;;; package-x.el --- Package extras
;; Copyright (C) 2007-2012 Free Software Foundation, Inc.
;; Author: Tom Tromey <tromey@redhat.com>
;; Created: 10 Mar 2007
;; Version: 0.9
;; Keywords: tools
;; Package: package
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This file currently contains parts of the package system that many
;; won't need, such as package uploading.
;; To upload to an archive, first set `package-archive-upload-base' to
;; some desired directory. For testing purposes, you can specify any
;; directory you want, but if you want the archive to be accessible to
;; others via http, this is typically a directory in the /var/www tree
;; (possibly one on a remote machine, accessed via Tramp).
;; Then call M-x package-upload-file, which prompts for a file to
;; upload. Alternatively, M-x package-upload-buffer uploads the
;; current buffer, if it's visiting a package file.
;; Once a package is uploaded, users can access it via the Package
;; Menu, by adding the archive to `package-archives'.
;;; Code:
(require 'package)
(defvar gnus-article-buffer)
(defcustom package-archive-upload-base "/path/to/archive"
"The base location of the archive to which packages are uploaded.
This should be an absolute directory name. If the archive is on
another machine, you may specify a remote name in the usual way,
e.g. \"/ssh:foo@example.com:/var/www/packages/\".
See Info node `(emacs)Remote Files'.
Unlike `package-archives', you can't specify a HTTP URL."
:type 'directory
:group 'package
:version "24.1")
(defvar package-update-news-on-upload nil
"Whether uploading a package should also update NEWS and RSS feeds.")
(defun package--encode (string)
"Encode a string by replacing some characters with XML entities."
;; We need a special case for translating "&" to "&".
(let ((index))
(while (setq index (string-match "[&]" string index))
(setq string (replace-match "&" t nil string))
(setq index (1+ index))))
(while (string-match "[<]" string)
(setq string (replace-match "<" t nil string)))
(while (string-match "[>]" string)
(setq string (replace-match ">" t nil string)))
(while (string-match "[']" string)
(setq string (replace-match "'" t nil string)))
(while (string-match "[\"]" string)
(setq string (replace-match """ t nil string)))
string)
(defun package--make-rss-entry (title text archive-url)
(let ((date-string (format-time-string "%a, %d %B %Y %T %z")))
(concat "<item>\n"
"<title>" (package--encode title) "</title>\n"
;; FIXME: should have a link in the web page.
"<link>" archive-url "news.html</link>\n"
"<description>" (package--encode text) "</description>\n"
"<pubDate>" date-string "</pubDate>\n"
"</item>\n")))
(defun package--make-html-entry (title text)
(concat "<li> " (format-time-string "%B %e") " - "
title " - " (package--encode text)
" </li>\n"))
(defun package--update-file (file tag text)
"Update the package archive file named FILE.
FILE should be relative to `package-archive-upload-base'.
TAG is a string that can be found within the file; TEXT is
inserted after its first occurrence in the file."
(setq file (expand-file-name file package-archive-upload-base))
(save-excursion
(let ((old-buffer (find-buffer-visiting file)))
(with-current-buffer (let ((find-file-visit-truename t))
(or old-buffer (find-file-noselect file)))
(goto-char (point-min))
(search-forward tag)
(forward-line)
(insert text)
(let ((file-precious-flag t))
(save-buffer))
(unless old-buffer
(kill-buffer (current-buffer)))))))
(defun package--archive-contents-from-url (archive-url)
"Parse archive-contents file at ARCHIVE-URL.
Return the file contents, as a string, or nil if unsuccessful."
(ignore-errors
(when archive-url
(let* ((buffer (url-retrieve-synchronously
(concat archive-url "archive-contents"))))
(set-buffer buffer)
(package-handle-response)
(re-search-forward "^$" nil 'move)
(forward-char)
(delete-region (point-min) (point))
(prog1 (package-read-from-string
(buffer-substring-no-properties (point-min) (point-max)))
(kill-buffer buffer))))))
(defun package--archive-contents-from-file ()
"Parse the archive-contents at `package-archive-upload-base'"
(let ((file (expand-file-name "archive-contents"
package-archive-upload-base)))
(if (not (file-exists-p file))
;; No existing archive-contents means a new archive.
(list package-archive-version)
(let ((dont-kill (find-buffer-visiting file)))
(with-current-buffer (let ((find-file-visit-truename t))
(find-file-noselect file))
(prog1
(package-read-from-string
(buffer-substring-no-properties (point-min) (point-max)))
(unless dont-kill
(kill-buffer (current-buffer)))))))))
(defun package-maint-add-news-item (title description archive-url)
"Add a news item to the webpages associated with the package archive.
TITLE is the title of the news item.
DESCRIPTION is the text of the news item."
(interactive "sTitle: \nsText: ")
(package--update-file "elpa.rss"
"<description>"
(package--make-rss-entry title description archive-url))
(package--update-file "news.html"
"New entries go here"
(package--make-html-entry title description)))
(defun package--update-news (package version description archive-url)
"Update the ELPA web pages when a package is uploaded."
