-
Notifications
You must be signed in to change notification settings - Fork 79
/
Copy pathapi-parse-options.html
932 lines (932 loc) · 48.7 KB
/
api-parse-options.html
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
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta name="generator" content="Asciidoctor 2.0.23"/>
<title>parse-options API</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"/>
<style>
/*! Asciidoctor default stylesheet | MIT License | https://asciidoctor.org */
/* Uncomment the following line when using as a custom stylesheet */
/* @import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700"; */
html{font-family:sans-serif;-webkit-text-size-adjust:100%}
a{background:none}
a:focus{outline:thin dotted}
a:active,a:hover{outline:0}
h1{font-size:2em;margin:.67em 0}
b,strong{font-weight:bold}
abbr{font-size:.9em}
abbr[title]{cursor:help;border-bottom:1px dotted #dddddf;text-decoration:none}
dfn{font-style:italic}
hr{height:0}
mark{background:#ff0;color:#000}
code,kbd,pre,samp{font-family:monospace;font-size:1em}
pre{white-space:pre-wrap}
q{quotes:"\201C" "\201D" "\2018" "\2019"}
small{font-size:80%}
sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
sup{top:-.5em}
sub{bottom:-.25em}
img{border:0}
svg:not(:root){overflow:hidden}
figure{margin:0}
audio,video{display:inline-block}
audio:not([controls]){display:none;height:0}
fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}
legend{border:0;padding:0}
button,input,select,textarea{font-family:inherit;font-size:100%;margin:0}
button,input{line-height:normal}
button,select{text-transform:none}
button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer}
button[disabled],html input[disabled]{cursor:default}
input[type=checkbox],input[type=radio]{padding:0}
button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}
textarea{overflow:auto;vertical-align:top}
table{border-collapse:collapse;border-spacing:0}
*,::before,::after{box-sizing:border-box}
html,body{font-size:100%}
body{background:#fff;color:rgba(0,0,0,.8);padding:0;margin:0;font-family:"Noto Serif","DejaVu Serif",serif;line-height:1;position:relative;cursor:auto;-moz-tab-size:4;-o-tab-size:4;tab-size:4;word-wrap:anywhere;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased}
a:hover{cursor:pointer}
img,object,embed{max-width:100%;height:auto}
object,embed{height:100%}
img{-ms-interpolation-mode:bicubic}
.left{float:left!important}
.right{float:right!important}
.text-left{text-align:left!important}
.text-right{text-align:right!important}
.text-center{text-align:center!important}
.text-justify{text-align:justify!important}
.hide{display:none}
img,object,svg{display:inline-block;vertical-align:middle}
textarea{height:auto;min-height:50px}
select{width:100%}
.subheader,.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{line-height:1.45;color:#7a2518;font-weight:400;margin-top:0;margin-bottom:.25em}
div,dl,dt,dd,ul,ol,li,h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6,pre,form,p,blockquote,th,td{margin:0;padding:0}
a{color:#2156a5;text-decoration:underline;line-height:inherit}
a:hover,a:focus{color:#1d4b8f}
a img{border:0}
p{line-height:1.6;margin-bottom:1.25em;text-rendering:optimizeLegibility}
p aside{font-size:.875em;line-height:1.35;font-style:italic}
h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{font-family:"Open Sans","DejaVu Sans",sans-serif;font-weight:300;font-style:normal;color:#ba3925;text-rendering:optimizeLegibility;margin-top:1em;margin-bottom:.5em;line-height:1.0125em}
h1 small,h2 small,h3 small,#toctitle small,.sidebarblock>.content>.title small,h4 small,h5 small,h6 small{font-size:60%;color:#e99b8f;line-height:0}
h1{font-size:2.125em}
h2{font-size:1.6875em}
h3,#toctitle,.sidebarblock>.content>.title{font-size:1.375em}
h4,h5{font-size:1.125em}
h6{font-size:1em}
