98 lines
3.0 KiB
EmacsLisp
98 lines
3.0 KiB
EmacsLisp
;;; fpkg --- a simple package manager for FG42 -*- lexical-binding: t; -*-
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;; Copyright (C) 2015 lxsameer
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;; Author: Nic Ferrier <lxsameer@gnu.org>
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;; Keywords: lisp fg42 IDE package manager
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;; Version: 1.0.0
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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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;; 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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;; 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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;;; Commentary:
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;; Simple package manager for FG42
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;;; Code:
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(require 'cl-lib)
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(require 'subr-x)
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(require 'fpkg/installers)
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(message "Initializing FPKG")
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;; Variables ---------------------------------
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(cl-defstruct fpkg-dependency
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"Package structure for FG42."
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name
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(version "0")
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(path nil)
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(source 'elpa))
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(defvar required-packages (make-hash-table)
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"A hash of `fg42-package structure representing required packages.")
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;; Functions ----------------------------------
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(defun all-dependencies-installed? ()
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"Return t if all the dependencies installed."
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(let ((result t))
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(dolist (pkg (hash-table-values required-packages))
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(when (not (package-installed-p pkg)) (setq result nil)))
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result))
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(defun install--package (pkg)
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"Intall a package via its propreate source."
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(let* ((source (fpkg-dependency-source pkg))
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(func-name (concat "install-package-via-" (symbol-name source)))
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(install-func
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(symbol-function
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(intern func-name))))
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(funcall install-func pkg)))
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(defun fpkg-initialize ()
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"Initilize the package.el and related stuff to be used in FG42"
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(let ((packages (hash-table-values required-packages)))
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(require 'package)
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(add-to-list 'package-archives
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'("melpa" . "http://melpa.milkbox.net/packages/") t)
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(when (< emacs-major-version 24)
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;; For important compatibility libraries like cl-lib
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(add-to-list 'package-archives '("gnu" . "http://elpa.gnu.org/packages/")))
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;; Initialize package.el
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(package-initialize)
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(setq url-http-attempt-keepalives nil)
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(unless (all-dependencies-installed?)
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;; check for new packages (package versions)
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(message "%s" "Refreshing package database...")
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(package-refresh-contents)
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(message "%s" " done.")
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;; install the missing packages
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(dolist (pkg packages)
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(when (not (package-installed-p (fpkg-dependency-name pkg)))
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(install--package pkg))))))
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(defun depends-on (pkgname &rest args)
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"Global function to specify a single dependency"
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(let ((pkg (apply 'make-fpkg-dependency :name pkgname args)))
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(puthash pkgname pkg required-packages)))
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(provide 'fpkg)
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