path: root/.config/emacs/init.el

;; Hey, Emacs: -*- Indent-tabs-mode: nil -*-

;; This config requires Emacs 27.
;; With some differences in package.el initialization it should work with Emacs 24.4(+?).
;; Without (advice-add) it should work in older versions of Emacs 24.

;;;; Use XDG-ish locations ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(let ((xdg-cache-home (file-name-as-directory (or (getenv "XDG_CACHE_HOME") "~/.cache")))
      (xdg-data-home  (file-name-as-directory (or (getenv "XDG_DATA_HOME") "~/.local/share"))))
  (setq
   wl-init-file                 (concat user-emacs-directory "wl.el")
   eshell-directory-name        (concat xdg-data-home "emacs/eshell/") ;; actually should be split between config and data
   ido-save-directory-list-file (concat xdg-data-home "emacs/ido.last.el")

   package-user-dir             (concat xdg-cache-home "emacs/elpa")
   el-get-dir                   (concat xdg-cache-home "emacs/el-get/")
   wl-score-files-directory     (concat xdg-cache-home "emacs/wl-score-files/")
   elmo-msgdb-directory         (concat xdg-cache-home "emacs/elmo-msgdb/")
   elmo-cache-directory         (concat xdg-cache-home "emacs/elmo-cache/")
   auto-save-list-file-prefix   (concat xdg-cache-home "emacs/auto-save-list/saves-")
   tramp-persistency-file-name  (concat xdg-cache-home "emacs/tramp-cache.el")
   ))

(setq custom-file (concat user-emacs-directory "custom.el"))
(load custom-file 'noerror)

;;;; The basics that I can't use Emacs without ;;;;;;;;;;;;;;;;;;;;;;;
(show-paren-mode 1)
(column-number-mode 1)
(line-number-mode 1)
(ido-mode 1)
(unless (daemonp) (server-mode 1))
(when (require 'whitespace nil t)
  (setq whitespace-style '(
        tab-mark
        space-mark
        newline-mark
        empty
        ))
  (global-set-key "\C-cw" 'global-whitespace-mode))
(setq minibuffer-prompt-properties '(
      read-only t
      point-entered minibuffer-avoid-prompt
      face minibuffer-prompt
      ))


;;;; Early settings ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; This isn't particularly important, but set it before doing a whole
;; lot (loading packages), so there isn't a weird change in text size.
(set-face-attribute 'default nil
                    :family "DejaVu Sans Mono"
                    :height 80
                    ;:weight 'semi-bold
                    )


;;;; Package management ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; package.el
(when (require 'package)
  ;; Don't clutter custom.el with `package-selected-packages`; I want
  ;; to exclusively use use-package for this.
  (defun package--save-selected-packages--nocustom (&optional value)
    "Set `package-selected-packages' to VALUE."
    (when value
      (setq package-selected-packages value)))
  (advice-add 'package--save-selected-packages
              :override #'package--save-selected-packages--nocustom)
  ;; Add Melpa repos.
  (add-to-list 'package-archives
               '("melpa-stable" . "https://stable.melpa.org/packages/") t)
  (add-to-list 'package-archives
               '("melpa" . "http://melpa.org/packages/") t)
  ;; Always prefer versions from GNU > Melpa-Stable > Melpa, even if the
  ;; later have higher version numbers.
  (setq package-archive-priorities
        '(("gnu"          . 99)
          ("melpa-stable" .  5)
          ("melpa"        .  0)))
  (package-initialize))

;; use-package.el
(eval-when-compile
  (add-to-list 'load-path (concat user-emacs-directory "use-package"))
  (require 'use-package)
  (setq use-package-always-ensure t))
(require 'bind-key)

;; Themes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package modus-themes
  :config (progn
            ;; Modus makes MMM regions almost impossible to see
            (add-hook 'modus-themes-after-load-theme-hook
                      (lambda ()
                        (modus-themes-with-colors
                          (custom-set-faces
                           `(mmm-cleanup-submode-face     ((,class :background ,yellow-refine-bg)))
                           `(mmm-code-submode-face        ((,class :background ,bg-active)))
                           `(mmm-comment-submode-face     ((,class :background ,blue-refine-bg)))
                           `(mmm-declaration-submode-face ((,class :background ,cyan-refine-bg)))
                           `(mmm-default-submode-face     ((,class :background ,bg-alt)))
                           `(mmm-init-submode-face        ((,class :background ,magenta-refine-bg)))
                           `(mmm-output-submode-face      ((,class :background ,red-refine-bg)))
                           `(mmm-special-submode-face     ((,class :background ,green-refine-bg)))))
                        ))
            ;; Load the theme.  Use this function instead of
            ;; load-theme in order to get the above hook.
            (modus-themes-load-vivendi)
            ))

