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fallback to included fallbacks/package.el if not bundled. Emacs24 inc…

…ludes it; Emacs23 does not
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+;;; package.el --- Simple package system for Emacs
+
+;; Copyright (C) 2007-2011 Free Software Foundation, Inc.
+
+;; Author: Tom Tromey <tromey@redhat.com>
+;; Created: 10 Mar 2007
+;; Version: 0.9
+;; Keywords: tools
+
+;; 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.
+
+;;; Change Log:
+
+;; 2 Apr 2007 - now using ChangeLog file
+;; 15 Mar 2007 - updated documentation
+;; 14 Mar 2007 - Changed how obsolete packages are handled
+;; 13 Mar 2007 - Wrote package-install-from-buffer
+;; 12 Mar 2007 - Wrote package-menu mode
+
+;;; Commentary:
+
+;; The idea behind package.el is to be able to download packages and
+;; install them. Packages are versioned and have versioned
+;; dependencies. Furthermore, this supports built-in packages which
+;; may or may not be newer than user-specified packages. This makes
+;; it possible to upgrade Emacs and automatically disable packages
+;; which have moved from external to core. (Note though that we don't
+;; currently register any of these, so this feature does not actually
+;; work.)
+
+;; A package is described by its name and version. The distribution
+;; format is either a tar file or a single .el file.
+
+;; A tar file should be named "NAME-VERSION.tar". The tar file must
+;; unpack into a directory named after the package and version:
+;; "NAME-VERSION". It must contain a file named "PACKAGE-pkg.el"
+;; which consists of a call to define-package. It may also contain a
+;; "dir" file and the info files it references.
+
+;; A .el file is named "NAME-VERSION.el" in the remote archive, but is
+;; installed as simply "NAME.el" in a directory named "NAME-VERSION".
+
+;; The downloader downloads all dependent packages. By default,
+;; packages come from the official GNU sources, but others may be
+;; added by customizing the `package-archives' alist. Packages get
+;; byte-compiled at install time.
+
+;; At activation time we will set up the load-path and the info path,
+;; and we will load the package's autoloads. If a package's
+;; dependencies are not available, we will not activate that package.
+
+;; Conceptually a package has multiple state transitions:
+;;
+;; * Download. Fetching the package from ELPA.
+;; * Install. Untar the package, or write the .el file, into
+;; ~/.emacs.d/elpa/ directory.
+;; * Byte compile. Currently this phase is done during install,
+;; but we may change this.
+;; * Activate. Evaluate the autoloads for the package to make it
+;; available to the user.
+;; * Load. Actually load the package and run some code from it.
+
+;; Other external functions you may want to use:
+;;
+;; M-x list-packages
+;; Enters a mode similar to buffer-menu which lets you manage
+;; packages. You can choose packages for install (mark with "i",
+;; then "x" to execute) or deletion (not implemented yet), and you
+;; can see what packages are available. This will automatically
+;; fetch the latest list of packages from ELPA.
+;;
+;; M-x package-list-packages-no-fetch
+;; Like package-list-packages, but does not automatically fetch the
+;; new list of packages.
+;;
+;; M-x package-install-from-buffer
+;; Install a package consisting of a single .el file that appears
+;; in the current buffer. This only works for packages which
+;; define a Version header properly; package.el also supports the
+;; extension headers Package-Version (in case Version is an RCS id
+;; or similar), and Package-Requires (if the package requires other
+;; packages).
+;;
+;; M-x package-install-file
+;; Install a package from the indicated file. The package can be
+;; either a tar file or a .el file. A tar file must contain an
+;; appropriately-named "-pkg.el" file; a .el file must be properly
+;; formatted as with package-install-from-buffer.
+
+;;; Thanks:
+;;; (sorted by sort-lines):
+
+;; Jim Blandy <jimb@red-bean.com>
+;; Karl Fogel <kfogel@red-bean.com>
+;; Kevin Ryde <user42@zip.com.au>
+;; Lawrence Mitchell
+;; Michael Olson <mwolson@member.fsf.org>
+;; Sebastian Tennant <sebyte@smolny.plus.com>
+;; Stefan Monnier <monnier@iro.umontreal.ca>
+;; Vinicius Jose Latorre <viniciusjl@ig.com.br>
+;; Phil Hagelberg <phil@hagelb.org>
+
+;;; ToDo:
+
+;; - putting info dirs at the start of the info path means
+;; users see a weird ordering of categories. OTOH we want to
+;; override later entries. maybe emacs needs to enforce
+;; the standard layout?
+;; - put bytecode in a separate directory tree
+;; - perhaps give users a way to recompile their bytecode
+;; or do it automatically when emacs changes
+;; - give users a way to know whether a package is installed ok
+;; - give users a way to view a package's documentation when it
+;; only appears in the .el
+;; - use/extend checkdoc so people can tell if their package will work
+;; - "installed" instead of a blank in the status column
+;; - tramp needs its files to be compiled in a certain order.
+;; how to handle this? fix tramp?
+;; - on emacs 21 we don't kill the -autoloads.el buffer. what about 22?
+;; - maybe we need separate .elc directories for various emacs versions
+;; and also emacs-vs-xemacs. That way conditional compilation can
+;; work. But would this break anything?
+;; - should store the package's keywords in archive-contents, then
+;; let the users filter the package-menu by keyword. See
+;; finder-by-keyword. (We could also let people view the
+;; Commentary, but it isn't clear how useful this is.)
+;; - William Xu suggests being able to open a package file without
+;; installing it
+;; - Interface with desktop.el so that restarting after an install
+;; works properly
+;; - Implement M-x package-upgrade, to upgrade any/all existing packages
+;; - Use hierarchical layout. PKG/etc PKG/lisp PKG/info
+;; ... except maybe lisp?
+;; - It may be nice to have a macro that expands to the package's
+;; private data dir, aka ".../etc". Or, maybe data-directory
+;; needs to be a list (though this would be less nice)
+;; a few packages want this, eg sokoban
+;; - package menu needs:
+;; ability to know which packages are built-in & thus not deletable
+;; it can sometimes print odd results, like 0.3 available but 0.4 active
+;; why is that?
+;; - Allow multiple versions on the server...?
+;; [ why bother? ]
+;; - Don't install a package which will invalidate dependencies overall
+;; - Allow something like (or (>= emacs 21.0) (>= xemacs 21.5))
+;; [ currently thinking, why bother.. KISS ]
+;; - Allow optional package dependencies
+;; then if we require 'bbdb', bbdb-specific lisp in lisp/bbdb
+;; and just don't compile to add to load path ...?
+;; - Have a list of archive URLs? [ maybe there's no point ]
+;; - David Kastrup pointed out on the xemacs list that for GPL it
+;; is friendlier to ship the source tree. We could "support" that
+;; by just having a "src" subdir in the package. This isn't ideal
+;; but it probably is not worth trying to support random source
+;; tree layouts, build schemes, etc.
+;; - Our treatment of the info path is somewhat bogus
+;; - perhaps have an "unstable" tree in ELPA as well as a stable one
+
+;;; Code:
+
+(defgroup package nil
+ "Manager for Emacs Lisp packages."
+ :group 'applications
+ :version "24.1")
+
+;;;###autoload
+(defcustom package-enable-at-startup t
+ "Whether to activate installed packages when Emacs starts.
+If non-nil, packages are activated after reading the init file
+and before `after-init-hook'. Activation is not done if
+`user-init-file' is nil (e.g. Emacs was started with \"-q\").
+
+Even if the value is nil, you can type \\[package-initialize] to
+activate the package system at any time."
+ :type 'boolean
+ :group 'package
+ :version "24.1")
+
+(defcustom package-load-list '(all)
+ "List of packages for `package-initialize' to load.
+Each element in this list should be a list (NAME VERSION), or the
+symbol `all'. The symbol `all' says to load the latest installed
+versions of all packages not specified by other elements.
+
+For an element (NAME VERSION), NAME is a package name (a symbol).
+VERSION should be t, a string, or nil.
+If VERSION is t, all versions are loaded, though obsolete ones
+ will be put in `package-obsolete-alist' and not activated.
+If VERSION is a string, only that version is ever loaded.
+ Any other version, even if newer, is silently ignored.
+ Hence, the package is \"held\" at that version.
+If VERSION is nil, the package is not loaded (it is \"disabled\")."
+ :type '(repeat symbol)
+ :risky t
+ :group 'package
+ :version "24.1")
+
+(defvar Info-directory-list)
+(declare-function info-initialize "info" ())
+(declare-function url-http-parse-response "url-http" ())
+(declare-function lm-header "lisp-mnt" (header))
+(declare-function lm-commentary "lisp-mnt" (&optional file))
+(defvar url-http-end-of-headers)
+
+(defcustom package-archives '(("gnu" . "http://elpa.gnu.org/packages/"))
+ "An alist of archives from which to fetch.
