aboutsummaryrefslogtreecommitdiff
path: root/guix/scripts/pack.scm
blob: 1916f3b9d76b5881e743f0f27c8bd5cbc4edaf6c (plain)
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
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017, 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2018 Konrad Hinsen <konrad.hinsen@fastmail.net>
;;; Copyright © 2018 Chris Marusich <cmmarusich@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 scripts pack)
  #:use-module (guix scripts)
  #:use-module (guix ui)
  #:use-module (guix gexp)
  #:use-module (guix utils)
  #:use-module (guix store)
  #:use-module (guix grafts)
  #:use-module (guix monads)
  #:use-module (guix modules)
  #:use-module (guix packages)
  #:use-module (guix profiles)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system gnu)
  #:use-module (guix scripts build)
  #:use-module ((guix self) #:select (make-config.scm))
  #:use-module (gnu packages)
  #:use-module (gnu packages bootstrap)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages base)
  #:autoload   (gnu packages package-management) (guix)
  #:autoload   (gnu packages gnupg) (guile-gcrypt)
  #:autoload   (gnu packages guile) (guile2.0-json guile-json)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-9)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-37)
  #:use-module (ice-9 match)
  #:export (compressor?
            lookup-compressor
            self-contained-tarball
            guix-pack))

;; Type of a compression tool.
(define-record-type <compressor>
  (compressor name extension command)
  compressor?
  (name       compressor-name)      ;string (e.g., "gzip")
  (extension  compressor-extension) ;string (e.g., ".lz")
  (command    compressor-command))  ;gexp (e.g., #~("/gnu/store/…/gzip" "-9n"))

(define %compressors
  ;; Available compression tools.
  (list (compressor "gzip"  ".gz"
                    #~(#+(file-append gzip "/bin/gzip") "-9n"))
        (compressor "lzip"  ".lz"
                    #~(#+(file-append lzip "/bin/lzip") "-9"))
        (compressor "xz"    ".xz"
                    #~(#+(file-append xz "/bin/xz") "-e"))
        (compressor "bzip2" ".bz2"
                    #~(#+(file-append bzip2 "/bin/bzip2") "-9"))
        (compressor "none" "" #f)))

;; This one is only for use in this module, so don't put it in %compressors.
(define bootstrap-xz
  (compressor "bootstrap-xz" ".xz"
              #~(#+(file-append %bootstrap-coreutils&co "/bin/xz") "-e")))

(define (lookup-compressor name)
  "Return the compressor object called NAME.  Error out if it could not be
found."
  (or (find (match-lambda
              (($ <compressor> name*)
               (string=? name* name)))
            %compressors)
      (leave (G_ "~a: compressor not found~%") name)))

(define not-config?
  ;; Select (guix …) and (gnu …) modules, except (guix config).
  (match-lambda
    (('guix 'config) #f)
    (('guix _ ...) #t)
    (('gnu _ ...) #t)
    (_ #f)))

(define gcrypt-sqlite3&co
  ;; Guile-Gcrypt, Guile-SQLite3, and their propagated inputs.
  (append-map (lambda (package)
                (cons package
                      (package-transitive-propagated-inputs package)))
              (list guile-gcrypt guile-sqlite3)))

(define* (self-contained-tarball name profile
                                 #:key target
                                 deduplicate?
                                 (compressor (first %compressors))
                                 localstatedir?
                                 (symlinks '())
                                 (archiver tar))
  "Return a self-contained tarball containing a store initialized with the
closure of PROFILE, a derivation.  The tarball contains /gnu/store; if
LOCALSTATEDIR? is true, it also contains /var/guix, including /var/guix/db
with a properly initialized store database.

