aboutsummaryrefslogtreecommitdiff
path: root/cgitrc.5.txt
blob: e21ece9fd30263b6f8244cf4d86c7a675d0024d8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
:man source:   cgit
:man manual:   cgit

CGITRC(5)
========


NAME
----
cgitrc - runtime configuration for cgit


SYNOPSIS
--------
Cgitrc contains all runtime settings for cgit, including the list of git
repositories, formatted as a line-separated list of NAME=VALUE pairs. Blank
lines, and lines starting with '#', are ignored.


LOCATION
--------
The default location of cgitrc, defined at compile time, is /etc/cgitrc. At
runtime, cgit will consult the environment variable CGIT_CONFIG and, if
defined, use its value instead.


GLOBAL SETTINGS
---------------
about-filter::
	Specifies a command which will be invoked to format the content of
	about pages (both top-level and for each repository). The command will
	get the content of the about-file on its STDIN, the name of the file
	as the first argument, and the STDOUT from the command will be
	included verbatim on the about page. Default value: none. See
	also: "FILTER API".

agefile::
	Specifies a path, relative to each repository path, which can be used
	to specify the date and time of the youngest commit in the repository.
	The first line in the file is used as input to the "parse_date"
	function in libgit. Recommended timestamp-format is "yyyy-mm-dd
	hh:mm:ss". You may want to generate this file from a post-receive
	hook. Default value: "info/web/last-modified".

auth-filter::
	Specifies a command that will be invoked for authenticating repository
	access. Receives quite a few arguments, and data on both stdin and
	stdout for authentication processing. Details follow later in this
	document. If no auth-filter is specified, no authentication is
	performed. Default value: none. See also: "FILTER API".

branch-sort::
	Flag which, when set to "age", enables date ordering in the branch ref
	list, and when set to "name" enables ordering by branch name. Default
	value: "name".

cache-root::
	Path used to store the cgit cache entries. Default value:
	"/var/cache/cgit". See also: "MACRO EXPANSION".

cache-static-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of repository pages accessed with a fixed SHA1. See also:
	"CACHE". Default value: -1".

cache-dynamic-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of repository pages accessed without a fixed SHA1. See also:
	"CACHE". Default value: "5".

cache-repo-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of the repository summary page. See also: "CACHE". Default
	value: "5".

cache-root-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of the repository index page. See also: "CACHE". Default
	value: "5".

cache-scanrc-ttl::
	Number which specifies the time-to-live, in minutes, for the result
	of scanning a path for git repositories. See also: "CACHE". Default
	value: "15".

cache-about-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of the repository about page. See also: "CACHE". Default
	value: "15".

cache-snapshot-ttl::
	Number which specifies the time-to-live, in minutes, for the cached
	version of snapshots. See also: "CACHE". Default value: "5".

cache-size::
	The maximum number of entries in the cgit cache. When set to "0",
	caching is disabled. See also: "CACHE". Default value: "0"

case-sensitive-sort::
	Sort items in the repo list case sensitively. Default value: "1".
	See also: repository-sort, section-sort.

clone-prefix::
	Space-separated list of common prefixes which, when combined with a
	repository url, generates valid clone urls for the repository. This
	setting is only used if `repo.clone-url` is unspecified. Default value:
	none.

clone-url::
	Space-separated list of clone-url templates. This setting is only
	used if `repo.clone-url` is unspecified. Default value: none. See
	also: "MACRO EXPANSION", "FILTER API".

commit-filter::
	Specifies a command which will be invoked to format commit messages.
	The command will get the message on its STDIN, and the STDOUT from the
	command will be included verbatim as the commit message, i.e. this can
	be used to implement bugtracker integration. Default value: none.
	See also: "FILTER API".

commit-sort::
	Flag which, when set to "date", enables strict date ordering in the
	commit log, and when set to "topo" enables strict topological
	ordering. If unset, the default ordering of "git log" is used. Default
	value: unset.

css::
	Url which specifies the css document to include in all cgit pages.
	Default value: "/cgit.css".

email-filter::
	Specifies a command which will be invoked to format names and email
	address of committers, authors, and taggers, as represented in various
	places throughout the cgit interface. This command will receive an
	email address and an origin page string as its command line arguments,
	and the text to format on STDIN. It is to write the formatted text back
	out onto STDOUT. Default value: none. See also: "FILTER API".

