Unify hook modifications

Now i use `add-hook` only if not within a `use-package` block; otherwise, i use `:hook`.

configuration.org

@@ -1307,15 +1307,19 @@ For in-Emacs browsing needs.
 
 ** Which function am I in?
 
+#+BEGIN_SRC emacs-lisp
+(defun gpolonkai/activate-which-func-mode ()
+  (if (fboundp 'which-function-mode)
+      (which-function-mode)
+    (which-func-mode)))
+#+END_SRC
+
 #+BEGIN_SRC emacs-lisp
 (use-package which-func
   :config
-  (add-hook 'prog-mode-hook
-            (lambda ()
-              (if (fboundp 'which-function-mode)
-                  (which-function-mode)
-                (which-func-mode))))
-  (setq which-func-unknown "∅"))
+  (setq which-func-unknown "∅")
+  :hook
+  (prog-mode . gpolonkai/activate-which-func-mode))
 #+END_SRC
 
 ** Fortune cookies
@@ -1443,7 +1447,8 @@ I don’t usually like to see them, but there are occasions when they can be use
         auto-package-update-delete-old-versions t)
   ;; Let’s do this in after-init-hook, as use-package invocations may modify
   ;; the list of installed packages
-  (add-hook 'after-init-hook 'auto-package-update-maybe))
+  :hook
+  (after-init . auto-package-update-maybe))
 #+END_SRC
 
 ** Nyanyanyanyanya
@@ -1533,8 +1538,8 @@ Highlight point.  Sometimes it’s not easy to see.
 #+BEGIN_SRC emacs-lisp
 (when (display-graphic-p)
   (use-package eshell-fringe-status
-    :config
-    (add-hook 'eshell-mode-hook 'eshell-fringe-status-mode)))
+    :hook
+    (eshell-mode . eshell-fringe-status-mode)))
 #+END_SRC
 
 *** Extras for the EShell prompt
@@ -1554,8 +1559,8 @@ Highlight point.  Sometimes it’s not easy to see.
 
 #+BEGIN_SRC emacs-lisp
 (use-package form-feed
-  :config
-  (add-hook 'emacs-lisp-mode-hook 'form-feed-mode))
+  :hook
+  (emacs-lisp-mode . form-feed-mode))
 #+END_SRC
 
 ** Highlight the current line
@@ -1570,15 +1575,13 @@ Highlight point.  Sometimes it’s not easy to see.
 ** GNU Globals
 
 #+BEGIN_SRC emacs-lisp
+(defun gpolonkai/cond-enable-ggtags-mode ()
+  (when (derived-mode-p 'c-mode 'c++-mode 'java-mode)
+    (ggtags-mode t)))
+
 (use-package ggtags
-  :config
-  (add-hook 'c-mode-hook
-            (lambda ()
-              (ggtags-mode t)))
-  (add-hook 'c-mode-common-hook
-            (lambda ()
-              (when (derived-mode-p 'c-mode 'c++-mode 'java-mode)
-                (ggtags-mode t)))))
+  :hook
+  (c-mode-common . gpolonkai/cond-enable-ggtags-mode))
 #+END_SRC
 
 ** Multiple cursors
@@ -1586,19 +1589,21 @@ Highlight point.  Sometimes it’s not easy to see.
 Because one is never enough.
 
 #+BEGIN_SRC emacs-lisp
+(defun gpolonkai/no-blink-matching-paren ()
+  (setq blink-matching-paren nil))
+
+(defun gpolonkai/blink-matching-paren ()
+  (setq blink-matching-paren t))
+
 (use-package multiple-cursors
   :init
   (defvar gpolonkai/mc-prefix-map (make-sparse-keymap)
     "Prefix keymap for multiple-cursors")
   (define-prefix-command 'gpolonkai/mc-prefix-map)
   (define-key global-map (kbd "C-c m") 'gpolonkai/mc-prefix-map)
-  :config
-  (add-hook 'multiple-cursors-mode-enabled-hook
-            (lambda ()
-              (setq blink-matching-paren nil)))
-  (add-hook 'multiple-cursors-mode-disabled-hook
-            (lambda ()
-              (setq blink-matching-paren t)))
+  :hook
+  (multiple-cursors-mode-enabled . gpolonkai/no-blink-matching-paren)
+  (multiple-cursors-mode-disabled . gpolonkai/blink-matching-paren)
   :bind (:map gpolonkai/mc-prefix-map
          ("t" . mc/mark-all-like-this)
          ("m" . mc/mark-all-like-this-dwim)
@@ -1650,13 +1655,10 @@ Because one is never enough.
         magit-push-always-verify nil)
   :bind
   (:map ctl-x-map
-   ("g" . magit-status)))
-#+END_SRC
+   ("g" . magit-status))
+  :hook
+  (git-commit-mode . turn-on-flyspell))
 