+The default value points to the GNU Emacs package repository.
+
+Each element has the form (ID . LOCATION).
+ ID is an archive name, as a string.
+ LOCATION specifies the base location for the archive.
+ If it starts with \"http:\", it is treated as a HTTP URL;
+ otherwise it should be an absolute directory name.
+ (Other types of URL are currently not supported.)"
+ :type '(alist :key-type (string :tag "Archive name")
+ :value-type (string :tag "URL or directory name"))
+ :risky t
+ :group 'package
+ :version "24.1")
+
+(defconst package-archive-version 1
+ "Version number of the package archive understood by this file.
+Lower version numbers than this will probably be understood as well.")
+
+(defconst package-el-version "1.0"
+ "Version of package.el.")
+
+;; We don't prime the cache since it tends to get out of date.
+(defvar package-archive-contents nil
+ "Cache of the contents of the Emacs Lisp Package Archive.
+This is an alist mapping package names (symbols) to package
+descriptor vectors. These are like the vectors for `package-alist'
+but have extra entries: one which is 'tar for tar packages and
+'single for single-file packages, and one which is the name of
+the archive from which it came.")
+(put 'package-archive-contents 'risky-local-variable t)
+
+(defcustom package-user-dir (locate-user-emacs-file "elpa")
+ "Directory containing the user's Emacs Lisp packages.
+The directory name should be absolute.
+Apart from this directory, Emacs also looks for system-wide
+packages in `package-directory-list'."
+ :type 'directory
+ :risky t
+ :group 'package
+ :version "24.1")
+
+(defcustom package-directory-list
+ ;; Defaults are subdirs named "elpa" in the site-lisp dirs.
+ (let (result)
+ (dolist (f load-path)
+ (and (stringp f)
+ (equal (file-name-nondirectory f) "site-lisp")
+ (push (expand-file-name "elpa" f) result)))
+ (nreverse result))
+ "List of additional directories containing Emacs Lisp packages.
+Each directory name should be absolute.
+
+These directories contain packages intended for system-wide; in
+contrast, `package-user-dir' contains packages for personal use."
+ :type '(repeat directory)
+ :risky t
+ :group 'package
+ :version "24.1")
+
+;; The value is precomputed in finder-inf.el, but don't load that
+;; until it's needed (i.e. when `package-intialize' is called).
+(defvar package--builtins nil
+ "Alist of built-in packages.
+The actual value is initialized by loading the library
+`finder-inf'; this is not done until it is needed, e.g. by the
+function `package-built-in-p'.
+
+Each element has the form (PKG . DESC), where PKG is a package
+name (a symbol) and DESC is a vector that describes the package.
+The vector DESC has the form [VERSION REQS DOCSTRING].
+ VERSION is a version list.
+ REQS is a list of packages (symbols) required by the package.
+ DOCSTRING is a brief description of the package.")
+(put 'package--builtins 'risky-local-variable t)
+
+(defvar package-alist nil
+ "Alist of all packages available for activation.
+Each element has the form (PKG . DESC), where PKG is a package
+name (a symbol) and DESC is a vector that describes the package.
+
+The vector DESC has the form [VERSION REQS DOCSTRING].
+ VERSION is a version list.
+ REQS is a list of packages (symbols) required by the package.
+ DOCSTRING is a brief description of the package.
+
+This variable is set automatically by `package-load-descriptor',
+called via `package-initialize'. To change which packages are
+loaded and/or activated, customize `package-load-list'.")
+(put 'package-archive-contents 'risky-local-variable t)
+
+(defvar package-activated-list nil
+ "List of the names of currently activated packages.")
+(put 'package-activated-list 'risky-local-variable t)
+
+(defvar package-obsolete-alist nil
+ "Representation of obsolete packages.
+Like `package-alist', but maps package name to a second alist.
+The inner alist is keyed by version.")
+(put 'package-obsolete-alist 'risky-local-variable t)
+
+(defconst package-subdirectory-regexp
+ "\\`\\([^.].*?\\)-\\([0-9]+\\(?:[.][0-9]+\\|\\(?:pre\\|beta\\|alpha\\)[0-9]+\\)*\\)\\'"
+ "Regular expression matching the name of a package subdirectory.
+The first subexpression is the package name.
+The second subexpression is the version string.")
+
+(defun package-version-join (vlist)
+ "Return the version string corresponding to the list VLIST.
+This is, approximately, the inverse of `version-to-list'.
+\(Actually, it returns only one of the possible inverses, since
+`version-to-list' is a many-to-one operation.)"
+ (if (null vlist)
+ ""
+ (let ((str-list (list "." (int-to-string (car vlist)))))
+ (dolist (num (cdr vlist))
+ (cond
+ ((>= num 0)
+ (push (int-to-string num) str-list)
+ (push "." str-list))
+ ((< num -3)
+ (error "Invalid version list `%s'" vlist))
+ (t
+ ;; pre, or beta, or alpha
+ (cond ((equal "." (car str-list))
+ (pop str-list))
+ ((not (string-match "[0-9]+" (car str-list)))
+ (error "Invalid version list `%s'" vlist)))
+ (push (cond ((= num -1) "pre")
+ ((= num -2) "beta")
+ ((= num -3) "alpha"))
+ str-list))))
+ (if (equal "." (car str-list))
+ (pop str-list))
+ (apply 'concat (nreverse str-list)))))
+
+(defun package-strip-version (dirname)
+ "Strip the version from a combined package name and version.
+E.g., if given \"quux-23.0\", will return \"quux\""
+ (if (string-match package-subdirectory-regexp dirname)
+ (match-string 1 dirname)))
+
+(defun package-load-descriptor (dir package)
+ "Load the description file in directory DIR for package PACKAGE.
+Here, PACKAGE is a string of the form NAME-VER, where NAME is the
+package name and VER is its version."
+ (let* ((pkg-dir (expand-file-name package dir))
+ (pkg-file (expand-file-name
+ (concat (package-strip-version package) "-pkg")
+ pkg-dir)))
+ (when (and (file-directory-p pkg-dir)
+ (file-exists-p (concat pkg-file ".el")))
+ (load pkg-file nil t))))
+
+(defun package-load-all-descriptors ()
+ "Load descriptors for installed Emacs Lisp packages.
+This looks for package subdirectories in `package-user-dir' and
+`package-directory-list'. The variable `package-load-list'
+controls which package subdirectories may be loaded.
+
+In each valid package subdirectory, this function loads the
+description file containing a call to `define-package', which
+updates `package-alist' and `package-obsolete-alist'."
+ (let ((all (memq 'all package-load-list))
+ name version force)
+ (dolist (dir (cons package-user-dir package-directory-list))
+ (when (file-directory-p dir)
+ (dolist (subdir (directory-files dir))
+ (when (and (file-directory-p (expand-file-name subdir dir))
+ (string-match package-subdirectory-regexp subdir))
+ (setq name (intern (match-string 1 subdir))
+ version (match-string 2 subdir)
+ force (assq name package-load-list))
+ (when (cond
+ ((null force)
+ all) ; not in package-load-list
+ ((null (setq force (cadr force)))
+ nil) ; disabled
+ ((eq force t)
+ t)
+ ((stringp force) ; held
+ (version-list-= (version-to-list version)
+ (version-to-list force)))
+ (t
+ (error "Invalid element in `package-load-list'")))
+ (package-load-descriptor dir subdir))))))))
+
+(defsubst package-desc-vers (desc)
+ "Extract version from a package description vector."
+ (aref desc 0))
+
+(defsubst package-desc-reqs (desc)
+ "Extract requirements from a package description vector."
+ (aref desc 1))
+
+(defsubst package-desc-doc (desc)
+ "Extract doc string from a package description vector."
+ (aref desc 2))
+
+(defsubst package-desc-kind (desc)
+ "Extract the kind of download from an archive package description vector."
+ (aref desc 3))
+
+(defun package--dir (name version)
+ "Return the directory where a package is installed, or nil if none.
+NAME and VERSION are both strings."
+ (let* ((subdir (concat name "-" version))
+ (dir-list (cons package-user-dir package-directory-list))
+ pkg-dir)
+ (while dir-list
+ (let ((subdir-full (expand-file-name subdir (car dir-list))))
+ (if (file-directory-p subdir-full)
+ (setq pkg-dir subdir-full
+ dir-list nil)
+ (setq dir-list (cdr dir-list)))))
+ pkg-dir))
+
+(defun package-activate-1 (package pkg-vec)
+ (let* ((name (symbol-name package))
+ (version-str (package-version-join (package-desc-vers pkg-vec)))
+ (pkg-dir (package--dir name version-str)))
+ (unless pkg-dir
+ (error "Internal error: unable to find directory for `%s-%s'"
+ name version-str))
+ ;; Add info node.