;; Minor modes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package editorconfig
  :config (progn
            (editorconfig-mode 1)
            (add-to-list 'editorconfig-indentation-alist '(protobuf-mode c-basic-offset))
            (add-to-list 'editorconfig-indentation-alist '(terraform-mode terra-indent-level
                                                                          terraform-indent-level
                                                                          hcl-indent-level))
            ))
(use-package jq-format
  :commands (jq-format-json-buffer
             jq-format-json-region
             jq-format-json-on-save-mode
             jq-format-jsonlines-buffer
             jq-format-jsonlines-region
             jq-format-jsonlines-on-save-mode))
(use-package multiple-cursors
  :bind (("C-c m l" . mc/edit-lines)
         ("C-c m n" . mc/insert-numbers)))
(use-package outline-magic
  :commands (outline-cycle
             outline-next-line
             outline-move-subtree-up
             outline-move-subtree-down
             outline-promote
             outline-demote))
(use-package page-break-lines ;; Display form-feeds pretty
  :init (advice-add 'page-break-lines-mode-maybe
                    :override #'page-break-lines-mode)
  :config (global-page-break-lines-mode 1))
(use-package smart-tabs-mode ;; Indent with tabs, align with spaces
  :config (progn
            (smart-tabs-mode 1)
            (apply 'smart-tabs-insinuate
                   (mapcar 'car smart-tabs-insinuate-alist))))

;; Major modes (non-HTML-related) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package bats-mode         :mode "\\.bats\\'")
(use-package bazel
  :mode (((rx "/" (or "BUILD" "BUILD.bazel") eos)         . bazel-build-mode)
         ((rx "/" (or "WORKSPACE" "WORKSPACE.bazel") eos) . bazel-workspace-mode)
         ((rx "/" (+ nonl) ".bzl" eos)                    . bazel-starlark-mode)
         ((rx "/" (or "bazel.bazelrc" ".bazelrc") eos)    . bazelrc-mode)
         ((rx "/.bazelignore" eos)                        . bazelignore-mode)))
(use-package bison-mode
  :mode (("\\.l\\'" . bison-mode)
         ("\\.y\\'" . bison-mode)
         ("\\.jison\\'" . jison-mode)))
(use-package cmake-mode        :mode ("CMakeLists\\.txt\\'" "\\.cmake\\'"))
(use-package dockerfile-mode
  :mode "Dockerfile\\(?:\\..*\\)?\\'"
  :commands (dockerfile-build-buffer
             dockerfile-build-no-cache-buffer))
(use-package glsl-mode         :mode ("\\.vert\\'" "\\.frag\\'" "\\.geom\\'" "\\.glsl\\'"))
(use-package go-mode           :mode ("\\.go\\'" "go\\.mod"))
(use-package graphql-mode      :mode ("\\.graphql\\'" "\\.gql\\'"))
(use-package graphviz-dot-mode
  :mode ("\\.dot\\'" "\\.gv\\'")
  :config (add-hook 'graphviz-dot-mode-hook
                    (lambda ()
                      (set (make-local-variable 'graphviz-dot-auto-indent-on-semi) nil)
                      )))
(use-package jq-mode
  :mode "\\.jq\\'"
  :interpreter "jq")
(use-package lua-mode
  :mode "\\.lua\\'"
  :interpreter "lua")
(use-package markdown-mode     :mode ("\\.markdown\\'" "\\.md\\'" "\\.ronn\\'"))
(use-package meson-mode        :mode "/meson\\(\\.build\\|_options\\.txt\\)\\'")
(use-package nginx-mode        :mode ("nginx\\.conf\\'" "/nginx/.+\\.conf\\'"))
(use-package protobuf-mode     :mode "\\.proto\\'")
(use-package terraform-mode    :mode "\\.tf\\(vars\\)?\\'")
(use-package yaml-mode
  :mode "\\.\\(e?ya?\\|ra\\)ml\\'"
  :config (add-hook 'yaml-mode-hook
                    (lambda ()
                      (outline-minor-mode t)
                      (set (make-local-variable 'outline-regexp) "[ \t]*[A-Za-z-]")
                      )))