SYMLINKS must be a list of (SOURCE -> TARGET) tuples denoting symlinks to be
added to the pack."
  (define libgcrypt
    (module-ref (resolve-interface '(gnu packages gnupg))
                'libgcrypt))

  (define schema
    (and localstatedir?
         (local-file (search-path %load-path
                                  "guix/store/schema.sql"))))

  (define build
    (with-imported-modules `(((guix config) => ,(make-config.scm))
                             ,@(source-module-closure
                                `((guix build utils)
                                  (guix build union)
                                  (guix build store-copy)
                                  (gnu build install))
                                #:select? not-config?))
      (with-extensions gcrypt-sqlite3&co
        #~(begin
            (use-modules (guix build utils)
                         ((guix build union) #:select (relative-file-name))
                         (gnu build install)
                         (srfi srfi-1)
                         (srfi srfi-26)
                         (ice-9 match))

            (define %root "root")

            (define symlink->directives
              ;; Return "populate directives" to make the given symlink and its
              ;; parent directories.
              (match-lambda
                ((source '-> target)
                 (let ((target (string-append #$profile "/" target))
                       (parent (dirname source)))
                   ;; Never add a 'directory' directive for "/" so as to
                   ;; preserve its ownnership when extracting the archive (see
                   ;; below), and also because this would lead to adding the
                   ;; same entries twice in the tarball.
                   `(,@(if (string=? parent "/")
                           '()
                           `((directory ,parent)))
                     (,source
                      -> ,(relative-file-name parent target)))))))

            (define directives
              ;; Fully-qualified symlinks.
              (append-map symlink->directives '#$symlinks))

            ;; The --sort option was added to GNU tar in version 1.28, released
            ;; 2014-07-28.  For testing, we use the bootstrap tar, which is
            ;; older and doesn't support it.
            (define tar-supports-sort?
              (zero? (system* (string-append #+archiver "/bin/tar")
                              "cf" "/dev/null" "--files-from=/dev/null"
                              "--sort=name")))

            ;; Add 'tar' to the search path.
            (setenv "PATH" #+(file-append archiver "/bin"))

            ;; Note: there is not much to gain here with deduplication and there
            ;; is the overhead of the '.links' directory, so turn it off.
            ;; Furthermore GNU tar < 1.30 sometimes fails to extract tarballs
            ;; with hard links:
            ;; <http://lists.gnu.org/archive/html/bug-tar/2017-11/msg00009.html>.
            (populate-single-profile-directory %root
                                               #:profile #$profile
                                               #:closure "profile"
                                               #:deduplicate? #f
                                               #:register? #$localstatedir?
                                               #:schema #$schema)

            ;; Create SYMLINKS.
            (for-each (cut evaluate-populate-directive <> %root)
                      directives)

            ;; Create the tarball.  Use GNU format so there's no file name
            ;; length limitation.
            (with-directory-excursion %root
              (exit
               (zero? (apply system* "tar"
                             "-I"
                             (string-join '#+(compressor-command compressor))
                             "--format=gnu"

                             ;; Avoid non-determinism in the archive.  Use
                             ;; mtime = 1, not zero, because that is what the
                             ;; daemon does for files in the store (see the
                             ;; 'mtimeStore' constant in local-store.cc.)
                             (if tar-supports-sort? "--sort=name" "--mtime=@1")
                             "--mtime=@1"         ;for files in /var/guix
                             "--owner=root:0"
                             "--group=root:0"

                             "--check-links"
                             "-cvf" #$output
                             ;; Avoid adding / and /var to the tarball, so
                             ;; that the ownership and permissions of those
                             ;; directories will not be overwritten when
                             ;; extracting the archive.  Do not include /root
                             ;; because the root account might have a
                             ;; different home directory.
                             #$@(if localstatedir?
                                    '("./var/guix")
                                    '())

                             (string-append "." (%store-directory))

                             (delete-duplicates
                              (filter-map (match-lambda
                                            (('directory directory)
                                             (string-append "." directory))
                                            ((source '-> _)
                                             (string-append "." source))
                                            (_ #f))
                                          directives))))))))))

  (gexp->derivation (string-append name ".tar"
                                   (compressor-extension compressor))
                    build
                    #:references-graphs `(("profile" ,profile))))

(define* (squashfs-image name profile
                         #:key target
                         deduplicate?
                         (compressor (first %compressors))
                         localstatedir?
                         (symlinks '())
                         (archiver squashfs-tools-next))
  "Return a squashfs image containing a store initialized with the closure of
PROFILE, a derivation.  The image contains a subset of /gnu/store, empty mount
points for virtual file systems (like procfs), and optional symlinks.