embedded::
	Flag which, when set to "1", will make cgit generate a html fragment
	suitable for embedding in other html pages. Default value: none. See
	also: "noheader".

enable-commit-graph::
	Flag which, when set to "1", will make cgit print an ASCII-art commit
	history graph to the left of the commit messages in the repository
	log page. Default value: "0".

enable-filter-overrides::
	Flag which, when set to "1", allows all filter settings to be
	overridden in repository-specific cgitrc files. Default value: none.

enable-http-clone::
	If set to "1", cgit will act as an dumb HTTP endpoint for git clones.
	You can add "http://$HTTP_HOST$SCRIPT_NAME/$CGIT_REPO_URL" to clone-url
	to expose this feature. If you use an alternate way of serving git
	repositories, you may wish to disable this. Default value: "1".

enable-index-links::
	Flag which, when set to "1", will make cgit generate extra links for
	each repo in the repository index (specifically, to the "summary",
	"commit" and "tree" pages). Default value: "0".

enable-index-owner::
	Flag which, when set to "1", will make cgit display the owner of
	each repo in the repository index. Default value: "1".

enable-log-filecount::
	Flag which, when set to "1", will make cgit print the number of
	modified files for each commit on the repository log page. Default
	value: "0".

enable-log-linecount::
	Flag which, when set to "1", will make cgit print the number of added
	and removed lines for each commit on the repository log page. Default
	value: "0".

enable-remote-branches::
	Flag which, when set to "1", will make cgit display remote branches
	in the summary and refs views. Default value: "0". See also:
	"repo.enable-remote-branches".

enable-subject-links::
	Flag which, when set to "1", will make cgit use the subject of the
	parent commit as link text when generating links to parent commits
	in commit view. Default value: "0". See also:
	"repo.enable-subject-links".

enable-tree-linenumbers::
	Flag which, when set to "1", will make cgit generate linenumber links
	for plaintext blobs printed in the tree view. Default value: "1".

enable-git-config::
	Flag which, when set to "1", will allow cgit to use git config to set
	any repo specific settings. This option is used in conjunction with
	"scan-path", and must be defined prior, to augment repo-specific
	settings. The keys gitweb.owner, gitweb.category, and gitweb.description
	will map to the cgit keys repo.owner, repo.section, and repo.desc,
	respectively. All git config keys that begin with "cgit." will be mapped
	to the corresponding "repo." key in cgit. Default value: "0". See also:
	scan-path, section-from-path.

favicon::
	Url used as link to a shortcut icon for cgit. It is suggested to use
	the value "/favicon.ico" since certain browsers will ignore other
	values. Default value: "/favicon.ico".

footer::
	The content of the file specified with this option will be included
	verbatim at the bottom of all pages (i.e. it replaces the standard
	"generated by..." message. Default value: none.

head-include::
	The content of the file specified with this option will be included
	verbatim in the html HEAD section on all pages. Default value: none.

header::
	The content of the file specified with this option will be included
	verbatim at the top of all pages. Default value: none.

include::
	Name of a configfile to include before the rest of the current config-
	file is parsed. Default value: none. See also: "MACRO EXPANSION".

index-header::
	The content of the file specified with this option will be included
	verbatim above the repository index. This setting is deprecated, and
	will not be supported by cgit-1.0 (use root-readme instead). Default
	value: none.

index-info::
	The content of the file specified with this option will be included
	verbatim below the heading on the repository index page. This setting
	is deprecated, and will not be supported by cgit-1.0 (use root-desc
	instead). Default value: none.

local-time::
	Flag which, if set to "1", makes cgit print commit and tag times in the
	servers timezone. Default value: "0".

logo::
	Url which specifies the source of an image which will be used as a logo
	on all cgit pages. Default value: "/cgit.png".

logo-link::
	Url loaded when clicking on the cgit logo image. If unspecified the
	calculated url of the repository index page will be used. Default
	value: none.

