X-Git-Url: https://git.shemshak.org/~bandali/configs/blobdiff_plain/0cff213cc4dab6f5788957ec6dde2bc5894e02e0..b1c752b86267b05ef9560ef9481cda446f2ab077:/.emacs.d/init.el?ds=sidebyside

diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 6fbb842..fb4c73c 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -18,9 +18,8 @@
 ;;; Commentary:
 
 ;; Emacs configuration of Amin Bandali, computer scientist, functional
-;; programmer, and free software activist.  Used to use straight.el
-;; for purely functional and fully reproducible package management.
-;; Now I just use Guix.
+;; programmer, and free software activist.  Uses straight.el for
+;; purely functional and fully reproducible package management.
 
 ;; Over the years, I've taken inspiration from configurations of many
 ;; great people.  Some that I can remember off the top of my head are:
@@ -87,7 +86,81 @@
   nil)
 
 
-;;; use-package
+;;; Package management
+
+;; No package.el  (for emacs 26 and before, uncomment the following)
+;; Not necessary when using straight.el
+;;   (C-h v straight-package-neutering-mode RET)
+
+(when (and
+       (not (featurep 'straight))
+       (version< emacs-version "27"))
+  (setq package-enable-at-startup nil)
+  ;; (package-initialize)
+  )
+
+;; for emacs 27 and later, we use early-init.el.  see
+;; https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=24acb31c04b4048b85311d794e600ecd7ce60d3b
+
+;; straight.el
+
+;; Main engine start...
+
+(setq straight-repository-branch "develop"
+      straight-check-for-modifications '(check-on-save find-when-checking))
+
+(defun b/bootstrap-straight ()
+  (defvar bootstrap-version)
+  (let ((bootstrap-file
+         (expand-file-name "straight/repos/straight.el/bootstrap.el" user-emacs-directory))
+        (bootstrap-version 5))
+    (unless (file-exists-p bootstrap-file)
+      (with-current-buffer
+          (url-retrieve-synchronously
+           "https://raw.githubusercontent.com/raxod502/straight.el/develop/install.el"
+           'silent 'inhibit-cookies)
+        (goto-char (point-max))
+        (eval-print-last-sexp)))
+    (load bootstrap-file nil 'nomessage)))
+
+;; Solid rocket booster ignition...
+
+(b/bootstrap-straight)
+
+;; We have lift off!
+
+(setq straight-use-package-by-default t)
+
+(defmacro use-feature (name &rest args)
+  "Like `use-package', but with `straight-use-package-by-default' disabled."
+  (declare (indent 1))
+  `(use-package ,name
+     :straight nil
+     ,@args))
+
+(with-eval-after-load 'use-package-core
+  (let ((upflk (car use-package-font-lock-keywords)))
+    (font-lock-add-keywords
+     'emacs-lisp-mode
+     `((,(replace-regexp-in-string
+          "use-package" "use-feature"
+          (car upflk))
+        ,@(cdr upflk))))))
+
+(with-eval-after-load 'recentf
+  (add-to-list 'recentf-exclude
+               (expand-file-name "~/.emacs.d/straight/build/")))
+
+(defun b/reload-init ()
+  "Reload init.el."
+  (interactive)
+  (setq b/file-name-handler-alist file-name-handler-alist)
+  (load user-init-file nil 'nomessage)
+  (b/post-init))
+
+;; use-package
+(straight-use-package 'use-package)
+
 (if nil                             ; set to t when need to debug init
     (progn
       (setq use-package-verbose t
@@ -107,37 +180,26 @@
 ;;; Initial setup
 
 ;; keep ~/.emacs.d clean
-(defvar b/etc-dir
-  (expand-file-name
-   (convert-standard-filename "etc/") user-emacs-directory)
-  "The directory where packages place their configuration files.")
-
-(defvar b/var-dir
-  (expand-file-name
-   (convert-standard-filename "var/") user-emacs-directory)
-  "The directory where packages place their persistent data files.")
-
-(defun b/etc (file)
-  "Expand filename FILE relative to `b/etc-dir'."
-  (expand-file-name (convert-standard-filename file) b/etc-dir))
-
-(defun b/var (file)
-  "Expand filename FILE relative to `b/var-dir'."
-  (expand-file-name (convert-standard-filename file) b/var-dir))
-
-(setq
- auto-save-list-file-prefix (b/var "auto-save/sessions/")
- nsm-settings-file (b/var "nsm-settings.el"))
+(use-package no-littering
+  :demand
+  :config
+  (defalias 'b/etc 'no-littering-expand-etc-file-name)
+  (defalias 'b/var 'no-littering-expand-var-file-name))
 
 ;; separate custom file (don't want it mixing with init.el)
-(use-package custom
-  :no-require t
+(use-feature custom
+  :no-require
   :config
   (setq custom-file (b/etc "custom.el"))
   (when (file-exists-p custom-file)
     (load custom-file))
   ;; while at it, treat themes as safe
-  (setf custom-safe-themes t))
+  (setf custom-safe-themes t)
+  ;; only one custom theme at a time
+  (comment
+    (defadvice load-theme (before clear-previous-themes activate)
+      "Clear existing theme settings instead of layering them"
+      (mapc #'disable-theme custom-enabled-themes))))
 
 ;; load the secrets file if it exists, otherwise show a warning
 (comment
@@ -156,18 +218,86 @@
   (exec-path-from-shell-copy-env "SSH_AGENT_PID")
   (exec-path-from-shell-copy-env "SSH_AUTH_SOCK"))
 
-;; only one custom theme at a time
-(comment
-  (defadvice load-theme (before clear-previous-themes activate)
-    "Clear existing theme settings instead of layering them"
-    (mapc #'disable-theme custom-enabled-themes)))
-
 ;; start up emacs server.  see
 ;; https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html#Emacs-Server
-(use-package server
+(use-feature server
   :defer 0.4
   :config (or (server-running-p) (server-mode)))
 
+
+;;; Useful utilities
+
+;; useful libraries
+(require 'cl-lib)
+(require 'subr-x)
+
+(defmacro b/setq-every (value &rest vars)
+  "Set all the variables from VARS to value VALUE."
+  (declare (indent defun) (debug t))
+  `(progn ,@(mapcar (lambda (x) (list 'setq x value)) vars)))
+
+(defun b/start-process (program &rest args)
+  "Same as `start-process', but doesn't bother about name and buffer."
+  (let ((process-name (concat program "_process"))
+        (buffer-name  (generate-new-buffer-name
+                       (concat program "_output"))))
+    (apply #'start-process
+           process-name buffer-name program args)))
+
+(defun b/dired-start-process (program &optional args)
+  "Open current file with a PROGRAM."
+  ;; Shell command looks like this: "program [ARGS]... FILE" (ARGS can
+  ;; be nil, so remove it).
+  (apply #'b/start-process
+         program
+         (remove nil (list args (dired-get-file-for-visit)))))
+
+(defun b/add-elisp-section ()
+  (interactive)
+  (insert "\n")
+  (previous-line)
+  (insert "\n\n;;; "))
+
+(defun b/no-mouse-autoselect-window ()
+  "Conveniently disable `focus-follows-mouse'.
+For disabling the behaviour for certain buffers and/or modes."
+  (make-local-variable 'mouse-autoselect-window)
+  (setq mouse-autoselect-window nil))
+
+
+;;; Defaults
+
+;;;; C-level customizations
+
+(setq
+ ;; minibuffer
+ enable-recursive-minibuffers t
+ resize-mini-windows t
+ ;; more useful frame titles
+ frame-title-format '("" invocation-name " - "
+                      (:eval
+                       (if (buffer-file-name)
+                           (abbreviate-file-name (buffer-file-name))
+                         "%b")))
+ ;; i don't feel like jumping out of my chair every now and again; so
+ ;; don't BEEP! at me, emacs
+ ring-bell-function 'ignore
+ ;; better scrolling
+ ;; scroll-margin 1
+ ;; scroll-conservatively 10000
+ scroll-step 1
+ scroll-conservatively 10
+ scroll-preserve-screen-position 1
+ ;; focus follows mouse
+ mouse-autoselect-window t)
+
+(setq-default
+ ;; always use space for indentation
+ indent-tabs-mode nil
+ tab-width 4
+ ;; cursor shape
+ cursor-type 'bar)
+
 ;; unicode support
 (comment
   (dolist (ft (fontset-list))
@@ -201,175 +331,92 @@
      nil
      'prepend)))
 
