summaryrefslogtreecommitdiff
path: root/gnu/services/xorg.scm
blob: f8cf9f25b67dd3fc2aa02bd6a15019df6d427d38 (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
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Andy Wingo <wingo@igalia.com>
;;; Copyright © 2013-2017, 2019-2020, 2022 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
;;; Copyright © 2018, 2019 Timothy Sample <samplet@ngyro.com>
;;; Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2019 Tim Gesthuizen <tim.gesthuizen@yahoo.de>
;;; Copyright © 2020 shtwzrd <shtwzrd@protonmail.com>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;; Copyright © 2020 Alex Griffin <a@ajgrf.com>
;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
;;; Copyright © 2021 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2021 Josselin Poiret <josselin.poiret@protonmail.ch>
;;; Copyright © 2022 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2023 muradm <mail@muradm.net>
;;;
;;; 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 (gnu services xorg)
  #:autoload   (gnu services sddm) (sddm-service-type)
  #:use-module (gnu artwork)
  #:use-module (gnu services)
  #:use-module (gnu services configuration)
  #:use-module (gnu services shepherd)
  #:use-module (gnu system pam)
  #:use-module (gnu system setuid)
  #:use-module (gnu system keyboard)
  #:use-module (gnu services base)
  #:use-module (gnu services dbus)
  #:use-module (gnu packages base)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages xorg)
  #:use-module (gnu packages fonts)
  #:use-module (gnu packages gl)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages display-managers)
  #:use-module (gnu packages freedesktop)
  #:use-module (gnu packages gnustep)
  #:use-module (gnu packages gnome)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages bash)
  #:use-module (gnu system shadow)
  #:use-module (guix build-system glib-or-gtk)
  #:use-module (guix build-system trivial)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix records)
  #:use-module (guix deprecation)
  #:use-module (guix utils)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-9)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 format)
  #:use-module (ice-9 match)
  #:export (xorg-configuration
            xorg-configuration?
            xorg-configuration-modules
            xorg-configuration-fonts
            xorg-configuration-drivers
            xorg-configuration-resolutions
            xorg-configuration-extra-config
            xorg-configuration-server
            xorg-configuration-server-arguments

            %default-xorg-modules
            %default-xorg-fonts
            %default-xorg-server-arguments

            xorg-wrapper
            xorg-start-command
            xinitrc
            xorg-server-service-type

            %default-slim-theme
            %default-slim-theme-name

            slim-configuration
            slim-configuration?
            slim-configuration-slim
            slim-configuration-allow-empty-passwords?
            slim-configuration-auto-login?
            slim-configuration-default-user
            slim-configuration-theme
            slim-configuration-theme-name
            slim-configuration-xauth
            slim-configuration-shepherd
            slim-configuration-auto-login-session
            slim-configuration-xorg
            slim-configuration-display
            slim-configuration-vt
            slim-configuration-sessreg

            slim-service-type

            screen-locker-configuration
            screen-locker-configuration?
            screen-locker-configuration-name
            screen-locker-configuration-program
            screen-locker-configuration-allow-empty-password?
            screen-locker-configuration-using-pam?
            screen-locker-configuration-using-setuid?
            screen-locker-service-type
            screen-locker-service  ; deprecated

            localed-configuration
            localed-configuration?
            localed-service-type

            dconf-keyfile
            dconf-profile
            dconf-profile-name
            dconf-profile-content
            dconf-profile-keyfile
            dconf-service-type

            gdm-configuration
            gdm-service-type

            handle-xorg-configuration
            set-xorg-configuration))

;;; Commentary:
;;;
;;; Services that relate to the X Window System.
;;;
;;; Code:

(define %default-xorg-modules
  ;; Default list of modules loaded by the server.  When multiple drivers
  ;; match, the first one in the list is loaded.
  (list xf86-video-vesa
        xf86-video-fbdev
        xf86-video-amdgpu
        xf86-video-ati
        xf86-video-cirrus
        xf86-video-intel
        xf86-video-mach64
        xf86-video-nouveau
        xf86-video-nv
        xf86-video-sis

        ;; Libinput is the new thing and is recommended over evdev/synaptics:
        ;; <http://who-t.blogspot.fr/2015/01/xf86-input-libinput-compatibility-with.html>.
        xf86-input-libinput

        xf86-input-evdev
        xf86-input-keyboard
        xf86-input-mouse))

(define %default-xorg-fonts
  ;; Default list of fonts available to the X server.
  (list (file-append font-alias "/share/fonts/X11/75dpi")
        (file-append font-alias "/share/fonts/X11/100dpi")
        (file-append font-alias "/share/fonts/X11/misc")
        (file-append font-alias "/share/fonts/X11/cyrillic")
        (file-append font-misc-misc               ;default fonts for xterm
                     "/share/fonts/X11/misc")
        (file-append font-adobe75dpi "/share/fonts/X11/75dpi")))

(define %default-xorg-server-arguments
  ;; Default command-line arguments for X.
  '("-nolisten" "tcp"))