+ (when (file-exists-p (expand-file-name "dir" pkg-dir))
+ ;; FIXME: not the friendliest, but simple.
+ (require 'info)
+ (info-initialize)
+ (push pkg-dir Info-directory-list))
+ ;; Add to load path, add autoloads, and activate the package.
+ (push pkg-dir load-path)
+ (load (expand-file-name (concat name "-autoloads") pkg-dir) nil t)
+ (push package package-activated-list)
+ ;; Don't return nil.
+ t))
+
+(defun package-built-in-p (package &optional version)
+ "Return true if PACKAGE, of VERSION or newer, is built-in to Emacs."
+ (require 'finder-inf nil t) ; For `package--builtins'.
+ (let ((elt (assq package package--builtins)))
+ (and elt (version-list-<= version (package-desc-vers (cdr elt))))))
+
+;; This function goes ahead and activates a newer version of a package
+;; if an older one was already activated. This is not ideal; we'd at
+;; least need to check to see if the package has actually been loaded,
+;; and not merely activated.
+(defun package-activate (package version)
+ "Activate package PACKAGE, of version VERSION or newer.
+If PACKAGE has any dependencies, recursively activate them.
+Return nil if the package could not be activated."
+ (let ((pkg-vec (cdr (assq package package-alist)))
+ available-version found)
+ ;; Check if PACKAGE is available in `package-alist'.
+ (when pkg-vec
+ (setq available-version (package-desc-vers pkg-vec)
+ found (version-list-<= version available-version)))
+ (cond
+ ;; If no such package is found, maybe it's built-in.
+ ((null found)
+ (package-built-in-p package version))
+ ;; If the package is already activated, just return t.
+ ((memq package package-activated-list)
+ t)
+ ;; Otherwise, proceed with activation.
+ (t
+ (let ((fail (catch 'dep-failure
+ ;; Activate its dependencies recursively.
+ (dolist (req (package-desc-reqs pkg-vec))
+ (unless (package-activate (car req) (cadr req))
+ (throw 'dep-failure req))))))
+ (if fail
+ (warn "Unable to activate package `%s'.
+Required package `%s-%s' is unavailable"
+ package (car fail) (package-version-join (cadr fail)))
+ ;; If all goes well, activate the package itself.
+ (package-activate-1 package pkg-vec)))))))
+
+(defun package-mark-obsolete (package pkg-vec)
+ "Put package on the obsolete list, if not already there."
+ (let ((elt (assq package package-obsolete-alist)))
+ (if elt
+ ;; If this obsolete version does not exist in the list, update
+ ;; it the list.
+ (unless (assoc (package-desc-vers pkg-vec) (cdr elt))
+ (setcdr elt (cons (cons (package-desc-vers pkg-vec) pkg-vec)
+ (cdr elt))))
+ ;; Make a new association.
+ (push (cons package (list (cons (package-desc-vers pkg-vec)
+ pkg-vec)))
+ package-obsolete-alist))))
+
+(defun define-package (name-string version-string
+ &optional docstring requirements
+ &rest extra-properties)
+ "Define a new package.
+NAME-STRING is the name of the package, as a string.
+VERSION-STRING is the version of the package, as a list of
+integers of the form produced by `version-to-list'.
+DOCSTRING is a short description of the package, a string.
+REQUIREMENTS is a list of dependencies on other packages.
+Each requirement is of the form (OTHER-PACKAGE \"VERSION\").
+
+EXTRA-PROPERTIES is currently unused."
+ (let* ((name (intern name-string))
+ (version (version-to-list version-string))
+ (new-pkg-desc
+ (cons name
+ (vector version
+ (mapcar
+ (lambda (elt)
+ (list (car elt)
+ (version-to-list (car (cdr elt)))))
+ requirements)
+ docstring)))
+ (old-pkg (assq name package-alist)))
+ (cond
+ ;; If there's no old package, just add this to `package-alist'.
+ ((null old-pkg)
+ (push new-pkg-desc package-alist))
+ ((version-list-< (package-desc-vers (cdr old-pkg)) version)
+ ;; Remove the old package and declare it obsolete.
+ (package-mark-obsolete name (cdr old-pkg))
+ (setq package-alist (cons new-pkg-desc
+ (delq old-pkg package-alist))))
+ ;; You can have two packages with the same version, e.g. one in
+ ;; the system package directory and one in your private
+ ;; directory. We just let the first one win.
+ ((not (version-list-= (package-desc-vers (cdr old-pkg)) version))
+ ;; The package is born obsolete.
+ (package-mark-obsolete name (cdr new-pkg-desc))))))
+
+;; From Emacs 22.
+(defun package-autoload-ensure-default-file (file)
+ "Make sure that the autoload file FILE exists and if not create it."
+ (unless (file-exists-p file)
+ (write-region
+ (concat ";;; " (file-name-nondirectory file)
+ " --- automatically extracted autoloads\n"
+ ";;\n"
+ ";;; Code:\n\n"
+ " \n;; Local Variables:\n"
+ ";; version-control: never\n"
+ ";; no-byte-compile: t\n"
+ ";; no-update-autoloads: t\n"
+ ";; End:\n"
+ ";;; " (file-name-nondirectory file)
+ " ends here\n")
+ nil file))
+ file)
+
+(defun package-generate-autoloads (name pkg-dir)
+ (let* ((auto-name (concat name "-autoloads.el"))
+ (ignore-name (concat name "-pkg.el"))
+ (generated-autoload-file (expand-file-name auto-name pkg-dir))
+ (version-control 'never))
+ (require 'autoload)
+ (unless (fboundp 'autoload-ensure-default-file)
+ (package-autoload-ensure-default-file generated-autoload-file))
+ (update-directory-autoloads pkg-dir)))
+
+(defun package-untar-buffer ()
+ "Untar the current buffer.
+This uses `tar-untar-buffer' if it is available.
+Otherwise it uses an external `tar' program.
+`default-directory' should be set by the caller."
+ (require 'tar-mode)
+ (if (fboundp 'tar-untar-buffer)
+ (progn
+ ;; tar-mode messes with narrowing, so we just let it have the
+ ;; whole buffer to play with.
+ (delete-region (point-min) (point))
+ (tar-mode)
+ (tar-untar-buffer))
+ ;; FIXME: check the result.
+ (call-process-region (point) (point-max) "tar" nil '(nil nil) nil
+ "xf" "-")))
+
+(defun package-unpack (name version)
+ (let ((pkg-dir (expand-file-name (concat (symbol-name name) "-" version)
+ package-user-dir)))
+ (make-directory package-user-dir t)
+ ;; FIXME: should we delete PKG-DIR if it exists?
+ (let* ((default-directory (file-name-as-directory package-user-dir)))
+ (package-untar-buffer)
+ (package-generate-autoloads (symbol-name name) pkg-dir)
+ (let ((load-path (cons pkg-dir load-path)))
+ (byte-recompile-directory pkg-dir 0 t)))))
+
+(defun package--write-file-no-coding (file-name)
+ (let ((buffer-file-coding-system 'no-conversion))
+ (write-region (point-min) (point-max) file-name)))
+
+(defun package-unpack-single (file-name version desc requires)
+ "Install the contents of the current buffer as a package."
+ ;; Special case "package".
+ (if (string= file-name "package")
+ (package--write-file-no-coding
+ (expand-file-name (concat file-name ".el") package-user-dir))
+ (let* ((pkg-dir (expand-file-name (concat file-name "-"
+ (package-version-join
+ (version-to-list version)))
+ package-user-dir))
+ (el-file (expand-file-name (concat file-name ".el") pkg-dir))
+ (pkg-file (expand-file-name (concat file-name "-pkg.el") pkg-dir)))
+ (make-directory pkg-dir t)
+ (package--write-file-no-coding el-file)
+ (let ((print-level nil)
+ (print-length nil))
+ (write-region
+ (concat
+ (prin1-to-string
+ (list 'define-package
+ file-name
+ version
+ desc
+ (list 'quote
+ ;; Turn version lists into string form.
