Work-Env/.emacs.d/configs/scala.el

;; --- Scala configuration file ---
;; Includes:
;; * Inferred types
;; * Auto-complete
;; * Syntax highlighting
;; * Jump to source/docs
;; * Refactoring
;; * Error detection

;; Requires:

(require 'package-loader)

;; Enable scala-mode for highlighting, indentation and motion commands
(use-package scala-mode
  :mode "\\.s\\(cala\\|bt\\)$")

;; Enable sbt mode for executing sbt commands
(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)
  ;; sbt-supershell kills sbt-mode:
  ;; https://github.com/hvesalai/emacs-sbt-mode/issues/152
  (setq sbt:program-options '("-Dsbt.supershell=false"))
  )

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

(use-package lsp-mode
  ;; Optional - enable lsp-mode automatically in scala files
  :hook  (scala-mode . lsp)
  (lsp-mode . lsp-lens-mode)
  :config (setq lsp-prefer-flymake nil))

;; Add metals backend for lsp-mode
(use-package lsp-metals)

;; Enable nice rendering of documentation on hover
(use-package lsp-ui)

;; lsp-mode supports snippets, but in order for them to work you need to use yasnippet
;; If you don't want to use snippets set lsp-enable-snippet to nil in your lsp-mode settings
;;   to avoid odd behavior with snippets and indentation
(use-package yasnippet)

;; Add company-lsp backend for metals
; [tflucke] 2021-12-20: This isn't in the repos anymore.  Also, I don't know why
; dependancy management won't handle this.
;(use-package company-lsp)

;; Use the Debug Adapter Protocol for running tests and debugging
(use-package posframe
  ;; Posframe is a pop-up tool that must be manually installed for dap-mode
  )
(use-package dap-mode
  :hook
  (lsp-mode . dap-mode)
  (lsp-mode . dap-ui-mode)
  )

;; Use the Tree View Protocol for viewing the project structure and triggering compilation
(use-package lsp-treemacs
  :disabled
  :config
  (lsp-metals-treeview-enable t)
  (setq lsp-metals-treeview-show-when-views-received t)
  )

(provide 'scala)