aboutsummaryrefslogtreecommitdiff
path: root/emacs/guix-main.scm
blob: 335686ed25cd57a991e596c59e994c643cf0b409 (about) (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
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
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016 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/>.

;;; Commentary:

;; Information about packages and generations is passed to the elisp
;; side in the form of alists of parameters (such as ‘name’ or
;; ‘version’) and their values.

;; ‘entries’ procedure is the “entry point” for the elisp side to get
;; information about packages and generations.

;; Since name/version pair is not necessarily unique, we use
;; `object-address' to identify a package (for ‘id’ parameter), if
;; possible.  However for the obsolete packages (that can be found in
;; installed manifest but not in a package directory), ‘id’ parameter is
;; still "name-version" string.  So ‘id’ package parameter in the code
;; below is either an object-address number or a full-name string.

;; To speed-up the process of getting information, the following
;; auxiliary variables are used:
;;
;; - `%packages' - VHash of "package address"/"package" pairs.
;;
;; - `%package-table' - Hash table of
;;   "name+version key"/"list of packages" pairs.

;;; Code:

(use-modules
 (ice-9 vlist)
 (ice-9 match)
 (ice-9 popen)
 (srfi srfi-1)
 (srfi srfi-2)
 (srfi srfi-11)
 (srfi srfi-19)
 (srfi srfi-26)
 (guix)
 (guix git-download)
 (guix packages)
 (guix profiles)
 (guix licenses)
 (guix utils)
 (guix ui)
 (guix scripts lint)
 (guix scripts package)
 (guix scripts pull)
 (gnu packages)
 (gnu system))

(define-syntax-rule (first-or-false lst)
  (and (not (null? lst))
       (first lst)))

(define (list-maybe obj)
  (if (list? obj) obj (list obj)))

(define (output+error thunk)
  "Call THUNK and return 2 values: output and error output as strings."
  (let ((output-port (open-output-string))
        (error-port  (open-output-string)))
    (with-output-to-port output-port
      (lambda () (with-error-to-port error-port thunk)))
    (let ((strings (list (get-output-string output-port)
                         (get-output-string error-port))))
      (close-output-port output-port)
      (close-output-port error-port)
      (apply values strings))))

(define (full-name->name+version spec)
  "Given package specification SPEC with or without output,
return two values: name and version.  For example, for SPEC
\"foo-0.9.1b:lib\", return \"foo\" and \"0.9.1b\"."
  (let-values (((name version output)
                (package-specification->name+version+output spec)))
    (values name version)))

(define (name+version->full-name name version)
  (string-append name "-" version))

(define* (make-package-specification name #:optional version output)
  (let ((full-name (if version
                       (name+version->full-name name version)
                       name)))
    (if output
        (string-append full-name ":" output)
        full-name)))

(define name+version->key cons)
(define key->name+version car+cdr)

(define %packages
  (fold-packages (lambda (pkg res)
                   (vhash-consq (object-address pkg) pkg res))
                 vlist-null))

(define %package-table
  (let ((table (make-hash-table (vlist-length %packages))))
    (vlist-for-each
     (lambda (elem)
       (match elem
         ((address . pkg)
          (let* ((key (name+version->key (package-name pkg)
                                         (package-version pkg)))
                 (ref (hash-ref table key)))
            (hash-set! table key
                       (if ref (cons pkg ref) (list pkg)))))))
     %packages)
    table))

(define (manifest-entry->name+version+output entry)
  (values
   (manifest-entry-name    entry)
   (manifest-entry-version entry)
   (manifest-entry-output  entry)))

(define (manifest-entry->package-specification entry)
  (call-with-values
      (lambda () (manifest-entry->name+version+output entry))
    make-package-specification))

(define (manifest-entries->package-specifications entries)
  (map manifest-entry->package-specification entries))

(define (profile-package-specifications profile)
  "Return a list of package specifications for PROFILE."
  (let ((manifest (profile-manifest profile)))
    (manifest-entries->package-specifications
     (manifest-entries manifest))))

(define (profile->specifications+paths profile)
  "Return a list of package specifications and paths for PROFILE.
Each element of the list is a list of the package specification and its path."
  (let ((manifest (profile-manifest profile)))
    (map (lambda (entry)
           (list (manifest-entry->package-specification entry)
                 (manifest-entry-item entry)))
         (manifest-entries manifest))))

