dotfiles/init.el

;;; init.el --- Initialization file for emacs
;;; Commentary: Emacs startup file --- initialization file for emacs
(setq
  custom-file (concat user-emacs-directory ".emacs-customize.el")
  require-final-newline t)

;; Track emacs load time
(defconst emacs-start-time (current-time))

;; Other configs
(setq make-backup-files nil)
(setq auto-save-default nil)
(global-auto-revert-mode t)

;; Splash Screen
(setq inhibit-startup-screen t)
(setq initial-scratch-message ";; Happy Hacking")

;; Show matching parens
(setq show-paren-delay 0)
(show-paren-mode 1)
(electric-pair-mode 1)

;; UI configurations
(if (display-graphic-p)
  (progn
    (tool-bar-mode -1)
    (scroll-bar-mode -1)))
(tooltip-mode     -1)
(menu-bar-mode    -1)
(global-linum-mode 1)

;; Font configurations
(add-to-list 'default-frame-alist '(font . "Iosevka-14"))
(add-to-list 'default-frame-alist '(height . 24))
(add-to-list 'default-frame-alist '(width . 80))
(add-to-list 'default-frame-alist '(fullscreen . maximized))

;;; Package Management
(require 'package)
(setq package-enable-at-startup nil)
(setq package-archives
      '(("org"   . "http://orgmode.org/elpa/")
        ("gnu"   . "http://elpa.gnu.org/packages/")
        ("melpa" . "https://melpa.org/packages/")))
(package-initialize)

;; Bootstrap `use-package`
(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))
(eval-when-compile
  (require 'use-package))

;; always download all packages if not already downloaded
(setq use-package-always-ensure t)
;; keep stats about packages
(setq use-package-compute-statistics t)
; no longer included with use-package by default
(use-package diminish)
(use-package auto-package-update
             :ensure t
             :config
             (setq auto-package-update-delete-old-versions t
                   auto-package-update-interval 4)
             (auto-package-update-maybe))

;; Restart emacs from within emacs
(use-package restart-emacs
             :ensure t)

;; Theme
(use-package doom-themes
             :ensure t
             :config
             (load-theme 'doom-molokai t))

;; Auto enforced consistence
(use-package editorconfig
             :diminish "↹"
             :init
             (setq auto-mode-alist
                   (cl-union auto-mode-alist
                             '(("\\.editorconfig\\'" . editorconfig-conf-mode)
                               ("editorconfig\\'"  . editorconfig-conf-mode))))
             :config
             (editorconfig-mode 1))

(use-package smartparens
             :hook ((prog-mode-hook) . smartparens-mode)
             :config
             (require 'smartparens-config))

(use-package aggressive-indent
             :diminish "⇉"
             :config
             (global-aggressive-indent-mode t))

(use-package fzf
             :ensure t)

;; Anzu for search matching
(use-package anzu
             :ensure t
             :config
             (global-anzu-mode 1)
             (global-set-key [remap query-replace-regexp]
                             'anzu-query-replace-regexp)
             (global-set-key [remap query-replace]
                             'anzu-query-replace))

(use-package avy
             :defer t
             :init
             (progn
               (setq avy-all-windows 'all-frames)
               (setq avy-background t)))

(use-package dumb-jump
             :ensure t)

;; Vim mode
(use-package evil
             :ensure t
             :config
             (evil-mode 1))
(use-package evil-escape
             :ensure t
             :init
             (setq-default evil-escape-key-sequence "jk")
             :config
             (evil-escape-mode 1))
(use-package evil-nerd-commenter
             :ensure t)
(use-package evil-surround
             :ensure t
             :config
             (global-evil-surround-mode 1))
(use-package disable-mouse
             :ensure t
             :config
             (global-disable-mouse-mode))

