%% MELPA

*MELPA* or *Milkypostman's ELPA* or *Milkypostman's Experimental Lisp Package Repository* if you're not into the whole brevity thing.

[ [Packages](#current-list-of-packages) ]
[ [Installing](#installing) ]
[ [Known Issues](#known-issues) ]
[ [Updating Packages](#updating-packages) ]
[ [Development](#development) ]

**Last Update:** *<%= Time.now.strftime("%Y.%m.%d %H:%M %z") %>* -- follow [@melpa_emacs on Twitter](https://twitter.com/melpa_emacs) for updates

<%
  require 'json'
  archive_json = JSON.parse(File.open("../archive.json").read)
  recipe_json  = JSON.parse(File.open("../recipes.json").read)

  headers = ["Package", "Version", "Description", "Recipe", "Source"]

  data = archive_json.keys.sort.map do |pkgname|
    versions, deps, descr, pkgtype = archive_json[pkgname]
    recipe = recipe_json[pkgname]
    version = versions.join('.')
    pkgurl = "packages/#{pkgname}-#{version}." + (pkgtype == "single" ? "el" : "tar")
    recipe_url = "https://github.com/milkypostman/melpa/blob/master/recipes/#{pkgname}"
    source = 'unknown'
    if descr =~ /(.*?)(\s*-\*-.*?)?\s*\[source:\s*(\w+)\]\s*/
      descr, source = $1, $3
    end

    case source
    when 'github' then source_url = "https://github.com/#{recipe['repo']}"
    when 'wiki'   then source_url = recipe.key?('files') ? nil : "http://www.emacswiki.org/emacs/#{pkgname}.el"
    else source_url = nil
    end

    ["<a name=\"#{pkgname}\"></a>[#{pkgname}](#{pkgurl})", version, descr, "[recipe](#{recipe_url})", source_url ? "[#{source}](#{source_url})" : ""]
  end

  colwidth = [0,0,0,0, 9]

  data.map do |row|
    row.to_enum(:each_with_index).map do |e,i|
      colwidth[i] = [colwidth[i], e.length].max
    end
  end
%>
<%= "## Current List of #{data.size} Packages" %>
<%=
    headers.to_enum(:each_with_index).map{
      |h,i| h + " "*(colwidth[i]-h.length) }.join(" ")
%>
<%= colwidth.map{ |w| "-"*w }.join(" ") %>
<%=
    data.map{ |row|
    row.to_enum(:each_with_index).map{ |c,i|
       c + " "*(colwidth[i]-c.length)
       }.join(" ")
    }.join("\n")
%>


## Installing

To add the repository put this before the call to `package-initialize`
in your `init.el` file.

<!-- <script src="https://gist.github.com/1679158.js"> </script> -->

    (add-to-list 'package-archives
                 '("melpa" . "http://melpa.milkbox.net/packages/") t)
    

Please read about [known issues](#known-issues) below before
attempting to install multiple packages at once.

### Customizations

There is currently no way in `package.el` to exclude or include versions.  So to remedy this there is a `melpa.el` package--available in MELPA--that will allow you to enable only certain packages or exclude certain packages.  You can install the package manually by pasting this into yoru `*scratch*` buffer and evaluating it.

    (progn
      (switch-to-buffer
       (url-retrieve-synchronously
        "https://raw.github.com/milkypostman/melpa/master/melpa.el"))
      (package-install-from-buffer  (package-buffer-info) 'single))


You can then customize two variables:

`package-archive-enable-alist`
:   Optional Alist of enabled packages used by `package-filter'.
    The format is (ARCHIVE . PACKAGE ...), where ARCHIVE is a string
    matching an archive name in `package-archives', PACKAGE is a
    symbol of a package in ARCHIVE to enable.
    
    If no ARCHIVE exists in the alist, all packages are enabled.


`package-archive-exclude-alist`
:   Alist of packages excluded by `package-filter'.
    The format is (ARCHIVE . PACKAGE ...), where ARCHIVE is a string
    matching an archive name in `package-archives', PACKAGE is a
    symbol of a package in that archive to exclude.
    
    Any specified package is excluded regardless of the value of
    `package-archive-enable-alist'



## Known Issues

**Note:** *This fix are included in the `melpa.el` package.*

There is a small bug in Emacs24's `package.el` the order for
dependencies comes out backwards for what I needed. the problem is
patched by some *advice*.
 
<!-- <script src="https://gist.github.com/1679232.js"> </script> -->

    (defadvice package-compute-transaction
      (before
       package-compute-transaction-reverse (package-list requirements)
       activate compile)
      "reverse the requirements"
      (setq requirements (reverse requirements))
      (print requirements))
    
    

## Updating Packages

`package.el` now includes a mechanism to upgrade packages.  After running `package-list-packages`, type *u* (mark Upgradable packages) and then *x* (eXecute the installs and deletions).  When it's done installing all the packages it will ask if you want to delete the obsolete packages and so you can hit *y* (Yes).

If you run into a problem installing or upgrading, you may need to go into your `~/.emacs.d/elpa/` directory and delete packages that are installed multiple times.  This can happen when the install times out (see [Known Issues](#known-issues)).

## Development

[https://github.com/milkypostman/melpa](https://github.com/milkypostman/melpa)

Contributions are welcome.  Currently, the builder only supports
packages using git, subversion, mercurial, and darcs.  This covers
most of the packages that I am interested in.


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