unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
blob 74312bc20f8adc80d22bcd24822ec4cdf16130b7 51279 bytes (raw)
name: lisp/org/ox-publish.el 	 # 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
 
;;; ox-publish.el --- Publish Related Org Mode Files as a Website -*- lexical-binding: t; -*-
;; Copyright (C) 2006-2019 Free Software Foundation, Inc.

;; Author: David O'Toole <dto@gnu.org>
;; Maintainer: Carsten Dominik <carsten DOT dominik AT gmail DOT com>
;; Keywords: hypermedia, outlines, wp

;; This file is part of GNU Emacs.
;;
;; GNU Emacs 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 Emacs 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 Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This program allow configurable publishing of related sets of
;; Org mode files as a complete website.
;;
;; ox-publish.el can do the following:
;;
;; + Publish all one's Org files to a given export back-end
;; + Upload HTML, images, attachments and other files to a web server
;; + Exclude selected private pages from publishing
;; + Publish a clickable sitemap of pages
;; + Manage local timestamps for publishing only changed files
;; + Accept plugin functions to extend range of publishable content
;;
;; Documentation for publishing is in the manual.

;;; Code:

(require 'cl-lib)
(require 'format-spec)
(require 'ox)


\f
;;; Variables

;; Here, so you find the variable right before it's used the first time:
(defvar org-publish-cache nil
  "This will cache timestamps and titles for files in publishing projects.
Blocks could hash sha1 values here.")

(defvar org-publish-after-publishing-hook nil
  "Hook run each time a file is published.
Every function in this hook will be called with two arguments:
the name of the original file and the name of the file
produced.")

(defgroup org-export-publish nil
  "Options for publishing a set of files."
  :tag "Org Publishing"
  :group 'org-export)

(defcustom org-publish-project-alist nil
  "Association list to control publishing behavior.
\\<org-mode-map>
Each element of the alist is a publishing project.  The car of
each element is a string, uniquely identifying the project.  The
cdr of each element is in one of the following forms:

1. A well-formed property list with an even number of elements,
   alternating keys and values, specifying parameters for the
   publishing process.

     (:property value :property value ... )

2. A meta-project definition, specifying of a list of
   sub-projects:

     (:components (\"project-1\" \"project-2\" ...))

When the CDR of an element of org-publish-project-alist is in
this second form, the elements of the list after `:components'
are taken to be components of the project, which group together
files requiring different publishing options.  When you publish
such a project with `\\[org-publish]', the components all publish.

When a property is given a value in `org-publish-project-alist',
its setting overrides the value of the corresponding user
variable (if any) during publishing.  However, options set within
a file override everything.

Most properties are optional, but some should always be set:

  `:base-directory'

    Directory containing publishing source files.

  `:base-extension'

    Extension (without the dot!) of source files.  This can be
    a regular expression.  If not given, \"org\" will be used as
    default extension.  If it is `any', include all the files,
    even without extension.

  `:publishing-directory'

    Directory (possibly remote) where output files will be
    published.

If `:recursive' is non-nil files in sub-directories of
`:base-directory' are considered.

The `:exclude' property may be used to prevent certain files from
being published.  Its value may be a string or regexp matching
file names you don't want to be published.

The `:include' property may be used to include extra files.  Its
value may be a list of filenames to include.  The filenames are
considered relative to the base directory.

When both `:include' and `:exclude' properties are given values,
the exclusion step happens first.

One special property controls which back-end function to use for
publishing files in the project.  This can be used to extend the
set of file types publishable by `org-publish', as well as the
set of output formats.

  `:publishing-function'

    Function to publish file.  Each back-end may define its
    own (i.e. `org-latex-publish-to-pdf',
    `org-html-publish-to-html').  May be a list of functions, in
    which case each function in the list is invoked in turn.

Another property allows you to insert code that prepares
a project for publishing.  For example, you could call GNU Make
on a certain makefile, to ensure published files are built up to
date.

  `:preparation-function'

    Function to be called before publishing this project.  This
    may also be a list of functions.  Preparation functions are
    called with the project properties list as their sole
    argument.

  `:completion-function'

    Function to be called after publishing this project.  This
    may also be a list of functions.  Completion functions are
    called with the project properties list as their sole
    argument.

Some properties control details of the Org publishing process,
and are equivalent to the corresponding user variables listed in
the right column.  Back-end specific properties may also be
included.  See the back-end documentation for more information.

  :author                   `user-full-name'
  :creator                  `org-export-creator-string'
  :email                    `user-mail-address'
  :exclude-tags             `org-export-exclude-tags'
  :headline-levels          `org-export-headline-levels'
  :language                 `org-export-default-language'
  :preserve-breaks          `org-export-preserve-breaks'
  :section-numbers          `org-export-with-section-numbers'
  :select-tags              `org-export-select-tags'
  :time-stamp-file          `org-export-time-stamp-file'
  :with-archived-trees      `org-export-with-archived-trees'
  :with-author              `org-export-with-author'
  :with-creator             `org-export-with-creator'
  :with-date                `org-export-with-date'
  :with-drawers             `org-export-with-drawers'
  :with-email               `org-export-with-email'
  :with-emphasize           `org-export-with-emphasize'
  :with-entities            `org-export-with-entities'
  :with-fixed-width         `org-export-with-fixed-width'
  :with-footnotes           `org-export-with-footnotes'
  :with-inlinetasks         `org-export-with-inlinetasks'
  :with-latex               `org-export-with-latex'
  :with-planning            `org-export-with-planning'
  :with-priority            `org-export-with-priority'
  :with-properties          `org-export-with-properties'
  :with-smart-quotes        `org-export-with-smart-quotes'
  :with-special-strings     `org-export-with-special-strings'
  :with-statistics-cookies' `org-export-with-statistics-cookies'
  :with-sub-superscript     `org-export-with-sub-superscripts'
  :with-toc                 `org-export-with-toc'
  :with-tables              `org-export-with-tables'
  :with-tags                `org-export-with-tags'
  :with-tasks               `org-export-with-tasks'
  :with-timestamps          `org-export-with-timestamps'
  :with-title               `org-export-with-title'
  :with-todo-keywords       `org-export-with-todo-keywords'

The following properties may be used to control publishing of
a site-map of files or summary page for a given project.