-;; gentler font resizing
-(setq text-scale-mode-step 1.05)
-
-;; focus follows mouse
-(setq mouse-autoselect-window t)
-
-(defun b/no-mouse-autoselect-window ()
-  "Conveniently disable `focus-follows-mouse'.
-For disabling the behaviour for certain buffers and/or modes."
-  (make-local-variable 'mouse-autoselect-window)
-  (setq mouse-autoselect-window nil))
-
-;; better scrolling
-(setq ;; scroll-margin 1
-      ;; scroll-conservatively 10000
-      scroll-step 1
-      scroll-conservatively 10
-      scroll-preserve-screen-position 1)
+;;;; Elisp-level customizations
 
-(use-package mwheel
-  :defer 0.4
+(use-feature startup
+  :no-require
+  :demand
   :config
-  (setq mouse-wheel-scroll-amount '(1 ((shift) . 1)) ; one line at a time
-        mouse-wheel-progressive-speed nil            ; don't accelerate scrolling
-        mouse-wheel-follow-mouse t))                 ; scroll window under mouse
-
-(use-package pixel-scroll
-  :defer 0.4
-  :config (pixel-scroll-mode 1))
-
-;; ask for GPG passphrase in minibuffer
-(use-package epa
+  ;; don't need to see the startup echo area message
+  (advice-add #'display-startup-echo-area-message :override #'ignore)
   :custom
-  ; this will fail if gpg>=2.1 is not available
-  (epa-pinentry-mode 'loopback))
-
-(use-package epg-config
-  :defer 0.4
-  :custom
-  ((epg-gpg-program (executable-find "gpg"))
-   (epg-pinentry-mode 'loopback)))
-
-(use-package epg
-  :after epg-config)
-
-(use-package pinentry
+  ;; i want *scratch* as my startup buffer
+  (initial-buffer-choice t)
+  ;; i don't need the default hint
+  (initial-scratch-message nil)
+  ;; use customizable text-mode as major mode for *scratch*
+  (initial-major-mode 'text-mode)
+  ;; inhibit buffer list when more than 2 files are loaded
+  (inhibit-startup-buffer-menu t)
+  ;; don't need to see the startup screen or echo area message
+  (inhibit-startup-screen t)
+  (inhibit-startup-echo-area-message user-login-name))
+
+(use-feature files
+  :no-require
   :demand
-  :after (epa epg server)
-  :config
-  (setq pinentry--socket-dir server-socket-dir)
-  (pinentry-start))
+  :custom
+  ;; backups (C-h v make-backup-files RET)
+  (backup-by-copying t)
+  (version-control t)
+  (delete-old-versions t)
 
-;; useful libraries
-(require 'cl-lib)
-(require 'subr-x)
+  ;; auto-save
+  (auto-save-file-name-transforms
+   `((".*" ,(b/var "auto-save/") t)))
 
-
-;;; Useful utilities
+  ;; insert newline at the end of files
+  (require-final-newline t)
 
-(defmacro b/setq-every (value &rest vars)
-  "Set all the variables from VARS to value VALUE."
-  (declare (indent defun) (debug t))
-  `(progn ,@(mapcar (lambda (x) (list 'setq x value)) vars)))
+  ;; open read-only file buffers in view-mode
+  ;; (enables niceties like `q' for quit)
+  (view-read-only t))
 
-(defun b/start-process (program &rest args)
-  "Same as `start-process', but doesn't bother about name and buffer."
-  (let ((process-name (concat program "_process"))
-        (buffer-name  (generate-new-buffer-name
-                       (concat program "_output"))))
-    (apply #'start-process
-           process-name buffer-name program args)))
-
-(defun b/dired-start-process (program &optional args)
-  "Open current file with a PROGRAM."
-  ;; Shell command looks like this: "program [ARGS]... FILE" (ARGS can
-  ;; be nil, so remove it).
-  (apply #'b/start-process
-         program
-         (remove nil (list args (dired-get-file-for-visit)))))
+;; disable disabled commands
+(setq disabled-command-function nil)
 
-(defun b/add-elisp-section ()
-  (interactive)
-  (insert "\n")
-  (previous-line)
-  (insert "\n\n;;; "))
+;; lazy-person-friendly yes/no prompts
+(defalias 'yes-or-no-p #'y-or-n-p)
 
-
-;;; Defaults
+;; enable automatic reloading of changed buffers and files
+(use-feature autorevert
+  :demand
+  :config
+  (global-auto-revert-mode 1)
+  :custom
+  (auto-revert-verbose nil)
+  (global-auto-revert-non-file-buffers nil))
 
 ;; time and battery in mode-line
 (comment
-  (use-package time
+  (use-feature time
     :init
     (setq display-time-default-load-average nil)
     :config
     (display-time-mode))
 
-  (use-package battery
+  (use-feature battery
     :config
     (display-battery-mode)))
 
-;; smaller fringe
-;; (fringe-mode '(3 . 1))
-(fringe-mode nil)
-
-;; disable disabled commands
-(setq disabled-command-function nil)
-
-;; Save what I copy into clipboard from other applications into Emacs'
-;; kill-ring, which would allow me to still be able to easily access
-;; it in case I kill (cut or copy) something else inside Emacs before
-;; yanking (pasting) what I'd originally intended to.
-(setq save-interprogram-paste-before-kill t)
-
-;; minibuffer
-(setq enable-recursive-minibuffers t
-      resize-mini-windows t)
-
-;; lazy-person-friendly yes/no prompts
-(defalias 'yes-or-no-p #'y-or-n-p)
-
-;; i want *scratch* as my startup buffer
-(setq initial-buffer-choice t)
-
-;; i don't need the default hint
-(setq initial-scratch-message nil)
-
-;; use customizable text-mode as major mode for *scratch*
-(setq initial-major-mode 'text-mode)
-
-;; inhibit buffer list when more than 2 files are loaded
-(setq inhibit-startup-buffer-menu t)
-
-;; don't need to see the startup screen or the echo area message
-(advice-add #'display-startup-echo-area-message :override #'ignore)
-(setq inhibit-startup-screen t
-      inhibit-startup-echo-area-message user-login-name)
-
-;; more useful frame titles
-(setq frame-title-format
-      '("" invocation-name " - "
-        (:eval (if (buffer-file-name)
-                   (abbreviate-file-name (buffer-file-name))
-                 "%b"))))
-
-;; backups (C-h v make-backup-files RET)
-(setq backup-by-copying t
-      backup-directory-alist (list (cons "." (b/var "backup/")))
-      version-control t
-      delete-old-versions t)
-
-;; enable automatic reloading of changed buffers and files
-(global-auto-revert-mode 1)
-(setq auto-revert-verbose nil
-      global-auto-revert-non-file-buffers nil)
-
-;; always use space for indentation
-(setq-default
- indent-tabs-mode nil
- require-final-newline t
- tab-width 4)
+(use-feature fringe
+  :demand
+  :config
+  ;; smaller fringe
+  ;; (fringe-mode '(3 . 1))
+  (fringe-mode nil))
 
-;; enable winner-mode (C-h f winner-mode RET)
-(winner-mode 1)
+(use-feature winner
+  :demand
+  :config
+  ;; enable winner-mode (C-h f winner-mode RET)
+  (winner-mode 1))
 
