Add tempel as the yasnippet replacement

nix/modules/editor/default.nix

@@ -46,6 +46,8 @@ let
       org-ql
       org-modern
       base16-theme
+      tempel
+      tempel-collection
     ]);
 
   drv = makeFG42Drv {

nix/modules/editor/lisp/fg42/editor.el

@@ -26,17 +26,6 @@
   ;; We build this file via the main FG42's Nix derivation. It
   ;; contains the final Nix configuration of FG42.
   (require 'fg42/config)
-  ;; ;; Language support
-  ;; (require 'fg42/autocomplete)
-  ;; (require 'fg42/langs/langs)
-  ;; (require 'fg42/eglot)
-  ;; (require 'fg42/langs/cpp)
-  ;; (require 'fg42/langs/verilog)
-  ;; (require 'fg42/langs/python)
-  ;; (require 'fg42/langs/elisp)
-  ;; (require 'fg42/langs/nix)
-
-  ;; (require 'fg42/wm)
   (require 'fg42/organize))
 
 (require 'server)
@@ -53,7 +42,6 @@
     (set-face-attribute 'default t :font name)))
 
 
-
 (use! origami
   "A text folding minor mode for Emacs."
   :bind
@@ -61,6 +49,7 @@
   :config
   (global-origami-mode t))
 
+
 (use! which-key
   "which-key is a minor mode for Emacs that displays the key bindings following
 your currently entered incomplete command (a prefix) in a popup. For example,
@@ -72,6 +61,7 @@ This includes prefixes like ~C-x 8~ which are shown in a different face."
   (which-key-setup-side-window-bottom)
   (which-key-mode))
 
+
 (use! projectile
   "Projectile is a project interaction library for Emacs. Its goal is to provide
 a nice set of features operating on a project level without introducing
@@ -112,44 +102,53 @@ contextual information."
    ("C-h x" . helpful-command)
    ("C-c C-d" . helpful-at-point)))
 
+
 (use! envrc
   "Activate direnv whenever encounter a `.envrc' file"
   :config
   (envrc-global-mode))
 
+
 (use! pinentry
   "Pinentry cube with setup the =pinentry= program to be used within FG42."
   :commands pinentry-start
   :init
   (setq epa-pinentry-mode 'loopback))
 
+
 (use! imenu-list
   "his Emacs minor-mode creates an automatically updated buffer
  called `Ilist' that is populated with the current buffer's imenu entries.
  The `Ilist' buffer is typically shown as a sidebar (Emacs vertically splits the window)."
   :bind  (("C-'" . imenu-list-smart-toggle)))
 
+
 (use! discover
   "Adds support for the discover.el `https://github.com/mickeynp/discover.el'.")
 
+
 (use! exec-path-from-shell
   "This package fixes the =exec-path-from-shell= issue on MacOS."
   :config
   (when (memq window-system '(mac ns x))
     (exec-path-from-shell-initialize)))
 
+
 (use! hl-line
   "Highlights the current line."
   :hook (emacs-startup . global-hl-line-mode))
 
+
 (use! avy
   "This cube controls the different aspect of buffer navigation"
   :bind ("M-1" . avy-goto-word-1))
 
+
 (use! ace-window
   "This cube controls the different aspect of buffer navigation"
   :bind ("C-<tab>" . ace-window))
 
+
 (when-not-wm
  (use! flyspell
    "Spell checking on the fly"
@@ -165,6 +164,7 @@ contextual information."
    :init
    (savehist-mode))
 
+
  (use! display-line-numbers
    "The builtin replacement of linum. It's is pretty fast."
    :config
@@ -175,6 +175,7 @@ contextual information."
   "Flycheck is a modern on-the-fly syntax checking extension for GNU Emacs."
   :config (global-flycheck-mode))
 
+
 (use! rainbow-delimiters
   "It is a rainbow parentheses like mode which highlights delimiters such as
  parentheses, brackets or braces according to their depth."
@@ -188,6 +189,37 @@ contextual information."
   (direnv-mode))
 
 
+(use! tempel
+  "Tempel is a tiny template package for Emacs, which uses the syntax
+of the Emacs Tempo library."
+  :bind (("M-+" . tempel-complete) ;; Alternative tempel-expand
+         ("M-*" . tempel-insert)
+         ("C-," . tempel-previous)
+         ("C-." . tempel-next))
+
+  :init
+  ;; Setup completion at point
+  (defun tempel-setup-capf ()
+    ;; Add the Tempel Capf to `completion-at-point-functions'.
+    ;; `tempel-expand' only triggers on exact matches. Alternatively use
+    ;; `tempel-complete' if you want to see all matches, but then you
+    ;; should also configure `tempel-trigger-prefix', such that Tempel
+    ;; does not trigger too often when you don't expect it. NOTE: We add
+    ;; `tempel-expand' *before* the main programming mode Capf, such
+    ;; that it will be tried first.
+    (setq-local completion-at-point-functions
+                (cons #'tempel-expand
+                      completion-at-point-functions)))
+
+  (add-hook 'conf-mode-hook 'tempel-setup-capf)
+  (add-hook 'prog-mode-hook 'tempel-setup-capf)
+  (add-hook 'text-mode-hook 'tempel-setup-capf))
+
+
+(use! tempel-collection
+  "A collection of tempel templates.")
+
+
 (defun fg42/setup-editor ()
   "Setup the overall functionality of FG42."