owner-filter::
	Specifies a command which will be invoked to format the Owner
	column of the main page.  The command will get the owner on STDIN,
	and the STDOUT from the command will be included verbatim in the
	table.  This can be used to link to additional context such as an
	owners home page.  When active this filter is used instead of the
	default owner query url.  Default value: none.
	See also: "FILTER API".

max-atom-items::
	Specifies the number of items to display in atom feeds view. Default
	value: "10".

max-commit-count::
	Specifies the number of entries to list per page in "log" view. Default
	value: "50".

max-message-length::
	Specifies the maximum number of commit message characters to display in
	"log" view. Default value: "80".

max-repo-count::
	Specifies the number of entries to list per page on the	repository
	index page. Default value: "50".

max-repodesc-length::
	Specifies the maximum number of repo description characters to display
	on the repository index page. Default value: "80".

max-blob-size::
	Specifies the maximum size of a blob to display HTML for in KBytes.
	Default value: "0" (limit disabled).

max-stats::
	Set the default maximum statistics period. Valid values are "week",
	"month", "quarter" and "year". If unspecified, statistics are
	disabled. Default value: none. See also: "repo.max-stats".

mimetype.<ext>::
	Set the mimetype for the specified filename extension. This is used
	by the `plain` command when returning blob content.

mimetype-file::
	Specifies the file to use for automatic mimetype lookup. If specified
	then this field is used as a fallback when no "mimetype.<ext>" match is
	found. If unspecified then no such lookup is performed. The typical file
	to use on a Linux system is /etc/mime.types. The format of the file must
	comply to:
	- a comment line is an empty line or a line starting with a hash (#),
	  optionally preceded by whitespace
	- a non-comment line starts with the mimetype (like image/png), followed
	  by one or more file extensions (like jpg), all separated by whitespace
	Default value: none. See also: "mimetype.<ext>".

module-link::
	Text which will be used as the formatstring for a hyperlink when a
	submodule is printed in a directory listing. The arguments for the
	formatstring are the path and SHA1 of the submodule commit. Default
	value: none.

nocache::
	If set to the value "1" caching will be disabled. This settings is
	deprecated, and will not be honored starting with cgit-1.0. Default
	value: "0".

noplainemail::
	If set to "1" showing full author email addresses will be disabled.
	Default value: "0".

noheader::
	Flag which, when set to "1", will make cgit omit the standard header
	on all pages. Default value: none. See also: "embedded".

project-list::
	A list of subdirectories inside of scan-path, relative to it, that
	should loaded as git repositories. This must be defined prior to
	scan-path. Default value: none. See also: scan-path, "MACRO
	EXPANSION".

readme::
	Text which will be used as default value for "repo.readme". Multiple
	config keys may be specified, and cgit will use the first found file
	in this list. This is useful in conjunction with scan-path. Default
	value: none. See also: scan-path, repo.readme.

remove-suffix::
	If set to "1" and scan-path is enabled, if any repositories are found
	with a suffix of ".git", this suffix will be removed for the url and
	name. This must be defined prior to scan-path. Default value: "0".
	See also: scan-path.

renamelimit::
	Maximum number of files to consider when detecting renames. The value
	 "-1" uses the compiletime value in git (for further info, look at
	  `man git-diff`). Default value: "-1".

repo.group::
	Legacy alias for "section". This option is deprecated and will not be
	supported in cgit-1.0.

repository-sort::
	The way in which repositories in each section are sorted. Valid values
	are "name" for sorting by the repo name or "age" for sorting by the
	most recently updated repository. Default value: "name". See also:
	section, case-sensitive-sort, section-sort.

robots::
	Text used as content for the "robots" meta-tag. Default value:
	"index, nofollow".

root-desc::
	Text printed below the heading on the repository index page. Default
	value: "a fast webinterface for the git dscm".

root-readme::
	The content of the file specified with this option will be included
	verbatim below the "about" link on the repository index page. Default
	value: none.

root-title::
	Text printed as heading on the repository index page. Default value:
	"Git Repository Browser".

scan-hidden-path::
	If set to "1" and scan-path is enabled, scan-path will recurse into
	directories whose name starts with a period ('.'). Otherwise,
	scan-path will stay away from such directories (considered as
	"hidden"). Note that this does not apply to the ".git" directory in
	non-bare repos. This must be defined prior to scan-path.
	Default value: 0. See also: scan-path.

