;;; core.el --- the heart of the beast -*- lexical-binding: t; -*-

(eval-when-compile
  (and (version< emacs-version "25")
       (error "Detected Emacs %s. Doom only supports Emacs 25.1 and higher"
              emacs-version)))


;;
;; Constants
;;

(defconst doom-version "2.0.9"
  "Current version of DOOM emacs.")

(defconst doom-debug-mode (or (getenv "DEBUG") init-file-debug)
  "If non-nil, all doom functions will be verbose. Set DEBUG=1 in the command
line or use --debug-init to enable this.")

(defconst EMACS26+
  (eval-when-compile (not (version< emacs-version "26"))))
(defconst EMACS27+
  (eval-when-compile (not (version< emacs-version "27"))))

(defconst IS-MAC     (eq system-type 'darwin))
(defconst IS-LINUX   (eq system-type 'gnu/linux))
(defconst IS-WINDOWS (memq system-type '(cygwin windows-nt ms-dos)))


;;
(defconst doom-emacs-dir
  (eval-when-compile (file-truename user-emacs-directory))
  "The path to this emacs.d directory. Must end in a slash.")

(defconst doom-core-dir (concat doom-emacs-dir "core/")
  "Where essential files are stored.")

(defconst doom-modules-dir (concat doom-emacs-dir "modules/")
  "The main directory where Doom modules are stored.")

(defconst doom-local-dir (concat doom-emacs-dir ".local/")
  "Root directory for local Emacs files. Use this as permanent storage for files
that are safe to share across systems (if this config is symlinked across
several computers).")

(defconst doom-etc-dir (concat doom-local-dir "etc/")
  "Directory for non-volatile storage.

Use this for files that don't change much, like servers binaries, external
dependencies or long-term shared data.")

(defconst doom-cache-dir (concat doom-local-dir "cache/")
  "Directory for volatile storage.

Use this for files that change often, like cache files.")

(defconst doom-packages-dir (concat doom-local-dir "packages/")
  "Where package.el and quelpa plugins (and their caches) are stored.")

(defconst doom-private-dir
  (eval-when-compile
    (or (getenv "DOOMDIR")
        (let ((xdg-path
               (expand-file-name "doom/"
                                 (or (getenv "XDG_CONFIG_HOME")
                                     "~/.config"))))
          (if (file-directory-p xdg-path) xdg-path))
        "~/.doom.d/"))
  "Where your private customizations are placed. Must end in a slash. Respects
XDG directory conventions if ~/.config/doom exists.")

(defconst doom-autoload-file (concat doom-local-dir "autoloads.el")
  "Where `doom//reload-doom-autoloads' will generate its core autoloads file.")

(defconst doom-package-autoload-file (concat doom-local-dir "autoloads.pkg.el")
  "Where `doom//reload-package-autoloads' will generate its package.el autoloads
file.")


;;
;; Doom core variables
;;

(defvar doom-init-p nil
  "Non-nil if `doom-initialize' has run.")

(defvar doom-init-time nil
  "The time it took, in seconds, for DOOM Emacs to initialize.")

(defvar doom-emacs-changed-p nil
  "If non-nil, the running version of Emacs is different from the first time
Doom was setup, which can cause problems.")

(defvar doom-site-load-path load-path
  "The starting load-path, before it is altered by `doom-initialize'.")

(defvar doom-init-hook nil
  "Hooks run after all init.el files are loaded, including your private and all
module init.el files, but before their config.el files are loaded.")

(defvar doom-post-init-hook nil
  "A list of hooks run when Doom is fully initialized. Fires at the end of
`emacs-startup-hook', as late as possible. Guaranteed to run after everything
else (except for `window-setup-hook').")

(defvar doom-reload-hook nil
  "A list of hooks to run when `doom//reload-load-path' is called.")