;; Helm
(use-package helm
             :ensure t
             :init
             (setq helm-M-x-fuzzy-match t
                   helm-mode-fuzzy-match t
                   helm-buffers-fuzzy-matching t
                   helm-recentf-fuzzy-match t
                   helm-locate-fuzzy-match t
                   helm-semantic-fuzzy-match t
                   helm-imenu-fuzzy-match t
                   helm-completion-in-region-fuzzy-match t
                   helm-candidate-number-list 80
                   helm-split-window-inside-p t
                   helm-move-to-line-cycle-in-source t
                   helm-echo-input-in-header-line t
                   helm-autoresize-max-height 0
                   helm-autoresize-min-height 20)
             :config
             (helm-mode 1))
;; RipGrep
(use-package helm-rg :ensure t)
;; Projectile
(use-package projectile
             :ensure t
             :init
             (setq projectile-require-project-root nil)
             :config
             (projectile-mode 1))
;; Helm Projectile
(use-package helm-projectile
             :ensure t
             :init
             (setq helm-projectile-fuzzy-match t)
             :config
             (helm-projectile-on))

;; All The Icons
(use-package all-the-icons :ensure t)

;; Which Key
(use-package which-key
             :ensure t
             :init
             (setq which-key-separator " ")
             (setq which-key-prefix-prefix "+")
             :config
             (which-key-mode))

;; Git Support
(use-package magit
             :defer t)
(use-package evil-magit
             :defer t)
(use-package magit-gitflow
             :defer t)
(use-package helm-git-grep
             :defer t)
(use-package helm-gitignore
             :defer t)
(use-package git-commit
             :defer t)
(use-package git-messenger
             :defer t
             :config
             (define-key git-messenger-map [escape] 'git-messenger:popup-close))
(use-package gitattributes-mode
             :defer t)
(use-package gitconfig-mode
             :defer t)
(use-package gitignore-mode
             :defer t)
(use-package git-link
             :defer t
             :config
             (setq git-link-open-in-browser t))
(use-package git-gutter
             :defer t
             :config
             (global-git-gutter-mode +1))
(use-package gitignore-templates
             :defer t)

;; See below 3 links for why config has been set like this
;; https://stackoverflow.com/questions/25517190/missing-complete-candidate-for-verilog-mode-with-company-mode
;; https://github.com/flycheck/flycheck/issues/740
;; https://github.com/flycheck/flycheck/issues/1250
(use-package verilog-mode
  :defer t
  :config
  (add-to-list 'company-keywords-alist (cons 'verilog-mode verilog-keywords))
  (setq flycheck-verilog-verilator-executable "verilator_bin"))

