all messages for Guix-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob d1ccf36f274efd5e5aab1032051eabb561aeb7c1 68383 bytes (raw)
name: guix/store.scm 	 # note: path name is non-authoritative(*)

   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
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
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (guix store)
  #:use-module (guix store files)
  #:use-module (guix utils)
  #:use-module (guix config)
  #:use-module (guix deprecation)
  #:use-module (guix memoization)
  #:use-module (guix serialization)
  #:use-module (guix monads)
  #:use-module (guix records)
  #:use-module (guix base16)
  #:use-module (guix base32)
  #:use-module (gcrypt hash)
  #:use-module (guix profiling)
  #:autoload   (guix build syscalls) (terminal-columns)
  #:use-module (rnrs bytevectors)
  #:use-module (ice-9 binary-ports)
  #:use-module ((ice-9 control) #:select (let/ec))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-9)
  #:use-module (srfi srfi-9 gnu)
  #:use-module (srfi srfi-11)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (srfi srfi-39)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:use-module (ice-9 vlist)
  #:use-module (ice-9 popen)
  #:use-module (ice-9 threads)
  #:use-module (ice-9 format)
  #:use-module (web uri)
  #:export (%daemon-socket-uri
            %gc-roots-directory
            %default-substitute-urls

            store-connection?
            store-connection-version
            store-connection-major-version
            store-connection-minor-version
            store-connection-socket

            ;; Deprecated forms for 'store-connection'.
            nix-server?
            nix-server-version
            nix-server-major-version
            nix-server-minor-version
            nix-server-socket

            current-store-protocol-version        ;for internal use
            mcached

            &store-error store-error?
            &store-connection-error store-connection-error?
            store-connection-error-file
            store-connection-error-code
            &store-protocol-error store-protocol-error?
            store-protocol-error-message
            store-protocol-error-status

            ;; Deprecated forms for '&store-error' et al.
            &nix-error nix-error?
            &nix-connection-error nix-connection-error?
            nix-connection-error-file
            nix-connection-error-code
            &nix-protocol-error nix-protocol-error?
            nix-protocol-error-message
            nix-protocol-error-status

            hash-algo
            build-mode

            open-connection
            port->connection
            close-connection
            with-store
            set-build-options
            set-build-options*
            valid-path?
            query-path-hash
            hash-part->path
            query-path-info
            add-data-to-store
            add-text-to-store
            add-to-store
            add-file-tree-to-store
            binary-file
            build-things
            build
            query-failed-paths
            clear-failed-paths
            add-temp-root
            add-indirect-root
            add-permanent-root
            remove-permanent-root

            substitutable?
            substitutable-path
            substitutable-deriver
            substitutable-references
            substitutable-download-size
            substitutable-nar-size
            has-substitutes?
            substitutable-paths
            substitutable-path-info

            path-info?
            path-info-deriver
            path-info-hash
            path-info-references
            path-info-registration-time
            path-info-nar-size

            built-in-builders
            references
            references/substitutes
            references*
            query-path-info*
            requisites
            referrers
            optimize-store
            verify-store
            topologically-sorted
            valid-derivers
            query-derivation-outputs
            live-paths
            dead-paths
            collect-garbage
            delete-paths
            import-paths
            export-paths

            current-build-output-port

            %store-monad
            store-bind
            store-return
            store-lift
            store-lower
            run-with-store
            %guile-for-build
            current-system
            set-current-system
            text-file
            interned-file
            interned-file-tree

            log-file)
  #:re-export (%store-prefix
               store-path
               output-path
               fixed-output-path
               store-path?
               direct-store-path?
               derivation-path?
               store-path-package-name
               store-path-hash-part
               direct-store-path
               derivation-log-file))

(define %protocol-version #x163)

(define %worker-magic-1 #x6e697863)               ; "nixc"
(define %worker-magic-2 #x6478696f)               ; "dxio"

(define (protocol-major magic)
  (logand magic #xff00))
(define (protocol-minor magic)
  (logand magic #x00ff))
(define (protocol-version major minor)
  (logior major minor))

(define-syntax define-enumerate-type
  (syntax-rules ()
    ((_ name->int (name id) ...)
     (define-syntax name->int
       (syntax-rules (name ...)
         ((_) '(name ...))
         ((_ name) id) ...)))))

(define-enumerate-type operation-id
  ;; operation numbers from worker-protocol.hh
  (quit 0)
  (valid-path? 1)
  (has-substitutes? 3)
  (query-path-hash 4)
  (query-references 5)
  (query-referrers 6)
  (add-to-store 7)
  (add-text-to-store 8)
  (build-things 9)
  (ensure-path 10)
  (add-temp-root 11)
  (add-indirect-root 12)
  (sync-with-gc 13)
  (find-roots 14)
  (export-path 16)
  (query-deriver 18)
  (set-options 19)
  (collect-garbage 20)
  ;;(query-substitutable-path-info 21)  ; obsolete as of #x10c
  (query-derivation-outputs 22)
  (query-all-valid-paths 23)
  (query-failed-paths 24)
  (clear-failed-paths 25)
  (query-path-info 26)
  (import-paths 27)
  (query-derivation-output-names 28)
  (query-path-from-hash-part 29)
  (query-substitutable-path-infos 30)
  (query-valid-paths 31)
  (query-substitutable-paths 32)
  (query-valid-derivers 33)
  (optimize-store 34)
  (verify-store 35)
  (built-in-builders 80))

(define-enumerate-type hash-algo
  ;; hash.hh
  (md5 1)
  (sha1 2)
  (sha256 3))

(define-enumerate-type build-mode
  ;; store-api.hh
  (normal 0)
  (repair 1)
  (check 2))

(define-enumerate-type gc-action
  ;; store-api.hh
  (return-live 0)
  (return-dead 1)
  (delete-dead 2)
  (delete-specific 3))

(define %default-socket-path
  (string-append %state-directory "/daemon-socket/socket"))

(define %daemon-socket-uri
  ;; URI or file name of the socket the daemon listens too.
  (make-parameter (or (getenv "GUIX_DAEMON_SOCKET")
                      %default-socket-path)))


\f
;; Information about a substitutable store path.
(define-record-type <substitutable>
  (substitutable path deriver refs dl-size nar-size)
  substitutable?
  (path      substitutable-path)
  (deriver   substitutable-deriver)
  (refs      substitutable-references)
  (dl-size   substitutable-download-size)
  (nar-size  substitutable-nar-size))

(define (read-substitutable-path-list p)
  (let loop ((len    (read-int p))
             (result '()))
    (if (zero? len)
        (reverse result)
        (let ((path     (read-store-path p))
              (deriver  (read-store-path p))
              (refs     (read-store-path-list p))
              (dl-size  (read-long-long p))
              (nar-size (read-long-long p)))
          (loop (- len 1)
                (cons (substitutable path deriver refs dl-size nar-size)
                      result))))))

;; Information about a store path.
(define-record-type <path-info>
  (path-info deriver hash references registration-time nar-size)
  path-info?
  (deriver path-info-deriver)                     ;string | #f
  (hash path-info-hash)
  (references path-info-references)
  (registration-time path-info-registration-time)
  (nar-size path-info-nar-size))

(define (read-path-info p)
  (let ((deriver  (match (read-store-path p)
                    ("" #f)
                    (x  x)))
        (hash     (base16-string->bytevector (read-string p)))
        (refs     (read-store-path-list p))
        (registration-time (read-int p))
        (nar-size (read-long-long p)))
    (path-info deriver hash refs registration-time nar-size)))

