Port emacs init to emacs 27

.emacs.d/config.org

@@ -752,7 +752,6 @@ Set file paths for built-in features like: auto-saves, backups, etc.
   (setq auto-save-file-name-transforms `((".*" ,auto-save-list-file-prefix t)))
   (setq backup-directory-alist         `((".*" . ,(concat dot-cache-dir "/backup/"))))
   (setq eshell-directory-name           (concat dot-cache-dir "/eshell/"))
-  (setq package-user-dir                (concat dot-emacs-dir "/elpa"))
   (setq tramp-auto-save-directory       (concat dot-cache-dir "/tramp-auto-save/"))
   (setq tramp-backup-directory-alist    backup-directory-alist)
   (setq url-configuration-directory     (concat dot-cache-dir "/url/"))

.emacs.d/early-init.el

@@ -0,0 +1,42 @@
+;;; early-init.el --- -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Emacs 27 introduces early-init.el, which is run before package and UI
+;; initialization happens.
+
+;;; Code:
+
+;; Defer the garbage collection during startup
+(setq gc-cons-threshold most-positive-fixnum)
+(add-hook 'emacs-startup-hook (lambda () (setq gc-cons-threshold 8000000)))
+
+;; -------------------------------------
+
+;; Base directory
+(setq user-emacs-directory (file-name-directory load-file-name))
+
+;; -------------------------------------
+
+;; Set package install location
+(setq package-user-dir (concat user-emacs-directory "elpa"))
+
+;; Set package quickstart location
+(setq package-quickstart-file (concat
+							   (getenv "XDG_CACHE_HOME")
+							   "/emacs/package-quickstart.el"))
+
+;; Precompute activation actions to speed up startup
+(setq package-quickstart t)
+
+;; -------------------------------------
+
+;; Disable frame bars before they're loaded in
+(push '(menu-bar-lines . 0) default-frame-alist)
+(push '(tool-bar-lines . 0) default-frame-alist)
+(push '(vertical-scroll-bars) default-frame-alist)
+
+;; Do not resize the frame
+(setq frame-inhibit-implied-resize t)
+
+;;; early-init.el ends here

.emacs.d/init.el

@@ -1,35 +1,24 @@
-;;; init.el --- Emacs init file
+;;; init.el --- -*- lexical-binding: t; -*-
 
 ;;; Commentary:
 
-;; Setup package manager and build configuration file.
+;; Setup package archives and build configuration file.
 
 ;;; Code:
 
-;; Increases garbage collection during startup
-(setq gc-cons-threshold most-positive-fixnum)
-(add-hook 'emacs-startup-hook (lambda () (setq gc-cons-threshold 8000000)))
-
-; --------------------------------------
-
-;; Add the melpa repository to the package manager
 (require 'package)
-(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
 
-;; Activate autoloads
-(package-initialize)
+;; Add the MELPA repository to the package manager
+(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
 
-;; Install the 'use-package' dependency
+;; Install the `use-package' dependency
 (unless (package-installed-p 'use-package)
   (package-refresh-contents)
   (package-install 'use-package))
 
-; --------------------------------------
-
-;; Base directory
-(setq user-emacs-directory (file-name-directory load-file-name))
+;; -------------------------------------
 
-;; Tangle configuration file
+;; Tangle and load configuration file
 (require 'org)
 (when (file-readable-p (concat user-emacs-directory "config.org"))
   (org-babel-load-file (concat user-emacs-directory "config.org")))