:;exec `echo $EMACS` --no-site-file --no-site-lisp --batch -L ./ -l "$0" -f main "$(cd "$(dirname "$0")/." >/dev/null 2>&1 ; pwd -P)" "$@"
;;; Buid --- The builder for FG42 -*- lexical-binding: t; -*-
;;
;; Copyright (c) 2010-2021 Sameer Rahmani & Contributors
;;
;; Author: Sameer Rahmani <lxsameer@gnu.org>
;; URL: https://gitlab.com/FG42/FG42
;; Version: 3.0.0
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with thnis program.  If not, see <http://www.gnu.org/licenses/>.
;;
;;; Commentary:
;; Cubes are the building blocks of any `FG42' editor.  Each `cube' is a
;; unit which defines different abilities in a deterministic and idempotent
;; way.  Cubes are composable and a composition of cubes creates an editor.
;;
;;; Code:

(setq debug-on-error t)

(defconst fg42/CORE_DIR (concat (getenv "HOME") "/.fg42/core"))

(setq user-emacs-directory (concat (getenv "HOME") "/.fg42/emacs.d"))
(add-to-list 'load-path fg42/CORE_DIR)


(require 'fg42/build/core)

(defvar FG42-VERSION "3.0.0-snapshot"
  "The version number of the current build of FG42.")

(defconst build/usage "
Usage:

build.el [PARAMS] COMMAND [...]

COMMANDS:
  clean [DIRS]  - Clean up the given list of directories (default: \"code\" \"fbt\").
  docs          - Build the documents and convert them to HTML

PARAMS:
  :d      - Turns on the debug mode.
  :e expr - Run the given `expr' before any operation.
")



(defun print-help (command)
  "Print out a usage instructions and print out the invalid msg for COMMAND."
  (when command
    (warn "I don't know about '%s' command.\n" command))
  (message build/usage))


(defmacro do-command (&rest body)
  "Run the BODY after loading FG42."
  `(progn
     (require 'fg42)
     (fg42/before-initialize)
     ,@body))


(defun main ()
  "The entry point to the build script."
  (message (version))
  (message "\nFG42 Build tool v%s\n\n" FG42-VERSION)

  ;; UTF-8 as default encoding
  (prefer-coding-system 'utf-8)
  (set-default-coding-systems 'utf-8)
  (set-terminal-coding-system 'utf-8)
  (set-keyboard-coding-system 'utf-8)

  (setq project-root (car command-line-args-left))

  (let* ((fg42-home   (car command-line-args-left))
         (build-dir   (from-root "/build/"))
         (parsed-args (read-args (cdr command-line-args-left)))
         (eval-string (car parsed-args))
         (command     (caadr parsed-args))
         (args        (cdadr parsed-args)))

    ;; Evaluate the expression provided by :e
    (when eval-string
      (eval (car (read-from-string eval-string))))

    (cond
     ((string= command "docs")
      (do-command
       (require 'fpkg)
       (fpkg/use dash)

       (require 'fg42/build/docs)
       (fg42/build-docs build-dir)))

     ((string= command "compile")
      (do-command
       (native-compile-async fg42/CORE_DIR 'recursively)
       (native-compile-async "~/.fg42.v3.el")

       (print "Compiling FG42 files ...")
       (while (or comp-files-queue
                  (> (comp-async-runnings) 0))
         (print ".")
         (sleep-for 1))

       (message "Done")))

     (t (print-help command)))))

(provide 'build)
;;; build.el ends here