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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
;;; Copyright © 2015 Mathieu Lirzin <mthl@openmailbox.org>
;;; Copyright © 2014 Deck Pickard <deck.r.pickard@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 ui)
#:use-module (guix utils)
#:use-module (guix store)
#:use-module (guix config)
#:use-module (guix packages)
#:use-module (guix profiles)
#:use-module (guix derivations)
#:use-module (guix build-system)
#:use-module (guix serialization)
#:use-module ((guix build utils) #:select (mkdir-p))
#:use-module ((guix licenses) #:select (license? license-name))
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-31)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-37)
#:autoload (ice-9 ftw) (scandir)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:use-module (ice-9 regex)
#:autoload (system repl repl) (start-repl)
#:autoload (system repl debug) (make-debug stack->vector)
#:use-module (texinfo)
#:use-module (texinfo plain-text)
#:use-module (texinfo string-utils)
#:export (_
N_
P_
report-error
leave
make-user-module
load*
warn-about-load-error
show-version-and-exit
show-bug-report-information
string->number*
size->number
show-what-to-build
show-what-to-build*
show-manifest-transaction
call-with-error-handling
with-error-handling
leave-on-EPIPE
read/eval
read/eval-package-expression
location->string
switch-symlinks
config-directory
fill-paragraph
package-description-string
string->recutils
package->recutils
package-specification->name+version+output
string->generations
string->duration
args-fold*
parse-command-line
run-guix-command
run-guix
program-name
guix-warning-port
warning
guix-main))
;;; Commentary:
;;;
;;; User interface facilities for command-line tools.
;;;
;;; Code:
(define %gettext-domain
;; Text domain for strings used in the tools.
"guix")
(define %package-text-domain
;; Text domain for package synopses and descriptions.
"guix-packages")
(define _ (cut gettext <> %gettext-domain))
(define N_ (cut ngettext <> <> <> %gettext-domain))
(define P_ (cut gettext <> %package-text-domain))
(define-syntax-rule (define-diagnostic name prefix)
"Create a diagnostic macro (i.e., NAME), which will prepend PREFIX to all
messages."
(define-syntax name
(lambda (x)
(define (augmented-format-string fmt)
(string-append "~:[~*~;guix ~a: ~]~a" (syntax->datum fmt)))
(syntax-case x ()
((name (underscore fmt) args (... ...))
(and (string? (syntax->datum #'fmt))
(free-identifier=? #'underscore #'_))
(with-syntax ((fmt* (augmented-format-string #'fmt))
(prefix (datum->syntax x prefix)))
#'(format (guix-warning-port) (gettext fmt*)
(program-name) (program-name) prefix
args (... ...))))
((name (N-underscore singular plural n) args (... ...))
(and (string? (syntax->datum #'singular))
(string? (syntax->datum #'plural))
(free-identifier=? #'N-underscore #'N_))
(with-syntax ((s (augmented-format-string #'singular))
(p (augmented-format-string #'plural))
(prefix (datum->syntax x prefix)))
#'(format (guix-warning-port)
(ngettext s p n %gettext-domain)
(program-name) (program-name) prefix
args (... ...))))))))
(define-diagnostic warning "warning: ") ; emit a warning
(define-diagnostic report-error "error: ")
(define-syntax-rule (leave args ...)
"Emit an error message and exit."
(begin
(report-error args ...)
(exit 1)))
(define (make-user-module modules)
"Return a new user module with the additional MODULES loaded."
;; Module in which the machine description file is loaded.
(let ((module (make-fresh-user-module)))
(for-each (lambda (iface)
(module-use! module (resolve-interface iface)))
modules)
module))
(define* (load* file user-module
#:key (on-error 'nothing-special))
"Load the user provided Scheme source code FILE."
(define (frame-with-source frame)
;; Walk from FRAME upwards until source location information is found.
(let loop ((frame frame)
(previous frame))
(if (not frame)
previous
(if (frame-source frame)
frame
(loop (frame-previous frame) frame)))))
(define (error-string frame args)
(call-with-output-string
(lambda (port)
(apply display-error frame port (cdr args)))))
(define tag
(make-prompt-tag "user-code"))
(catch #t
(lambda ()
;; XXX: Force a recompilation to avoid ABI issues.
(set! %fresh-auto-compile #t)
(set! %load-should-auto-compile #t)
(save-module-excursion
(lambda ()
(set-current-module user-module)
;; Hide the "auto-compiling" messages.
