93 lines
4.3 KiB
EmacsLisp
93 lines
4.3 KiB
EmacsLisp
;;; early-init.el -*- lexical-binding: t; -*-
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;; Emacs 27.1 introduced early-init.el, which is run before init.el, before
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;; package and UI initialization happens, and before site files are loaded.
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;; A big contributor to startup times is garbage collection. We up the gc
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;; threshold to temporarily prevent it from running, then reset it later by
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;; enabling `gcmh-mode'. Not resetting it will cause stuttering/freezes.
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(setq gc-cons-threshold most-positive-fixnum)
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;; Prevent unwanted runtime compilation for gccemacs (native-comp) users;
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;; packages are compiled ahead-of-time when they are installed and site files
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;; are compiled when gccemacs is installed.
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(setq native-comp-deferred-compilation nil)
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;; In Emacs 27+, package initialization occurs before `user-init-file' is
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;; loaded, but after `early-init-file'. Doom handles package initialization, so
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;; we must prevent Emacs from doing it early!
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(setq package-enable-at-startup nil)
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;; In noninteractive sessions, prioritize non-byte-compiled source files to
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;; prevent the use of stale byte-code. Otherwise, it saves us a little IO time
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;; to skip the mtime checks on every *.elc file.
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(setq load-prefer-newer noninteractive)
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(unless (or (daemonp) noninteractive)
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(let ((old-file-name-handler-alist file-name-handler-alist))
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;; `file-name-handler-alist' is consulted on each `require', `load' and
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;; various path/io functions. You get a minor speed up by unsetting this.
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;; Some warning, however: this could cause problems on builds of Emacs where
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;; its site lisp files aren't byte-compiled and we're forced to load the
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;; *.el.gz files (e.g. on Alpine).
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(setq-default file-name-handler-alist nil)
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;; ...but restore `file-name-handler-alist' later, because it is needed for
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;; handling encrypted or compressed files, among other things.
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(defun doom-reset-file-handler-alist-h ()
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(setq file-name-handler-alist
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;; Merge instead of overwrite because there may have bene changes to
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;; `file-name-handler-alist' since startup we want to preserve.
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(delete-dups (append file-name-handler-alist
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old-file-name-handler-alist))))
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(add-hook 'emacs-startup-hook #'doom-reset-file-handler-alist-h 101))
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;; Premature redisplays can substantially affect startup times and produce
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;; ugly flashes of unstyled Emacs.
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(setq-default inhibit-redisplay t
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inhibit-message t)
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(add-hook 'window-setup-hook
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(lambda ()
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(setq-default inhibit-redisplay nil
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inhibit-message nil)
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(redisplay)))
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;; Site files tend to use `load-file', which emits "Loading X..." messages in
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;; the echo area, which in turn triggers a redisplay. Redisplays can have a
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;; substantial effect on startup times and in this case happens so early that
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;; Emacs may flash white while starting up.
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(define-advice load-file (:override (file) silence)
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(load file nil 'nomessage))
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;; Undo our `load-file' advice above, to limit the scope of any edge cases it
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;; may introduce down the road.
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(define-advice startup--load-user-init-file (:before (&rest _) init-doom)
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(advice-remove #'load-file #'load-file@silence)))
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;; Site files tend to use `load-file', which emits "Loading X..." messages in
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;; the echo area, which in turn triggers a redisplay. Redisplays can have a
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;; substantial effect on startup times and in this case, happens so early that
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;; Emacs may jarringly flash white while starting up.
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(define-advice load-file (:override (file) silence)
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(load file nil 'nomessage))
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;; ...Then undo our `load-file' advice above, to limit the scope of any edge
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;; cases it may introduce down the road.
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(define-advice startup--load-user-init-file (:before (&rest _) init-doom)
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(advice-remove #'load-file #'load-file@silence))
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;;
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;;; Bootstrap
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;; Contrary to what many Emacs users have in their configs, you don't need
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;; more than this to make UTF-8 the default coding system:
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(set-language-environment "UTF-8")
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;; set-language-enviornment sets default-input-method, which is unwanted
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(setq default-input-method nil)
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;; Ensure Doom is running out of this file's directory
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(setq user-emacs-directory (file-name-directory load-file-name))
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;; Load the heart of Doom Emacs
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(load (concat user-emacs-directory "core/core") nil 'nomessage)
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