Enable hs-minor-mode in xml files

emacs/init.org

@@ -136,6 +136,11 @@ Make undo not undo paragraphs at a time:
   (setq evil-want-fine-undo t)
 #+END_SRC
 
+** Additional keybindings
+#+BEGIN_SRC emacs-lisp
+  (general-def 'normal "zM" #'hs-hide-level)
+#+END_SRC
+
 * Magit
 Magit is objectively the best Git interface.
 #+BEGIN_SRC emacs-lisp
@@ -1544,6 +1549,19 @@ Use LSP if [[https://github.com/mads-hartmann/bash-language-server][bash-languag
     :config
     (add-hook 'rust-mode-hook #'cargo-minor-mode))
 #+END_SRC
+* XML
+Set up hideshow for nXML mode:
+#+BEGIN_SRC emacs-lisp
+  (add-hook 'nxml-mode-hook #'hs-minor-mode)
+
+  (add-to-list 'hs-special-modes-alist
+	       '(nxml-mode
+		 "<!--\\|<[^/>]*[^/]>" ;; regexp for start block
+		 "-->\\|</[^/>]*[^/]>" ;; regexp for end block
+		 "<!--"
+		 nxml-forward-element
+		 nil))
+#+END_SRC
 * CSVs
 #+BEGIN_SRC emacs-lisp
   (use-package csv-mode