  `:auto-sitemap'

    Whether to publish a site-map during
    `org-publish-current-project' or `org-publish-all'.

  `:sitemap-filename'

    Filename for output of site-map.  Defaults to \"sitemap.org\".

  `:sitemap-title'

    Title of site-map page.  Defaults to name of file.

  `:sitemap-style'

    Can be `list' (site-map is just an itemized list of the
    titles of the files involved) or `tree' (the directory
    structure of the source files is reflected in the site-map).
    Defaults to `tree'.

  `:sitemap-format-entry'

    Plugin function used to format entries in the site-map.  It
    is called with three arguments: the file or directory name
    relative to base directory, the site map style and the
    current project.  It has to return a string.

    Defaults to `org-publish-sitemap-default-entry', which turns
    file names into links and use document titles as
    descriptions.  For specific formatting needs, one can use
    `org-publish-find-date', `org-publish-find-title' and
    `org-publish-find-property', to retrieve additional
    information about published documents.

  `:sitemap-function'

    Plugin function to use for generation of site-map.  It is
    called with two arguments: the title of the site-map, as
    a string, and a representation of the files involved in the
    project, as returned by `org-list-to-lisp'.  The latter can
    further be transformed using `org-list-to-generic',
    `org-list-to-subtree' and alike.  It has to return a string.

    Defaults to `org-publish-sitemap-default', which generates
    a plain list of links to all files in the project.

If you create a site-map file, adjust the sorting like this:

  `:sitemap-sort-folders'

    Where folders should appear in the site-map.  Set this to
    `first' or `last' to display folders first or last,
    respectively.  When set to `ignore' (default), folders are
    ignored altogether.  Any other value will mix files and
    folders.  This variable has no effect when site-map style is
    `tree'.

  `:sitemap-sort-files'

    The site map is normally sorted alphabetically.  You can
    change this behavior setting this to `anti-chronologically',
    `chronologically', or nil.

  `:sitemap-ignore-case'

    Should sorting be case-sensitive?  Default nil.

The following property control the creation of a concept index.

  `:makeindex'

    Create a concept index.  The file containing the index has to
    be called \"theindex.org\".  If it doesn't exist in the
    project, it will be generated.  Contents of the index are
    stored in the file \"theindex.inc\", which can be included in
    \"theindex.org\".

Other properties affecting publication.

  `:body-only'

    Set this to t to publish only the body of the documents."
  :group 'org-export-publish
  :type 'alist)

(defcustom org-publish-use-timestamps-flag t
  "Non-nil means use timestamp checking to publish only changed files.
When nil, do no timestamp checking and always publish all files."
  :group 'org-export-publish
  :type 'boolean)

(defcustom org-publish-timestamp-directory
  (convert-standard-filename "~/.org-timestamps/")
  "Name of directory in which to store publishing timestamps."
  :group 'org-export-publish
  :type 'directory)

(defcustom org-publish-list-skipped-files t
  "Non-nil means show message about files *not* published."
  :group 'org-export-publish
  :type 'boolean)

(defcustom org-publish-sitemap-sort-files 'alphabetically
  "Method to sort files in site-maps.
Possible values are `alphabetically', `chronologically',
`anti-chronologically' and nil.

If `alphabetically', files will be sorted alphabetically.  If
`chronologically', files will be sorted with older modification
time first.  If `anti-chronologically', files will be sorted with
newer modification time first.  nil won't sort files.

You can overwrite this default per project in your
`org-publish-project-alist', using `:sitemap-sort-files'."
  :group 'org-export-publish
  :type 'symbol)

(defcustom org-publish-sitemap-sort-folders 'ignore
  "A symbol, denoting if folders are sorted first in site-maps.

Possible values are `first', `last', `ignore' and nil.
If `first', folders will be sorted before files.
If `last', folders are sorted to the end after the files.
If `ignore', folders do not appear in the site-map.
Any other value will mix files and folders.

You can overwrite this default per project in your
`org-publish-project-alist', using `:sitemap-sort-folders'.

This variable is ignored when site-map style is `tree'."
  :group 'org-export-publish
  :type '(choice
	  (const :tag "Folders before files" first)
	  (const :tag "Folders after files" last)
	  (const :tag "No folder in site-map" ignore)
	  (const :tag "Mix folders and files" nil))
  :version "26.1"
  :package-version '(Org . "9.1")
  :safe #'symbolp)

(defcustom org-publish-sitemap-sort-ignore-case nil
  "Non-nil when site-map sorting should ignore case.

You can overwrite this default per project in your
`org-publish-project-alist', using `:sitemap-ignore-case'."
  :group 'org-export-publish
  :type 'boolean)


\f
;;; Timestamp-related functions

(defun org-publish-timestamp-filename (filename &optional pub-dir pub-func)
  "Return path to timestamp file for filename FILENAME."
  (setq filename (concat filename "::" (or pub-dir "") "::"
			 (format "%s" (or pub-func ""))))
  (concat "X" (if (fboundp 'sha1) (sha1 filename) (md5 filename))))

(defun org-publish-needed-p
  (filename &optional pub-dir pub-func _true-pub-dir base-dir)
  "Non-nil if FILENAME should be published in PUB-DIR using PUB-FUNC.
TRUE-PUB-DIR is where the file will truly end up.  Currently we
are not using this - maybe it can eventually be used to check if
the file is present at the target location, and how old it is.
Right now we cannot do this, because we do not know under what
file name the file will be stored - the publishing function can
still decide about that independently."
  (let ((rtn (if (not org-publish-use-timestamps-flag) t
	       (org-publish-cache-file-needs-publishing
		filename pub-dir pub-func base-dir))))
    (if rtn (message "Publishing file %s using `%s'" filename pub-func)
      (when org-publish-list-skipped-files
	(message "Skipping unmodified file %s" filename)))
    rtn))

(defun org-publish-update-timestamp
  (filename &optional pub-dir pub-func _base-dir)
  "Update publishing timestamp for file FILENAME.
If there is no timestamp, create one."
  (let ((key (org-publish-timestamp-filename filename pub-dir pub-func))
	(stamp (org-publish-cache-ctime-of-src filename)))
    (org-publish-cache-set key stamp)))

