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Diffstat (limited to 'tools/emacs/config/functions.el')
| -rw-r--r-- | tools/emacs/config/functions.el | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/tools/emacs/config/functions.el b/tools/emacs/config/functions.el new file mode 100644 index 000000000000..193e1a7412d1 --- /dev/null +++ b/tools/emacs/config/functions.el @@ -0,0 +1,250 @@ +(defun load-file-if-exists (filename) + (if (file-exists-p filename) + (load filename))) + +(defun goto-line-with-feedback () + "Show line numbers temporarily, while prompting for the line number input" + (interactive) + (unwind-protect + (progn + (setq-local display-line-numbers t) + (let ((target (read-number "Goto line: "))) + (avy-push-mark) + (goto-line target))) + (setq-local display-line-numbers nil))) + +;; These come from the emacs starter kit + +(defun esk-add-watchwords () + (font-lock-add-keywords + nil '(("\\<\\(FIX\\(ME\\)?\\|TODO\\|DEBUG\\|HACK\\|REFACTOR\\|NOCOMMIT\\)" + 1 font-lock-warning-face t)))) + +(defun esk-sudo-edit (&optional arg) + (interactive "p") + (if (or arg (not buffer-file-name)) + (find-file (concat "/sudo:root@localhost:" (read-file-name "File: "))) + (find-alternate-file (concat "/sudo:root@localhost:" buffer-file-name)))) + +;; Open Fefes blog +(defun fefes-blog () + (interactive) + (eww "https://blog.fefe.de/")) + +;; Open the NixOS man page +(defun nixos-man () + (interactive) + (man "configuration.nix")) + +;; Open my monorepo in magit +(defun depot-status () + (interactive) + (magit-status "~/depot")) + +;; Get the nix store path for a given derivation. +;; If the derivation has not been built before, this will trigger a build. +(defun nix-store-path (derivation) + (let ((expr (concat "with import <nixos> {}; " derivation))) + (s-chomp (shell-command-to-string (concat "nix-build -E '" expr "'"))))) + +(defun insert-nix-store-path () + (interactive) + (let ((derivation (read-string "Derivation name (in <nixos>): "))) + (insert (nix-store-path derivation)))) + +(defun toggle-force-newline () + "Buffer-local toggle for enforcing final newline on save." + (interactive) + (setq-local require-final-newline (not require-final-newline)) + (message "require-final-newline in buffer %s is now %s" + (buffer-name) + require-final-newline)) + +;; Helm includes a command to run external applications, which does +;; not seem to exist in ivy. This implementation uses some of the +;; logic from Helm to provide similar functionality using ivy. +(defun list-external-commands () + "Creates a list of all external commands available on $PATH + while filtering NixOS wrappers." + (cl-loop + for dir in (split-string (getenv "PATH") path-separator) + when (and (file-exists-p dir) (file-accessible-directory-p dir)) + for lsdir = (cl-loop for i in (directory-files dir t) + for bn = (file-name-nondirectory i) + when (and (not (s-contains? "-wrapped" i)) + (not (member bn completions)) + (not (file-directory-p i)) + (file-executable-p i)) + collect bn) + append lsdir into completions + finally return (sort completions 'string-lessp))) + +(defvar external-command-flag-overrides + '(("google-chrome" . "--force-device-scale-factor=1.4")) + + "This setting lets me add additional flags to specific commands + that are run interactively via `ivy-run-external-command'.") + +(defun run-external-command (cmd) + "Execute the specified command and notify the user when it + finishes." + (let* ((extra-flags (cdr (assoc cmd external-command-flag-overrides))) + (cmd (if extra-flags (s-join " " (list cmd extra-flags)) cmd))) + (message "Starting %s..." cmd) + (set-process-sentinel + (start-process-shell-command cmd nil cmd) + (lambda (process event) + (when (string= event "finished\n") + (message "%s process finished." process)))))) + +(defun ivy-run-external-command () + "Prompts the user with a list of all installed applications and + lets them select one to launch." + + (interactive) + (let ((external-commands-list (list-external-commands))) + (ivy-read "Command:" external-commands-list + :require-match t + :history 'external-commands-history + :action #'run-external-command))) + +(defun ivy-password-store (&optional password-store-dir) + "Custom version of password-store integration with ivy that + actually uses the GPG agent correctly." + + (interactive) + (ivy-read "Copy password of entry: " + (password-store-list (or password-store-dir (password-store-dir))) + :require-match t + :keymap ivy-pass-map + :action (lambda (entry) + (let ((password (auth-source-pass-get 'secret entry))) + (password-store-clear) + (kill-new password) + (setq password-store-kill-ring-pointer kill-ring-yank-pointer) + (message "Copied %s to the kill ring. Will clear in %s seconds." + entry (password-store-timeout)) + (setq password-store-timeout-timer + (run-at-time (password-store-timeout) + nil 'password-store-clear)))))) + +(defun ivy-browse-repositories () + "Select a git repository and open its associated magit buffer." + + (interactive) + (ivy-read "Repository: " + (magit-list-repos) + :require-match t + :sort t + :action #'magit-status)) + +(defun warmup-gpg-agent (arg &optional exit) + "Function used to warm up the GPG agent before use. This is + useful in cases where there is no easy way to make pinentry run + in the correct context (such as when sending email)." + (interactive) + (message "Warming up GPG agent") + (epg-sign-string (epg-make-context) "dummy") + nil) + +(defun bottom-right-window-p () + "Determines whether the last (i.e. bottom-right) window of the + active frame is showing the buffer in which this function is + executed." + (let* ((frame (selected-frame)) + (right-windows (window-at-side-list frame 'right)) + (bottom-windows (window-at-side-list frame 'bottom)) + (last-window (car (seq-intersection right-windows bottom-windows)))) + (eq (current-buffer) (window-buffer last-window)))) + +(defhydra mc/mark-more-hydra (:color pink) + ("<up>" mmlte--up "Mark previous like this") + ("<down>" mc/mmlte--down "Mark next like this") + ("<left>" mc/mmlte--left (if (eq mc/mark-more-like-this-extended-direction 'up) + "Skip past the cursor furthest up" + "Remove the cursor furthest down")) + ("<right>" mc/mmlte--right (if (eq mc/mark-more-like-this-extended-direction 'up) + "Remove the cursor furthest up" + "Skip past the cursor furthest down")) + ("f" nil "Finish selecting")) + +;; Mute the message that mc/mmlte wants to print on its own +(advice-add 'mc/mmlte--message :around (lambda (&rest args) (ignore))) + +(defun mc/mark-dwim (arg) + "Select multiple things, but do what I mean." + + (interactive "p") + (if (not (region-active-p)) (mc/mark-next-lines arg) + (if (< 1 (count-lines (region-beginning) + (region-end))) + (mc/edit-lines arg) + ;; The following is almost identical to `mc/mark-more-like-this-extended', + ;; but uses a hydra (`mc/mark-more-hydra') instead of a transient key map. + (mc/mmlte--down) + (mc/mark-more-hydra/body)))) + +(defun memespace-region () + "Make a meme out of it." + + (interactive) + (let* ((start (region-beginning)) + (end (region-end)) + (memed + (message + (s-trim-right + (apply #'string + (-flatten + (nreverse + (-reduce-from (lambda (acc x) + (cons (cons x (-repeat (+ 1 (length acc)) 32)) acc)) + '() + (string-to-list (buffer-substring-no-properties start end)))))))))) + + (save-excursion (delete-region start end) + (goto-char start) + (insert memed)))) + +(defun insert-todo-comment (prefix todo) + "Insert a comment at point with something for me to do." + + (interactive "P\nsWhat needs doing? ") + (save-excursion + (move-end-of-line nil) + (insert (format " %s TODO(%s): %s" + comment-start + (if prefix (read-string "Who needs to do this? ") + (getenv "USER")) + todo)))) + +;; Custom text scale adjustment functions that operate on the entire instance +(defun modify-text-scale (factor) + (set-face-attribute 'default nil + :height (+ (* factor 5) (face-attribute 'default :height)))) + +(defun increase-default-text-scale (prefix) + "Increase default text scale in all Emacs frames, or just the + current frame if PREFIX is set." + + (interactive "P") + (if prefix (text-scale-increase 1) + (modify-text-scale 1))) + +(defun decrease-default-text-scale (prefix) + "Increase default text scale in all Emacs frames, or just the + current frame if PREFIX is set." + + (interactive "P") + (if prefix (text-scale-decrease 1) + (modify-text-scale -1))) + +(defun set-default-text-scale (prefix &optional to) + "Set the default text scale to the specified value, or the + default. Restores current frame's text scale only, if PREFIX is + set." + + (interactive "P") + (if prefix (text-scale-adjust 0) + (set-face-attribute 'default nil :height (or to 120)))) + +(provide 'functions) |