-;; don't display *compilation* buffer on success.  based on
-;; https://stackoverflow.com/a/17788551, with changes to use `cl-letf'
-;; instead of the now obsolete `flet'.
-(with-eval-after-load 'compile
+(use-feature compile
+  :config
+  ;; don't display *compilation* buffer on success.  based on
+  ;; https://stackoverflow.com/a/17788551, with changes to use `cl-letf'
+  ;; instead of the now obsolete `flet'.
   (defun b/compilation-finish-function (buffer outstr)
     (unless (string-match "finished" outstr)
       (switch-to-buffer-other-window buffer))
@@ -388,35 +435,49 @@ For disabling the behaviour for certain buffers and/or modes."
       ad-do-it))
   (ad-activate 'compilation-start))
 
-;; search for non-ASCII characters: i’d like non-ASCII characters such
-;; as ‘’“”«»‹›áⓐ𝒶 to be selected when i search for their ASCII
-;; counterpart.  shoutout to
-;; http://endlessparentheses.com/new-in-emacs-25-1-easily-search-non-ascii-characters.html
-(setq search-default-mode #'char-fold-to-regexp)
-;; uncomment to extend this behaviour to query-replace
-;; (setq replace-char-fold t)
-
-;; cursor shape
-(setq-default cursor-type 'bar)
-
-;; allow scrolling in Isearch
-(setq isearch-allow-scroll t)
-
-;; open read-only file buffers in view-mode
-;; (enables niceties like `q' for quit)
-(setq view-read-only t)
+(use-feature isearch
+  :custom
+  ;; allow scrolling in Isearch
+  (isearch-allow-scroll t)
+  ;; search for non-ASCII characters: i’d like non-ASCII characters such
+  ;; as ‘’“”«»‹›áⓐ𝒶 to be selected when i search for their ASCII
+  ;; counterpart.  shoutout to
+  ;; http://endlessparentheses.com/new-in-emacs-25-1-easily-search-non-ascii-characters.html
+  (search-default-mode #'char-fold-to-regexp))
+
+;; uncomment to extend the above behaviour to query-replace
+(comment
+  (use-feature replace
+    :custom
+    (replace-char-fold t)))
 
-(use-package vc
+(use-feature vc
   :bind ("C-x v C-=" . vc-ediff))
 
-(use-package ediff
+(use-feature ediff
   :config (add-hook 'ediff-after-quit-hook-internal 'winner-undo)
   :custom ((ediff-window-setup-function 'ediff-setup-windows-plain)
            (ediff-split-window-function 'split-window-horizontally)))
 
-;; i don't feel like jumping out of my chair every now and again; so
-;; don't BEEP! at me, emacs
-(setq ring-bell-function 'ignore)
+(use-feature face-remap
+  :custom
+  ;; gentler font resizing
+  (text-scale-mode-step 1.05))
+
+(use-feature mwheel
+  :defer 0.4
+  :config
+  (setq mouse-wheel-scroll-amount '(1 ((shift) . 1)) ; one line at a time
+        mouse-wheel-progressive-speed nil            ; don't accelerate scrolling
+        mouse-wheel-follow-mouse t))                 ; scroll window under mouse
+
+(use-feature pixel-scroll
+  :defer 0.4
+  :config (pixel-scroll-mode 1))
+
+(use-feature epg-config
+  :custom
+  ((epg-gpg-program (executable-find "gpg"))))
 
 
 ;;; General bindings
@@ -425,6 +486,7 @@ For disabling the behaviour for certain buffers and/or modes."
  ("C-c a i" . ielm)
 
  ("C-c e b" . eval-buffer)
+ ("C-c e e" . eval-last-sexp)
  ("C-c e r" . eval-region)
 
  ("C-c e i" . emacs-init-time)
@@ -440,6 +502,8 @@ For disabling the behaviour for certain buffers and/or modes."
 
  ("C-x k"   . kill-this-buffer)
  ("C-x K"   . kill-buffer)
+ ("C-x s"   . save-buffer)
+ ("C-x S"   . save-some-buffers)
 
  :map emacs-lisp-mode-map
  ("<C-return>" . b/add-elisp-section))
@@ -449,17 +513,48 @@ For disabling the behaviour for certain buffers and/or modes."
 
 (bind-keys
  ;; for back and forward mouse keys
+ ("<XF86Back>"     . previous-buffer)
  ("<mouse-8>"      . previous-buffer)
  ("<drag-mouse-8>" . previous-buffer)
+ ("<XF86Forward>"  . next-buffer)
  ("<mouse-9>"      . next-buffer)
  ("<drag-mouse-9>" . next-buffer)
  ("<drag-mouse-2>" . kill-this-buffer)
  ("<drag-mouse-3>" . ivy-switch-buffer))
 
+(bind-keys
+ :prefix-map b/straight-prefix-map
+ :prefix "C-c p s"
+ ("u" . straight-use-package)
+ ("f" . straight-freeze-versions)
+ ("t" . straight-thaw-versions)
+ ("P" . straight-prune-build)
+ ("g" . straight-get-recipe)
+ ("r" . b/reload-init)
+ ;; M-x ^straight-.*-all$
+ ("a c" . straight-check-all)
+ ("a f" . straight-fetch-all)
+ ("a m" . straight-merge-all)
+ ("a n" . straight-normalize-all)
+ ("a F" . straight-pull-all)
+ ("a P" . straight-push-all)
+ ("a r" . straight-rebuild-all)
+ ;; M-x ^straight-.*-package$
+ ("p c" . straight-check-package)
+ ("p f" . straight-fetch-package)
+ ("p m" . straight-merge-package)
+ ("p n" . straight-normalize-package)
+ ("p F" . straight-pull-package)
+ ("p P" . straight-push-package)
+ ("p r" . straight-rebuild-package))
+
 
 ;;; Essential packages
 
-(use-package org
+;; use the org-plus-contrib package to get the whole deal
+(use-package org-plus-contrib)
+
+(use-feature org
   :defer 0.5
   :config
   (setq org-src-tab-acts-natively t
@@ -471,14 +566,16 @@ For disabling the behaviour for certain buffers and/or modes."
         org-startup-folded 'content
         org-catch-invisible-edits 'show-and-error
         org-log-done 'time)
+  (when (version< org-version "9.3")
+    (setq org-email-link-description-format
+          org-link-email-description-format))
   (add-to-list 'org-structure-template-alist '("L" . "src emacs-lisp") t)
   (add-to-list 'org-modules 'org-habit)
   :bind
   (("C-c a o a" . org-agenda)
    :map org-mode-map
    ("M-L" . org-insert-last-stored-link)
-   ("M-O" . org-toggle-link-display)
-   ("s-T" . org-todo))
+   ("M-O" . org-toggle-link-display))
   :hook ((org-mode . org-indent-mode)
          (org-mode . auto-fill-mode)
          (org-mode . flyspell-mode))
@@ -496,7 +593,7 @@ For disabling the behaviour for certain buffers and/or modes."
   '(org-block ((t (:background "#1d1f21"))))
   '(org-latex-and-related ((t (:foreground "#b294bb")))))
 
-(use-package ox-latex
+(use-feature ox-latex
   :after ox
   :config
   (setq org-latex-listings 'listings
@@ -512,7 +609,7 @@ For disabling the behaviour for certain buffers and/or modes."
                t)
   (require 'ox-beamer))
 
-(use-package ox-extra
+(use-feature ox-extra
   :config
   (ox-extras-activate '(latex-header-blocks ignore-headlines)))
 