(define (profile-difference profile1 profile2)
  "Return a list of package specifications for outputs installed in PROFILE1
and not installed in PROFILE2."
  (let ((specs1 (profile-package-specifications profile1))
        (specs2 (profile-package-specifications profile2)))
    (lset-difference string=? specs1 specs2)))

(define (manifest-entries->hash-table entries)
  "Return a hash table of name keys and lists of matching manifest ENTRIES."
  (let ((table (make-hash-table (length entries))))
    (for-each (lambda (entry)
                (let* ((key (manifest-entry-name entry))
                       (ref (hash-ref table key)))
                  (hash-set! table key
                             (if ref (cons entry ref) (list entry)))))
              entries)
    table))

(define (manifest=? m1 m2)
  (or (eq? m1 m2)
      (equal? m1 m2)))

(define manifest->hash-table
  (let ((current-manifest #f)
        (current-table #f))
    (lambda (manifest)
      "Return a hash table of name keys and matching MANIFEST entries."
      (unless (manifest=? manifest current-manifest)
        (set! current-manifest manifest)
        (set! current-table (manifest-entries->hash-table
                             (manifest-entries manifest))))
      current-table)))

(define* (manifest-entries-by-name manifest name #:optional version output)
  "Return a list of MANIFEST entries matching NAME, VERSION and OUTPUT."
  (let ((entries (or (hash-ref (manifest->hash-table manifest) name)
                     '())))
    (if (or version output)
        (filter (lambda (entry)
                  (and (or (not version)
                           (equal? version (manifest-entry-version entry)))
                       (or (not output)
                           (equal? output  (manifest-entry-output entry)))))
                entries)
        entries)))

(define (manifest-entry-by-output entries output)
  "Return a manifest entry from ENTRIES matching OUTPUT."
  (find (lambda (entry)
          (string= output (manifest-entry-output entry)))
        entries))

(define (fold-manifest-by-name manifest proc init)
  "Fold over MANIFEST entries.
Call (PROC NAME VERSION ENTRIES RESULT), using INIT as the initial value
of RESULT.  ENTRIES is a list of manifest entries with NAME/VERSION."
  (hash-fold (lambda (name entries res)
               (proc name (manifest-entry-version (car entries))
                     entries res))
             init
             (manifest->hash-table manifest)))

(define* (object-transformer param-alist #:optional (params '()))
  "Return procedure transforming objects into alist of parameter/value pairs.

PARAM-ALIST is alist of available parameters (symbols) and procedures
returning values of these parameters.  Each procedure is applied to
objects.

PARAMS is list of parameters from PARAM-ALIST that should be returned by
a resulting procedure.  If PARAMS is not specified or is an empty list,
use all available parameters.

Example:

  (let* ((alist `((plus1 . ,1+) (minus1 . ,1-) (mul2 . ,(cut * 2 <>))))
         (number->alist (object-transformer alist '(plus1 mul2))))
    (number->alist 8))
  =>
  ((plus1 . 9) (mul2 . 16))
"
  (let* ((use-all-params (null? params))
         (alist (filter-map (match-lambda
                             ((param . proc)
                              (and (or use-all-params
                                       (memq param params))
                                   (cons param proc)))
                             (_ #f))
                            param-alist)))
    (lambda objects
      (map (match-lambda
            ((param . proc)
             (cons param (apply proc objects))))
           alist))))

(define %manifest-entry-param-alist
  `((output       . ,manifest-entry-output)
    (path         . ,manifest-entry-item)
    (dependencies . ,manifest-entry-dependencies)))

(define manifest-entry->sexp
  (object-transformer %manifest-entry-param-alist))

(define (manifest-entries->sexps entries)
  (map manifest-entry->sexp entries))

(define (package-inputs-names inputs)
  "Return a list of full names of the packages from package INPUTS."
  (filter-map (match-lambda
               ((_ (? package? package))
                (package-full-name package))
               ((_ (? package? package) output)
                (make-package-specification (package-name package)
                                            (package-version package)
                                            output))
               (_ #f))
              inputs))

(define (package-license-names package)
  "Return a list of license names of the PACKAGE."
  (filter-map (lambda (license)
                (and (license? license)
                     (license-name license)))
              (list-maybe (package-license package))))

(define (package-source-names package)
  "Return a list of source names (URLs) of the PACKAGE."
  (let ((source (package-source package)))
    (and (origin? source)
         (filter-map (lambda (uri)
                       (cond ((string? uri)
                              uri)
                             ((git-reference? uri)
                              (git-reference-url uri))
                             (else "Unknown source type")))
                     (list-maybe (origin-uri source))))))

