167 lines
5.6 KiB
EmacsLisp
167 lines
5.6 KiB
EmacsLisp
;;; FG42 --- The mighty editor for the emacsians -*- lexical-binding: t; -*-
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;;
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;; Copyright (c) 2010-2024 Sameer Rahmani <lxsameer@gnu.org>
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;;
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;; Author: Sameer Rahmani <lxsameer@gnu.org>
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;; URL: https://devheroes.codes/FG42/FG42
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;; Version: 4.0.0
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;;
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;
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;;; Commentary:
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;;; Code:
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(require 'fg42/utils)
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(eval-when-compile
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(defvar package-archives)
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(defvar use-package-ensure-function))
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;; ============================================================================
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;; Basic inital configuration for FG42's operations
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;; ============================================================================
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(defgroup fg42 nil
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"Customize your FG42 instance via this group of configurations."
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:group :editor)
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(defvar fg42/disabled-features nil
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"List of features to disable.")
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(defvar fg42/after-init-hook nil
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"The hook tha runs when FG42 finished running the user configuration.")
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(defvar fg42/debug? nil
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"It is t If FG42 is running in debug mode and nil otherwise.")
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(defvar fg42/-gc-cons-threshold 16777216
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"Value of GC threshold of FG42.")
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(defvar fg42/initialized nil
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"A variable that indicates whether FG42 is passed initialization.")
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(defconst fg42/cache-dir (or (getenv "FG42_CACHE_DIR")
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(path-join (or (getenv "XDG_CACHE_HOME") "~/.cache")
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"fg42")))
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(defconst fg42/config-dir (or (getenv "FG42_CONFIG_DIR")
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(path-join (or (getenv "XDG_CONFIG_HOME") "~/.config")
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"fg42")))
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(defun defer-garbage-collection ()
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"Disable garbage collection."
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(setq gc-cons-threshold fg42/-gc-cons-threshold))
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(defun restore-garbage-collection ()
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"Restore garbage collection to it's default value."
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(run-at-time
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1 nil (lambda () (setq gc-cons-threshold most-positive-fixnum))))
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(defun fg42/-startup-optimization ()
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"Optimized FG42 startup."
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;; by setting gc threshold to the largest number
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;; Emacs can understand we are basically disabling it :).
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(setq gc-cons-threshold most-positive-fixnum
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gc-cons-percentage 0.6)
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;; after initilization phase restore cons threshold to normal
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(add-hook 'emacs-startup-hook
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(lambda ()
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(setq gc-cons-threshold fg42/-gc-cons-threshold ; 16mb
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gc-cons-percentage 0.1)))
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;; disable gc when we are in minibuffer using the same method we
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;; use for initilization time
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(add-hook 'minibuffer-setup-hook #'defer-garbage-collection)
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;; just enable gc when exiting minibuffer
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(add-hook 'minibuffer-exit-hook #'restore-garbage-collection)
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;; we dont need Emacs to check every file type and look for file
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;; handlers when we are initializing so we backup the original
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;; value and set it to nil
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(setq --file-name-handler-alist file-name-handler-alist)
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(setq file-name-handler-alist nil)
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;; after initialization we can restore that file-name-handler-alist
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;; to original value.
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(add-hook 'emacs-startup-hook
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(lambda ()
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(setq file-name-handler-alist
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--file-name-handler-alist)))
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;; initial mode for emacs can be fundamental mode we have nothing to lose
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(setq initial-major-mode 'fundamental-mode))
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(defun fg42/initialize ()
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"Initialize FG42 after the Emacs window is rendered by loading the user init file."
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;; (fg42/-startup-optimization)
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(require 'fg42/editor)
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(when (file-exists-p user-init-file)
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(load user-init-file))
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(fg42/setup-editor)
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;; ;; If user didn't select a theme, load the default stuff
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;; (when (not (featurep 'fg42/themes))
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;; (require 'fg42/themes))
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(add-hook 'emacs-startup-hook
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(lambda ()
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(run-hooks 'fg42/after-init-hook)
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(run-hooks 'fg42/ui-hook)
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(setq fg42/initialized t))))
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(defun fg42/main ()
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"The entry point of FG42."
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(when (string= (getenv "FG42_DEBUG") "1")
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(setq debug-on-error t
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fg42/debug? t))
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;; We don't use any Emacs package manager, so
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;; prevent package.el to install anything at startup
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(setq package-enable-at-startup nil
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package-archives nil
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use-package-ensure-function 'ignore
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;; Setup the path for the custom.el file, We don't want
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;; to touch user's Emacs configuration.
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custom-file (path-join fg42/config-dir "custom.el")
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;; Change the config dir to `~/.config/fg42/' by default
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;; again, we don't want to temper with user's Emacs
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user-emacs-directory fg42/config-dir
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user-init-file
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(or (getenv "FG42_CONFIG_FILE")
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(path-join fg42/config-dir "fg42.el")))
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;; Change the eln file cache to leave Emacs alone.
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(startup-redirect-eln-cache
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(or (getenv "FG42_ELN_DIR")
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(path-join fg42/cache-dir "fg42.el")))
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;; Load the customization file. In FG42 it is different than
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;; the default `user-init-file'
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(if (file-exists-p custom-file)
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(load custom-file))
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;; From point forward we can use normal Elisp stuff without
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;; interfering with user's Emacs configuration
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(fg42/initialize))
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(fg42/main)
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(provide 'fg42)
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;;; fg42.el ends here
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