scan-path::
	A path which will be scanned for repositories. If caching is enabled,
	the result will be cached as a cgitrc include-file in the cache
	directory. If project-list has been defined prior to scan-path,
	scan-path loads only the directories listed in the file pointed to by
	project-list. Be advised that only the global settings taken
	before the scan-path directive will be applied to each repository.
	Default value: none. See also: cache-scanrc-ttl, project-list,
	"MACRO EXPANSION".

section::
	The name of the current repository section - all repositories defined
	after this option will inherit the current section name. Default value:
	none.

section-sort::
	Flag which, when set to "1", will sort the sections on the repository
	listing by name. Set this flag to "0" if the order in the cgitrc file should
	be preserved. Default value: "1". See also: section,
	case-sensitive-sort, repository-sort.

section-from-path::
	A number which, if defined prior to scan-path, specifies how many
	path elements from each repo path to use as a default section name.
	If negative, cgit will discard the specified number of path elements
	above the repo directory. Default value: "0".

side-by-side-diffs::
	If set to "1" shows side-by-side diffs instead of unidiffs per
	default. Default value: "0".

snapshots::
	Text which specifies the default set of snapshot formats that cgit
	generates links for. The value is a space-separated list of zero or
	more of the values "tar", "tar.gz", "tar.bz2", "tar.xz" and "zip".
	Default value: none.

source-filter::
	Specifies a command which will be invoked to format plaintext blobs
	in the tree view. The command will get the blob content on its STDIN
	and the name of the blob as its only command line argument. The STDOUT
	from the command will be included verbatim as the blob contents, i.e.
	this can be used to implement e.g. syntax highlighting. Default value:
	none. See also: "FILTER API".

summary-branches::
	Specifies the number of branches to display in the repository "summary"
	view. Default value: "10".

summary-log::
	Specifies the number of log entries to display in the repository
	"summary" view. Default value: "10".

summary-tags::
	Specifies the number of tags to display in the repository "summary"
	view. Default value: "10".

strict-export::
	Filename which, if specified, needs to be present within the repository
	for cgit to allow access to that repository. This can be used to emulate
	gitweb's EXPORT_OK and STRICT_EXPORT functionality and limit cgit's
	repositories to match those exported by git-daemon. This option must
	be defined prior to scan-path.

virtual-root::
	Url which, if specified, will be used as root for all cgit links. It
	will also cause cgit to generate 'virtual urls', i.e. urls like
	'/cgit/tree/README' as opposed to '?r=cgit&p=tree&path=README'. Default
	value: none.
	NOTE: cgit has recently learned how to use PATH_INFO to achieve the
	same kind of virtual urls, so this option will probably be deprecated.


REPOSITORY SETTINGS
-------------------
repo.about-filter::
	Override the default about-filter. Default value: none. See also:
	"enable-filter-overrides". See also: "FILTER API".

repo.branch-sort::
	Flag which, when set to "age", enables date ordering in the branch ref
	list, and when set to "name" enables ordering by branch name. Default
	value: "name".

repo.clone-url::
	A list of space-separated urls which can be used to clone this repo.
	Default value: none. See also: "MACRO EXPANSION".

repo.commit-filter::
	Override the default commit-filter. Default value: none. See also:
	"enable-filter-overrides". See also: "FILTER API".

repo.commit-sort::
	Flag which, when set to "date", enables strict date ordering in the
	commit log, and when set to "topo" enables strict topological
	ordering. If unset, the default ordering of "git log" is used. Default
	value: unset.

repo.defbranch::
	The name of the default branch for this repository. If no such branch
	exists in the repository, the first branch name (when sorted) is used
	as default instead. Default value: branch pointed to by HEAD, or
	"master" if there is no suitable HEAD.

repo.desc::
	The value to show as repository description. Default value: none.

repo.email-filter::
	Override the default email-filter. Default value: none. See also:
	"enable-filter-overrides". See also: "FILTER API".

repo.enable-commit-graph::
	A flag which can be used to disable the global setting
	`enable-commit-graph'. Default value: none.

repo.enable-log-filecount::
	A flag which can be used to disable the global setting
	`enable-log-filecount'. Default value: none.

