setup-lspmode-gopls-ubuntu1804.sh

setup-lspmode-gopls-ubuntu1804.sh

sudo apt-get install -y emacs25-nox git
wget https://dl.google.com/go/go1.14.1.linux-amd64.tar.gz
sudo tar -xf go1.14.1.linux-amd64.tar.gz -C /opt/

export PATH=/opt/go/bin:$HOME/go/bin:$PATH

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

git clone https://github.com/psanford/wormhole-william

# fix elpa gpg (broken on default 18.04)
mkdir -p ~/.emacs.d/elpa/gnupg/
gpg --homedir ~/.emacs.d/elpa/gnupg --receive-keys 066DAFCB81E42C40

cat >> ~/.emacs.d/init.el <<EOF
;; enable melpa if it isn't enabled
(require 'package)
(when (not (assoc "melpa" package-archives))
  (setq package-archives (append '(("melpa" . "https://melpa.org/packages/")) package-archives)))
(package-initialize)

;; refresh package list if it is not already available
(when (not package-archive-contents) (package-refresh-contents))

;; install use-package if it isn't already installed
(when (not (package-installed-p 'use-package))
  (package-install 'use-package))


(use-package lsp-mode
  :ensure t
  :custom (
           ;; suppress warning about not having yasnippet mode installed
           (lsp-enable-snippet nil)
           ;; uncomment to enable gopls http debug server
           ;; (lsp-gopls-server-args '("-debug" "127.0.0.1:0"))
           )
  :commands (lsp lsp-deferred)
  )

(use-package company
  :ensure t
  :config (progn
            ;; don't add any dely before trying to complete thing being typed
            ;; the call/response to gopls is asynchronous so this should have little
            ;; to no affect on edit latency
            (setq company-idle-delay 0)
            ;; start completing after a single character instead of 3
            (setq company-minimum-prefix-length 1)
            ;; align fields in completions
            (setq company-tooltip-align-annotations t)
            )
  )

;; hookup company to lsp-mode
(use-package company-lsp
  :ensure t
  :commands company-lsp)


(use-package go-mode
  :ensure t
  :hook ((go-mode . lsp-deferred)))
EOF

You can watch this here: https://asciinema.org/a/312582