(defvar doom--last-emacs-file (concat doom-local-dir "emacs-version.el"))
(defvar doom--last-emacs-version nil)
(defvar doom--refreshed-p nil)
(defvar doom--stage 'init)


;;
;; Optimize startup
;;

(defvar doom--file-name-handler-alist file-name-handler-alist)
(unless (or after-init-time noninteractive)
  ;; A big contributor to long startup times is the garbage collector, so we up
  ;; its memory threshold, temporarily and reset it later in `doom|finalize'.
  (setq gc-cons-threshold 402653184
        gc-cons-percentage 1.0
        ;; consulted on every `require', `load' and various file reading
        ;; functions. You get a minor speed up by nooping this.
        file-name-handler-alist nil))

(defun doom|finalize ()
  "Resets garbage collection settings to reasonable defaults (if you don't do
this, you'll get stuttering and random freezes) and resets
`file-name-handler-alist'."
  (setq file-name-handler-alist doom--file-name-handler-alist
        gc-cons-threshold 16777216
        gc-cons-percentage 0.2))

(add-hook 'emacs-startup-hook #'doom|finalize)
(add-hook 'doom-reload-hook   #'doom|finalize)


;;
;; Emacs core configuration
;;

;; UTF-8 as the default coding system
(when (fboundp 'set-charset-priority)
  (set-charset-priority 'unicode))     ; pretty
(prefer-coding-system        'utf-8)   ; pretty
(set-terminal-coding-system  'utf-8)   ; pretty
(set-keyboard-coding-system  'utf-8)   ; pretty
(set-selection-coding-system 'utf-8)   ; perdy
(setq locale-coding-system   'utf-8)   ; please
(setq-default buffer-file-coding-system 'utf-8) ; with sugar on top

(setq-default
 ad-redefinition-action 'accept   ; silence advised function warnings
 apropos-do-all t                 ; make `apropos' more useful
 auto-mode-case-fold nil
 autoload-compute-prefixes nil
 debug-on-error doom-debug-mode
 ffap-machine-p-known 'reject     ; don't ping things that look like domain names
 idle-update-delay 2              ; update ui less often
 ;; be quiet at startup; don't load or display anything unnecessary
 inhibit-startup-message t
 inhibit-startup-echo-area-message user-login-name
 inhibit-default-init t
 initial-major-mode 'fundamental-mode
 initial-scratch-message nil
 ;; keep the point out of the minibuffer
 minibuffer-prompt-properties '(read-only t point-entered minibuffer-avoid-prompt face minibuffer-prompt)
 ;; History & backup settings (save nothing, that's what git is for)
 auto-save-default nil
 create-lockfiles nil
 history-length 500
 make-backup-files nil  ; don't create backup~ files
 ;; `use-package'
 use-package-compute-statistics doom-debug-mode
 use-package-verbose doom-debug-mode
 use-package-minimum-reported-time (if doom-debug-mode 0 0.1)
 ;; byte compilation
 byte-compile-verbose doom-debug-mode
 byte-compile-warnings '(not free-vars unresolved noruntime lexical make-local)
 ;; security
 gnutls-verify-error (not (getenv "INSECURE")) ; you shouldn't use this
 tls-checktrust gnutls-verify-error
 tls-program (list "gnutls-cli --x509cafile %t -p %p %h"
                   ;; compatibility fallbacks
                   "gnutls-cli -p %p %h"
                   "openssl s_client -connect %h:%p -no_ssl2 -no_ssl3 -ign_eof")
 ;; files
 abbrev-file-name             (concat doom-local-dir "abbrev.el")
 auto-save-list-file-name     (concat doom-cache-dir "autosave")
 backup-directory-alist       (list (cons "." (concat doom-cache-dir "backup/")))
 custom-file                  (concat doom-local-dir "custom.el")
 mc/list-file                 (concat doom-etc-dir "mc-lists.el")
 pcache-directory             (concat doom-cache-dir "pcache/")
 request-storage-directory    (concat doom-cache-dir "request")
 server-auth-dir              (concat doom-cache-dir "server/")
 shared-game-score-directory  (concat doom-etc-dir "shared-game-score/")
 tramp-auto-save-directory    (concat doom-cache-dir "tramp-auto-save/")
 tramp-backup-directory-alist backup-directory-alist
 tramp-persistency-file-name  (concat doom-cache-dir "tramp-persistency.el")
 url-cache-directory          (concat doom-cache-dir "url/")
 url-configuration-directory  (concat doom-etc-dir "url/"))