(define-syntax write-arg
  (syntax-rules (integer boolean bytevector
                 string string-list string-pairs
                 store-path store-path-list base16)
    ((_ integer arg p)
     (write-int arg p))
    ((_ boolean arg p)
     (write-int (if arg 1 0) p))
    ((_ bytevector arg p)
     (write-bytevector arg p))
    ((_ string arg p)
     (write-string arg p))
    ((_ string-list arg p)
     (write-string-list arg p))
    ((_ string-pairs arg p)
     (write-string-pairs arg p))
    ((_ store-path arg p)
     (write-store-path arg p))
    ((_ store-path-list arg p)
     (write-store-path-list arg p))
    ((_ base16 arg p)
     (write-string (bytevector->base16-string arg) p))))

(define-syntax read-arg
  (syntax-rules (integer boolean string store-path store-path-list string-list
                 substitutable-path-list path-info base16)
    ((_ integer p)
     (read-int p))
    ((_ boolean p)
     (not (zero? (read-int p))))
    ((_ string p)
     (read-string p))
    ((_ store-path p)
     (read-store-path p))
    ((_ store-path-list p)
     (read-store-path-list p))
    ((_ string-list p)
     (read-string-list p))
    ((_ substitutable-path-list p)
     (read-substitutable-path-list p))
    ((_ path-info p)
     (read-path-info p))
    ((_ base16 p)
     (base16-string->bytevector (read-string p)))))

\f
;; remote-store.cc

(define-record-type* <store-connection> store-connection %make-store-connection
  store-connection?
  (socket store-connection-socket)
  (major  store-connection-major-version)
  (minor  store-connection-minor-version)

  (buffer store-connection-output-port)                 ;output port
  (flush  store-connection-flush-output)                ;thunk

  ;; Caches.  We keep them per-connection, because store paths build
  ;; during the session are temporary GC roots kept for the duration of
  ;; the session.
  (ats-cache    store-connection-add-to-store-cache)
  (atts-cache   store-connection-add-text-to-store-cache)
  (object-cache store-connection-object-cache
                (default vlist-null)))            ;vhash

(set-record-type-printer! <store-connection>
                          (lambda (obj port)
                            (format port "#<store-connection ~a.~a ~a>"
                                    (store-connection-major-version obj)
                                    (store-connection-minor-version obj)
                                    (number->string (object-address obj)
                                                    16))))

(define-deprecated/alias nix-server? store-connection?)
(define-deprecated/alias nix-server-major-version
  store-connection-major-version)
(define-deprecated/alias nix-server-minor-version
  store-connection-minor-version)
(define-deprecated/alias nix-server-socket store-connection-socket)


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

(define-condition-type &store-connection-error &store-error
  store-connection-error?
  (file   store-connection-error-file)
  (errno  store-connection-error-code))

(define-condition-type &store-protocol-error &store-error
  store-protocol-error?
  (message store-protocol-error-message)
  (status  store-protocol-error-status))

(define-deprecated/alias &nix-error &store-error)
(define-deprecated/alias nix-error? store-error?)
(define-deprecated/alias &nix-connection-error &store-connection-error)
(define-deprecated/alias nix-connection-error? store-connection-error?)
(define-deprecated/alias nix-connection-error-file
  store-connection-error-file)
(define-deprecated/alias nix-connection-error-code
  store-connection-error-code)
(define-deprecated/alias &nix-protocol-error &store-protocol-error)
(define-deprecated/alias nix-protocol-error? store-protocol-error?)
(define-deprecated/alias nix-protocol-error-message
  store-protocol-error-message)
(define-deprecated/alias nix-protocol-error-status
  store-protocol-error-status)


(define-syntax-rule (system-error-to-connection-error file exp ...)
  "Catch 'system-error' exceptions and translate them to
'&store-connection-error'."
  (catch 'system-error
    (lambda ()
      exp ...)
    (lambda args
      (let ((errno (system-error-errno args)))
        (raise (condition (&store-connection-error
                           (file file)
                           (errno errno))))))))

(define (open-unix-domain-socket file)
  "Connect to the Unix-domain socket at FILE and return it.  Raise a
'&store-connection-error' upon error."
  (let ((s (with-fluids ((%default-port-encoding #f))
             ;; This trick allows use of the `scm_c_read' optimization.
             (socket PF_UNIX SOCK_STREAM 0)))
        (a (make-socket-address PF_UNIX file)))

    (system-error-to-connection-error file
      (connect s a)
      s)))

(define %default-guix-port
  ;; Default port when connecting to a daemon over TCP/IP.
  44146)

(define (open-inet-socket host port)
  "Connect to the Unix-domain socket at HOST:PORT and return it.  Raise a
'&store-connection-error' upon error."
  (let ((sock (with-fluids ((%default-port-encoding #f))
                ;; This trick allows use of the `scm_c_read' optimization.
                (socket PF_UNIX SOCK_STREAM 0))))
    (define addresses
      (getaddrinfo host
                   (if (number? port) (number->string port) port)
                   (if (number? port)
                       (logior AI_ADDRCONFIG AI_NUMERICSERV)
                       AI_ADDRCONFIG)
                   0                              ;any address family
                   SOCK_STREAM))                  ;TCP only

    (let loop ((addresses addresses))
      (match addresses
        ((ai rest ...)
         (let ((s (socket (addrinfo:fam ai)
                          ;; TCP/IP only
                          SOCK_STREAM IPPROTO_IP)))

           (catch 'system-error
             (lambda ()
               (connect s (addrinfo:addr ai))

               ;; Setting this option makes a dramatic difference because it
               ;; avoids the "ACK delay" on our RPC messages.
               (setsockopt s IPPROTO_TCP TCP_NODELAY 1)
               s)
             (lambda args
               ;; Connection failed, so try one of the other addresses.
               (close s)
               (if (null? rest)
                   (raise (condition (&store-connection-error
                                      (file host)
                                      (errno (system-error-errno args)))))
                   (loop rest))))))))))

(define (connect-to-daemon uri)
  "Connect to the daemon at URI, a string that may be an actual URI or a file
name."
  (define (not-supported)
    (raise (condition (&store-connection-error
                       (file uri)
                       (errno ENOTSUP)))))

  (define connect
    (match (string->uri uri)
      (#f                                         ;URI is a file name
       open-unix-domain-socket)
      ((? uri? uri)
       (match (uri-scheme uri)
         ((or #f 'file 'unix)
          (lambda (_)
            (open-unix-domain-socket (uri-path uri))))
         ('guix
          (lambda (_)
            (open-inet-socket (uri-host uri)
                              (or (uri-port uri) %default-guix-port))))
         ((? symbol? scheme)
          ;; Try to dynamically load a module for SCHEME.
          ;; XXX: Errors are swallowed.
          (match (false-if-exception
                  (resolve-interface `(guix store ,scheme)))
            ((? module? module)
             (match (false-if-exception
                     (module-ref module 'connect-to-daemon))
               ((? procedure? connect)
                (lambda (_)
                  (connect uri)))
               (x (not-supported))))
            (#f (not-supported))))
         (x
          (not-supported))))))

  (connect uri))

(define* (open-connection #:optional (uri (%daemon-socket-uri))
                          #:key port (reserve-space? #t) cpu-affinity)
  "Connect to the daemon at URI (a string), or, if PORT is not #f, use it as
the I/O port over which to communicate to a build daemon.