(define (package-unique? package)
  "Return #t if PACKAGE is a single package with such name/version."
  (null? (cdr (packages-by-name (package-name package)
                                (package-version package)))))

(define %package-param-alist
  `((id                . ,object-address)
    (package-id        . ,object-address)
    (name              . ,package-name)
    (version           . ,package-version)
    (license           . ,package-license-names)
    (source            . ,package-source-names)
    (synopsis          . ,package-synopsis)
    (description       . ,package-description-string)
    (home-url          . ,package-home-page)
    (outputs           . ,package-outputs)
    (systems           . ,package-supported-systems)
    (non-unique        . ,(negate package-unique?))
    (inputs            . ,(lambda (pkg)
                            (package-inputs-names
                             (package-inputs pkg))))
    (native-inputs     . ,(lambda (pkg)
                            (package-inputs-names
                             (package-native-inputs pkg))))
    (propagated-inputs . ,(lambda (pkg)
                            (package-inputs-names
                             (package-propagated-inputs pkg))))
    (location          . ,(lambda (pkg)
                            (location->string (package-location pkg))))))

(define (package-param package param)
  "Return a value of a PACKAGE PARAM."
  (and=> (assq-ref %package-param-alist param)
         (cut <> package)))


;;; Finding packages.

(define (package-by-address address)
  (and=> (vhash-assq address %packages)
         cdr))

(define (packages-by-name+version name version)
  (or (hash-ref %package-table
                (name+version->key name version))
      '()))

(define (packages-by-full-name full-name)
  (call-with-values
      (lambda () (full-name->name+version full-name))
    packages-by-name+version))

(define (packages-by-id id)
  (if (integer? id)
      (let ((pkg (package-by-address id)))
        (if pkg (list pkg) '()))
      (packages-by-full-name id)))

(define (id->name+version id)
  (if (integer? id)
      (and=> (package-by-address id)
             (lambda (pkg)
               (values (package-name pkg)
                       (package-version pkg))))
      (full-name->name+version id)))

(define (package-by-id id)
  (first-or-false (packages-by-id id)))

(define (newest-package-by-id id)
  (and=> (id->name+version id)
         (lambda (name)
           (first-or-false (find-best-packages-by-name name #f)))))

(define (matching-packages predicate)
  (fold-packages (lambda (pkg res)
                   (if (predicate pkg)
                       (cons pkg res)
                       res))
                 '()))

(define (filter-packages-by-output packages output)
  (filter (lambda (package)
            (member output (package-outputs package)))
          packages))

(define* (packages-by-name name #:optional version output)
  "Return a list of packages matching NAME, VERSION and OUTPUT."
  (let ((packages (if version
                      (packages-by-name+version name version)
                      (matching-packages
                       (lambda (pkg) (string=? name (package-name pkg)))))))
    (if output
        (filter-packages-by-output packages output)
        packages)))

(define (manifest-entry->packages entry)
  (call-with-values
      (lambda () (manifest-entry->name+version+output entry))
    packages-by-name))

(define (packages-by-regexp regexp match-params)
  "Return a list of packages matching REGEXP string.
MATCH-PARAMS is a list of parameters that REGEXP can match."
  (define (package-match? package regexp)
    (any (lambda (param)
           (let ((val (package-param package param)))
             (and (string? val) (regexp-exec regexp val))))
         match-params))

  (let ((re (make-regexp regexp regexp/icase)))
    (matching-packages (cut package-match? <> re))))

(define (packages-by-license license)
  "Return a list of packages with LICENSE."
  (matching-packages
   (lambda (package)
     (memq license (list-maybe (package-license package))))))

(define (all-available-packages)
  "Return a list of all available packages."
  (matching-packages (const #t)))

(define (newest-available-packages)
  "Return a list of the newest available packages."
  (vhash-fold (lambda (name elem res)
                (match elem
                  ((_ newest pkgs ...)
                   (cons newest res))))
              '()
              (find-newest-available-packages)))


;;; Making package/output patterns.