;; Configuration of an Xorg server.
(define-record-type* <xorg-configuration>
  xorg-configuration make-xorg-configuration
  xorg-configuration?
  (modules          xorg-configuration-modules    ;list of file-like
                    (thunked)
                    ; filter out modules not supported on current system
                    (default (filter
                              (lambda (p)
                                (member (%current-system)
                                        (package-supported-systems p)))
                              %default-xorg-modules)))
  (fonts            xorg-configuration-fonts      ;list of packges
                    (default %default-xorg-fonts))
  (drivers          xorg-configuration-drivers    ;list of strings
                    (default '()))
  (resolutions      xorg-configuration-resolutions ;list of tuples
                    (default '()))
  (keyboard-layout  xorg-configuration-keyboard-layout ;#f | <keyboard-layout>
                    (default #f))
  (extra-config     xorg-configuration-extra-config ;list of strings
                    (default '()))
  (server           xorg-configuration-server     ;file-like
                    (default xorg-server))
  (server-arguments xorg-configuration-server-arguments ;list of strings
                    (default %default-xorg-server-arguments)))

(define (xorg-configuration->file config)
  "Compute an Xorg configuration file corresponding to CONFIG, an
<xorg-configuration> record."
  (let ((xorg-server (xorg-configuration-server config)))
    (define all-modules
      ;; 'xorg-server' provides 'fbdevhw.so' etc.
      (append (xorg-configuration-modules config)
              (list xorg-server)))

    (define build
      #~(begin
          (use-modules (ice-9 match)
                       (srfi srfi-1)
                       (srfi srfi-26))

          (call-with-output-file #$output
            (lambda (port)
              (define drivers
                '#$(xorg-configuration-drivers config))

              (define (device-section driver)
                (string-append "
Section \"Device\"
  Identifier \"device-" driver "\"
  Driver \"" driver "\"
EndSection"))

              (define (screen-section driver resolutions)
                (string-append "
Section \"Screen\"
  Identifier \"screen-" driver "\"
  Device \"device-" driver "\"
  SubSection \"Display\"
    Modes "
  (string-join (map (match-lambda
                      ((x y)
                       (string-append "\"" (number->string x)
                                      "x" (number->string y) "\"")))
                    resolutions)) "
  EndSubSection
EndSection"))

              (define (input-class-section layout variant model options)
                (string-append "
Section \"InputClass\"
  Identifier \"evdev keyboard catchall\"
  MatchIsKeyboard \"on\"
  Option \"XkbLayout\" " (object->string layout)
  (if variant
      (string-append "  Option \"XkbVariant\" \""
                     variant "\"")
      "")
  (if model
      (string-append "  Option \"XkbModel\" \""
                     model "\"")
      "")
  (match options
    (()
     "")
    (_
     (string-append "  Option \"XkbOptions\" \""
                    (string-join options ",") "\""))) "

  MatchDevicePath \"/dev/input/event*\"
  Driver \"evdev\"
EndSection\n"))

              (define (expand modules)
                ;; Append to MODULES the relevant /lib/xorg/modules
                ;; sub-directories.
                (append-map (lambda (module)
                              (filter-map (lambda (directory)
                                            (let ((full (string-append module
                                                                       directory)))
                                              (and (file-exists? full)
                                                   full)))
                                          '("/lib/xorg/modules/drivers"
                                            "/lib/xorg/modules/input"
                                            "/lib/xorg/modules/multimedia"
                                            "/lib/xorg/modules/extensions")))
                            modules))

              (display "Section \"Files\"\n" port)
              (for-each (lambda (font)
                          (format port "  FontPath \"~a\"~%" font))
                        '#$(xorg-configuration-fonts config))
              (for-each (lambda (module)
                          (format port
                                  "  ModulePath \"~a\"~%"
                                  module))
                        (append (expand '#$all-modules)

                                ;; For fbdevhw.so and so on.
                                (list #$(file-append xorg-server
                                                     "/lib/xorg/modules"))))
              (display "EndSection\n" port)
              (display "
Section \"ServerFlags\"
  Option \"AllowMouseOpenFail\" \"on\"
EndSection\n" port)

              (display (string-join (map device-section drivers) "\n")
                       port)
              (newline port)
              (display (string-join
                        (map (cut screen-section <>
                                  '#$(xorg-configuration-resolutions config))
                             drivers)
                        "\n")
                       port)
              (newline port)

              (let ((layout  #$(and=> (xorg-configuration-keyboard-layout config)
                                      keyboard-layout-name))
                    (variant #$(and=> (xorg-configuration-keyboard-layout config)
                                      keyboard-layout-variant))
                    (model   #$(and=> (xorg-configuration-keyboard-layout config)
                                      keyboard-layout-model))
                    (options '#$(and=> (xorg-configuration-keyboard-layout config)
                                       keyboard-layout-options)))
                (when layout
                  (display (input-class-section layout variant model options)
                           port)
                  (newline port)))

              (for-each (lambda (config)
                          (display config port))
                        '#$(xorg-configuration-extra-config config))))))

    (computed-file "xserver.conf" build)))

(define (xorg-configuration-directory modules)
  "Return a directory that contains the @code{.conf} files for X.org that
includes the @code{share/X11/xorg.conf.d} directories of each package listed
in @var{modules}."
  (with-imported-modules '((guix build utils))
    (computed-file "xorg.conf.d"
                   #~(begin
                       (use-modules (guix build utils)
                                    (srfi srfi-1))

                       (define files
                         (append-map (lambda (module)
                                       (find-files (string-append
                                                    module
                                                    "/share/X11/xorg.conf.d")
                                                   "\\.conf$"))
                                     (list #$@modules)))

                       (mkdir #$output)
                       (for-each (lambda (file)
                                   (symlink file
                                            (string-append #$output "/"
                                                           (basename file))))
                                 files)
                       #t))))