(parameterize ((current-warning-port (%make-void-port "w")))
(call-with-prompt tag
(lambda ()
;; Give 'load' an absolute file name so that it doesn't try to
;; search for FILE in %LOAD-PATH. Note: use 'load', not
;; 'primitive-load', so that FILE is compiled, which then allows us
;; to provide better error reporting with source line numbers.
(load (canonicalize-path file)))
(const #f))))))
(lambda _
;; XXX: Errors are reported from the pre-unwind handler below, but
;; calling 'exit' from there has no effect, so we call it here.
(exit 1))
(rec (handle-error . args)
;; Capture the stack up to this procedure call, excluded, and pass
;; the faulty stack frame to 'report-load-error'.
(let* ((stack (make-stack #t handle-error tag))
(depth (stack-length stack))
(last (and (> depth 0) (stack-ref stack 0)))
(frame (frame-with-source
(if (> depth 1)
(stack-ref stack 1) ;skip the 'throw' frame
last))))
(report-load-error file args frame)
(case on-error
((debug)
(newline)
(display (_ "entering debugger; type ',bt' for a backtrace\n"))
(start-repl #:debug (make-debug (stack->vector stack) 0
(error-string frame args)
#f)))
((backtrace)
(newline (current-error-port))
(display-backtrace stack (current-error-port)))
(else
#t))))))
(define* (report-load-error file args #:optional frame)
"Report the failure to load FILE, a user-provided Scheme file.
ARGS is the list of arguments received by the 'throw' handler."
(match args
(('system-error . _)
(let ((err (system-error-errno args)))
(report-error (_ "failed to load '~a': ~a~%") file (strerror err))))
(('syntax-error proc message properties form . rest)
(let ((loc (source-properties->location properties)))
(format (current-error-port) (_ "~a: error: ~a~%")
(location->string loc) message)))
(('srfi-34 obj)
(report-error (_ "exception thrown: ~s~%") obj))
((error args ...)
(report-error (_ "failed to load '~a':~%") file)
(apply display-error frame (current-error-port) args))))
(define (warn-about-load-error file args) ;FIXME: factorize with ↑
"Report the failure to load FILE, a user-provided Scheme file, without
exiting. ARGS is the list of arguments received by the 'throw' handler."
(match args
(('system-error . _)
(let ((err (system-error-errno args)))
(warning (_ "failed to load '~a': ~a~%") file (strerror err))))
(('syntax-error proc message properties form . rest)
(let ((loc (source-properties->location properties)))
(format (current-error-port) (_ "~a: warning: ~a~%")
(location->string loc) message)))
(('srfi-34 obj)
(warning (_ "failed to load '~a': exception thrown: ~s~%")
file obj))
((error args ...)
(warning (_ "failed to load '~a':~%") file)
(apply display-error #f (current-error-port) args))))
(define (install-locale)
"Install the current locale settings."
(catch 'system-error
(lambda _
(setlocale LC_ALL ""))
(lambda args
(warning (_ "failed to install locale: ~a~%")
(strerror (system-error-errno args))))))
(define (initialize-guix)
"Perform the usual initialization for stand-alone Guix commands."
(install-locale)
(textdomain %gettext-domain)
;; Ignore SIGPIPE. If the daemon closes the connection, we prefer to be
;; notified via an EPIPE later.
(sigaction SIGPIPE SIG_IGN)
(setvbuf (current-output-port) _IOLBF)
(setvbuf (current-error-port) _IOLBF))
(define* (show-version-and-exit #:optional (command (car (command-line))))
"Display version information for COMMAND and `(exit 0)'."
(simple-format #t "~a (~a) ~a~%"
command %guix-package-name %guix-version)
(display (_ "Copyright (C) 2015 the Guix authors
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
"))
(exit 0))
(define (show-bug-report-information)
(format #t (_ "
Report bugs to: ~a.") %guix-bug-report-address)
(format #t (_ "
~a home page: <~a>") %guix-package-name %guix-home-page-url)
(display (_ "
General help using GNU software: <http://www.gnu.org/gethelp/>"))
(newline))
(set! symlink
;; We 'set!' the global binding because (gnu build ...) modules and similar
;; typically don't use (guix ui).
(let ((real-symlink (@ (guile) symlink)))
(lambda (target link)
"This is a 'symlink' replacement that provides proper error reporting."
