package.el 60.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
;;; package.el --- Simple package system for Emacs

;; Copyright (C) 2007, 2008, 2009, 2010 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.

55
;; A .el file is named "NAME-VERSION.el" in the remote archive, but is
56 57
;; installed as simply "NAME.el" in a directory named "NAME-VERSION".

58 59 60 61
;; 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.
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208

;; 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 package-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)
209
  :risky t
210 211 212 213 214 215 216 217 218
  :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))
(declare-function dired-delete-file "dired" (file &optional recursive trash))
219
(defvar url-http-end-of-headers)
220

221 222 223 224 225 226 227 228 229 230
(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 . URL), where ID is an identifier
string for an archive and URL is a http: URL (a string)."
  :type '(alist :key-type (string :tag "Archive name")
                :value-type (string :tag "Archive URL"))
  :risky t
  :group 'package
  :version "24.1")
231 232 233 234 235 236 237 238 239 240 241 242 243

(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'
244 245 246 247
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)
248 249 250 251 252 253 254

(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
255
  :risky t
256 257 258 259 260 261 262
  :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)
263 264 265
      (and (stringp f)
	   (equal (file-name-nondirectory f) "site-lisp")
	   (push (expand-file-name "elpa" f) result)))
266 267 268 269 270 271 272
    (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)
273
  :risky t
274 275 276
  :group 'package
  :version "24.1")

277 278 279 280 281 282 283 284 285 286 287
;; 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.
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.")
288
(put 'package--builtins 'risky-local-variable t)
289

290
(defvar package-alist nil
291
  "Alist of all packages available for activation.
292 293
Each element has the form (PKG . DESC), where PKG is a package
name (a symbol) and DESC is a vector that describes the package.
294

295 296 297 298 299 300 301 302
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'.")
303
(put 'package-archive-contents 'risky-local-variable t)
304

305
(defvar package-activated-list nil
306
  "List of the names of currently activated packages.")
307
(put 'package-activated-list 'risky-local-variable t)
308 309 310 311 312

(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.")
313
(put 'package-obsolete-alist 'risky-local-variable t)
314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331

(defconst package-subdirectory-regexp
  "^\\([^.].*\\)-\\([0-9]+\\(?:[.][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 (l)
  "Turn a list of version numbers into a version string."
  (mapconcat 'int-to-string l "."))

(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)
332 333 334 335 336 337 338 339
  "Load the description file in directory DIR for package PACKAGE."
  (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))))
340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367

(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
368 369
		    (version-list-= (version-to-list version)
				    (version-to-list force)))
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
		   (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))

390 391
(defun package--dir (name version-string)
  (let* ((subdir (concat name "-" version-string))
392
	 (dir-list (cons package-user-dir package-directory-list))
393
	 pkg-dir)
394
    (while dir-list
395 396 397 398
      (let ((subdir-full (expand-file-name subdir (car dir-list))))
	(if (file-directory-p subdir-full)
	    (setq pkg-dir  subdir-full
		  dir-list nil)
399
	  (setq dir-list (cdr dir-list)))))
400 401 402 403 404 405
    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)))
406 407
    (unless pkg-dir
      (error "Internal error: could not find directory for %s-%s"
408 409
	     name version-str))
    ;; Add info node.
410 411 412 413 414
    (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))
415
    ;; Add to load path, add autoloads, and activate the package.
416
    (push pkg-dir load-path)
417
    (load (expand-file-name (concat name "-autoloads") pkg-dir) nil t)
418
    (push package package-activated-list)
419 420 421 422 423 424
    ;; Don't return nil.
    t))

(defun package--built-in (package version)
  "Return true if the package is built-in to Emacs."
  (let ((elt (assq package package--builtins)))
425
    (and elt (version-list-= (package-desc-vers (cdr elt)) version))))
426 427 428 429 430 431 432 433 434 435 436 437 438 439 440

