package.el

;;; packages.el --- scala-metals layer packages file for Spacemacs.
;;
;; Copyright (c) 2012-2017 Sylvain Benner & Contributors
;;
;; Author: James <james@shenzhen.internal.azavea.com>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;;; License: GPLv3

;;; Commentary:

;; See the Spacemacs documentation and FAQs for instructions on how to implement
;; a new layer:
;;
;;   SPC h SPC layers RET
;;
;;
;; Briefly, each package to be installed or configured by this layer should be
;; added to `scala-metals-packages'. Then, for each package PACKAGE:
;;
;; - If PACKAGE is not referenced by any other Spacemacs layer, define a
;;   function `scala-metals/init-PACKAGE' to load and initialize the package.

;; - Otherwise, PACKAGE is already referenced by another Spacemacs layer, so
;;   define the functions `scala-metals/pre-init-PACKAGE' and/or
;;   `scala-metals/post-init-PACKAGE' to customize the package as it is loaded.

;;; Code:

(defconst scala-metals-packages
  '()
  "The list of Lisp packages required by the scala-metals layer.

Each entry is either:

1. A symbol, which is interpreted as a package to be installed, or

2. A list of the form (PACKAGE KEYS...), where PACKAGE is the
    name of the package to be installed or loaded, and KEYS are
    any number of keyword-value-pairs.

    The following keys are accepted:

    - :excluded (t or nil): Prevent the package from being loaded
      if value is non-nil

    - :location: Specify a custom installation location.
      The following values are legal:

      - The symbol `elpa' (default) means PACKAGE will be
        installed using the Emacs package manager.

      - The symbol `local' directs Spacemacs to load the file at
        `./local/PACKAGE/PACKAGE.el'

      - A list beginning with the symbol `recipe' is a melpa
        recipe.  See: https://github.com/milkypostman/melpa#recipe-format")

;; Add melpa to your packages repositories
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)

;; Enable defer and ensure by default for use-package
(setq use-package-always-defer t
      use-package-always-ensure t)

;; Enable scala-mode and sbt-mode
(use-package scala-mode
  :mode "\\.s\\(cala\\|bt\\)$")

(use-package sbt-mode
  :commands sbt-start sbt-command
  :config
  ;; WORKAROUND: https://github.com/ensime/emacs-sbt-mode/issues/31
  ;; allows using SPACE when in the minibuffer
  (substitute-key-definition
   'minibuffer-complete-word
   'self-insert-command
   minibuffer-local-completion-map))

;; Enable nice rendering of diagnostics like compile errors.
(use-package flycheck
  :init (global-flycheck-mode))

(use-package lsp-mode
 :init (setq lsp-prefer-flymake nil))

(use-package lsp-ui
  :hook (lsp-mode . lsp-ui-mode))

(use-package lsp-scala
  :after scala-mode
  :demand t
  ;; Optional - enable lsp-scala automatically in scala files
  :hook (scala-mode . lsp))


;;; packages.el ends here