(defun org-publish-remove-all-timestamps ()
  "Remove all files in the timestamp directory."
  (let ((dir org-publish-timestamp-directory))
    (when (and (file-exists-p dir) (file-directory-p dir))
      (mapc #'delete-file (directory-files dir 'full "[^.]\\'"))
      (org-publish-reset-cache))))


\f
;;; Getting project information out of `org-publish-project-alist'

(defun org-publish-property (property project &optional default)
  "Return value PROPERTY, as a symbol, in PROJECT.
DEFAULT is returned when PROPERTY is not actually set in PROJECT
definition."
  (let ((properties (cdr project)))
    (if (plist-member properties property)
	(plist-get properties property)
      default)))

(defun org-publish--expand-file-name (file project)
  "Return full file name for FILE in PROJECT.
When FILE is a relative file name, it is expanded according to
project base directory."
  (if (file-name-absolute-p file) file
    (expand-file-name file (org-publish-property :base-directory project))))

(defun org-publish-expand-projects (projects-alist)
  "Expand projects in PROJECTS-ALIST.
This splices all the components into the list."
  (let ((rest projects-alist) rtn p components)
    (while (setq p (pop rest))
      (if (setq components (plist-get (cdr p) :components))
	  (setq rest (append
		      (mapcar
		       (lambda (x)
			 (or (assoc x org-publish-project-alist)
			     (user-error "Unknown component %S in project %S"
					 x (car p))))
		       components)
		      rest))
	(push p rtn)))
    (nreverse (delete-dups (delq nil rtn)))))

(defun org-publish-get-base-files (project)
  "Return a list of all files in PROJECT."
  (let* ((base-dir (file-name-as-directory
		    (org-publish-property :base-directory project)))
	 (extension (or (org-publish-property :base-extension project) "org"))
	 (match (if (eq extension 'any) ""
		  (format "^[^\\.].*\\.\\(%s\\)$" extension)))
	 (base-files
	  (cond ((not (file-exists-p base-dir)) nil)
		((not (org-publish-property :recursive project))
		 (cl-remove-if #'file-directory-p
			       (directory-files base-dir t match t)))
		(t
		 ;; Find all files recursively.  Unlike to
		 ;; `directory-files-recursively', we follow symlinks
		 ;; to other directories.
		 (letrec ((files nil)
			  (walk-tree
			   (lambda (dir depth)
			     (when (> depth 100)
			       (error "Apparent cycle of symbolic links for %S"
				      base-dir))
			     (dolist (f (file-name-all-completions "" dir))
			       (pcase f
				 ((or "./" "../") nil)
				 ((pred directory-name-p)
				  (funcall walk-tree
					   (expand-file-name f dir)
					   (1+ depth)))
				 ((pred (string-match match))
				  (push (expand-file-name f dir) files))
				 (_ nil)))
			     files)))
		   (funcall walk-tree base-dir 0))))))
    (org-uniquify
     (append
      ;; Files from BASE-DIR.  Apply exclusion filter before adding
      ;; included files.
      (let ((exclude-regexp (org-publish-property :exclude project)))
	(if exclude-regexp
	    (cl-remove-if
	     (lambda (f)
	       ;; Match against relative names, yet BASE-DIR file
	       ;; names are absolute.
	       (string-match exclude-regexp
			     (file-relative-name f base-dir)))
	     base-files)
	  base-files))
      ;; Sitemap file.
      (and (org-publish-property :auto-sitemap project)
	   (list (expand-file-name
		  (or (org-publish-property :sitemap-filename project)
		      "sitemap.org")
		  base-dir)))
      ;; Included files.
      (mapcar (lambda (f) (expand-file-name f base-dir))
	      (org-publish-property :include project))))))

(defun org-publish-get-project-from-filename (filename &optional up)
  "Return a project that FILENAME belongs to.
When UP is non-nil, return a meta-project (i.e., with a :components part)
publishing FILENAME."
  (let* ((filename (expand-file-name filename))
	 (project
	  (cl-some
	   (lambda (p)
	     ;; Ignore meta-projects.
	     (unless (org-publish-property :components p)
	       (let ((base (expand-file-name
			    (org-publish-property :base-directory p))))
		 (cond
		  ;; Check if FILENAME is explicitly included in one
		  ;; project.
		  ((cl-some (lambda (f) (file-equal-p f filename))
			    (mapcar (lambda (f) (expand-file-name f base))
				    (org-publish-property :include p)))
		   p)
		  ;; Exclude file names matching :exclude property.
		  ((let ((exclude-re (org-publish-property :exclude p)))
		     (and exclude-re
			  (string-match-p exclude-re
					  (file-relative-name filename base))))
		   nil)
		  ;; Check :extension.  Handle special `any'
		  ;; extension.
		  ((let ((extension (org-publish-property :base-extension p)))
		     (not (or (eq extension 'any)
			      (string= (or extension "org")
				       (file-name-extension filename)))))
		   nil)
		  ;; Check if FILENAME belong to project's base
		  ;; directory, or some of its sub-directories
		  ;; if :recursive in non-nil.
		  ((member filename (org-publish-get-base-files p)) p)
		  (t nil)))))
	   org-publish-project-alist)))
    (cond
     ((not project) nil)
     ((not up) project)
     ;; When optional argument UP is non-nil, return the top-most
     ;; meta-project effectively publishing FILENAME.
     (t
      (letrec ((find-parent-project
		(lambda (project)
		  (or (cl-some
		       (lambda (p)
			 (and (member (car project)
				      (org-publish-property :components p))
			      (funcall find-parent-project p)))
		       org-publish-project-alist)
		      project))))
	(funcall find-parent-project project))))))


\f
;;; Tools for publishing functions in back-ends

(defun org-publish-org-to (backend filename extension plist &optional pub-dir)
  "Publish an Org file to a specified back-end.

BACKEND is a symbol representing the back-end used for
transcoding.  FILENAME is the filename of the Org file to be
published.  EXTENSION is the extension used for the output
string, with the leading dot.  PLIST is the property list for the
given project.

Optional argument PUB-DIR, when non-nil is the publishing
directory.

