Allow auto-formatting of files to be controlled (#1254)

core/prelude-custom.el

@@ -82,6 +82,12 @@ in the desired elisp file."
   :type 'list
   :group 'prelude)
 
+(defcustom prelude-format-on-save t
+  "Run mode specific format on file before it's saved.
+Currently only applies to tide-mode."
+  :type 'boolean
+  :group 'prelude)
+
 (defcustom prelude-yank-indent-modes '(LaTeX-mode TeX-mode)
   "Modes in which to indent regions that are yanked (or yank-popped).
 Only modes that don't derive from `prog-mode' should be listed here."

doc/configuration.md

@@ -113,11 +113,6 @@ cleanup your file on save, you can disable that behavior by setting
 (setq prelude-clean-whitespace-on-save nil)
 ```
 
-The `prelude-clean-whitespace-on-save` setting can also be set on a
-per-file or directory basis by using a file variable or a
-`.dir-locals.el` file.
-
-
 ### Disable flyspell-mode
 
 If you're not fond of spellchecking on the fly:
@@ -125,3 +120,19 @@ If you're not fond of spellchecking on the fly:
 ```lisp
 (setq prelude-flyspell nil)
 ```
+
+### Disable automatic formatting on save
+
+If you prefer not to automatically format your file on save, you can disable that behavior by setting
+`prelude-format-on-save` to `nil` in your config file with:
+
+```lisp
+(setq prelude-format-on-save nil)
+```
+
+Currently this only affects automated formatting of Typescript files.
+
+### Configuration per file or directory
+
+These settings can also be set on a per-file or directory basis by using a file local variable or a `.dir-locals.el`
+file.

modules/prelude-ts.el

@@ -48,7 +48,10 @@
     (tide-hl-identifier-mode +1))
 
   ;; formats the buffer before saving
-  (add-hook 'before-save-hook 'tide-format-before-save)
+  (add-hook 'before-save-hook
+            (lambda ()
+              (when prelude-format-on-save
+                (tide-format-before-save))))
 
   (setq prelude-ts-mode-hook 'prelude-ts-mode-defaults)