Suggested emacs config (with stack)

.emacs

;; Drop this in your ~/.emacs OR ~/.emacs.d/init.el

(require 'package)
(setq package-enable-at-startup nil)
(add-to-list 'package-archives
	     '("melpa" . "https://melpa.org/packages/")
	     '("org" . "https://orgmode.org/elpa/"))
(package-initialize)

;; Bootstrap `use-package'
(unless (package-installed-p 'use-package)
	(package-refresh-contents)
	(package-install 'use-package))

(setq backup-directory-alist '(("." . "~/.emacs.d/backups"))
      backup-by-copying t    ; Don't delink hardlinks
      version-control t      ; Use version numbers on backups
      delete-old-versions t  ; Automatically delete excess backups
      )
(setq inhibit-startup-message t)
(tool-bar-mode nil)
(fset 'yes-or-no-p 'y-or-n-p)
(global-hl-line-mode t)

(use-package exec-path-from-shell
  :ensure t
  :hook (after-init . (lambda ()
                        (when (memq window-system '(mac ns x))
                          (exec-path-from-shell-initialize)))))

(use-package company
  :ensure t
  :hook (after-init . (lambda () (global-company-mode t)))
  :config
  (setq company-idle-delay 0)
  (setq company-minimum-prefix-length 3))

(use-package company-ghc
  :ensure t
  :after company
  :config
  (add-to-list 'company-backends 'company-dabbrev-code)
  (add-to-list 'company-backends 'company-ghc))

(use-package rainbow-delimiters
  :ensure t
  :hook (prog-mode . rainbow-delimiters-mode))

(use-package haskell-mode
  :ensure t
  :hook ((haskell-mode . haskell-interactive-mode)
         (haskell-mode . (lambda ()
                           (add-to-list 'company-backends 'company-dabbrev-code))))
      :config
      (setq haskell-process-type 'stack-ghci)
  :mode "\\.hs\\'")

(use-package monokai-theme
  :ensure t)

(use-package spacemacs-theme
  :defer t
  :ensure t)

(use-package doom-themes
  :defer t
  :ensure t)

(use-package doom-modeline
  :ensure t
  :hook (after-init . doom-modeline-init)
  :config (setq find-file-visit-truename t))

(load-theme 'spacemacs-dark t)