When RESERVE-SPACE? is true, instruct it to reserve a little bit of extra
space on the file system so that the garbage collector can still operate,
should the disk become full.  When CPU-AFFINITY is true, it must be an integer
corresponding to an OS-level CPU number to which the daemon's worker process
for this connection will be pinned.  Return a server object."
  (guard (c ((nar-error? c)
             ;; One of the 'write-' or 'read-' calls below failed, but this is
             ;; really a connection error.
             (raise (condition
                     (&store-connection-error (file (or port uri))
                                              (errno EPROTO))
                     (&message (message "build daemon handshake failed"))))))
    (let*-values (((port)
                   (or port (connect-to-daemon uri)))
                  ((output flush)
                   (buffering-output-port port
                                          (make-bytevector 8192))))
      (write-int %worker-magic-1 port)
      (let ((r (read-int port)))
        (and (eqv? r %worker-magic-2)
             (let ((v (read-int port)))
               (and (eqv? (protocol-major %protocol-version)
                          (protocol-major v))
                    (begin
                      (write-int %protocol-version port)
                      (when (>= (protocol-minor v) 14)
                        (write-int (if cpu-affinity 1 0) port)
                        (when cpu-affinity
                          (write-int cpu-affinity port)))
                      (when (>= (protocol-minor v) 11)
                        (write-int (if reserve-space? 1 0) port))
                      (let ((conn (%make-store-connection port
                                                          (protocol-major v)
                                                          (protocol-minor v)
                                                          output flush
                                                          (make-hash-table 100)
                                                          (make-hash-table 100)
                                                          vlist-null)))
                        (let loop ((done? (process-stderr conn)))
                          (or done? (process-stderr conn)))
                        conn)))))))))

(define* (port->connection port
                           #:key (version %protocol-version))
  "Assimilate PORT, an input/output port, and return a connection to the
daemon, assuming the given protocol VERSION.

Warning: this procedure assumes that the initial handshake with the daemon has
already taken place on PORT and that we're just continuing on this established
connection.  Use with care."
  (let-values (((output flush)
                (buffering-output-port port (make-bytevector 8192))))
    (%make-store-connection port
                            (protocol-major version)
                            (protocol-minor version)
                            output flush
                            (make-hash-table 100)
                            (make-hash-table 100)
                            vlist-null)))

(define (store-connection-version store)
  "Return the protocol version of STORE as an integer."
  (protocol-version (store-connection-major-version store)
                    (store-connection-minor-version store)))

(define-deprecated/alias nix-server-version store-connection-version)

(define (write-buffered-output server)
  "Flush SERVER's output port."
  (force-output (store-connection-output-port server))
  ((store-connection-flush-output server)))

(define (close-connection server)
  "Close the connection to SERVER."
  (close (store-connection-socket server)))

(define-syntax-rule (with-store store exp ...)
  "Bind STORE to an open connection to the store and evaluate EXPs;
automatically close the store when the dynamic extent of EXP is left."
  (let ((store (open-connection)))
    (dynamic-wind
      (const #f)
      (lambda ()
        (parameterize ((current-store-protocol-version
                        (store-connection-version store)))
         exp) ...)
      (lambda ()
        (false-if-exception (close-connection store))))))

(define current-store-protocol-version
  ;; Protocol version of the store currently used.  XXX: This is a hack to
  ;; communicate the protocol version to the build output port.  It's a hack
  ;; because it could be inaccurrate, for instance if there's code that
  ;; manipulates several store connections at once; it works well for the
  ;; purposes of (guix status) though.
  (make-parameter #f))

(define current-build-output-port
  ;; The port where build output is sent.
  (make-parameter (current-error-port)))

(define* (dump-port in out
                    #:optional len
                    #:key (buffer-size 16384))
  "Read LEN bytes from IN (or as much as possible if LEN is #f) and write it
to OUT, using chunks of BUFFER-SIZE bytes."
  (define buffer
    (make-bytevector buffer-size))

  (let loop ((total 0)
             (bytes (get-bytevector-n! in buffer 0
                                       (if len
                                           (min len buffer-size)
                                           buffer-size))))
    (or (eof-object? bytes)
        (and len (= total len))
        (let ((total (+ total bytes)))
          (put-bytevector out buffer 0 bytes)
          (loop total
                (get-bytevector-n! in buffer 0
                                   (if len
                                       (min (- len total) buffer-size)
                                       buffer-size)))))))

(define %newlines
  ;; Newline characters triggering a flush of 'current-build-output-port'.
  ;; Unlike Guile's 'line, we flush upon #\return so that progress reports
  ;; that use that trick are correctly displayed.
  (char-set #\newline #\return))

(define* (process-stderr server #:optional user-port)
  "Read standard output and standard error from SERVER, writing it to
CURRENT-BUILD-OUTPUT-PORT.  Return #t when SERVER is done sending data, and
#f otherwise; in the latter case, the caller should call `process-stderr'
again until #t is returned or an error is raised.

Since the build process's output cannot be assumed to be UTF-8, we
conservatively consider it to be Latin-1, thereby avoiding possible
encoding conversion errors."
  (define p
    (store-connection-socket server))

  ;; magic cookies from worker-protocol.hh
  (define %stderr-next  #x6f6c6d67)          ; "olmg", build log
  (define %stderr-read  #x64617461)          ; "data", data needed from source
  (define %stderr-write #x64617416)          ; "dat\x16", data for sink
  (define %stderr-last  #x616c7473)          ; "alts", we're done
  (define %stderr-error #x63787470)          ; "cxtp", error reporting

  (let ((k (read-int p)))
    (cond ((= k %stderr-write)
           ;; Write a byte stream to USER-PORT.
           (let* ((len (read-int p))
                  (m   (modulo len 8)))
             (dump-port p user-port len
                        #:buffer-size (if (<= len 16384) 16384 65536))
             (unless (zero? m)
               ;; Consume padding, as for strings.
               (get-bytevector-n p (- 8 m))))
           #f)
          ((= k %stderr-read)
           ;; Read a byte stream from USER-PORT.
           ;; Note: Avoid 'get-bytevector-n' to work around
           ;; <http://bugs.gnu.org/17591> in Guile up to 2.0.11.
           (let* ((max-len (read-int p))
                  (data    (make-bytevector max-len))
                  (len     (get-bytevector-n! user-port data 0 max-len)))
             (write-bytevector data p len)
             #f))
          ((= k %stderr-next)
           ;; Log a string.  Build logs are usually UTF-8-encoded, but they
           ;; may also contain arbitrary byte sequences that should not cause
           ;; this to fail.  Thus, use the permissive
           ;; 'read-maybe-utf8-string'.
           (let ((s (read-maybe-utf8-string p)))
             (display s (current-build-output-port))
             (when (string-any %newlines s)
               (force-output (current-build-output-port)))
             #f))
          ((= k %stderr-error)
           ;; Report an error.
           (let ((error  (read-maybe-utf8-string p))
                 ;; Currently the daemon fails to send a status code for early
                 ;; errors like DB schema version mismatches, so check for EOF.
                 (status (if (and (>= (store-connection-minor-version server) 8)
                                  (not (eof-object? (lookahead-u8 p))))
                             (read-int p)
                             1)))
             (raise (condition (&store-protocol-error
                                (message error)
                                (status  status))))))
          ((= k %stderr-last)
           ;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
           #t)
          (else
           (raise (condition (&store-protocol-error
                              (message "invalid error code")
                              (status   k))))))))