repo.enable-log-linecount::
	A flag which can be used to disable the global setting
	`enable-log-linecount'. Default value: none.

repo.enable-remote-branches::
	Flag which, when set to "1", will make cgit display remote branches
	in the summary and refs views. Default value: <enable-remote-branches>.

repo.enable-subject-links::
	A flag which can be used to override the global setting
	`enable-subject-links'. Default value: none.

repo.hide::
	Flag which, when set to "1", hides the repository from the repository
	index. The repository can still be accessed by providing a direct path.
	Default value: "0". See also: "repo.ignore".

repo.ignore::
	Flag which, when set to "1", ignores the repository. The repository
	is not shown in the index and cannot be accessed by providing a direct
	path. Default value: "0". See also: "repo.hide".

repo.logo::
	Url which specifies the source of an image which will be used as a logo
	on this repo's pages. Default value: global logo.

repo.logo-link::
	Url loaded when clicking on the cgit logo image. If unspecified the
	calculated url of the repository index page will be used. Default
	value: global logo-link.

repo.owner-filter::
	Override the default owner-filter. Default value: none. See also:
	"enable-filter-overrides". See also: "FILTER API".

repo.module-link::
	Text which will be used as the formatstring for a hyperlink when a
	submodule is printed in a directory listing. The arguments for the
	formatstring are the path and SHA1 of the submodule commit. Default
	value: <module-link>

repo.module-link.<path>::
	Text which will be used as the formatstring for a hyperlink when a
	submodule with the specified subdirectory path is printed in a
	directory listing. The only argument for the formatstring is the SHA1
	of the submodule commit. Default value: none.

repo.max-stats::
	Override the default maximum statistics period. Valid values are equal
	to the values specified for the global "max-stats" setting. Default
	value: none.

repo.name::
	The value to show as repository name. Default value: <repo.url>.

repo.owner::
	A value used to identify the owner of the repository. Default value:
	none.

repo.path::
	An absolute path to the repository directory. For non-bare repositories
	this is the .git-directory. Default value: none.

repo.readme::
	A path (relative to <repo.path>) which specifies a file to include
	verbatim as the "About" page for this repo. You may also specify a
	git refspec by head or by hash by prepending the refspec followed by
	a colon. For example, "master:docs/readme.mkd". If the value begins
	with a colon, i.e. ":docs/readme.rst", the default branch of the
	repository will be used. Sharing any file will expose that entire
	directory tree to the "/about/PATH" endpoints, so be sure that there
	are no non-public files located in the same directory as the readme
	file. Default value: <readme>.

repo.snapshots::
	A mask of snapshot formats for this repo that cgit generates links for,
	restricted by the global "snapshots" setting. Default value:
	<snapshots>.

repo.section::
	Override the current section name for this repository. Default value:
	none.

repo.source-filter::
	Override the default source-filter. Default value: none. See also:
	"enable-filter-overrides". See also: "FILTER API".

repo.url::
	The relative url used to access the repository. This must be the first
	setting specified for each repo. Default value: none.


REPOSITORY-SPECIFIC CGITRC FILE
-------------------------------
When the option "scan-path" is used to auto-discover git repositories, cgit
will try to parse the file "cgitrc" within any found repository. Such a
repo-specific config file may contain any of the repo-specific options
described above, except "repo.url" and "repo.path". Additionally, the "filter"
options are only acknowledged in repo-specific config files when
"enable-filter-overrides" is set to "1".

Note: the "repo." prefix is dropped from the option names in repo-specific
config files, e.g. "repo.desc" becomes "desc".


FILTER API
----------
By default, filters are separate processes that are executed each time they
are needed.  Alternative technologies may be used by prefixing the filter
specification with the relevant string; available values are:

'exec:'::
	The default "one process per filter" mode.

'lua:'::
	Executes the script using a built-in Lua interpreter. The script is
	loaded once per execution of cgit, and may be called multiple times
	during cgit's lifetime, making it a good choice for repeated filters
	such as the 'email filter'. It responds to three functions:

	'filter_open(argument1, argument2, argument3, ...)'::
		This is called upon activation of the filter for a particular
		set of data.
	'filter_write(buffer)'::
		This is called whenever cgit writes data to the webpage.
	'filter_close()'::
		This is called when the current filtering operation is
		completed. It must return an integer value. Usually 0
		indicates success.

