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
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix profiles)
#:use-module (guix ui)
#:use-module (guix utils)
#:use-module (guix records)
#:use-module (guix derivations)
#:use-module (guix packages)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (ice-9 ftw)
#:use-module (ice-9 format)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:export (manifest make-manifest
manifest?
manifest-entries
<manifest-entry> ; FIXME: eventually make it internal
manifest-entry
manifest-entry?
manifest-entry-name
manifest-entry-version
manifest-entry-output
manifest-entry-item
manifest-entry-dependencies
manifest-pattern
manifest-pattern?
manifest-remove
manifest-add
manifest-lookup
manifest-installed?
manifest-matching-entries
manifest-transaction
manifest-transaction?
manifest-transaction-install
manifest-transaction-remove
manifest-perform-transaction
manifest-transaction-effects
manifest-show-transaction
profile-manifest
package->manifest-entry
profile-derivation
generation-number
generation-numbers
profile-generations
shifted-generation
previous-generation-number
generation-time
generation-file-name
switch-to-generation))
;;; Commentary:
;;;
;;; Tools to create and manipulate profiles---i.e., the representation of a
;;; set of installed packages.
;;;
;;; Code:
\f
;;;
;;; Manifests.
;;;
(define-record-type <manifest>
(manifest entries)
manifest?
(entries manifest-entries)) ; list of <manifest-entry>
;; Convenient alias, to avoid name clashes.
(define make-manifest manifest)
(define-record-type* <manifest-entry> manifest-entry
make-manifest-entry
manifest-entry?
(name manifest-entry-name) ; string
(version manifest-entry-version) ; string
(output manifest-entry-output ; string
(default "out"))
(item manifest-entry-item) ; package | store path
(dependencies manifest-entry-dependencies ; (store path | package)*
(default '())))
(define-record-type* <manifest-pattern> manifest-pattern
make-manifest-pattern
manifest-pattern?
(name manifest-pattern-name) ; string
(version manifest-pattern-version ; string | #f
(default #f))
(output manifest-pattern-output ; string | #f
(default "out")))
(define (profile-manifest profile)
"Return the PROFILE's manifest."
(let ((file (string-append profile "/manifest")))
(if (file-exists? file)
(call-with-input-file file read-manifest)
(manifest '()))))
(define* (package->manifest-entry package #:optional output)
"Return a manifest entry for the OUTPUT of package PACKAGE. When OUTPUT is
omitted or #f, use the first output of PACKAGE."
(let ((deps (map (match-lambda
((label package)
`(,package "out"))
((label package output)
`(,package ,output)))
(package-transitive-propagated-inputs package))))
(manifest-entry
(name (package-name package))
(version (package-version package))
(output (or output (car (package-outputs package))))
(item package)
(dependencies (delete-duplicates deps)))))
(define (manifest->gexp manifest)
"Return a representation of MANIFEST as a gexp."
(define (entry->gexp entry)
(match entry
(($ <manifest-entry> name version output (? string? path) (deps ...))
#~(#$name #$version #$output #$path #$deps))
(($ <manifest-entry> name version output (? package? package) (deps ...))
#~(#$name #$version #$output
(ungexp package (or output "out")) #$deps))))
(match manifest
(($ <manifest> (entries ...))
#~(manifest (version 1)
(packages #$(map entry->gexp entries))))))
(define (sexp->manifest sexp)
"Parse SEXP as a manifest."
(match sexp
(('manifest ('version 0)
('packages ((name version output path) ...)))
(manifest
(map (lambda (name version output path)
(manifest-entry
(name name)
(version version)
(output output)
(item path)))
name version output path)))
;; Version 1 adds a list of propagated inputs to the
;; name/version/output/path tuples.
(('manifest ('version 1)
('packages ((name version output path deps) ...)))
(manifest
(map (lambda (name version output path deps)
;; Up to Guix 0.7 included, dependencies were listed as ("gmp"
;; "/gnu/store/...-gmp") for instance. Discard the 'label' in
;; such lists.
(let ((deps (match deps
(((labels directories) ...)
directories)
((directories ...)
directories))))
(manifest-entry
(name name)
(version version)
(output output)
(item path)
(dependencies deps))))
name version output path deps)))
(_
(error "unsupported manifest format" manifest))))
(define (read-manifest port)
"Return the packages listed in MANIFEST."
