[Compatibility] Persist all tramp-based paths as is.

src/elisp/treemacs-compatibility.el

@@ -28,6 +28,7 @@
 (require 'treemacs-scope)
 (require 'treemacs-core-utils)
 (require 'treemacs-interface)
+(require 'treemacs-persistence)
 
 (eval-when-compile
   (require 'treemacs-macros))
@@ -38,10 +39,13 @@
  (push '(treemacs-workspace . :never) frameset-filter-alist))
 
 (with-eval-after-load 'tramp
-  (setf treemacs--file-name-handler-alist
-        (with-no-warnings
-          (list
-           (cons tramp-file-name-regexp #'tramp-file-name-handler)))))
+  (setf
+   treemacs--no-abbr-on-persist-prefixes
+   (--map (format "/%s:" (car it)) (with-no-warnings tramp-methods))
+   treemacs--file-name-handler-alist
+   (with-no-warnings
+     (list
+      (cons tramp-file-name-regexp #'tramp-file-name-handler)))))
 
 (with-eval-after-load 'recentf
   (with-no-warnings

src/elisp/treemacs-persistence.el

@@ -62,6 +62,10 @@
                (:constructor treemacs-iter->create!))
   list)
 
+(defvar treemacs--no-abbr-on-persist-prefixes nil
+  "Prefixes for paths that should be saved as is, without `abbreviate-file-name'.
+Set the all the `tramp-methods', after it has been loaded.'")
+
 (define-inline treemacs-iter->next! (self)
   "Get the next element of iterator SELF.
 
@@ -201,7 +205,7 @@ ITER: Treemacs-Iter Struct"
                 (push (format
                        " - path :: %s\n"
                        (-let [path (treemacs-project->path pr)]
-                         (if (string-prefix-p "/ssh:" path)
+                         (if (--any? (string-prefix-p it path) treemacs--no-abbr-on-persist-prefixes)
                              path
                            (abbreviate-file-name path))))
                       txt)))