-I also want FlySpell to be enabled during Git commit message editing.
-
-#+BEGIN_SRC emacs-lisp
-(add-hook 'git-commit-mode-hook 'turn-on-flyspell)
 #+END_SRC
 
 ** Zone
@@ -1704,10 +1706,9 @@ I also want FlySpell to be enabled during Git commit message editing.
   :demand
   :config
   (show-smartparens-global-mode t)
-  (add-hook 'prog-mode-hook
-            'turn-on-smartparens-strict-mode)
-  (add-hook 'markdown-mode-hook
-            'turn-on-smartparens-strict-mode)
+  :hook
+  (prog-mode . turn-on-smartparens-strict-mode)
+  (markdown-mode . turn-on-smartparens-strict-mode)
   :bind
   (([f9] . smartparens-strict-mode)
    ("C-c s u" . sp-unwrap-sexp)
@@ -1845,10 +1846,10 @@ To highlight colours based on their name or hex code.
 
 #+BEGIN_SRC emacs-lisp
 (use-package rainbow-mode
-  :config
-  (add-hook 'css-mode-hook 'rainbow-mode)
-  (add-hook 'scss-mode-hook 'rainbow-mode)
-  (add-hook 'sass-mode 'rainbow-mode))
+  :hook
+  (css-mode . rainbow-mode)
+  (scss-mode . rainbow-mode)
+  (sass-mode . rainbow-mode))
 #+END_SRC
 
 ** Zygospore
@@ -1952,11 +1953,9 @@ For all your spell-checking needs.
 
 #+BEGIN_SRC emacs-lisp
 (use-package flyspell
-  :config
-  (add-hook 'prog-mode-hook
-            'flyspell-prog-mode)
-  (add-hook 'text-mode-hook
-            'flyspell-mode))
+  :hook
+  (prog-mode . flyspell-prog-mode)
+  (text-mode . flyspell-mode))
 #+END_SRC
 
 ** Delete all the whitespace
@@ -2036,10 +2035,10 @@ Because even secretaries need a secretary today.
 (use-package secretaria
   :after
   alert
-  :config
+  :hook
   ;; use this for getting a reminder every 30 minutes of those tasks
   ;; scheduled for today and which have no time of day defined.
-  (add-hook 'after-init-hook #'secretaria-unknown-time-always-remind-me))
+  (after-init . secretaria-unknown-time-always-remind-me))
 #+END_SRC
 
 ** The Silver Searcher
@@ -2264,8 +2263,8 @@ mode.
 
 #+BEGIN_SRC emacs-lisp
 (use-package electric-case
-  :config
-  (add-hook 'c-mode-hook 'electric-case-c-init))
+  :hook
+  (c-mode . electric-case-c-init))
 #+END_SRC
 
 ** Electric operator
@@ -2275,10 +2274,11 @@ Automatically add spaces around operators.
 #+BEGIN_SRC emacs-lisp
 (use-package electric-operator
   :config
-  (add-hook 'c-mode-common-hook 'electric-operator-mode)
   ;; Apply electric-operator-mode to vala-mode, too
   (apply #'electric-operator-add-rules-for-mode 'vala-mode
-         (electric-operator-get-rules-for-mode 'prog-mode)))
+         (electric-operator-get-rules-for-mode 'prog-mode))
+  :hook
+  (c-mode-common . electric-operator-mode))
 #+END_SRC
 
 ** Yasnippets
@@ -2288,7 +2288,8 @@ Automatically add spaces around operators.
   :demand
   :config
   (yas-global-mode 1)
-  (add-hook 'post-command-hook 'sachachua/change-cursor-color-when-can-expand))
+  :hook
+  (post-command . sachachua/change-cursor-color-when-can-expand))
 #+END_SRC
 
 *** Extra snippets for Vala
@@ -2309,9 +2310,8 @@ Automatically add spaces around operators.
 
 #+BEGIN_SRC emacs-lisp
 (use-package rainbow-delimiters
-  :config
-  (add-hook 'prog-mode-hook
-            #'rainbow-delimiters-mode))
+  :hook
+  (prog-mode . rainbow-delimiters-mode))
 #+END_SRC
 