(define (specification->package-pattern specification)
  (call-with-values
      (lambda ()
        (full-name->name+version specification))
    list))

(define (specification->output-pattern specification)
  (call-with-values
      (lambda ()
        (package-specification->name+version+output specification #f))
    list))

(define (id->package-pattern id)
  (if (integer? id)
      (package-by-address id)
      (specification->package-pattern id)))

(define (id->output-pattern id)
  "Return an output pattern by output ID.
ID should be '<package-address>:<output>' or '<name>-<version>:<output>'."
  (let-values (((name version output)
                (package-specification->name+version+output id)))
    (if version
        (list name version output)
        (list (package-by-address (string->number name))
              output))))

(define (specifications->package-patterns . specifications)
  (map specification->package-pattern specifications))

(define (specifications->output-patterns . specifications)
  (map specification->output-pattern specifications))

(define (ids->package-patterns . ids)
  (map id->package-pattern ids))

(define (ids->output-patterns . ids)
  (map id->output-pattern ids))

(define* (manifest-patterns-result packages res obsolete-pattern
                                   #:optional installed-pattern)
  "Auxiliary procedure for 'manifest-package-patterns' and
'manifest-output-patterns'."
  (if (null? packages)
      (cons (obsolete-pattern) res)
      (if installed-pattern
          ;; We don't need duplicates for a list of installed packages,
          ;; so just take any (car) package.
          (cons (installed-pattern (car packages)) res)
          res)))

(define* (manifest-package-patterns manifest #:optional obsolete-only?)
  "Return a list of package patterns for MANIFEST entries.
If OBSOLETE-ONLY? is #f, use all entries, otherwise make patterns only
for obsolete packages."
  (fold-manifest-by-name
   manifest
   (lambda (name version entries res)
     (manifest-patterns-result (packages-by-name name version)
                               res
                               (lambda () (list name version entries))
                               (and (not obsolete-only?)
                                    (cut list <> entries))))
   '()))

(define* (manifest-output-patterns manifest #:optional obsolete-only?)
  "Return a list of output patterns for MANIFEST entries.
If OBSOLETE-ONLY? is #f, use all entries, otherwise make patterns only
for obsolete packages."
  (fold (lambda (entry res)
          (manifest-patterns-result (manifest-entry->packages entry)
                                    res
                                    (lambda () entry)
                                    (and (not obsolete-only?)
                                         (cut list <> entry))))
        '()
        (manifest-entries manifest)))

(define (obsolete-package-patterns manifest)
  (manifest-package-patterns manifest #t))

(define (obsolete-output-patterns manifest)
  (manifest-output-patterns manifest #t))


;;; Transforming package/output patterns into alists.

(define (obsolete-package-sexp name version entries)
  "Return an alist with information about obsolete package.
ENTRIES is a list of installed manifest entries."
  `((id        . ,(name+version->full-name name version))
    (name      . ,name)
    (version   . ,version)
    (outputs   . ,(map manifest-entry-output entries))
    (obsolete  . #t)
    (installed . ,(manifest-entries->sexps entries))))

(define (package-pattern-transformer manifest params)
  "Return 'package-pattern->package-sexps' procedure."
  (define package->sexp
    (object-transformer %package-param-alist params))

  (define* (sexp-by-package package #:optional
                            (entries (manifest-entries-by-name
                                      manifest
                                      (package-name package)
                                      (package-version package))))
    (cons (cons 'installed (manifest-entries->sexps entries))
          (package->sexp package)))

  (define (->sexps pattern)
    (match pattern
      ((? package? package)
       (list (sexp-by-package package)))
      (((? package? package) entries)
       (list (sexp-by-package package entries)))
      ((name version entries)
       (list (obsolete-package-sexp
              name version entries)))
      ((name version)
       (let ((packages (packages-by-name name version)))
         (if (null? packages)
             (let ((entries (manifest-entries-by-name
                             manifest name version)))
               (if (null? entries)
                   '()
                   (list (obsolete-package-sexp
                          name version entries))))
             (map sexp-by-package packages))))
      (_ '())))

  ->sexps)

(define (output-pattern-transformer manifest params)
  "Return 'output-pattern->output-sexps' procedure."
  (define package->sexp
    (object-transformer (alist-delete 'id %package-param-alist)
                        params))

  (define manifest-entry->sexp
    (object-transformer (alist-delete 'output %manifest-entry-param-alist)
                        params))

  (define* (output-sexp pkg-alist pkg-address output
                        #:optional entry)
    (let ((entry-alist (if entry
                           (manifest-entry->sexp entry)
                           '()))
          (base `((id        . ,(string-append
                                 (number->string pkg-address)
                                 ":" output))
                  (output    . ,output)
                  (installed . ,(->bool entry)))))
      (append entry-alist base pkg-alist)))