;; Custom keybinding
(use-package general
             :ensure t
             :init
             (setq general-override-states '(insert
                                              emacs
                                              hybrid
                                              normal
                                              visual
                                              motion
                                              operator
                                              replace))
             :config
             (general-define-key
               :states '(normal visual insert emacs)
               :prefix "SPC"
               :non-normal-prefix "M-SPC"
               "TAB" '(switch-to-prev-buffer
                        :which-key "previous buffer")
               "SPC" '(helm-M-x :which-key "M-x")
               ;; fuzzy search
               "ff"  '(fzf :which-key "fuzzy file search")
               ;; Projectile
               "/"   '(helm-projectile-rg
                        :which-key "ripgrep")
               "pf"  '(helm-projectile-find-file
                        :which-key "find files")
               "pF"  '(helm-projectile-find-file-dwim
                        :which-key "find files dwim")
               "pp"  '(helm-projectile-switch-project
                        :which-key "switch project")
               "pb"  '(helm-projectile-switch-to-buffer
                        :which-key "switch buffer")
               "pr"  '(helm-projectile-recent
                        :which-key "show recent")
               "pd"  '(helm-projectile-find-dir
                        :which-key "find dir")
               "ph"  '(helm-projectile
                        :which-key "helm projectile")
               ;; Buffers
               "bb"  '(helm-mini :which-key "buffers list")
               ;; Window
               "wl"  '(windmove-right :which-key "move right")
               "wh"  '(windmove-left :which-key "move left")
               "wk"  '(windmove-up :which-key "move up")
               "wj"  '(windmove-down :which-key "move bottom")
               "w/"  '(split-window-right :which-key "split right")
               "w-"  '(split-window-below :which-key "split bottom")
               "wx"  '(delete-window :which-key "delete window")
               "qz"  '(delete-frame :which-key "delete frame")
               "qq"  '(kill-emacs :which-key "quit")
               "qr"  '(restart-emacs :which-key "restart emacs")
               ;; Others
               "at"  '(eshell :which-key "open terminal")
               ;; Magit key bindings
               "gc"  '(magit-clone
                        :which-key "magit clone")
               "gff" '(magit-find-file
                        :which-key "magit find file")
               "gfl" '(magit-log-buffer-file
                        :which-key "magit log buffer file")
               "gfd" '(magit-diff-dwim
                        :which-key "magit diff buffer file popup")
               "gi"  '(magit-init
                        :which-key "magit initialize")
               "gL"  '(magit-list-repositories
                        :which-key "magit list repositories")
               "gm"  '(magit-dispatch-popup
                        :which-key "magit dispatch popup")
               "gs"  '(magit-status
                        :which-key "open Magit status buffer")
               "gS"  '(magit-stage-file
                        :which-key "magit stage file")
               "gU"  '(magit-unstage-file
                        :which-key "magit unstage file")
               "g/"  '(helm-git-grep
                        :which-key "open helm git grep")
               "g*"  '(helm-git-grep-at-point
                        :which-key "open helm git grep at point")
               "gI"  '(helm-gitignore
                        :which-key "helm gitignore")
               "%"   'magit-gitflow-popup
               "gti" 'gitignore-templates-insert
               "gtn" 'gitignore-templates-new-file
               "gM"  'git-messenger:popup-message
               "gll" 'spacemacs/git-link
               "glL" 'spacemacs/git-link-copy-url-only
               "glc" 'spacemacs/git-link-commit
               "glC" 'spacemacs/git-link-commit-copy-url-only
               ;; evil nerd commenter
               "ci"  'evilnc-comment-or-uncomment-lines
               "cl"  'evilnc-quick-comment-or-uncomment-to-the-line
               "ll"  'evilnc-quick-comment-or-uncomment-to-the-line
               "cc"  'evilnc-copy-and-comment-lines
               "cp"  'evilnc-comment-or-uncomment-paragraphs
               "cr"  'comment-or-uncomment-region
               "cv"  'evilnc-toggle-invert-comment-line-by-line
               "."   'evilnc-copy-and-comment-operator
               "\\"  'evilnc-comment-operator
               "jb"  'avy-pop-mark
               "jj"  'evil-avy-goto-char-timer
               "jl"  'evil-avy-goto-line
               "jw"  'evil-avy-goto-word-or-subword-1
               ;; dumb jump
               "dg"  'dumb-jump-go
               "dp"  'dump-jump-back
               "dq"  'dump-jump-quick-look
               "dw"  'dumb-jump-go-other-window
               "de"  'dumb-jump-go-prefer-external
               "do"  'dumb-jump-go-prefer-external-other-window
               "dp"  'dumb-jump-go-prompt
               ;; xref
               "xv"  'visit-tags-table
               "xd"  'xref-find-definitions
               "xr"  'xref-find-references
               "xa"  'xref-find-apropos
               "xf"  'xref-find-definitions-other-frame
               "xp"  'xref-pop-marker-stack
               "xq"  'xref-query-replace-in-results
               "xs"  'tags-search))

(general-define-key
  :states '(normal visual emacs)
  :prefix "SPC m"
  :keymaps 'haskell-mode-map
  ;; Haskell bindings
  "f"  '(hindent-reformat-decl
          :which-key "format declaration using hindent")
  "F"  '(haskell-mode-stylish-buffer
          :which-key "format buffer using haskell stylish")
  "rb" '(hlint-refactor-refactor-buffer
          :which-key "apply all hlint suggestions")
  "rr" '(hlint-refactor-refactor-at-point
          :which-key "apply hlint suggestion under cursor"))