(defvar doom-auto-minor-mode-alist '()
  "Alist mapping filename patterns to corresponding minor mode functions, like
`auto-mode-alist'. All elements of this alist are checked, meaning you can
enable multiple minor modes for the same regexp.")

(defun doom|enable-minor-mode-maybe ()
  "Check file name against `doom-auto-minor-mode-alist'."
  (when buffer-file-name
    (let ((name buffer-file-name)
          (remote-id (file-remote-p buffer-file-name))
          (alist doom-auto-minor-mode-alist))
      ;; Remove backup-suffixes from file name.
      (setq name (file-name-sans-versions name))
      ;; Remove remote file name identification.
      (when (and (stringp remote-id)
                 (string-match (regexp-quote remote-id) name))
        (setq name (substring name (match-end 0))))
      (while (and alist (caar alist) (cdar alist))
        (if (string-match-p (caar alist) name)
            (funcall (cdar alist) 1))
        (setq alist (cdr alist))))))
(add-hook 'find-file-hook #'doom|enable-minor-mode-maybe)

(defun doom*set-indirect-buffer-filename (orig-fn base-buffer name &optional clone)
  "In indirect buffers, `buffer-file-name' is nil, which can cause problems
with functions that require it (like modeline segments)."
  (let ((file-name (buffer-file-name base-buffer))
        (buffer (funcall orig-fn base-buffer name clone)))
    (when (and file-name buffer)
      (with-current-buffer buffer
        (unless buffer-file-name
          (setq buffer-file-name file-name
                buffer-file-truename (file-truename file-name)))))
    buffer))
(advice-add #'make-indirect-buffer :around #'doom*set-indirect-buffer-filename)

;; Truly silence startup message
(fset #'display-startup-echo-area-message #'ignore)


;;
;; Bootstrap helpers
;;

(defun doom-ensure-same-emacs-version-p ()
  "Check if the running version of Emacs has changed and set
`doom-emacs-changed-p' if it has."
  (if (load doom--last-emacs-file 'noerror 'nomessage 'nosuffix)
      (setq doom-emacs-changed-p
            (not (equal emacs-version doom--last-emacs-version)))
    (with-temp-file doom--last-emacs-file
      (princ `(setq doom--last-emacs-version ,(prin1-to-string emacs-version))
             (current-buffer))))
  (cond ((not doom-emacs-changed-p))
        ((y-or-n-p
          (format
           (concat "Your version of Emacs has changed from %s to %s, which may cause incompatibility\n"
                   "issues. If you run into errors, run `bin/doom compile :plugins` or reinstall your\n"
                   "plugins to resolve them.\n\n"
                   "Continue?")
           doom--last-emacs-version
           emacs-version))
         (delete-file doom--last-emacs-file))
        (noninteractive (error "Aborting"))
        ((kill-emacs))))

(defun doom-ensure-core-directories ()
  "Make sure all Doom's essential local directories (in and including
`doom-local-dir') exist."
  (dolist (dir (list doom-local-dir doom-etc-dir doom-cache-dir doom-packages-dir))
    (unless (file-directory-p dir)
      (make-directory dir t))))

(defun doom|display-benchmark (&optional return-p)
  "Display a benchmark, showing number of packages and modules, and how quickly
they were loaded at startup.

