Go

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software¹

Setup

Install golang¹ on your system, and configure your environment prior to loading this module.

RUN apt install -y golang

Language server

Get started by installing the gopls² language server.

GO111MODULE=on go get golang.org/x/tools/gopls@latest

Setup the environment

Make some modifications to the environment. Set the $GOPATH variable prior to loading, allowing modification of the default value. Include the bin subdirectory of the $GOPATH in the $PATH variable, adding compiled golang applications to the system path.

(setenv "GOPATH" (concat (getenv "HOME") "/.go/"))
(setenv "PATH" (concat (getenv "GOPATH") "bin:" (getenv "PATH")))

Config

Use the go-mode³ package for integration with lsp-mode, manually setting the path to gopls² before loading.

(use-package go-mode
  :hook (go-mode . lsp)
  :custom (lsp-go-gopls-server-path "~/.go/bin/gopls"))

Before save hooks

Apply some custom behaviour when saving golang¹ buffers. Format and organize the imports before saving.

(defun dotfiles/go-hook ()
  (add-hook 'before-save-hook #'lsp-format-buffer t t)
  (add-hook 'before-save-hook #'lsp-organize-imports t t))

(add-hook 'go-mode-hook #'dotfiles/go-hook)

Babel structure templates

Configure the babel engine to support golang¹ source blocks.

(add-to-list 'org-structure-template-alist '("go" . "src go"))

Footnotes

https://golang.org

https://pkg.go.dev/golang.org/x/tools/gopls

https://emacswiki.org/emacs/GoMode

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Go