diff options
Diffstat (limited to 'users/tazjin/emacs/config/functions.el')
| -rw-r--r-- | users/tazjin/emacs/config/functions.el | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/users/tazjin/emacs/config/functions.el b/users/tazjin/emacs/config/functions.el new file mode 100644 index 000000000000..23cb47d02a3b --- /dev/null +++ b/users/tazjin/emacs/config/functions.el @@ -0,0 +1,369 @@ +(require 'chart) +(require 'dash) +(require 'map) + +(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 the NixOS man page +(defun nixos-man () + (interactive) + (man "configuration.nix")) + +;; 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)) + +(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 `run-external-command'.") + +(defun run-external-command--handler (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 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))) + (run-external-command--handler + (completing-read "Command: " external-commands-list + nil ;; predicate + t ;; require-match + nil ;; initial-input + ;; hist + 'external-commands-history)))) + +(defun password-store-lookup (&optional password-store-dir) + "Interactive password-store lookup function that actually uses +the GPG agent correctly." + + (interactive) + + (let* ((entry (completing-read "Copy password of entry: " + (password-store-list (or password-store-dir + (password-store-dir))) + nil ;; predicate + t ;; require-match + )) + (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 browse-repositories () + "Select a git repository and open its associated magit buffer." + + (interactive) + (magit-status + (completing-read "Repository: " (magit-list-repos)))) + +(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>" mc/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)))) + +(setq mc/cmds-to-run-for-all '(kill-region paredit-newline)) + +(setq mc/cmds-to-run-once '(mc/mark-dwim + mc/mark-more-hydra/mc/mmlte--down + mc/mark-more-hydra/mc/mmlte--left + mc/mark-more-hydra/mc/mmlte--right + mc/mark-more-hydra/mc/mmlte--up + mc/mark-more-hydra/mmlte--up + mc/mark-more-hydra/nil)) + +(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" + (s-trim-right 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)))) + +(defun screenshot-select (filename) + "Take a screenshot based on a mouse-selection and save it to + ~/screenshots." + (interactive "sScreenshot filename: ") + (let* ((path (f-join "~/screenshots" + (format "%s-%d.png" + (if (string-empty-p filename) "shot" filename) + (time-convert nil 'integer))))) + (shell-command (format "maim --select %s" path)) + (message "Wrote screenshot to %s" path))) + +(defun graph-unread-mails () + "Create a bar chart of unread mails based on notmuch tags. + Certain tags are excluded from the overview." + + (interactive) + (let ((tag-counts + (-keep (-lambda ((name . search)) + (let ((count + (string-to-number + (s-trim + (notmuch-command-to-string "count" search "and" "tag:unread"))))) + (when (>= count 1) (cons name count)))) + (notmuch-hello-generate-tag-alist '("unread" "signed" "attachment" "important"))))) + + (chart-bar-quickie + (if (< (length tag-counts) 6) + 'vertical 'horizontal) + "Unread emails" + (-map #'car tag-counts) "Tag:" + (-map #'cdr tag-counts) "Count:"))) + +(defun notmuch-show-open-or-close-subthread (&optional prefix) + "Open or close the subthread from (and including) the message at point." + (interactive "P") + (save-excursion + (let ((current-depth (map-elt (notmuch-show-get-message-properties) :depth 0))) + (loop do (notmuch-show-message-visible (notmuch-show-get-message-properties) prefix) + until (or (not (notmuch-show-goto-message-next)) + (= (map-elt (notmuch-show-get-message-properties) :depth) current-depth))))) + (force-window-update)) + +(defun vterm-send-ctrl-x () + "Sends `C-x' to the libvterm." + (interactive) + (vterm-send-key "x" nil nil t)) + +(defun find-depot-project (dir) + "Function used in the `project-find-functions' hook list to + determine the current project root of a depot project." + (when (s-starts-with? "/depot" dir) + (if (f-exists-p (f-join dir "default.nix")) + (cons 'transient dir) + (find-depot-project (f-parent dir))))) + +(add-to-list 'project-find-functions #'find-depot-project) + +(defun find-cargo-project (dir) + "Attempt to find the current project in `project-find-functions' +by looking for a `Cargo.toml' file." + (unless (equal "/" dir) + (if (f-exists-p (f-join dir "Cargo.toml")) + (cons 'transient dir) + (find-cargo-project (f-parent dir))))) + +(add-to-list 'project-find-functions #'find-cargo-project) + +(defun magit-find-file-worktree () + (interactive) + "Find a file in the current (ma)git worktree." + (magit-find-file--internal "{worktree}" + (magit-read-file-from-rev "HEAD" "Find file") + #'pop-to-buffer-same-window)) + +(defun songwhip--handle-result (status &optional cbargs) + ;; TODO(tazjin): Inspect status, which looks different in practice + ;; than the manual claims. + (if-let* ((response (json-parse-string + (buffer-substring url-http-end-of-headers (point-max)))) + (sw-path (ht-get* response "data" "path")) + (link (format "https://songwhip.com/%s" sw-path)) + (select-enable-clipboard t)) + (progn + (kill-new link) + (message "Copied Songwhip link (%s)" link)) + (warn "Something went wrong while retrieving Songwhip link!") + ;; For debug purposes, the buffer is persisted in this case. + (setq songwhip--debug-buffer (current-buffer)))) + +(defun songwhip-lookup-url (url) + "Look up URL on Songwhip and copy the resulting link to the clipboard." + (interactive "sEnter source URL: ") + (let ((songwhip-url "https://songwhip.com/api/") + (url-request-method "POST") + (url-request-extra-headers '(("Content-Type" . "application/json"))) + (url-request-data + (json-serialize `((country . "GB") + (url . ,url))))) + (url-retrieve "https://songwhip.com/api/" #'songwhip--handle-result nil t t) + (message "Requesting Songwhip URL ... please hold the line."))) + +(defun rg-in-project (&optional prefix) + "Interactively call ripgrep in the current project, or fall + back to ripgrep default behaviour if prefix is set." + (interactive "P") + (counsel-rg nil (unless prefix + (if-let ((pr (project-current))) + (project-root pr))))) + +(defun zoxide-open-magit () + "Query Zoxide for paths and open magit in the result." + (interactive) + (zoxide-open-with nil #'magit-status-setup-buffer)) + +(defun toggle-nix-test-and-exp () + "Switch between the .nix and .exp file in a Tvix/Nix test." + (interactive) + (let* ((file (buffer-file-name)) + (other (if (s-suffix? ".nix" file) + (s-replace-regexp ".nix$" ".exp" file) + (if (s-suffix? ".exp" file) + (s-replace-regexp ".exp$" ".nix" file) + (error "Not a .nix/.exp file!"))))) + (find-file other))) + +(provide 'functions) |