gnu: graphene: Fix build on armhf-linux. - guix

diff options

author	Efraim Flashner <efraim@flashner.co.il>	2024-05-02 17:03:15 +0300
committer	Efraim Flashner <efraim@flashner.co.il>	2024-05-06 23:16:31 +0300
commit	f14513b660b213b79e203529929fccec5325d7a0 (patch)
tree	d4badda367d1d0c3f05f517af72d7026a3cb4d91 /gnu/tests/cachefilesd.scm
parent	c5db054e645427890e12b85e8273eceefa8ccc26 (diff)
download	guix-f14513b660b213b79e203529929fccec5325d7a0.tar.gz guix-f14513b660b213b79e203529929fccec5325d7a0.zip

gnu: graphene: Fix build on armhf-linux.

* gnu/packages/gtk.scm (graphene)[arguments]: When building for armhf-linux add a configure-flag to disable neon optimizations. Change-Id: I42b412d3f7536180e959e268b68f2c292edda749

Diffstat (limited to 'gnu/tests/cachefilesd.scm')

0 files changed, 0 insertions, 0 deletions

n121' href='#n121'>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 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015-2024 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2021 raid5atemyhomework <raid5atemyhomework@protonmail.com>
;;; Copyright © 2020 Christine Lemmer-Webber <cwebber@dustycloud.org>
;;; Copyright © 2020, 2021 Brice Waegeneire <brice@waegenei.re>
;;; Copyright © 2023 Brian Cully <bjc@spork.org>
;;; Copyright © 2024 Nicolas Graves <ngraves@ngraves.fr>
;;;
;;; 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)
  #:use-module (guix gexp)
  #:use-module (guix monads)
  #:use-module (guix store)
  #:use-module (guix records)
  #:use-module (guix profiles)
  #:use-module (guix discovery)
  #:use-module (guix combinators)
  #:use-module (guix channels)
  #:use-module (guix describe)
  #:use-module (guix sets)
  #:use-module (guix ui)
  #:use-module (guix diagnostics)
  #:autoload   (guix openpgp) (openpgp-format-fingerprint)
  #:use-module (guix modules)
  #:use-module (guix packages)
  #:use-module (guix utils)
  #:use-module (guix deprecation)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages hurd)
  #:use-module (gnu system setuid)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-9)
  #:use-module (srfi srfi-9 gnu)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (srfi srfi-71)
  #:use-module (ice-9 vlist)
  #:use-module (ice-9 match)
  #:autoload   (ice-9 pretty-print) (pretty-print)
  #:export (service-extension
            service-extension?
            service-extension-target
            service-extension-compute

            service-type
            service-type?
            service-type-name
            service-type-extensions
            service-type-compose
            service-type-extend
            service-type-default-value
            service-type-description
            service-type-location

            %service-type-path
            fold-service-types
            lookup-service-types

            service
            service?
            service-kind
            service-value
            service-parameters                    ;deprecated

            simple-service
            modify-services
            service-back-edges
            instantiate-missing-services
            fold-services

            remove-service-extensions
            for-home
            for-home?

            validate-service-list

            service-error?
            missing-value-service-error?
            missing-value-service-error-type
            missing-value-service-error-location
            missing-target-service-error?
            missing-target-service-error-service
            missing-target-service-error-target-type
            ambiguous-target-service-error?
            ambiguous-target-service-error-service
            ambiguous-target-service-error-target-type

            system-service-type
            provenance-service-type
            sexp->system-provenance
            system-provenance
            boot-service-type
            cleanup-service-type
            activation-service-type
            activation-service->script
            %linux-bare-metal-service
            %hurd-rc-script
            %hurd-startup-service
            special-files-service-type
            extra-special-file
            etc-service-type
            etc-directory
            setuid-program-service-type
            profile-service-type
            firmware-service-type
            gc-root-service-type
            linux-builder-service-type
            linux-builder-configuration
            linux-builder-configuration?
            linux-builder-configuration-kernel
            linux-builder-configuration-modules
            linux-loadable-module-service-type

            %boot-service
            %activation-service
            etc-service)  ; deprecated
  #:re-export (;; Note: Re-export 'delete' to allow for proper syntax matching
               ;; in 'modify-services' forms.  See
               ;; <https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26805#16>.
               delete))

;;; Comment:
;;;
;;; This module defines a broad notion of "service types" and "services."
;;;
;;; A service type describe how its instances extend instances of other
;;; service types.  For instance, some services extend the instance of
;;; ACCOUNT-SERVICE-TYPE by providing it with accounts and groups to create;
;;; others extend SHEPHERD-ROOT-SERVICE-TYPE by passing it instances of
;;; <shepherd-service>.
;;;
;;; When applicable, the service type defines how it can itself be extended,
;;; by providing one procedure to compose extensions, and one procedure to
;;; extend itself.
;;;
;;; A notable service type is SYSTEM-SERVICE-TYPE, which has a single
;;; instance, which is the root of the service DAG.  Its value is the
;;; derivation that produces the 'system' directory as returned by
;;; 'operating-system-derivation'.
;;;
;;; The 'fold-services' procedure can be passed a list of procedures, which it
;;; "folds" by propagating extensions down the graph; it returns the root
;;; service after the applying all its extensions.
;;;
;;; Code:

(define-record-type <service-extension>
  (service-extension target compute)
  service-extension?
  (target  service-extension-target)              ;<service-type>
  (compute service-extension-compute))            ;params -> params

(define &no-default-value
  ;; Value used to denote service types that have no associated default value.
  '(no default value))

(define-record-type* <service-type> service-type make-service-type
  service-type?
  (name       service-type-name)                  ;symbol (for debugging)

  ;; Things extended by services of this type.
  (extensions service-type-extensions)            ;list of <service-extensions>

  ;; Given a list of extensions, "compose" them.
  (compose    service-type-compose                ;list of Any -> Any
              (default #f))

  ;; Extend the services' own parameters with the extension composition.
  (extend     service-type-extend                 ;list of Any -> parameters
              (default #f))

  ;; Optional default value for instances of this type.
  (default-value service-type-default-value       ;Any
                 (default &no-default-value))

  ;; Meta-data.
  (description  service-type-description)         ;string
  (location     service-type-location             ;<location>
                (default (and=> (current-source-location)
                                source-properties->location))
                (innate)))

(define (write-service-type type port)
  (format port "#<service-type ~a ~a>"
          (service-type-name type)
          (number->string (object-address type) 16)))

(set-record-type-printer! <service-type> write-service-type)

(define %distro-root-directory
  ;; Absolute file name of the module hierarchy.
  (dirname (search-path %load-path "guix.scm")))

(define %service-type-path
  ;; Search path for service types.
  (make-parameter `((,%distro-root-directory . "gnu/services")
                    (,%distro-root-directory . "gnu/system"))))

(define (all-service-modules)
  "Return the default set of service modules."
  (cons (resolve-interface '(gnu services))
        (all-modules (%service-type-path)
                     #:warn warn-about-load-error)))

(define* (fold-service-types proc seed
                             #:optional
                             (modules (all-service-modules)))
  "For each service type exported by one of MODULES, call (PROC RESULT).  SEED
is used as the initial value of RESULT."
  (fold-module-public-variables (lambda (object result)
                                  (if (service-type? object)
                                      (proc object result)
                                      result))
                                seed
                                modules))

(define lookup-service-types
  (let ((table
         (delay (fold-service-types (lambda (type result)
                                      (vhash-consq (service-type-name type)
                                                   type result))
                                    vlist-null))))
    (lambda (name)
      "Return the list of services with the given NAME (a symbol)."
      (vhash-foldq* cons '() name (force table)))))

;; Services of a given type.
(define-record-type <service>
  (make-service type value)
  service?
  (type       service-kind)
  (value      service-value))

(define-syntax service
  (syntax-rules ()
    "Return a service instance of TYPE.  The service value is VALUE or, if
omitted, TYPE's default value."
    ((_ type value)
     (make-service type value))
    ((_ type)
     (%service-with-default-value (current-source-location)
                                  type))))

(define (%service-with-default-value location type)
  "Return a instance of service type TYPE with its default value, if any.  If
TYPE does not have a default value, an error is raised."
  ;; TODO: Currently this is a run-time error but with a little bit macrology
  ;; we could turn it into an expansion-time error.
  (let ((default (service-type-default-value type)))
    (if (eq? default &no-default-value)
        (let ((location (source-properties->location location)))
          (raise
           (make-compound-condition
            (condition
             (&missing-value-service-error (type type) (location location)))
            (formatted-message (G_ "~a: no value specified \
for service of type '~a'")
                               (location->string location)
                               (service-type-name type)))))
        (service type default))))

(define-condition-type &service-error &error
  service-error?)

(define-condition-type &missing-value-service-error &service-error
  missing-value-service-error?
  (type     missing-value-service-error-type)
  (location missing-value-service-error-location))



;;;
;;; Helpers.
;;;

(define service-parameters
  ;; Deprecated alias.
  service-value)

(define (simple-service name target value)
  "Return a service that extends TARGET with VALUE.  This works by creating a
singleton service type NAME, of which the returned service is an instance."
  (let* ((extension (service-extension target identity))
         (type      (service-type (name name)
                                  (extensions (list extension))
                                  (description "This is a simple service."))))
    (service type value)))

(define-syntax clause-alist
  (syntax-rules (=> delete)
    "Build an alist of clauses.  Each element has the form (KIND PROC LOC)
where PROC is the service transformation procedure to apply for KIND, and LOC
is the source location information."
    ((_ (delete kind) rest ...)
     (cons (list kind
                 (lambda (service)
                   #f)
                 (current-source-location))
           (clause-alist rest ...)))
    ((_ (kind param => exp ...) rest ...)
     (cons (list kind
                 (lambda (svc)
                   (let ((param (service-value svc)))
                     (service (service-kind svc)
                              (begin exp ...))))
                 (current-source-location))
           (clause-alist rest ...)))
    ((_)
     '())))

(define (apply-clauses clauses service deleted-services)
  "Apply CLAUSES, an alist as returned by 'clause-alist', to SERVICE.  An
exception is raised if a clause attempts to modify a service
present in DELETED-SERVICES."
  (define (raise-if-deleted kind properties)
    (match (find (match-lambda
                   ((deleted-kind _)
                    (eq? kind deleted-kind)))
                 deleted-services)
      ((_ deleted-properties)
       (raise (make-compound-condition
               (condition
                (&error-location
                 (location (source-properties->location properties))))
               (formatted-message
                (G_ "modify-services: service '~a' was deleted here: ~a")
                (service-type-name kind)
                (source-properties->location deleted-properties)))))
      (_ #t)))