  (define (obsolete-output-sexp entry)
    (let-values (((name version output)
                  (manifest-entry->name+version+output entry)))
      (let ((base `((id         . ,(make-package-specification
                                    name version output))
                    (package-id . ,(name+version->full-name name version))
                    (name       . ,name)
                    (version    . ,version)
                    (output     . ,output)
                    (obsolete   . #t)
                    (installed  . #t))))
        (append (manifest-entry->sexp entry) base))))

  (define* (sexps-by-package package #:optional output
                             (entries (manifest-entries-by-name
                                       manifest
                                       (package-name package)
                                       (package-version package))))
    ;; Assuming that PACKAGE has this OUTPUT.
    (let ((pkg-alist (package->sexp package))
          (address (object-address package))
          (outputs (if output
                       (list output)
                       (package-outputs package))))
      (map (lambda (output)
             (output-sexp pkg-alist address output
                          (manifest-entry-by-output entries output)))
           outputs)))

  (define* (sexps-by-manifest-entry entry #:optional
                                    (packages (manifest-entry->packages
                                               entry)))
    (if (null? packages)
        (list (obsolete-output-sexp entry))
        (map (lambda (package)
               (output-sexp (package->sexp package)
                            (object-address package)
                            (manifest-entry-output entry)
                            entry))
             packages)))

  (define (->sexps pattern)
    (match pattern
      ((? package? package)
       (sexps-by-package package))
      ((package (? string? output))
       (sexps-by-package package output))
      ((? manifest-entry? entry)
       (list (obsolete-output-sexp entry)))
      ((package entry)
       (sexps-by-manifest-entry entry (list package)))
      ((name version output)
       (let ((packages (packages-by-name name version output)))
         (if (null? packages)
             (let ((entries (manifest-entries-by-name
                             manifest name version output)))
               (append-map (cut sexps-by-manifest-entry <>)
                           entries))
             (append-map (cut sexps-by-package <> output)
                         packages))))
      (_ '())))

  ->sexps)

(define (entry-type-error entry-type)
  (error (format #f "Wrong entry-type '~a'" entry-type)))

(define (search-type-error entry-type search-type)
  (error (format #f "Wrong search type '~a' for entry-type '~a'"
                 search-type entry-type)))

(define %pattern-transformers
  `((package . ,package-pattern-transformer)
    (output  . ,output-pattern-transformer)))

(define (pattern-transformer entry-type)
  (assq-ref %pattern-transformers entry-type))

;; All procedures from inner alists are called with (MANIFEST . SEARCH-VALS)
;; as arguments; see `package/output-sexps'.
(define %patterns-makers
  (let* ((apply-to-rest         (lambda (proc)
                                  (lambda (_ . rest) (apply proc rest))))
         (apply-to-first        (lambda (proc)
                                  (lambda (first . _) (proc first))))
         (manifest-package-proc (apply-to-first manifest-package-patterns))
         (manifest-output-proc  (apply-to-first manifest-output-patterns))
         (regexp-proc           (lambda (_ regexp params . __)
                                  (packages-by-regexp regexp params)))
         (license-proc          (lambda (_ license-name)
                                  (packages-by-license
                                   (lookup-license license-name))))
         (all-proc              (lambda _ (all-available-packages)))
         (newest-proc           (lambda _ (newest-available-packages))))
    `((package
       (id               . ,(apply-to-rest ids->package-patterns))
       (name             . ,(apply-to-rest specifications->package-patterns))
       (installed        . ,manifest-package-proc)
       (obsolete         . ,(apply-to-first obsolete-package-patterns))
       (regexp           . ,regexp-proc)
       (license          . ,license-proc)
       (all-available    . ,all-proc)
       (newest-available . ,newest-proc))
      (output
       (id               . ,(apply-to-rest ids->output-patterns))
       (name             . ,(apply-to-rest specifications->output-patterns))
       (installed        . ,manifest-output-proc)
       (obsolete         . ,(apply-to-first obsolete-output-patterns))
       (regexp           . ,regexp-proc)
       (license          . ,license-proc)
       (all-available    . ,all-proc)
       (newest-available . ,newest-proc)))))

(define (patterns-maker entry-type search-type)
  (or (and=> (assq-ref %patterns-makers entry-type)
             (cut assq-ref <> search-type))
      (search-type-error entry-type search-type)))

(define (package/output-sexps profile params entry-type
                              search-type search-vals)
  "Return information about packages or package outputs.
See 'entry-sexps' for details."
  (let* ((manifest (profile-manifest profile))
         (patterns (if (and (eq? entry-type 'output)
                            (eq? search-type 'profile-diff))
                       (match search-vals
                         ((p1 p2)
                          (map specification->output-pattern
                               (profile-difference p1 p2)))
                         (_ '()))
                       (apply (patterns-maker entry-type search-type)
                              manifest search-vals)))
         (->sexps ((pattern-transformer entry-type) manifest params)))
    (append-map ->sexps patterns)))


;;; Getting information about generations.