@@ -557,38 +654,37 @@ For disabling the behaviour for certain buffers and/or modes."
 ;; *the* right way to do git
 (use-package magit
   :defer 0.5
-  :bind (("C-x g" . magit-status)
-         ("s-g s" . magit-status)
-         ("s-g l" . magit-log-buffer-file))
+  :bind (("C-x g"   . magit-status)
+         ("C-c g g" . magit-status)
+         ("C-c g b" . magit-blame-addition)
+         ("C-c g l" . magit-log-buffer-file))
   :config
   (magit-add-section-hook 'magit-status-sections-hook
                           'magit-insert-modules
                           'magit-insert-stashes
                           'append)
+  ;; (magit-add-section-hook 'magit-status-sections-hook
+  ;;                         'magit-insert-ignored-files
+  ;;                         'magit-insert-untracked-files
+  ;;                         'append)
   (setq magit-repository-directories '(("~/" . 0)
                                        ("~/src/git/" . 1)))
   (nconc magit-section-initial-visibility-alist
          '(([unpulled status] . show)
            ([unpushed status] . show)))
-  (setq transient-history-file (b/var "transient/history.el")
-        transient-levels-file  (b/etc "transient/levels.el")
-        transient-values-file  (b/etc "transient/values.el"))
   :custom (magit-display-buffer-function #'magit-display-buffer-fullframe-status-v1)
   :custom-face (magit-diff-file-heading ((t (:weight normal)))))
 
 ;; recently opened files
-(use-package recentf
+(use-feature recentf
   :defer 0.2
   ;; :config
   ;; (add-to-list 'recentf-exclude "^/\\(?:ssh\\|su\\|sudo\\)?:")
   :custom
-  (recentf-max-saved-items 2000)
-  (recentf-save-file (b/var "recentf-save.el")))
+  (recentf-max-saved-items 2000))
 
 ;; smart M-x enhancement (needed by counsel for history)
-(use-package smex
-  :config
-  (setq smex-save-file (b/var "smex-save.el")))
+(use-package smex)
 
 (use-package ivy
   :defer 0.3
@@ -605,6 +701,19 @@ For disabling the behaviour for certain buffers and/or modes."
         ivy-use-virtual-buffers t
         ivy-virtual-abbreviate 'abbreviate
         ivy-count-format "%d/%d ")
+
+  (defvar b/ivy-ignore-buffer-modes '(magit-mode erc-mode dired-mode))
+  (defun b/ivy-ignore-buffer-p (str)
+    "Return non-nil if str names a buffer with a major mode
+derived from one of `b/ivy-ignore-buffer-modes'.
+
+This function is intended for use with `ivy-ignore-buffers'."
+    (let* ((buf (get-buffer str))
+           (mode (and buf (buffer-local-value 'major-mode buf))))
+      (and mode
+           (apply #'provided-mode-derived-p mode b/ivy-ignore-buffer-modes))))
+  (add-to-list 'ivy-ignore-buffers 'b/ivy-ignore-buffer-p)
+
   (ivy-mode 1)
   ;; :custom-face
   ;; (ivy-minibuffer-match-face-2 ((t (:background "#e99ce8" :weight semi-bold))))
@@ -623,12 +732,11 @@ For disabling the behaviour for certain buffers and/or modes."
   :delight
   :bind (([remap execute-extended-command] . counsel-M-x)
          ([remap find-file]                . counsel-find-file)
-         ("C-c x"                          . counsel-M-x)
+         ("C-c b b"                        . ivy-switch-buffer)
          ("C-c f ."                        . counsel-find-file)
          ("C-c f l"                        . counsel-find-library)
          ("C-c f r"                        . counsel-recentf)
-         ("s-."                            . counsel-find-file)
-         ("s-r"                            . ivy-switch-buffer)
+         ("C-c x"                          . counsel-M-x)
          :map minibuffer-local-map
          ("C-r" . counsel-minibuffer-history))
   :config
@@ -644,7 +752,6 @@ For disabling the behaviour for certain buffers and/or modes."
            ("C-x C-b" . helm-buffers-list)
            ("C-x C-f" . helm-find-files)
            ("C-h r"   . helm-info-emacs)
-           ("s-r"     . helm-recentf)
            ("C-s-r"   . helm-resume)
            :map helm-map
            ("<tab>" . helm-execute-persistent-action)
@@ -652,7 +759,7 @@ For disabling the behaviour for certain buffers and/or modes."
            ("C-z"   . helm-select-action))            ; List actions
     :config (helm-mode 1)))
 
-(use-package eshell
+(use-feature eshell
   :defer 0.5
   :commands eshell
   :bind ("C-c a s e" . eshell)
@@ -682,11 +789,10 @@ For disabling the behaviour for certain buffers and/or modes."
 
   :hook (eshell-mode . b/eshell-setup)
   :custom
-  (eshell-directory-name (b/var "eshell/"))
   (eshell-hist-ignoredups t)
   (eshell-input-filter 'eshell-input-filter-initial-space))
 
-(use-package ibuffer
+(use-feature ibuffer
   :bind
   (("C-x C-b" . ibuffer)
    :map ibuffer-mode-map
@@ -760,7 +866,8 @@ For disabling the behaviour for certain buffers and/or modes."
            " " filename)))
   :hook (ibuffer . (lambda () (ibuffer-switch-to-saved-filter-groups "default"))))
 
-(use-package outline
+(use-feature outline
+  :disabled
   :hook (prog-mode . outline-minor-mode)
   :delight (outline-minor-mode " outl")
   :bind
@@ -778,10 +885,10 @@ For disabling the behaviour for certain buffers and/or modes."
    ("h"   . outline-hide-subtree)
    ("s"   . outline-show-subtree)))
 
-(use-package ls-lisp
+(use-feature ls-lisp
   :custom (ls-lisp-dirs-first t))
 
-(use-package dired
+(use-feature dired
   :config
   (setq dired-listing-switches "-alh"
         ls-lisp-use-insert-directory-program nil)
@@ -830,12 +937,12 @@ For disabling the behaviour for certain buffers and/or modes."
                         (b/dired-start-process "zathura"))))
   :hook (dired-mode . dired-hide-details-mode))
 
-(use-package help
+(use-feature help
   :config
   (temp-buffer-resize-mode)
   (setq help-window-select t))
 
-(use-package tramp
+(use-feature tramp
   :config
   (add-to-list 'tramp-default-proxies-alist '(nil "\\`root\\'" "/ssh:%h:"))
   (add-to-list 'tramp-default-proxies-alist '("localhost" nil nil))
@@ -845,7 +952,7 @@ For disabling the behaviour for certain buffers and/or modes."
 (use-package dash
   :config (dash-enable-font-lock))
 
-(use-package doc-view
+(use-feature doc-view
   :bind (:map doc-view-mode-map
               ("M-RET" . image-previous-line)))
 
@@ -861,51 +968,55 @@ For disabling the behaviour for certain buffers and/or modes."
   :hook (magit-post-refresh . diff-hl-magit-post-refresh))
 
 ;; display Lisp objects at point in the echo area
-(use-package eldoc
+(use-feature eldoc
   :when (version< "25" emacs-version)
   :delight " eldoc"
   :config (global-eldoc-mode))
 
 ;; highlight matching parens
-(use-package paren
+(use-feature paren
   :demand
   :config (show-paren-mode))
 
-(use-package elec-pair
+(use-feature elec-pair
   :demand
   :config (electric-pair-mode))
 
-(use-package simple
+(use-feature simple
   :delight (auto-fill-function " fill")
-  :config (column-number-mode))
+  :config (column-number-mode)
+  :custom
+  ;; Save what I copy into clipboard from other applications into Emacs'
+  ;; kill-ring, which would allow me to still be able to easily access
+  ;; it in case I kill (cut or copy) something else inside Emacs before
+  ;; yanking (pasting) what I'd originally intended to.
+  (save-interprogram-paste-before-kill t))
 
 ;; save minibuffer history
-(use-package savehist
+(use-feature savehist
+  :demand
   :config
   (savehist-mode)
-  :custom
-  (savehist-file (b/var "savehist.el")))
+  (add-to-list 'savehist-additional-variables 'kill-ring))
 
 ;; automatically save place in files
-(use-package saveplace
+(use-feature saveplace
   :when (version< "25" emacs-version)
-  :config (save-place-mode)
-  :custom
-  (save-place-file (b/var "save-place.el")))
+  :config (save-place-mode))
 
