emacs-base/lisp/init-elpa.el
2018-07-23 21:43:11 -05:00

40 lines
1.3 KiB
EmacsLisp

(require 'package)
;; Repositories
;; ================
(setq package-archives
'(("melpa" . "https://melpa.org/packages/")
;;("melpa-stable" . "https://stable.melpa.org/packages/")
("gnu" . "https://elpa.gnu.org/packages/")
("org" . "https://orgmode.org/elpa/")))
(setq package-archive-priorities
'(("melpa" . 4)
("melpa-stable" . 0)
("gnu" . 1)
("org" . 3)))
;; =================
;;; Find packages if not installed
;; ================================
;;; On-demand installation of packages
(defun require-package (package &optional min-version no-refresh)
"Install given PACKAGE, optionally requiring MIN-VERSION.
If NO-REFRESH is non-nil, the available package lists will not be
re-downloaded in order to locate PACKAGE."
(if (package-installed-p package min-version)
t
(if (or (assoc package package-archive-contents) no-refresh)
(if (boundp 'package-selected-packages)
;; Record this as a package the user installed explicitly
(package-install package nil)
(package-install package))
(progn
(package-refresh-contents)
(require-package package min-version t)))))
;; ================================
(package-initialize)
(provide 'init-elpa)