wtf is .emacs.d?

This is a ready-made configuration file for Emacs, a text editor popular among programmers. Emacs is powerful but notoriously hard to set up from scratch. This project gives you a pre-built starting point so you can skip the tedious configuration process and immediately have a comfortable environment for writing code, especially in the Clojure programming language. Under the hood, the project is organized so that you can easily understand what each setting does. The main file acts as a table of contents, pointing you to other files that handle specific tweaks. The creator has written notes explaining the purpose of nearly every line. The idea is that you don't just install it blindly, you can read through it to learn how the editor works and adjust things to your liking. Someone learning Clojure would get the most use out of this, since that's the primary language it's tuned for. The configuration also includes basic, ready-to-go support for common web languages like CSS, HTML, and JavaScript out of the box. If you need more advanced features for those web languages, the project points you toward a more detailed personal configuration created by another developer. That expanded version handles things like setting JavaScript indentation rules, adding specialized Ruby editing tools, and enabling support for YAML and SCSS files. However, the project notes that if you ever need support for a completely different programming language, a quick search will usually lead you to a simple package you can install to add it.