Return output file name."
  (unless (or (not pub-dir) (file-exists-p pub-dir)) (make-directory pub-dir t))
  ;; Check if a buffer visiting FILENAME is already open.
  (let* ((org-inhibit-startup t)
	 (visiting (find-buffer-visiting filename))
	 (work-buffer (or visiting (find-file-noselect filename))))
    (unwind-protect
	(with-current-buffer work-buffer
	  (let ((output (org-export-output-file-name extension nil pub-dir)))
	    (org-export-to-file backend output
	      nil nil nil (plist-get plist :body-only)
	      ;; Add `org-publish--store-crossrefs' and
	      ;; `org-publish-collect-index' to final output filters.
	      ;; The latter isn't dependent on `:makeindex', since we
	      ;; want to keep it up-to-date in cache anyway.
	      (org-combine-plists
	       plist
	       `(:crossrefs
		 ,(org-publish-cache-get-file-property
		   ;; Normalize file names in cache.
		   (file-truename filename) :crossrefs nil t)
		 :filter-final-output
		 (org-publish--store-crossrefs
		  org-publish-collect-index
		  ,@(plist-get plist :filter-final-output)))))))
      ;; Remove opened buffer in the process.
      (unless visiting (kill-buffer work-buffer)))))

(defun org-publish-attachment (_plist filename pub-dir)
  "Publish a file with no transformation of any kind.

FILENAME is the filename of the Org file to be published.  PLIST
is the property list for the given project.  PUB-DIR is the
publishing directory.

Return output file name."
  (unless (file-directory-p pub-dir)
    (make-directory pub-dir t))
  (let ((output (expand-file-name (file-name-nondirectory filename) pub-dir)))
    (unless (file-equal-p (expand-file-name (file-name-directory filename))
			  (file-name-as-directory (expand-file-name pub-dir)))
      (copy-file filename output t))
    ;; Return file name.
    output))


\f
;;; Publishing files, sets of files

(defun org-publish-file (filename &optional project no-cache)
  "Publish file FILENAME from PROJECT.
If NO-CACHE is not nil, do not initialize `org-publish-cache'.
This is needed, since this function is used to publish single
files, when entire projects are published (see
`org-publish-projects')."
  (let* ((project
	  (or project
	      (org-publish-get-project-from-filename filename)
	      (user-error "File %S is not part of any known project"
			  (abbreviate-file-name filename))))
	 (project-plist (cdr project))
	 (publishing-function
	  (pcase (org-publish-property :publishing-function project)
	    (`nil (user-error "No publishing function chosen"))
	    ((and f (pred listp)) f)
	    (f (list f))))
	 (base-dir
	  (file-name-as-directory
	   (or (org-publish-property :base-directory project)
	       (user-error "Project %S does not have :base-directory defined"
			   (car project)))))
	 (pub-base-dir
	  (file-name-as-directory
	   (or (org-publish-property :publishing-directory project)
	       (user-error
		"Project %S does not have :publishing-directory defined"
		(car project)))))
	 (pub-dir
	  (file-name-directory
	   (expand-file-name (file-relative-name filename base-dir)
			     pub-base-dir))))

    (unless no-cache (org-publish-initialize-cache (car project)))

    ;; Allow chain of publishing functions.
    (dolist (f publishing-function)
      (when (org-publish-needed-p filename pub-base-dir f pub-dir base-dir)
	(let ((output (funcall f project-plist filename pub-dir)))
	  (org-publish-update-timestamp filename pub-base-dir f base-dir)
	  (run-hook-with-args 'org-publish-after-publishing-hook
			      filename
			      output))))
    ;; Make sure to write cache to file after successfully publishing
    ;; a file, so as to minimize impact of a publishing failure.
    (org-publish-write-cache-file)))

(defun org-publish-projects (projects)
  "Publish all files belonging to the PROJECTS alist.
If `:auto-sitemap' is set, publish the sitemap too.  If
`:makeindex' is set, also produce a file \"theindex.org\"."
  (dolist (project (org-publish-expand-projects projects))
    (let ((plist (cdr project)))
      (let ((fun (org-publish-property :preparation-function project)))
	(cond
	 ((consp fun) (dolist (f fun) (funcall f plist)))
	 ((functionp fun) (funcall fun plist))))
      ;; Each project uses its own cache file.
      (org-publish-initialize-cache (car project))
      (when (org-publish-property :auto-sitemap project)
	(let ((sitemap-filename
	       (or (org-publish-property :sitemap-filename project)
		   "sitemap.org")))
	  (org-publish-sitemap project sitemap-filename)))
      ;; Publish all files from PROJECT except "theindex.org".  Its
      ;; publishing will be deferred until "theindex.inc" is
      ;; populated.
      (let ((theindex
	     (expand-file-name "theindex.org"
			       (org-publish-property :base-directory project))))
	(dolist (file (org-publish-get-base-files project))
	  (unless (file-equal-p file theindex)
	    (org-publish-file file project t)))
	;; Populate "theindex.inc", if needed, and publish
	;; "theindex.org".
	(when (org-publish-property :makeindex project)
	  (org-publish-index-generate-theindex
	   project (org-publish-property :base-directory project))
	  (org-publish-file theindex project t)))
      (let ((fun (org-publish-property :completion-function project)))
	(cond
	 ((consp fun) (dolist (f fun) (funcall f plist)))
	 ((functionp fun) (funcall fun plist)))))
    (org-publish-write-cache-file)))

\f
;;; Site map generation

(defun org-publish--sitemap-files-to-lisp (files project style format-entry)
  "Represent FILES as a parsed plain list.
FILES is the list of files in the site map.  PROJECT is the
current project.  STYLE determines is either `list' or `tree'.
FORMAT-ENTRY is a function called on each file which should
return a string.  Return value is a list as returned by
`org-list-to-lisp'."
  (let ((root (expand-file-name
	       (file-name-as-directory
		(org-publish-property :base-directory project)))))
    (pcase style
      (`list
       (cons 'unordered
	     (mapcar
	      (lambda (f)
		(list (funcall format-entry
			       (file-relative-name f root)
			       style
			       project)))
	      files)))
      (`tree
       (letrec ((files-only (cl-remove-if #'directory-name-p files))
		(directories (cl-remove-if-not #'directory-name-p files))
		(subtree-to-list
		 (lambda (dir)
		   (cons 'unordered
			 (nconc
			  ;; Files in DIR.
			  (mapcar
			   (lambda (f)
			     (list (funcall format-entry
					    (file-relative-name f root)
					    style
					    project)))
			   (cl-remove-if-not
			    (lambda (f) (string= dir (file-name-directory f)))
			    files-only))
			  ;; Direct sub-directories.
			  (mapcar
			   (lambda (sub)
			     (list (funcall format-entry
					    (file-relative-name sub root)
					    style
					    project)
				   (funcall subtree-to-list sub)))
			   (cl-remove-if-not
			    (lambda (f)
			      (string=
			       dir
			       ;; Parent directory.
			       (file-name-directory (directory-file-name f))))
			    directories)))))))
	 (funcall subtree-to-list root)))
      (_ (user-error "Unknown site-map style: `%s'" style)))))