(sexp->manifest (read port)))
(define (entry-predicate pattern)
"Return a procedure that returns #t when passed a manifest entry that
matches NAME/OUTPUT/VERSION. OUTPUT and VERSION may be #f, in which case they
are ignored."
(match pattern
(($ <manifest-pattern> name version output)
(match-lambda
(($ <manifest-entry> entry-name entry-version entry-output)
(and (string=? entry-name name)
(or (not entry-output) (not output)
(string=? entry-output output))
(or (not version)
(string=? entry-version version))))))))
(define (manifest-remove manifest patterns)
"Remove entries for each of PATTERNS from MANIFEST. Each item in PATTERNS
must be a manifest-pattern."
(define (remove-entry pattern lst)
(remove (entry-predicate pattern) lst))
(make-manifest (fold remove-entry
(manifest-entries manifest)
patterns)))
(define (manifest-add manifest entries)
"Add a list of manifest ENTRIES to MANIFEST and return new manifest.
Remove MANIFEST entries that have the same name and output as ENTRIES."
(define (same-entry? entry name output)
(match entry
(($ <manifest-entry> entry-name _ entry-output _ ...)
(and (equal? name entry-name)
(equal? output entry-output)))))
(make-manifest
(append entries
(fold (lambda (entry result)
(match entry
(($ <manifest-entry> name _ out _ ...)
(filter (negate (cut same-entry? <> name out))
result))))
(manifest-entries manifest)
entries))))
(define (manifest-lookup manifest pattern)
"Return the first item of MANIFEST that matches PATTERN, or #f if there is
no match.."
(find (entry-predicate pattern)
(manifest-entries manifest)))
(define (manifest-installed? manifest pattern)
"Return #t if MANIFEST has an entry matching PATTERN (a manifest-pattern),
#f otherwise."
(->bool (manifest-lookup manifest pattern)))
(define (manifest-matching-entries manifest patterns)
"Return all the entries of MANIFEST that match one of the PATTERNS."
(define predicates
(map entry-predicate patterns))
(define (matches? entry)
(any (lambda (pred)
(pred entry))
predicates))
(filter matches? (manifest-entries manifest)))
\f
;;;
;;; Manifest transactions.
;;;
(define-record-type* <manifest-transaction> manifest-transaction
make-manifest-transaction
manifest-transaction?
(install manifest-transaction-install ; list of <manifest-entry>
(default '()))
(remove manifest-transaction-remove ; list of <manifest-pattern>
(default '())))
(define (manifest-transaction-effects manifest transaction)
"Compute the effect of applying TRANSACTION to MANIFEST. Return 3 values:
the list of packages that would be removed, installed, or upgraded when
applying TRANSACTION to MANIFEST. Upgrades are represented as pairs where the
head is the entry being upgraded and the tail is the entry that will replace
it."
(define (manifest-entry->pattern entry)
(manifest-pattern
(name (manifest-entry-name entry))
(output (manifest-entry-output entry))))
(let loop ((input (manifest-transaction-install transaction))
(install '())
(upgrade '()))
(match input
(()
(let ((remove (manifest-transaction-remove transaction)))
(values (manifest-matching-entries manifest remove)
(reverse install) (reverse upgrade))))
((entry rest ...)
;; Check whether installing ENTRY corresponds to the installation of a
;; new package or to an upgrade.
;; XXX: When the exact same output directory is installed, we're not
;; really upgrading anything. Add a check for that case.
(let* ((pattern (manifest-entry->pattern entry))
(previous (manifest-lookup manifest pattern)))
(loop rest
(if previous install (cons entry install))
(if previous
(alist-cons previous entry upgrade)
upgrade)))))))
(define (manifest-perform-transaction manifest transaction)
"Perform TRANSACTION on MANIFEST and return new manifest."
(let ((install (manifest-transaction-install transaction))
(remove (manifest-transaction-remove transaction)))
(manifest-add (manifest-remove manifest remove)
install)))
(define (right-arrow port)
"Return either a string containing the 'RIGHT ARROW' character, or an ASCII
replacement if PORT is not Unicode-capable."
(with-fluids ((%default-port-encoding (port-encoding port)))
(let ((arrow "→"))
(catch 'encoding-error
(lambda ()
(call-with-output-string
(lambda (port)
(set-port-conversion-strategy! port 'error)
(display arrow port))))
(lambda (key . args)
"->")))))
(define* (manifest-show-transaction store manifest transaction
#:key dry-run?)
"Display what will/would be installed/removed from MANIFEST by TRANSACTION."
