This repository contains Emacs modes for Groovy and Grails. The major features are syntax highlighting with groovy-mode, REPL integration with run-groovy and Grails project navigation with grails-mode.

Emacs 24+ is required.

These packages are available on MELPA. To use rolling releases:

(require 'package)
(add-to-list 'package-archives
             '("melpa" . "https://melpa.org/packages/") t)
(package-initialize)

Alternatively, if you just want stable releases:

(require 'package)
(add-to-list 'package-archives
             '("melpa-stable" . "https://stable.melpa.org/packages/") t)
(package-initialize)

You can now use M-x list-packages to find groovy-mode and install it.

This mode was originally developed as a derived mode of java-mode (a derived mode of cc-mode) inspired by Dylan R.E. Moonfire's C# mode. There are however what seem to be insurmountable obstacles to making groovy-mode based on CC Mode work as people want. Wilfred Hughes created a new groovy-mode (standalone) independent of CC Mode.

The CC Mode version of groovy-mode used to be master, and is the basis for the 1.0.1 version on MELPA. The work on standlone groovy-mode happened on a feature branch. As of 2017-05-08T08:00+01:00, the CC Mode version has been switched to the 1.X branch and the standalone version is now master and will be released as 2.0.0 as soon as viable.

The CC Mode version of groovy-mode is configured by overriding cc-mode settings, such as c-basic-offset.

The new, and now default, standalone mode provides more robust highlighting and indentation, plus niceties like string interpolation highlighting, compared to the CC Mode based version..

You can configure the standalone groovy-mode with M-x customize, and searching for groovy.