  (match clauses
    (((kind proc properties) . rest)
     (raise-if-deleted kind properties)
     (if (eq? (and service (service-kind service)) kind)
         (let ((new-service (proc service)))
           (apply-clauses rest new-service
                          (if new-service
                              deleted-services
                              (cons (list kind properties)
                                    deleted-services))))
         (apply-clauses rest service deleted-services)))
    (()
     service)))

(define (%modify-services services clauses)
  "Apply CLAUSES, an alist as returned by 'clause-alist', to SERVICES.  An
exception is raised if a clause attempts to modify a missing service."
  (define (raise-if-not-found clause)
    (match clause
      ((kind _ properties)
       (unless (find (lambda (service)
                       (eq? kind (service-kind service)))
                     services)
         (raise (make-compound-condition
                 (condition
                  (&error-location
                   (location (source-properties->location properties))))
                 (formatted-message
                  (G_ "modify-services: service '~a' not found in service list")
                  (service-type-name kind))))))))

  (for-each raise-if-not-found clauses)
  (reverse (filter-map identity
                       (fold (lambda (service services)
                               (cons (apply-clauses clauses service '())
                                     services))
                             '()
                             services))))

(define-syntax modify-services
  (syntax-rules ()
    "Modify the services listed in SERVICES according to CLAUSES and return
the resulting list of services.  Each clause must have the form:

  (TYPE VARIABLE => BODY)

where TYPE is a service type, such as 'guix-service-type', and VARIABLE is an
identifier that is bound within BODY to the value of the service of that
TYPE.

Clauses can also remove services of a given type:

  (delete TYPE)

Consider this example:

  (modify-services %base-services
    (guix-service-type config =>
                       (guix-configuration
                        (inherit config)
                        (use-substitutes? #f)
                        (extra-options '(\"--gc-keep-derivations\"))))
    (mingetty-service-type config =>
                           (mingetty-configuration
                            (inherit config)
                            (motd (plain-file \"motd\" \"Hi there!\"))))
    (delete udev-service-type))

It changes the configuration of the GUIX-SERVICE-TYPE instance, and that of
all the MINGETTY-SERVICE-TYPE instances, and it deletes instances of the
UDEV-SERVICE-TYPE."
    ((_ services clauses ...)
     (%modify-services services (clause-alist clauses ...)))))


;;;
;;; Core services.
;;;

(define (system-derivation entries mextensions)
  "Return as a monadic value the derivation of the 'system' directory
containing the given entries."
  (mlet %store-monad ((extensions (mapm/accumulate-builds identity
                                                          mextensions)))
    (lower-object
     (file-union "system"
                 (append entries (concatenate extensions))))))

(define system-service-type
  ;; This is the ultimate service type, the root of the service DAG.  The
  ;; service of this type is extended by monadic name/item pairs.  These items
  ;; end up in the "system directory" as returned by
  ;; 'operating-system-derivation'.
  (service-type (name 'system)
                (extensions '())
                (compose identity)
                (extend system-derivation)
                (description
                 "Build the operating system top-level directory, which in
turn refers to everything the operating system needs: its kernel, initrd,
system profile, boot script, and so on.")))

(define (compute-boot-script _ gexps)
  ;; Reverse GEXPS so that extensions appear in the boot script in the right
  ;; order.  That is, user extensions would come first, and extensions added
  ;; by 'essential-services' (e.g., running shepherd) are guaranteed to come
  ;; last.
  (gexp->file "boot"
              ;; Clean up and activate the system, then spawn shepherd.
              #~(begin #$@(reverse gexps))))

(define (boot-script-entry mboot)
  "Return, as a monadic value, an entry for the boot script in the system
directory."
  (mlet %store-monad ((boot mboot))
    (return `(("boot" ,boot)))))

(define boot-service-type
  ;; The service of this type is extended by being passed gexps.  It
  ;; aggregates them in a single script, as a monadic value, which becomes its
  ;; value.
  (service-type (name 'boot)
                (extensions
                 (list (service-extension system-service-type
                                          boot-script-entry)))
                (compose identity)
                (extend compute-boot-script)
                (default-value #f)
                (description
                 "Produce the operating system's boot script, which is spawned
by the initrd once the root file system is mounted.")))

