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Let’s Write a Tree-Sitter Major Mode Creating a standard programming major mode presents significant challenges, with the intricate tasks of establishing proper indentation and font highlighting being among the two hardest things to get right. It's painstaking work, and it'll quickly descend into a brawl between the font lock engine and your desire for correctness. Tree-sitter makes writing many m
How to Get Started with Tree-Sitter Emacs 29 introduces tree-sitter support, a powerful parsing library that enhances its understanding of source code. With this integration, Emacs gains features like precise syntax highlighting, accurate indentation and easier extensibility. Here's how you install and configure Emacs with tree-sitter support. I think it’s time to talk about how you can start usin
Combobulate: Structured Movement and Editing with Tree-Sitter Combobulate is a package that adds advanced structured editing and movement to many programming modes in Emacs. Here's how it works, and how it can enrich your editing experience in Emacs. About a year ago I released an alpha – prototype, really – version of a tool I call Combobulate. I’d been using it personally for a while before I le
Keyboard Shortcuts every Command Line Hacker should know about GNU Readline Most command line programs that offer line editing – like bash, Python, GDB, psql, sqlite and more – do so using GNU readline. Readline's a powerful library that grants history, completion, movement and editing to programs that use it — and a stable and consistent set of keyboard shortcuts. Shame, then, that even serious c
Emacs’s Builtin Elisp Cheat Sheet Emacs now has a builtin cheat sheet for a large swathe of common elisp functions. If you can't remember exactly how to do something, then this is a great place to look for it first. Learning Emacs lisp is as much about taming the language as it is the ecosystem of functions and variables that you need to get the job done. The lack of namespaces (notwithstanding sh
Mastering Emacs is now available in Japanese Thanks to the hard work of USAMI Kenta and AYANOKOJI Takesi you can now read Mastering Emacs in Japanese! If you’re a Japanese speaker, you can now read my book, Mastering Emacs, in Japanese. I owe all this hard work to AYANOKOJI Takesi and USAMI Kenta, two legendary Emacs hackers and writers in the Japanese Emacs community. There’s a large Emacs commun
What’s New in Emacs 28.1? Learn what's new in Emacs 28.1 It’s that time again: there’s a new major version of Emacs and, with it, a treasure trove of new features and changes. Notable features include the formal inclusion of native compilation, a technique that will greatly speed up your Emacs experience. A critical issue surrounding the use of ligatures also fixed; without it, you couldn’t use li
Tree Sitter and the Complications of Parsing Languages I talk about tree sitter, CEDET, and Combobulate – my "paredit-style" package that's designed to work with most programming languages. You might be surprised to hear when you visit a file in Emacs that the syntax highlighting you are shown on your screen is – most likely – a potpourri of regular expressions with a dash of functions and syntax
What’s New in Emacs 25.1 I talk about the latest version of Emacs 25 and what new features and changes it brings. After a long wait Emacs 25 is finally here! It’s tradition that I take the NEWS file and talk about some of the features I find most exciting. So, no more hesitation – on with the news! Installation Changes in Emacs 25.1Building Emacs now requires C99 or later. Building Emacs now requi
This page holds all the tips, tutorials, and articles I have ever written on Emacs. The page is automatically updated when I add new articles, so feel free to bookmark it to return to it at a later date. Combobulate: Interactive Node Editing with Tree-Sitter Editing code using a concrete syntax tree may seem straightforward, but it's a complex task fraught with challenges. For every command that m
Learn Emacs from the ground up. In the Mastering Emacs book you will learn all the concepts that take weeks, months or even years to truly learn. All in one place. “Emacs is too hard to learn!” It's a common refrain, but Emacs is the product of 40 years of continuous effort to build an extensible, self-documenting text editor. With that, comes complexity; but also freedoms that no other IDE or edi
What’s New In Emacs 24.4 Discover what's new in Emacs 24.4 as I annotate most of the changes made to the new Emacs version. Well, it’s that time of the year again. There’s a new Emacs minor release due out any day now, and it’s become something of a tradition for me to annotate the NEWS file. Of course, “minor” is a relative term here: this release is full of tweaks and changes and is anything but
discover.el: discover more of Emacs using context menus Learn how to discover more of Emacs by using this popup system that unintrusively explains how to use various hidden corners of Emacs such as the registers, isearch and Dired. On DiscoverabilityOver the years I have written tens of thousands of words encouraging Emacs users of all skill levels to learn more about Emacs: either adopting work f
An introduction to Magit, an Emacs mode for Git Learn how to use Magit, an essential tool for any git-loving Emacs user. Magit supercharges your git workflow by removing the tedium of writing arcane commands and replacing them with a simple and ergonomic user interface. Magit is the sweetener that masks the bitter taste you get when you have to commune through algebraic brevity with git. Magit – u
I would recommend using M-x customize-option RET variable-name-here to customize them unless you are comfortabe editing Emacs lisp directly. I don’t ignore anything in Ido beyond the defaults, as I prefer to use the more general completion-ignored-extensions as it works with and without Ido. To make Ido use completion-ignored-extensions you need to enable it if it is not enabled in your Emacs alre
What’s New in Emacs 24.3 What's New in Emacs 24.3. I annotate the NEWS file and explain some of the changes made. Emacs version 24.3 is now released to the public. This release, unlike 24.2, is chock full of goodies. I’ve taken the liberty of annotating things that’re relevant to me – and hopefully you, too, dear reader – but I’ve limited my commentary to things I’m familiar with. Always keen to h
What’s New in Emacs 24 (part 2) Part two of my annotated NEWS file for Emacs 24 This is part two of my What’s New in Emacs 24 series. Part one. Trash changes`delete-by-moving-to-trash’ now only affects commands that specify trashing. This avoids inadvertently trashing temporary files. An important change as some features like flymake create new temporary files every time it runs an external make o
What’s New In Emacs 24 (part 1) Part one of my annotated NEWS file for Emacs 24 With Emacs 24 looming around the corner I figured it was time I took a close look at all the new features and changes. As it’s not officially out yet I will settle for the pretest build (get it here.) With that said, there’s little difference (in my experience anyway) between the pretest versions of Emacs and the real
Mastering Key Bindings in Emacs Creating or altering key bindings in Emacs is an elusive task for new Emacs users, as you're forced to write elisp. Learn how to create key bindings from scratch, or simply use some of my ready-made templates to get you started. Altering the key bindings in Emacs should not, on the face of it, be a difficult task. But there’s a reason why the Emacs manual has dedica
Combobulate: Interactive Node Editing with Tree-Sitter Editing code using a concrete syntax tree may seem straightforward, but it's a complex task fraught with challenges. For every command that modifies the code, there's ample room for ambiguity. What if there are multiple legal choices available? How do you create a user experience in Emacs that not only displays the intended changes but also ca
Mastering Eshell Emacs has a shell written entirely in Emacs Lisp. Here's how you master Eshell, a versatile and powerful shell capable of supplanting bash or zsh as your daily driver. You can run Run Shells and Terminal Emulators in Emacs, but none can match the versatility and integration with Emacs like Eshell. Eshell is a shell written entirely in Emacs Lisp, and it replicates most of the feat
Running Shells and Terminal Emulators in Emacs One of Emacs's strongest capabilities is its ability to talk to external shells, like bash, or emulate an entire terminal. But this being Emacs, you have more than one choice to choose from − and which choice is right for you? To use Emacs effectively, you must learn to use all that Emacs has to offer. One of Emacs’s strongest selling-points is its sh
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