72 lines
2.3 KiB
EmacsLisp
72 lines
2.3 KiB
EmacsLisp
;;; system --- System library of FG42 -*- lexical-binding: t; -*-
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;;
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;; Copyright (c) 2010-2020 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://gitlab.com/FG42/FG42
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;; Version: 3.0.0
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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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;; `System' is just a state monad which holds the state of the editor.
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;; Each system has to have a `start' function to start the setup process.
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;;
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;;; Code:
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(require 'cl-lib)
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(require 'fg42/utils)
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(cl-defstruct fg42-system
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"A `system' describes a FG42 instance. Everything that is needed
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to load FG42."
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name
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;; We will use this value for `describe-system' as a short
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;; documentation.
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docstring
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;; TODO: guess the system root based on the `name' field
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;; as the default value
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(root (concat (getenv "HOME") "/.fg42"))
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;; The directory to store all sort of temporary files including
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;; backups, flycheck temps and stuff like that.
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(tmp-path "~/.tmp")
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;; ;; A list of preloads to setup extensions which are not loaded yet.
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;; ;; For more information on preloads checkout `fg42/extension'
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;; (preloads '())
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(extensions '())
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(abilities '())
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;; A function which takes the `system' and starts it.
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(start (lambda (system) system))
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(stop nil))
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(defmacro defsystem (name &optional docstring &rest body)
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"Define a system with the given NAME, DOCSTRING and BODY."
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(declare (doc-string 2) (indent 1))
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(let ((form (if (boundp (intern (format "%s" name))) 'setq 'defvar)))
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`(,form ,name (make-fg42-system
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:name ,(symbol-name name)
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:docstring ,docstring
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,@body))))
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(provide 'fg42/system/core)
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;;; core.el ends here
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