(define %boot-service
  ;; The service that produces the boot script.
  (service boot-service-type #t))


;;;
;;; Provenance tracking.
;;;

(define (object->pretty-string obj)
  "Like 'object->string', but using 'pretty-print'."
  (call-with-output-string
    (lambda (port)
      (pretty-print obj port))))

(define (channel->code channel)
  "Return code to build CHANNEL, ready to be dropped in a 'channels.scm'
file."
  ;; Since the 'introduction' field is backward-incompatible, and since it's
  ;; optional when using the "official" 'guix channel, include it if and only
  ;; if we're referring to a different channel.
  (let ((intro (and (not (equal? (list channel) %default-channels))
                    (channel-introduction channel))))
    `(channel (name ',(channel-name channel))
              (url ,(channel-url channel))
              (branch ,(channel-branch channel))
              (commit ,(channel-commit channel))
              ,@(if intro
                    `((introduction
                       (make-channel-introduction
                        ,(channel-introduction-first-signed-commit intro)
                        (openpgp-fingerprint
                         ,(openpgp-format-fingerprint
                           (channel-introduction-first-commit-signer
                            intro))))))
                    '()))))

(define (channel->sexp channel)
  "Return an sexp describing CHANNEL.  The sexp is _not_ code and is meant to
be parsed by tools; it's potentially more future-proof than code."
  ;; TODO: Add CHANNEL's introduction.  Currently we can't do that because
  ;; older 'guix system describe' expect exactly name/url/branch/commit
  ;; without any additional fields.
  `(channel (name ,(channel-name channel))
            (url ,(channel-url channel))
            (branch ,(channel-branch channel))
            (commit ,(channel-commit channel))))

(define (sexp->channel sexp)
  "Return the channel corresponding to SEXP, an sexp as found in the
\"provenance\" file produced by 'provenance-service-type'."
  (match sexp
    (('channel ('name name)
               ('url url)
               ('branch branch)
               ('commit commit)
               rest ...)
     ;; XXX: In the future REST may include a channel introduction.
     (channel (name name) (url url)
              (branch branch) (commit commit)))))

(define (provenance-file channels config-file)
  "Return a 'provenance' file describing CHANNELS, a list of channels, and
CONFIG-FILE, which can be either #f or a <local-file> containing the OS
configuration being used."
  (scheme-file "provenance"
               #~(provenance
                  (version 0)
                  (channels #+@(if channels
                                   (map channel->sexp channels)
                                   '()))
                  (configuration-file #+config-file))))

(define (provenance-entry config-file)
  "Return system entries describing the operating system provenance: the
channels in use and CONFIG-FILE, if it is true."
  (define channels
    (current-channels))

  (mbegin %store-monad
    (let ((config-file (cond ((string? config-file)
                              ;; CONFIG-FILE has been passed typically via
                              ;; 'guix system reconfigure CONFIG-FILE' so we
                              ;; can assume it's valid: tell 'local-file' to
                              ;; not emit a warning.
                              (local-file (assume-valid-file-name config-file)
                                          "configuration.scm"))
                             ((not config-file)
                              #f)
                             (else
                              config-file))))
      (return `(("provenance" ,(provenance-file channels config-file))
                ,@(if channels
                      `(("channels.scm"
                         ,(plain-file "channels.scm"
                                      (object->pretty-string
                                       `(list
                                         ,@(map channel->code channels))))))
                      '())
                ,@(if config-file
                      `(("configuration.scm" ,config-file))
                      '()))))))

(define provenance-service-type
  (service-type (name 'provenance)
                (extensions
                 (list (service-extension system-service-type
                                          provenance-entry)))
                (default-value #f)                ;the OS config file
                (description
                 "Store provenance information about the system in the system
itself: the channels used when building the system, and its configuration
file, when available.")))

(define (sexp->system-provenance sexp)
  "Parse SEXP, an s-expression read from /run/current-system/provenance or
similar, and return two values: the list of channels listed therein, and the
OS configuration file or #f."
  (match sexp
    (('provenance ('version 0)
                  ('channels channels ...)
                  ('configuration-file config-file))
     (values (map sexp->channel channels)
             config-file))
    (_
     (values '() #f))))

(define (system-provenance system)
  "Given SYSTEM, the file name of a system generation, return two values: the
list of channels SYSTEM is built from, and its configuration file.  If that
information is missing, return the empty list (for channels) and possibly
#false (for the configuration file)."
  (catch 'system-error
    (lambda ()
      (sexp->system-provenance
       (call-with-input-file (string-append system "/provenance")
         read)))
    (lambda _
      (values '() #f))))

;;;
;;; Cleanup.
;;;

(define (cleanup-gexp _)
  "Return a gexp to clean up /tmp and similar places upon boot."
  (with-imported-modules '((guix build utils))
    #~(begin
        (use-modules (guix build utils))

        ;; Clean out /tmp and /var/run.
        ;;
        ;; XXX This needs to happen before service activations, so it
        ;; has to be here, but this also implicitly assumes that /tmp
        ;; and /var/run are on the root partition.
        (letrec-syntax ((fail-safe (syntax-rules ()
                                     ((_ exp rest ...)
                                      (begin
                                        (catch 'system-error
                                          (lambda () exp)
                                          (const #f))
                                        (fail-safe rest ...)))
                                     ((_)
                                      #t))))
          ;; Ignore I/O errors so the system can boot.
          (fail-safe
           ;; Remove stale Shadow lock files as they would lead to
           ;; failures of 'useradd' & co.
           (delete-file "/etc/group.lock")
           (delete-file "/etc/passwd.lock")
           (delete-file "/etc/.pwd.lock")         ;from 'lckpwdf'

           ;; Force file names to be decoded as UTF-8.  See
           ;; <https://bugs.gnu.org/26353>.
           (setenv "GUIX_LOCPATH"
                   #+(file-append
                      (libc-utf8-locales-for-target (%current-system))
                      "/lib/locale"))
           (setlocale LC_CTYPE "en_US.utf8")
           (delete-file-recursively "/tmp")
           (delete-file-recursively "/var/run")

           (mkdir "/tmp")
           (chmod "/tmp" #o1777)
           (mkdir "/var/run")
           (chmod "/var/run" #o755)
           (delete-file-recursively "/run/udev/watch.old"))))))

(define cleanup-service-type
  ;; Service that cleans things up in /tmp and similar.
  (service-type (name 'cleanup)
                (extensions
                 (list (service-extension boot-service-type
                                          cleanup-gexp)))
                (description
                 "Delete files from @file{/tmp}, @file{/var/run}, and other
temporary locations at boot time.")))

