polarvisa.blogg.se - Open emacs in terminal mac for ruby file

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Unfortunately, Emacs doesn’t come with a built-in “manifest”-driven solution for defining what packages to use (like we might encounter with a Gemfile or package.json in a Ruby or Node project).įortunately it’s pretty easy to add this functionality, so go ahead and add this Elisp to your init.el: There are several free online package repositories out there, the most popular being GNU ELPA, ELPA, Marmalade, and Melpa. This will also give us a good opportunity to talk about… Emacs PackagesĪ “package” is the standard unit for distributing a chunk of Emacs code. Let’s start by pulling BetterDefaults into our new config. BetterDefaults is a popular Emacs package for improving this situation without getting too overboard with magical customizations. The default Emacs configuration includes some clunky things like menu bars and a loud “splash” screen.

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While there’s a certain endearing homeliness to it, the first impression of a fresh Emacs install is fairly dated: When Emacs boots, it will process our init.el as Emacs Lisp, so within this file we’ll be writing Elisp expressions to customize how the editor behaves.

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So are you saying we’ll be writing… Lisp? You bet your Free Software Foundation commemorative mousepad we are! It turns out Emacs is really a big old Lisp interpreter that happens to have some neat features for manipulating text buffers tucked away in the corners. This stands for Emacs Lisp, the language in which Emacs is written and scripted. Baby’s First Emacs LispĪn astute reader will have noticed the extension of the init file we just created. Your original config will be waiting for you should you decide to return to it. To follow along, go ahead and create this directory and file:

(This is similar to how your shell loads any user configuration files at ~/.profile or ~/.bashrc, etc) When Emacs starts up, it will by default look for a file called init.el in this directory and use that to load any user-specific configuration you want to provide. The Emacs configuration journey starts with a special directory on your machine located at ~/.emacs.d.

Running Ruby tests from within emacs using ruby-test-modeįor now I won’t be digging into any Rails-specific features – hopefully I can cover this in another post, but this guide is focused on plain old Ruby.

Running a Ruby REPL from within emacs using inf-ruby-mode.

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Interactively evaluating code in Ruby buffers using Seeing Is Believing.

Setting up basic Ruby syntax highlighting and syntax completion.

Modernizing the Emacs UI using some sane defaults.

In this post I’ll try to document some of the tools and configuration I’ve found useful, with an aim toward keeping things accessible for a newcomer to Emacs. Along the way I’ve been thinking about what is needed for a minimal but sufficient Emacs setup for working with Ruby code. Lately I’ve been gradually drawing a few students at Turing into the Emacs fold.