Set up treemacs

emacs/init.org

@@ -767,13 +767,13 @@ Olivetti is a minor mode for a nice writing environment.
 * Winum
 This package includes functions to switch windows by number.
 #+BEGIN_SRC emacs-lisp
-  (defun winum-assign-0-to-neotree ()
-    (when (string-match-p (buffer-name) ".*\\NeoTree\\*.*") 10))
+  (defun winum-assign-0-to-treemacs ()
+    (when (string-match-p "Treemacs" (buffer-name)) 10))
 
   (use-package winum
     :config
     (winum-mode)
-    (add-to-list 'winum-assign-functions #'winum-assign-0-to-neotree)
+    (add-to-list 'winum-assign-functions #'winum-assign-0-to-treemacs)
     (leader-def-key "0" 'winum-select-window-0-or-10)
     (leader-def-key "1" 'winum-select-window-1)
     (leader-def-key "2" 'winum-select-window-2)
@@ -831,6 +831,36 @@ And while we're here let's enable all-the-icons for dired as well:
     (add-hook 'dired-mode-hook #'all-the-icons-dired-mode))
 #+END_SRC
 
+* Treemacs
+An alternative to NeoTree with fancy functionality:
+#+BEGIN_SRC emacs-lisp
+  (defun treemacs-ignore-pyc (name path)
+    (string-match-p ".*\\.pyc$" name))
+
+  (use-package treemacs
+    :config
+    (treemacs-follow-mode t)
+    (add-to-list 'treemacs-ignored-file-predicates #'treemacs-ignore-pyc)
+    (setq treemacs-project-follow-cleanup t
+	  treemacs-tag-follow-delay 0.5)
+    (with-eval-after-load 'treemacs-compatibility
+     (with-eval-after-load 'winum
+       (delete
+	(regexp-quote
+	 (format "%sFramebuffer-" treemacs--buffer-name-prefix))
+	winum-ignored-buffers-regexp))))
+
+  (use-package treemacs-evil
+    :after (treemacs evil))
+
+  (use-package treemacs-projectile
+    :after (treemacs projectile))
+
+  (use-package treemacs-magit
+    :after (treemacs magit))
+
+  (leader-def-key "d" #'treemacs)
+#+END_SRC
 * Backups and Autosaves
 Store backups and autosaves in a centralized place. This should really be the default...
 #+BEGIN_SRC emacs-lisp
@@ -3505,6 +3535,8 @@ Get a nice IMenu sidebar:
     (imenu-list-major-mode-map "SPC" leader-map)
     (imenu-list-major-mode-map "." #'imenu-list-display-entry))
 
+  (setq imenu-auto-rescan t)
+
   (leader-def-key "\\" #'imenu-list-smart-toggle)
   (leader-def-key "m" #'imenu)
 #+END_SRC