(define (package-strings name version output item)
(map (lambda (name version output item)
(format #f " ~a~:[:~a~;~*~]\t~a\t~a"
name
(equal? output "out") output version
(if (package? item)
(package-output store item output)
item)))
name version output item))
(define → ;an arrow that can be represented on stderr
(right-arrow (current-error-port)))
(define (upgrade-string name old-version new-version output item)
(format #f " ~a~:[:~a~;~*~]\t~a ~a ~a\t~a"
name (equal? output "out") output
old-version → new-version
(if (package? item)
(package-output store item output)
item)))
(let-values (((remove install upgrade)
(manifest-transaction-effects manifest transaction)))
(match remove
((($ <manifest-entry> name version output item) ..1)
(let ((len (length name))
(remove (package-strings name version output item)))
(if dry-run?
(format (current-error-port)
(N_ "The following package would be removed:~%~{~a~%~}~%"
"The following packages would be removed:~%~{~a~%~}~%"
len)
remove)
(format (current-error-port)
(N_ "The following package will be removed:~%~{~a~%~}~%"
"The following packages will be removed:~%~{~a~%~}~%"
len)
remove))))
(_ #f))
(match upgrade
(((($ <manifest-entry> name old-version)
. ($ <manifest-entry> _ new-version output item)) ..1)
(let ((len (length name))
(upgrade (map upgrade-string
name old-version new-version output item)))
(if dry-run?
(format (current-error-port)
(N_ "The following package would be upgraded:~%~{~a~%~}~%"
"The following packages would be upgraded:~%~{~a~%~}~%"
len)
upgrade)
(format (current-error-port)
(N_ "The following package will be upgraded:~%~{~a~%~}~%"
"The following packages will be upgraded:~%~{~a~%~}~%"
len)
upgrade))))
(_ #f))
(match install
((($ <manifest-entry> name version output item _) ..1)
(let ((len (length name))
(install (package-strings name version output item)))
(if dry-run?
(format (current-error-port)
(N_ "The following package would be installed:~%~{~a~%~}~%"
"The following packages would be installed:~%~{~a~%~}~%"
len)
install)
(format (current-error-port)
(N_ "The following package will be installed:~%~{~a~%~}~%"
"The following packages will be installed:~%~{~a~%~}~%"
len)
install))))
(_ #f))))
\f
;;;
;;; Profiles.
;;;
(define (manifest-inputs manifest)
"Return the list of inputs for MANIFEST. Each input has one of the
following forms:
(PACKAGE OUTPUT-NAME)
or
STORE-PATH
"
(append-map (match-lambda
(($ <manifest-entry> name version
output (? package? package) deps)
`((,package ,output) ,@deps))
(($ <manifest-entry> name version output path deps)
;; Assume PATH and DEPS are already valid.
`(,path ,@deps)))
(manifest-entries manifest)))
(define (info-dir-file manifest)
"Return a derivation that builds the 'dir' file for all the entries of
MANIFEST."
(define texinfo ;lazy reference
(module-ref (resolve-interface '(gnu packages texinfo)) 'texinfo))
(define gzip ;lazy reference
(module-ref (resolve-interface '(gnu packages compression)) 'gzip))
(define build
#~(begin
(use-modules (guix build utils)
(srfi srfi-1) (srfi srfi-26)
(ice-9 ftw))
(define (info-file? file)
(or (string-suffix? ".info" file)
(string-suffix? ".info.gz" file)))
(define (info-files top)
(let ((infodir (string-append top "/share/info")))
(map (cut string-append infodir "/" <>)
(or (scandir infodir info-file?) '()))))
(define (install-info info)
(setenv "PATH" (string-append #+gzip "/bin")) ;for info.gz files
(zero?
(system* (string-append #+texinfo "/bin/install-info")
info (string-append #$output "/share/info/dir"))))
(mkdir-p (string-append #$output "/share/info"))
(every install-info
(append-map info-files
'#$(manifest-inputs manifest)))))
;; Don't depend on Texinfo when there's nothing to do.
(if (null? (manifest-entries manifest))
(gexp->derivation "info-dir" #~(mkdir #$output))
(gexp->derivation "info-dir" build
#:modules '((guix build utils)))))
(define* (profile-derivation manifest #:key (info-dir? #t))
"Return a derivation that builds a profile (aka. 'user environment') with
the given MANIFEST. The profile includes a top-level Info 'dir' file, unless
INFO-DIR? is #f."