(define (xorg-configuration-server-package-path config input path)
  "Lookup the direct @var{input} in the xorg server package of @var{config}
and append @var{path} to it."
  (let* ((server (xorg-configuration-server config))
         (package (lookup-package-direct-input server input)))
    (when package (file-append package path))))

(define (xorg-configuration-dri-driver-path config)
  (xorg-configuration-server-package-path config "mesa" "/lib/dri"))

(define (xorg-configuration-xkb-bin-dir config)
  (xorg-configuration-server-package-path config "xkbcomp" "/bin"))

(define (xorg-configuration-xkb-dir config)
  (xorg-configuration-server-package-path config "xkeyboard-config" "/share/X11/xkb"))

(define* (xorg-wrapper #:optional (config (xorg-configuration)))
  "Return a derivation that builds a script to start the X server with the
given @var{config}.  The resulting script should be used in place of
@code{/usr/bin/X}."
  (define exp
    ;; Write a small wrapper around the X server.
    #~(begin
        (setenv "XORG_DRI_DRIVER_PATH"
                #$(xorg-configuration-dri-driver-path config))
        (setenv "XKB_BINDIR" #$(xorg-configuration-xkb-bin-dir config))

        (let ((X (string-append #$(xorg-configuration-server config) "/bin/X")))
          (apply execl X X
                 "-xkbdir" #$(xorg-configuration-xkb-dir config)
                 "-config" #$(xorg-configuration->file config)
                 "-configdir" #$(xorg-configuration-directory
                                 (xorg-configuration-modules config))
                 (cdr (command-line))))))

  (program-file "X-wrapper" exp))

(define* (xorg-start-command #:optional (config (xorg-configuration)))
  "Return a @code{startx} script in which the modules, fonts, etc. specified
in @var{config}, are available.  The result should be used in place of
@code{startx}."
  (define X
    (xorg-wrapper config))

  (define exp
    ;; Write a small wrapper around the X server.
    #~(apply execl #$X #$X ;; Second #$X is for argv[0].
             "-logverbose" "-verbose" "-terminate"
             #$@(xorg-configuration-server-arguments config)
              (cdr (command-line))))

  (program-file "startx" exp))

(define* (xinitrc #:key fallback-session)
  "Return a system-wide xinitrc script that starts the specified X session,
which should be passed to this script as the first argument.  If not, the
@var{fallback-session} will be used or, if @var{fallback-session} is false, a
desktop session from the system or user profile will be used."
  (define builder
    #~(begin
        (use-modules (ice-9 match)
                     (ice-9 regex)
                     (ice-9 ftw)
                     (ice-9 rdelim)
                     (srfi srfi-1)
                     (srfi srfi-26))

        (define (close-all-fdes)
          ;; Close all the open file descriptors except 0 to 2.
          (let loop ((fd 3))
            (when (< fd 4096)               ;FIXME: use sysconf + _SC_OPEN_MAX
              (false-if-exception (close-fdes fd))
              (loop (+ 1 fd)))))

        (define (exec-from-login-shell command . args)
          ;; Run COMMAND from a login shell so that it gets to see the same
          ;; environment variables that one gets when logging in on a tty, for
          ;; instance.
          (let* ((pw    (getpw (getuid)))
                 (shell (passwd:shell pw)))
            ;; Close any open file descriptors.  This is all the more
            ;; important that SLiM itself exec's us directly without closing
            ;; its own file descriptors!
            (close-all-fdes)

            ;; The '--login' option is supported at least by Bash and zsh.
            (execl shell shell "--login" "-c"
                   (string-join (cons command args)))))

        (define system-profile
          "/run/current-system/profile")

        (define user-profile
          (and=> (getpw (getuid))
                 (lambda (pw)
                   (string-append (passwd:dir pw) "/.guix-profile"))))

        (define (xsession-command desktop-file)
          ;; Read from DESKTOP-FILE its X session command and return it as a
          ;; list.
          (define exec-regexp
            (make-regexp "^[[:blank:]]*Exec=(.*)$"))

          (call-with-input-file desktop-file
            (lambda (port)
              (let loop ()
                (match (read-line port)
                  ((? eof-object?) #f)
                  ((= (cut regexp-exec exec-regexp <>) result)
                   (if result
                       (string-tokenize (match:substring result 1))
                       (loop))))))))

        (define (find-session profile)
          ;; Return an X session command from PROFILE or #f if none was found.
          (let ((directory (string-append profile "/share/xsessions")))
            (match (scandir directory
                            (cut string-suffix? ".desktop" <>))
              ((or () #f)
               #f)
              ((sessions ...)
               (any xsession-command
                    (map (cut string-append directory "/" <>)
                         sessions))))))

        (let* ((home          (getenv "HOME"))
               (xsession-file (string-append home "/.xsession"))
               (session       (match (command-line)
                                ((_)
                                 #$(if fallback-session
                                       #~(list #$fallback-session)
                                       #f))
                                ((_ x ..1)
                                 x))))
          (if (file-exists? xsession-file)
              ;; Run ~/.xsession when it exists.
              (apply exec-from-login-shell xsession-file
                     (or session '()))
              ;; Otherwise, start the specified session or a fallback.
              (apply exec-from-login-shell
                     (or session
                         (find-session user-profile)
                         (find-session system-profile)))))))

  (program-file "xinitrc" builder))