(define (generation-param-alist profile)
  "Return an alist of generation parameters and procedures for PROFILE."
  (let ((current (generation-number profile)))
    `((id          . ,identity)
      (number      . ,identity)
      (prev-number . ,(cut previous-generation-number profile <>))
      (current     . ,(cut = current <>))
      (path        . ,(cut generation-file-name profile <>))
      (time        . ,(lambda (gen)
                        (time-second (generation-time profile gen)))))))

(define (matching-generations profile predicate)
  "Return a list of PROFILE generations matching PREDICATE."
  (filter predicate (profile-generations profile)))

(define (last-generations profile number)
  "Return a list of last NUMBER generations.
If NUMBER is 0 or less, return all generations."
  (let ((generations (profile-generations profile))
        (number (if (<= number 0) +inf.0 number)))
    (if (> (length generations) number)
        (list-head  (reverse generations) number)
        generations)))

(define (find-generations profile search-type search-vals)
  "Find PROFILE's generations matching SEARCH-TYPE and SEARCH-VALS."
  (case search-type
    ((id)
     (matching-generations profile (cut memq <> search-vals)))
    ((last)
     (last-generations profile (car search-vals)))
    ((all)
     (last-generations profile +inf.0))
    ((time)
     (match search-vals
       ((from to)
        (matching-generations
         profile
         (lambda (gen)
           (let ((time (time-second (generation-time profile gen))))
             (< from time to)))))
       (_ '())))
    (else (search-type-error "generation" search-type))))

(define (generation-sexps profile params search-type search-vals)
  "Return information about generations.
See 'entry-sexps' for details."
  (let ((generations (find-generations profile search-type search-vals))
        (->sexp (object-transformer (generation-param-alist profile)
                                    params)))
    (map ->sexp generations)))

(define system-generation-boot-parameters
  (memoize
   (lambda (profile generation)
     "Return boot parameters for PROFILE's system GENERATION."
     (let* ((gen-file   (generation-file-name profile generation))
            (param-file (string-append gen-file "/parameters")))
       (call-with-input-file param-file read-boot-parameters)))))

(define (system-generation-param-alist profile)
  "Return an alist of system generation parameters and procedures for
PROFILE."
  (append (generation-param-alist profile)
          `((label       . ,(lambda (gen)
                              (boot-parameters-label
                               (system-generation-boot-parameters
                                profile gen))))
            (root-device . ,(lambda (gen)
                              (boot-parameters-root-device
                               (system-generation-boot-parameters
                                profile gen))))
            (kernel      . ,(lambda (gen)
                              (boot-parameters-kernel
                               (system-generation-boot-parameters
                                profile gen)))))))

(define (system-generation-sexps profile params search-type search-vals)
  "Return an alist with information about system generations."
  (let ((generations (find-generations profile search-type search-vals))
        (->sexp (object-transformer (system-generation-param-alist profile)
                                    params)))
    (map ->sexp generations)))


;;; Getting package/output/generation entries (alists).

(define (entries profile params entry-type search-type search-vals)
  "Return information about entries.

ENTRY-TYPE is a symbol defining a type of returning information.  Should
be: 'package', 'output' or 'generation'.

SEARCH-TYPE and SEARCH-VALS define how to get the information.
SEARCH-TYPE should be one of the following symbols:

- If ENTRY-TYPE is 'package' or 'output':
  'id', 'name', 'regexp', 'all-available', 'newest-available',
  'installed', 'obsolete', 'generation'.

- If ENTRY-TYPE is 'generation':
  'id', 'last', 'all', 'time'.

PARAMS is a list of parameters for receiving.  If it is an empty list,
get information with all available parameters, which are:

- If ENTRY-TYPE is 'package':
  'id', 'name', 'version', 'outputs', 'license', 'synopsis',
  'description', 'home-url', 'inputs', 'native-inputs',
  'propagated-inputs', 'location', 'installed'.

