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Diffstat (limited to 'configs/shared/.emacs.d/wpc/prelude.el')
-rw-r--r-- | configs/shared/.emacs.d/wpc/prelude.el | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/configs/shared/.emacs.d/wpc/prelude.el b/configs/shared/.emacs.d/wpc/prelude.el new file mode 100644 index 000000000000..fb459627899d --- /dev/null +++ b/configs/shared/.emacs.d/wpc/prelude.el @@ -0,0 +1,122 @@ +;;; prelude.el --- My attempt at augmenting Elisp stdlib -*- lexical-binding: t -*- +;; Author: William Carroll <wpcarro@gmail.com> + +;;; Commentary: +;; Some of these ideas are scattered across other modules like `fs', +;; `string-functions', etc. I'd like to keep everything modular. I still don't +;; have an answer for which items belond in `misc'; I don't want that to become +;; a dumping grounds. Ideally this file will `require' all other modules and +;; define just a handful of functions. + +;; TODO: Consider removing all dependencies from prelude.el. + +;;; Code: + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Third-party libraries +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(require 's) +(require 'dash) +(require 'f) + + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Libraries +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +;; TODO: Maybe don't globally import everything here. Disable these and attepmt +;; to reload Emacs to assess damage. +(require 'string) +(require 'list) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Utilities +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(defun prelude/to-string (x) + "Convert X to a string." + (format "%s" x)) + +(defun prelude/inspect (&rest args) + "Message `ARGS' where ARGS are any type." + (->> args + (list/map #'prelude/to-string) + (apply #'string/concat) + message)) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Assertions +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +;; TODO: Should I `throw' instead of `error' here? +(defmacro prelude/assert (x) + "Errors unless X is t. +These are strict assertions and purposely do not rely on truthiness." + (let ((as-string (prelude/to-string x))) + `(unless (equal t ,x) + (error (string/concat "Assertion failed: " ,as-string))))) + +(defmacro prelude/refute (x) + "Errors unless X is nil." + (let ((as-string (prelude/to-string x))) + `(unless (equal nil ,x) + (error (string/concat "Refutation failed: " ,as-string))))) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Adapter functions +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(defun prelude/identity (x) + "Return X unchanged." + x) + +(defun prelude/const (x) + "Return a variadic lambda that will return X." + (lambda (&rest _) x)) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Miscellaneous +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +;; TODO: Consider packaging these into a linum-color.el package. +;; TODO: Generate the color used here from the theme. +(defvar linum/safe? nil + "Flag indicating whether or not it is safe to work with `linum-mode'.") + +(defvar linum/mru-color nil + "Stores the color most recently attempted to be applied.") + +(add-hook 'linum-mode-hook + (lambda () + (setq linum/safe? t) + (when (maybe/some? linum/mru-color) + (set-face-foreground 'linum linum/mru-color)))) + +(defun prelude/set-line-number-color (color) + "Safely set linum color to `COLOR'. + +If this is called before Emacs initializes, the color will be stored in +`linum/mru-color' and applied once initialization completes. + +Why is this safe? +If `(set-face-foreground 'linum)' is called before initialization completes, +Emacs will silently fail. Without this function, it is easy to introduce +difficult to troubleshoot bugs in your init files." + (if linum/safe? + (set-face-foreground 'linum color) + (setq linum/mru-color color))) + +(defun prelude/prompt (prompt) + "Read input from user with PROMPT." + (read-string prompt)) + +(defun prelude/executable-exists? (name) + "Return t if CLI tool NAME exists according to `exec-path'." + (let ((file (locate-file name exec-path))) + (if (maybe/some? file) + (f-exists? file) + nil))) + +(provide 'prelude) +;;; prelude.el ends here |