(define-syntax handle-xorg-configuration
  (syntax-rules ()
    "Generate the `compose' and `extend' entries of a login manager
`service-type' to handle specifying the `xorg-configuration' through
a `service-extension', as used by `set-xorg-configuration'."
    ((_ configuration-record service-type-definition)
     (service-type
       (inherit service-type-definition)
       (compose (lambda (extensions)
                  (match extensions
                    (() #f)
                    ((config . _) config))))
       (extend (lambda (config xorg-configuration)
                 (if xorg-configuration
                     (configuration-record
                      (inherit config)
                      (xorg-configuration xorg-configuration))
                     config)))))))

(define (xorg-server-profile-service config)
  ;; XXX: profile-service-type only accepts <package> objects.
  (list
   (package
     (name "xorg-wrapper")
     (version (package-version xorg-server))
     (source (xorg-wrapper config))
     (build-system trivial-build-system)
     (arguments
      '(#:modules ((guix build utils))
        #:builder
        (begin
          (use-modules (guix build utils))
          (let* ((source (assoc-ref %build-inputs "source"))
                 (out (assoc-ref %outputs "out"))
                 (bin (string-append out "/bin")))
            (mkdir-p bin)
            (symlink source (string-append bin "/X"))
            (symlink source (string-append bin "/Xorg"))
            #t))))
     (home-page (package-home-page xorg-server))
     (synopsis (package-synopsis xorg-server))
     (description (package-description xorg-server))
     (license (package-license xorg-server)))))

(define xorg-server-service-type
  (service-type
   (name 'xorg-server)
   (extensions
    (list (service-extension profile-service-type
                             xorg-server-profile-service)))
   (default-value (xorg-configuration))
   (description "Add @command{X} to the system profile, to be used with
@command{sx} or @command{xinit}.")))


;;;
;;; SLiM log-in manager.
;;;

(define %default-slim-theme
  ;; Theme based on work by Felipe López.
  (file-append %artwork-repository "/slim"))

(define %default-slim-theme-name
  ;; This must be the name of the sub-directory in %DEFAULT-SLIM-THEME that
  ;; contains the actual theme files.
  "1.x")

(define-record-type* <slim-configuration>
  slim-configuration make-slim-configuration
  slim-configuration?
  (slim slim-configuration-slim
        (default slim))
  (allow-empty-passwords? slim-configuration-allow-empty-passwords?
                          (default #t))
  (gnupg? slim-configuration-gnupg?
          (default #f))
  (auto-login? slim-configuration-auto-login?
               (default #f))
  (default-user slim-configuration-default-user
                (default ""))
  (theme slim-configuration-theme
         (default %default-slim-theme))
  (theme-name slim-configuration-theme-name
              (default %default-slim-theme-name))
  (xauth slim-configuration-xauth
         (default xauth))
  (shepherd slim-configuration-shepherd
            (default shepherd))
  (auto-login-session slim-configuration-auto-login-session
                      (default #f))
  (xorg-configuration slim-configuration-xorg
                      (default (xorg-configuration)))
  (display slim-configuration-display
           (default ":0"))
  (vt slim-configuration-vt
      (default "vt7"))
  (sessreg slim-configuration-sessreg
           (default sessreg)))

(define (slim-pam-service config)
  "Return a PAM service for @command{slim}."
  (list (unix-pam-service
         "slim"
         #:login-uid? #t
         #:allow-empty-passwords?
         (slim-configuration-allow-empty-passwords? config)
         #:gnupg?
         (slim-configuration-gnupg? config))))

(define (slim-shepherd-service config)
  (let* ((xinitrc (xinitrc #:fallback-session
                           (slim-configuration-auto-login-session config)))
         (xauth   (slim-configuration-xauth config))
         (startx  (xorg-start-command (slim-configuration-xorg config)))
         (display (slim-configuration-display config))
         (vt (slim-configuration-vt config))
         (shepherd   (slim-configuration-shepherd config))
         (theme-name (slim-configuration-theme-name config))
         (sessreg (slim-configuration-sessreg config))
         (lockfile (string-append "/var/run/slim-" vt ".lock")))
    (define slim.cfg
      (mixed-text-file "slim.cfg"  "
default_path /run/current-system/profile/bin
default_xserver " startx "
display_name " display "
xserver_arguments " vt "
xauth_path " xauth "/bin/xauth
authfile /var/run/slim-" vt ".auth
lockfile " lockfile "
logfile /var/log/slim-" vt ".log

# The login command.  '%session' is replaced by the chosen session name, one
# of the names specified in the 'sessions' setting: 'wmaker', 'xfce', etc.
login_cmd  exec " xinitrc " %session
sessiondir /run/current-system/profile/share/xsessions
session_msg session (F1 to change):
sessionstart_cmd " sessreg "/bin/sessreg -a -l $DISPLAY %user
sessionstop_cmd " sessreg "/bin/sessreg -d -l $DISPLAY %user

halt_cmd " shepherd "/sbin/halt
reboot_cmd " shepherd "/sbin/reboot\n"
(if (slim-configuration-auto-login? config)
    (string-append "auto_login yes\ndefault_user "
                   (slim-configuration-default-user config) "\n")
    "")
(if theme-name
    (string-append "current_theme " theme-name "\n")
    "")))

    (define theme
      (slim-configuration-theme config))

    (list (shepherd-service
           (documentation "Xorg display server")
           (provision (append
                       ;; For compatibility, also provide 'xorg-server'.
                       (if (string=? vt "vt7")
                           '(xorg-server)
                           '())