(define %default-substitute-urls
  ;; Default list of substituters.  This is *not* the list baked in
  ;; 'guix-daemon', but it is used by 'guix-service-type' and and a couple of
  ;; clients ('guix build --log-file' uses it.)
  (map (if (false-if-exception (resolve-interface '(gnutls)))
           (cut string-append "https://" <>)
           (cut string-append "http://" <>))
       '("ci.guix.info")))

(define* (set-build-options server
                            #:key keep-failed? keep-going? fallback?
                            (verbosity 0)
                            rounds                ;number of build rounds
                            max-build-jobs
                            timeout
                            max-silent-time
                            (use-build-hook? #t)
                            (build-verbosity 0)
                            (log-type 0)
                            (print-build-trace #t)

                            ;; When true, provide machine-readable "build
                            ;; traces" for use by (guix status).  Old clients
                            ;; are unable to make sense, which is why it's
                            ;; disabled by default.
                            print-extended-build-trace?

                            ;; When true, the daemon prefixes builder output
                            ;; with "@ build-log" traces so we can
                            ;; distinguish it from daemon output, and we can
                            ;; distinguish each builder's output
                            ;; (PRINT-BUILD-TRACE must be true as well.)  The
                            ;; latter is particularly useful when
                            ;; MAX-BUILD-JOBS > 1.
                            multiplexed-build-output?

                            build-cores
                            (use-substitutes? #t)

                            ;; Client-provided substitute URLs.  If it is #f,
                            ;; the daemon's settings are used.  Otherwise, it
                            ;; overrides the daemons settings; see 'guix
                            ;; substitute'.
                            (substitute-urls #f)

                            ;; Number of columns in the client's terminal.
                            (terminal-columns (terminal-columns))

                            ;; Locale of the client.
                            (locale (false-if-exception (setlocale LC_ALL))))
  ;; Must be called after `open-connection'.

  (define socket
    (store-connection-socket server))

  (let-syntax ((send (syntax-rules ()
                       ((_ (type option) ...)
                        (begin
                          (write-arg type option socket)
                          ...)))))
    (write-int (operation-id set-options) socket)
    (send (boolean keep-failed?) (boolean keep-going?)
          (boolean fallback?) (integer verbosity))
    (when (< (store-connection-minor-version server) #x61)
      (let ((max-build-jobs (or max-build-jobs 1))
            (max-silent-time (or max-silent-time 3600)))
        (send (integer max-build-jobs) (integer max-silent-time))))
    (when (>= (store-connection-minor-version server) 2)
      (send (boolean use-build-hook?)))
    (when (>= (store-connection-minor-version server) 4)
      (send (integer build-verbosity) (integer log-type)
            (boolean print-build-trace)))
    (when (and (>= (store-connection-minor-version server) 6)
               (< (store-connection-minor-version server) #x61))
      (let ((build-cores (or build-cores (current-processor-count))))
        (send (integer build-cores))))
    (when (>= (store-connection-minor-version server) 10)
      (send (boolean use-substitutes?)))
    (when (>= (store-connection-minor-version server) 12)
      (let ((pairs `(;; This option is honored by 'guix substitute' et al.
                     ,@(if print-build-trace
                           `(("print-extended-build-trace"
                              . ,(if print-extended-build-trace? "1" "0")))
                           '())
                     ,@(if multiplexed-build-output?
                           `(("multiplexed-build-output"
                              . ,(if multiplexed-build-output? "true" "false")))
                           '())
                     ,@(if timeout
                           `(("build-timeout" . ,(number->string timeout)))
                           '())
                     ,@(if max-silent-time
                           `(("build-max-silent-time"
                              . ,(number->string max-silent-time)))
                           '())
                     ,@(if max-build-jobs
                           `(("build-max-jobs"
                              . ,(number->string max-build-jobs)))
                           '())
                     ,@(if build-cores
                           `(("build-cores" . ,(number->string build-cores)))
                           '())
                     ,@(if substitute-urls
                           `(("substitute-urls"
                              . ,(string-join substitute-urls)))
                           '())
                     ,@(if rounds
                           `(("build-repeat"
                              . ,(number->string (max 0 (1- rounds)))))
                           '())
                     ,@(if terminal-columns
                           `(("terminal-columns"
                              . ,(number->string terminal-columns)))
                           '())
                     ,@(if locale
                           `(("locale" . ,locale))
                           '()))))
        (send (string-pairs pairs))))
    (let loop ((done? (process-stderr server)))
      (or done? (process-stderr server)))))

(define (buffering-output-port port buffer)
  "Return two value: an output port wrapped around PORT that uses BUFFER (a
bytevector) as its internal buffer, and a thunk to flush this output port."
  ;; Note: In Guile 2.2.2, custom binary output ports already have their own
  ;; 4K internal buffer.
  (define size
    (bytevector-length buffer))

  (define total 0)

  (define (flush)
    (put-bytevector port buffer 0 total)
    (force-output port)
    (set! total 0))

  (define (write bv offset count)
    (if (zero? count)                             ;end of file
        (flush)
        (let loop ((offset offset)
                   (count count)
                   (written 0))
          (cond ((= total size)
                 (flush)
                 (loop offset count written))
                ((zero? count)
                 written)
                (else
                 (let ((to-copy (min count (- size total))))
                   (bytevector-copy! bv offset buffer total to-copy)
                   (set! total (+ total to-copy))
                   (loop (+ offset to-copy) (- count to-copy)
                         (+ written to-copy))))))))

  ;; Note: We need to return FLUSH because the custom binary port has no way
  ;; to be notified of a 'force-output' call on itself.
  (values (make-custom-binary-output-port "buffering-output-port"
                                          write #f #f flush)
          flush))

(define profiled?
  (let ((profiled
         (or (and=> (getenv "GUIX_PROFILING") string-tokenize)
             '())))
    (lambda (component)
      "Return true if COMPONENT profiling is active."
      (member component profiled))))

(define %rpc-calls
  ;; Mapping from RPC names (symbols) to invocation counts.
  (make-hash-table))

(define* (show-rpc-profile #:optional (port (current-error-port)))
  "Write to PORT a summary of the RPCs that have been made."
  (let ((profile (sort (hash-fold alist-cons '() %rpc-calls)
                       (lambda (rpc1 rpc2)
                         (< (cdr rpc1) (cdr rpc2))))))
    (format port "Remote procedure call summary: ~a RPCs~%"
            (match profile
              (((names . counts) ...)
               (reduce + 0 counts))))
    (for-each (match-lambda
                ((rpc . count)
                 (format port "  ~30a ... ~5@a~%" rpc count)))
              profile)))

(define record-operation
  ;; Optionally, increment the number of calls of the given RPC.
  (if (profiled? "rpc")
      (begin
        (register-profiling-hook! "rpc" show-rpc-profile)
        (lambda (name)
          (let ((count (or (hashq-ref %rpc-calls name) 0)))
            (hashq-set! %rpc-calls name (+ count 1)))))
      (lambda (_)
        #t)))

(define-syntax operation
  (syntax-rules ()
    "Define a client-side RPC stub for the given operation."
    ((_ (name (type arg) ...) docstring return ...)
     (lambda (server arg ...)
       docstring
       (let* ((s (store-connection-socket server))
              (buffered (store-connection-output-port server)))
         (record-operation 'name)
         (write-int (operation-id name) buffered)
         (write-arg type arg buffered)
         ...
         (write-buffered-output server)

         ;; Loop until the server is done sending error output.
         (let loop ((done? (process-stderr server)))
           (or done? (loop (process-stderr server))))
         (values (read-arg return s) ...))))))

