feat: Add elpaca

config.org

@@ -6,6 +6,8 @@
 
 * TABLE OF CONTENTS :toc:
 - [[#installation][Installation]]
+- [[#base-packages-to-install-first][Base packages to install first]]
+  - [[#elpaca][Elpaca]]
 - [[#workarounds][Workarounds]]
   - [[#emacs-262][Emacs 26.2]]
 - [[#utils][Utils]]
@@ -118,6 +120,111 @@ This configuration requires the installation of :
       =pip install jedi flake8 importmagic autopep8 yapf=
     - =ditaa= (for ascii to image generation in org-mode)
 
+* Base packages to install first
+
+** Elpaca
+
+Replacement for built-in package manager package.el :
+
+https://github.com/progfolio/elpaca
+
+#+BEGIN_SRC emacs-lisp
+  (defvar elpaca-installer-version 0.4)
+
+  (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
+
+				:files (:defaults (: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 (call-process "git" nil buffer t "clone"
+
+					 (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)))
+
+	      (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))
+#+END_SRC
+
+*** Use-package support
+
+#+BEGIN_SRC emacs-lisp
+  ;; Install use-package support
+(elpaca elpaca-use-package
+  ;; Enable :elpaca use-package keyword.
+  (elpaca-use-package-mode)
+  ;; Assume :elpaca t unless otherwise specified.
+  (setq elpaca-use-package-by-default t))
+#+END_SRC
+
+*** Wait till initialized
+
+#+BEGIN_SRC emacs-lisp
+;;When installing a package which modifies a form used at the top-level
+;;(e.g. a package which adds a use-package key word),
+;;use `elpaca-wait' to block until that package has been installed/configured.
+;;For example:
+;;(use-package general :demand t)
+;;(elpaca-wait)
+(elpaca-wait)
+#+END_SRC
+
 * Workarounds
 ** Emacs 26.2