;; FIXME: return a reason instead?
(defun package-activate (package version)
  "Activate a package, and recursively activate its dependencies.
Return nil if the package could not be activated."
  ;; Assume the user knows what he is doing -- go ahead and activate a
  ;; newer version of a package if an older one has already been
  ;; 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.  However, don't try to activate 'emacs', as that makes
  ;; no sense.
  (unless (eq package 'emacs)
    (let* ((pkg-desc (assq package package-alist))
	   (this-version (package-desc-vers (cdr pkg-desc)))
	   (req-list (package-desc-reqs (cdr pkg-desc)))
441
	   ;; If the package was never activated, do it now.
442
	   (keep-going (or (not (memq package package-activated-list))
443
			   (version-list-< version this-version))))
444 445 446 447 448 449 450 451 452 453 454 455 456
      (while (and req-list keep-going)
	(let* ((req (car req-list))
	       (req-name (car req))
	       (req-version (cadr req)))
	  (or (package-activate req-name req-version)
	      (setq keep-going nil)))
	(setq req-list (cdr req-list)))
      (if keep-going
	  (package-activate-1 package (cdr pkg-desc))
	;; We get here if a dependency failed to activate -- but we
	;; can also get here if the requested package was already
	;; activated.  Return non-nil in the latter case.
	(and (memq package package-activated-list)
457
	     (version-list-<= version this-version))))))
458 459 460 461 462 463 464 465 466 467 468

(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.
469 470 471
      (push (cons package (list (cons (package-desc-vers pkg-vec)
				      pkg-vec)))
	    package-obsolete-alist))))
472 473

(defun define-package (name-str version-string
474 475
				&optional docstring requirements
				&rest extra-properties)
476 477 478 479 480 481
  "Define a new package.
NAME is the name of the package, a string.
VERSION-STRING is the version of the package, a dotted sequence
of integers.
DOCSTRING is the optional description.
REQUIREMENTS is a list of requirements on other packages.
482 483 484
Each requirement is of the form (OTHER-PACKAGE \"VERSION\").

EXTRA-PROPERTIES is currently unused."
485 486
  (let* ((name (intern name-str))
	 (pkg-desc (assq name package-alist))
487
	 (new-version (version-to-list version-string))
488 489 490 491 492 493
	 (new-pkg-desc
	  (cons name
		(vector new-version
			(mapcar
			 (lambda (elt)
			   (list (car elt)
494
				 (version-to-list (car (cdr elt)))))
495 496 497 498
			 requirements)
			docstring))))
    ;; Only redefine a package if the redefinition is newer.
    (if (or (not pkg-desc)
499 500
	    (version-list-< (package-desc-vers (cdr pkg-desc))
			    new-version))
501 502 503 504 505 506
	(progn
	  (when pkg-desc
	    ;; Remove old package and declare it obsolete.
	    (setq package-alist (delq pkg-desc package-alist))
	    (package-mark-obsolete (car pkg-desc) (cdr pkg-desc)))
	  ;; Add package to the alist.
507
	  (push new-pkg-desc package-alist))
508 509 510
      ;; You can have two packages with the same version, for instance
      ;; one in the system package directory and one in your private
      ;; directory.  We just let the first one win.
511 512
      (unless (version-list-= new-version
			      (package-desc-vers (cdr pkg-desc)))
513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
	;; The package is born obsolete.
	(package-mark-obsolete (car new-pkg-desc) (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)))
    ;; Be careful!!
    (make-directory package-user-dir t)
    (if (file-directory-p pkg-dir)
	(mapc (lambda (file) nil) ; 'delete-file -- FIXME: when we're
				  ; more confident
	      (directory-files pkg-dir t "^[^.]")))
    (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)))))

577 578 579 580
(defun package--write-file-no-coding (file-name excl)
  (let ((buffer-file-coding-system 'no-conversion))
    (write-region (point-min) (point-max) file-name nil nil nil excl)))

581 582 583 584
(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")
585 586 587
      (package--write-file-no-coding
       (expand-file-name (concat file-name ".el") package-user-dir)
       nil)
588 589 590 591 592
    (let* ((pkg-dir  (expand-file-name (concat file-name "-" 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)
593
      (package--write-file-no-coding el-file 'excl)
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
      (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 (car (cdr 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)))))

(defun package-handle-response ()
  "Handle the response from the server.
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))
      (display-buffer (current-buffer))
      (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 ((buffer (url-retrieve-synchronously
637
		 (concat (package-archive-url name)
638 639 640 641 642 643 644 645 646 647 648 649
			 (symbol-name name) "-" version ".el"))))
    (with-current-buffer buffer
      (package-handle-response)
      (re-search-forward "^$" nil 'move)
      (forward-char)
      (delete-region (point-min) (point))
      (package-unpack-single (symbol-name name) version desc requires)
      (kill-buffer buffer))))

