If you ever used ielm, or other comint-mode derivatives, you will notice that the text you input is not highlighted according to the major-mode. If I type (setq foo bar) into ielm, the setq won't be highlighted. Why is this? And how do we c…
Buttercup is a testing framework for emacs-lisp. It is used by large projects like Clojure's CIDER to write clean, concise, and descriptive tests. I introduce Buttercup and build up to advanced usages with the faint, unlikely dream that som…
This reddit post posed a fun challenge: display for(auto&& foo : bar){...} with mathematical notation. In python this is trivial with prettify-symbols-mode as its syntax is simply for foo in bar:. Turns out is possible… whether it is a good…
Variable assignments in Emacs lisp are not highlighted. That is, (setq foo bar) will not apply font-lock-variable-name-face to foo. This case is easy enough to implement via regex. But in Emacs lisp, assignment is variadic, accepting altern…
In Part 1 I addressed: syntax tables, indentation, font locking, and context-sensitive syntax. We now build out a "Hyde" with: shell/async process integration, Eldoc support, and Autocompletion. Also "shift-K" documentation lookup for the s…
Ligatures are single-character replacements of strings. Examples of ligatures: replacing "alpha" with the alpha symbol and "!=" with the a slashed equal sign. See Coding with Mathematical Notation for details and pictures. There is a seriou…
I've taken up maintaining hy-mode - a major mode for lispy python. I narrate working through specific problems in auto-completion, indentation, shell integration, and so on. This post touches on: syntax, indentation, font-locking, and conte…
Roughly, Hy is to Python as Clojure is to Java. Hy completely inter-ops with Python. I've hit commit 1,500 in my Hy project at work. I wanted to share my experience working with Hy, where I feel it shines and where it falls short. Hy is a l…
Spacemacs is referred for its evil integration, space-based bindings, and community contributed layers that collect, configure, and integrate groups of packages. For how much they add to Emacs, motivations for personal layers are largely un…
We improve upon the outline bullets presented in the previous post Managing code with Outlines. Allows for face application to the bullet. The default faces outline-1/2/3... only apply to the text, not the bullet. Adds spaces for higher lev…
I consider outlines an under-utilized yet killer feature of Emacs. This post is split into two parts: Introducing and customizing outline-mode and outshine-mode. [My package outline-ivy for jumping to outlines. Outline-mode is a general fra…
A comparison of how I see my commit logs and how they truly are: Typically this would be accomplished with Emacs font-lock-mode. However Magit is magic, even trivial uses of font-lock-add-keywords will break fontification for the entire buf…