+ (mapcar
+ (lambda (elt)
+ (list (car elt)
+ (package-version-join (cadr elt))))
+ requires))))
+ "\n")
+ nil
+ pkg-file
+ nil nil nil 'excl))
+ (package-generate-autoloads file-name pkg-dir)
+ (let ((load-path (cons pkg-dir load-path)))
+ (byte-recompile-directory pkg-dir 0 t)))))
+
+(defmacro package--with-work-buffer (location file &rest body)
+ "Run BODY in a buffer containing the contents of FILE at LOCATION.
+LOCATION is the base location of a package archive, and should be
+one of the URLs (or file names) specified in `package-archives'.
+FILE is the name of a file relative to that base location.
+
+This macro retrieves FILE from LOCATION into a temporary buffer,
+and evaluates BODY while that buffer is current. This work
+buffer is killed afterwards. Return the last value in BODY."
+ `(let* ((http (string-match "\\`http:" ,location))
+ (buffer
+ (if http
+ (url-retrieve-synchronously (concat ,location ,file))
+ (generate-new-buffer "*package work buffer*"))))
+ (prog1
+ (with-current-buffer buffer
+ (if http
+ (progn (package-handle-response)
+ (re-search-forward "^$" nil 'move)
+ (forward-char)
+ (delete-region (point-min) (point)))
+ (unless (file-name-absolute-p ,location)
+ (error "Archive location %s is not an absolute file name"
+ ,location))
+ (insert-file-contents (expand-file-name ,file ,location)))
+ ,@body)
+ (kill-buffer buffer))))
+
+(defun package-handle-response ()
+ "Handle the response from a `url-retrieve-synchronously' call.
+Parse the HTTP response and throw if an error occurred.
+The url package seems to require extra processing for this.
+This should be called in a `save-excursion', in the download buffer.
+It will move point to somewhere in the headers."
+ ;; We assume HTTP here.
+ (require 'url-http)
+ (let ((response (url-http-parse-response)))
+ (when (or (< response 200) (>= response 300))
+ (error "Error during download request:%s"
+ (buffer-substring-no-properties (point) (progn
+ (end-of-line)
+ (point)))))))
+
+(defun package-download-single (name version desc requires)
+ "Download and install a single-file package."
+ (let ((location (package-archive-base name))
+ (file (concat (symbol-name name) "-" version ".el")))
+ (package--with-work-buffer location file
+ (package-unpack-single (symbol-name name) version desc requires))))
+
+(defun package-download-tar (name version)
+ "Download and install a tar package."
+ (let ((location (package-archive-base name))
+ (file (concat (symbol-name name) "-" version ".tar")))
+ (package--with-work-buffer location file
+ (package-unpack name version))))
+
+(defun package-installed-p (package &optional min-version)
+ "Return true if PACKAGE, of VERSION or newer, is installed.
+Built-in packages also qualify."
+ (let ((pkg-desc (assq package package-alist)))
+ (if pkg-desc
+ (version-list-<= min-version
+ (package-desc-vers (cdr pkg-desc)))
+ ;; Also check built-in packages.
+ (package-built-in-p package min-version))))
+
+(defun package-compute-transaction (package-list requirements)
+ "Return a list of packages to be installed, including PACKAGE-LIST.
+PACKAGE-LIST should be a list of package names (symbols).
+
+REQUIREMENTS should be a list of additional requirements; each
+element in this list should have the form (PACKAGE VERSION),
+where PACKAGE is a package name and VERSION is the required
+version of that package (as a list).
+
+This function recursively computes the requirements of the
+packages in REQUIREMENTS, and returns a list of all the packages
+that must be installed. Packages that are already installed are
+not included in this list."
+ (dolist (elt requirements)
+ (let* ((next-pkg (car elt))
+ (next-version (cadr elt)))
+ (unless (package-installed-p next-pkg next-version)
+ ;; A package is required, but not installed. It might also be
+ ;; blocked via `package-load-list'.
+ (let ((pkg-desc (assq next-pkg package-archive-contents))
+ hold)
+ (when (setq hold (assq next-pkg package-load-list))
+ (setq hold (cadr hold))
+ (cond ((eq hold nil)
+ (error "Required package '%s' is disabled"
+ (symbol-name next-pkg)))
+ ((null (stringp hold))
+ (error "Invalid element in `package-load-list'"))
+ ((version-list-< (version-to-list hold) next-version)
+ (error "Package `%s' held at version %s, \
+but version %s required"
+ (symbol-name next-pkg) hold
+ (package-version-join next-version)))))
+ (unless pkg-desc
+ (error "Package `%s-%s' is unavailable"
+ (symbol-name next-pkg)
+ (package-version-join next-version)))
+ (unless (version-list-<= next-version
+ (package-desc-vers (cdr pkg-desc)))
+ (error
+ "Need package `%s-%s', but only %s is available"
+ (symbol-name next-pkg) (package-version-join next-version)
+ (package-version-join (package-desc-vers (cdr pkg-desc)))))
+ ;; Only add to the transaction if we don't already have it.
+ (unless (memq next-pkg package-list)
+ (push next-pkg package-list))
+ (setq package-list
+ (package-compute-transaction package-list
+ (package-desc-reqs
+ (cdr pkg-desc))))))))
+ package-list)
+
+(defun package-read-from-string (str)
+ "Read a Lisp expression from STR.
+Signal an error if the entire string was not used."
+ (let* ((read-data (read-from-string str))
+ (more-left
+ (condition-case nil
+ ;; The call to `ignore' suppresses a compiler warning.
+ (progn (ignore (read-from-string
+ (substring str (cdr read-data))))
+ t)
+ (end-of-file nil))))
+ (if more-left
+ (error "Can't read whole string")
+ (car read-data))))
+
+(defun package--read-archive-file (file)
+ "Re-read archive file FILE, if it exists.
+Will return the data from the file, or nil if the file does not exist.
+Will throw an error if the archive version is too new."
+ (let ((filename (expand-file-name file package-user-dir)))
+ (when (file-exists-p filename)
+ (with-temp-buffer
+ (insert-file-contents-literally filename)
+ (let ((contents (read (current-buffer))))
+ (if (> (car contents) package-archive-version)
+ (error "Package archive version %d is higher than %d"
+ (car contents) package-archive-version))
+ (cdr contents))))))
+
+(defun package-read-all-archive-contents ()
+ "Re-read `archive-contents', if it exists.
+If successful, set `package-archive-contents'."
+ (setq package-archive-contents nil)
+ (dolist (archive package-archives)
+ (package-read-archive-contents (car archive))))
+
+(defun package-read-archive-contents (archive)
+ "Re-read archive contents for ARCHIVE.
+If successful, set the variable `package-archive-contents'.
+If the archive version is too new, signal an error."
+ ;; Version 1 of 'archive-contents' is identical to our internal
+ ;; representation.
+ (let* ((dir (concat "archives/" archive))
+ (contents-file (concat dir "/archive-contents"))
+ contents)
+ (when (setq contents (package--read-archive-file contents-file))
+ (dolist (package contents)
+ (package--add-to-archive-contents package archive)))))
+
+(defun package--add-to-archive-contents (package archive)
+ "Add the PACKAGE from the given ARCHIVE if necessary.
+Also, add the originating archive to the end of the package vector."
+ (let* ((name (car package))
+ (version (aref (cdr package) 0))
+ (entry (cons (car package)
+ (vconcat (cdr package) (vector archive))))
+ (existing-package (cdr (assq name package-archive-contents))))
+ (when (or (not existing-package)
+ (version-list-< (aref existing-package 0) version))
+ (add-to-list 'package-archive-contents entry))))
+
+(defun package-download-transaction (package-list)
+ "Download and install all the packages in PACKAGE-LIST.
+PACKAGE-LIST should be a list of package names (symbols).
+This function assumes that all package requirements in
+PACKAGE-LIST are satisfied, i.e. that PACKAGE-LIST is computed
+using `package-compute-transaction'."
+ (dolist (elt package-list)
+ (let* ((desc (cdr (assq elt package-archive-contents)))
+ ;; As an exception, if package is "held" in
+ ;; `package-load-list', download the held version.
+ (hold (cadr (assq elt package-load-list)))
+ (v-string (or (and (stringp hold) hold)
+ (package-version-join (package-desc-vers desc))))
+ (kind (package-desc-kind desc)))
+ (cond
+ ((eq kind 'tar)
+ (package-download-tar elt v-string))
+ ((eq kind 'single)
+ (package-download-single elt v-string
+ (package-desc-doc desc)
+ (package-desc-reqs desc)))
+ (t
+ (error "Unknown package kind: %s" (symbol-name kind)))))))
+
+;;;###autoload
+(defun package-install (name)
+ "Install the package named NAME.
+Interactively, prompt for the package name.
+The package is found on one of the archives in `package-archives'."