(define-syntax-rule (define-operation (name args ...)
                      docstring return ...)
  (define name
    (operation (name args ...) docstring return ...)))

(define-operation (valid-path? (string path))
  "Return #t when PATH designates a valid store item and #f otherwise (an
invalid item may exist on disk but still be invalid, for instance because it
is the result of an aborted or failed build.)

A '&store-protocol-error' condition is raised if PATH is not prefixed by the
store directory (/gnu/store)."
  boolean)

(define-operation (query-path-hash (store-path path))
  "Return the SHA256 hash of the nar serialization of PATH as a bytevector."
  base16)

(define hash-part->path
  (let ((query-path-from-hash-part
         (operation (query-path-from-hash-part (string hash))
                    #f
                    store-path)))
   (lambda (server hash-part)
     "Return the store path whose hash part is HASH-PART (a nix-base32
string).  Raise an error if no such path exists."
     ;; This RPC is primarily used by Hydra to reply to HTTP GETs of
     ;; /HASH.narinfo.
     (query-path-from-hash-part server hash-part))))

(define-operation (query-path-info (store-path path))
  "Return the info (hash, references, etc.) for PATH."
  path-info)

(define add-data-to-store
  ;; A memoizing version of `add-to-store', to avoid repeated RPCs with
  ;; the very same arguments during a given session.
  (let ((add-text-to-store
         (operation (add-text-to-store (string name) (bytevector text)
                                       (string-list references))
                    #f
                    store-path)))
    (lambda* (server name bytes #:optional (references '()))
      "Add BYTES under file NAME in the store, and return its store path.
REFERENCES is the list of store paths referred to by the resulting store
path."
      (let* ((args  `(,bytes ,name ,references))
             (cache (store-connection-add-text-to-store-cache server)))
        (or (hash-ref cache args)
            (let ((path (add-text-to-store server name bytes references)))
              (hash-set! cache args path)
              path))))))

(define* (add-text-to-store store name text #:optional (references '()))
  "Add TEXT under file NAME in the store, and return its store path.
REFERENCES is the list of store paths referred to by the resulting store
path."
  (add-data-to-store store name (string->utf8 text) references))

(define true
  ;; Define it once and for all since we use it as a default value for
  ;; 'add-to-store' and want to make sure two default values are 'eq?' for the
  ;; purposes or memoization.
  (lambda (file stat)
    #t))

(define add-to-store
  ;; A memoizing version of `add-to-store'.  This is important because
  ;; `add-to-store' leads to huge data transfers to the server, and
  ;; because it's often called many times with the very same argument.
  (let ((add-to-store
         (lambda* (server basename recursive? hash-algo file-name
                          #:key (select? true))
           ;; We don't use the 'operation' macro so we can pass SELECT? to
           ;; 'write-file'.
           (record-operation 'add-to-store)
           (let ((port (store-connection-socket server)))
             (write-int (operation-id add-to-store) port)
             (write-string basename port)
             (write-int 1 port)                   ;obsolete, must be #t
             (write-int (if recursive? 1 0) port)
             (write-string hash-algo port)
             (write-file file-name port #:select? select?)
             (write-buffered-output server)
             (let loop ((done? (process-stderr server)))
               (or done? (loop (process-stderr server))))
             (read-store-path port)))))
    (lambda* (server basename recursive? hash-algo file-name
                     #:key (select? true))
      "Add the contents of FILE-NAME under BASENAME to the store.  When
RECURSIVE? is false, FILE-NAME must designate a regular file--not a directory
nor a symlink.  When RECURSIVE? is true and FILE-NAME designates a directory,
the contents of FILE-NAME are added recursively; if FILE-NAME designates a
flat file and RECURSIVE? is true, its contents are added, and its permission
bits are kept.  HASH-ALGO must be a string such as \"sha256\".

When RECURSIVE? is true, call (SELECT?  FILE STAT) for each directory entry,
where FILE is the entry's absolute file name and STAT is the result of
'lstat'; exclude entries for which SELECT? does not return true."
      ;; Note: We don't stat FILE-NAME at each call, and thus we assume that
      ;; the file remains unchanged for the lifetime of SERVER.
      (let* ((args  `(,file-name ,basename ,recursive? ,hash-algo ,select?))
             (cache (store-connection-add-to-store-cache server)))
        (or (hash-ref cache args)
            (let ((path (add-to-store server basename recursive?
                                      hash-algo file-name
                                      #:select? select?)))
              (hash-set! cache args path)
              path))))))

(define %not-slash
  (char-set-complement (char-set #\/)))

(define* (add-file-tree-to-store server tree
                                 #:key
                                 (hash-algo "sha256")
                                 (recursive? #t))
  "Add the given TREE to the store on SERVER.  TREE must be an entry such as:

  (\"my-tree\" directory
    (\"a\" regular (data \"hello\"))
    (\"b\" symlink \"a\")
    (\"c\" directory
      (\"d\" executable (file \"/bin/sh\"))))

This is a generalized version of 'add-to-store'.  It allows you to reproduce
an arbitrary directory layout in the store without creating a derivation."

  ;; Note: The format of TREE was chosen to allow trees to be compared with
  ;; 'equal?', which in turn allows us to memoize things.

  (define root
    ;; TREE is a single entry.
    (list tree))

  (define basename
    (match tree
      ((name . _) name)))

  (define (lookup file)
    (let loop ((components (string-tokenize file %not-slash))
               (tree root))
      (match components
        ((basename)
         (assoc basename tree))
        ((head . rest)
         (loop rest
               (match (assoc-ref tree head)
                 (('directory . entries) entries)))))))

  (define (file-type+size file)
    (match (lookup file)
      ((_ (and type (or 'directory 'symlink)) . _)
       (values type 0))
      ((_ type ('file file))
       (values type (stat:size (stat file))))
      ((_ type ('data (? string? data)))
       (values type (string-length data)))
      ((_ type ('data (? bytevector? data)))
       (values type (bytevector-length data)))))

  (define (file-port file)
    (match (lookup file)
      ((_ (or 'regular 'executable) content)
       (match content
         (('file (? string? file))
          (open-file file "r0b"))
         (('data (? string? str))
          (open-input-string str))
         (('data (? bytevector? bv))
          (open-bytevector-input-port bv))))))

  (define (symlink-target file)
    (match (lookup file)
      ((_ 'symlink target) target)))

  (define (directory-entries directory)
    (match (lookup directory)
      ((_ 'directory (names . _) ...) names)))

  (define cache
    (store-connection-add-to-store-cache server))