(defun org-publish-sitemap (project &optional sitemap-filename)
  "Create a sitemap of pages in set defined by PROJECT.
Optionally set the filename of the sitemap with SITEMAP-FILENAME.
Default for SITEMAP-FILENAME is `sitemap.org'."
  (let* ((root (expand-file-name
		(file-name-as-directory
		 (org-publish-property :base-directory project))))
	 (sitemap-filename (concat root (or sitemap-filename "sitemap.org")))
	 (title (or (org-publish-property :sitemap-title project)
		    (concat "Sitemap for project " (car project))))
	 (style (or (org-publish-property :sitemap-style project)
		    'tree))
	 (sitemap-builder (or (org-publish-property :sitemap-function project)
			      #'org-publish-sitemap-default))
	 (format-entry (or (org-publish-property :sitemap-format-entry project)
			   #'org-publish-sitemap-default-entry))
	 (sort-folders
	  (org-publish-property :sitemap-sort-folders project
				org-publish-sitemap-sort-folders))
	 (sort-files
	  (org-publish-property :sitemap-sort-files project
				org-publish-sitemap-sort-files))
	 (ignore-case
	  (org-publish-property :sitemap-ignore-case project
				org-publish-sitemap-sort-ignore-case))
	 (org-file-p (lambda (f) (equal "org" (file-name-extension f))))
	 (sort-predicate
	  (lambda (a b)
	    (let ((retval t))
	      ;; First we sort files:
	      (pcase sort-files
		(`alphabetically
		 (let ((A (if (funcall org-file-p a)
			      (concat (file-name-directory a)
				      (org-publish-find-title a project))
			    a))
		       (B (if (funcall org-file-p b)
			      (concat (file-name-directory b)
				      (org-publish-find-title b project))
			    b)))
		   (setq retval
			 (if ignore-case
			     (not (string-lessp (upcase B) (upcase A)))
			   (not (string-lessp B A))))))
		((or `anti-chronologically `chronologically)
		 (let* ((adate (org-publish-find-date a project))
			(bdate (org-publish-find-date b project)))
		   (setq retval
			 (not (if (eq sort-files 'chronologically)
				  (time-less-p bdate adate)
				(time-less-p adate bdate))))))
		(`nil nil)
		(_ (user-error "Invalid sort value %s" sort-files)))
	      ;; Directory-wise wins:
	      (when (memq sort-folders '(first last))
		;; a is directory, b not:
		(cond
		 ((and (file-directory-p a) (not (file-directory-p b)))
		  (setq retval (eq sort-folders 'first)))
		 ;; a is not a directory, but b is:
		 ((and (not (file-directory-p a)) (file-directory-p b))
		  (setq retval (eq sort-folders 'last)))))
	      retval))))
    (message "Generating sitemap for %s" title)
    (with-temp-file sitemap-filename
      (insert
       (let ((files (remove sitemap-filename
			    (org-publish-get-base-files project))))
	 ;; Add directories, if applicable.
	 (unless (and (eq style 'list) (eq sort-folders 'ignore))
	   (setq files
		 (nconc (remove root (org-uniquify
				      (mapcar #'file-name-directory files)))
			files)))
	 ;; Eventually sort all entries.
	 (when (or sort-files (not (memq sort-folders 'ignore)))
	   (setq files (sort files sort-predicate)))
	 (funcall sitemap-builder
		  title
		  (org-publish--sitemap-files-to-lisp
		   files project style format-entry)))))))

(defun org-publish-find-property (file property project &optional backend)
  "Find the PROPERTY of FILE in project.

PROPERTY is a keyword referring to an export option, as defined
in `org-export-options-alist' or in export back-ends.  In the
latter case, optional argument BACKEND has to be set to the
back-end where the option is defined, e.g.,

  (org-publish-find-property file :subtitle 'latex)

Return value may be a string or a list, depending on the type of
PROPERTY, i.e. \"behavior\" parameter from `org-export-options-alist'."
  (let ((file (org-publish--expand-file-name file project)))
    (when (and (file-readable-p file) (not (directory-name-p file)))
      (let* ((org-inhibit-startup t)
	     (visiting (find-buffer-visiting file))
	     (buffer (or visiting (find-file-noselect file))))
	(unwind-protect
	    (plist-get (with-current-buffer buffer
			 (if (not visiting) (org-export-get-environment backend)
			   ;; Protect local variables in open buffers.
			   (org-export-with-buffer-copy
			    (org-export-get-environment backend))))
		       property)
	  (unless visiting (kill-buffer buffer)))))))

(defun org-publish-find-title (file project)
  "Find the title of FILE in PROJECT."
  (let ((file (org-publish--expand-file-name file project)))
    (or (org-publish-cache-get-file-property file :title nil t)
	(let* ((parsed-title (org-publish-find-property file :title project))
	       (title
		(if parsed-title
		    ;; Remove property so that the return value is
		    ;; cache-able (i.e., it can be `read' back).
		    (org-no-properties
		     (org-element-interpret-data parsed-title))
		  (file-name-nondirectory (file-name-sans-extension file)))))
	  (org-publish-cache-set-file-property file :title title)
	  title))))

