Create local Emacs package repository so package upgrade never breaks.

Only installed packages will be included in the repository.

Please note console command tar and cp is required.

• Full package upgrade never breaks Emacs setup
• 15 seconds to install 115 packages
• The repository could be hosted on USB/Dropbox/GitHub, so you can install packages behind corp firewall
• Tested with Emacs 23.4, Emacs 24.3, Emacs 24.4, Emacs 24.5 on OSX/Cygwin/Windows/Linux

• Download elpa-mirror.el to somewhere (say “~/.emacs.d/site-lisp/elpa-mirror”)
• Add below code into your ~/.emacs,

(add-to-list 'load-path "~/.emacs.d/site-lisp/elpa-mirror")
(require 'elpa-mirror)

If you use native Windows Emacs, you need install Cygwin or MSYS2.

M-x elpamr-create-mirror-for-installed to create local repository.

To use the repository. Say it’s “~/myelpa”, insert below code into your ~/.emacs,

# myelpa is the ONLY repository now
(setq package-archives '(("myelpa" . "~/myelpa")))

(setq elpamr-default-output-directory "~/myelpa")

You don’t need even install elpa-mirror if running it in shell,

mkdir -p ~/myelpa && emacs --batch -l ~/.emacs.d/init.el -l ~/any-directory-you-prefer/elpa-mirror.el --eval='(setq elpamr-default-output-directory "~/myelpa")' --eval='(elpamr-create-mirror-for-installed)'

Insert below code into .emacs:

;; all-to-list will not override default elpa.
;; So now you have two repositories.
;; One is GNU elpa. Another is myelpa
(add-to-list 'package-archives
             '("myelpa" . "https://dl.dropboxusercontent.com/u/858862/myelpa/"))

My repository is https://github.com/redguardtoo/myelpa.

Insert below code into .emacs:

(add-to-list 'package-archives
             '("myelpa" . "https://raw.githubusercontent.com/redguardtoo/myelpa/master/"))

• Insert (setq elpamr-debug t) into ~/.emacs
• Reproduce bug and report at https://github.com/redguardtoo/elpa-mirror