-(use-package prog-mode
+(use-feature prog-mode
   :config (global-prettify-symbols-mode)
   (defun indicate-buffer-boundaries-left ()
     (setq indicate-buffer-boundaries 'left))
   (add-hook 'prog-mode-hook #'indicate-buffer-boundaries-left))
 
-(use-package text-mode
+(use-feature text-mode
   :hook (text-mode . indicate-buffer-boundaries-left))
 
-(use-package conf-mode
+(use-feature conf-mode
   :mode "\\.*rc$")
 
-(use-package sh-mode
+(use-feature sh-mode
   :mode "\\.bashrc$")
 
 (use-package company
@@ -939,11 +1050,11 @@ For disabling the behaviour for certain buffers and/or modes."
   (setq flycheck-check-syntax-automatically '(mode-enabled save))
   :custom (flycheck-mode-line-prefix "flyc"))
 
-(use-package flyspell
+(use-feature flyspell
   :delight " flysp")
 
 ;; http://endlessparentheses.com/ispell-and-apostrophes.html
-(use-package ispell
+(use-feature ispell
   :defer 0.6
   :config
   ;; ’ can be part of a word
@@ -969,52 +1080,52 @@ For disabling the behaviour for certain buffers and/or modes."
   (advice-add #'ispell-parse-output :filter-args
               #'endless/replace-quote))
 
-(use-package abbrev
+(use-feature abbrev
   :delight " abbr"
-  :hook (text-mode . abbrev-mode)
-  :custom
-  (abbrev-file-name (b/var "abbrev.el")))
+  :hook (text-mode . abbrev-mode))
 
 
 ;;; Programming modes
 
-(use-package lisp-mode
+(use-feature lisp-mode
   :config
   (defun indent-spaces-mode ()
     (setq indent-tabs-mode nil))
   (add-hook 'lisp-interaction-mode-hook #'indent-spaces-mode))
 
-(use-package reveal
+(use-feature reveal
   :delight (reveal-mode " reveal")
   :hook (emacs-lisp-mode . reveal-mode))
 
-(use-package elisp-mode
+(use-feature elisp-mode
   :delight (emacs-lisp-mode "Elisp" :major))
 
-(comment
-  ;; TODO
-  (use-package alloy-mode
-    :straight (:host github :repo "dwwmmn/alloy-mode")
-    :mode "\\.als\\'"
-    :config (setq alloy-basic-offset 2))
 
+(use-package alloy-mode
+  :straight (:host github :repo "dwwmmn/alloy-mode")
+  :mode "\\.als\\'"
+  :config (setq alloy-basic-offset 2))
+
+(eval-when-compile (defvar lean-mode-map))
+(use-package lean-mode
+  :straight (:host github :repo "leanprover/lean-mode"
+                   :fork (:repo "notbandali/lean-mode" :branch "remove-cl"))
+  :defer 0.4
+  :bind (:map lean-mode-map
+              ("S-SPC" . company-complete))
+  :config
+  (require 'lean-input)
+  (setq default-input-method "Lean"
+        lean-input-tweak-all '(lean-input-compose
+                               (lean-input-prepend "/")
+                               (lean-input-nonempty))
+        lean-input-user-translations '(("/" "/")))
+  (lean-input-setup))
+
+(comment
   (use-package proof-site                 ; for Coq
     :straight proof-general)
 
-  (eval-when-compile (defvar lean-mode-map))
-  (use-package lean-mode
-    :defer 0.4
-    :bind (:map lean-mode-map
-                ("S-SPC" . company-complete))
-    :config
-    (require 'lean-input)
-    (setq default-input-method "Lean"
-          lean-input-tweak-all '(lean-input-compose
-                                 (lean-input-prepend "/")
-                                 (lean-input-nonempty))
-          lean-input-user-translations '(("/" "/")))
-    (lean-input-setup))
-
   (use-package haskell-mode
     :config
     (setq haskell-indentation-layout-offset 4
@@ -1039,11 +1150,11 @@ For disabling the behaviour for certain buffers and/or modes."
   ;; alternative: hs-lint https://github.com/ndmitchell/hlint/blob/20e116a043f2073c57b17b24ae6364b5e433ba7e/data/hs-lint.el
   )
 
-(use-package sgml-mode
+(use-feature sgml-mode
   :config
   (setq sgml-basic-offset 2))
 
-(use-package css-mode
+(use-feature css-mode
   :config
   (setq css-indent-offset 2))
 
@@ -1136,12 +1247,9 @@ For disabling the behaviour for certain buffers and/or modes."
     (eclim-executable "~/.p2/pool/plugins/org.eclim_2.8.0/bin/eclim")
     (eclim-eclipse-dirs '("~/usr/eclipse/dsl-2018-09/eclipse"))))
 
-(use-package geiser
-  :config
-  (make-directory (b/var "geiser/") t)
-  (setq geiser-repl-history-filename (b/var "geiser/repl-history")))
+(use-package geiser)
 
-(use-package geiser-guile
+(use-feature geiser-guile
   :config
   (setq geiser-guile-load-path "~/src/git/guix"))
 
@@ -1158,11 +1266,14 @@ For disabling the behaviour for certain buffers and/or modes."
   :hook
   (po-mode . (lambda () (run-with-timer 0.1 nil 'View-exit))))
 
-(use-package tex-mode
+(use-feature tex-mode
   :config
   (cl-delete-if
    (lambda (p) (string-match "^---?" (car p)))
-   tex--prettify-symbols-alist))
+   tex--prettify-symbols-alist)
+  :hook ((tex-mode . auto-fill-mode)
+         (tex-mode . flyspell-mode)
+         (tex-mode . (lambda () (electric-indent-local-mode -1)))))
 
 
 ;;; Theme
@@ -1179,9 +1290,7 @@ For disabling the behaviour for certain buffers and/or modes."
   (sml/setup)
   (smart-mode-line-enable))
 
-(comment
-  ;; TODO
-  (use-package doom-themes))
+(use-package doom-themes)
 
 (defvar b/org-mode-font-lock-keywords
   '(("[ \t]*\\(#\\+\\(BEGIN\\|END\\|begin\\|end\\)_\\(\\S-+\\)\\)[ \t]*\\([^\n:]*\\)"
@@ -1202,14 +1311,14 @@ For disabling the behaviour for certain buffers and/or modes."
   "Go dark."
   (interactive)
   (mapc #'disable-theme custom-enabled-themes)
-  ;; (load-theme 'doom-tomorrow-night t)
+  (load-theme 'doom-tomorrow-night t)
   (sml/apply-theme 'automatic)
   (font-lock-add-keywords
    'org-mode b/org-mode-font-lock-keywords t))
 
 (bind-keys
- ("s-t d" . b/lights-off)
- ("s-t l" . b/lights-on))
+ ("C-c t d" . b/lights-off)
+ ("C-c t l" . b/lights-on))
 
 
 ;;; Emacs enhancements & auxiliary packages
@@ -1238,15 +1347,12 @@ For disabling the behaviour for certain buffers and/or modes."
     "C-c a e" "erc"
     "C-c a o" "org"
     "C-c a s" "shells"
-    "C-c p"   "package-management"
-    ;; "C-c p e" "package-management/epkg"
-    "C-c p s" "straight.el"
-    "C-c psa" "all"
-    "C-c psp" "package"
+    "C-c b"   "buffers"
     "C-c c"   "compile-and-comments"
     "C-c e"   "eval"
     "C-c f"   "files"
     "C-c F"   "frames"
+    "C-c g"   "magit"
     "C-S-h"   "help(ful)"
     "C-c m"   "multiple-cursors"
     "C-c P"   "projectile"
@@ -1254,13 +1360,13 @@ For disabling the behaviour for certain buffers and/or modes."
     "C-c P x" "projectile/execute"
     "C-c P 4" "projectile/other-window"
     "C-c q"   "boxquote"
-    "s-g"     "magit"
-    "s-O"     "outline"
-    "s-t"     "themes")
+    "C-c t"   "themes"
+    ;; "s-O"     "outline"
+    )
 
   ;; prefixes for major modes
   (which-key-add-major-mode-key-based-replacements 'message-mode
-    "C-c f"   "footnote")
+    "C-c f n" "footnote")
   (which-key-add-major-mode-key-based-replacements 'org-mode
     "C-c C-v" "org-babel")
   (which-key-add-major-mode-key-based-replacements 'web-mode
@@ -1277,8 +1383,7 @@ For disabling the behaviour for certain buffers and/or modes."
 