(define* (activation-service->script service)
  "Return as a monadic value the activation script for SERVICE, a service of
ACTIVATION-SCRIPT-TYPE."
  (activation-script (service-value service)))

(define (activation-script gexps)
  "Return the system's activation script, which evaluates GEXPS."
  (define actions
    (map (cut program-file "activate-service.scm" <>) gexps))

  (program-file "activate.scm"
                (with-imported-modules (source-module-closure
                                        '((gnu build activation)
                                          (guix build utils)))
                  #~(begin
                      (use-modules (gnu build activation)
                                   (guix build utils))

                      (mkdir-p "/var/run")
                      ;; Make sure the user accounting database exists.  If it
                      ;; does not exist, 'setutxent' does not create it and
                      ;; thus there is no accounting at all.
                      (close-port (open-file "/var/run/utmpx" "a0"))

                      ;; Same for 'wtmp', which is populated by mingetty et
                      ;; al.
                      (mkdir-p "/var/log")
                      (close-port (open-file "/var/log/wtmp" "a0"))

                      ;; Set up /run/current-system.  Among other things this
                      ;; sets up locales, which the activation snippets
                      ;; executed below may expect.
                      (activate-current-system)

                      ;; Run the services' activation snippets.
                      ;; TODO: Use 'load-compiled'.
                      (for-each primitive-load '#$actions)))))

(define (gexps->activation-gexp gexps)
  "Return a gexp that runs the activation script containing GEXPS."
  #~(primitive-load #$(activation-script gexps)))

(define (activation-profile-entry gexps)
  "Return, as a monadic value, an entry for the activation script in the
system directory."
  (mlet %store-monad ((activate (lower-object (activation-script gexps))))
    (return `(("activate" ,activate)))))

(define (second-argument a b) b)

(define activation-service-type
  (service-type (name 'activate)
                (extensions
                 (list (service-extension boot-service-type
                                          gexps->activation-gexp)
                       (service-extension system-service-type
                                          activation-profile-entry)))
                (compose identity)
                (extend second-argument)
                (default-value #f)
                (description
                 "Run @dfn{activation} code at boot time and upon
@command{guix system reconfigure} completion.")))

(define %activation-service
  ;; The activation service produces the activation script from the gexps it
  ;; receives.
  (service activation-service-type #t))

(define %modprobe-wrapper
  ;; Wrapper for the 'modprobe' command that knows where modules live.
  ;;
  ;; This wrapper is typically invoked by the Linux kernel ('call_modprobe',
  ;; in kernel/kmod.c), a situation where the 'LINUX_MODULE_DIRECTORY'
  ;; environment variable is not set---hence the need for this wrapper.
  (let ((modprobe "/run/current-system/profile/bin/modprobe"))
    (program-file "modprobe"
                  #~(begin
                      (setenv "LINUX_MODULE_DIRECTORY"
                              "/run/booted-system/kernel/lib/modules")
                      ;; FIXME: Remove this crutch when the patch #40422,
                      ;; updating to kmod 27 is merged.
                      (setenv "MODPROBE_OPTIONS"
                              "-C /etc/modprobe.d")
                      (apply execl #$modprobe
                             (cons #$modprobe (cdr (command-line))))))))

(define %linux-kernel-activation
  ;; Activation of the Linux kernel running on the bare metal (as opposed to
  ;; running in a container.)
  #~(begin
      ;; Tell the kernel to use our 'modprobe' command.
      (activate-modprobe #$%modprobe-wrapper)

      ;; Let users debug their own processes!
      (activate-ptrace-attach)))

(define %linux-bare-metal-service
  ;; The service that does things that are needed on the "bare metal", but not
  ;; necessary or impossible in a container.
  (simple-service 'linux-bare-metal
                  activation-service-type
                  %linux-kernel-activation))

(define %hurd-rc-script
  ;; The RC script to be started upon boot.
  (program-file "rc"
                (with-imported-modules (source-module-closure
                                        '((guix build utils)
                                          (gnu build hurd-boot)
                                          (guix build syscalls)))
                  #~(begin
                      (use-modules (guix build utils)
                                   (gnu build hurd-boot)
                                   (guix build syscalls)
                                   (ice-9 match)
                                   (system repl repl)
                                   (srfi srfi-1)
                                   (srfi srfi-26))
                      (boot-hurd-system)))))

(define (hurd-rc-entry rc)
  "Return, as a monadic value, an entry for the RC script in the system
directory."
  (mlet %store-monad ((rc (lower-object rc)))
    (return `(("rc" ,rc)))))

(define hurd-startup-service-type
  ;; The service that creates the initial SYSTEM/rc startup file.
  (service-type (name 'startup)
                (extensions
                 (list (service-extension system-service-type hurd-rc-entry)))
                (default-value %hurd-rc-script)
                (description "This service creates an @file{rc} script in the
system; that script is responsible for booting the Hurd.")))