(catch 'system-error
(lambda ()
(real-symlink target link))
(lambda (key proc fmt args errno)
;; Augment the FMT and ARGS with information about LINK (this
;; information is missing as of Guile 2.0.11, making the exception
;; uninformative.)
(apply throw key proc "~A: ~S"
(list (strerror (car errno)) link)
(list errno)))))))
(set! copy-file
;; Note: here we use 'set!', not #:replace, because UIs typically use
;; 'copy-recursively', which doesn't use (guix ui).
(let ((real-copy-file (@ (guile) copy-file)))
(lambda (source target)
"This is a 'copy-file' replacement that provides proper error reporting."
(catch 'system-error
(lambda ()
(real-copy-file source target))
(lambda (key proc fmt args errno)
;; Augment the FMT and ARGS with information about TARGET (this
;; information is missing as of Guile 2.0.11, making the exception
;; uninformative.)
(apply throw key proc "~A: ~S"
(list (strerror (car errno)) target)
(list errno)))))))
(define (string->number* str)
"Like `string->number', but error out with an error message on failure."
(or (string->number str)
(leave (_ "~a: invalid number~%") str)))
(define (size->number str)
"Convert STR, a storage measurement representation such as \"1024\" or
\"1MiB\", to a number of bytes. Raise an error if STR could not be
interpreted."
(define unit-pos
(string-rindex str char-set:digit))
(define unit
(and unit-pos (substring str (+ 1 unit-pos))))
(let* ((numstr (if unit-pos
(substring str 0 (+ 1 unit-pos))
str))
(num (string->number numstr)))
(unless num
(leave (_ "invalid number: ~a~%") numstr))
((compose inexact->exact round)
(* num
(match unit
((or "KiB" "K" "k") (expt 2 10))
((or "MiB" "M") (expt 2 20))
((or "GiB" "G") (expt 2 30))
((or "TiB" "T") (expt 2 40))
((or "PiB" "P") (expt 2 50))
((or "EiB" "E") (expt 2 60))
((or "ZiB" "Z") (expt 2 70))
((or "YiB" "Y") (expt 2 80))
("kB" (expt 10 3))
("MB" (expt 10 6))
("GB" (expt 10 9))
("TB" (expt 10 12))
("PB" (expt 10 15))
("EB" (expt 10 18))
("ZB" (expt 10 21))
("YB" (expt 10 24))
("" 1)
(_
(leave (_ "unknown unit: ~a~%") unit)))))))
(define (call-with-error-handling thunk)
"Call THUNK within a user-friendly error handler."
(guard (c ((package-input-error? c)
(let* ((package (package-error-package c))
(input (package-error-invalid-input c))
(location (package-location package))
(file (location-file location))
(line (location-line location))
(column (location-column location)))
(leave (_ "~a:~a:~a: package `~a' has an invalid input: ~s~%")
file line column
(package-full-name package) input)))
((package-cross-build-system-error? c)
(let* ((package (package-error-package c))
(loc (package-location package))
(system (package-build-system package)))
(leave (_ "~a: ~a: build system `~a' does not support cross builds~%")
(location->string loc)
(package-full-name package)
(build-system-name system))))
((profile-not-found-error? c)
(leave (_ "profile '~a' does not exist~%")
(profile-error-profile c)))
((missing-generation-error? c)
(leave (_ "generation ~a of profile '~a' does not exist~%")
(missing-generation-error-generation c)
(profile-error-profile c)))
((nar-error? c)
(let ((file (nar-error-file c))
(port (nar-error-port c)))
(if file
(leave (_ "corrupt input while restoring '~a' from ~s~%")
file (or (port-filename port) port))
(leave (_ "corrupt input while restoring archive from ~s~%")
(or (port-filename port) port)))))
((nix-connection-error? c)
(leave (_ "failed to connect to `~a': ~a~%")
(nix-connection-error-file c)
(strerror (nix-connection-error-code c))))
((nix-protocol-error? c)
;; FIXME: Server-provided error messages aren't i18n'd.
(leave (_ "build failed: ~a~%")
(nix-protocol-error-message c)))
((derivation-missing-output-error? c)
(leave (_ "reference to invalid output '~a' of derivation '~a'~%")
(derivation-missing-output c)
(derivation-file-name (derivation-error-derivation c))))
((message-condition? c)
;; Normally '&message' error conditions have an i18n'd message.