- If ENTRY-TYPE is 'output':
  'id', 'package-id', 'name', 'version', 'output', 'license',
  'synopsis', 'description', 'home-url', 'inputs', 'native-inputs',
  'propagated-inputs', 'location', 'installed', 'path', 'dependencies'.

- If ENTRY-TYPE is 'generation':
  'id', 'number', 'prev-number', 'path', 'time'.

Returning value is a list of alists.  Each alist consists of
parameter/value pairs."
  (case entry-type
    ((package output)
     (package/output-sexps profile params entry-type
                           search-type search-vals))
    ((generation)
     (generation-sexps profile params
                       search-type search-vals))
    ((system-generation)
     (system-generation-sexps profile params
                              search-type search-vals))
    (else (entry-type-error entry-type))))


;;; Package actions.

(define* (package->manifest-entry* package #:optional output)
  (and package
       (begin
         (check-package-freshness package)
         (package->manifest-entry package output))))

(define* (make-install-manifest-entries id #:optional output)
  (package->manifest-entry* (package-by-id id) output))

(define* (make-upgrade-manifest-entries id #:optional output)
  (package->manifest-entry* (newest-package-by-id id) output))

(define* (make-manifest-pattern id #:optional output)
  "Make manifest pattern from a package ID and OUTPUT."
  (let-values (((name version)
                (id->name+version id)))
    (and name version
         (manifest-pattern
          (name name)
          (version version)
          (output output)))))

(define (convert-action-pattern pattern proc)
  "Convert action PATTERN into a list of objects returned by PROC.
PROC is called: (PROC ID) or (PROC ID OUTPUT)."
  (match pattern
    ((id . outputs)
     (if (null? outputs)
         (let ((obj (proc id)))
           (if obj (list obj) '()))
         (filter-map (cut proc id <>)
                     outputs)))
    (_ '())))

(define (convert-action-patterns patterns proc)
  (append-map (cut convert-action-pattern <> proc)
              patterns))

(define* (process-package-actions
          profile #:key (install '()) (upgrade '()) (remove '())
          (use-substitutes? #t) dry-run?)
  "Perform package actions.

INSTALL, UPGRADE, REMOVE are lists of 'package action patterns'.
Each pattern should have the following form:

  (ID . OUTPUTS)

ID is an object address or a full-name of a package.
OUTPUTS is a list of package outputs (may be an empty list)."
  (format #t "The process begins ...~%")
  (let* ((install (append
                   (convert-action-patterns
                    install make-install-manifest-entries)
                   (convert-action-patterns
                    upgrade make-upgrade-manifest-entries)))
         (remove (convert-action-patterns remove make-manifest-pattern))
         (transaction (manifest-transaction (install install)
                                            (remove remove)))
         (manifest (profile-manifest profile))
         (new-manifest (manifest-perform-transaction
                        manifest transaction)))
    (unless (and (null? install) (null? remove))
      (with-store store
        (let* ((derivation (run-with-store store
                             (mbegin %store-monad
                               (set-guile-for-build (default-guile))
                               (profile-derivation new-manifest))))
               (derivations (list derivation))
               (new-profile (derivation->output-path derivation)))
          (set-build-options store
                             #:print-build-trace #f
                             #:use-substitutes? use-substitutes?)
          (show-manifest-transaction store manifest transaction
                                     #:dry-run? dry-run?)
          (show-what-to-build store derivations
                              #:use-substitutes? use-substitutes?
                              #:dry-run? dry-run?)
          (unless dry-run?
            (let ((name (generation-file-name
                         profile
                         (+ 1 (generation-number profile)))))
              (and (build-derivations store derivations)
                   (let* ((entries (manifest-entries new-manifest))
                          (count   (length entries)))
                     (switch-symlinks name new-profile)
                     (switch-symlinks profile name)
                     (format #t (N_ "~a package in profile~%"
                                    "~a packages in profile~%"
                                    count)
                             count)
                     (display-search-paths entries (list profile)))))))))))

(define (delete-generations* profile generations)
  "Delete GENERATIONS from PROFILE.
GENERATIONS is a list of generation numbers."
  (with-store store
    (delete-generations store profile generations)))

(define (package-location-string id-or-name)
  "Return a location string of a package with ID-OR-NAME."
  (and-let* ((package  (or (package-by-id id-or-name)
                           (first (packages-by-name id-or-name))))
             (location (package-location package)))
    (location->string location)))

