feat(users/sterni): add emacs configuration r/2755

Change-Id: Icbdb52ba5ea51e8594eb46c5f0740e4f7c353be4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3381
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

3 files changed, 296 insertions, 0 deletions

diff --git a/users/sterni/emacs/default.nix b/users/sterni/emacs/default.nix
new file mode 100644
index 000000000000..63a0fc19c150
--- /dev/null
+++ b/users/sterni/emacs/default.nix
@@ -0,0 +1,40 @@
+{ depot, pkgs, ... }:
+
+let
+  inherit (pkgs.emacsGcc.pkgs) withPackages;
+
+  emacs = withPackages (epkgs: [
+    # basic setup
+    epkgs.elpaPackages.undo-tree
+    epkgs.melpaPackages.evil
+    epkgs.melpaPackages.evil-collection
+    epkgs.melpaPackages.use-package
+    # languages
+    epkgs.elpaPackages.ada-mode
+    epkgs.melpaPackages.adoc-mode
+    epkgs.melpaPackages.dockerfile-mode
+    epkgs.melpaPackages.haskell-mode
+    epkgs.melpaPackages.markdown-mode
+    epkgs.melpaPackages.nix-mode
+    epkgs.melpaPackages.sly
+    epkgs.melpaPackages.yaml-mode
+    epkgs.urweb-mode
+    # misc
+    epkgs.melpaPackages.hl-todo
+    epkgs.elpaPackages.rainbow-mode
+    epkgs.melpaPackages.rainbow-delimiters
+    # beyond text editing
+    epkgs.melpaPackages.elfeed
+    epkgs.melpaPackages.magit
+    epkgs.tvlPackages.tvl
+  ]);
+in
+
+# sadly we can't give an init-file via the command line
+pkgs.writeShellScriptBin "emacs" ''
+  exec ${emacs}/bin/emacs     \
+    --no-init-file            \
+    --directory ${./.}        \
+    --eval "(require 'init)" \
+    "$@"
+''
diff --git a/users/sterni/emacs/init.el b/users/sterni/emacs/init.el
new file mode 100644
index 000000000000..55af80612bf2
--- /dev/null
+++ b/users/sterni/emacs/init.el
@@ -0,0 +1,178 @@
+;; Set default font and fallback font via set-fontset-font
+;; TODO(sterni): Investigate non-emoji representation of some glyphs
+(let ((mono-font "Bitstream Vera Sans Mono-12")
+      (emoji-font "Noto Color Emoji-12"))
+  (setq default-frame-alist `((font . ,mono-font)))
+  (set-frame-font mono-font t t)
+  (set-fontset-font t nil emoji-font))
+
+(setq inhibit-startup-message t
+      display-time-24hr-format t
+      select-enable-clipboard t)
+
+;; Reload files
+(global-auto-revert-mode 1)
+
+;; Indent
+(set-default 'indent-tabs-mode nil)
+(setq tab-width 2)
+
+;; UTF-8
+(setq locale-coding-system 'utf-8)
+(set-terminal-coding-system 'utf-8)
+(set-keyboard-coding-system 'utf-8)
+(set-selection-coding-system 'utf-8)
+(prefer-coding-system 'utf-8)
+
+;; Disable unnecessary GUI elements
+(scroll-bar-mode 0)
+(menu-bar-mode 0)
+(tool-bar-mode 0)
+
+(add-hook 'after-make-frame-functions
+          (lambda (frame) (scroll-bar-mode 0)))
+
+;; don't center on cursor when scrooling
+(setq scroll-conservatively 1)
+
+;; type less
+(defalias 'yes-or-no-p 'y-or-n-p)
+
+;; Extra settings when graphical session
+(when window-system
+  (setq frame-title-format '(buffer-file-name "%f" ("%b")))
+  (mouse-wheel-mode t)
+  (blink-cursor-mode -1))
+
+;; TODO(sterni): prevent some remaining backup files
+(setq auto-save-file-name-transforms
+      `((".*" ,temporary-file-directory t)))
+(setq backup-directory-alist
+      `((".*" . ,temporary-file-directory)))
+
+;; buffers
+;; unique component should come first for better completion
+(setq uniquify-buffer-name-style 'forward)
+
+;; Display column numbers
+(column-number-mode t)
+(setq-default fill-column 80)
+(setq display-fill-column-indicator-column t)
+(add-hook 'prog-mode-hook #'display-fill-column-indicator-mode)
+
+;; whitespace
+(setq whitespace-style '(face trailing tabs)
+      whitespace-line-column fill-column)
+(add-hook 'prog-mode-hook #'whitespace-mode)
+
+;;; Configure built in modes
+
+;; Perl
+(setq perl-indent-level 2)
+(setq perl-continued-statement-offset 0)
+(setq perl-continued-brace-offset 0)
+
+;;; Configure packages
+(require 'use-package)
+
+(package-initialize)
+
+(use-package undo-tree