                       (list (symbol-append 'xorg-server-
                                            (string->symbol vt)))))
           (requirement '(pam user-processes host-name udev))
           (start
            #~(lambda ()
                ;; A stale lock file can prevent SLiM from starting, so remove it to
                ;; be on the safe side.
                (false-if-exception (delete-file lockfile))

                (fork+exec-command
                 (list (string-append #$(slim-configuration-slim config)
                                      "/bin/slim")
                       "-nodaemon")
                 #:environment-variables
                 (list (string-append "SLIM_CFGFILE=" #$slim.cfg)
                       #$@(if theme
                              (list #~(string-append "SLIM_THEMESDIR=" #$theme))
                              #~())))))
           (stop #~(make-kill-destructor))
           (respawn? #t)))))

(define slim-service-type
  (handle-xorg-configuration slim-configuration
    (service-type (name 'slim)
                  (extensions
                   (list (service-extension shepherd-root-service-type
                                            slim-shepherd-service)
                         (service-extension pam-root-service-type
                                            slim-pam-service)))
                  (default-value (slim-configuration))
                  (description
                   "Run the SLiM graphical login manager for X11."))))


;;;
;;; Screen lockers & co.
;;;

(define-configuration/no-serialization screen-locker-configuration
  (name
   string
   "Name of the screen locker.")
  (program
   file-like
   "Path to the executable for the screen locker as a G-Expression.")
  (allow-empty-password?
   (boolean #f)
   "Whether to allow empty passwords.")
  (using-pam?
   (boolean #t)
   "Whether to setup PAM entry.")
  (using-setuid?
   (boolean #t)
   "Whether to setup program as setuid binary."))

(define (screen-locker-pam-services config)
  (match-record config <screen-locker-configuration>
    (name allow-empty-password? using-pam?)
    (if using-pam?
        (list (unix-pam-service name
                                #:allow-empty-passwords?
                                allow-empty-password?))
        '())))

(define (screen-locker-setuid-programs config)
  (match-record config <screen-locker-configuration>
    (name program using-setuid?)
    (if using-setuid?
        (list (file-like->setuid-program program))
        '())))

(define screen-locker-service-type
  (service-type (name 'screen-locker)
                (extensions
                 (list (service-extension pam-root-service-type
                                          screen-locker-pam-services)
                       (service-extension setuid-program-service-type
                                          screen-locker-setuid-programs)))
                (description
                 "Allow the given program to be used as a screen locker for
the graphical server by making it setuid-root, so it can authenticate users,
and by creating a PAM service for it.")))

(define (screen-locker-generate-doc)
  (configuration->documentation 'screen-locker-configuration))

(define-deprecated (screen-locker-service package
                                          #:optional
                                          (program (package-name package))
                                          #:key allow-empty-passwords?)
  screen-locker-service-type
  "Add @var{package}, a package for a screen locker or screen saver whose
command is @var{program}, to the set of setuid programs and add a PAM entry
for it.  For example:

@lisp
 (screen-locker-service xlockmore \"xlock\")
@end lisp

makes the good ol' XlockMore usable."
  (service screen-locker-service-type
           (screen-locker-configuration
            (name program)
            (program (file-append package "/bin/" program))
            (allow-empty-password? allow-empty-passwords?))))


;;;
;;; Locale service.
;;;

(define-record-type* <localed-configuration>
  localed-configuration make-localed-configuration
  localed-configuration?
  (localed         localed-configuration-localed
                   (default localed))
  (keyboard-layout localed-configuration-keyboard-layout
                   (default #f)))

(define (localed-dbus-service config)
  "Return the 'localed' D-Bus service for @var{config}, a
@code{<localed-configuration>} record."
  (define keyboard-layout
    (localed-configuration-keyboard-layout config))

  ;; The primary purpose of 'localed' is to tell GDM what the "current" Xorg
  ;; keyboard layout is.  If 'localed' is missing, or if it's unable to
  ;; determine the current XKB layout, then GDM forcefully installs its
  ;; default XKB config (US English).  Here we communicate the configured
  ;; layout through environment variables.

  (if keyboard-layout
      (let* ((layout  (keyboard-layout-name keyboard-layout))
             (variant (keyboard-layout-variant keyboard-layout))
             (model   (keyboard-layout-model keyboard-layout))
             (options (keyboard-layout-options keyboard-layout)))
        (list (wrapped-dbus-service
               (localed-configuration-localed config)
               "libexec/localed/localed"
               `(("GUIX_XKB_LAYOUT" ,layout)
                 ,@(if variant
                       `(("GUIX_XKB_VARIANT" ,variant))
                       '())
                 ,@(if model
                       `(("GUIX_XKB_MODEL" ,model))
                       '())
                 ,@(if (null? options)
                       '()
                       `(("GUIX_XKB_OPTIONS"
                          ,(string-join options ","))))))))
      '()))

(define localed-service-type
  (let ((package (lambda (config)
                   ;; Don't bother if the user didn't specify any keyboard
                   ;; layout.
                   (if (localed-configuration-keyboard-layout config)
                       (list (localed-configuration-localed config))
                       '()))))
    (service-type (name 'localed)
                  (extensions
                   (list (service-extension dbus-root-service-type
                                            localed-dbus-service)
                         (service-extension udev-service-type package)
                         (service-extension polkit-service-type package)

                         ;; Add 'localectl' to the profile.
                         (service-extension profile-service-type package)))

                  ;; This service can be extended, typically by the X login
                  ;; manager, to communicate the chosen Xorg keyboard layout.
                  (compose (lambda (extensions)
                             (find keyboard-layout? extensions)))
                  (extend (lambda (config keyboard-layout)
                            (localed-configuration
                             (inherit config)
                             (keyboard-layout keyboard-layout))))
                  (description
                   "Run the locale daemon, @command{localed}, which can be used
to control the system locale and keyboard mapping from user programs such as
the GNOME desktop environment.")
                  (default-value (localed-configuration)))))


;;;
;;; Dconf.
;;;

(define-maybe text-config)

(define-configuration/no-serialization dconf-keyfile
  (name string
        "The file name of the associated keyfile, e.g. \"00-login-screen\".")
  (content text-config "The content of the associated keyfile."))