(define %hurd-startup-service
  ;; The service that produces the RC script.
  (service hurd-startup-service-type %hurd-rc-script))

(define special-files-service-type
  ;; Service to install "special files" such as /bin/sh and /usr/bin/env.
  (service-type
   (name 'special-files)
   (extensions
    (list (service-extension activation-service-type
                             (lambda (files)
                               #~(activate-special-files '#$files)))))
   (compose concatenate)
   (extend append)
   (description
    "Add special files to the root file system---e.g.,
@file{/usr/bin/env}.")))

(define (extra-special-file file target)
  "Use TARGET as the \"special file\" FILE.  For example, TARGET might be
  (file-append coreutils \"/bin/env\")
and FILE could be \"/usr/bin/env\"."
  (simple-service (string->symbol (string-append "special-file-" file))
                  special-files-service-type
                  `((,file ,target))))

(define (etc-directory service)
  "Return the directory for SERVICE, a service of type ETC-SERVICE-TYPE."
  (files->etc-directory (service-value service)))

(define (files->etc-directory files)
  (define (assert-no-duplicates files)
    (let loop ((files files)
               (seen (set)))
      (match files
        (() #t)
        (((file _) rest ...)
         (when (set-contains? seen file)
           (raise (formatted-message (G_ "duplicate '~a' entry for /etc")
                                     file)))
         (loop rest (set-insert file seen))))))

  ;; Detect duplicates early instead of letting them through, eventually
  ;; leading to a build failure of "etc.drv".
  (assert-no-duplicates files)

  (file-union "etc" files))

(define (etc-entry files)
  "Return an entry for the /etc directory consisting of FILES in the system
directory."
  (with-monad %store-monad
    (return `(("etc" ,(files->etc-directory files))))))

(define etc-service-type
  (service-type (name 'etc)
                (extensions
                 (list
                  (service-extension activation-service-type
                                     (lambda (files)
                                       (let ((etc
                                              (files->etc-directory files)))
                                         #~(activate-etc #$etc))))
                  (service-extension system-service-type etc-entry)))
                (compose concatenate)
                (extend append)
                (default-value '())
                (description "Populate the @file{/etc} directory.")))

(define-deprecated (etc-service files)
  etc-service-type
  "Return a new service of ETC-SERVICE-TYPE that populates /etc with FILES.
FILES must be a list of name/file-like object pairs."
  (service etc-service-type files))

(define (setuid-program->activation-gexp programs)
  "Return an activation gexp for setuid-program from PROGRAMS."
  (let ((programs (map (lambda (program)
                         ;; FIXME This is really ugly, I didn't managed to use
                         ;; "inherit"
                         (let ((program-name (setuid-program-program program))
                               (setuid?      (setuid-program-setuid? program))
                               (setgid?      (setuid-program-setgid? program))
                               (user         (setuid-program-user program))
                               (group        (setuid-program-group program)) )
                           #~(setuid-program
                              (setuid? #$setuid?)
                              (setgid? #$setgid?)
                              (user    #$user)
                              (group   #$group)
                              (program #$program-name))))
                       programs)))
    (with-imported-modules (source-module-closure
                            '((gnu system setuid)))
      #~(begin
          (use-modules (gnu system setuid))

          (activate-setuid-programs (list #$@programs))))))

(define setuid-program-service-type
  (service-type (name 'setuid-program)
                (extensions
                 (list (service-extension activation-service-type
                                          setuid-program->activation-gexp)))
                (compose concatenate)
                (extend (lambda (config extensions)
                          (append config extensions)))
                (description
                 "Populate @file{/run/setuid-programs} with the specified
executables, making them setuid and/or setgid.")))

(define (packages->profile-entry packages)
  "Return a system entry for the profile containing PACKAGES."
  ;; XXX: 'mlet' is needed here for one reason: to get the proper
  ;; '%current-target' and '%current-target-system' bindings when
  ;; 'packages->manifest' is called, and thus when the 'package-inputs'
  ;; etc. procedures are called on PACKAGES.  That way, conditionals in those
  ;; inputs see the "correct" value of these two parameters.  See
  ;; <https://issues.guix.gnu.org/44952>.
  (mlet %store-monad ((_ (current-target-system)))
    (return `(("profile" ,(profile
                           (content (packages->manifest
                                     (delete-duplicates packages eq?)))))))))

(define profile-service-type
  ;; The service that populates the system's profile---i.e.,
  ;; /run/current-system/profile.  It is extended by package lists.
  (service-type (name 'profile)
                (extensions
                 (list (service-extension system-service-type
                                          packages->profile-entry)))
                (compose concatenate)
                (extend append)
                (default-value '())
                (description
                 "This is the @dfn{system profile}, available as
@file{/run/current-system/profile}.  It contains packages that the sysadmin
wants to be globally available to all the system users.")))