 (use-package crux            ; results in Waiting for git... [2 times]
   :defer 0.4
-  :bind (("C-c b k" . crux-kill-other-buffers)
-         ("C-c d"   . crux-duplicate-current-line-or-region)
+  :bind (("C-c d"   . crux-duplicate-current-line-or-region)
          ("C-c D"   . crux-duplicate-and-comment-current-line-or-region)
          ("C-c f c" . crux-copy-file-preserve-attributes)
          ("C-c f d" . crux-delete-file-and-buffer)
@@ -1296,7 +1401,6 @@ For disabling the behaviour for certain buffers and/or modes."
   :defer 0.5
   :bind-keymap ("C-c P" . projectile-command-map)
   :config
-  (make-directory (b/var "projectile/") t)
   (projectile-mode)
 
   (defun b/projectile-mode-line-fun ()
@@ -1321,9 +1425,7 @@ For disabling the behaviour for certain buffers and/or modes."
        (advice-add 'magit-branch-and-checkout
                    :after #'my-projectile-invalidate-cache)))
   :custom
-  (projectile-cache-file (b/var "projectile/cache.el"))
   (projectile-completion-system 'ivy)
-  (projectile-known-projects-file (b/var "projectile/known-projects.el"))
   (projectile-mode-line-prefix " proj"))
 
 (use-package helpful
@@ -1383,7 +1485,8 @@ For disabling the behaviour for certain buffers and/or modes."
   :delight " typo"
   :config
   (typo-global-mode 1)
-  :hook ((text-mode erc-mode) . typo-mode))
+  :hook (((text-mode erc-mode) . typo-mode)
+         (tex-mode             . (lambda ()(typo-mode -1)))))
 
 ;; highlight TODOs in buffers
 (use-package hl-todo
@@ -1482,9 +1585,7 @@ For disabling the behaviour for certain buffers and/or modes."
                ("c" . mc/edit-lines)
                ("n" . mc/mark-next-like-this)
                ("p" . mc/mark-previous-like-this)
-               ("a" . mc/mark-all-like-this)))
-  :config
-  (setq mc/list-file (b/var "mc-list.el")))
+               ("a" . mc/mark-all-like-this))))
 
 (comment
   ;; TODO
@@ -1497,13 +1598,26 @@ For disabling the behaviour for certain buffers and/or modes."
   :config
   (defconst yas-verbosity-cur yas-verbosity)
   (setq yas-verbosity 2)
-  (setq yas-snippet-dirs (list (b/etc "yasnippet/snippets/")))
   (add-to-list 'yas-snippet-dirs "~/src/git/guix/etc/snippets" t)
   (yas-reload-all)
   (setq yas-verbosity yas-verbosity-cur)
+
+  (defun b/yas--maybe-expand-key-filter (cmd)
+    (when (and (yas--maybe-expand-key-filter cmd)
+               (not (bound-and-true-p git-commit-mode)))
+      cmd))
+  (defconst b/yas-maybe-expand
+    '(menu-item "" yas-expand :filter b/yas--maybe-expand-key-filter))
+  (define-key yas-minor-mode-map
+    (kbd "SPC") b/yas-maybe-expand)
+
   (yas-global-mode))
 
-(use-package debbugs)
+(use-package debbugs
+  :straight (debbugs
+             :host github
+             :repo "emacs-straight/debbugs"
+             :files (:defaults "Debbugs.wsdl")))
 
 (use-package org-ref
   :init
@@ -1521,32 +1635,29 @@ For disabling the behaviour for certain buffers and/or modes."
 ;; (use-package fill-column-indicator)
 
 (use-package emojify
-  :config
-  (make-directory (b/var "emojify/") t)
-  (setq emojify-emojis-dir (b/var "emojify/"))
   :hook (erc-mode . emojify-mode))
 
-(use-package window
+(use-feature window
   :bind
-  (("s-o"   . other-window)
-   ("s-/ ." . split-window-right)
-   ("s-/ ," . split-window-below)
-   ("s-/ 0" . delete-window)
-   ("s-q"   . delete-window))
+  (("C-c w <right>" . split-window-right)
+   ("C-c w <down>"  . split-window-below)
+   ("C-c w s l"     . split-window-right)
+   ("C-c w s j"     . split-window-below)
+   ("C-c w q"       . quit-window))
   :custom
   (split-width-threshold 150))
 
-(use-package windmove
+(use-feature windmove
   :defer 0.6
   :bind
-  (("s-h" . windmove-left)
-   ("s-j" . windmove-down)
-   ("s-k" . windmove-up)
-   ("s-l" . windmove-right)
-   ("s-H" . windmove-swap-states-left)
-   ("s-J" . windmove-swap-states-down)
-   ("s-K" . windmove-swap-states-up)
-   ("s-L" . windmove-swap-states-right)))
+  (("C-c w h" . windmove-left)
+   ("C-c w j" . windmove-down)
+   ("C-c w k" . windmove-up)
+   ("C-c w l" . windmove-right)
+   ("C-c w H" . windmove-swap-states-left)
+   ("C-c w J" . windmove-swap-states-down)
+   ("C-c w K" . windmove-swap-states-up)
+   ("C-c w L" . windmove-swap-states-right)))
 
 (use-package pass
   :commands pass
@@ -1556,11 +1667,35 @@ For disabling the behaviour for certain buffers and/or modes."
 (use-package pdf-tools
   :defer 0.5
   :bind (:map pdf-view-mode-map
-              ("M-RET" . image-previous-line))
-  :config (pdf-tools-install nil t))
+              ("<C-XF86Back>"    . pdf-history-backward)
+              ("<mouse-8>"       . pdf-history-backward)
+              ("<drag-mouse-8>"  . pdf-history-backward)
+              ("<C-XF86Forward>" . pdf-history-forward)
+              ("<mouse-9>"       . pdf-history-forward)
+              ("<drag-mouse-9>"  . pdf-history-forward)
+              ("M-RET"           . image-previous-line))
+  :config (pdf-tools-install nil t)
+  :custom (pdf-view-resize-factor 1.05))
 
 (use-package biblio)
 
+(use-feature reftex
+  :hook (latex-mode . reftex-mode))
+
+(use-feature reftex-cite
+  :after reftex
+  :disabled                             ; enable to disable
+                                        ; reftex-cite's default choice
+                                        ; of previous word
+  :config
+  (defun reftex-get-bibkey-default ()
+    "If the cursor is in a citation macro, return the word before the macro."
+    (let* ((macro (reftex-what-macro 1)))
+      (save-excursion
+        (when (and macro (string-match "cite" (car macro)))
+          (goto-char (cdr macro)))
+        (reftex-this-word)))))
+
 
 ;;; Email (with Gnus)
 
@@ -1573,9 +1708,11 @@ For disabling the behaviour for certain buffers and/or modes."
  mail-user-agent   'gnus-user-agent
  read-mail-command 'gnus)
 