(defun package-download-tar (name version)
  "Download and install a tar package."
  (let ((tar-buffer (url-retrieve-synchronously
650
		     (concat (package-archive-url name)
651 652 653 654 655 656 657 658
			     (symbol-name name) "-" version ".tar"))))
    (with-current-buffer tar-buffer
      (package-handle-response)
      (re-search-forward "^$" nil 'move)
      (forward-char)
      (package-unpack name version)
      (kill-buffer tar-buffer))))

659
(defun package-installed-p (package &optional min-version)
660 661
  (let ((pkg-desc (assq package package-alist)))
    (and pkg-desc
662 663
	 (version-list-<= min-version
			  (package-desc-vers (cdr pkg-desc))))))
664

665 666 667 668 669 670 671 672 673 674 675 676 677
(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."
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
  (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'"))
693
		  ((version-list-< (version-to-list hold) next-version)
694 695 696 697 698 699 700
		   (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' is not available for installation"
		   (symbol-name next-pkg)))
701 702
	  (unless (version-list-<= next-version
				   (package-desc-vers (cdr pkg-desc)))
703 704 705 706 707
	    (error
	     "Need package '%s' with version %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.
708
	  (unless (memq next-pkg package-list)
709
	    (push next-pkg package-list))
710 711
	  (setq package-list
		(package-compute-transaction package-list
712 713
					     (package-desc-reqs
					      (cdr pkg-desc))))))))
714
  package-list)
715 716 717 718 719

(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))
720 721 722 723 724 725 726
	 (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))))
727 728 729 730 731 732 733 734 735
    (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)))
736 737 738 739 740 741 742 743
    (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))))))
744

745
(defun package-read-all-archive-contents ()
746 747
  "Re-read `archive-contents', if it exists.
If successful, set `package-archive-contents'."
748
  (dolist (archive package-archives)
749
    (package-read-archive-contents (car archive))))
750

751
(defun package-read-archive-contents (archive)
752 753
  "Re-read archive contents for ARCHIVE.
If successful, set the variable `package-archive-contents'.
754
If the archive version is too new, signal an error."
755 756 757 758 759 760 761 762
  ;; 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)))))
763 764 765 766 767 768 769 770 771 772

(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)
773
              (version-list-< (aref existing-package 0) version))
774 775
      (add-to-list 'package-archive-contents entry))))

776 777 778 779 780 781 782
(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)
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
    (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.
804
The package is found on one of the archives in `package-archives'."
805
  (interactive
806 807 808 809 810 811
   (list (intern (completing-read "Install package: "
				  (mapcar (lambda (elt)
					    (cons (symbol-name (car elt))
						  nil))
					  package-archive-contents)
				  nil t))))
812 813
  (let ((pkg-desc (assq name package-archive-contents)))
    (unless pkg-desc
814
      (error "Package '%s' is not available for installation"
815
	     (symbol-name name)))
816 817 818
    (package-download-transaction
     (package-compute-transaction (list name)
				  (package-desc-reqs (cdr pkg-desc)))))
819 820 821 822 823 824 825 826 827 828 829 830 831 832
  ;; Try to activate it.
  (package-initialize))

(defun package-strip-rcs-id (v-str)
  "Strip RCS version ID from the version string.
If the result looks like a dotted numeric version, return it.
Otherwise return nil."
  (if v-str
      (if (string-match "^[ \t]*[$]Revision:[ \t]\([0-9.]+\)[ \t]*[$]$" v-str)
	  (match-string 1 v-str)
	(if (string-match "^[0-9.]*$" v-str)
	    v-str))))

(defun package-buffer-info ()
833 834 835 836 837 838
  "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.
839
REQUIRES is a requires list, or nil.
840
DESCRIPTION is the package description, a string.
841 842
VERSION is the version, a string.
COMMENTARY is the commentary section, a string, or nil if none.
843 844 845 846

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."
847
  (goto-char (point-min))
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
  (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))))
880 881 882 883 884 885

(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'."
  (unless (string-match "^\\(.+\\)-\\([0-9.]+\\)\\.tar$" file)
886
    (error "Invalid package name `%s'" file))
887 888 889 890 891 892 893 894 895 896
  (let* ((pkg-name (file-name-nondirectory (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)
897 898
      (error "No `define-package' sexp is present in `%s-pkg.el'" pkg-name))
    (let ((name-str       (nth 1 pkg-def-parsed))
899
	  (version-string (nth 2 pkg-def-parsed))
900 901
	  (docstring      (nth 3 pkg-def-parsed))
	  (requires       (nth 4 pkg-def-parsed))
902 903 904 905 906
	  (readme (shell-command-to-string
		   ;; Requires GNU tar.
		   (concat "tar -xOf " file " "
			   pkg-name "-" pkg-version "/README"))))
      (unless (equal pkg-version version-string)
907
	(error "Package has inconsistent versions"))
908
      (unless (equal pkg-name name-str)
909
	(error "Package has inconsistent names"))
910 911 912 913 914 915 916
      ;; 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
917 918 919 920
	    (mapcar (lambda (elt)
		      (list (car elt)
			    (version-to-list (cadr elt))))
		    requires))
921 922
      (vector pkg-name requires docstring version-string readme))))

923 924 925 926 927 928 929 930 931 932 933
;;;###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))
934 935 936
  (save-excursion
    (save-restriction
      (let* ((file-name (aref pkg-info 0))
937
	     (requires  (aref pkg-info 1))
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
	     (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
964 965
     ((string-match "\\.el$" file)
      (package-install-from-buffer (package-buffer-info) 'single))
966
     ((string-match "\\.tar$" file)
967
      (package-install-from-buffer (package-tar-file-info file) 'tar))
968 969 970 971 972 973 974 975 976
     (t (error "Unrecognized extension `%s'" (file-name-extension file))))))

(defun package-delete (name version)
  (require 'dired)			; for dired-delete-file
  (dired-delete-file (expand-file-name (concat name "-" version)
				       package-user-dir)
		     ;; FIXME: query user?
		     'always))

977
(defun package-archive-url (name)
978 979 980 981 982 983 984 985 986 987 988
  "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)
  "Download an archive file FILE from ARCHIVE, and cache it locally."
  (let* ((archive-name (car archive))
         (archive-url  (cdr archive))
	 (dir (expand-file-name "archives" package-user-dir))
	 (dir (expand-file-name archive-name dir))
         (buffer (url-retrieve-synchronously (concat archive-url file))))
989 990 991 992 993
    (with-current-buffer buffer
      (package-handle-response)
      (re-search-forward "^$" nil 'move)
      (forward-char)
      (delete-region (point-min) (point))
994 995 996 997 998 999 1000
      ;; 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))))
1001
    (kill-buffer buffer)))
1002 1003 1004

(defun package-refresh-contents ()
  "Download the ELPA archive description if needed.
1005 1006
This informs Emacs about the latest versions of all packages, and
makes them available for download."
1007 1008 1009
  (interactive)
  (unless (file-exists-p package-user-dir)
    (make-directory package-user-dir t))
1010
  (dolist (archive package-archives)
1011 1012
    (condition-case nil
	(package--download-one-archive archive "archive-contents")
1013
      (error (message "Failed to download `%s' archive."
1014
		      (car archive)))))
1015
  (package-read-all-archive-contents))
1016 1017 1018 1019 1020 1021

;;;###autoload
(defun package-initialize ()
  "Load Emacs Lisp packages, and activate them.
The variable `package-load-list' controls which packages to load."
  (interactive)
1022 1023 1024
  (require 'finder-inf nil t)
  (setq package-alist package--builtins)
  (setq package-activated-list (mapcar #'car package-alist))
1025 1026
  (setq package-obsolete-alist nil)
  (package-load-all-descriptors)
1027
  (package-read-all-archive-contents)
1028 1029 1030 1031 1032 1033
  ;; Try to activate all our packages.
  (mapc (lambda (elt)
	  (package-activate (car elt) (package-desc-vers (cdr elt))))
	package-alist))


1034
;;;; Package description buffer.
1035

1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
;;;###autoload
(defun describe-package (package)
  "Display the full documentation of PACKAGE (a symbol)."
  (interactive
   (let* ((packages (append (mapcar 'car package-alist)
			    (mapcar 'car package-archive-contents)))
	  (guess (function-called-at-point))
	  val)
     (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))
1053
     (list (if (equal val "") guess (intern val)))))
1054 1055 1056 1057 1058 1059 1060 1061 1062
  (if (or (null package) (null (symbolp package)))
      (message "You did not specify a package")
    (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)
1063
  (require 'lisp-mnt)
1064 1065 1066
  (let ((package-name (symbol-name package))
	(built-in (assq package package--builtins))
	desc pkg-dir reqs version installable)
1067 1068
    (prin1 package)
    (princ " is ")
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
    (if (setq desc (cdr (assq package package-alist)))
	;; This package is loaded (i.e. in `package-alist').
	(progn
	  (setq version (package-version-join (package-desc-vers desc)))
	  (cond (built-in
		 (princ "a built-in package.\n\n"))
		((setq pkg-dir (package--dir package-name version))
		 (insert "an installed package.\n\n"))
		(t ;; This normally does not happen.
		 (insert "a deleted package.\n\n")
		 (setq version nil))))
      ;; This package is not installed.
      (setq desc    (cdr (assq package package-archive-contents))
Chong Yidong's avatar
Chong Yidong committed
1082 1083
	    version (package-version-join (package-desc-vers desc))
	    installable t)
1084 1085
      (insert "an uninstalled package.\n\n"))

1086
    (insert "     " (propertize "Status" 'font-lock-face 'bold) ": ")
1087
    (cond (pkg-dir
1088 1089
	   (insert (propertize "Installed"
			       'font-lock-face 'font-lock-comment-face))
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110
	   (insert " in `")
	   ;; Todo: Add button for uninstalling.
	   (help-insert-xref-button (file-name-as-directory pkg-dir)
				    'help-package-def pkg-dir)
	   (insert "'."))
	  (installable
	   (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
1111 1112
	   (insert (propertize "Built-in"
			       'font-lock-face 'font-lock-builtin-face) "."))
1113 1114
	  (t (insert "Deleted.")))
    (insert "\n")
1115 1116 1117 1118
    (and version
	 (> (length version) 0)
	 (insert "    "
		 (propertize "Version" 'font-lock-face 'bold) ": " version "\n"))
Chong Yidong's avatar
Chong Yidong committed
1119 1120
    (setq reqs (package-desc-reqs desc))
    (when reqs
1121
      (insert "   " (propertize "Requires" 'font-lock-face 'bold) ": ")
Chong Yidong's avatar
Chong Yidong committed
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
      (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")))
1136
    (insert "    " (propertize "Summary" 'font-lock-face 'bold)
1137 1138
	    ": " (package-desc-doc desc) "\n\n")

1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
    (if (assq package package--builtins)
	;; 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)))
	;; For elpa packages, try downloading the commentary.  If that
	;; fails, try an existing readme file in `package-user-dir'.
	(cond ((let ((buffer (ignore-errors
			       (url-retrieve-synchronously
				(concat (package-archive-url package)
					package-name "-readme.txt"))))
		     response)
		 (when buffer
		   (with-current-buffer buffer
		     (setq response (url-http-parse-response))
		     (if (or (< response 200) (>= response 300))
			 (setq response nil)
		       (setq buffer-file-name
			     (expand-file-name readme package-user-dir))
		       (delete-region (point-min) (1+ url-http-end-of-headers))
		       (save-buffer)))
		   (when response
		     (insert-buffer-substring buffer)
		     (kill-buffer buffer)
		     t))))
	      ((file-readable-p readme)
	       (insert-file-contents readme)
	       (goto-char (point-max))))))))
1176 1177 1178 1179 1180 1181 1182

(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)))))
1183 1184


1185 1186
;;;; Package menu mode.

1187
(defvar package-menu-mode-map
1188 1189
  (let ((map (make-keymap))
	(menu-map (make-sparse-keymap "Package")))
1190
    (set-keymap-parent map button-buffer-map)
Chong Yidong's avatar
Chong Yidong committed
1191
    (define-key map "\C-m" 'package-menu-describe-package)
1192 1193 1194 1195 1196 1197 1198
    (define-key map "q" 'quit-window)
    (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)
1199
    (define-key map "g" 'revert-buffer)
1200 1201 1202 1203
    (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)
1204
    (define-key map "?" 'package-menu-describe-package)
1205 1206
    (define-key map [follow-link] 'mouse-face)
    (define-key map [mouse-2] 'mouse-select-window)
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
    (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]
1233
      '(menu-item "Update package list" revert-buffer
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
		  :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"))
1252
    map)
1253 1254 1255 1256 1257
  "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)
1258
    (define-key map [header-line mouse-2] 'package-menu-sort-by-column)
1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
    (define-key map [follow-link] 'mouse-face)
    map)
  "Local keymap for package menu sort buttons.")