+ (interactive
+ (list (intern (completing-read "Install package: "
+ (mapcar (lambda (elt)
+ (cons (symbol-name (car elt))
+ nil))
+ package-archive-contents)
+ nil t))))
+ (let ((pkg-desc (assq name package-archive-contents)))
+ (unless pkg-desc
+ (error "Package `%s' is not available for installation"
+ (symbol-name name)))
+ (package-download-transaction
+ (package-compute-transaction (list name)
+ (package-desc-reqs (cdr pkg-desc)))))
+ ;; Try to activate it.
+ (package-initialize))
+
+(defun package-strip-rcs-id (str)
+ "Strip RCS version ID from the version string STR.
+If the result looks like a dotted numeric version, return it.
+Otherwise return nil."
+ (when str
+ (when (string-match "\\`[ \t]*[$]Revision:[ \t]+" str)
+ (setq str (substring str (match-end 0))))
+ (condition-case nil
+ (if (version-to-list str)
+ str)
+ (error nil))))
+
+(defun package-buffer-info ()
+ "Return a vector describing the package in the current buffer.
+The vector has the form
+
+ [FILENAME REQUIRES DESCRIPTION VERSION COMMENTARY]
+
+FILENAME is the file name, a string, sans the \".el\" extension.
+REQUIRES is a requires list, or nil.
+DESCRIPTION is the package description, a string.
+VERSION is the version, a string.
+COMMENTARY is the commentary section, a string, or nil if none.
+
+If the buffer does not contain a conforming package, signal an
+error. If there is a package, narrow the buffer to the file's
+boundaries."
+ (goto-char (point-min))
+ (unless (re-search-forward "^;;; \\([^ ]*\\)\\.el --- \\(.*\\)$" nil t)
+ (error "Packages lacks a file header"))
+ (let ((file-name (match-string-no-properties 1))
+ (desc (match-string-no-properties 2))
+ (start (line-beginning-position)))
+ (unless (search-forward (concat ";;; " file-name ".el ends here"))
+ (error "Package lacks a terminating comment"))
+ ;; Try to include a trailing newline.
+ (forward-line)
+ (narrow-to-region start (point))
+ (require 'lisp-mnt)
+ ;; Use some headers we've invented to drive the process.
+ (let* ((requires-str (lm-header "package-requires"))
+ (requires (if requires-str
+ (package-read-from-string requires-str)))
+ ;; Prefer Package-Version; if defined, the package author
+ ;; probably wants us to use it. Otherwise try Version.
+ (pkg-version
+ (or (package-strip-rcs-id (lm-header "package-version"))
+ (package-strip-rcs-id (lm-header "version"))))
+ (commentary (lm-commentary)))
+ (unless pkg-version
+ (error
+ "Package lacks a \"Version\" or \"Package-Version\" header"))
+ ;; Turn string version numbers into list form.
+ (setq requires
+ (mapcar
+ (lambda (elt)
+ (list (car elt)
+ (version-to-list (car (cdr elt)))))
+ requires))
+ (vector file-name requires desc pkg-version commentary))))
+
+(defun package-tar-file-info (file)
+ "Find package information for a tar file.
+FILE is the name of the tar file to examine.
+The return result is a vector like `package-buffer-info'."
+ (let ((default-directory (file-name-directory file))
+ (file (file-name-nondirectory file)))
+ (unless (string-match "^\\(.+\\)-\\([0-9.]+\\)\\.tar$" file)
+ (error "Invalid package name `%s'" file))
+ (let* ((pkg-name (match-string-no-properties 1 file))
+ (pkg-version (match-string-no-properties 2 file))
+ ;; Extract the package descriptor.
+ (pkg-def-contents (shell-command-to-string
+ ;; Requires GNU tar.
+ (concat "tar -xOf " file " "
+
+ pkg-name "-" pkg-version "/"
+ pkg-name "-pkg.el")))
+ (pkg-def-parsed (package-read-from-string pkg-def-contents)))
+ (unless (eq (car pkg-def-parsed) 'define-package)
+ (error "No `define-package' sexp is present in `%s-pkg.el'" pkg-name))
+ (let ((name-str (nth 1 pkg-def-parsed))
+ (version-string (nth 2 pkg-def-parsed))
+ (docstring (nth 3 pkg-def-parsed))
+ (requires (nth 4 pkg-def-parsed))
+ (readme (shell-command-to-string
+ ;; Requires GNU tar.
+ (concat "tar -xOf " file " "
+ pkg-name "-" pkg-version "/README"))))
+ (unless (equal pkg-version version-string)
+ (error "Package has inconsistent versions"))
+ (unless (equal pkg-name name-str)
+ (error "Package has inconsistent names"))
+ ;; Kind of a hack.
+ (if (string-match ": Not found in archive" readme)
+ (setq readme nil))
+ ;; Turn string version numbers into list form.
+ (if (eq (car requires) 'quote)
+ (setq requires (car (cdr requires))))
+ (setq requires
+ (mapcar (lambda (elt)
+ (list (car elt)
+ (version-to-list (cadr elt))))
+ requires))
+ (vector pkg-name requires docstring version-string readme)))))
+
+;;;###autoload
+(defun package-install-from-buffer (pkg-info type)
+ "Install a package from the current buffer.
+When called interactively, the current buffer is assumed to be a
+single .el file that follows the packaging guidelines; see info
+node `(elisp)Packaging'.
+
+When called from Lisp, PKG-INFO is a vector describing the
+information, of the type returned by `package-buffer-info'; and
+TYPE is the package type (either `single' or `tar')."
+ (interactive (list (package-buffer-info) 'single))
+ (save-excursion
+ (save-restriction
+ (let* ((file-name (aref pkg-info 0))
+ (requires (aref pkg-info 1))
+ (desc (if (string= (aref pkg-info 2) "")
+ "No description available."
+ (aref pkg-info 2)))
+ (pkg-version (aref pkg-info 3)))
+ ;; Download and install the dependencies.
+ (let ((transaction (package-compute-transaction nil requires)))
+ (package-download-transaction transaction))
+ ;; Install the package itself.
+ (cond
+ ((eq type 'single)
+ (package-unpack-single file-name pkg-version desc requires))
+ ((eq type 'tar)
+ (package-unpack (intern file-name) pkg-version))
+ (t
+ (error "Unknown type: %s" (symbol-name type))))
+ ;; Try to activate it.
+ (package-initialize)))))
+
+;;;###autoload
+(defun package-install-file (file)
+ "Install a package from a file.
+The file can either be a tar file or an Emacs Lisp file."
+ (interactive "fPackage file name: ")
+ (with-temp-buffer
+ (insert-file-contents-literally file)
+ (cond
+ ((string-match "\\.el$" file)
+ (package-install-from-buffer (package-buffer-info) 'single))
+ ((string-match "\\.tar$" file)
+ (package-install-from-buffer (package-tar-file-info file) 'tar))
+ (t (error "Unrecognized extension `%s'" (file-name-extension file))))))
+
+(defun package-delete (name version)
+ (let ((dir (package--dir name version)))
+ (if (string-equal (file-name-directory dir)
+ (file-name-as-directory
+ (expand-file-name package-user-dir)))
+ (progn
+ (delete-directory dir t t)
+ (message "Package `%s-%s' deleted." name version))
+ ;; Don't delete "system" packages
+ (error "Package `%s-%s' is a system package, not deleting"
+ name version))))
+
+(defun package-archive-base (name)
+ "Return the archive containing the package NAME."
+ (let ((desc (cdr (assq (intern-soft name) package-archive-contents))))
+ (cdr (assoc (aref desc (- (length desc) 1)) package-archives))))
+
+(defun package--download-one-archive (archive file)
+ "Retrieve an archive file FILE from ARCHIVE, and cache it.
+ARCHIVE should be a cons cell of the form (NAME . LOCATION),
+similar to an entry in `package-alist'. Save the cached copy to
+\"archives/NAME/archive-contents\" in `package-user-dir'."
+ (let* ((dir (expand-file-name "archives" package-user-dir))
+ (dir (expand-file-name (car archive) dir)))
+ (package--with-work-buffer (cdr archive) file
+ ;; Read the retrieved buffer to make sure it is valid (e.g. it
+ ;; may fetch a URL redirect page).
+ (when (listp (read buffer))
+ (make-directory dir t)
+ (setq buffer-file-name (expand-file-name file dir))
+ (let ((version-control 'never))
+ (save-buffer))))))
+
+(defun package-refresh-contents ()
+ "Download the ELPA archive description if needed.
+This informs Emacs about the latest versions of all packages, and
+makes them available for download."