(general-define-key
  :states '(normal visual emacs)
  :prefix "SPC m"
  :keymaps 'rust-mode-map
  "c." '(cargo-process-repeat
         :which-key "repeat the last cargo command")
  "cC" '(cargo-process-clean
         :which-key "remove build artifacts with cargo")
  "cX" '(cargo-process-run-example
         :which-key "execute project example with cargo")
  "cc" '(cargo-process-build
         :which-key "compile project with cargo")
  "cd" '(cargo-process-doc
         :which-key "generate documentation with cargo")
  "cD" '(cargo-process-doc-open
         :which-key "open cargo docs")
  "ce" '(cargo-process-bench
         :which-key "run benchmarks with cargo")
  "cf" '(cargo-process-fmt
         :which-key "format all project files with rustfmt")
  "ci" '(cargo-process-init
         :which-key "create a new project with cargo")
  "cl" '(cargo-process-clippy
         :which-key "run linter with cargo")
  "cn" '(cargo-process-new
         :which-key "create new project with cargo")
  "co" '(cargo-process-current-file-tests
         :which-key "run all tests in current file with cargo")
  "cs" '(cargo-process-search
         :which-key "search for packages on crates.io")
  "ct" '(cargo-process-current-test
         :which-key "run the current test with cargo")
  "cu" '(cargo-process-update
         :which-key "update dependencies with cargo")
  "cx" '(cargo-process-run
         :which-key "execute a process with cargo")
  "cv" '(cargo-process-check
         :which-key "verify a project with cargo")
  "t"  '(cargo-process-test
         :which-key "run test with cargo")
  "==" '(rust-format-buffer
         :which-key "rust reformat the buffer"))

(general-define-key
  :states '(normal visual emacs)
  :prefix "SPC m"
  :keymaps 'lisp-mode-map
  "cc" '(slime-compile-file
          :which-key "compile file")
  "cC" '(slime-compile-and-load-file
          :which-key "compile file and load")
  "cl" '(slime-load-file
          :which-key "load file")
  "cf" '(slime-compile-defun
          :which-key "compile function")
  "cr" '(slime-compile-region
          :which-key "compile region")
  "cn" '(slime-remove-notes
          :which-key "remove compilation notes")

  "eb" '(slime-eval-buffer
          :which-key "evaluate buffer")
  "ef" '(slime-eval-defun
          :which-key "evaluate top level sexpr")
  "eF" '(slime-undefine-function
          :which-key "undefine the fn at point")
  "ee" '(slime-eval-last-expression
          :which-key "evaluate last sexpr")
  "er" '(slime-eval-region
          :which-key "evaluate region")

  "gb" '(slime-pop-find-definition-stack
          :which-key "go back")
  "gn" '(slime-next-note
          :which-key "next note")
  "gN" '(slime-previous-note
          :which-key "previous note")

  "ha" '(slime-apropos
          :which-key "SLIME appropos")
  "hA" '(slime-apropos-all
          :which-key "SLIME appropos all")
  "hd" '(slime-disassemble-symbol
          :which-key "disassemble symbol at point")
  "hh" '(slime-describe-symbol
          :which-key "describe symbol at point")
  "hH" '(slime-hyperspec-lookup
          :which-key "hyperspec lookup symbol at point")
  "hi" '(slime-inspect-definition
          :which-key "inspect defintion")
  "hp" '(slime-apropos-package
          :which-key "browse appropos results for package's exported symbols")
  "ht" '(slime-toggle-trace-definition
          :which-key "toggle tracing of function at point")
  "hT" '(slime-untrace-all
          :which-key "untrace all functions")
  "h<" '(slime-who-calls
          :which-key "show all known callers")
  "h>" '(slime-calls-who
          :which-key "show all known callees")

  "hr" '(slime-who-references
          :which-key "show references to global variable")
  "hm" '(slime-who-macroexpands
          :which-key "show all usages of a macro")
  "hs" '(slime-who-specializes
          :which-key "show all methods specialized on a class")

  "ma" '(slime-macroexpand-all
          :which-key "macroexpand the expr at point completely")
  "mo" '(slime-macroexpand-1
          :which-key "macroexpand the expr at point once")

  "se" '(slime-eval-last-expression-in-repl
          :which-key "evaluate last sexpr in repl")
  "si" '(slime
          :which-key "start an inferior process")
  "sq" '(slime-quit-lisp
          :which-key "quit")

