-updating  ; Forced update
-                                         (>= (float-time
-                                              (time-subtract (current-time)
-                                                             magit-todos-last-update-time))
-                                             magit-todos-update)
-                                         (null magit-todos-last-update-time)))))
-     ;; Scan and insert.
-     ;; HACK: I don't like setting a special var here, because it seems like lexically binding a
-     ;; special var should follow down the chain, but it isn't working, so we'll do this.
-     (setq magit-todos-updating t)
-     (setq magit-todos-active-scan (funcall magit-todos-scanner
-                                            :callback #'magit-todos--insert-items
-                                            :magit-status-buffer (current-buffer)
-                                            :directory default-directory
-                                            :depth magit-todos-depth))
-     (magit-todos--maybe-insert-branch-todos 'rescan))
-    (_ ; Caching and cache not expired, or not automatic and not manually updating now
-     (magit-todos--insert-items (current-buffer) magit-todos-item-cache)
-     (magit-todos--maybe-insert-branch-todos 'cached))))
+  (when (or magit-todos-update-remote
+            magit-todos-updating
+            (not (file-remote-p default-directory)))
+    (when magit-todos-active-scan
+      ;; Avoid running multiple scans for a single magit-status buffer.
+      (let ((buffer (process-buffer magit-todos-active-scan)))
+        (when (process-live-p magit-todos-active-scan)
+          (delete-process magit-todos-active-scan))
+        (when (buffer-live-p buffer)
+          (kill-buffer buffer)))
+      (setq magit-todos-active-scan nil))
+    (pcase magit-todos-update
+      ((or 't                           ; Automatic
+           ;; Manual and updating now
+           (and 'nil (guard magit-todos-updating))
+           ;; Caching and cache expired
+           (and (pred integerp) (guard (or magit-todos-updating ; Forced update
+                                           (>= (float-time
+                                                (time-subtract (current-time)
+                                                               magit-todos-last-update-time))
+                                               magit-todos-update)
+                                           (null magit-todos-last-update-time)))))
+       ;; Scan and insert.
+       ;; HACK: I don't like setting a special var here, because it seems like lexically binding a
+       ;; special var should follow down the chain, but it isn't working, so we'll do this.
+       (setq magit-todos-updating t)
+       (setq magit-todos-active-scan (funcall magit-todos-scanner
+                                              :callback #'magit-todos--insert-items
+                                              :magit-status-buffer (current-buffer)
+                                              :directory default-directory
+                                              :depth magit-todos-depth))
+       (magit-todos--maybe-insert-branch-todos 'rescan))
+      (_ ; Caching and cache not expired, or not automatic and not manually updating now
+       (magit-todos--insert-items (current-buffer) magit-todos-item-cache)
+       (magit-todos--maybe-insert-branch-todos 'cached)))))
 
 (defun magit-todos--maybe-insert-branch-todos (&optional type)
   "Insert branch todos when appropriate.