+ (interactive)
+ (unless (file-exists-p package-user-dir)
+ (make-directory package-user-dir t))
+ (dolist (archive package-archives)
+ (condition-case-no-debug nil
+ (package--download-one-archive archive "archive-contents")
+ (error (message "Failed to download `%s' archive."
+ (car archive)))))
+ (package-read-all-archive-contents))
+
+(defvar package--initialized nil)
+
+;;;###autoload
+(defun package-initialize (&optional no-activate)
+ "Load Emacs Lisp packages, and activate them.
+The variable `package-load-list' controls which packages to load.
+If optional arg NO-ACTIVATE is non-nil, don't activate packages."
+ (interactive)
+ (setq package-alist nil
+ package-obsolete-alist nil)
+ (package-load-all-descriptors)
+ (package-read-all-archive-contents)
+ (unless no-activate
+ (dolist (elt package-alist)
+ (package-activate (car elt) (package-desc-vers (cdr elt)))))
+ (setq package--initialized t))
+
+
+;;;; Package description buffer.
+
+;;;###autoload
+(defun describe-package (package)
+ "Display the full documentation of PACKAGE (a symbol)."
+ (interactive
+ (let* ((guess (function-called-at-point))
+ packages val)
+ (require 'finder-inf nil t)
+ ;; Load the package list if necessary (but don't activate them).
+ (unless package--initialized
+ (package-initialize t))
+ (setq packages (append (mapcar 'car package-alist)
+ (mapcar 'car package-archive-contents)
+ (mapcar 'car package--builtins)))
+ (unless (memq guess packages)
+ (setq guess nil))
+ (setq packages (mapcar 'symbol-name packages))
+ (setq val
+ (completing-read (if guess
+ (format "Describe package (default %s): "
+ guess)
+ "Describe package: ")
+ packages nil t nil nil guess))
+ (list (if (equal val "") guess (intern val)))))
+ (if (or (null package) (not (symbolp package)))
+ (message "No package specified")
+ (help-setup-xref (list #'describe-package package)
+ (called-interactively-p 'interactive))
+ (with-help-window (help-buffer)
+ (with-current-buffer standard-output
+ (describe-package-1 package)))))
+
+(defun describe-package-1 (package)
+ (require 'lisp-mnt)
+ (let ((package-name (symbol-name package))
+ (built-in (assq package package--builtins))
+ desc pkg-dir reqs version installable)
+ (prin1 package)
+ (princ " is ")
+ (cond
+ ;; Loaded packages are in `package-alist'.
+ ((setq desc (cdr (assq package package-alist)))
+ (setq version (package-version-join (package-desc-vers desc)))
+ (if (setq pkg-dir (package--dir package-name version))
+ (insert "an installed package.\n\n")
+ ;; This normally does not happen.
+ (insert "a deleted package.\n\n")))
+ ;; Available packages are in `package-archive-contents'.
+ ((setq desc (cdr (assq package package-archive-contents)))
+ (setq version (package-version-join (package-desc-vers desc))
+ installable t)
+ (if built-in
+ (insert "a built-in package.\n\n")
+ (insert "an uninstalled package.\n\n")))
+ (built-in
+ (setq desc (cdr built-in)
+ version (package-version-join (package-desc-vers desc)))
+ (insert "a built-in package.\n\n"))
+ (t
+ (insert "an orphan package.\n\n")))
+
+ (insert " " (propertize "Status" 'font-lock-face 'bold) ": ")
+ (cond (pkg-dir
+ (insert (propertize "Installed"
+ 'font-lock-face 'font-lock-comment-face))
+ (insert " in `")
+ ;; Todo: Add button for uninstalling.
+ (help-insert-xref-button (file-name-as-directory pkg-dir)
+ 'help-package-def pkg-dir)
+ (if built-in
+ (insert "',\n shadowing a "
+ (propertize "built-in package"
+ 'font-lock-face 'font-lock-builtin-face)
+ ".")
+ (insert "'.")))
+ (installable
+ (if built-in
+ (insert (propertize "Built-in." 'font-lock-face 'font-lock-builtin-face)
+ " Alternate version available -- ")
+ (insert "Available -- "))
+ (let ((button-text (if (display-graphic-p) "Install" "[Install]"))
+ (button-face (if (display-graphic-p)
+ '(:box (:line-width 2 :color "dark grey")
+ :background "light grey"
+ :foreground "black")
+ 'link)))
+ (insert-text-button button-text 'face button-face 'follow-link t
+ 'package-symbol package
+ 'action 'package-install-button-action)))
+ (built-in
+ (insert (propertize "Built-in." 'font-lock-face 'font-lock-builtin-face)))
+ (t (insert "Deleted.")))
+ (insert "\n")
+ (and version (> (length version) 0)
+ (insert " "
+ (propertize "Version" 'font-lock-face 'bold) ": " version "\n"))
+
+ (setq reqs (if desc (package-desc-reqs desc)))
+ (when reqs
+ (insert " " (propertize "Requires" 'font-lock-face 'bold) ": ")
+ (let ((first t)
+ name vers text)
+ (dolist (req reqs)
+ (setq name (car req)
+ vers (cadr req)
+ text (format "%s-%s" (symbol-name name)
+ (package-version-join vers)))
+ (cond (first (setq first nil))
+ ((>= (+ 2 (current-column) (length text))
+ (window-width))
+ (insert ",\n "))
+ (t (insert ", ")))
+ (help-insert-xref-button text 'help-package name))
+ (insert "\n")))
+ (insert " " (propertize "Summary" 'font-lock-face 'bold)
+ ": " (if desc (package-desc-doc desc)) "\n\n")
+
+ (if built-in
+ ;; For built-in packages, insert the commentary.
+ (let ((fn (locate-file (concat package-name ".el") load-path
+ load-file-rep-suffixes))
+ (opoint (point)))
+ (insert (or (lm-commentary fn) ""))
+ (save-excursion
+ (goto-char opoint)
+ (when (re-search-forward "^;;; Commentary:\n" nil t)
+ (replace-match ""))
+ (while (re-search-forward "^\\(;+ ?\\)" nil t)
+ (replace-match ""))))
+ (let ((readme (expand-file-name (concat package-name "-readme.txt")
+ package-user-dir))
+ readme-string)
+ ;; For elpa packages, try downloading the commentary. If that
+ ;; fails, try an existing readme file in `package-user-dir'.
+ (cond ((condition-case nil
+ (package--with-work-buffer (package-archive-base package)
+ (concat package-name "-readme.txt")
+ (setq buffer-file-name
+ (expand-file-name readme package-user-dir))
+ (let ((version-control 'never))
+ (save-buffer))
+ (setq readme-string (buffer-string))
+ t)
+ (error nil))
+ (insert readme-string))
+ ((file-readable-p readme)
+ (insert-file-contents readme)
+ (goto-char (point-max))))))))
+
+(defun package-install-button-action (button)
+ (let ((package (button-get button 'package-symbol)))
+ (when (y-or-n-p (format "Install package `%s'? " package))
+ (package-install package)
+ (revert-buffer nil t)
+ (goto-char (point-min)))))
+
+
+;;;; Package menu mode.