  (or (hash-ref cache tree)
      (begin
        ;; We don't use the 'operation' macro so we can use 'write-file-tree'
        ;; instead of 'write-file'.
        (record-operation 'add-to-store/tree)
        (let ((port (store-connection-socket server)))
          (write-int (operation-id add-to-store) port)
          (write-string basename port)
          (write-int 1 port)                      ;obsolete, must be #t
          (write-int (if recursive? 1 0) port)
          (write-string hash-algo port)
          (write-file-tree basename port
                           #:file-type+size file-type+size
                           #:file-port file-port
                           #:symlink-target symlink-target
                           #:directory-entries directory-entries)
          (write-buffered-output server)
          (let loop ((done? (process-stderr server)))
            (or done? (loop (process-stderr server))))
          (let ((result (read-store-path port)))
            (hash-set! cache tree result)
            result)))))

(define build-things
  (let ((build (operation (build-things (string-list things)
                                        (integer mode))
                          "Do it!"
                          boolean))
        (build/old (operation (build-things (string-list things))
                              "Do it!"
                              boolean)))
    (lambda* (store things #:optional (mode (build-mode normal)))
      "Build THINGS, a list of store items which may be either '.drv' files or
outputs, and return when the worker is done building them.  Elements of THINGS
that are not derivations can only be substituted and not built locally.
Return #t on success."
      (parameterize ((current-store-protocol-version
                      (store-connection-version store)))
        (if (>= (store-connection-minor-version store) 15)
            (build store things mode)
            (if (= mode (build-mode normal))
                (build/old store things)
                (raise (condition (&store-protocol-error
                                   (message "unsupported build mode")
                                   (status  1))))))))))

(define-operation (add-temp-root (store-path path))
  "Make PATH a temporary root for the duration of the current session.
Return #t."
  boolean)

(define-operation (add-indirect-root (string file-name))
  "Make the symlink FILE-NAME an indirect root for the garbage collector:
whatever store item FILE-NAME points to will not be collected.  Return #t on
success.

FILE-NAME can be anywhere on the file system, but it must be an absolute file
name--it is the caller's responsibility to ensure that it is an absolute file
name."
  boolean)

(define %gc-roots-directory
  ;; The place where garbage collector roots (symlinks) are kept.
  (string-append %state-directory "/gcroots"))

(define (add-permanent-root target)
  "Add a garbage collector root pointing to TARGET, an element of the store,
preventing TARGET from even being collected.  This can also be used if TARGET
does not exist yet.

Raise an error if the caller does not have write access to the GC root
directory."
  (let* ((root (string-append %gc-roots-directory "/" (basename target))))
    (catch 'system-error
      (lambda ()
        (symlink target root))
      (lambda args
        ;; If ROOT already exists, this is fine; otherwise, re-throw.
        (unless (= EEXIST (system-error-errno args))
          (apply throw args))))))

(define (remove-permanent-root target)
  "Remove the permanent garbage collector root pointing to TARGET.  Raise an
error if there is no such root."
  (delete-file (string-append %gc-roots-directory "/" (basename target))))

(define references
  (operation (query-references (store-path path))
             "Return the list of references of PATH."
             store-path-list))

(define %reference-cache
  ;; Brute-force cache mapping store items to their list of references.
  ;; Caching matters because when building a profile in the presence of
  ;; grafts, we keep calling 'graft-derivation', which in turn calls
  ;; 'references/substitutes' many times with the same arguments.  Ideally we
  ;; would use a cache associated with the daemon connection instead (XXX).
  (make-hash-table 100))

(define (references/substitutes store items)
  "Return the list of list of references of ITEMS; the result has the same
length as ITEMS.  Query substitute information for any item missing from the
store at once.  Raise a '&store-protocol-error' exception if reference
information for one of ITEMS is missing."
  (let* ((requested  items)
         (local-refs (map (lambda (item)
                            (or (hash-ref %reference-cache item)
                                (guard (c ((store-protocol-error? c) #f))
                                  (references store item))))
                          items))
         (missing    (fold-right (lambda (item local-ref result)
                                   (if local-ref
                                       result
                                       (cons item result)))
                                 '()
                                 items local-refs))

         ;; Query all the substitutes at once to minimize the cost of
         ;; launching 'guix substitute' and making HTTP requests.
         (substs     (if (null? missing)
                         '()
                         (substitutable-path-info store missing))))
    (when (< (length substs) (length missing))
      (raise (condition (&store-protocol-error
                         (message "cannot determine \
the list of references")
                         (status 1)))))

    ;; Intersperse SUBSTS and LOCAL-REFS.
    (let loop ((items       items)
               (local-refs  local-refs)
               (result      '()))
      (match items
        (()
         (let ((result (reverse result)))
           (for-each (cut hash-set! %reference-cache <> <>)
                     requested result)
           result))
        ((item items ...)
         (match local-refs
           ((#f tail ...)
            (loop items tail
                  (cons (any (lambda (subst)
                               (and (string=? (substitutable-path subst) item)
                                    (substitutable-references subst)))
                             substs)
                        result)))
           ((head tail ...)
            (loop items tail
                  (cons head result)))))))))

(define* (fold-path store proc seed paths
                    #:optional (relatives (cut references store <>)))
  "Call PROC for each of the RELATIVES of PATHS, exactly once, and return the
result formed from the successive calls to PROC, the first of which is passed
SEED."
  (let loop ((paths  paths)
             (result seed)
             (seen   vlist-null))
    (match paths
      ((path rest ...)
       (if (vhash-assoc path seen)
           (loop rest result seen)
           (let ((seen   (vhash-cons path #t seen))
                 (rest   (append rest (relatives path)))
                 (result (proc path result)))
             (loop rest result seen))))
      (()
       result))))

(define (requisites store paths)
  "Return the requisites of PATHS, including PATHS---i.e., their closures (all
its references, recursively)."
  (fold-path store cons '() paths))

(define (topologically-sorted store paths)
  "Return a list containing PATHS and all their references sorted in
topological order."
  (define (traverse)
    ;; Do a simple depth-first traversal of all of PATHS.
    (let loop ((paths   paths)
               (visited vlist-null)
               (result  '()))
      (define (visit n)
        (vhash-cons n #t visited))

      (define (visited? n)
        (vhash-assoc n visited))

      (match paths
        ((head tail ...)
         (if (visited? head)
             (loop tail visited result)
             (call-with-values
                 (lambda ()
                   (loop (references store head)
                         (visit head)
                         result))
               (lambda (visited result)
                 (loop tail
                       visited
                       (cons head result))))))
        (()
         (values visited result)))))

  (call-with-values traverse
    (lambda (_ result)
      (reverse result))))

(define referrers
  (operation (query-referrers (store-path path))
             "Return the list of path that refer to PATH."
             store-path-list))

(define valid-derivers
  (operation (query-valid-derivers (store-path path))
             "Return the list of valid \"derivers\" of PATH---i.e., all the
.drv present in the store that have PATH among their outputs."
             store-path-list))

(define query-derivation-outputs  ; avoid name clash with `derivation-outputs'
  (operation (query-derivation-outputs (store-path path))
             "Return the list of outputs of PATH, a .drv file."
             store-path-list))

(define-operation (has-substitutes? (store-path path))
  "Return #t if binary substitutes are available for PATH, and #f otherwise."
  boolean)

(define substitutable-paths
  (operation (query-substitutable-paths (store-path-list paths))
             "Return the subset of PATHS that is substitutable."
             store-path-list))

(define substitutable-path-info
  (operation (query-substitutable-path-infos (store-path-list paths))
             "Return information about the subset of PATHS that is
substitutable.  For each substitutable path, a `substitutable?' object is
returned; thus, the resulting list can be shorter than PATHS.  Furthermore,
that there is no guarantee that the order of the resulting list matches the
order of PATHS."
             substitutable-path-list))