(defun org-publish-find-date (file project)
  "Find the date of FILE in PROJECT.
This function assumes FILE is either a directory or an Org file.
If FILE is an Org file and provides a DATE keyword use it.  In
any other case use the file system's modification time.  Return
time in `current-time' format."
  (let ((file (org-publish--expand-file-name file project)))
    (if (file-directory-p file) (file-attribute-modification-time
                                 (file-attributes file))
      (let ((date (org-publish-find-property file :date project)))
	;; DATE is a secondary string.  If it contains a time-stamp,
	;; convert it to internal format.  Otherwise, use FILE
	;; modification time.
	(cond ((let ((ts (and (consp date) (assq 'timestamp date))))
		 (and ts
		      (let ((value (org-element-interpret-data ts)))
			(and (org-string-nw-p value)
			     (org-time-string-to-time value))))))
	      ((file-exists-p file) (file-attribute-modification-time
                                     (file-attributes file)))
	      (t (error "No such file: \"%s\"" file)))))))

(defun org-publish-sitemap-default-entry (entry style project)
  "Default format for site map ENTRY, as a string.
ENTRY is a file name.  STYLE is the style of the sitemap.
PROJECT is the current project."
  (cond ((not (directory-name-p entry))
	 (format "[[file:%s][%s]]"
		 entry
		 (org-publish-find-title entry project)))
	((eq style 'tree)
	 ;; Return only last subdir.
	 (file-name-nondirectory (directory-file-name entry)))
	(t entry)))

(defun org-publish-sitemap-default (title list)
  "Default site map, as a string.
TITLE is the the title of the site map.  LIST is an internal
representation for the files to include, as returned by
`org-list-to-lisp'.  PROJECT is the current project."
  (concat "#+TITLE: " title "\n\n"
	  (org-list-to-org list)))

\f
;;; Interactive publishing functions

;;;###autoload
(defalias 'org-publish-project 'org-publish)

;;;###autoload
(defun org-publish (project &optional force async)
  "Publish PROJECT.

PROJECT is either a project name, as a string, or a project
alist (see `org-publish-project-alist' variable).

When optional argument FORCE is non-nil, force publishing all
files in PROJECT.  With a non-nil optional argument ASYNC,
publishing will be done asynchronously, in another process."
  (interactive
   (list (assoc (completing-read "Publish project: "
				 org-publish-project-alist nil t)
		org-publish-project-alist)
	 current-prefix-arg))
  (let ((project (if (not (stringp project)) project
		   ;; If this function is called in batch mode,
		   ;; PROJECT is still a string here.
		   (assoc project org-publish-project-alist))))
    (cond
     ((not project))
     (async
      (org-export-async-start (lambda (_) nil)
	`(let ((org-publish-use-timestamps-flag
		,(and (not force) org-publish-use-timestamps-flag)))
	   ;; Expand components right now as external process may not
	   ;; be aware of complete `org-publish-project-alist'.
	   (org-publish-projects
	    ',(org-publish-expand-projects (list project))))))
     (t (save-window-excursion
	  (let ((org-publish-use-timestamps-flag
		 (and (not force) org-publish-use-timestamps-flag)))
	    (org-publish-projects (list project))))))))

;;;###autoload
(defun org-publish-all (&optional force async)
  "Publish all projects.
With prefix argument FORCE, remove all files in the timestamp
directory and force publishing all projects.  With a non-nil
optional argument ASYNC, publishing will be done asynchronously,
in another process."
  (interactive "P")
  (if async
      (org-export-async-start (lambda (_) nil)
	`(progn
	   (when ',force (org-publish-remove-all-timestamps))
	   (let ((org-publish-use-timestamps-flag
		  (if ',force nil ,org-publish-use-timestamps-flag)))
	     (org-publish-projects ',org-publish-project-alist))))
    (when force (org-publish-remove-all-timestamps))
    (save-window-excursion
      (let ((org-publish-use-timestamps-flag
	     (if force nil org-publish-use-timestamps-flag)))
	(org-publish-projects org-publish-project-alist)))))


;;;###autoload
(defun org-publish-current-file (&optional force async)
  "Publish the current file.
With prefix argument FORCE, force publish the file.  When
optional argument ASYNC is non-nil, publishing will be done
asynchronously, in another process."
  (interactive "P")
  (let ((file (buffer-file-name (buffer-base-buffer))))
    (if async
	(org-export-async-start (lambda (_) nil)
	  `(let ((org-publish-use-timestamps-flag
		  (if ',force nil ,org-publish-use-timestamps-flag)))
	     (org-publish-file ,file)))
      (save-window-excursion
	(let ((org-publish-use-timestamps-flag
	       (if force nil org-publish-use-timestamps-flag)))
	  (org-publish-file file))))))

;;;###autoload
(defun org-publish-current-project (&optional force async)
  "Publish the project associated with the current file.
With a prefix argument, force publishing of all files in
the project."
  (interactive "P")
  (save-window-excursion
    (let ((project (org-publish-get-project-from-filename
		    (buffer-file-name (buffer-base-buffer)) 'up)))
      (if project (org-publish project force async)
	(error "File %s is not part of any known project"
	       (buffer-file-name (buffer-base-buffer)))))))


\f
;;; Index generation

(defun org-publish-collect-index (output _backend info)
  "Update index for a file in cache.

OUTPUT is the output from transcoding current file.  BACKEND is
the back-end that was used for transcoding.  INFO is a plist
containing publishing and export options.

The index relative to current file is stored as an alist.  An
association has the following shape: (TERM FILE-NAME PARENT),
where TERM is the indexed term, as a string, FILE-NAME is the
original full path of the file where the term in encountered, and
PARENT is a reference to the headline, if any, containing the
original index keyword.  When non-nil, this reference is a cons
cell.  Its CAR is a symbol among `id', `custom-id' and `name' and
its CDR is a string."
  (let ((file (file-truename (plist-get info :input-file))))
    (org-publish-cache-set-file-property
     file :index
     (delete-dups
      (org-element-map (plist-get info :parse-tree) 'keyword
	(lambda (k)
	  (when (equal (org-element-property :key k) "INDEX")
	    (let ((parent (org-export-get-parent-headline k)))
	      (list (org-element-property :value k)
		    file
		    (cond
		     ((not parent) nil)
		     ((let ((id (org-element-property :ID parent)))
			(and id (cons 'id id))))
		     ((let ((id (org-element-property :CUSTOM_ID parent)))
			(and id (cons 'custom-id id))))
		     (t (cons 'name
			      ;; Remove statistics cookie.
			      (replace-regexp-in-string
			       "\\[[0-9]+%\\]\\|\\[[0-9]+/[0-9]+\\]" ""
			       (org-element-property :raw-value parent)))))))))
	info))))
  ;; Return output unchanged.
  output)