(define (firmware->activation-gexp firmware)
  "Return a gexp to make the packages listed in FIRMWARE loadable by the
kernel."
  (let ((directory (directory-union "firmware" firmware)))
    ;; Tell the kernel where firmware is.
    #~(activate-firmware (string-append #$directory "/lib/firmware"))))

(define firmware-service-type
  ;; The service that collects firmware.
  (service-type (name 'firmware)
                (extensions
                 (list (service-extension activation-service-type
                                          firmware->activation-gexp)))
                (compose concatenate)
                (extend append)
                (description
                 "Make ``firmware'' files loadable by the operating system
kernel.  Firmware may then be uploaded to some of the machine's devices, such
as Wifi cards.")))

(define (gc-roots->system-entry roots)
  "Return an entry in the system's output containing symlinks to ROOTS."
  (mlet %store-monad ((entry (gexp->derivation
                              "gc-roots"
                              #~(let ((roots '#$roots))
                                  (mkdir #$output)
                                  (chdir #$output)
                                  (for-each symlink
                                            roots
                                            (map number->string
                                                 (iota (length roots))))))))
    (return (if (null? roots)
                '()
                `(("gc-roots" ,entry))))))

(define gc-root-service-type
  ;; A service to associate extra garbage-collector roots to the system.  This
  ;; is a simple hack that guarantees that the system retains references to
  ;; the given list of roots.  Roots must be "lowerable" objects like
  ;; packages, or derivations.
  (service-type (name 'gc-roots)
                (extensions
                 (list (service-extension system-service-type
                                          gc-roots->system-entry)))
                (compose concatenate)
                (extend append)
                (description
                 "Register garbage-collector roots---i.e., store items that
will not be reclaimed by the garbage collector.")
                (default-value '())))

;; Configuration for the Linux kernel builder.
(define-record-type* <linux-builder-configuration>
  linux-builder-configuration
  make-linux-builder-configuration
  linux-builder-configuration?
  this-linux-builder-configuration

  (kernel   linux-builder-configuration-kernel)                   ; package
  (modules  linux-builder-configuration-modules  (default '())))  ; list of packages

(define (package-for-kernel target-kernel module-package)
  "Return a package like MODULE-PACKAGE, adapted for TARGET-KERNEL, if
possible (that is if there's a LINUX keyword argument in the build system)."
  (package
    (inherit module-package)
    (arguments
     (substitute-keyword-arguments (package-arguments module-package)
       ((#:linux kernel #f)
        target-kernel)))))

(define (linux-builder-configuration->system-entry config)
  "Return the kernel entry of the 'system' directory."
  (let* ((kernel  (linux-builder-configuration-kernel config))
         (modules (linux-builder-configuration-modules config))
         (kernel  (profile
                    (content (packages->manifest
                              (cons kernel
                                    (map (lambda (module)
                                           (cond
                                             ((package? module)
                                              (package-for-kernel kernel module))
                                             ;; support (,package "kernel-module-output")
                                             ((and (list? module) (package? (car module)))
                                              (cons (package-for-kernel kernel
                                                                        (car module))
                                                    (cdr module)))
                                             (else
                                              module)))
                                         modules))))
                    (hooks (list linux-module-database)))))
    (with-monad %store-monad
      (return `(("kernel" ,kernel))))))

(define linux-builder-service-type
  (service-type (name 'linux-builder)
                (extensions
                  (list (service-extension system-service-type
                                           linux-builder-configuration->system-entry)))
                (default-value '())
                (compose identity)
                (extend (lambda (config modifiers)
                          (if (null? modifiers)
                              config
                              ((apply compose modifiers) config))))
                (description "Builds the linux-libre kernel profile, containing
the kernel itself and any linux-loadable kernel modules.  This can be extended
with a function that accepts the current configuration and returns a new
configuration.")))

(define (linux-loadable-module-builder-modifier modules)
  "Extends linux-builder-service-type by appending the given MODULES to the
configuration of linux-builder-service-type."
  (lambda (config)
    (linux-builder-configuration
      (inherit config)
      (modules (append (linux-builder-configuration-modules config)
                       modules)))))

(define linux-loadable-module-service-type
  (service-type (name 'linux-loadable-modules)
                (extensions
                  (list (service-extension linux-builder-service-type
                                           linux-loadable-module-builder-modifier)))
                (default-value '())
                (compose concatenate)
                (extend append)
                (description "Adds packages and package outputs as modules
included in the booted linux-libre profile.  Other services can extend this
service type to add particular modules to the set of linux-loadable modules.")))



;;;
;;; Service folding.
;;;

(define-condition-type &missing-target-service-error &service-error
  missing-target-service-error?
  (service      missing-target-service-error-service)
  (target-type  missing-target-service-error-target-type))

(define-condition-type &ambiguous-target-service-error &service-error
  ambiguous-target-service-error?
  (service      ambiguous-target-service-error-service)
  (target-type  ambiguous-target-service-error-target-type))

(define (missing-target-error service target-type)
  (raise
   (condition (&missing-target-service-error
               (service service)
               (target-type target-type))
              (&message
               (message
                (format #f (G_ "no target of type '~a' for service '~a'")
                        (service-type-name target-type)
                        (service-type-name
                         (service-kind service))))))))