(define built-in-builders
  (let ((builders (operation (built-in-builders)
                             "Return the built-in builders."
                             string-list)))
    (lambda (store)
      "Return the names of the supported built-in derivation builders
supported by STORE."
      ;; Check whether STORE's version supports this RPC and built-in
      ;; derivation builders in general, which appeared in Guix > 0.11.0.
      ;; Return the empty list if it doesn't.  Note that this RPC does not
      ;; exist in 'nix-daemon'.
      (if (or (> (store-connection-major-version store) #x100)
              (and (= (store-connection-major-version store) #x100)
                   (>= (store-connection-minor-version store) #x60)))
          (builders store)
          '()))))

(define-operation (optimize-store)
  "Optimize the store by hard-linking identical files (\"deduplication\".)
Return #t on success."
  ;; Note: the daemon in Guix <= 0.8.2 does not implement this RPC.
  boolean)

(define verify-store
  (let ((verify (operation (verify-store (boolean check-contents?)
                                         (boolean repair?))
                           "Verify the store."
                           boolean)))
    (lambda* (store #:key check-contents? repair?)
      "Verify the integrity of the store and return false if errors remain,
and true otherwise.  When REPAIR? is true, repair any missing or altered store
items by substituting them (this typically requires root privileges because it
is not an atomic operation.)  When CHECK-CONTENTS? is true, check the contents
of store items; this can take a lot of time."
      (not (verify store check-contents? repair?)))))

(define (run-gc server action to-delete min-freed)
  "Perform the garbage-collector operation ACTION, one of the
`gc-action' values.  When ACTION is `delete-specific', the TO-DELETE is
the list of store paths to delete.  IGNORE-LIVENESS? should always be
#f.  MIN-FREED is the minimum amount of disk space to be freed, in
bytes, before the GC can stop.  Return the list of store paths delete,
and the number of bytes freed."
  (let ((s (store-connection-socket server)))
    (write-int (operation-id collect-garbage) s)
    (write-int action s)
    (write-store-path-list to-delete s)
    (write-arg boolean #f s)                      ; ignore-liveness?
    (write-long-long min-freed s)
    (write-int 0 s)                               ; obsolete
    (when (>= (store-connection-minor-version server) 5)
      ;; Obsolete `use-atime' and `max-atime' parameters.
      (write-int 0 s)
      (write-int 0 s))

    ;; Loop until the server is done sending error output.
    (let loop ((done? (process-stderr server)))
      (or done? (loop (process-stderr server))))

    (let ((paths    (read-store-path-list s))
          (freed    (read-long-long s))
          (obsolete (read-long-long s)))
      (unless (null? paths)
        ;; To be on the safe side, completely invalidate both caches.
        ;; Otherwise we could end up returning store paths that are no longer
        ;; valid.
        (hash-clear! (store-connection-add-to-store-cache server))
        (hash-clear! (store-connection-add-text-to-store-cache server)))

     (values paths freed))))

(define-syntax-rule (%long-long-max)
  ;; Maximum unsigned 64-bit integer.
  (- (expt 2 64) 1))

(define (live-paths server)
  "Return the list of live store paths---i.e., store paths still
referenced, and thus not subject to being garbage-collected."
  (run-gc server (gc-action return-live) '() (%long-long-max)))

(define (dead-paths server)
  "Return the list of dead store paths---i.e., store paths no longer
referenced, and thus subject to being garbage-collected."
  (run-gc server (gc-action return-dead) '() (%long-long-max)))

(define* (collect-garbage server #:optional (min-freed (%long-long-max)))
  "Collect garbage from the store at SERVER.  If MIN-FREED is non-zero,
then collect at least MIN-FREED bytes.  Return the paths that were
collected, and the number of bytes freed."
  (run-gc server (gc-action delete-dead) '() min-freed))

(define* (delete-paths server paths #:optional (min-freed (%long-long-max)))
  "Delete PATHS from the store at SERVER, if they are no longer
referenced.  If MIN-FREED is non-zero, then stop after at least
MIN-FREED bytes have been collected.  Return the paths that were
collected, and the number of bytes freed."
  (run-gc server (gc-action delete-specific) paths min-freed))

(define (import-paths server port)
  "Import the set of store paths read from PORT into SERVER's store.  An error
is raised if the set of paths read from PORT is not signed (as per
'export-path #:sign? #t'.)  Return the list of store paths imported."
  (let ((s (store-connection-socket server)))
    (write-int (operation-id import-paths) s)
    (let loop ((done? (process-stderr server port)))
      (or done? (loop (process-stderr server port))))
    (read-store-path-list s)))

(define* (export-path server path port #:key (sign? #t))
  "Export PATH to PORT.  When SIGN? is true, sign it."
  (let ((s (store-connection-socket server)))
    (write-int (operation-id export-path) s)
    (write-store-path path s)
    (write-arg boolean sign? s)
    (let loop ((done? (process-stderr server port)))
      (or done? (loop (process-stderr server port))))
    (= 1 (read-int s))))

(define* (export-paths server paths port #:key (sign? #t) recursive?)
  "Export the store paths listed in PATHS to PORT, in topological order,
signing them if SIGN? is true.  When RECURSIVE? is true, export the closure of
PATHS---i.e., PATHS and all their dependencies."
  (define ordered
    (let ((sorted (topologically-sorted server paths)))
      ;; When RECURSIVE? is #f, filter out the references of PATHS.
      (if recursive?
          sorted
          (filter (cut member <> paths) sorted))))

  (let loop ((paths ordered))
    (match paths
      (()
       (write-int 0 port))
      ((head tail ...)
       (write-int 1 port)
       (and (export-path server head port #:sign? sign?)
            (loop tail))))))

(define-operation (query-failed-paths)
  "Return the list of store items for which a build failure is cached.

The result is always the empty list unless the daemon was started with
'--cache-failures'."
  store-path-list)

(define-operation (clear-failed-paths (store-path-list items))
  "Remove ITEMS from the list of cached build failures.

This makes sense only when the daemon was started with '--cache-failures'."
  boolean)

\f
;;;
;;; Store monad.
;;;

(define-syntax-rule (define-alias new old)
  (define-syntax new (identifier-syntax old)))

;; The store monad allows us to (1) build sequences of operations in the
;; store, and (2) make the store an implicit part of the execution context,
;; rather than a parameter of every single function.
(define-alias %store-monad %state-monad)
(define-alias store-return state-return)
(define-alias store-bind state-bind)

;; Instantiate templates for %STORE-MONAD since it's syntactically different
;; from %STATE-MONAD.
(template-directory instantiations %store-monad)

(define* (cache-object-mapping object keys result)
  "Augment the store's object cache with a mapping from OBJECT/KEYS to RESULT.
KEYS is a list of additional keys to match against, for instance a (SYSTEM
TARGET) tuple.