SYMLINKS must be a list of (SOURCE -> TARGET) tuples denoting symlinks to be
added to the pack."
  (define build
    (with-imported-modules `(((guix config) => ,(make-config.scm))
                             ,@(source-module-closure
                                '((guix build utils)
                                  (guix build store-copy)
                                  (gnu build install))
                                #:select? not-config?))
      (with-extensions gcrypt-sqlite3&co
        #~(begin
            (use-modules (guix build utils)
                         (gnu build install)
                         (guix build store-copy)
                         (srfi srfi-1)
                         (srfi srfi-26)
                         (ice-9 match))

            (setenv "PATH" (string-append #$archiver "/bin"))

            ;; We need an empty file in order to have a valid file argument when
            ;; we reparent the root file system.  Read on for why that's
            ;; necessary.
            (with-output-to-file ".empty" (lambda () (display "")))

            ;; Create the squashfs image in several steps.
            ;; Add all store items.  Unfortunately mksquashfs throws away all
            ;; ancestor directories and only keeps the basename.  We fix this
            ;; in the following invocations of mksquashfs.
            (apply invoke "mksquashfs"
                   `(,@(map store-info-item
                            (call-with-input-file "profile"
                              read-reference-graph))
                     ,#$output

                     ;; Do not perform duplicate checking because we
                     ;; don't have any dupes.
                     "-no-duplicates"
                     "-comp"
                     ,#+(compressor-name compressor)))

            ;; Here we reparent the store items.  For each sub-directory of
            ;; the store prefix we need one invocation of "mksquashfs".
            (for-each (lambda (dir)
                        (apply invoke "mksquashfs"
                               `(".empty"
                                 ,#$output
                                 "-root-becomes" ,dir)))
                      (reverse (string-tokenize (%store-directory)
                                                (char-set-complement (char-set #\/)))))

            ;; Add symlinks and mount points.
            (apply invoke "mksquashfs"
                   `(".empty"
                     ,#$output
                     ;; Create SYMLINKS via pseudo file definitions.
                     ,@(append-map
                        (match-lambda
                          ((source '-> target)
                           (list "-p"
                                 (string-join
                                  ;; name s mode uid gid symlink
                                  (list source
                                        "s" "777" "0" "0"
                                        (string-append #$profile "/" target))))))
                        '#$symlinks)

                     ;; Create empty mount points.
                     "-p" "/proc d 555 0 0"
                     "-p" "/sys d 555 0 0"
                     "-p" "/dev d 555 0 0"))))))

  (gexp->derivation (string-append name
                                   (compressor-extension compressor)
                                   ".squashfs")
                    build
                    #:references-graphs `(("profile" ,profile))))

(define* (docker-image name profile
                       #:key target
                       deduplicate?
                       (compressor (first %compressors))
                       localstatedir?
                       (symlinks '())
                       (archiver tar))
  "Return a derivation to construct a Docker image of PROFILE.  The
image is a tarball conforming to the Docker Image Specification, compressed
with COMPRESSOR.  It can be passed to 'docker load'.  If TARGET is true, it
must a be a GNU triplet and it is used to derive the architecture metadata in
the image."
  (define defmod 'define-module)                  ;trick Geiser

  (define build
    ;; Guile-JSON and Guile-Gcrypt are required by (guix docker).
    (with-extensions (list guile-json guile-gcrypt)
      (with-imported-modules (source-module-closure '((guix docker)
                                                      (guix build store-copy))
                                                    #:select? not-config?)
        #~(begin
            (use-modules (guix docker) (srfi srfi-19) (guix build store-copy))

            (setenv "PATH" (string-append #$archiver "/bin"))

            (build-docker-image #$output
                                (map store-info-item
                                     (call-with-input-file "profile"
                                       read-reference-graph))
                                #$profile
                                #:system (or #$target (utsname:machine (uname)))
                                #:symlinks '#$symlinks
                                #:compressor '#$(compressor-command compressor)
                                #:creation-time (make-time time-utc 0 1))))))

  (gexp->derivation (string-append name ".tar"
                                   (compressor-extension compressor))
                    build
                    #:references-graphs `(("profile" ,profile))))


;;;
;;; Compiling C programs.
;;;

;; A C compiler.  That lowers to a single program that can be passed typical C
;; compiler flags, and it makes sure the whole toolchain is available.
(define-record-type <c-compiler>
  (%c-compiler toolchain guile)
  c-compiler?
  (toolchain c-compiler-toolchain)
  (guile     c-compiler-guile))