(defun org-publish-index-generate-theindex (project directory)
  "Retrieve full index from cache and build \"theindex.org\".
PROJECT is the project the index relates to.  DIRECTORY is the
publishing directory."
  (let ((all-files (org-publish-get-base-files project))
	full-index)
    ;; Compile full index and sort it alphabetically.
    (dolist (file all-files
		  (setq full-index
			(sort (nreverse full-index)
			      (lambda (a b) (string< (downcase (car a))
						(downcase (car b)))))))
      (let ((index (org-publish-cache-get-file-property file :index)))
	(dolist (term index)
	  (unless (member term full-index) (push term full-index)))))
    ;; Write "theindex.inc" in DIRECTORY.
    (with-temp-file (expand-file-name "theindex.inc" directory)
      (let ((current-letter nil) (last-entry nil))
	(dolist (idx full-index)
	  (let* ((entry (org-split-string (car idx) "!"))
		 (letter (upcase (substring (car entry) 0 1)))
		 ;; Transform file into a path relative to publishing
		 ;; directory.
		 (file (file-relative-name
			(nth 1 idx)
			(plist-get (cdr project) :base-directory))))
	    ;; Check if another letter has to be inserted.
	    (unless (string= letter current-letter)
	      (insert (format "* %s\n" letter)))
	    ;; Compute the first difference between last entry and
	    ;; current one: it tells the level at which new items
	    ;; should be added.
	    (let* ((rank
		    (if (equal entry last-entry) (1- (length entry))
		      (cl-loop for n from 0 to (length entry)
			       unless (equal (nth n entry) (nth n last-entry))
			       return n)))
		   (len (length (nthcdr rank entry))))
	      ;; For each term after the first difference, create
	      ;; a new sub-list with the term as body.  Moreover,
	      ;; linkify the last term.
	      (dotimes (n len)
		(insert
		 (concat
		  (make-string (* (+ rank n) 2) ?\s) "  - "
		  (if (not (= (1- len) n)) (nth (+ rank n) entry)
		    ;; Last term: Link it to TARGET, if possible.
		    (let ((target (nth 2 idx)))
		      (format
		       "[[%s][%s]]"
		       ;; Destination.
		       (pcase (car target)
			 (`nil (format "file:%s" file))
			 (`id (format "id:%s" (cdr target)))
			 (`custom-id (format "file:%s::#%s" file (cdr target)))
			 (_ (format "file:%s::*%s" file (cdr target))))
		       ;; Description.
		       (car (last entry)))))
		  "\n"))))
	    (setq current-letter letter last-entry entry))))
      ;; Create "theindex.org", if it doesn't exist yet, and provide
      ;; a default index file.
      (let ((index.org (expand-file-name "theindex.org" directory)))
	(unless (file-exists-p index.org)
	  (with-temp-file index.org
	    (insert "#+TITLE: Index\n\n#+INCLUDE: \"theindex.inc\"\n\n")))))))


\f
;;; External Fuzzy Links Resolution
;;
;; This part implements tools to resolve [[file.org::*Some headline]]
;; links, where "file.org" belongs to the current project.

(defun org-publish--store-crossrefs (output _backend info)
  "Store cross-references for current published file.

OUTPUT is the produced output, as a string.  BACKEND is the export
back-end used, as a symbol.  INFO is the final export state, as
a plist.

This function is meant to be used as a final output filter.  See
`org-publish-org-to'."
  (org-publish-cache-set-file-property
   (file-truename (plist-get info :input-file))
   :crossrefs
   ;; Update `:crossrefs' so as to remove unused references and search
   ;; cells.  Actually used references are extracted from
   ;; `:internal-references', with references as strings removed.  See
   ;; `org-export-get-reference' for details.
   (cl-remove-if (lambda (pair) (stringp (car pair)))
		 (plist-get info :internal-references)))
  ;; Return output unchanged.
  output)

(defun org-publish-resolve-external-link (search file)
  "Return reference for element matching string SEARCH in FILE.

Return value is an internal reference, as a string.

This function allows resolving external links with a search
option, e.g.,

  [[file.org::*heading][description]]
  [[file.org::#custom-id][description]]
  [[file.org::fuzzy][description]]

It only makes sense to use this if export back-end builds
references with `org-export-get-reference'."
  (if (not org-publish-cache)
      (progn
	(message "Reference %S in file %S cannot be resolved without publishing"
		 search
		 file)
	"MissingReference")
    (let* ((filename (file-truename file))
	   (crossrefs
	    (org-publish-cache-get-file-property filename :crossrefs nil t))
	   (cells
	    (org-export-string-to-search-cell (org-link-unescape search))))
      (or
       ;; Look for reference associated to search cells triggered by
       ;; LINK.  It can match when targeted file has been published
       ;; already.
       (let ((known (cdr (cl-some (lambda (c) (assoc c crossrefs)) cells))))
	 (and known (org-export-format-reference known)))
       ;; Search cell is unknown so far.  Generate a new internal
       ;; reference that will be used when the targeted file will be
       ;; published.
       (let ((new (org-export-new-reference crossrefs)))
	 (dolist (cell cells) (push (cons cell new) crossrefs))
	 (org-publish-cache-set-file-property filename :crossrefs crossrefs)
	 (org-export-format-reference new))))))

(defun org-publish-file-relative-name (filename info)
  "Convert FILENAME to be relative to current project's base directory.
INFO is the plist containing the current export state.  The
function does not change relative file names."
  (let ((base (plist-get info :base-directory)))
    (if (and base
	     (file-name-absolute-p filename)
	     (file-in-directory-p filename base))
	(file-relative-name filename base)
      filename)))


\f
;;; Caching functions

(defun org-publish-write-cache-file (&optional free-cache)
  "Write `org-publish-cache' to file.
If FREE-CACHE, empty the cache."
  (unless org-publish-cache
    (error "`org-publish-write-cache-file' called, but no cache present"))

  (let ((cache-file (org-publish-cache-get ":cache-file:")))
    (unless cache-file
      (error "Cannot find cache-file name in `org-publish-write-cache-file'"))
    (with-temp-file cache-file
      (let (print-level print-length)
	(insert "(setq org-publish-cache \
\(make-hash-table :test 'equal :weakness nil :size 100))\n")
	(maphash (lambda (k v)
		   (insert
		    (format "(puthash %S %s%S org-publish-cache)\n"
			    k (if (or (listp v) (symbolp v)) "'" "") v)))
		 org-publish-cache)))
    (when free-cache (org-publish-reset-cache))))

(defun org-publish-initialize-cache (project-name)
  "Initialize the projects cache if not initialized yet and return it."