+  :config
+  (global-undo-tree-mode))
+
+(use-package magit
+  :after evil
+  :config
+  ; reset (buffer-local) fill-column value to emacs' default
+  ; gerrit doesn't like 80 column commit messages…
+  (add-hook 'git-commit-mode-hook (lambda () (setq fill-column 72)))
+  (evil-define-key 'normal 'global (kbd "<leader>gr") 'magit-status))
+(use-package tvl :after magit)
+
+(setq ediff-split-window-function 'split-window-horizontally)
+
+(use-package evil
+  :init
+  (setq evil-want-integration t)
+  (setq evil-want-keybinding nil)
+  (setq evil-shift-width 2)
+  (setq evil-split-window-below t)
+  (setq evil-split-window-right t)
+  (setq evil-undo-system 'undo-tree)
+  :config
+  (evil-mode 1)
+  (evil-set-leader 'normal ",") ;; TODO(sterni): space would be nice, but…
+  (evil-set-leader 'visual ",")
+  ;; buffer management
+  (evil-define-key 'normal 'global (kbd "<leader>bk") 'kill-buffer)
+  (evil-define-key 'normal 'global (kbd "<leader>bb") 'switch-to-buffer)
+  ;; window management
+  (evil-define-key 'normal 'global (kbd "<leader>wk") 'delete-window)
+  (evil-define-key 'normal 'global (kbd "<leader>wo") 'delete-other-window)
+  (evil-define-key 'normal 'global (kbd "<leader>wh") 'split-window-below)
+  (evil-define-key 'normal 'global (kbd "<leader>wv") 'split-window-right)
+  (evil-define-key 'normal 'global (kbd "<leader>ww") 'other-window)
+  ;; emacs
+  (evil-define-key 'visual 'global (kbd "<leader>ee") 'eval-region)
+  (evil-define-key 'normal 'global (kbd "<leader>ee") 'eval-last-sexp)
+  (evil-define-key 'normal 'global (kbd "<leader>ep") 'eval-print-last-sexp)
+  (evil-define-key 'normal 'global (kbd "<leader>eh") 'help)
+  ;; modify what is displayed
+  (evil-define-key 'normal 'global (kbd "<leader>dw")
+    (lambda ()
+      (interactive)
+      (whitespace-mode 'toggle)
+      (display-fill-column-indicator-mode 'toggle)))
+  ;; elfeed bindings for evil (can't use-package elfeed apparently)
+  (evil-define-key 'normal 'global (kbd "<leader>ff") 'elfeed)
+  (evil-define-key '(normal visual) elfeed-search-mode-map
+    (kbd "o") 'elfeed-search-browse-url
+    (kbd "r") 'elfeed-search-untag-all-unread
+    (kbd "u") 'elfeed-search-tag-all-unread
+    (kbd "<leader>ff") 'elfeed-search-fetch
+    (kbd "<leader>fc") 'elfeed-db-compact
+    (kbd "<leader>fr") 'elfeed-search-update--force))
+
+(use-package evil-collection
+  :after evil
+  :config
+  (evil-collection-init))
+
+(use-package rainbow-delimiters
+  :hook (prog-mode . rainbow-delimiters-mode))
+
+(use-package nix-mode :mode "\\.nix\\'")
+(use-package nix-drv-mode :mode "\\.drv\\'")
+
+(use-package haskell-mode)
+(use-package urweb-mode)
+(use-package yaml-mode)
+(use-package dockerfile-mode)
+(use-package sly
+  :after evil
+  :hook ((sly-mrepl-mode . (lambda () (rainbow-delimiters-mode-enable))))
+  :config
+  (evil-define-key 'normal sly-mrepl-mode-map (kbd "C-r") 'isearch-backward))
+
+(use-package ada-mode)
+
+(use-package rainbow-mode)
+(use-package hl-todo
+  :hook ((prog-mode . hl-todo-mode))
+  :config
+  (setq hl-todo-keyword-faces
+        '(("TODO"  . "#FF0000")
+          ("FIXME" . "#FF0000")
+          ("HACK"  . "#7f7f7f")
+          ("XXX"   . "#aa0000"))))
+
+(use-package markdown-mode
+  :commands (markdown-mode gfm-mode)
+  :mode (("\\.md\\'" . markdown-mode)))
+(use-package adoc-mode
+  :mode (("\\.adoc\\'" . adoc-mode)))
+
+(require 'subscriptions)
+
+(provide 'init)
diff --git a/users/sterni/emacs/subscriptions.el b/users/sterni/emacs/subscriptions.el
new file mode 100644
index 000000000000..07ba5b2bc31a
--- /dev/null
+++ b/users/sterni/emacs/subscriptions.el
@@ -0,0 +1,78 @@
+;;; elfeed subscriptions
+(setq elfeed-feeds
+      `((,(with-temp-buffer
+            (insert-file-contents
+             (concat (getenv "HOME")
+                     "/.config/secrets/github-private-atom"))
+            (buffer-string))
+         dashboard)
