goimports

Documentation

Overview

Command goimports updates your Go import lines, adding missing ones and removing unreferenced ones.

$ go get code.google.com/p/go.tools/cmd/goimports

It's a drop-in replacement for your editor's gofmt-on-save hook. It has the same command-line interface as gofmt and formats your code in the same way.

For emacs, make sure you have the latest (Go 1.2+) go-mode.el:

https://go.googlecode.com/hg/misc/emacs/go-mode.el

Then in your .emacs file:

(setq gofmt-command "goimports")
(add-to-list 'load-path "/home/you/goroot/misc/emacs/")
(require 'go-mode-load)
(add-hook 'before-save-hook 'gofmt-before-save)

For vim, set "gofmt_command" to "goimports":

https://code.google.com/p/go/source/detail?r=39c724dd7f252
https://code.google.com/p/go/source/browse#hg%2Fmisc%2Fvim
etc

For GoSublime, follow the steps described here:

http://michaelwhatcott.com/gosublime-goimports/

For other editors, you probably know what to do.

Happy hacking!