(package-maint-add-news-item (concat package " version " version)
description
archive-url))
(defun package-upload-buffer-internal (pkg-info extension &optional archive-url)
"Upload a package whose contents are in the current buffer.
PKG-INFO is the package info, see `package-buffer-info'.
EXTENSION is the file extension, a string. It can be either
\"el\" or \"tar\".
The upload destination is given by `package-archive-upload-base'.
If its value is invalid, prompt for a directory.
Optional arg ARCHIVE-URL is the URL of the destination archive.
If it is non-nil, compute the new \"archive-contents\" file
starting from the existing \"archive-contents\" at that URL. In
addition, if `package-update-news-on-upload' is non-nil, call
`package--update-news' to add a news item at that URL.
If ARCHIVE-URL is nil, compute the new \"archive-contents\" file
from the \"archive-contents\" at `package-archive-upload-base',
if it exists."
(let ((package-archive-upload-base package-archive-upload-base))
;; Check if `package-archive-upload-base' is valid.
(when (or (not (stringp package-archive-upload-base))
(equal package-archive-upload-base
(car-safe
(get 'package-archive-upload-base 'standard-value))))
(setq package-archive-upload-base
(read-directory-name
"Base directory for package archive: ")))
(unless (file-directory-p package-archive-upload-base)
(if (y-or-n-p (format "%s does not exist; create it? "
package-archive-upload-base))
(make-directory package-archive-upload-base t)
(error "Aborted")))
(save-excursion
(save-restriction
(let* ((file-type (cond
((equal extension "el") 'single)
((equal extension "tar") 'tar)
(t (error "Unknown extension `%s'" extension))))
(file-name (aref pkg-info 0))
(pkg-name (intern file-name))
(requires (aref pkg-info 1))
(desc (if (string= (aref pkg-info 2) "")
(read-string "Description of package: ")
(aref pkg-info 2)))
(pkg-version (aref pkg-info 3))
(commentary (aref pkg-info 4))
(split-version (version-to-list pkg-version))
(pkg-buffer (current-buffer)))
;; Get archive-contents from ARCHIVE-URL if it's non-nil, or
;; from `package-archive-upload-base' otherwise.
(let ((contents (or (package--archive-contents-from-url archive-url)
(package--archive-contents-from-file)))
(new-desc (vector split-version requires desc file-type)))
(if (> (car contents) package-archive-version)
(error "Unrecognized archive version %d" (car contents)))
(let ((elt (assq pkg-name (cdr contents))))
(if elt
(if (version-list-<= split-version
(package-desc-vers (cdr elt)))
(error "New package has smaller version: %s" pkg-version)
(setcdr elt new-desc))
(setq contents (cons (car contents)
(cons (cons pkg-name new-desc)
(cdr contents))))))
;; Now CONTENTS is the updated archive contents. Upload
;; this and the package itself. For now we assume ELPA is
;; writable via file primitives.
(let ((print-level nil)
(print-length nil))
(write-region (concat (pp-to-string contents) "\n")
nil
(expand-file-name "archive-contents"
package-archive-upload-base)))
;; If there is a commentary section, write it.
(when commentary
(write-region commentary nil
(expand-file-name
(concat (symbol-name pkg-name) "-readme.txt")
package-archive-upload-base)))
(set-buffer pkg-buffer)
(write-region (point-min) (point-max)
(expand-file-name
(concat file-name "-" pkg-version "." extension)
package-archive-upload-base)
nil nil nil 'excl)
;; Write a news entry.
(and package-update-news-on-upload
archive-url
(package--update-news (concat file-name "." extension)
pkg-version desc archive-url))
;; special-case "package": write a second copy so that the
;; installer can easily find the latest version.
(if (string= file-name "package")
(write-region (point-min) (point-max)
(expand-file-name
(concat file-name "." extension)
package-archive-upload-base)
nil nil nil 'ask))))))))
(defun package-upload-buffer ()
"Upload the current buffer as a single-file Emacs Lisp package.
If `package-archive-upload-base' does not specify a valid upload
destination, prompt for one."
(interactive)
(save-excursion
(save-restriction
;; Find the package in this buffer.
(let ((pkg-info (package-buffer-info)))
(package-upload-buffer-internal pkg-info "el")))))
(defun package-upload-file (file)
"Upload the Emacs Lisp package FILE to the package archive.
Interactively, prompt for FILE. The package is considered a
single-file package if FILE ends in \".el\", and a multi-file
package if FILE ends in \".tar\".
If `package-archive-upload-base' does not specify a valid upload
destination, prompt for one."
(interactive "fPackage file name: ")
(with-temp-buffer
(insert-file-contents-literally file)
(let ((info (cond
((string-match "\\.tar$" file) (package-tar-file-info file))
((string-match "\\.el$" file) (package-buffer-info))
(t (error "Unrecognized extension `%s'"
(file-name-extension file))))))
(package-upload-buffer-internal info (file-name-extension file)))))
(defun package-gnus-summary-upload ()
"Upload a package contained in the current *Article* buffer.
This should be invoked from the gnus *Summary* buffer."
(interactive)
(with-current-buffer gnus-article-buffer
(package-upload-buffer)))
(provide 'package-x)
;;; package-x.el ends here