(leave (_ "~a~%")
(gettext (condition-message c) %gettext-domain))))
;; Catch EPIPE and the likes.
(catch 'system-error
thunk
(lambda (key proc format-string format-args . rest)
(leave (_ "~a: ~a~%") proc
(apply format #f format-string format-args))))))
(define-syntax-rule (leave-on-EPIPE exp ...)
"Run EXP... in a context when EPIPE errors are caught and lead to 'exit'
with successful exit code. This is useful when writing to the standard output
may lead to EPIPE, because the standard output is piped through 'head' or
similar."
(catch 'system-error
(lambda ()
exp ...)
(lambda args
;; We really have to exit this brutally, otherwise Guile eventually
;; attempts to flush all the ports, leading to an uncaught EPIPE down
;; the path.
(if (= EPIPE (system-error-errno args))
(primitive-_exit 0)
(apply throw args)))))
(define %guix-user-module
;; Module in which user expressions are evaluated.
;; Compute lazily to avoid circularity with (guix gexp).
(delay
(let ((module (make-module)))
(beautify-user-module! module)
;; Use (guix gexp) so that one can use #~ & co.
(module-use! module (resolve-interface '(guix gexp)))
module)))
(define (read/eval str)
"Read and evaluate STR, raising an error if something goes wrong."
(let ((exp (catch #t
(lambda ()
(call-with-input-string str read))
(lambda args
(leave (_ "failed to read expression ~s: ~s~%")
str args)))))
(catch #t
(lambda ()
(eval exp (force %guix-user-module)))
(lambda args
(report-error (_ "failed to evaluate expression '~a':~%") exp)
(match args
(('syntax-error proc message properties form . rest)
(report-error (_ "syntax error: ~a~%") message))
(('srfi-34 obj)
(report-error (_ "exception thrown: ~s~%") obj))
((error args ...)
(apply display-error #f (current-error-port) args))
(what? #f))
(exit 1)))))
(define (read/eval-package-expression str)
"Read and evaluate STR and return the package it refers to, or exit an
error."
(match (read/eval str)
((? package? p) p)
(_
(leave (_ "expression ~s does not evaluate to a package~%")
str))))
(define* (show-what-to-build store drv
#:key dry-run? (use-substitutes? #t))
"Show what will or would (depending on DRY-RUN?) be built in realizing the
derivations listed in DRV. Return #t if there's something to build, #f
otherwise. When USE-SUBSTITUTES?, check and report what is prerequisites are
available for download."
(define substitutable?
;; Call 'substitutation-oracle' upfront so we don't end up launching the
;; substituter many times. This makes a big difference, especially when
;; DRV is a long list as is the case with 'guix environment'.
(if use-substitutes?
(substitution-oracle store drv)
(const #f)))
(define (built-or-substitutable? drv)
(or (null? (derivation-outputs drv))
(let ((out (derivation->output-path drv))) ;XXX: assume "out" exists
(or (valid-path? store out)
(substitutable? out)))))
(let*-values (((build download)
(fold2 (lambda (drv build download)
(let-values (((b d)
(derivation-prerequisites-to-build
store drv
#:substitutable? substitutable?)))
(values (append b build)
(append d download))))
'() '()
drv))
((build) ; add the DRV themselves
(delete-duplicates
(append (map derivation-file-name
(remove built-or-substitutable? drv))
(map derivation-input-path build))))
((download) ; add the references of DOWNLOAD
(if use-substitutes?
(delete-duplicates
(append download
(remove (cut valid-path? store <>)
(append-map
substitutable-references
(substitutable-path-info store
download)))))
download)))
;; TODO: Show the installed size of DOWNLOAD.
(if dry-run?
(begin
(format (current-error-port)
(N_ "~:[The following derivation would be built:~%~{ ~a~%~}~;~]"
"~:[The following derivations would be built:~%~{ ~a~%~}~;~]"
(length build))
(null? build) build)
(format (current-error-port)
(N_ "~:[The following file would be downloaded:~%~{ ~a~%~}~;~]"
"~:[The following files would be downloaded:~%~{ ~a~%~}~;~]"
(length download))
(null? download) download))
(begin
(format (current-error-port)
(N_ "~:[The following derivation will be built:~%~{ ~a~%~}~;~]"
"~:[The following derivations will be built:~%~{ ~a~%~}~;~]"
(length build))
(null? build) build)
(format (current-error-port)
(N_ "~:[The following file will be downloaded:~%~{ ~a~%~}~;~]"
"~:[The following files will be downloaded:~%~{ ~a~%~}~;~]"
(length download))
(null? download) download)))
(pair? build)))
(define show-what-to-build*
(store-lift show-what-to-build))
(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* (show-manifest-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 downgrade)
(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 downgrade
(((($ <manifest-entry> name old-version)
. ($ <manifest-entry> _ new-version output item)) ..1)
(let ((len (length name))
(downgrade (map upgrade-string
name old-version new-version output item)))
(if dry-run?