(define (package-source-derivation->store-path derivation)
  "Return a store path of the package source DERIVATION."
  (match (derivation-outputs derivation)
    ;; Source derivation is always (("out" . derivation)).
    (((_ . output-drv))
     (derivation-output-path output-drv))
    (_ #f)))

(define (package-source-path package-id)
  "Return a store file path to a source of a package PACKAGE-ID."
  (and-let* ((package (package-by-id package-id))
             (source  (package-source package)))
    (with-store store
      (package-source-derivation->store-path
       (package-source-derivation store source)))))

(define* (package-source-build-derivation package-id #:key dry-run?
                                          (use-substitutes? #t))
  "Build source derivation of a package PACKAGE-ID."
  (and-let* ((package (package-by-id package-id))
             (source  (package-source package)))
    (with-store store
      (let* ((derivation  (package-source-derivation store source))
             (derivations (list derivation)))
        (set-build-options store
                           #:print-build-trace #f
                           #:use-substitutes? use-substitutes?)
        (show-what-to-build store derivations
                            #:use-substitutes? use-substitutes?
                            #:dry-run? dry-run?)
        (unless dry-run?
          (build-derivations store derivations))
        (format #t "The source store path: ~a~%"
                (package-source-derivation->store-path derivation))))))


;;; Executing guix commands

(define (guix-command . args)
  "Run 'guix ARGS ...' command."
  (catch 'quit
    (lambda () (apply run-guix args))
    (const #t)))

(define (guix-command-output . args)
  "Return 2 strings with 'guix ARGS ...' output and error output."
  (output+error
   (lambda ()
     (parameterize ((guix-warning-port (current-error-port)))
       (apply guix-command args)))))

(define (help-string . commands)
  "Return string with 'guix COMMANDS ... --help' output."
  (apply guix-command-output `(,@commands "--help")))

(define (pipe-guix-output guix-args command-args)
  "Run 'guix GUIX-ARGS ...' command and pipe its output to a shell command
defined by COMMAND-ARGS.
Return #t if the shell command was executed successfully."
  (let ((pipe (apply open-pipe* OPEN_WRITE command-args)))
    (with-output-to-port pipe
      (lambda () (apply guix-command guix-args)))
    (zero? (status:exit-val (close-pipe pipe)))))


;;; Lists of packages, lint checkers, etc.

(define (graph-type-names)
  "Return a list of names of available graph node types."
  (map (@ (guix graph) node-type-name)
       (@ (guix scripts graph) %node-types)))

(define (refresh-updater-names)
  "Return a list of names of available refresh updater types."
  (map (@ (guix upstream) upstream-updater-name)
       (@ (guix scripts refresh) %updaters)))

(define (lint-checker-names)
  "Return a list of names of available lint checkers."
  (map (lambda (checker)
         (symbol->string (lint-checker-name checker)))
       %checkers))

(define (package-names)
  "Return a list of names of available packages."
  (delete-duplicates
   (fold-packages (lambda (pkg res)
                    (cons (package-name pkg) res))
                  '())))

;; See the comment to 'guix-package-names' function in "guix-popup.el".
(define (package-names-lists)
  (map list (package-names)))


;;; Licenses

(define %licenses
  (delay
    (filter license?
            (module-map (lambda (_ var)
                          (variable-ref var))
                        (resolve-interface '(guix licenses))))))

(define (licenses)
  (force %licenses))

(define (license-names)
  "Return a list of names of available licenses."
  (map license-name (licenses)))

(define lookup-license
  (memoize
   (lambda (name)
     "Return a license by its name."
     (find (lambda (l)
             (string=? name (license-name l)))
           (licenses)))))

(define (lookup-license-uri name)
  "Return a license URI by its name."
  (and=> (lookup-license name)
         license-uri))

(define %license-param-alist
  `((id      . ,license-name)
    (name    . ,license-name)
    (url     . ,license-uri)
    (comment . ,license-comment)))

(define license->sexp
  (object-transformer %license-param-alist))

(define (find-licenses search-type . search-values)
  "Return a list of licenses depending on SEARCH-TYPE and SEARCH-VALUES."
  (case search-type
    ((id name)
     (let ((names search-values))
       (filter-map lookup-license names)))
    ((all)
     (licenses))))

(define (license-entries search-type . search-values)
  (map license->sexp
       (apply find-licenses search-type search-values)))