	Additionally, cgit exposes to the Lua the following built-in functions:

	'html(str)'::
		Writes 'str' to the webpage.
	'html_txt(str)'::
		HTML escapes and writes 'str' to the webpage.
	'html_attr(str)'::
		HTML escapes for an attribute and writes "str' to the webpage.
	'html_url_path(str)'::
		URL escapes for a path and writes 'str' to the webpage.
	'html_url_arg(str)'::
		URL escapes for an argument and writes 'str' to the webpage.
	'html_include(file)'::
		Includes 'file' in webpage.


Parameters are provided to filters as follows.

about filter::
	This filter is given a single parameter: the filename of the source
	file to filter. The filter can use the filename to determine (for
	example) the type of syntax to follow when formatting the readme file.
	The about text that is to be filtered is available on standard input
	and the filtered text is expected on standard output.

commit filter::
	This filter is given no arguments. The commit message text that is to
	be filtered is available on standard input and the filtered text is
	expected on standard output.

email filter::
	This filter is given two parameters: the email address of the relevent
	author and a string indicating the originating page. The filter will
	then receive the text string to format on standard input and is
	expected to write to standard output the formatted text to be included
	in the page.

owner filter::
	This filter is given no arguments.  The owner text is avilable on
	standard input and the filter is expected to write to standard
	output.  The output is included in the Owner column.

source filter::
	This filter is given a single parameter: the filename of the source
	file to filter. The filter can use the filename to determine (for
	example) the syntax highlighting mode. The contents of the source
	file that is to be filtered is available on standard input and the
	filtered contents is expected on standard output.

auth filter::
	The authentication filter receives 12 parameters:
	  - filter action, explained below, which specifies which action the
	    filter is called for
	  - http cookie
	  - http method
	  - http referer
	  - http path
	  - http https flag
	  - cgit repo
	  - cgit page
	  - cgit url
	  - cgit login url
	When the filter action is "body", this filter must write to output the
	HTML for displaying the login form, which POSTs to the login url. When
	the filter action is "authenticate-cookie", this filter must validate
	the http cookie and return a 0 if it is invalid or 1 if it is invalid,
	in the exit code / close function. If the filter action is
	"authenticate-post", this filter receives POST'd parameters on
	standard input, and should write a complete CGI response, preferably
	with a 302 redirect, and write to output one or more "Set-Cookie"
	HTTP headers, each followed by a newline.

	Please see `filters/simple-authentication.lua` for a clear example
	script that may be modified.


All filters are handed the following environment variables:

- CGIT_REPO_URL (from repo.url)
- CGIT_REPO_NAME (from repo.name)
- CGIT_REPO_PATH (from repo.path)
- CGIT_REPO_OWNER (from repo.owner)
- CGIT_REPO_DEFBRANCH (from repo.defbranch)
- CGIT_REPO_SECTION (from repo.section)
- CGIT_REPO_CLONE_URL (from repo.clone-url)

If a setting is not defined for a repository and the corresponding global
setting is also not defined (if applicable), then the corresponding
environment variable will be unset.


MACRO EXPANSION
---------------
The following cgitrc options support a simple macro expansion feature,
where tokens prefixed with "$" are replaced with the value of a similarly
named environment variable:

- cache-root
- include
- project-list
- scan-path

Macro expansion will also happen on the content of $CGIT_CONFIG, if
defined.

One usage of this feature is virtual hosting, which in its simplest form
can be accomplished by adding the following line to /etc/cgitrc:

	include=/etc/cgitrc.d/$HTTP_HOST

The following options are expanded during request processing, and support
the environment variables defined in "FILTER API":

- clone-url
- repo.clone-url


CACHE
------

All cache ttl values are in minutes. Negative ttl values indicate that a page
type will never expire, and thus the first time a URL is accessed, the result
will be cached indefinitely, even if the underlying git repository changes.
Conversely, when a ttl value is zero, the cache is disabled for that
particular page type, and the page type is never cached.