+        ("https://repology.org/maintainer/sternenseemann%40systemli.org/feed-for-repo/nix_unstable/atom" dashboard releases)
+        ("http://hundimbuero.blogspot.com/feeds/posts/default?alt=rss" blog cool-and-nice)
+        ("gopher://text.causal.agency/0feed.atom" blog)
+        ("http://xsteadfastx.org/feed/" blog cool-and-nice)
+        ("https://hannes.robur.coop/atom" blog)
+        ("https://stevelosh.com/rss.xml" blog)
+        ("https://blog.benjojo.co.uk/rss.xml" blog)
+        ("https://leahneukirchen.org/blog/index.atom" blog cool-and-nice)
+        ("https://leahneukirchen.org/trivium/index.atom" blog links cool-and-nice)
+        ("https://tazj.in/feed.atom" blog cool-and-nice)
+        ("https://alyssa.is/feed.xml" blog cool-and-nice)
+        ("https://eta.st/feed.xml" blog cool-and-nice)
+        ("https://spectrum-os.org/git/www/atom/bibliography.html" links blog)
+        ("https://rachelbythebay.com/w/atom.xml" blog)
+        ("http://evrl.com/feed.xml" blog)
+        ("https://vulns.xyz/feed.xml" blog)
+        ("https://linuxrocks.online/@dnkl.rss" releases)
+        ("https://www.german-foreign-policy.com/?type=9818" news)
+        ("https://niedzejkob.p4.team/rss.xml" blog)
+        ("https://grahamc.com/feed/" blog)
+        ("https://michael.stapelberg.ch/feed.xml" blog)
+        ("https://kazu-yamamoto.hatenablog.jp/feed" blog)
+        ("https://bodil.lol/rss.xml" blog)
+        ("http://blog.nullspace.io/feed.xml" blog)
+        ("https://blog.kingcons.io/rss.xml" blog)
+        ("http://jaspervdj.be/rss.xml" blog)
+        ("https://christine.website/blog.rss" blog)
+        ("https://drewdevault.com/feed.xml" blog)
+        ("https://www.imperialviolet.org/iv-rss.xml" blog)
+        ("https://latacora.micro.blog/feed.xml" blog)
+        ("https://22gato.tumblr.com/rss" pictures cool-and-nice)
+        ("https://theprofoundprogrammer.com/rss" blog)
+        ("https://wiki.openlab-augsburg.de/_feed" openlab)
+        ("http://shitopenlabsays.tumblr.com/rss" openlab)
+        ("http://suckless.org/atom.xml" releases)
+        ("https://kristaps.bsd.lv/lowdown/atom.xml" releases)
+        ("https://www.tweag.io/rss.xml" blog)
+        ("http://planet.haskell.org/atom.xml" planet blog)
+        ("http://0pointer.net/blog/index.atom" blog)
+        ("https://emacsninja.com/feed.atom" blog)
+        ("https://emacshorrors.com/feed.atom" blog)
+        ("http://therealmntmn.tumblr.com/rss" blog)
+        ("http://blog.duangle.com/feeds/posts/default" blog)
+        ("http://blog.johl.io/atom.xml" blog)
+        ("http://blog.z3bra.org/rss/feed.xml" blog)
+        ("http://ccc.de/de/rss/updates.xml" news)
+        ;; ("http://fabienne.us/feed/" blog) ; database error
+        ("http://feeds.feedburner.com/baschtcom" blog)
+        ("http://ffaaaffaffaffaa.tumblr.com/rss" pictures)
+        ("http://fnordig.de/feed.xml" blog)
+        ("http://fotografiona.tumblr.com/rss" pictures)
+        ("https://grandhotel-cosmopolis.org/de/feed" news)
+        ("http://guteaussicht.org/rss" pictures)
+        ("http://konvergenzfehler.de/feed/" blog)
+        ("https://markuscisler.com/feed.xml" blog)
+        ("http://n00bcore.de/feed/" podcast)
+        ("http://spacethatneverwas.tumblr.com/rss" pictures)
+        ("http://theresa.someserver.de/blog/?feed=rss2" blog)
+        ("http://www.frumble.de/blog/feed/" blog)
+        ("http://www.plomlompom.de/PlomRogue/plomwiki.php?action=Blog_Atom" blog)
+        ("http://www.whvrt.de/rss" pictures)
+        ("http://www.windytan.com/feeds/posts/default" blog)
+        ("https://echtsuppe.wordpress.com/feed/" blog defunct)
+        ("https://mgsloan.com/feed.xml" blog)
+        ("https://notes.sterni.lv/atom.xml" me)
+        ("http://arduina.net/feed/" defunct blog)
+        ("https://anchor.fm/s/94bb000/podcast/rss" podcast)))
+        ;; http://www.wollenzin.de/feed/ ;_;
+
+(provide 'subscriptions)