(define-configuration/no-serialization dconf-profile
  (name string "The file name of the dconf system profile, which should match
the name of a user for which the profile is to be used with.  To have the
profile used, the environment variable \"DCONF_PROFILE\" should be set to the
profile file, e.g.:
@example
 export DCONF_PROFILE=/etc/dconf/profile/gdm
@end example")
  (content maybe-text-config "The content of the Dconf profile.  Unless
provided, it defaults to include the user database (\"user-db:NAME\") as well
as the system database (\"system-db:NAME\"), which corresponds to the
generated database, @file{/etc/dconf/db/NAME}.")
  (keyfile dconf-keyfile "The keyfile associated with the profile"))

(define dconf-profiles?
  (list-of dconf-profile?))

(define-configuration/no-serialization dconf-configuration
  (profiles dconf-profiles "The list of <dconf-profile> objects to populate."))

(define (dconf-profile->profile-file profile)
  "Given PROFILE, a <dconf-profile> object, return a dconf profile file."
  (let ((name (dconf-profile-name profile))
        (content (dconf-profile-content profile)))
    (apply mixed-text-file
           name
           (if (maybe-value-set? content)
               (interpose content "\n" 'suffix)
               (interpose (list (string-append "user-db:" name)
                                (string-append "system-db:" name))
                          "\n" 'suffix)))))

(define (dconf-profile->db-keyfile profile)
  "Given PROFILE, a <dconf-profile> object, return a dconf profile file."
  (let ((keyfile (dconf-profile-keyfile profile)))
    (apply mixed-text-file (dconf-keyfile-name keyfile)
           (interpose (dconf-keyfile-content keyfile) "\n" 'suffix))))

(define (dconf-profile->db-keyfile-dir profile)
  "Wrap the keyfile in a directory, to satisfy 'dconf compile'."
  (let ((name (dconf-profile-name profile))
        (keyfile-name (dconf-keyfile-name (dconf-profile-keyfile profile))))
    (computed-file name
                   #~(begin
                       (mkdir #$output)
                       (symlink #$(dconf-profile->db-keyfile profile)
                                (string-append #$output "/" #$keyfile-name))))))

(define (dconf-profile->db profile)
  "Compile the a <dconf-profile> object into a GVariant Database file."
  (let ((name (dconf-profile-name profile)))
    (computed-file
     name
     (with-imported-modules '((guix build utils))
       #~(begin
           (use-modules (guix build utils))
           (setenv "DCONF_PROFILE" #$(dconf-profile->profile-file profile))
           (invoke #$(file-append dconf "/bin/dconf") "compile"
                   #$output #$(dconf-profile->db-keyfile-dir profile)))))))

(define (dconf-profile->files profile)
  "Given PROFILE, a <dconf-profile> object, return a dconf directory
containing the associated profile, keyfile and database files to be assembled
under /etc."
  (let ((name (dconf-profile-name profile))
        (keyfile-name (dconf-keyfile-name (dconf-profile-keyfile profile))))
    (list (list (string-append "dconf/profile/" name)
                (dconf-profile->profile-file profile))
          (list (string-append "dconf/db/" name ".d/" keyfile-name)
                (dconf-profile->db-keyfile profile))
          (list (string-append "dconf/db/" name)
                (dconf-profile->db profile)))))

(define dconf-service-type
  (service-type
   (name 'dconf-profile)
   (extensions
    (list (service-extension etc-service-type
                             (lambda (dconf-profiles)
                               (append-map dconf-profile->files
                                           dconf-profiles)))))
   (compose concatenate)
   (extend append)
   (default-value '())
   (description "Extend the @code{etc-service-type} to populate the file
hierarchy under @file{/etc/dconf} with the <dconf-profile> objects provided as
argument.")))


;;;
;;; GNOME Desktop Manager.
;;;

(define %gdm-accounts
  (list (user-group (name "gdm") (system? #t))
        (user-account
         (name "gdm")
         (group "gdm")
         (supplementary-groups '("video"))
         (system? #t)
         (comment "GNOME Display Manager user")
         (home-directory "/var/lib/gdm")
         (shell (file-append shadow "/sbin/nologin")))))

(define dbus-daemon-wrapper
  (program-file
   "gdm-dbus-wrapper"
   #~(begin
       (use-modules (srfi srfi-26))

       (define system-profile
         "/run/current-system/profile")

       (define user-profile
         (and=> (getpw (getuid))
                (lambda (pw)
                  (string-append (passwd:dir pw) "/.guix-profile"))))

       ;; If we are able to find the user's profile, we can add it to
       ;; the search paths set below.  We need to do this so that D-Bus
       ;; can start services installed by the user.  This allows
       ;; applications that require session D-Bus services (e.g,
       ;; 'evolution') to work even if those services are only available
       ;; in the user's profile.  See <https://bugs.gnu.org/35267>.
       (define profiles
         (if user-profile
             (list user-profile system-profile)
             (list system-profile)))