;; Major modes (HTML-related) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package coffee-mode
  :mode ("\\.coffee\\'"
         "\\.iced\\'"
         "\\Cakefile\\'"
         "\\.cson\\'")
  :interpreter "coffee"
  :config (add-hook 'coffee-mode-hook
                    (lambda ()
                      (set (make-local-variable 'tab-width) 2)
                      (set (make-local-variable 'indent-tabs-mode) nil)
                      )))
(use-package haml-mode         :mode "\\.haml\\'")
(use-package less-css-mode     :mode "\\.less\\'")
(use-package php-mode
  :mode ("\\.php[s345t]?\\'" "/\\.php_cs\\(\\.dist\\)?\\'" "\\.phtml\\'" "/Amkfile\\'" "\\.amk\\'")
  :interpreter "php\\(?:-?[3457]\\(?:\\.[0-9]+\\)*\\)?")
(use-package scss-mode         :mode "\\.scss\\'")
(use-package typescript-mode   :mode "\\.tsx?\\'")
(use-package web-mode
  :mode ("\\.html\\'"
         "\\.vue\\'"))
(use-package mmm-mode
  :load mmm-auto
  :config (progn
            ;; Define the class
            (mmm-add-classes
             '((js-graphql
                :submode graphql-mode
                :face mmm-code-submode-face
                :front "[^a-zA-Z]graphql`"
                :back "`")))
            ;; Add too mmm-mode-ext-classes-alist
            (mmm-add-mode-ext-class 'js-mode nil 'js-graphql)
            (setq
             ;; Enable MMM for modes/files named in
             ;; mmm-mode-ext-classes-alist, and only modes/files named
             ;; in mmm-mode-ext-classes-alist.
             mmm-global-mode 'maybe
             ;; 0 = none, 1 = low, 2 = high
             mmm-submode-decoration-level 2)
            ))

;; Email ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(if (file-exists-p "~/Maildir")
    (use-package wanderlust
      :commands (wl)
      :config (progn
                (define-mail-user-agent
                  'wl-user-agent
                  'wl-user-agent-compose
                  'wl-draft-send
                  'wl-draft-kill
                  'mail-send-hook)
                (setq mail-user-agent 'wl-user-agent))))


;; Misc. crap

(when (fboundp 'tool-bar-mode) (tool-bar-mode -1))
(when (fboundp 'scroll-bar-mode) (scroll-bar-mode -1))
(setq inhibit-startup-screen t)
(setq-default truncate-lines t)

(defun align-regexp--use-spaces (orig-fun &rest args)
  "Use spaces for alignment"
  (let ((indent-tabs-mode nil))
    (apply orig-fun args)))
(advice-add 'align-regexp :around
           #'align-regexp--use-spaces)

(defun sh-smie-sh-rules--fix (args)
  "Replace :after \"then\" with :after \"if\" because Emacs 24
sh-script.el is broken."
  (if (equal args (list :after "then"))
      (list :after "if")
    args))
(advice-add 'sh-smie-sh-rules :filter-args
           #'sh-smie-sh-rules--fix)

;; Ideally, figuring this out should be done by uniquify, but I
;; haven't determined how to get uniquify to think that it manages the
;; term buffer.
(defun term-get-short-cwd ()
    ;; local base=$PWD
    ;; local suffix=''
    ;; # The regex here is a list of directory names
    ;; # that aren't really helpful, and that the
    ;; # parent directory should be included also.
    ;; if [[ $base =~ (/(src|pkg|doc|pkg-libre|src-libre|trunk|tags|branches))*$ ]]; then
    ;;         suffix=$BASH_REMATCH
    ;;         base=${base%$suffix}
    ;; fi
    ;; base=${base##*/}
    ;; echo ${base}${suffix}
    (directory-file-name default-directory))
(defun term-handle-ansi-terminal-messages--uniquify (args)
  (rename-buffer (concat
                  (replace-regexp-in-string "<.*>$" "" (buffer-name))
                  "<"
                  (term-get-short-cwd)
                  ">")
                 t))
(advice-add 'term-handle-ansi-terminal-messages :after
           #'term-handle-ansi-terminal-messages--uniquify)



;; Make the mouse work in an xterm
(when (fboundp 'xterm-mouse-mode)
  (xterm-mouse-mode 1)
  (add-hook 'after-make-frame-functions
            (lambda (frame)
              (if xterm-mouse-mode (xterm-mouse-mode 1))
              )))

;; Make TRAMP obey ~/.ssh/config for ControlMaster.  For some reason,
;; customize doesn't correctly set this.
(setq tramp-use-ssh-controlmaster-options nil)

;; Use mailcrypt to encrypt/decrypt email
(when (require 'mailcrypt nil t)
  (mc-setversion "gpg")
  (add-hook 'wl-summary-mode-hook 'mc-install-read-mode)
  (add-hook 'wl-mail-setup-hook 'mc-install-write-mode)
  (defun mc-wl-verify-signature ()
    (interactive)
    (save-window-excursion
      (wl-summary-jump-to-current-message)
      (mc-verify)))
  (defun mc-wl-decrypt-message ()
    (interactive)
    (save-window-excursion
      (wl-summary-jump-to-current-message)
      (let ((inhibit-read-only t))
        (mc-decrypt))))
  (eval-after-load "mailcrypt"
    '(setq mc-modes-alist
           (append
            (quote
             ((wl-draft-mode (encrypt . mc-encrypt-message)
                             (sign . mc-sign-message))
              (wl-summary-mode (decrypt . mc-wl-decrypt-message)
                               (verify . mc-wl-verify-signature))))
            mc-modes-alist)))
  )