  "tf" '(slime-toggle-fancy-trace))

(general-define-key
  :states '(normal visual emacs)
  :prefix "SPC m"
  :keymaps 'scheme-mode-map
  "'"   '(geiser-mode-switch-to-repl)
  ","   '(lisp-state-toggle-lisp-state)
  "cc"  '(geiser-compile-current-buffer
           :which-key "compile current buffer")
  "cp"  '(geiser-add-to-load-path
           :which-key "add directory to load path")

  "eb"  '(geiser-eval-buffer
           :which-key "evaluate the whole buffer")
  "ee"  '(geiser-eval-last-sexp
           :which-key "evaluate last sexp")
  "ef"  '(geiser-eval-definition
           :which-key "evaluate current function")
  "el"  '(lisp-state-eval-sexp-end-of-line
           :which-key "evaluate line")
  "er"  '(geiser-eval-region
           :which-key "evaluate region")

  "gb"  '(geiser-pop-symbol-stack
           :which-key "go back")
  "gm"  '(geiser-edit-module
           :which-key "goto module")
  "gn"  '(next-error
           :which-key "next error")
  "gN"  '(previous-error
           :which-key "previous error")

  "hh"  '(geiser-doc-symbol-at-point
           :which-key "docs for symbol at point")
  "hd"  '(geiser-doc-look-up-manual
           :which-key "look up manual entry for symbol at point")
  "hm"  '(geiser-doc-module
           :which-key "display exports for module")
  "h<"  '(geiser-xref-callers
           :which-key "display callers")
  "h>"  '(geiser-xref-callees
           :which-key "display callees")

  "il"  '(geiser-insert-lambda
           :which-key "insert lambda")

  "me"  '(geiser-expand-last-sexp
           :which-key "macroexpand last sexp")
  "mf"  '(geiser-expand-definition
           :which-key "macroexpand surrounding sexp")
  "mx"  '(geiser-expand-region
           :which-key "macroexpand region")

  "si"  '(geiser-mode-switch-to-repl
           :which-key "start or switch to repl")
  "sb"  '(geiser-eval-buffer
           :which-key "send buffer to repl")
  "sB"  '(geiser-eval-buffer-and-go
           :which-key "send buffer to repl and focus it")
  "sf"  '(geiser-eval-definition
           :which-key "send definition to repl")
  "sF"  '(geiser-eval-definition-and-go
           :which-key "send definition to repl and focus it")
  "se"  '(geiser-eval-last-sexp
           :which-key "send last sexp to repl")
  "sr"  '(geiser-eval-region
           :which-key "send region to repl")
  "sR"  '(geiser-eval-region-and-go
           :which-key "send region to repl and focus it")
  "ss"  '(geiser-set-scheme
           :which-key "select scheme implementation"))

;(general-define-key
  ;:states '(normal visual emacs)
  ;:prefix "SPC m"
  ;:keymaps 'go-mode-map
  ;"hh" '(godoc-at-point
          ;:which-key "godoc at point")
  ;"ig" '(go-goto-imports
          ;:which-key "goto imports")
  ;"ia" '(go-import-add
          ;:which-key "add imports")
  ;"ir" '(go-remove-unused-imports
          ;:which-key "remove unused imports")
  ;"eb" '(go-play-buffer
          ;:which-key "go-play buffer")
  ;"er" '(go-play-region
          ;:which-key "go-play region")
  ;"ed" '(go-download-play
          ;:which-key "download go-play snippet")
  ;"xx" '(go-run-main
          ;:which-key "run go run for current main package")
  ;"ga" '(ff-find-other-file
          ;:which-key "jump to matching test file or back")
  ;"gc" '(go-coverage
          ;:which-key "open a clone of buffer with coverage info")
  ;"rn" '(go-rename
          ;:which-key "go rename")