(define* (c-compiler #:optional inputs
                     #:key (guile (default-guile)))
  (%c-compiler inputs guile))

(define (bootstrap-c-compiler)
  "Return the C compiler that uses the bootstrap toolchain.  This is used only
by '--bootstrap', for testing purposes."
  (define bootstrap-toolchain
    (list (first (assoc-ref %bootstrap-inputs "gcc"))
          (first (assoc-ref %bootstrap-inputs "binutils"))
          (first (assoc-ref %bootstrap-inputs "libc"))))

  (c-compiler bootstrap-toolchain
              #:guile %bootstrap-guile))

(define-gexp-compiler (c-compiler-compiler (compiler <c-compiler>) system target)
  "Lower COMPILER to a single script that does the right thing."
  (define toolchain
    (or (c-compiler-toolchain compiler)
        (list (first (assoc-ref (standard-packages) "gcc"))
              (first (assoc-ref (standard-packages) "ld-wrapper"))
              (first (assoc-ref (standard-packages) "binutils"))
              (first (assoc-ref (standard-packages) "libc"))
              (gexp-input (first (assoc-ref (standard-packages) "libc"))
                          "static"))))

  (define inputs
    (match (append-map package-propagated-inputs
                       (filter package? toolchain))
      (((labels things . _) ...)
       (append toolchain things))))

  (define search-paths
    (cons $PATH
          (append-map package-native-search-paths
                      (filter package? inputs))))

  (define run
    (with-imported-modules (source-module-closure
                            '((guix build utils)
                              (guix search-paths)))
      #~(begin
          (use-modules (guix build utils) (guix search-paths)
                       (ice-9 match))

          (define (output-file args)
            (let loop ((args args))
              (match args
                (() "a.out")
                (("-o" file _ ...) file)
                ((head rest ...) (loop rest)))))

          (set-search-paths (map sexp->search-path-specification
                                 '#$(map search-path-specification->sexp
                                         search-paths))
                            '#$inputs)

          (let ((output (output-file (command-line))))
            (apply invoke "gcc" (cdr (command-line)))
            (invoke "strip" output)))))

  (when target
    ;; TODO: Yep, we'll have to do it someday!
    (leave (G_ "cross-compilation not implemented here;
please email '~a'~%")
           (@ (guix config) %guix-bug-report-address)))

  (gexp->script "c-compiler" run
                #:guile (c-compiler-guile compiler)))


;;;
;;; Wrapped package.
;;;

(define* (wrapped-package package
                          #:optional (compiler (c-compiler)))
  (define runner
    (local-file (search-auxiliary-file "run-in-namespace.c")))

  (define build
    (with-imported-modules (source-module-closure
                            '((guix build utils)
                              (guix build union)))
      #~(begin
          (use-modules (guix build utils)
                       ((guix build union) #:select (relative-file-name))
                       (ice-9 ftw)
                       (ice-9 match))

          (define (strip-store-prefix file)
            ;; Given a file name like "/gnu/store/…-foo-1.2/bin/foo", return
            ;; "/bin/foo".
            (let* ((len  (string-length (%store-directory)))
                   (base (string-drop file (+ 1 len))))
              (match (string-index base #\/)
                (#f    base)
                (index (string-drop base index)))))

          (define (build-wrapper program)
            ;; Build a user-namespace wrapper for PROGRAM.
            (format #t "building wrapper for '~a'...~%" program)
            (copy-file #$runner "run.c")

            (substitute* "run.c"
              (("@WRAPPED_PROGRAM@") program)
              (("@STORE_DIRECTORY@") (%store-directory)))

            (let* ((base   (strip-store-prefix program))
                   (result (string-append #$output "/" base)))
              (mkdir-p (dirname result))
              (invoke #$compiler "-std=gnu99" "-static" "-Os" "-g0" "-Wall"
                      "run.c" "-o" result)
              (delete-file "run.c")))

          (setvbuf (current-output-port)
                   (cond-expand (guile-2.2 'line)
                                (else      _IOLBF)))

          ;; Link the top-level files of PACKAGE so that search paths are
          ;; properly defined in PROFILE/etc/profile.
          (mkdir #$output)
          (for-each (lambda (file)
                      (unless (member file '("." ".." "bin" "sbin" "libexec"))
                        (let ((file* (string-append #$package "/" file)))
                          (symlink (relative-file-name #$output file*)
                                   (string-append #$output "/" file)))))
                    (scandir #$package))