(format (current-error-port)
(N_ "The following package would be downgraded:~%~{~a~%~}~%"
"The following packages would be downgraded:~%~{~a~%~}~%"
len)
downgrade)
(format (current-error-port)
(N_ "The following package will be downgraded:~%~{~a~%~}~%"
"The following packages will be downgraded:~%~{~a~%~}~%"
len)
downgrade))))
(_ #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))))
(define-syntax with-error-handling
(syntax-rules ()
"Run BODY within a user-friendly error condition handler."
((_ body ...)
(call-with-error-handling
(lambda ()
body ...)))))
(define (location->string loc)
"Return a human-friendly, GNU-standard representation of LOC."
(match loc
(#f (_ "<unknown location>"))
(($ <location> file line column)
(format #f "~a:~a:~a" file line column))))
(define (switch-symlinks link target)
"Atomically switch LINK, a symbolic link, to point to TARGET. Works
both when LINK already exists and when it does not."
(let ((pivot (string-append link ".new")))
(symlink target pivot)
(rename-file pivot link)))
(define (config-directory)
"Return the name of the configuration directory, after making sure that it
exists. Honor the XDG specs,
<http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html>."
(let ((dir (and=> (or (getenv "XDG_CONFIG_HOME")
(and=> (getenv "HOME")
(cut string-append <> "/.config")))
(cut string-append <> "/guix"))))
(catch 'system-error
(lambda ()
(mkdir-p dir)
dir)
(lambda args
(let ((err (system-error-errno args)))
;; ERR is necessarily different from EEXIST.
(leave (_ "failed to create configuration directory `~a': ~a~%")
dir (strerror err)))))))
(define* (fill-paragraph str width #:optional (column 0))
"Fill STR such that each line contains at most WIDTH characters, assuming
that the first character is at COLUMN.
When STR contains a single line break surrounded by other characters, it is
converted to a space; sequences of more than one line break are preserved."
(define (maybe-break chr result)
(match result
((column newlines chars)
(case chr
((#\newline)
`(,column ,(+ 1 newlines) ,chars))
(else
(let* ((spaces (if (and (pair? chars) (eqv? (car chars) #\.)) 2 1))
(chars (case newlines
((0) chars)
((1)
(append (make-list spaces #\space) chars))
(else
(append (make-list newlines #\newline) chars))))
(column (case newlines
((0) column)
((1) (+ spaces column))
(else 0))))
(let ((chars (cons chr chars))
(column (+ 1 column)))
(if (> column width)
(let*-values (((before after)
(break (cut eqv? #\space <>) chars))
((len)
(length before)))
(if (<= len width)
`(,len
0
,(if (null? after)
before
(append before
(cons #\newline
(drop-while (cut eqv? #\space <>)
after)))))
`(,column 0 ,chars))) ; unbreakable
`(,column 0 ,chars)))))))))
(match (string-fold maybe-break
`(,column 0 ())
str)
((_ _ chars)
(list->string (reverse chars)))))
\f
;;;
;;; Packages.
;;;
(define %text-width
(make-parameter (or (and=> (getenv "WIDTH") string->number)
80)))
(set! (@@ (texinfo plain-text) wrap*)
;; XXX: Monkey patch this private procedure to let 'package->recutils'
;; parameterize the fill of description field correctly.
(lambda strings
(let ((indent (fluid-ref (@@ (texinfo plain-text) *indent*))))
(fill-string (string-concatenate strings)
#:line-width (%text-width) #:initial-indent indent
#:subsequent-indent indent))))
(define (texi->plain-text str)
"Return a plain-text representation of texinfo fragment STR."
(stexi->plain-text (texi-fragment->stexi str)))
(define (package-description-string package)
"Return a plain-text representation of PACKAGE description field."