;; Indent settings
(setq-default
 indent-tabs-mode t
 tab-width 8
 c-basic-offset 8
 sh-basic-offset 8
 sh-indent-comment t
 )

;; Backup settings
(setq
 backup-by-copying      t ;; don't clobber symlinks
 backup-directory-alist '(("." . "~/.cache/emacs/saves")) ;; don't litter my fs tree
 delete-old-versions    t
 kept-new-versions      6
 kept-old-versions      2
 version-control        t ;; use versioned backups

 create-lockfiles       nil ;; don't litter my fs tree
 )

;; Web browser settings
(setq
 browse-url-generic-program (executable-find "v-www-browser")
 browse-url-browser-function 'browse-url-generic
 )

;; Ediff settings
(setq
 ediff-window-setup-function 'ediff-setup-windows-plain
 ediff-split-window-function 'split-window-horizontally
 )

;; Automatically load smerge mode for merge files
(defun try-smerge-mode ()
  (save-excursion
    (goto-char (point-min))
    (when (re-search-forward "^<<<<<<< " nil t)
      (smerge-mode 1))))
(add-hook 'find-file-hook 'try-smerge-mode t)

;; http://www.emacswiki.org/emacs/XModMapMode
(when (not (fboundp 'xmodmap-mode))
  (define-generic-mode 'xmodmap-mode
    '(?!)
    '("add" "clear" "keycode" "keysym" "pointer" "remove")
    nil
    '("[xX]modmap\\(rc\\)?\\'")
    nil
    "Simple mode for xmodmap files."))


;; All my weird mode-specific settings ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(add-hook 'text-mode-hook 'turn-on-auto-fill)

(add-hook 'lisp-mode-hook
          (lambda ()
            (set (make-local-variable 'indent-tabs-mode) nil)
            ))

(add-hook 'emacs-lisp-mode-hook
          (lambda ()
            (set (make-local-variable 'indent-tabs-mode) nil)
            ))

(add-hook 'term-mode-hook
          (lambda ()
            (auto-fill-mode -1)
            (setq term-prompt-regexp "^[^#$%>\n]*[#$%>] *")
            (set (make-local-variable 'mouse-yank-at-point) t)
            (setq tab-width 8 )
            (setq truncate-lines nil)
            (set (make-local-variable 'autopair-dont-activate) t) ;; Don't let autopair break ansi-term
            ))

(add-hook 'ruby-mode-hook
          (lambda ()
            (set (make-local-variable 'indent-tabs-mode) t)
            (set (make-local-variable 'ruby-indent-level) 4)
            (set (make-local-variable 'tab-width) 4)
            ))

(add-hook 'tex-mode-hook
          (lambda ()
            (set (make-local-variable 'tab-always-indent) nil)
            (set (make-local-variable 'indent-tabs-mode) t)
            ))

(add-hook 'sh-mode-hook
          (lambda ()
            (sh-electric-here-document-mode 0)
            ))

(add-hook 'erc-mode-hook
          (lambda ()
            (define-key erc-mode-map (kbd "C-c C-u") 'erc-cmd-QUERY)
            ))

(add-hook 'js-mode-hook
          (lambda ()
            (hs-minor-mode t)
            (local-set-key [C-tab] 'hs-toggle-hiding)
            ))

(add-hook 'python-mode-hook
          (lambda ()
            (hs-minor-mode t)
            (local-set-key [C-tab] 'hs-toggle-hiding)
            ))

(add-hook 'outline-minor-mode-hook
          (lambda ()
            (define-key outline-minor-mode-map [C-tab] 'outline-cycle)))

(add-hook 'web-mode-hook
          (lambda ()
            (setq web-mode-enable-auto-closing nil)
            (setq web-mode-enable-auto-pairing nil)
            (setq web-mode-enable-auto-opening nil)
            (setq web-mode-enable-auto-quoting nil)
            (setq web-mode-enable-auto-expanding nil)
            (setq web-mode-enable-auto-indentation nil)
            ))

(add-to-list 'auto-mode-alist '("PKGBUILD" . sh-mode))
(add-to-list 'auto-mode-alist '("SRCBUILD" . sh-mode))
(add-to-list 'auto-mode-alist '("\\.mak\\'" . makefile-gmake-mode))
(add-to-list 'auto-mode-alist '("\\.jad\\'" . java-mode))
(add-to-list 'auto-mode-alist '("\\.schema\\'" . js-mode))

(eval-when-compile
  (add-to-list 'load-path (concat user-emacs-directory "go-template-mode"))
  (require 'go-template-mode))


;; Anything that gets magically appended ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;