          (for-each build-wrapper
                    (append (find-files #$(file-append package "/bin"))
                            (find-files #$(file-append package "/sbin"))
                            (find-files #$(file-append package "/libexec")))))))

  (computed-file (string-append (package-full-name package "-") "R")
                 build))

(define (map-manifest-entries proc manifest)
  "Apply PROC to all the entries of MANIFEST and return a new manifest."
  (make-manifest
   (map (lambda (entry)
          (manifest-entry
            (inherit entry)
            (item (proc (manifest-entry-item entry)))))
        (manifest-entries manifest))))


;;;
;;; Command-line options.
;;;

(define %default-options
  ;; Alist of default option values.
  `((format . tarball)
    (system . ,(%current-system))
    (substitutes? . #t)
    (build-hook? . #t)
    (graft? . #t)
    (verbosity . 0)
    (symlinks . ())
    (compressor . ,(first %compressors))))

(define %formats
  ;; Supported pack formats.
  `((tarball . ,self-contained-tarball)
    (squashfs . ,squashfs-image)
    (docker  . ,docker-image)))

(define %options
  ;; Specifications of the command-line options.
  (cons* (option '(#\h "help") #f #f
                 (lambda args
                   (show-help)
                   (exit 0)))
         (option '(#\V "version") #f #f
                 (lambda args
                   (show-version-and-exit "guix pack")))

         (option '(#\n "dry-run") #f #f
                 (lambda (opt name arg result)
                   (alist-cons 'dry-run? #t (alist-cons 'graft? #f result))))
         (option '(#\f "format") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'format (string->symbol arg) result)))
         (option '(#\R "relocatable") #f #f
                 (lambda (opt name arg result)
                   (alist-cons 'relocatable? #t result)))
         (option '(#\e "expression") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'expression arg result)))
         (option '(#\m "manifest") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'manifest arg result)))
         (option '(#\s "system") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'system arg
                               (alist-delete 'system result eq?))))
         (option '("target") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'target arg
                               (alist-delete 'target result eq?))))
         (option '(#\C "compression") #t #f
                 (lambda (opt name arg result)
                   (alist-cons 'compressor (lookup-compressor arg)
                               result)))
         (option '(#\S "symlink") #t #f
                 (lambda (opt name arg result)
                   ;; Note: Using 'string-split' allows us to handle empty
                   ;; TARGET (as in "/opt/guile=", meaning that /opt/guile is
                   ;; a symlink to the profile) correctly.
                   (match (string-split arg (char-set #\=))
                     ((source target)
                      (let ((symlinks (assoc-ref result 'symlinks)))
                        (alist-cons 'symlinks
                                    `((,source -> ,target) ,@symlinks)
                                    (alist-delete 'symlinks result eq?))))
                     (x
                      (leave (G_ "~a: invalid symlink specification~%")
                             arg)))))
         (option '("localstatedir") #f #f
                 (lambda (opt name arg result)
                   (alist-cons 'localstatedir? #t result)))
         (option '("bootstrap") #f #f
                 (lambda (opt name arg result)
                   (alist-cons 'bootstrap? #t result)))

         (append %transformation-options
                 %standard-build-options)))

(define (show-help)
  (display (G_ "Usage: guix pack [OPTION]... PACKAGE...
Create a bundle of PACKAGE.\n"))
  (show-build-options-help)
  (newline)
  (show-transformation-options-help)
  (newline)
  (display (G_ "
  -f, --format=FORMAT    build a pack in the given FORMAT"))
  (display (G_ "
  -R, --relocatable      produce relocatable executables"))
  (display (G_ "
  -e, --expression=EXPR  consider the package EXPR evaluates to"))
  (display (G_ "
  -s, --system=SYSTEM    attempt to build for SYSTEM--e.g., \"i686-linux\""))
  (display (G_ "
      --target=TRIPLET   cross-build for TRIPLET--e.g., \"armel-linux-gnu\""))
  (display (G_ "
  -C, --compression=TOOL compress using TOOL--e.g., \"lzip\""))
  (display (G_ "
  -S, --symlink=SPEC     create symlinks to the profile according to SPEC"))
  (display (G_ "
  -m, --manifest=FILE    create a pack with the manifest from FILE"))
  (display (G_ "
      --localstatedir    include /var/guix in the resulting pack"))
  (display (G_ "
      --bootstrap        use the bootstrap binaries to build the pack"))
  (newline)
  (display (G_ "
  -h, --help             display this help and exit"))
  (display (G_ "
  -V, --version          display version information and exit"))
  (newline)
  (show-bug-report-information))