-(use-package gnus
-  :bind (("s-m"   . gnus)
-         ("s-M"   . gnus-unplugged))
+(use-feature gnus
+  :bind (("s-m"     . gnus)
+         ("s-M"     . gnus-unplugged)
+         ("C-c a m" . gnus)
+         ("C-c a M" . gnus-unplugged))
   :init
   (setq
    gnus-select-method '(nnnil "")
@@ -1598,19 +1735,23 @@ For disabling the behaviour for certain buffers and/or modes."
                                  ;; (: gnus-registry-split-fancy-with-parent)
                                  ;; (: gnus-group-split-fancy "INBOX" t "INBOX")
                                  ;; gnu
-                                 (list "\\(.*\\).gnu.org" "l.\\1")
+                                 (list ".*<\\(.*\\)\\.\\(non\\)?gnu\\.org>.*" "l.\\1")
+                                 ;; *@lists.sr.ht, omitting one dot if present
+                                 ;;    add more \\.?\\([^.@]*\\) if needed
+                                 (list ".*<~\\(.*\\)/\\([^.@]*\\)\\.?\\([^.@]*\\)@lists.sr.ht>.*" "l.~\\1.\\2\\3")
                                  ;; webmasters
                                  (from "webmasters\\(-comment\\)?@gnu\\.org" "webmasters")
-                                 ;; haskell
-                                 (list ".*haskell-art.we.lurk.org" "l.haskell.art")
-                                 (list ".*haskell-cafe.haskell.org" "l.haskell.cafe")
                                  ;; other
                                  (list ".*atreus.freelists.org" "l.atreus")
                                  (list ".*deepspec.lists.cs.princeton.edu" "l.deepspec")
-                                 (list ".*notmuch.notmuchmail.org" "l.notmuch")
-                                 (list ".*dev.lists.parabola.nu" "l.parabola-dev")
-                                 ;; *@lists.sr.ht
-                                 (list ".*~\\(.*\\)/\\(.*\\)@lists.sr.ht" "l.~\\1.\\2")
+                                 ;; (list ".*haskell-art.we.lurk.org" "l.haskell.art") ;d
+                                 (list ".*haskell-cafe.haskell.org" "l.haskell-cafe")
+                                 ;; (list ".*notmuch.notmuchmail.org" "l.notmuch") ;u
+                                 ;; (list ".*dev.lists.parabola.nu" "l.parabola-dev") ;u
+                                 ;; ----------------------------------
+                                 ;; legend: (u)nsubscribed | (d)ead
+                                 ;; ----------------------------------
+                                 ;; otherwise, leave mail in INBOX
                                  "INBOX")))
      (nnimap "uw"
              (nnimap-stream plain)
@@ -1622,9 +1763,9 @@ For disabling the behaviour for certain buffers and/or modes."
              (nnimap-split-methods 'nnimap-split-fancy)
              (nnimap-split-fancy (|
                                   ;; (: gnus-registry-split-fancy-with-parent)
-                                  ;; se463-s19
-                                  ("subject" "\\(SE\\s-?463\\|Deliverable\\)" "course.se463-s19")
-                                  (from "\\(SE\\s-?463\\|Gema\\|Hemant\\|Davood\\|Camilo\\|Reza\\|Michael\\|Sandy\\)" "course.se463-s19")
+                                  ;; se212-f19
+                                  ("subject" "SE\\s-?212" "course.se212-f19")
+                                  (from "SE\\s-?212" "course.se212-f19")
                                   ;; catch-all
                                   "INBOX")))
      (nnimap "csc"
@@ -1671,6 +1812,18 @@ For disabling the behaviour for certain buffers and/or modes."
       (to-address . "fencepost-users@gnu.org")
       (to-list    . "fencepost-users@gnu.org")
       (list-identifier . "\\[Fencepost-users\\]"))
+     ("l\\.gnewsense-art"
+      (to-address . "gnewsense-art@nongnu.org")
+      (to-list    . "gnewsense-art@nongnu.org")
+      (list-identifier . "\\[gNewSense-art\\]"))
+     ("l\\.gnewsense-dev"
+      (to-address . "gnewsense-dev@nongnu.org")
+      (to-list    . "gnewsense-dev@nongnu.org")
+      (list-identifier . "\\[Gnewsense-dev\\]"))
+     ("l\\.gnewsense-users"
+      (to-address . "gnewsense-users@nongnu.org")
+      (to-list    . "gnewsense-users@nongnu.org")
+      (list-identifier . "\\[gNewSense-users\\]"))
      ("l\\.gnunet-developers"
       (to-address . "gnunet-developers@gnu.org")
       (to-list    . "gnunet-developers@gnu.org")
@@ -1770,12 +1923,18 @@ For disabling the behaviour for certain buffers and/or modes."
   (require 'ebdb-mua)
   (require 'ebdb-gnus)
 
+  (when (version< emacs-version "27")
+    (add-to-list
+     'nnmail-split-abbrev-alist
+     '(list . "list-id\\|list-post\\|x-mailing-list\\|x-beenthere\\|x-loop")
+     t))
+
   ;; (gnus-registry-initialize)
 
   (with-eval-after-load 'recentf
     (add-to-list 'recentf-exclude gnus-home-directory)))
 
-(use-package gnus-art
+(use-feature gnus-art
   :config
   (setq
    gnus-buttonized-mime-types '("multipart/\\(signed\\|encrypted\\)")
@@ -1803,7 +1962,7 @@ For disabling the behaviour for certain buffers and/or modes."
    :map gnus-article-mode-map
    ("M-L" . org-store-link)))
 
-(use-package gnus-sum
+(use-feature gnus-sum
   :bind (:map gnus-summary-mode-map
               :prefix-map b/gnus-summary-prefix-map
               :prefix "v"
@@ -1814,9 +1973,13 @@ For disabling the behaviour for certain buffers and/or modes."
   (bind-keys
    :map gnus-summary-mode-map
    ("M-L" . org-store-link))
-  :hook (gnus-summary-mode . b/no-mouse-autoselect-window))
+  :hook (gnus-summary-mode . b/no-mouse-autoselect-window)
+  :custom
+  (gnus-thread-sort-functions '(gnus-thread-sort-by-number
+                                gnus-thread-sort-by-subject
+                                gnus-thread-sort-by-date)))
 
-(use-package gnus-msg
+(use-feature gnus-msg
   :config
   (defvar b/signature "Amin Bandali
 Free Software Activist | GNU Webmaster & Volunteer
@@ -1831,9 +1994,9 @@ Cheriton School of Computer Science
 University of Waterloo
 https://bandali.eu.org")
   (defvar b/csc-signature "Amin Bandali
-Termcom, Computer Science Club
-University of Waterloo
-https://bandali.eu.org")
+Systems Committee
+Computer Science Club, University of Waterloo
+https://csclub.uwaterloo.ca/~abandali")
   (setq gnus-posting-styles
         '((".*"
            (address "amin@shemshak.org")
@@ -1858,44 +2021,44 @@ https://bandali.eu.org")
            (signature b/csc-signature)
            (gcc "nnimap+csc:Sent")))))
 
-(use-package gnus-topic
+(use-feature gnus-topic
   :hook (gnus-group-mode . gnus-topic-mode)
   :config (setq gnus-topic-line-format "%i[ %A: %(%{%n%}%) ]%v\n"))
 
-(use-package gnus-agent
+(use-feature gnus-agent
   :config
   (setq gnus-agent-synchronize-flags 'ask)
   :hook (gnus-group-mode . gnus-agent-mode))
 
-(use-package gnus-group
+(use-feature gnus-group
   :config
   (setq gnus-permanently-visible-groups "\\(:INBOX$\\|:gnu$\\)"))
 
 (comment
   ;; problematic with ebdb's popup, *EBDB-Gnus*
-  (use-package gnus-win
+  (use-feature gnus-win
     :config
     (setq gnus-use-full-window nil)))
 
-(use-package gnus-dired
+(use-feature gnus-dired
   :commands gnus-dired-mode
   :init
   (add-hook 'dired-mode-hook 'gnus-dired-mode))
 
-(use-package mm-decode
+(use-feature mm-decode
   :config
   (setq mm-discouraged-alternatives '("text/html" "text/richtext")
         mm-decrypt-option 'known
         mm-verify-option 'known))
 
-(use-package sendmail
+(use-feature sendmail
   :config
   (setq sendmail-program (executable-find "msmtp")
         ;; message-sendmail-extra-arguments '("-v" "-d")
         mail-specify-envelope-from t
         mail-envelope-from 'header))
 