       (setenv "XDG_CONFIG_DIRS"
               (string-join (map (cut string-append <> "/etc/xdg") profiles)
                            ":"))
       (setenv "XDG_DATA_DIRS"
               (string-join (map (cut string-append <> "/share") profiles)
                            ":"))
       (apply execl (string-append #$dbus "/bin/dbus-daemon")
              (program-arguments)))))

;; Wrapper script for Wayland sessions, similar to Xsession.
;;
;; See `xinitrc`.  By default, it launches the specified session through a
;; login shell.  With the default Guix configuration, this should source
;; /etc/profile, setting up the Guix profile environment variables.  However,
;; gdm launches its own graphical session through the same method, so we need
;; to ignore this case, since `gdm` doesn't have a login shell.
(define gdm-wayland-session-wrapper
  (program-file
   "gdm-wayland-session-wrapper"
   #~((let* ((user (getpw (getuid)))
	    (name (passwd:name user))
	    (shell (passwd:shell user))
	    (args (cdr (command-line))))
        (if (string=? name "gdm")
	    (apply execl (cons (car args) args))
	    (execl shell shell "--login" "-c" (string-join args)))))))

(define-record-type* <gdm-configuration>
  gdm-configuration make-gdm-configuration
  gdm-configuration?
  (gdm gdm-configuration-gdm (default gdm))
  (allow-empty-passwords? gdm-configuration-allow-empty-passwords? (default #t))
  (auto-login? gdm-configuration-auto-login? (default #f))
  (auto-suspend? gdm-configuration-auto-suspend? (default #t))
  (dbus-daemon gdm-configuration-dbus-daemon (default dbus-daemon-wrapper))
  (debug? gdm-configuration-debug? (default #f))
  (default-user gdm-configuration-default-user (default #f))
  (gnome-shell-assets gdm-configuration-gnome-shell-assets
                      (default (list adwaita-icon-theme font-abattis-cantarell)))
  (xorg-configuration gdm-configuration-xorg
                      (default (xorg-configuration)))
  (x-session gdm-configuration-x-session
             (default (xinitrc)))
  (xdmcp? gdm-configuration-xdmcp?
          (default #f))
  (wayland? gdm-configuration-wayland? (default #f))
  (wayland-session gdm-configuration-wayland-session
                   (default gdm-wayland-session-wrapper)))

(define (gdm-dconf-profiles config)
  (if (gdm-configuration-auto-suspend? config)
      '()
      ;; This custom gconf profile works around a lack of configuration option
      ;; to disable auto-suspend when no users are physically logged in (see:
      ;; https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/22).
      (list (dconf-profile
             (name "gdm")
             (content (list #~(begin
                                (use-modules (ice-9 textual-ports))
                                (string-trim
                                 (call-with-input-file
                                     #$(file-append gdm "/share/dconf/profile/gdm")
                                   get-string-all)))
                            "system-db:gdm"))
             (keyfile (dconf-keyfile
                       (name "00-disable-suspend")
                       (content
                        (list "[org/gnome/settings-daemon/plugins/power]"
                              "sleep-inactive-ac-type='nothing'"
                              "sleep-inactive-battery-type='nothing'"
                              "sleep-inactive-ac-timeout=0"
                              "sleep-inactive-battery-timeout=0"))))))))

(define (gdm-configuration-file config)
  (mixed-text-file "gdm-custom.conf"
                   "[daemon]\n"
                   "#User=gdm\n"
                   "#Group=gdm\n"
                   (if (gdm-configuration-auto-login? config)
                       (string-append
                        "AutomaticLoginEnable=true\n"
                        "AutomaticLogin="
                        (or (gdm-configuration-default-user config)
                            (error "missing default user for auto-login"))
                        "\n")
                       (string-append
                        "AutomaticLoginEnable=false\n"
                        "#AutomaticLogin=\n"))
                   "#TimedLoginEnable=false\n"
                   "#TimedLogin=\n"
                   "#TimedLoginDelay=0\n"
                   ;; Disable initial system setup inside GDM.
                   ;; Whatever settings are set there should already be
                   ;; taken care of through `guix system'.
                   ;; See also
                   ;; <https://debbugs.gnu.org/cgi/bugreport.cgi?bug=39281>.
                   "InitialSetupEnable=false\n"
                   (format #f "WaylandEnable=~:[false~;true~]~%"
                           (gdm-configuration-wayland? config))
                   "\n"
                   "[debug]\n"
                   (format #f "Enable=~:[false~;true~]~%"
                           (gdm-configuration-debug? config))
                   "\n"
                   "[security]\n"
                   "#DisallowTCP=true\n"
                   "#AllowRemoteAutoLogin=false\n"
                   "\n"
                   "[xdmcp]\n"
                   (format #f "Enable=~:[false~;true~]~%"
                           (gdm-configuration-xdmcp? config))))

(define (gdm-pam-service config)
  "Return a PAM service for @command{gdm}."
  (list
   (pam-service
    (inherit (unix-pam-service "gdm-autologin"
                               #:login-uid? #t))
    (auth (list (pam-entry
                 (control "optional")
                 (module (file-append (gdm-configuration-gdm config)
                                      "/lib/security/pam_gdm.so")))
                (pam-entry
                 (control "sufficient")
                 (module "pam_permit.so")))))
   (pam-service
    (inherit (unix-pam-service "gdm-launch-environment"))
    (auth (list (pam-entry
                 (control "required")
                 (module "pam_permit.so")))))
   (unix-pam-service "gdm-password"
                     #:login-uid? #t
                     #:allow-empty-passwords?
                     (gdm-configuration-allow-empty-passwords? config))))

