Tricking Out Emacs for Go

.emacs

;; from https://www.youtube.com/watch?v=r6j2W5DZRtA
;; get the following packages ("M-x package-list-packages"):
;;     go-mode
;;     go-eldoc
;;     company-mode
;;     company-go
;; get the following go programs (run each line in your shell):
;;     go get golang.org/x/tools/cmd/godoc
;;     go get golang.org/x/tools/cmd/goimports
;;     go get github.com/rogpeppe/godef
;;     go get github.com/nsf/gocode

(require 'package)
(add-to-list 'package-archives
         '("melpa" . "http://melpa.milkbox.net/packages/") t)

(setq company-idle-delay nil)

(setq gofmt-command "goimports")
;; UPDATE: gofmt-before-save is more convenient then having a command
;; for running gofmt manually. In practice, you want to
;; gofmt/goimports every time you save anyways.
(add-hook 'before-save-hook 'gofmt-before-save)

(global-set-key (kbd "C-c M-n") 'company-complete)
(global-set-key (kbd "C-c C-n") 'company-complete)

(defun my-go-mode-hook ()
  ;; UPDATE: I commented the next line out because it isn't needed
  ;; with the gofmt-before-save hook above.
  ;; (local-set-key (kbd "C-c m") 'gofmt)
  (local-set-key (kbd "M-.") 'godef-jump))
  (set (make-local-variable 'company-backends) '(company-go)))

(add-hook 'go-mode-hook 'my-go-mode-hook)
(add-hook 'go-mode-hook 'go-eldoc-setup)
(add-hook 'go-mode-hook 'company-mode)