+
+(defvar package-menu-mode-map
+ (let ((map (copy-keymap special-mode-map))
+ (menu-map (make-sparse-keymap "Package")))
+ (set-keymap-parent map button-buffer-map)
+ (define-key map "\C-m" 'package-menu-describe-package)
+ (define-key map "n" 'next-line)
+ (define-key map "p" 'previous-line)
+ (define-key map "u" 'package-menu-mark-unmark)
+ (define-key map "\177" 'package-menu-backup-unmark)
+ (define-key map "d" 'package-menu-mark-delete)
+ (define-key map "i" 'package-menu-mark-install)
+ (define-key map "r" 'package-menu-refresh)
+ (define-key map "~" 'package-menu-mark-obsolete-for-deletion)
+ (define-key map "x" 'package-menu-execute)
+ (define-key map "h" 'package-menu-quick-help)
+ (define-key map "?" 'package-menu-describe-package)
+ (define-key map [follow-link] 'mouse-face)
+ (define-key map [mouse-2] 'mouse-select-window)
+ (define-key map [menu-bar package-menu] (cons "Package" menu-map))
+ (define-key menu-map [mq]
+ '(menu-item "Quit" quit-window
+ :help "Quit package selection"))
+ (define-key menu-map [s1] '("--"))
+ (define-key menu-map [mn]
+ '(menu-item "Next" next-line
+ :help "Next Line"))
+ (define-key menu-map [mp]
+ '(menu-item "Previous" previous-line
+ :help "Previous Line"))
+ (define-key menu-map [s2] '("--"))
+ (define-key menu-map [mu]
+ '(menu-item "Unmark" package-menu-mark-unmark
+ :help "Clear any marks on a package and move to the next line"))
+ (define-key menu-map [munm]
+ '(menu-item "Unmark backwards" package-menu-backup-unmark
+ :help "Back up one line and clear any marks on that package"))
+ (define-key menu-map [md]
+ '(menu-item "Mark for deletion" package-menu-mark-delete
+ :help "Mark a package for deletion and move to the next line"))
+ (define-key menu-map [mi]
+ '(menu-item "Mark for install" package-menu-mark-install
+ :help "Mark a package for installation and move to the next line"))
+ (define-key menu-map [s3] '("--"))
+ (define-key menu-map [mg]
+ '(menu-item "Update package list" revert-buffer
+ :help "Update the list of packages"))
+ (define-key menu-map [mr]
+ '(menu-item "Refresh package list" package-menu-refresh
+ :help "Download the ELPA archive"))
+ (define-key menu-map [s4] '("--"))
+ (define-key menu-map [mt]
+ '(menu-item "Mark obsolete packages" package-menu-mark-obsolete-for-deletion
+ :help "Mark all obsolete packages for deletion"))
+ (define-key menu-map [mx]
+ '(menu-item "Execute actions" package-menu-execute
+ :help "Perform all the marked actions"))
+ (define-key menu-map [s5] '("--"))
+ (define-key menu-map [mh]
+ '(menu-item "Help" package-menu-quick-help
+ :help "Show short key binding help for package-menu-mode"))
+ (define-key menu-map [mc]
+ '(menu-item "View Commentary" package-menu-view-commentary
+ :help "Display information about this package"))
+ map)
+ "Local keymap for `package-menu-mode' buffers.")
+
+(defvar package-menu-sort-button-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map [header-line mouse-1] 'package-menu-sort-by-column)
+ (define-key map [header-line mouse-2] 'package-menu-sort-by-column)
+ (define-key map [follow-link] 'mouse-face)
+ map)
+ "Local keymap for package menu sort buttons.")
+
+(put 'package-menu-mode 'mode-class 'special)
+
+(define-derived-mode package-menu-mode special-mode "Package Menu"
+ "Major mode for browsing a list of packages.
+Letters do not insert themselves; instead, they are commands.
+\\<package-menu-mode-map>
+\\{package-menu-mode-map}"
+ (setq truncate-lines t)
+ (setq buffer-read-only t)
+ (set (make-local-variable 'revert-buffer-function) 'package-menu-revert)
+ (setq header-line-format
+ (mapconcat
+ (lambda (pair)
+ (let ((column (car pair))
+ (name (cdr pair)))
+ (concat
+ ;; Insert a space that aligns the button properly.
+ (propertize " " 'display (list 'space :align-to column)
+ 'face 'fixed-pitch)
+ ;; Set up the column button.
+ (propertize name
+ 'column-name name
+ 'help-echo "mouse-1: sort by column"
+ 'mouse-face 'highlight
+ 'keymap package-menu-sort-button-map))))
+ ;; We take a trick from buff-menu and have a dummy leading
+ ;; space to align the header line with the beginning of the
+ ;; text. This doesn't really work properly on Emacs 21, but
+ ;; it is close enough.
+ '((0 . "")
+ (2 . "Package")
+ (20 . "Version")
+ (32 . "Status")
+ (43 . "Description"))
+ "")))
+
+(defun package-menu-refresh ()
+ "Download the Emacs Lisp package archive.
+This fetches the contents of each archive specified in
+`package-archives', and then refreshes the package menu."
+ (interactive)
+ (unless (eq major-mode 'package-menu-mode)
+ (error "The current buffer is not a Package Menu"))
+ (package-refresh-contents)
+ (package--generate-package-list))
+
+(defun package-menu-revert (&optional arg noconfirm)
+ "Update the list of packages.
+This function is the `revert-buffer-function' for Package Menu
+buffers. The arguments are ignored."
+ (interactive)
+ (unless (eq major-mode 'package-menu-mode)
+ (error "The current buffer is not a Package Menu"))
+ (package--generate-package-list))
+
+(defun package-menu-describe-package ()
+ "Describe the package in the current line."
+ (interactive)
+ (let ((name (package-menu-get-package)))
+ (if name
+ (describe-package (intern name))
+ (message "No package on this line"))))
+
+(defun package-menu-mark-internal (what)
+ (unless (eobp)
+ (let ((buffer-read-only nil))
+ (beginning-of-line)
+ (delete-char 1)
+ (insert what)
+ (forward-line))))
+
+;; fixme numeric argument
+(defun package-menu-mark-delete (num)
+ "Mark a package for deletion and move to the next line."
+ (interactive "p")
+ (if (string-equal (package-menu-get-status) "installed")
+ (package-menu-mark-internal "D")
+ (forward-line)))
+
+(defun package-menu-mark-install (num)
+ "Mark a package for installation and move to the next line."
+ (interactive "p")
+ (if (string-equal (package-menu-get-status) "available")
+ (package-menu-mark-internal "I")
+ (forward-line)))
+
+(defun package-menu-mark-unmark (num)
+ "Clear any marks on a package and move to the next line."
+ (interactive "p")
+ (package-menu-mark-internal " "))
+
+(defun package-menu-backup-unmark ()
+ "Back up one line and clear any marks on that package."
+ (interactive)
+ (forward-line -1)
+ (package-menu-mark-internal " ")
+ (forward-line -1))
+
+(defun package-menu-mark-obsolete-for-deletion ()
+ "Mark all obsolete packages for deletion."
+ (interactive)
+ (save-excursion
+ (goto-char (point-min))
+ (forward-line 2)
+ (while (not (eobp))
+ (if (looking-at ".*\\s obsolete\\s ")
+ (package-menu-mark-internal "D")
+ (forward-line 1)))))
+
+(defun package-menu-quick-help ()
+ "Show short key binding help for package-menu-mode."
+ (interactive)
+ (message "n-ext, i-nstall, d-elete, u-nmark, x-ecute, r-efresh, h-elp"))
+
+(define-obsolete-function-alias
+ 'package-menu-view-commentary 'package-menu-describe-package "24.1")
+
+;; Return the name of the package on the current line.
+(defun package-menu-get-package ()
+ (save-excursion
+ (beginning-of-line)
+ (if (looking-at ". \\([^ \t]*\\)")
+ (match-string-no-properties 1))))
+
+;; Return the version of the package on the current line.
+(defun package-menu-get-version ()
+ (save-excursion
+ (beginning-of-line)
+ (if (looking-at ". [^ \t]*[ \t]*\\([0-9.]*\\)")
+ (match-string 1))))
+
+(defun package-menu-get-status ()
+ (save-excursion
+ (if (looking-at ". [^ \t]*[ \t]*[^ \t]*[ \t]*\\([^ \t]*\\)")
+ (match-string 1)
+ "")))
+
+(defun package-menu-execute ()
+ "Perform marked Package Menu actions.
+Packages marked for installation are downloaded and installed;
+packages marked for deletion are removed."
+ (interactive)
+ (let (install-list delete-list cmd)
+ (save-excursion
+ (goto-char (point-min))
+ (while (not (eobp))
+ (setq cmd (char-after))
+ (cond
+ ((eq cmd ?\s) t)
+ ((eq cmd ?D)
+ (push (cons (package-menu-get-package)
+ (package-menu-get-version))
+ delete-list))
+ ((eq cmd ?I)
+ (push (package-menu-get-package) install-list)))
+ (forward-line)))
+ ;; Delete packages, prompting if necessary.
+ (when delete-list
+ (if (yes-or-no-p
+ (if (= (length delete-list) 1)
+ (format "Delete package `%s-%s'? "
+ (caar delete-list)
+ (cdr (car delete-list)))
+ (format "Delete these %d packages (%s)? "
+ (length delete-list)
+ (mapconcat (lambda (elt)
+ (concat (car elt) "-" (cdr elt)))
+ delete-list
+ ", "))))
+ (dolist (elt delete-list)
+ (condition-case-no-debug err
+ (package-delete (car elt) (cdr elt))
+ (error (message (cadr err)))))
+ (error "Aborted")))
+ (when install-list
+ (if (yes-or-no-p
+ (if (= (length install-list) 1)
+ (format "Install package `%s'? " (car install-list))
+ (format "Install these %d packages (%s)? "
+ (length install-list)
+ (mapconcat 'identity install-list ", "))))
+ (dolist (elt install-list)
+ (package-install (intern elt)))))
+ ;; If we deleted anything, regenerate `package-alist'. This is done
+ ;; automatically if we installed a package.