  ;"fd" '(go-guru-describe
          ;:which-key "go-guru describe symbol at point")
  ;"ff" '(go-guru-freevars
          ;:which-key "go-guru show free variables")
  ;"fi" '(go-guru-implements
          ;:which-key "go-guru show implements relation")
  ;"fc" '(go-guru-peers
          ;:which-key "go-guru show channel sends/receives")
  ;"fr" '(go-guru-referrers
          ;:which-key "go-guru show referrers")
  ;"fj" '(go-guru-definition
          ;:which-key "go-guru jump to symbol definition")
  ;"fp" '(go-guru-pointsto
          ;:which-key "go-guru show what select expr points to")
  ;"fs" '(go-guru-callstack
          ;:which-key "go-guru show call stack")
  ;"fe" '(go-guru-whicherrs
          ;:which-key "go-guru show possible constants/types for error value")
  ;"f<" '(go-guru-callers
          ;:which-key "go-guru show possible callers")
  ;"f>" '(go-guru-callees
          ;:which-key "go-guru show call targets")
  ;"fo" '(go-guru-set-scope
          ;:which-key "go-guru set analysis scope"))

;; custom functions
(defun spacemacs/git-link-copy-url-only ()
  "Only copy the generated link to the kill ring."
  (interactive)
  (let (git-link-open-in-browser)
    (call-interactively 'spacemacs/git-link)))

(defun spacemacs/git-link-commit-copy-url-only ()
  "Only copy the generated link to the kill ring."
  (interactive)
  (let (git-link-open-in-browser)
    (call-interactively 'spacemacs/git-link-commit)))

(defun spacemacs/git-link ()
  "Allow the user to run git-link in a git-timemachine buffer."
  (interactive)
  (require 'git-link)
  (if (and (boundp 'git-timemachine-revision)
           git-timemachine-revision)
      (cl-letf (((symbol-function 'git-link--branch)
                 (lambda ()
                   (car git-timemachine-revision))))
        (call-interactively 'git-link))
    (call-interactively 'git-link)))

(defun spacemacs/git-link-commit ()
  "Allow the user to run git-link-commit in a git-timemachine buffer."
  (interactive)
  (require 'git-link)
  (if (and (boundp 'git-timemachine-revision)
           git-timemachine-revision)
      (cl-letf (((symbol-function 'word-at-point)
                 (lambda ()
                   (car git-timemachine-revision))))
        (call-interactively 'git-link-commit))
    (call-interactively 'git-link-commit)))

(defun go-run-main ()
  (interactive)
  (shell-command
    (format "go run %s"
            (shell-quote-argument (buffer-file-name)))))

;; Fancy titlebar for MacOS
(add-to-list 'default-frame-alist '(ns-transparent-titlebar . t))
(add-to-list 'default-frame-alist '(ns-appearance . dark))
(setq ns-use-proxy-icon  nil)
(setq frame-title-format nil)

;; Flycheck
(use-package flycheck
             :ensure t
             :init (global-flycheck-mode))
;; To disable flycheck while working with this file
(setq-default flycheck-disabled-checkers '(emacs-lisp-checkdoc))

;; Company mode
(use-package company
             :ensure t
             :diminish "⇥"
             :init
             (add-hook 'after-init-hook 'global-company-mode)
             (setq company-minimum-prefix-length 3)
             (setq company-auto-complete nil)
             (setq company-idle-delay 0)
             (setq company-require-match 'never)
             (setq company-frontends
                   '(company-pseudo-tooltip-unless-just-one-frontend
                      company-preview-frontend company-echo-metadata-frontend))
             (setq tab-always-indent 'complete)
             (defvar completion-at-point-functions-saved nil)
             :config
             (global-company-mode 1)
             (define-key company-active-map (kbd "TAB")
                         'company-complete-common-or-cycle)
             (define-key company-active-map (kbd "<tab>")
                         'company-complete-common-or-cycle)
             (define-key company-active-map (kbd "S-TAB")
                         'company-select-previous)
             (define-key company-active-map (kbd "<backtab>")
                         'company-select-previous)
             (define-key company-mode-map [remap indent-for-tab-command]
                         'company-indent-for-tab-command)
             (defun company-indent-for-tab-command (&optional arg)
               (interactive "P")
               (let ((completion-at-point-functions-saved completion-at-point-functions)
                     (completion-at-point-functions '(company-complete-common-wrapper)))
                 (indent-for-tab-command arg)))