hr{border:solid #dddddf;border-width:1px 0 0;clear:both;margin:1.25em 0 1.1875em}
em,i{font-style:italic;line-height:inherit}
strong,b{font-weight:bold;line-height:inherit}
small{font-size:60%;line-height:inherit}
code{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-weight:400;color:rgba(0,0,0,.9)}
ul,ol,dl{line-height:1.6;margin-bottom:1.25em;list-style-position:outside;font-family:inherit}
ul,ol{margin-left:1.5em}
ul li ul,ul li ol{margin-left:1.25em;margin-bottom:0}
ul.circle{list-style-type:circle}
ul.disc{list-style-type:disc}
ul.square{list-style-type:square}
ul.circle ul:not([class]),ul.disc ul:not([class]),ul.square ul:not([class]){list-style:inherit}
ol li ul,ol li ol{margin-left:1.25em;margin-bottom:0}
dl dt{margin-bottom:.3125em;font-weight:bold}
dl dd{margin-bottom:1.25em}
blockquote{margin:0 0 1.25em;padding:.5625em 1.25em 0 1.1875em;border-left:1px solid #ddd}
blockquote,blockquote p{line-height:1.6;color:rgba(0,0,0,.85)}
@media screen and (min-width:768px){h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2}
h1{font-size:2.75em}
h2{font-size:2.3125em}
h3,#toctitle,.sidebarblock>.content>.title{font-size:1.6875em}
h4{font-size:1.4375em}}
table{background:#fff;margin-bottom:1.25em;border:1px solid #dedede;word-wrap:normal}
table thead,table tfoot{background:#f7f8f7}
table thead tr th,table thead tr td,table tfoot tr th,table tfoot tr td{padding:.5em .625em .625em;font-size:inherit;color:rgba(0,0,0,.8);text-align:left}
table tr th,table tr td{padding:.5625em .625em;font-size:inherit;color:rgba(0,0,0,.8)}
table tr.even,table tr.alt{background:#f8f8f7}
table thead tr th,table tfoot tr th,table tbody tr td,table tr td,table tfoot tr td{line-height:1.6}
h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2;word-spacing:-.05em}
h1 strong,h2 strong,h3 strong,#toctitle strong,.sidebarblock>.content>.title strong,h4 strong,h5 strong,h6 strong{font-weight:400}
.center{margin-left:auto;margin-right:auto}
.stretch{width:100%}
.clearfix::before,.clearfix::after,.float-group::before,.float-group::after{content:" ";display:table}
.clearfix::after,.float-group::after{clear:both}
:not(pre).nobreak{word-wrap:normal}
:not(pre).nowrap{white-space:nowrap}
:not(pre).pre-wrap{white-space:pre-wrap}
:not(pre):not([class^=L])>code{font-size:.9375em;font-style:normal!important;letter-spacing:0;padding:.1em .5ex;word-spacing:-.15em;background:#f7f7f8;border-radius:4px;line-height:1.45;text-rendering:optimizeSpeed}
pre{color:rgba(0,0,0,.9);font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;line-height:1.45;text-rendering:optimizeSpeed}
pre code,pre pre{color:inherit;font-size:inherit;line-height:inherit}
pre>code{display:block}
pre.nowrap,pre.nowrap pre{white-space:pre;word-wrap:normal}
em em{font-style:normal}
strong strong{font-weight:400}
.keyseq{color:rgba(51,51,51,.8)}
kbd{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background:#f7f7f7;border:1px solid #ccc;border-radius:3px;box-shadow:0 1px 0 rgba(0,0,0,.2),inset 0 0 0 .1em #fff;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
.keyseq kbd:first-child{margin-left:0}
.keyseq kbd:last-child{margin-right:0}
.menuseq,.menuref{color:#000}
.menuseq b:not(.caret),.menuref{font-weight:inherit}
.menuseq{word-spacing:-.02em}
.menuseq b.caret{font-size:1.25em;line-height:.8}
.menuseq i.caret{font-weight:bold;text-align:center;width:.45em}
b.button::before,b.button::after{position:relative;top:-1px;font-weight:400}
b.button::before{content:"[";padding:0 3px 0 2px}
b.button::after{content:"]";padding:0 2px 0 3px}
p a>code:hover{color:rgba(0,0,0,.9)}
#header,#content,#footnotes,#footer{width:100%;margin:0 auto;max-width:62.5em;*zoom:1;position:relative;padding-left:.9375em;padding-right:.9375em}
#header::before,#header::after,#content::before,#content::after,#footnotes::before,#footnotes::after,#footer::before,#footer::after{content:" ";display:table}