-(use-package message
+(use-feature message
   :config
   ;; redefine for a simplified In-Reply-To header
   ;; (see https://todo.sr.ht/~sircmpwn/lists.sr.ht/67)
@@ -1942,15 +2105,15 @@ https://bandali.eu.org")
   ;; (message-header-cc      ((t (:foreground "#333" :weight normal))))
   )
 
-(use-package mml
+(use-feature mml
   :delight " mml")
 
-(use-package mml-sec
+(use-feature mml-sec
   :custom
   (mml-secure-openpgp-encrypt-to-self t)
   (mml-secure-openpgp-sign-with-sender t))
 
-(use-package footnote
+(use-feature footnote
   :after message
   ;; :config
   ;; (setq footnote-start-tag ""
@@ -1959,7 +2122,7 @@ https://bandali.eu.org")
   :bind
   (:map message-mode-map
         :prefix-map b/footnote-prefix-map
-        :prefix "C-c f"
+        :prefix "C-c f n"
         ("a" . footnote-add-footnote)
         ("b" . footnote-back-to-message)
         ("c" . footnote-cycle-style)
@@ -1976,7 +2139,7 @@ https://bandali.eu.org")
   (with-eval-after-load 'swiper
     (add-to-list 'swiper-font-lock-exclude 'ebdb-mode t)))
 
-(use-package ebdb-com
+(use-feature ebdb-com
   :after ebdb)
 
 ;; (use-package ebdb-complete
@@ -1988,18 +2151,12 @@ https://bandali.eu.org")
   :config
   (defun company-ebdb--post-complete (_) nil))
 
-(use-package ebdb-gnus
+(use-feature ebdb-gnus
   :after ebdb
   :custom
-  (ebdb-gnus-window-configuration
-   '(article
-     (vertical 1.0
-               (summary 0.25 point)
-               (horizontal 1.0
-                           (article 1.0)
-                           (ebdb-gnus 0.3))))))
-
-(use-package ebdb-mua
+  (ebdb-gnus-window-size 0.3))
+
+(use-feature ebdb-mua
   :after ebdb
   ;; :custom (ebdb-mua-pop-up nil)
   )
@@ -2033,11 +2190,19 @@ https://bandali.eu.org")
         (gnus-harvest-install 'message-x)
       (gnus-harvest-install))))
 
+(use-feature gnus-article-treat-patch
+  :disabled
+  :demand
+  :load-path "lisp/"
+  :config
+  (setq ft/gnus-article-patch-conditions
+        '("^@@ -[0-9]+,[0-9]+ \\+[0-9]+,[0-9]+ @@")))
+
 
 ;;; IRC (with ERC and ZNC)
 
-(use-package erc
-  :bind (("C-c a e b" . erc-switch-to-buffer)
+(use-feature erc
+  :bind (("C-c b e" . erc-switch-to-buffer)
          :map erc-mode-map
          ("M-a" . erc-track-switch-buffer))
   :custom
@@ -2049,9 +2214,6 @@ https://bandali.eu.org")
   (erc-server-reconnect-attempts 5)
   (erc-server-reconnect-timeout 3)
   :config
-  (with-eval-after-load 'ivy
-    ;; ignore channel buffer names
-    (add-to-list 'ivy-ignore-buffers "^#"))
   (defun erc-cmd-OPME ()
     "Request chanserv to op me."
     (erc-message "PRIVMSG"
@@ -2065,22 +2227,97 @@ https://bandali.eu.org")
   (add-to-list 'erc-modules 'notifications)
   (add-to-list 'erc-modules 'spelling)
   (add-to-list 'erc-modules 'scrolltoplace)
-  (erc-update-modules))
-
-(use-package erc-fill
+  (erc-update-modules)
+
+  (when (and (version<= "24.4" emacs-version)
+             (version<         emacs-version "27"))
+    ;; fix erc-lurker bug
+    ;; patch submitted: https://bugs.gnu.org/36843#10
+    ;; TODO: remove when patch is merged and emacs 27 is released
+    (defvar erc-message-parsed)
+    (defun erc-display-message (parsed type buffer msg &rest args)
+      "Display MSG in BUFFER.
+
+ARGS, PARSED, and TYPE are used to format MSG sensibly.
+
+See also `erc-format-message' and `erc-display-line'."
+      (let ((string (if (symbolp msg)
+                        (apply #'erc-format-message msg args)
+                      msg))
+            (erc-message-parsed parsed))
+        (setq string
+              (cond
+               ((null type)
+                string)
+               ((listp type)
+                (mapc (lambda (type)
+                        (setq string
+                              (erc-display-message-highlight type string)))
+                      type)
+                string)
+               ((symbolp type)
+                (erc-display-message-highlight type string))))
+
+        (if (not (erc-response-p parsed))
+            (erc-display-line string buffer)
+          (unless (erc-hide-current-message-p parsed)
+            (erc-put-text-property 0 (length string) 'erc-parsed parsed string)
+            (erc-put-text-property 0 (length string) 'rear-sticky t string)
+            (when (erc-response.tags parsed)
+              (erc-put-text-property 0 (length string) 'tags (erc-response.tags parsed)
+                                     string))
+            (erc-display-line string buffer)))))
+
+    (defun erc-lurker-update-status (_message)
+      "Update `erc-lurker-state' if necessary.
+
+This function is called from `erc-insert-pre-hook'.  If the
+current message is a PRIVMSG, update `erc-lurker-state' to
+reflect the fact that its sender has issued a PRIVMSG at the
+current time.  Otherwise, take no action.
+
+This function depends on the fact that `erc-display-message'
+lexically binds `erc-message-parsed', which is used to check if
+the current message is a PRIVMSG and to determine its sender.
+See also `erc-lurker-trim-nicks' and `erc-lurker-ignore-chars'.
+
+In order to limit memory consumption, this function also calls
+`erc-lurker-cleanup' once every `erc-lurker-cleanup-interval'
+updates of `erc-lurker-state'."
+      (when (and (boundp 'erc-message-parsed)
+                 (erc-response-p erc-message-parsed))
+        (let* ((command (erc-response.command erc-message-parsed))
+               (sender
+                (erc-lurker-maybe-trim
+                 (car (erc-parse-user (erc-response.sender erc-message-parsed)))))
+               (server
+                (erc-canonicalize-server-name erc-server-announced-name)))
+          (when (equal command "PRIVMSG")
+            (when (>= (cl-incf erc-lurker-cleanup-count)
+                      erc-lurker-cleanup-interval)
+              (setq erc-lurker-cleanup-count 0)
+              (erc-lurker-cleanup))
+            (unless (gethash server erc-lurker-state)
+              (puthash server (make-hash-table :test 'equal) erc-lurker-state))
+            (puthash sender (current-time)
+                     (gethash server erc-lurker-state))))))))
+
+(use-feature erc-fill
   :after erc
   :custom
   (erc-fill-column 77)
   (erc-fill-function 'erc-fill-static)
   (erc-fill-static-center 18))
 
-(use-package erc-pcomplete
+(use-feature erc-pcomplete
   :after erc
   :custom
   (erc-pcomplete-nick-postfix ","))
 
-(use-package erc-track
+(use-feature erc-track
   :after erc
+  :bind (("C-c a e t d" . erc-track-disable)
+         ("C-c a e t e" . erc-track-enable))
   :custom
   (erc-track-enable-keybindings nil)
   (erc-track-exclude-types '("JOIN" "MODE" "NICK" "PART" "QUIT"
@@ -2095,7 +2332,7 @@ https://bandali.eu.org")
   :after erc)
 
 (use-package znc
-  :load-path "lisp/znc.el/"
+  :straight (:host nil :repo "https://git.shemshak.org/amin/znc.el")
   :bind (("C-c a e e" . znc-erc)
          ("C-c a e a" . znc-all))
   :config