OBJECT is typically a high-level object such as a <package> or an <origin>,
and RESULT is typically its derivation."
  (lambda (store)
    (values result
            (store-connection
             (inherit store)
             (object-cache (vhash-consq object (cons result keys)
                                        (store-connection-object-cache store)))))))

(define record-cache-lookup!
  (if (profiled? "object-cache")
      (let ((fresh    0)
            (lookups  0)
            (hits     0))
        (register-profiling-hook!
         "object-cache"
         (lambda ()
           (format (current-error-port) "Store object cache:
  fresh caches: ~5@a
  lookups:      ~5@a
  hits:         ~5@a (~,1f%)~%"
                   fresh lookups hits
                   (if (zero? lookups)
                       100.
                       (* 100. (/ hits lookups))))))

        (lambda (hit? cache)
          (set! fresh
            (if (eq? cache vlist-null)
                (+ 1 fresh)
                fresh))
          (set! lookups (+ 1 lookups))
          (set! hits (if hit? (+ hits 1) hits))))
      (lambda (x y)
        #t)))

(define* (lookup-cached-object object #:optional (keys '()))
  "Return the cached object in the store connection corresponding to OBJECT
and KEYS.  KEYS is a list of additional keys to match against, and which are
compared with 'equal?'.  Return #f on failure and the cached result
otherwise."
  (lambda (store)
    (let* ((cache (store-connection-object-cache store))

           ;; Escape as soon as we find the result.  This avoids traversing
           ;; the whole vlist chain and significantly reduces the number of
           ;; 'hashq' calls.
           (value (let/ec return
                    (vhash-foldq* (lambda (item result)
                                    (match item
                                      ((value . keys*)
                                       (if (equal? keys keys*)
                                           (return value)
                                           result))))
                                  #f object
                                  cache))))
      (record-cache-lookup! value cache)
      (values value store))))

(define* (%mcached mthunk object #:optional (keys '()))
  "Bind the monadic value returned by MTHUNK, which supposedly corresponds to
OBJECT/KEYS, or return its cached value."
  (mlet %store-monad ((cached (lookup-cached-object object keys)))
    (if cached
        (return cached)
        (>>= (mthunk)
             (lambda (result)
               (cache-object-mapping object keys result))))))

(define-syntax-rule (mcached mvalue object keys ...)
  "Run MVALUE, which corresponds to OBJECT/KEYS, and cache it; or return the
value associated with OBJECT/KEYS in the store's object cache if there is
one."
  (%mcached (lambda () mvalue)
            object (list keys ...)))

(define (preserve-documentation original proc)
  "Return PROC with documentation taken from ORIGINAL."
  (set-object-property! proc 'documentation
                        (procedure-property original 'documentation))
  proc)

(define (store-lift proc)
  "Lift PROC, a procedure whose first argument is a connection to the store,
in the store monad."
  (preserve-documentation proc
                          (lambda args
                            (lambda (store)
                              (values (apply proc store args) store)))))

(define (store-lower proc)
  "Lower PROC, a monadic procedure in %STORE-MONAD, to a \"normal\" procedure
taking the store as its first argument."
  (preserve-documentation proc
                          (lambda (store . args)
                            (run-with-store store (apply proc args)))))

;;
;; Store monad operators.
;;

(define* (binary-file name
                      data ;bytevector
                      #:optional (references '()))
  "Return as a monadic value the absolute file name in the store of the file
containing DATA, a bytevector.  REFERENCES is a list of store items that the
resulting text file refers to; it defaults to the empty list."
  (lambda (store)
    (values (add-data-to-store store name data references)
            store)))

(define* (text-file name
                    text ;string
                    #:optional (references '()))
  "Return as a monadic value the absolute file name in the store of the file
containing TEXT, a string.  REFERENCES is a list of store items that the
resulting text file refers to; it defaults to the empty list."
  (lambda (store)
    (values (add-text-to-store store name text references)
            store)))

(define* (interned-file file #:optional name
                        #:key (recursive? #t) (select? true))
  "Return the name of FILE once interned in the store.  Use NAME as its store
name, or the basename of FILE if NAME is omitted.

When RECURSIVE? is true, the contents of FILE are added recursively; if FILE
designates a flat file and RECURSIVE? is true, its contents are added, and its
permission bits are kept.

When RECURSIVE? is true, call (SELECT?  FILE STAT) for each directory entry,
where FILE is the entry's absolute file name and STAT is the result of
'lstat'; exclude entries for which SELECT? does not return true."
  (lambda (store)
    (values (add-to-store store (or name (basename file))
                          recursive? "sha256" file
                          #:select? select?)
            store)))

(define interned-file-tree
  (store-lift add-file-tree-to-store))

(define build
  ;; Monadic variant of 'build-things'.
  (store-lift build-things))

(define set-build-options*
  (store-lift set-build-options))

(define references*
  (store-lift references))

(define (query-path-info* item)
  "Monadic version of 'query-path-info' that returns #f when ITEM is not in
the store."
  (lambda (store)
    (guard (c ((store-protocol-error? c)
               ;; ITEM is not in the store; return #f.
               (values #f store)))
      (values (query-path-info store item) store))))

(define-inlinable (current-system)
  ;; Consult the %CURRENT-SYSTEM fluid at bind time.  This is equivalent to
  ;; (lift0 %current-system %store-monad), but inlinable, thus avoiding
  ;; closure allocation in some cases.
  (lambda (state)
    (values (%current-system) state)))

(define-inlinable (set-current-system system)
  ;; Set the %CURRENT-SYSTEM fluid at bind time.
  (lambda (state)
    (values (%current-system system) state)))

(define %guile-for-build
  ;; The derivation of the Guile to be used within the build environment,
  ;; when using 'gexp->derivation' and co.
  (make-parameter #f))

(define* (run-with-store store mval
                         #:key
                         (guile-for-build (%guile-for-build))
                         (system (%current-system))
                         (target #f))
  "Run MVAL, a monadic value in the store monad, in STORE, an open store
connection, and return the result."
  ;; Initialize the dynamic bindings here to avoid bad surprises.  The
  ;; difficulty lies in the fact that dynamic bindings are resolved at
  ;; bind-time and not at call time, which can be disconcerting.
  (parameterize ((%guile-for-build guile-for-build)
                 (%current-system system)
                 (%current-target-system target))
    (call-with-values (lambda ()
                        (run-with-state mval store))
      (lambda (result store)
        ;; Discard the state.
        result))))

\f
;; Uses VALID-DERIVERS, so can't go in (guix store files)
(define (log-file store file)
  "Return the build log file for FILE, or #f if none could be found.  FILE
must be an absolute store file name, or a derivation file name."
  (cond ((derivation-path? file)
         (derivation-log-file file))
        (else
         (match (valid-derivers store file)
           ((derivers ...)
            ;; Return the first that works.
            (any (cut log-file store <>) derivers))
           (_ #f)))))

;;; Local Variables:
;;; eval: (put 'system-error-to-connection-error 'scheme-indent-function 1)
;;; End:

debug log:

solving d1ccf36f27 ...
found d1ccf36f27 in https://yhetil.org/guix/87k1g61ycq.fsf@cune.org/
found 0a0a7c7c52 in https://git.savannah.gnu.org/cgit/guix.git
preparing index
index prepared:
100644 0a0a7c7c52180dad71b16d0e123247a757068e44	guix/store.scm

applying [1/1] https://yhetil.org/guix/87k1g61ycq.fsf@cune.org/
diff --git a/guix/store.scm b/guix/store.scm
index 0a0a7c7c52..d1ccf36f27 100644

Checking patch guix/store.scm...
Applied patch guix/store.scm cleanly.

index at:
100644 d1ccf36f274efd5e5aab1032051eabb561aeb7c1	guix/store.scm

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/guix.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.