#header::after,#content::after,#footnotes::after,#footer::after{clear:both}
#content{margin-top:1.25em}
#content::before{content:none}
#header>h1:first-child{color:rgba(0,0,0,.85);margin-top:2.25rem;margin-bottom:0}
#header>h1:first-child+#toc{margin-top:8px;border-top:1px solid #dddddf}
#header>h1:only-child{border-bottom:1px solid #dddddf;padding-bottom:8px}
#header .details{border-bottom:1px solid #dddddf;line-height:1.45;padding-top:.25em;padding-bottom:.25em;padding-left:.25em;color:rgba(0,0,0,.6);display:flex;flex-flow:row wrap}
#header .details span:first-child{margin-left:-.125em}
#header .details span.email a{color:rgba(0,0,0,.85)}
#header .details br{display:none}
#header .details br+span::before{content:"\00a0\2013\00a0"}
#header .details br+span.author::before{content:"\00a0\22c5\00a0";color:rgba(0,0,0,.85)}
#header .details br+span#revremark::before{content:"\00a0|\00a0"}
#header #revnumber{text-transform:capitalize}
#header #revnumber::after{content:"\00a0"}
#content>h1:first-child:not([class]){color:rgba(0,0,0,.85);border-bottom:1px solid #dddddf;padding-bottom:8px;margin-top:0;padding-top:1rem;margin-bottom:1.25rem}
#toc{border-bottom:1px solid #e7e7e9;padding-bottom:.5em}
#toc>ul{margin-left:.125em}
#toc ul.sectlevel0>li>a{font-style:italic}
#toc ul.sectlevel0 ul.sectlevel1{margin:.5em 0}
#toc ul{font-family:"Open Sans","DejaVu Sans",sans-serif;list-style-type:none}
#toc li{line-height:1.3334;margin-top:.3334em}
#toc a{text-decoration:none}
#toc a:active{text-decoration:underline}
#toctitle{color:#7a2518;font-size:1.2em}
@media screen and (min-width:768px){#toctitle{font-size:1.375em}
body.toc2{padding-left:15em;padding-right:0}
body.toc2 #header>h1:nth-last-child(2){border-bottom:1px solid #dddddf;padding-bottom:8px}
#toc.toc2{margin-top:0!important;background:#f8f8f7;position:fixed;width:15em;left:0;top:0;border-right:1px solid #e7e7e9;border-top-width:0!important;border-bottom-width:0!important;z-index:1000;padding:1.25em 1em;height:100%;overflow:auto}
#toc.toc2 #toctitle{margin-top:0;margin-bottom:.8rem;font-size:1.2em}
#toc.toc2>ul{font-size:.9em;margin-bottom:0}
#toc.toc2 ul ul{margin-left:0;padding-left:1em}
#toc.toc2 ul.sectlevel0 ul.sectlevel1{padding-left:0;margin-top:.5em;margin-bottom:.5em}
body.toc2.toc-right{padding-left:0;padding-right:15em}
body.toc2.toc-right #toc.toc2{border-right-width:0;border-left:1px solid #e7e7e9;left:auto;right:0}}
@media screen and (min-width:1280px){body.toc2{padding-left:20em;padding-right:0}
#toc.toc2{width:20em}
#toc.toc2 #toctitle{font-size:1.375em}
#toc.toc2>ul{font-size:.95em}
#toc.toc2 ul ul{padding-left:1.25em}
body.toc2.toc-right{padding-left:0;padding-right:20em}}
#content #toc{border:1px solid #e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;border-radius:4px}
#content #toc>:first-child{margin-top:0}
#content #toc>:last-child{margin-bottom:0}
#footer{max-width:none;background:rgba(0,0,0,.8);padding:1.25em}
#footer-text{color:hsla(0,0%,100%,.8);line-height:1.44}
#content{margin-bottom:.625em}
.sect1{padding-bottom:.625em}
@media screen and (min-width:768px){#content{margin-bottom:1.25em}
.sect1{padding-bottom:1.25em}}
.sect1:last-child{padding-bottom:0}
.sect1+.sect1{border-top:1px solid #e7e7e9}
#content h1>a.anchor,h2>a.anchor,h3>a.anchor,#toctitle>a.anchor,.sidebarblock>.content>.title>a.anchor,h4>a.anchor,h5>a.anchor,h6>a.anchor{position:absolute;z-index:1001;width:1.5ex;margin-left:-1.5ex;display:block;text-decoration:none!important;visibility:hidden;text-align:center;font-weight:400}
#content h1>a.anchor::before,h2>a.anchor::before,h3>a.anchor::before,#toctitle>a.anchor::before,.sidebarblock>.content>.title>a.anchor::before,h4>a.anchor::before,h5>a.anchor::before,h6>a.anchor::before{content:"\00A7";font-size:.85em;display:block;padding-top:.1em}
