[html] Make leex support optional

layers/+lang/html/README.org

@@ -12,6 +12,7 @@
   - [[#web-beautify][web-beautify]]
   - [[#prettier][prettier]]
   - [[#choosing-a-formatter][Choosing a formatter]]
+  - [[#activate-leex-support][Activate leex support]]
 - [[#backends][Backends]]
   - [[#language-server-protocol][Language Server Protocol]]
 - [[#live-display-in-browser][Live display in browser]]
@@ -78,6 +79,14 @@ Formatter can be chosen on a per project basis using directory local variables
 
 *Note:* you can easily add a directory local variable with ~SPC f v d~.
 
+** Activate leex support
+To activate support for ~.leex~ files set below config variable to a
+non-nil value.
+
+#+BEGIN_SRC elisp
+  (html :variables html-enable-leex-support t)
+#+END_SRC
+
 * Backends
 ** Language Server Protocol
 For css files, you have to install =vscode-css-languageserver-bin=

layers/+lang/html/config.el

@@ -40,3 +40,6 @@
 
 (defvar html-enable-lsp nil
   "If non-nil, enable lsp-mode in web-mode html buffers having.")
+
+(defvar html-enable-leex-support nil
+  "If non nil, enable support for `.leex' files.")

layers/+lang/html/packages.el

@@ -209,7 +209,9 @@
     (progn
       (spacemacs//web-setup-transient-state)
       (when html-enable-lsp
-        (add-hook 'web-mode-hook #'spacemacs//setup-lsp-for-html-buffer t)))
+        (add-hook 'web-mode-hook #'spacemacs//setup-lsp-for-html-buffer t))
+      (when html-enable-leex-support
+        (add-to-list 'auto-mode-alist '("\\.leex\\'" . web-mode))))
     :config
     (progn
       (spacemacs/declare-prefix-for-mode 'web-mode "m=" "format")
@@ -231,7 +233,6 @@
         "rw" 'web-mode-element-wrap
         "z" 'web-mode-fold-or-unfold))
     ;; TODO element close would be nice but broken with evil.
-
     :mode
     (("\\.phtml\\'"      . web-mode)
      ("\\.tpl\\.php\\'"  . web-mode)
@@ -242,7 +243,6 @@
      ("\\.[gj]sp\\'"     . web-mode)
      ("\\.as[cp]x?\\'"   . web-mode)
      ("\\.eex\\'"        . web-mode)
-     ("\\.leex\\'"       . web-mode)
      ("\\.erb\\'"        . web-mode)
      ("\\.mustache\\'"   . web-mode)
      ("\\.handlebars\\'" . web-mode)