If RETURN-P, return the message as a string instead of displaying it."
  (funcall (if return-p #'format #'message)
           "Doom loaded %s packages across %d modules in %.03fs"
           (length package-activated-list)
           (if doom-modules (hash-table-count doom-modules) 0)
           (or doom-init-time
               (setq doom-init-time (float-time (time-subtract (current-time) before-init-time))))))

(defun doom|post-init ()
  "Run `doom-post-init-hook'. That's all."
  (run-hooks 'doom-post-init-hook))

(defun doom|run-all-startup-hooks ()
  "Run all startup Emacs hooks. Meant to be executed after starting Emacs with
-q or -Q, for example:

  emacs -Q -l init.el -f doom|run-all-startup-hooks"
  (run-hooks 'after-init-hook 'delayed-warnings-hook
             'emacs-startup-hook 'term-setup-hook
             'window-setup-hook))


;;
;; Bootstrap functions
;;

(defun doom-initialize (&optional force-p)
  "Bootstrap Doom, if it hasn't already (or if FORCE-P is non-nil).

The bootstrap process involves making sure 1) the essential directories exist,
2) the core packages are installed, 3) `doom-autoload-file' and
`doom-package-autoload-file' exist and have been loaded, and 4) Doom's core
files are loaded.

If the cache exists, much of this function isn't run, which substantially
reduces startup time.

The overall load order of Doom is as follows:

  ~/.emacs.d/init.el
  ~/.emacs.d/core/core.el
  ~/.doom.d/init.el
  Module init.el files
  `doom-init-hook'
  Module config.el files
  ~/.doom.d/config.el
  `after-init-hook'
  `emacs-startup-hook'
  `doom-post-init-hook' (at end of `emacs-startup-hook')

Module load order is determined by your `doom!' block. See `doom-modules-dirs'
for a list of all recognized module trees. Order defines precedence (from most
to least)."
  (when (or force-p (not doom-init-p))
    ;; Set this to prevent infinite recursive calls to `doom-initialize'
    (setq doom-init-p t)
    ;; `doom-autoload-file' tells Emacs where to load all its autoloaded
    ;; functions from. This includes everything in core/autoload/*.el and all
    ;; the autoload files in your enabled modules.
    (when (or force-p (not (doom-initialize-autoloads doom-autoload-file)))
      (doom-ensure-core-directories)
      (doom-ensure-same-emacs-version-p)
      ;; Ensure packages are set up and initialized
      (require 'core-packages)
      (doom-ensure-packages-initialized force-p)
      (doom-ensure-core-packages)
      ;; Regenerate `doom-autoload-file', which tells Doom where to find all its
      ;; module autoloaded functions.
      (unless (or force-p noninteractive)
        (user-error "Your doom autoloads are missing! Run `bin/doom refresh' to regenerate them")))
    ;; Loads `doom-package-autoload-file', which caches `load-path',
    ;; `auto-mode-alist', `Info-directory-list', `doom-disabled-packages' and
    ;; `package-activated-list'. A big reduction in startup time.
    (unless (or force-p
                (doom-initialize-autoloads doom-package-autoload-file)
                noninteractive)
      (user-error "Your package autoloads are missing! Run `bin/doom refresh' to regenerate them")))
  ;; Initialize Doom core
  (unless noninteractive
    (add-hook! 'emacs-startup-hook
      #'(doom|post-init doom|display-benchmark))
    (require 'core-os)
    (require 'core-ui)
    (require 'core-editor)
    (require 'core-projects)
    (require 'core-keybinds)))


;;
;; Bootstrap Doom
;;

(add-to-list 'load-path doom-core-dir)

(load custom-file t t t)
(require 'core-lib)
(require 'core-modules)
(when noninteractive
  (require 'core-dispatcher))

(doom-initialize noninteractive)
(unless noninteractive
  (doom-initialize-modules))

(after! package
  (require 'core-packages))

(provide 'core)
;;; core.el ends here