 (defun company-complete-common-wrapper ()
   (let ((completion-at-point-functions completion-at-point-functions-saved))
     (company-complete-common))))

(use-package company-quickhelp
             :init
             (company-quickhelp-mode 1))

;; Powerline
(use-package spaceline
             :ensure t
             :init
             (setq powerline-default-separator 'slant)
             :config
             (spaceline-emacs-theme)
             (spaceline-toggle-minor-modes-off)
             (spaceline-toggle-buffer-size-off)
             (spaceline-toggle-evil-state-on))

;;; Language Support

;; Haskell support
(use-package haskell-mode
             :defer t
             :init
             (electric-indent-mode 0)
             :custom
             ((haskell-process-type 'stack-ghci)
              (haskell-process-suggest-remove-import-lines t)
              (haskell-process-auto-import-loaded-modules t)
              (haskell-process-log t)
              (haskell-stylish-on-save t)

              (haskell-indentation-layout-offset 4)
              (haskell-indentation-starter-offset 4)
              (haskell-indentation-left-offset 4)
              (haskell-indentation-where-pre-offset 4)
              (haskell-indentation-where-post-offset 4)))
(use-package flycheck-haskell
             :defer t
             :config
             (setq-default flycheck-disabled-checkers '(haskell-stack-ghc))
             :hook
             (haskell-mode . #'flycheck-haskell-setup))
(use-package company-ghci
             :defer t
             :config
             (push 'company-ghci company-backends)
             :hook
             (haskell-interactive-mode . company-mode))
(use-package hindent
             :defer t
             :config
             (setq-default hindent-reformat-buffer-on-save t)
             :hook
             (haskell-mode . #'hindent-mode))
(use-package hlint-refactor
             :defer t)
(use-package rainbow-delimiters
             :ensure t
             :hook
             (prog-mode-hook . rainbow-delimiters-mode))

;; Rust support
(use-package rust-mode
             :defer t
             :ensure t
             :config
             (setq rust-format-on-save t))
(use-package racer
             :defer t
             :hook
             ((rust-mode . racer-mode)
              (racer-mode . eldoc-mode)
              (racer-mode . company-mode)))
(use-package cargo
             :defer t)

;; LISP support
(use-package evil-cleverparens
             :ensure t)
(use-package parinfer
             :ensure t
             :init
             (progn
               (setq parinfer-extensions '(defaults
                                           pretty-parens
                                           evil
                                           paredit
                                           smart-tab
                                           smart-yank)))
             :hook
             ((emacs-lisp-mode . parinfer-mode)
              (common-lisp-mode . parinfer-mode)
              (lisp-mode . parinfer-mode)
              (scheme-mode . parinfer-mode)))
(use-package slime
             :commands slime-mode
             :init
             (progn
               (setq slime-contribs '(slime-asdf
                                       slime-fancy
                                       slime-indentation
                                       slime-sbcl-exts
                                       slime-scratch)
                     inferior-lisp-program "sbcl")
               (setq slime-complete-symbol*-fancy t)
               (setq slime-complete-symbol-function 'slime-fuzzy-complete-symbol)
               (defun slime/disable-smartparens ()
                 (smartparens-strict-mode -1)
                 (turn-off-smartparens-mode))
               (add-hook 'slime-repl-mode-hook #'slime/disable-smartparens))
             :config
             (slime-setup))

;; scheme support
(use-package geiser
             :defer t
             :commands run-geiser
             :hook
             (scheme-mode . company-mode))

;; go support
;(use-package company-go
             ;:defer t
             ;:init
             ;(progn
               ;(setq company-go-show-annotation t)
               ;(push 'company-go company-backends)))
;(use-package go-impl
             ;:defer t)
;(use-package go-guru
             ;:defer t)
;(use-package go-mode
             ;:defer t
             ;:init
             ;(setq-local tab-width 8)
             ;:config
             ;(add-hook 'before-save-hook 'gofmt-before-save)
             ;:hook
             ;(go-mode . company-mode))

;;; init.el ends