;;;
;;; Entry point.
;;;

(define (guix-pack . args)
  (define opts
    (parse-command-line args %options (list %default-options)))

  (define maybe-package-argument
    ;; Given an option pair, return a package, a package/output tuple, or #f.
    (match-lambda
      (('argument . spec)
       (call-with-values
           (lambda ()
             (specification->package+output spec))
         list))
      (('expression . exp)
       (read/eval-package-expression exp))
      (x #f)))

  (define (manifest-from-args store opts)
    (let* ((transform     (options->transformation opts))
           (packages      (map (match-lambda
                                 (((? package? package) output)
                                  (list (transform store package) output))
                                 ((? package? package)
                                  (list (transform store package) "out")))
                               (filter-map maybe-package-argument opts)))
           (manifest-file (assoc-ref opts 'manifest)))
      (cond
       ((and manifest-file (not (null? packages)))
        (leave (G_ "both a manifest and a package list were given~%")))
       (manifest-file
        (let ((user-module (make-user-module '((guix profiles) (gnu)))))
          (load* manifest-file user-module)))
       (else (packages->manifest packages)))))

  (with-error-handling
    (with-store store
      ;; Set the build options before we do anything else.
      (set-build-options-from-command-line store opts)

      (parameterize ((%graft? (assoc-ref opts 'graft?))
                     (%guile-for-build (package-derivation
                                        store
                                        (if (assoc-ref opts 'bootstrap?)
                                            %bootstrap-guile
                                            (canonical-package guile-2.2))
                                        (assoc-ref opts 'system)
                                        #:graft? (assoc-ref opts 'graft?))))
        (let* ((dry-run?    (assoc-ref opts 'dry-run?))
               (relocatable? (assoc-ref opts 'relocatable?))
               (manifest    (let ((manifest (manifest-from-args store opts)))
                              ;; Note: We cannot honor '--bootstrap' here because
                              ;; 'glibc-bootstrap' lacks 'libc.a'.
                              (if relocatable?
                                  (map-manifest-entries wrapped-package manifest)
                                  manifest)))
               (pack-format (assoc-ref opts 'format))
               (name        (string-append (symbol->string pack-format)
                                           "-pack"))
               (target      (assoc-ref opts 'target))
               (bootstrap?  (assoc-ref opts 'bootstrap?))
               (compressor  (if bootstrap?
                                bootstrap-xz
                                (assoc-ref opts 'compressor)))
               (archiver    (if (equal? pack-format 'squashfs)
                                squashfs-tools-next
                                (if bootstrap?
                                    %bootstrap-coreutils&co
                                    tar)))
               (symlinks    (assoc-ref opts 'symlinks))
               (build-image (match (assq-ref %formats pack-format)
                              ((? procedure? proc) proc)
                              (#f
                               (leave (G_ "~a: unknown pack format~%")
                                      pack-format))))
               (localstatedir? (assoc-ref opts 'localstatedir?)))
          (run-with-store store
            (mlet* %store-monad ((profile (profile-derivation
                                           manifest
                                           #:relative-symlinks? relocatable?
                                           #:hooks (if bootstrap?
                                                       '()
                                                       %default-profile-hooks)
                                           #:locales? (not bootstrap?)
                                           #:target target))
                                 (drv (build-image name profile
                                                   #:target
                                                   target
                                                   #:compressor
                                                   compressor
                                                   #:symlinks
                                                   symlinks
                                                   #:localstatedir?
                                                   localstatedir?
                                                   #:archiver
                                                   archiver)))
              (mbegin %store-monad
                (show-what-to-build* (list drv)
                                     #:use-substitutes?
                                     (assoc-ref opts 'substitutes?)
                                     #:dry-run? dry-run?)
                (munless dry-run?
                  (built-derivations (list drv))
                  (return (format #t "~a~%"
                                  (derivation->output-path drv))))))
            #:system (assoc-ref opts 'system)))))))