 ** REST Client
@@ -2335,8 +2335,8 @@ A big help during refactoring.
 #+BEGIN_SRC emacs-lisp
 (use-package glasses
   :delight " 👓"
-  :config
-  (add-hook 'prog-mode-hook 'glasses-mode))
+  :hook
+  (prog-mode . glasses-mode))
 #+END_SRC
 
 ** GObject boilerplate generator
@@ -2389,19 +2389,18 @@ Maybe add ∉ for ~not in~ later, if possible.
 
 #+BEGIN_SRC emacs-lisp
 (use-package auto-virtualenv
-  :config
-  (add-hook 'python-mode-hook 'auto-virtualenv-set-virtualenv)
-  (add-hook 'projectile-after-switch-project-hook
-            'auto-virtualenv-set-virtualenv))
+  :hook
+  (python-mode . auto-virtualenv-set-virtualenv)
+  (projectile-after-switch-project . auto-virtualenv-set-virtualenv))
 #+END_SRC
 
 ** Anaconda mode
 
 #+BEGIN_SRC emacs-lisp
 (use-package anaconda-mode
-  :config
-  (add-hook 'python-mode-hook 'anaconda-mode)
-  (add-hook 'python-mode-hook 'anaconda-eldoc-mode))
+  :hook
+  (python-mode . anaconda-mode)
+  (python-mode . anaconda-eldoc-mode))
 #+END_SRC
 
 ** PipEnv
@@ -2410,7 +2409,8 @@ Because it’s great.
 
 #+BEGIN_SRC emacs-lisp
 (use-package pipenv
-  :hook (python-mode . pipenv-mode)
+  :hook
+  (python-mode . pipenv-mode)
   :init
   (setq pipenv-projectile-after-switch-function #'pipenv-projectile-after-switch-extended))
 #+END_SRC
@@ -2496,8 +2496,9 @@ Because that’s still my favourite language.
 (use-package emmet-mode
   :config
   (setq emmet-self-closing-tag-style "")
-  (add-hook 'web-mode 'emmet-mode)
-  (add-hook 'css-mode 'emmet-mode))
+  :hook
+  (web-mode . emmet-mode)
+  (css-mode . emmet-mode))
 #+END_SRC
 
 ** Query HTML tags by CSS selectors
@@ -2619,8 +2620,9 @@ This is a big one; I use a lot of customisation here.
                '("g" "GT2 note" entry
                  (file+headline (lambda () (concat org-directory "gt2-notes.org")) "Captures")
                  "** %^{Title}\n   :PROPERTIES:\n   :on: %T\n   :END:\n   %i%?"))
-  (add-hook 'ediff-select-hook 'f-ediff-org-unfold-tree-element)
-  (add-hook 'ediff-unselect-hook 'f-ediff-org-fold-tree)
+  :hook
+  (ediff-select . f-ediff-org-unfold-tree-element)
+  (ediff-unselect . f-ediff-org-fold-tree)
   :bind
   (:map gpolonkai/pers-map
    ("a" . gpolonkai/org-agenda-list)
@@ -2790,8 +2792,7 @@ See previous versions of the current file.
   (--set-emoji-font nil)
   :config
   (add-to-list 'company-backends 'company-emoji)
-  (add-hook 'after-make-frame-functions
-            '--set-emoji-font))
+  (add-hook 'after-make-frame-functions '--set-emoji-font))
 #+END_SRC
 
 ** Anaconda backend for Company
@@ -2845,15 +2846,16 @@ See previous versions of the current file.
 ** GNU Globals with Helm
 
 #+BEGIN_SRC emacs-lisp
+(defun gpolonkai/enable-helm-gtags-mode ()
+  (helm-gtags-mode t))
+
 (use-package helm-gtags
   :init
   (setq-default helm-gtags-auto-update t
                 helm-gtags-ignore-case t
                 helm-gtags-path-style 'relative)
-  :config
-  (add-hook 'c-mode-hook
-            (lambda ()
-              (helm-gtags-mode t)))
+  :hook
+  (c-mode . gpolonkai/enable-helm-gtags-mode)
   :bind
   (:map helm-gtags-mode-map
    ("M-t" . helm-gtags-find-tag)