EXAMPLE CGITRC FILE
-------------------

....
# Enable caching of up to 1000 output entries
cache-size=1000


# Specify some default clone urls using macro expansion
clone-url=git://foo.org/$CGIT_REPO_URL git@foo.org:$CGIT_REPO_URL

# Specify the css url
css=/css/cgit.css


# Show owner on index page
enable-index-owner=1


# Allow http transport git clone
enable-http-clone=1


# Show extra links for each repository on the index page
enable-index-links=1


# Enable ASCII art commit history graph on the log pages
enable-commit-graph=1


# Show number of affected files per commit on the log pages
enable-log-filecount=1


# Show number of added/removed lines per commit on the log pages
enable-log-linecount=1


# Sort branches by date
branch-sort=age


# Add a cgit favicon
favicon=/favicon.ico


# Use a custom logo
logo=/img/mylogo.png


# Enable statistics per week, month and quarter
max-stats=quarter


# Set the title and heading of the repository index page
root-title=example.com git repositories


# Set a subheading for the repository index page
root-desc=tracking the foobar development


# Include some more info about example.com on the index page
root-readme=/var/www/htdocs/about.html


# Allow download of tar.gz, tar.bz2 and zip-files
snapshots=tar.gz tar.bz2 zip


##
## List of common mimetypes
##

mimetype.gif=image/gif
mimetype.html=text/html
mimetype.jpg=image/jpeg
mimetype.jpeg=image/jpeg
mimetype.pdf=application/pdf
mimetype.png=image/png
mimetype.svg=image/svg+xml


# Highlight source code with python pygments-based highlighter
source-filter=/var/www/cgit/filters/syntax-highlighting.py

# Format markdown, restructuredtext, manpages, text files, and html files
# through the right converters
about-filter=/var/www/cgit/filters/about-formatting.sh

##
## Search for these files in the root of the default branch of repositories
## for coming up with the about page:
##
readme=:README.md
readme=:readme.md
readme=:README.mkd
readme=:readme.mkd
readme=:README.rst
readme=:readme.rst
readme=:README.html
readme=:readme.html
readme=:README.htm
readme=:readme.htm
readme=:README.txt
readme=:readme.txt
readme=:README
readme=:readme
readme=:INSTALL.md
readme=:install.md
readme=:INSTALL.mkd
readme=:install.mkd
readme=:INSTALL.rst
readme=:install.rst
readme=:INSTALL.html
readme=:install.html
readme=:INSTALL.htm
readme=:install.htm
readme=:INSTALL.txt
readme=:install.txt
readme=:INSTALL
readme=:install


##
## List of repositories.
## PS: Any repositories listed when section is unset will not be
##     displayed under a section heading
## PPS: This list could be kept in a different file (e.g. '/etc/cgitrepos')
##      and included like this:
##        include=/etc/cgitrepos
##


repo.url=foo
repo.path=/pub/git/foo.git
repo.desc=the master foo repository
repo.owner=fooman@example.com
repo.readme=info/web/about.html


repo.url=bar
repo.path=/pub/git/bar.git
repo.desc=the bars for your foo
repo.owner=barman@example.com
repo.readme=info/web/about.html


# The next repositories will be displayed under the 'extras' heading
section=extras


repo.url=baz
repo.path=/pub/git/baz.git
repo.desc=a set of extensions for bar users

repo.url=wiz
repo.path=/pub/git/wiz.git
repo.desc=the wizard of foo


# Add some mirrored repositories
section=mirrors


repo.url=git
repo.path=/pub/git/git.git
repo.desc=the dscm


repo.url=linux
repo.path=/pub/git/linux.git
repo.desc=the kernel

# Disable adhoc downloads of this repo
repo.snapshots=0

# Disable line-counts for this repo
repo.enable-log-linecount=0

# Restrict the max statistics period for this repo
repo.max-stats=month
....


BUGS
----
Comments currently cannot appear on the same line as a setting; the comment
will be included as part of the value. E.g. this line:

	robots=index  # allow indexing

will generate the following html element:

	<meta name='robots' content='index  # allow indexing'/>



AUTHOR
------
Lars Hjemli <hjemli@gmail.com>
Jason A. Donenfeld <Jason@zx2c4.com>