ido-completing-read-plus

ido-ubiquitous

Gimme some ido... everywhere! This package replaces stock emacs completion with ido completion wherever it is possible to do so without breaking things.

Get it from MELPA: http://melpa.org/#/ido-ubiquitous

Version 3.0 changes

ido-ubiquitous version 3.0 is a major update, including a split into two packages, and some of the configuration options have changed in non-backwards-compatible ways. If you have customized ido-ubiquitous, be sure to check out M-x customize-group ido-ubiquitous and M-x customize-group ido-completing-read+ after updating to 3.0 and make sure the new settings are to your liking.

How to enable ido in as many places as possible

If you are using this package, you probably want to enable ido everywhere that it is possible to do so. Here are all the places to enable ido that I'm aware of. (Note that most of these variables can also be set via M-x customize-variable if you prefer that.)

Ido itself

First, enable ido-mode and ido-everywhere.

(ido-mode 1)
(ido-everywhere 1)

ido-ubiquitous (this package)

Install this package and then turn on ido-ubiquitous-mode:

(require 'ido-ubiquitous)
(ido-ubiquitous-mode 1)

Smex

Smex allows you to use ido for completion of commands in M-x, with enhancements like putting your most-used commands at the front of the list. First install the smex package, then follow the directions to set up key-bindings for it.

Packages with their own completion customizations

Finally, some packages implement their own completion customizations, and ido-ubiquitous avoids interfering with these, so you need to enable them separately.

• Org Mode: (setq org-completion-use-ido t)
• Magit: (setq magit-completing-read-function 'magit-ido-completing-read)
• Gnus: (setq gnus-completing-read-function 'gnus-ido-completing-read)