(define (service-back-edges services)
  "Return a procedure that, when passed a <service>, returns the list of
<service> objects that depend on it."
  (define (add-edges service edges)
    (define (add-edge extension edges)
      (let ((target-type (service-extension-target extension)))
        (match (filter (lambda (service)
                         (eq? (service-kind service) target-type))
                       services)
          ((target)
           (vhash-consq target service edges))
          (()
           (missing-target-error service target-type))
          (x
           (raise
            (condition (&ambiguous-target-service-error
                        (service service)
                        (target-type target-type))
                       (&message
                        (message
                         (format #f
                                 (G_ "more than one target service of type '~a'")
                                 (service-type-name target-type))))))))))

    (fold add-edge edges (service-type-extensions (service-kind service))))

  (let ((edges (fold add-edges vlist-null services)))
    (lambda (node)
      (reverse (vhash-foldq* cons '() node edges)))))

(define (instantiate-missing-services services)
  "Return SERVICES, a list, augmented with any services targeted by extensions
and missing from SERVICES.  Only service types with a default value can be
instantiated; other missing services lead to a
'&missing-target-service-error'."
  (define (adjust-service-list svc result instances)
    (fold2 (lambda (extension result instances)
             (define target-type
               (service-extension-target extension))

             (match (vhash-assq target-type instances)
               (#f
                (let ((default (service-type-default-value target-type)))
                  (if (eq? &no-default-value default)
                      (missing-target-error svc target-type)
                      (let ((new (service target-type)))
                        (values (cons new result)
                                (vhash-consq target-type new instances))))))
               (_
                (values result instances))))
           result
           instances
           (service-type-extensions (service-kind svc))))

  (let loop ((services services))
    (define instances
      (fold (lambda (service result)
              (vhash-consq (service-kind service) service
                           result))
            vlist-null services))

    (define adjusted
      (fold2 adjust-service-list
             services instances
             services))

    ;; If we instantiated services, they might in turn depend on missing
    ;; services.  Loop until we've reached fixed point.
    (if (= (length adjusted) (vlist-length instances))
        adjusted
        (loop adjusted))))

(define* (fold-services services
                        #:key (target-type system-service-type))
  "Fold SERVICES by propagating their extensions down to the root of type
TARGET-TYPE; return the root service adjusted accordingly."
  (define dependents
    (service-back-edges services))

  (define (matching-extension target)
    (let ((target (service-kind target)))
      (match-lambda
        (($ <service-extension> type)
         (eq? type target)))))

  (define (apply-extension target)
    (lambda (service)
      (match (find (matching-extension target)
                   (service-type-extensions (service-kind service)))
        (($ <service-extension> _ compute)
         (compute (service-value service))))))

  (match (filter (lambda (service)
                   (eq? (service-kind service) target-type))
                 services)
    ((sink)
     ;; Use the state monad to keep track of already-visited services in the
     ;; graph and to memoize their value once folded.
     (run-with-state
         (let loop ((sink sink))
           (mlet %state-monad ((visited (current-state)))
             (match (vhash-assq sink visited)
               (#f
                (mlet* %state-monad
                    ((dependents (mapm %state-monad loop (dependents sink)))
                     (visited    (current-state))
                     (extensions -> (map (apply-extension sink) dependents))
                     (extend     -> (service-type-extend (service-kind sink)))
                     (compose    -> (service-type-compose (service-kind sink)))
                     (params     -> (service-value sink))
                     (service
                      ->
                      ;; Distinguish COMPOSE and EXTEND because PARAMS typically
                      ;; has a different type than the elements of EXTENSIONS.
                      (if extend
                          (service (service-kind sink)
                                   (extend params (compose extensions)))
                          sink)))
                  (mbegin %state-monad
                    (set-current-state (vhash-consq sink service visited))
                    (return service))))
               ((_ . service)                     ;SINK was already visited
                (return service)))))
       vlist-null))
    (()
     (raise
      (make-compound-condition
       (condition (&missing-target-service-error
                   (service #f)
                   (target-type target-type)))
       (formatted-message (G_ "service of type '~a' not found")
                          (service-type-name target-type)))))
    (x
     (raise
      (condition (&ambiguous-target-service-error
                  (service #f)
                  (target-type target-type))
                 (&message
                  (message
                   (format #f
                           (G_ "more than one target service of type '~a'")
                           (service-type-name target-type)))))))))

(define (remove-service-extensions type lst)
  "Return TYPE, a service type, without any of the service extensions
targeting one of the types in LST."
  (service-type
   (inherit type)
   (extensions (remove (lambda (extension)
                         (memq (service-extension-target extension) lst))
                       (service-type-extensions type)))))

(define-syntax-parameter for-home?
  ;; Whether the configuration being defined is for a Home service.
  (identifier-syntax #f))

(define-syntax-rule (for-home exp ...)
  "Mark EXP, which typically defines a service configuration, as targeting a
Home service rather than a System service."
  (syntax-parameterize ((for-home? (identifier-syntax #t)))
    exp ...))

(define-with-syntax-properties (validate-service-list (value properties))
  (%validate-service-list value properties))

(define (%validate-service-list value properties)
  (match value
    (((? service?) ...) value)
    (_
     (raise
      (make-compound-condition
       (condition
        (&error-location
         (location (source-properties->location properties))))
       (formatted-message
        (G_ "'services' field must contain a list of services")))))))

;;; services.scm ends here.


context:
space:
mode: