forked from technomancy/emacs-starter-kit
-
Notifications
You must be signed in to change notification settings - Fork 1
/
package.el
1700 lines (1557 loc) · 62.7 KB
/
package.el
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
55
56
57
58
59
60
61
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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
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
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
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
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
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
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
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
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
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
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;;; package.el --- Simple package system for Emacs
;; Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
;; Author: Tom Tromey <[email protected]>
;; 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 <[email protected]>
;; Karl Fogel <[email protected]>
;; Kevin Ryde <[email protected]>
;; Lawrence Mitchell
;; Michael Olson <[email protected]>
;; Sebastian Tennant <[email protected]>
;; Stefan Monnier <[email protected]>
;; Vinicius Jose Latorre <[email protected]>
;; Phil Hagelberg <[email protected]>
;;; 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 . 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")
(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]+\\)*\\)$"
"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)
"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 excl)
(let ((buffer-file-coding-system 'no-conversion))
(write-region (point-min) (point-max) file-name nil nil nil excl)))
(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)
nil)
(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)
(package--write-file-no-coding el-file 'excl)
(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)))))
(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
(concat (package-archive-url name)
(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
(concat (package-archive-url name)
(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))))
(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 ton 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 (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.]*$" v-str)
v-str))))
(defun package-buffer-info ()
"Return a vector describing the package in the current buffer.
The vector has the form
[FILENAME REQUIRES DESCRIPTION VERSION COMMENTARY]
FILENAME is the file name, a string, sans the \".el\" extension.
REQUIRES is a requires list, or nil.
DESCRIPTION is the package description, a string.
VERSION is the version, a string.
COMMENTARY is the commentary section, a string, or nil if none.
If the buffer does not contain a conforming package, signal an
error. If there is a package, narrow the buffer to the file's
boundaries."
(goto-char (point-min))
(unless (re-search-forward "^;;; \\([^ ]*\\)\\.el --- \\(.*\\)$" 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'."
(unless (string-match "^\\(.+\\)-\\([0-9.]+\\)\\.tar$" file)
(error "Invalid package name `%s'" file))
(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)
(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-url (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)
"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))