(define (gdm-shepherd-service config)
  (define config-file
    (gdm-configuration-file config))

  (list (shepherd-service
         (documentation "Xorg display server (GDM)")
         (provision '(xorg-server))
         (requirement '(dbus-system pam user-processes host-name udev elogind))
         (start #~(lambda ()
                    (fork+exec-command
                     (list #$(file-append (gdm-configuration-gdm config)
                                          "/bin/gdm"))
                     #:environment-variables
                     (list #$@(if (gdm-configuration-auto-suspend? config)
                                  #~()
                                  #~("DCONF_PROFILE=/etc/dconf/profile/gdm"))
                           (string-append "GDM_CUSTOM_CONF=" #$config-file)
                           (string-append
                            "GDM_DBUS_DAEMON="
                            #$(gdm-configuration-dbus-daemon config))
                           (string-append
                            "GDM_X_SERVER="
                            #$(xorg-wrapper
                               (gdm-configuration-xorg config)))
                           (string-append
                            "GDM_X_SESSION="
                            #$(gdm-configuration-x-session config))
                           (string-append
                            "XDG_DATA_DIRS="
                            ((lambda (ls) (string-join ls ":"))
                             (map (lambda (path)
                                    (string-append path "/share"))
                                  ;; XXX: Remove gnome-shell below when GDM
                                  ;; can depend on GNOME Shell directly.
                                  (cons #$gnome-shell
                                        '#$(gdm-configuration-gnome-shell-assets
                                            config)))))
                           ;; Add XCURSOR_PATH so that mutter can find its
                           ;; cursors.  gdm doesn't login so doesn't source
                           ;; the corresponding line in /etc/profile.
                           "XCURSOR_PATH=/run/current-system/profile/share/icons"
                           (string-append
                            "GDK_PIXBUF_MODULE_FILE="
                            #$gnome-shell "/" #$%gdk-pixbuf-loaders-cache-file)
                           (string-append
                            "GDM_WAYLAND_SESSION="
                            #$(gdm-configuration-wayland-session config))))))
         (stop #~(make-kill-destructor))
         (actions (list (shepherd-configuration-action config-file)))
         (respawn? #t))))

(define gdm-polkit-rules
  (lambda (config)
    (if (gdm-configuration-xdmcp? config)
        ;; Allow remote (XDMCP) users to use colord; otherwise an
        ;; authentication dialog would appear on the GDM screen (see the
        ;; upstream bug:
        ;; https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/issues/273).
        (list (computed-file
               "02-allow-colord.rules"
               (with-imported-modules '((guix build utils))
                 #~(begin
                     (use-modules (guix build utils))

                     (let* ((rules.d
                             (string-append #$output
                                            "/share/polkit-1"
                                            "/rules.d"))
                            (allow-colord.rules (string-append
                                                 rules.d
                                                 "/02-allow-colord.rules")))
                       (mkdir-p rules.d)
                       (call-with-output-file allow-colord.rules
                         (lambda (port)
                           ;; This workaround enables any local or remote in
                           ;; the "users" group to use colord (see:
                           ;; https://c-nergy.be/blog/?p=12073).
                           (format port "\
polkit.addRule(function(action, subject) {
   if (action.id.match(\"org.freedesktop.color-manager\")) {
      polkit.log(\"POLKIT DEBUG returning YES for action: \" + action);
      return polkit.Result.YES;
   }
});~%"))))))))
        '())))

(define gdm-service-type
  (handle-xorg-configuration gdm-configuration
    (service-type (name 'gdm)
                  (extensions
                   (list (service-extension shepherd-root-service-type
                                            gdm-shepherd-service)
                         (service-extension account-service-type
                                            (const %gdm-accounts))
                         (service-extension dconf-service-type
                                            gdm-dconf-profiles)
                         (service-extension pam-root-service-type
                                            gdm-pam-service)
                         (service-extension polkit-service-type
                                            gdm-polkit-rules)
                         (service-extension profile-service-type
                                            gdm-configuration-gnome-shell-assets)
                         (service-extension dbus-root-service-type
                                            (compose list
                                                     gdm-configuration-gdm))
                         (service-extension localed-service-type
                                            (compose
                                             xorg-configuration-keyboard-layout
                                             gdm-configuration-xorg))))
                  (default-value (gdm-configuration))
                  (description
                   "Run the GNOME Desktop Manager (GDM), a program that allows
you to log in in a graphical session, whether or not you use GNOME."))))

;; Since GDM depends on Rust (gdm -> gnome-shell -> gjs -> mozjs -> rust)
;; and Rust is currently unavailable on non-x86_64 platforms, default to
;; SDDM there (FIXME).
(define* (set-xorg-configuration config
                                 #:optional
                                 (login-manager-service-type
                                  (if (target-x86-64?)
                                      gdm-service-type
                                      sddm-service-type)))
  "Tell the log-in manager (of type @var{login-manager-service-type}) to use
@var{config}, an <xorg-configuration> record."
  (simple-service 'set-xorg-configuration
                  login-manager-service-type
                  config))

;;; xorg.scm ends here