(mlet %store-monad ((info-dir (if info-dir?
(info-dir-file manifest)
(return #f))))
(define inputs
(if info-dir
(cons info-dir (manifest-inputs manifest))
(manifest-inputs manifest)))
(define builder
#~(begin
(use-modules (ice-9 pretty-print)
(guix build union))
(setvbuf (current-output-port) _IOLBF)
(setvbuf (current-error-port) _IOLBF)
(union-build #$output '#$inputs
#:log-port (%make-void-port "w"))
(call-with-output-file (string-append #$output "/manifest")
(lambda (p)
(pretty-print '#$(manifest->gexp manifest) p)))))
(gexp->derivation "profile" builder
#:modules '((guix build union))
#:local-build? #t)))
(define (profile-regexp profile)
"Return a regular expression that matches PROFILE's name and number."
(make-regexp (string-append "^" (regexp-quote (basename profile))
"-([0-9]+)")))
(define (generation-number profile)
"Return PROFILE's number or 0. An absolute file name must be used."
(or (and=> (false-if-exception (regexp-exec (profile-regexp profile)
(basename (readlink profile))))
(compose string->number (cut match:substring <> 1)))
0))
(define (generation-numbers profile)
"Return the sorted list of generation numbers of PROFILE, or '(0) if no
former profiles were found."
(define* (scandir name #:optional (select? (const #t))
(entry<? (@ (ice-9 i18n) string-locale<?)))
;; XXX: Bug-fix version introduced in Guile v2.0.6-62-g139ce19.
(define (enter? dir stat result)
(and stat (string=? dir name)))
(define (visit basename result)
(if (select? basename)
(cons basename result)
result))
(define (leaf name stat result)
(and result
(visit (basename name) result)))
(define (down name stat result)
(visit "." '()))
(define (up name stat result)
(visit ".." result))
(define (skip name stat result)
;; All the sub-directories are skipped.
(visit (basename name) result))
(define (error name* stat errno result)
(if (string=? name name*) ; top-level NAME is unreadable
result
(visit (basename name*) result)))
(and=> (file-system-fold enter? leaf down up skip error #f name lstat)
(lambda (files)
(sort files entry<?))))
(match (scandir (dirname profile)
(cute regexp-exec (profile-regexp profile) <>))
(#f ; no profile directory
'(0))
(() ; no profiles
'(0))
((profiles ...) ; former profiles around
(sort (map (compose string->number
(cut match:substring <> 1)
(cute regexp-exec (profile-regexp profile) <>))
profiles)
<))))
(define (profile-generations profile)
"Return a list of PROFILE's generations."
(let ((generations (generation-numbers profile)))
(if (equal? generations '(0))
'()
generations)))
(define* (shifted-generation profile shift
#:optional (current (generation-number profile)))
"Return PROFILE's generation shifted from the CURRENT generation by SHIFT.
SHIFT is a positive or negative number.
Return #f if there is no such generation."
(let* ((abs-shift (abs shift))
(numbers (profile-generations profile))
(from-current (memq current
(if (negative? shift)
(reverse numbers)
numbers))))
(and from-current
(< abs-shift (length from-current))
(list-ref from-current abs-shift))))
(define (previous-generation-number profile number)
"Return the number of the generation before generation NUMBER of
PROFILE, or 0 if none exists. It could be NUMBER - 1, but it's not the
case when generations have been deleted (there are \"holes\")."
(fold (lambda (candidate highest)
(if (and (< candidate number) (> candidate highest))
candidate
highest))
0
(generation-numbers profile)))
(define (generation-file-name profile generation)
"Return the file name for PROFILE's GENERATION."
(format #f "~a-~a-link" profile generation))
(define (generation-time profile number)
"Return the creation time of a generation in the UTC format."
(make-time time-utc 0
(stat:ctime (stat (generation-file-name profile number)))))
(define (switch-to-generation profile number)
"Atomically switch PROFILE to the generation NUMBER."
(let ((current (generation-number profile))
(file (generation-file-name profile number)))
(cond ((not (file-exists? profile))
(format (current-error-port)
(_ "profile '~a' does not exist~%")
profile))
((not (file-exists? file))
(format (current-error-port)
(_ "generation ~a does not exist~%")
number))
(else
(format #t (_ "switching from generation ~a to ~a~%")
current number)
(switch-symlinks profile file)))))
;;; profiles.scm ends here
|