(put 'package-menu-mode 'mode-class 'special)

(defun package-menu-mode ()
  "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}"
  (kill-all-local-variables)
  (use-local-map package-menu-mode-map)
  (setq major-mode 'package-menu-mode)
  (setq mode-name "Package Menu")
  (setq truncate-lines t)
  (setq buffer-read-only t)
Glenn Morris's avatar
Glenn Morris committed
1276
  (set (make-local-variable 'revert-buffer-function) 'package-menu-revert)
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
  (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"))
	 ""))
  (run-mode-hooks 'package-menu-mode-hook))
1303 1304

(defun package-menu-refresh ()
1305 1306 1307
  "Download the Emacs Lisp package archive.
This fetches the contents of each archive specified in
`package-archives', and then refreshes the package menu."
1308
  (interactive)
1309 1310
  (unless (eq major-mode 'package-menu-mode)
    (error "The current buffer is not a Package Menu"))
1311
  (package-refresh-contents)
1312
  (package--generate-package-list))
1313

1314 1315 1316 1317
(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."
1318
  (interactive)
1319 1320
  (unless (eq major-mode 'package-menu-mode)
    (error "The current buffer is not a Package Menu"))
1321
  (package--generate-package-list))
1322

Chong Yidong's avatar
Chong Yidong committed
1323 1324 1325 1326 1327 1328 1329 1330
(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"))))

1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
(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")
  (package-menu-mark-internal "D"))

(defun package-menu-mark-install (num)
  "Mark a package for installation and move to the next line."
  (interactive "p")
  (package-menu-mark-internal "I"))

(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"))

1378 1379
(define-obsolete-function-alias
  'package-menu-view-commentary 'package-menu-describe-package "24.1")
1380 1381 1382 1383 1384 1385

;; Return the name of the package on the current line.
(defun package-menu-get-package ()
  (save-excursion
    (beginning-of-line)
    (if (looking-at ". \\([^ \t]*\\)")
Chong Yidong's avatar
Chong Yidong committed
1386
	(match-string-no-properties 1))))
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432

;; 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 all the marked actions.
Packages marked for installation will be downloaded and
installed.  Packages marked for deletion will be removed.
Note that after installing packages you will want to restart
Emacs."
  (interactive)
  (goto-char (point-min))
  (while (not (eobp))
    (let ((cmd (char-after))
	  (pkg-name (package-menu-get-package))
	  (pkg-vers (package-menu-get-version))
	  (pkg-status (package-menu-get-status)))
      (cond
       ((eq cmd ?D)
	(when (and (string= pkg-status "installed")
		   (string= pkg-name "package"))
	  ;; FIXME: actually, we could be tricky and remove all info.
	  ;; But that is drastic and the user can do that instead.
	  (error "Can't delete most recent version of `package'"))
	;; Ask for confirmation here?  Maybe if package status is ""?
	;; Or if any lisp from package is actually loaded?
	(message "Deleting %s-%s..." pkg-name pkg-vers)
	(package-delete pkg-name pkg-vers)
	(message "Deleting %s-%s... done" pkg-name pkg-vers))
       ((eq cmd ?I)
	(package-install (intern pkg-name)))))
    (forward-line))
  (package-menu-revert))

(defun package-print-package (package version key desc)
  (let ((face
Chong Yidong's avatar
Chong Yidong committed
1433
	 (cond ((string= key "built-in") 'font-lock-builtin-face)
1434 1435 1436 1437 1438 1439 1440
	       ((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))
Chong Yidong's avatar
Chong Yidong committed
1441 1442 1443 1444 1445 1446 1447
    (insert-text-button (symbol-name package)
			'face 'link
			'follow-link t
			'package-symbol package
			'action (lambda (button)
				  (describe-package
				   (button-get button 'package-symbol))))
1448 1449
    (indent-to 20 1)
    (insert (propertize (package-version-join version) 'font-lock-face face))
Chong Yidong's avatar
Chong Yidong committed
1450
    (indent-to 32 1)
1451 1452 1453
    (insert (propertize key 'font-lock-face face))
    ;; FIXME: this 'when' is bogus...
    (when desc
Chong Yidong's avatar
Chong Yidong committed
1454
      (indent-to 43 1)
Chong Yidong's avatar
Chong Yidong committed
1455 1456 1457
      (let ((opoint (point)))
	(insert (propertize desc 'font-lock-face face))
	(upcase-region opoint (min (point) (1+ opoint)))))
1458 1459 1460 1461
    (insert "\n")))

(defun package-list-maybe-add (package version status description result)
  (unless (assoc (cons package version) result)
1462
    (push (list (cons package version) status description) result))
1463 1464
  result)

1465 1466 1467
(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.")
1468

1469 1470 1471 1472 1473 1474 1475 1476
(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."
  (package-initialize)
  (let ((inhibit-read-only t)
	info-list name desc hold builtin)
1477
    (erase-buffer)
1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514