(and=> (package-description package)
(compose texi->plain-text P_)))
(define (string->recutils str)
"Return a version of STR where newlines have been replaced by newlines
followed by \"+ \", which makes for a valid multi-line field value in the
`recutils' syntax."
(list->string
(string-fold-right (lambda (chr result)
(if (eqv? chr #\newline)
(cons* chr #\+ #\space result)
(cons chr result)))
'()
str)))
(define* (package->recutils p port #:optional (width (%text-width)))
"Write to PORT a `recutils' record of package P, arranging to fit within
WIDTH columns."
(define (dependencies->recutils packages)
(let ((list (string-join (map package-full-name
(sort packages package<?)) " ")))
(string->recutils
(fill-paragraph list width
(string-length "dependencies: ")))))
(define (package<? p1 p2)
(string<? (package-full-name p1) (package-full-name p2)))
;; Note: Don't i18n field names so that people can post-process it.
(format port "name: ~a~%" (package-name p))
(format port "version: ~a~%" (package-version p))
(format port "outputs: ~a~%" (string-join (package-outputs p)))
(format port "systems: ~a~%"
(string-join (package-transitive-supported-systems p)))
(format port "dependencies: ~a~%"
(match (package-direct-inputs p)
(((labels inputs . _) ...)
(dependencies->recutils (filter package? inputs)))))
(format port "location: ~a~%"
(or (and=> (package-location p) location->string)
(_ "unknown")))
;; Note: Starting from version 1.6 or recutils, hyphens are not allowed in
;; field identifiers.
(format port "homepage: ~a~%" (package-home-page p))
(format port "license: ~a~%"
(match (package-license p)
(((? license? licenses) ...)
(string-join (map license-name licenses)
", "))
((? license? license)
(license-name license))
(x
(_ "unknown"))))
(format port "synopsis: ~a~%"
(string-map (match-lambda
(#\newline #\space)
(chr chr))
(or (and=> (package-synopsis p) P_)
"")))
(format port "~a~2%"
(string->recutils
(string-trim-right
(parameterize ((%text-width width))
(texi->plain-text
(string-append "description: "
(or (and=> (package-description p) P_)
""))))
#\newline))))
(define (string->generations str)
"Return the list of generations matching a pattern in STR. This function
accepts the following patterns: \"1\", \"1,2,3\", \"1..9\", \"1..\", \"..9\"."
(define (maybe-integer)
(let ((x (string->number str)))
(and (integer? x)
x)))
(define (maybe-comma-separated-integers)
(let ((lst (delete-duplicates
(map string->number
(string-split str #\,)))))
(and (every integer? lst)
lst)))
(cond ((maybe-integer)
=>
list)
((maybe-comma-separated-integers)
=>
identity)
((string-match "^([0-9]+)\\.\\.([0-9]+)$" str)
=>
(lambda (match)
(let ((s (string->number (match:substring match 1)))
(e (string->number (match:substring match 2))))
(and (every integer? (list s e))
(<= s e)
(iota (1+ (- e s)) s)))))
((string-match "^([0-9]+)\\.\\.$" str)
=>
(lambda (match)
(let ((s (string->number (match:substring match 1))))
(and (integer? s)
`(>= ,s)))))
((string-match "^\\.\\.([0-9]+)$" str)
=>
(lambda (match)
(let ((e (string->number (match:substring match 1))))
(and (integer? e)
`(<= ,e)))))
(else #f)))
(define (string->duration str)
"Return the duration matching a pattern in STR. This function accepts the
following patterns: \"1d\", \"1w\", \"1m\"."
(define (hours->duration hours match)
(make-time time-duration 0
(* 3600 hours (string->number (match:substring match 1)))))
(cond ((string-match "^([0-9]+)d$" str)
=>
(lambda (match)
(hours->duration 24 match)))
((string-match "^([0-9]+)w$" str)
=>
(lambda (match)
(hours->duration (* 24 7) match)))
((string-match "^([0-9]+)m$" str)
=>
(lambda (match)
(hours->duration (* 24 30) match)))
(else #f)))
(define* (package-specification->name+version+output spec
#:optional (output "out"))
"Parse package specification SPEC and return three value: the specified
package name, version number (or #f), and output name (or OUTPUT). SPEC may
optionally contain a version number and an output name, as in these examples:
guile
guile-2.0.9
guile:debug
guile-2.0.9:debug
"
(let*-values (((name sub-drv)
(match (string-rindex spec #\:)
(#f (values spec output))
(colon (values (substring spec 0 colon)
(substring spec (+ 1 colon))))))
((name version)
(package-name->name+version name)))
(values name version sub-drv)))
\f
;;;
;;; Command-line option processing.
