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Can list-packages be made to work with packages from git repositories 

Here are some ideas on how to integrate it.

1. User has to set some new list-packages preferences. 

   ;; places to look for sources, ordered by preference 

   (setq preference-of-source '(git melpa other1 other2)) 

   ;; if more than one source, only show one with highest preference 

   (setq only-show-one-source t) 

   ;; change prefered source for these exceptions - '(package source opts) 

   (setq exceptions '((package-x melpa) 

                      (package-y nil '((branch . "bleeding edge")) 

   (setq default-branch 'master) 

2. A list of known useful git sources is maintained within emacs. 

   (setq available-git-packages '((package1 . get-recipe1) 

                                  (package2 . get-recipe2)) 

    el-get already maintains a list of get-recipes for packages from

    various sources git (url), github, wiki...

3. Then M-x list-packages works like it normally does. 

   when install is run it calls something like el-get with associated recipe. 

4. a key binding is available to click on package and change get-recipe. 

   i.e. set branch, tag, description, website, build instructions

5. If a git recipe is changed, a copy of the default is placed in a user

   specified directory `users-git-recipe-dir'. Changes are made to that

   recipe.  Any recipies in this directory will overshadow the default

 recipies of the same name. This is so that after an update the users 

  changes are not overwritten.

In GNU Emacs 25.1.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.14.5)

 of 2016-08-25 built on penguin

Repository revision: 95c82efdb141029de89d9136a9ce4fe907de7c5e

Windowing system distributor 'The X.Org Foundation', version 11.0.11604000

System Description: Debian GNU/Linux 8.9 (jessie)

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