+ (and delete-list (null install-list)
+ (package-initialize))
+ (if (or delete-list install-list)
+ (package-menu-revert)
+ (message "No operations specified."))))
+
+(defun package-print-package (package version key desc)
+ (let ((face
+ (cond ((string= key "built-in") 'font-lock-builtin-face)
+ ((string= key "available") 'default)
+ ((string= key "held") 'font-lock-constant-face)
+ ((string= key "disabled") 'font-lock-warning-face)
+ ((string= key "installed") 'font-lock-comment-face)
+ (t ; obsolete, but also the default.
+ 'font-lock-warning-face))))
+ (insert (propertize " " 'font-lock-face face))
+ (insert-text-button (symbol-name package)
+ 'face 'link
+ 'follow-link t
+ 'package-symbol package
+ 'action (lambda (button)
+ (describe-package
+ (button-get button 'package-symbol))))
+ (indent-to 20 1)
+ (insert (propertize (package-version-join version) 'font-lock-face face))
+ (indent-to 32 1)
+ (insert (propertize key 'font-lock-face face))
+ ;; FIXME: this 'when' is bogus...
+ (when desc
+ (indent-to 43 1)
+ (let ((opoint (point)))
+ (insert (propertize desc 'font-lock-face face))
+ (upcase-region opoint (min (point) (1+ opoint)))))
+ (insert "\n")))
+
+(defun package-list-maybe-add (package version status description result)
+ (unless (assoc (cons package version) result)
+ (push (list (cons package version) status description) result))
+ result)
+
+(defvar package-menu-package-list nil
+ "List of packages to display in the Package Menu buffer.
+A value of nil means to display all packages.")
+
+(defvar package-menu-sort-key nil
+ "Sort key for the current Package Menu buffer.")
+
+(defun package--generate-package-list ()
+ "Populate the current Package Menu buffer."
+ (let ((inhibit-read-only t)
+ info-list name desc hold builtin)
+ (erase-buffer)
+ ;; List installed packages
+ (dolist (elt package-alist)
+ (setq name (car elt))
+ (when (or (null package-menu-package-list)
+ (memq name package-menu-package-list))
+ (setq desc (cdr elt)
+ hold (cadr (assq name package-load-list)))
+ (setq info-list
+ (package-list-maybe-add
+ name (package-desc-vers desc)
+ ;; FIXME: it turns out to be tricky to see if this
+ ;; package is presently activated.
+ (if (stringp hold) "held" "installed")
+ (package-desc-doc desc)
+ info-list))))
+
+ ;; List built-in packages
+ (dolist (elt package--builtins)
+ (setq name (car elt))
+ (when (and (not (eq name 'emacs)) ; Hide the `emacs' package.
+ (or (null package-menu-package-list)
+ (memq name package-menu-package-list)))
+ (setq desc (cdr elt))
+ (setq info-list
+ (package-list-maybe-add
+ name (package-desc-vers desc)
+ "built-in"
+ (package-desc-doc desc)
+ info-list))))
+
+ ;; List available and disabled packages
+ (dolist (elt package-archive-contents)
+ (setq name (car elt)
+ desc (cdr elt)
+ hold (assq name package-load-list))
+ (when (or (null package-menu-package-list)
+ (memq name package-menu-package-list))
+ (setq info-list
+ (package-list-maybe-add name
+ (package-desc-vers desc)
+ (if (and hold (null (cadr hold)))
+ "disabled"
+ "available")
+ (package-desc-doc (cdr elt))
+ info-list))))
+ ;; List obsolete packages
+ (mapc (lambda (elt)
+ (mapc (lambda (inner-elt)
+ (setq info-list
+ (package-list-maybe-add (car elt)
+ (package-desc-vers
+ (cdr inner-elt))
+ "obsolete"
+ (package-desc-doc
+ (cdr inner-elt))
+ info-list)))
+ (cdr elt)))
+ package-obsolete-alist)
+
+ (setq info-list
+ (sort info-list
+ (cond ((string= package-menu-sort-key "Package")
+ 'package-menu--name-predicate)
+ ((string= package-menu-sort-key "Version")
+ 'package-menu--version-predicate)
+ ((string= package-menu-sort-key "Description")
+ 'package-menu--description-predicate)
+ (t ; By default, sort by package status
+ 'package-menu--status-predicate))))
+
+ (dolist (elt info-list)
+ (package-print-package (car (car elt))
+ (cdr (car elt))
+ (car (cdr elt))
+ (car (cdr (cdr elt)))))
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (current-buffer)))
+
+(defun package-menu--version-predicate (left right)
+ (let ((vleft (or (cdr (car left)) '(0)))
+ (vright (or (cdr (car right)) '(0))))
+ (if (version-list-= vleft vright)
+ (package-menu--name-predicate left right)
+ (version-list-< vleft vright))))
+
+(defun package-menu--status-predicate (left right)
+ (let ((sleft (cadr left))
+ (sright (cadr right)))
+ (cond ((string= sleft sright)
+ (package-menu--name-predicate left right))
+ ((string= sleft "available") t)
+ ((string= sright "available") nil)
+ ((string= sleft "installed") t)
+ ((string= sright "installed") nil)
+ ((string= sleft "held") t)
+ ((string= sright "held") nil)
+ ((string= sleft "built-in") t)
+ ((string= sright "built-in") nil)
+ ((string= sleft "obsolete") t)
+ ((string= sright "obsolete") nil)
+ (t (string< sleft sright)))))
+
+(defun package-menu--description-predicate (left right)
+ (let ((sleft (car (cddr left)))
+ (sright (car (cddr right))))
+ (if (string= sleft sright)
+ (package-menu--name-predicate left right)
+ (string< sleft sright))))
+
+(defun package-menu--name-predicate (left right)
+ (string< (symbol-name (caar left))
+ (symbol-name (caar right))))
+
+(defun package-menu-sort-by-column (&optional e)
+ "Sort the package menu by the column of the mouse click E."
+ (interactive "e")
+ (let* ((pos (event-start e))
+ (obj (posn-object pos))
+ (col (if obj
+ (get-text-property (cdr obj) 'column-name (car obj))
+ (get-text-property (posn-point pos) 'column-name)))
+ (buf (window-buffer (posn-window (event-start e)))))
+ (with-current-buffer buf
+ (when (eq major-mode 'package-menu-mode)
+ (setq package-menu-sort-key col)
+ (package--generate-package-list)))))
+
+(defun package--list-packages (&optional packages)
+ "Generate and pop to the *Packages* buffer.
+Optional PACKAGES is a list of names of packages (symbols) to
+list; the default is to display everything in `package-alist'."
+ (require 'finder-inf nil t)
+ (let ((buf (get-buffer-create "*Packages*")))
+ (with-current-buffer buf
+ (package-menu-mode)
+ (set (make-local-variable 'package-menu-package-list) packages)
+ (set (make-local-variable 'package-menu-sort-key) nil)
+ (package--generate-package-list))
+ ;; The package menu buffer has keybindings. If the user types
+ ;; `M-x list-packages', that suggests it should become current.
+ (switch-to-buffer buf)))
+
+;;;###autoload
+(defun list-packages ()
+ "Display a list of packages.
+Fetches the updated list of packages before displaying.
+The list is displayed in a buffer named `*Packages*'."
+ (interactive)
+ ;; Initialize the package system if necessary.
+ (unless package--initialized
+ (package-initialize t))
+ (package-refresh-contents)
+ (package--list-packages))
+
+;;;###autoload
+(defalias 'package-list-packages 'list-packages)
+
+(defun package-list-packages-no-fetch ()
+ "Display a list of packages.
+Does not fetch the updated list of packages before displaying.
+The list is displayed in a buffer named `*Packages*'."
+ (interactive)
+ (package--list-packages))
+
+(provide 'package)
+
+;;; package.el ends here
View
15 my-starter-kit.el
@@ -42,7 +42,20 @@
;; packages are available from a few places:
;; @see http://www.emacswiki.org/emacs/ELPA
-(require 'package)
+(defun load-extras-package-el ()
+ "fall back to loading extras/package.el"
+ (progn
+ (add-to-list 'load-path (concat (file-name-directory load-file-name) "fallbacks"))
+ (require 'package)))
+
+;; load package.el
+(condition-case nil
+ (require 'package)
+ (error
+ (message "package.el not found, trying extras/package.el")
+ (load-extras-package-el)))
+
+
(setq package-archives '(("ELPA" . "http://tromey.com/elpa/")
("gnu" . "http://elpa.gnu.org/packages/")
("marmelaide" . "http://marmalade-repo.org/packages/")
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