;;;
(define (args-fold* options unrecognized-option-proc operand-proc . seeds)
"A wrapper on top of `args-fold' that does proper user-facing error
reporting."
(catch 'misc-error
(lambda ()
(apply args-fold options unrecognized-option-proc
operand-proc seeds))
(lambda (key proc msg args . rest)
;; XXX: MSG is not i18n'd.
(leave (_ "invalid argument: ~a~%")
(apply format #f msg args)))))
(define (environment-build-options)
"Return additional build options passed as environment variables."
(arguments-from-environment-variable "GUIX_BUILD_OPTIONS"))
(define %default-argument-handler
;; The default handler for non-option command-line arguments.
(lambda (arg result)
(alist-cons 'argument arg result)))
(define* (parse-command-line args options seeds
#:key
(argument-handler %default-argument-handler))
"Parse the command-line arguments ARGS as well as arguments passed via the
'GUIX_BUILD_OPTIONS' environment variable according to OPTIONS (a list of
SRFI-37 options) and return the result, seeded by SEEDS.
Command-line options take precedence those passed via 'GUIX_BUILD_OPTIONS'.
ARGUMENT-HANDLER is called for non-option arguments, like the 'operand-proc'
parameter of 'args-fold'."
(define (parse-options-from args seeds)
;; Actual parsing takes place here.
(apply args-fold* args options
(lambda (opt name arg . rest)
(leave (_ "~A: unrecognized option~%") name))
argument-handler
seeds))
(call-with-values
(lambda ()
(parse-options-from (environment-build-options) seeds))
(lambda seeds
;; ARGS take precedence over what the environment variable specifies.
(parse-options-from args seeds))))
(define (show-guix-usage)
(format (current-error-port)
(_ "Try `guix --help' for more information.~%"))
(exit 1))
(define (command-files)
"Return the list of source files that define Guix sub-commands."
(define directory
(and=> (search-path %load-path "guix.scm")
(compose (cut string-append <> "/guix/scripts")
dirname)))
(define dot-scm?
(cut string-suffix? ".scm" <>))
(if directory
(scandir directory dot-scm?)
'()))
(define (commands)
"Return the list of Guix command names."
(map (compose (cut string-drop-right <> 4)
basename)
(command-files)))
(define (show-guix-help)
(define (internal? command)
(member command '("substitute" "authenticate" "offload")))
(format #t (_ "Usage: guix COMMAND ARGS...
Run COMMAND with ARGS.\n"))
(newline)
(format #t (_ "COMMAND must be one of the sub-commands listed below:\n"))
(newline)
;; TODO: Display a synopsis of each command.
(format #t "~{ ~a~%~}" (sort (remove internal? (commands))
string<?))
(show-bug-report-information))
(define program-name
;; Name of the command-line program currently executing, or #f.
(make-parameter #f))
(define (run-guix-command command . args)
"Run COMMAND with the given ARGS. Report an error when COMMAND is not
found."
(define module
(catch 'misc-error
(lambda ()
(resolve-interface `(guix scripts ,command)))
(lambda -
(format (current-error-port)
(_ "guix: ~a: command not found~%") command)
(show-guix-usage))))
(let ((command-main (module-ref module
(symbol-append 'guix- command))))
(parameterize ((program-name command))
(apply command-main args))))
(define (run-guix . args)
"Run the 'guix' command defined by command line ARGS.
Unlike 'guix-main', this procedure assumes that locale, i18n support,
and signal handling has already been set up."
(define option? (cut string-prefix? "-" <>))
(match args
(()
(format (current-error-port)
(_ "guix: missing command name~%"))
(show-guix-usage))
((or ("-h") ("--help"))
(show-guix-help))
(("--version")
(show-version-and-exit "guix"))
(((? option? o) args ...)
(format (current-error-port)
(_ "guix: unrecognized option '~a'~%") o)
(show-guix-usage))
(("help" args ...)
(show-guix-help))
((command args ...)
(apply run-guix-command
(string->symbol command)
args))))
(define guix-warning-port
(make-parameter (current-warning-port)))
(define (guix-main arg0 . args)
(initialize-guix)
(apply run-guix args))
;;; ui.scm ends here
|