emacs-config/early-init.el

;;; Bootstrap elpaca
(setq package-enable-at-startup nil)

;; for guix emacs-next packages you can find the date with
;; ➜ stat /gnu/store/*emacs-next-[23]*.drv | rg Birth | cut -d' ' -f3 | tr -d '-'
;; 20240727
;;
;; it is possible there are more so probably the most recent one is the one to use.

(setq elpaca-core-date "20241111")
(defvar elpaca-installer-version 0.8)
(defvar elpaca-directory (expand-file-name "elpaca/" user-emacs-directory))
(defvar elpaca-builds-directory (expand-file-name "builds/" elpaca-directory))
(defvar elpaca-repos-directory (expand-file-name "repos/" elpaca-directory))
(defvar elpaca-order '(elpaca :repo "https://github.com/progfolio/elpaca.git"
                              :ref nil :depth 1
                              :files (:defaults "elpaca-test.el" (:exclude "extensions"))
                              :build (:not elpaca--activate-package)))
(let* ((repo  (expand-file-name "elpaca/" elpaca-repos-directory))
       (build (expand-file-name "elpaca/" elpaca-builds-directory))
       (order (cdr elpaca-order))
       (default-directory repo))
  (add-to-list 'load-path (if (file-exists-p build) build repo))
  (unless (file-exists-p repo)
    (make-directory repo t)
    (when (< emacs-major-version 28) (require 'subr-x))
    (condition-case-unless-debug err
        (if-let* ((buffer (pop-to-buffer-same-window "*elpaca-bootstrap*"))
                 ((zerop (apply #'call-process `("git" nil ,buffer t "clone"
                                                 ,@(when-let* ((depth (plist-get order :depth)))
                                                     (list (format "--depth=%d" depth) "--no-single-branch"))
                                                 ,(plist-get order :repo) ,repo))))
                 ((zerop (call-process "git" nil buffer t "checkout"
                                       (or (plist-get order :ref) "--"))))
                 (emacs (concat invocation-directory invocation-name))
                 ((zerop (call-process emacs nil buffer nil "-Q" "-L" "." "--batch"
                                       "--eval" "(byte-recompile-directory \".\" 0 'force)")))
                 ((require 'elpaca))
                 ((elpaca-generate-autoloads "elpaca" repo)))
            (progn (message "%s" (buffer-string)) (kill-buffer buffer))
          (error "%s" (with-current-buffer buffer (buffer-string))))
      ((error) (warn "%s" err) (delete-directory repo 'recursive))))
  (unless (require 'elpaca-autoloads nil t)
    (require 'elpaca)
    (elpaca-generate-autoloads "elpaca" repo)
    (load "./elpaca-autoloads")))
(add-hook 'after-init-hook #'elpaca-process-queues)
(elpaca `(,@elpaca-order))

;; Enable :elpaca use-package keyword.
(elpaca elpaca-use-package
        (elpaca-use-package-mode))

;; tangling to generate scripts for the local bin directory. This
;; causes the name of the scripts to be returned in the car of the
;; tangle command which is used to load the file. The net result is
;; that not the initialization is loaded, but the first exported
;; script.
(use-package ob-tangle)
(let ((src (concat user-emacs-directory "init.org"))
      (tgt (concat user-emacs-directory "init.el"))
      (enable-local-variables nil))   ;; disable local variables to prevent asking confirmation before frame is available
  (when (file-newer-than-file-p src tgt)
    (message "tangling init.org")
    (delete-file tgt)
    (org-babel-tangle-file src tgt "emacs-lisp")))