  (unless project-name
    (error "Cannot initialize `org-publish-cache' without projects name in \
`org-publish-initialize-cache'"))

  (unless (file-exists-p org-publish-timestamp-directory)
    (make-directory org-publish-timestamp-directory t))
  (unless (file-directory-p org-publish-timestamp-directory)
    (error "Org publish timestamp: %s is not a directory"
	   org-publish-timestamp-directory))

  (unless (and org-publish-cache
	       (string= (org-publish-cache-get ":project:") project-name))
    (let* ((cache-file
	    (concat
	     (expand-file-name org-publish-timestamp-directory)
	     project-name ".cache"))
	   (cexists (file-exists-p cache-file)))

      (when org-publish-cache (org-publish-reset-cache))

      (if cexists (load-file cache-file)
	(setq org-publish-cache
	      (make-hash-table :test 'equal :weakness nil :size 100))
	(org-publish-cache-set ":project:" project-name)
	(org-publish-cache-set ":cache-file:" cache-file))
      (unless cexists (org-publish-write-cache-file nil))))
  org-publish-cache)

(defun org-publish-reset-cache ()
  "Empty org-publish-cache and reset it nil."
  (message "%s" "Resetting org-publish-cache")
  (when (hash-table-p org-publish-cache)
    (clrhash org-publish-cache))
  (setq org-publish-cache nil))

(defun org-publish-cache-file-needs-publishing
    (filename &optional pub-dir pub-func _base-dir)
  "Check the timestamp of the last publishing of FILENAME.
Return non-nil if the file needs publishing.  Also check if
any included files have been more recently published, so that
the file including them will be republished as well."
  (unless org-publish-cache
    (error
     "`org-publish-cache-file-needs-publishing' called, but no cache present"))
  (let* ((key (org-publish-timestamp-filename filename pub-dir pub-func))
	 (pstamp (org-publish-cache-get key))
	 (org-inhibit-startup t)
	 included-files-ctime)
    (when (equal (file-name-extension filename) "org")
      (let ((visiting (find-buffer-visiting filename))
	    (buf (find-file-noselect filename))
	    (case-fold-search t))
	(unwind-protect
	    (with-current-buffer buf
	      (goto-char (point-min))
	      (while (re-search-forward "^[ \t]*#\\+INCLUDE:" nil t)
		(let ((element (org-element-at-point)))
		  (when (eq 'keyword (org-element-type element))
		    (let* ((value (org-element-property :value element))
			   (filename
			    (and (string-match "\\`\\(\".+?\"\\|\\S-+\\)" value)
				 (let ((m (org-unbracket-string
					   "\"" "\"" (match-string 1 value))))
				   ;; Ignore search suffix.
				   (if (string-match "::.*?\\'" m)
				       (substring m 0 (match-beginning 0))
				     m)))))
		      (when filename
			(push (org-publish-cache-ctime-of-src
			       (expand-file-name filename))
			      included-files-ctime)))))))
	  (unless visiting (kill-buffer buf)))))
    (or (null pstamp)
	(let ((ctime (org-publish-cache-ctime-of-src filename)))
	  (or (< pstamp ctime)
	      (cl-some (lambda (ct) (< ctime ct)) included-files-ctime))))))

(defun org-publish-cache-set-file-property
  (filename property value &optional project-name)
  "Set the VALUE for a PROPERTY of file FILENAME in publishing cache to VALUE.
Use cache file of PROJECT-NAME.  If the entry does not exist, it
will be created.  Return VALUE."
  ;; Evtl. load the requested cache file:
  (if project-name (org-publish-initialize-cache project-name))
  (let ((pl (org-publish-cache-get filename)))
    (if pl (progn (plist-put pl property value) value)
      (org-publish-cache-get-file-property
       filename property value nil project-name))))

(defun org-publish-cache-get-file-property
    (filename property &optional default no-create project-name)
  "Return the value for a PROPERTY of file FILENAME in publishing cache.
Use cache file of PROJECT-NAME.  Return the value of that PROPERTY,
or DEFAULT, if the value does not yet exist.  Create the entry,
if necessary, unless NO-CREATE is non-nil."
  (when project-name (org-publish-initialize-cache project-name))
  (let ((properties (org-publish-cache-get filename)))
    (cond ((null properties)
	   (unless no-create
	     (org-publish-cache-set filename (list property default)))
	   default)
	  ((plist-member properties property) (plist-get properties property))
	  (t default))))

(defun org-publish-cache-get (key)
  "Return the value stored in `org-publish-cache' for key KEY.
Return nil, if no value or nil is found.  Raise an error if the
cache does not exist."
  (unless org-publish-cache
    (error "`org-publish-cache-get' called, but no cache present"))
  (gethash key org-publish-cache))

(defun org-publish-cache-set (key value)
  "Store KEY VALUE pair in `org-publish-cache'.
Returns value on success, else nil.  Raise an error if the cache
does not exist."
  (unless org-publish-cache
    (error "`org-publish-cache-set' called, but no cache present"))
  (puthash key value org-publish-cache))

(defun org-publish-cache-ctime-of-src (file)
  "Get the ctime of FILE as an integer."
  (let ((attr (file-attributes
	       (expand-file-name (or (file-symlink-p file) file)
				 (file-name-directory file)))))
    (if (not attr) (error "No such file: \"%s\"" file)
      (encode-time (file-attribute-modification-time attr) 'integer))))


(provide 'ox-publish)

;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:

;;; ox-publish.el ends here

debug log:

solving 74312bc20f ...
found 74312bc20f in https://git.savannah.gnu.org/cgit/emacs.git

(*) 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 public inbox

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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).