Emacs and Go » History » Revision 3
Revision 2 (Peter Amstutz, 02/21/2018 03:19 PM) → Revision 3/4 (Peter Amstutz, 02/21/2018 03:21 PM)
h1. Emacs and Go
With this stuff in ~/.emacs, you should get the following features:
* (not really a feature) a strange delay the first time you open a Go file, while a bunch of dev tools get installed into GOPATH
* With point on an identifier, @M-.@ jumps to the identifier's definition (@M-*@ returns to original point)
* Gofmt and goimports get applied automatically when saving
* Requires "gocode":https://github.com/nsf/gocode "goimports":https://godoc.org/golang.org/x/tools/cmd/goimports and "godef":https://godoc.org/github.com/rogpeppe/godef
<pre><code class="lisp">
(setq-default indent-tabs-mode nil)
(require 'package)
(add-to-list 'package-archives
'("melpa" . "https://melpa.org/packages/"))
(add-to-list 'package-archives
'("melpa-stable" . "https://stable.melpa.org/packages/") t)
(when (< emacs-major-version 24)
;; compatibility libraries like cl-lib
(add-to-list 'package-archives '("gnu" . "http://elpa.gnu.org/packages/")))
(add-to-list 'package-archives
'("melpa" . "http://melpa.milkbox.net/packages/") t)
(package-initialize)
(define-key global-map (kbd "RET") 'newline-and-indent)
(setq package-list '(async auto-complete dash
go-add-tags go-autocomplete go-errcheck go-mode go-playground
go-rename gotest markdown-mode
yaml-mode))
(dolist (package package-list)
(unless (package-installed-p package)
(message "installing %s..." package)
(package-install package)))
(defun arvados-gopath ()
(let ((bfn (buffer-file-name)))
(setenv "GOPATH"
(with-temp-buffer
(call-process "bash" nil t nil "-c"
"gp=${GOPATH:-${HOME}/go}; d=${0}; while [[ ${d} != '' ]]; do if [[ -e ${d}/services/keep-web/. ]]; then gp=${d}/tmp/GOPATH; mkdir -p ${gp}/src/git.curoverse.com; ln -sfn ${d} ${gp}/src/git.curoverse.com/arvados.git; break; fi; d=${d%/*}; done; mkdir -p ${gp}; echo -n ${gp}"
bfn)
(buffer-substring (point-min) (point-max))))))
(defun go-mode-omnibus ()
(let ((gopath (arvados-gopath)))
(make-local-variable 'process-environment)
(make-local-variable 'exec-path)
(add-to-list 'exec-path (concat gopath "/bin"))
(with-temp-buffer
(call-process "bash" nil t t "-c" "([[ -x ${1}/bin/gocode ]] && ${1}/bin/goimports -srcdir / /dev/null) || go get -u -v golang.org/x/tools/cmd/... github.com/rogpeppe/godef github.com/nsf/gocode" "-" gopath))
(auto-complete-mode 1)
; call gofmt before saving
(add-hook 'before-save-hook 'gofmt-before-save)
(setq gofmt-command "goimports")
; compile with go
(if (not (string-match "go" compile-command))
(set (make-local-variable 'compile-command)
"go build -v && go test -v && go vet"))
; godef-jump key bindings
(local-set-key (kbd "M-.") 'godef-jump)
(local-set-key (kbd "M-*") 'pop-tag-mark)))
(add-hook 'go-mode-hook 'go-mode-omnibus)
</code></pre>