#+TITLE: IDE Configuration

* Intro
  Packages/configurations that makes emacs more IDE-like, such as:
- like popup completions with LSP
- error checking on-the-fly
- tree-view file explorer
- git Integration
- tree-sitter based syntax highlighting

* Tree Sitter
  Tree sitter highlighting in emacs.[[https://tree-sitter.github.io/tree-sitter/syntax-highlighting][
  Tree-sitter Syntax Highlighting website]]

  #+begin_src emacs-lisp

    (use-package tree-sitter
      :config
      (global-tree-sitter-mode))
    (use-package tree-sitter-langs
      :after tree-sitter)

  #+end_src

* Magit
  [[https://magit.vc][Git Interface for Emacs]]
  
  #+begin_src emacs-lisp

    (use-package magit
      :bind
      ("C-x g" . magit-status)
      ("C-x M-g" . magit-dispatch))

  #+end_src

* Treemacs

  #+begin_src emacs-lisp

    (use-package treemacs
      :defer t
      :init
      (with-eval-after-load 'winum
	(define-key winum-keymap (kbd "M-0") #'treemacs-select-window))
      :config
      (add-hook 'treemacs-mode-hook (lambda ()
				      (setq mode-line-format nil)
				      (redraw-display)))
      (progn
	(setq treemacs-collapse-dirs                   (if treemacs-python-executable 3 0)
	      treemacs-deferred-git-apply-delay        0.5
	      treemacs-directory-name-transformer      #'identity
	      treemacs-display-in-side-window          t
	      treemacs-eldoc-display                   t
	      treemacs-file-event-delay                5000
	      treemacs-file-extension-regex            treemacs-last-period-regex-value
	      treemacs-file-follow-delay               0.2
	      treemacs-file-name-transformer           #'identity
	      treemacs-follow-after-init               t
	      treemacs-expand-after-init               t
	      treemacs-git-command-pipe                ""
	      treemacs-goto-tag-strategy               'refetch-index
	      treemacs-indentation                     2
	      treemacs-indentation-string              " "
	      treemacs-indent-guide-style              'line
	      treemacs-is-never-other-window           nil
	      treemacs-max-git-entries                 5000
	      treemacs-missing-project-action          'ask
	      treemacs-move-forward-on-expand          nil
	      treemacs-no-png-images                   nil
	      treemacs-no-delete-other-windows         t
	      treemacs-project-follow-cleanup          nil
	      treemacs-persist-file                    (expand-file-name ".cache/treemacs-persist" user-emacs-directory)
	      treemacs-position                        'left
	      treemacs-read-string-input               'from-child-frame
	      treemacs-recenter-distance               0.1
	      treemacs-recenter-after-file-follow      nil
	      treemacs-recenter-after-tag-follow       nil
	      treemacs-recenter-after-project-jump     'always
	      treemacs-recenter-after-project-expand   'on-distance
	      treemacs-litter-directories              '("/node_modules" "/.venv" "/.cask")
	      treemacs-show-cursor                     nil
	      treemacs-show-hidden-files               t
	      treemacs-silent-filewatch                nil
	      treemacs-silent-refresh                  nil
	      treemacs-sorting                         'alphabetic-asc
	      treemacs-select-when-already-in-treemacs 'move-back
	      treemacs-space-between-root-nodes        t
	      treemacs-tag-follow-cleanup              t
	      treemacs-tag-follow-delay                1.5
	      treemacs-text-scale                      nil
	      treemacs-user-mode-line-format           nil
	      treemacs-user-header-line-format         nil
	      treemacs-width-is-initially-locked       nil
	      treemacs-width                           25
	      treemacs-workspace-switch-cleanup        nil)

	;; The default width and height of the icons is 22 pixels. If you are
	;; using a Hi-DPI display, uncomment this to double the icon size.
	(treemacs-resize-icons 16)

	(treemacs-follow-mode t)
	(treemacs-filewatch-mode t)
	(treemacs-fringe-indicator-mode 'always)

	(pcase (cons (not (null (executable-find "git")))
		     (not (null treemacs-python-executable)))
	  (`(t . t)
	   (treemacs-git-mode 'deferred))
	  (`(t . _)
	   (treemacs-git-mode 'simple)))

	(treemacs-hide-gitignored-files-mode nil))
      :bind
      (:map global-map
	    ("M-0"       . treemacs-select-window)
	    ("C-x t 1"   . treemacs-delete-other-windows)
	    ("C-x t t"   . treemacs)
	    ("C-x t B"   . treemacs-bookmark)
	    ("C-x t C-t" . treemacs-find-file)
	    ("C-x t M-t" . treemacs-find-tag)))

    (use-package treemacs-icons-dired
      :config (treemacs-icons-dired-mode))

    (use-package treemacs-magit
      :after (treemacs magit)
      :ensure t)

  #+end_src

* Flycheck

  #+begin_src emacs-lisp

    (use-package flycheck
      :init
      (global-flycheck-mode))

  #+end_src
 
* LSP Mode
  This package provides a LSP interface for emacs, for autocompletion
  
  #+begin_src emacs-lisp

    (use-package lsp-mode
      :init
      (setq lsp-keymap-prefix "C-l")
      :hook
      (lsp-mode . lsp-enable-which-key-integration)
      (lsp-mode . lsp-completion-mode)
      :custom
      (lsp-eldoc-render-all t)
      :commands (lsp lsp-mode lsp-deferred))


    (use-package lsp-ui
      :commands lsp-ui-mode
      :custom
      (lsp-ui-peek-always-show t)
      (lsp-ui-sideline-show-hover t)
      (lsp-ui-doc-position 'bottom))

    (use-package lsp-treemacs
       :after lsp-mode
       :hook (lsp-mode . lsp-treemacs-symbols))

 #+end_src
 
* Company Mode
  
  #+begin_src emacs-lisp

    (use-package company
      :after lsp-mode
      :hook (lsp-mode . company-mode)
      :bind
      (:map company-active-map
	    ("<tab>" . company-complete-selection))
      (:map lsp-mode-map
	    ("<tab>" . company-indent-or-complete-common))
      :custom
      (company-minimum-prefix-length 1)
      (company-idle-delay 0.0))

    (use-package company-box
      :after company
      :hook (company-mode . company-box-mode))

  #+end_src