#content h1:hover>a.anchor,#content h1>a.anchor:hover,h2:hover>a.anchor,h2>a.anchor:hover,h3:hover>a.anchor,#toctitle:hover>a.anchor,.sidebarblock>.content>.title:hover>a.anchor,h3>a.anchor:hover,#toctitle>a.anchor:hover,.sidebarblock>.content>.title>a.anchor:hover,h4:hover>a.anchor,h4>a.anchor:hover,h5:hover>a.anchor,h5>a.anchor:hover,h6:hover>a.anchor,h6>a.anchor:hover{visibility:visible}
#content h1>a.link,h2>a.link,h3>a.link,#toctitle>a.link,.sidebarblock>.content>.title>a.link,h4>a.link,h5>a.link,h6>a.link{color:#ba3925;text-decoration:none}
#content h1>a.link:hover,h2>a.link:hover,h3>a.link:hover,#toctitle>a.link:hover,.sidebarblock>.content>.title>a.link:hover,h4>a.link:hover,h5>a.link:hover,h6>a.link:hover{color:#a53221}
details,.audioblock,.imageblock,.literalblock,.listingblock,.stemblock,.videoblock{margin-bottom:1.25em}
details{margin-left:1.25rem}
details>summary{cursor:pointer;display:block;position:relative;line-height:1.6;margin-bottom:.625rem;outline:none;-webkit-tap-highlight-color:transparent}
details>summary::-webkit-details-marker{display:none}
details>summary::before{content:"";border:solid transparent;border-left:solid;border-width:.3em 0 .3em .5em;position:absolute;top:.5em;left:-1.25rem;transform:translateX(15%)}
details[open]>summary::before{border:solid transparent;border-top:solid;border-width:.5em .3em 0;transform:translateY(15%)}
details>summary::after{content:"";width:1.25rem;height:1em;position:absolute;top:.3em;left:-1.25rem}
.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{text-rendering:optimizeLegibility;text-align:left;font-family:"Noto Serif","DejaVu Serif",serif;font-size:1rem;font-style:italic}
table.tableblock.fit-content>caption.title{white-space:nowrap;width:0}
.paragraph.lead>p,#preamble>.sectionbody>[class=paragraph]:first-of-type p{font-size:1.21875em;line-height:1.6;color:rgba(0,0,0,.85)}
.admonitionblock>table{border-collapse:separate;border:0;background:none;width:100%}
.admonitionblock>table td.icon{text-align:center;width:80px}
.admonitionblock>table td.icon img{max-width:none}
.admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
.admonitionblock>table td.content{padding-left:1.125em;padding-right:1.25em;border-left:1px solid #dddddf;color:rgba(0,0,0,.6);word-wrap:anywhere}
.admonitionblock>table td.content>:last-child>:last-child{margin-bottom:0}
.exampleblock>.content{border:1px solid #e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;border-radius:4px}
.sidebarblock{border:1px solid #dbdbd6;margin-bottom:1.25em;padding:1.25em;background:#f3f3f2;border-radius:4px}
.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
.exampleblock>.content>:first-child,.sidebarblock>.content>:first-child{margin-top:0}
.exampleblock>.content>:last-child,.exampleblock>.content>:last-child>:last-child,.exampleblock>.content .olist>ol>li:last-child>:last-child,.exampleblock>.content .ulist>ul>li:last-child>:last-child,.exampleblock>.content .qlist>ol>li:last-child>:last-child,.sidebarblock>.content>:last-child,.sidebarblock>.content>:last-child>:last-child,.sidebarblock>.content .olist>ol>li:last-child>:last-child,.sidebarblock>.content .ulist>ul>li:last-child>:last-child,.sidebarblock>.content .qlist>ol>li:last-child>:last-child{margin-bottom:0}
.literalblock pre,.listingblock>.content>pre{border-radius:4px;overflow-x:auto;padding:1em;font-size:.8125em}
@media screen and (min-width:768px){.literalblock pre,.listingblock>.content>pre{font-size:.90625em}}
@media screen and (min-width:1280px){.literalblock pre,.listingblock>.content>pre{font-size:1em}}
.literalblock pre,.listingblock>.content>pre:not(.highlight),.listingblock>.content>pre[class=highlight],.listingblock>.content>pre[class^="highlight "]{background:#f7f7f8}
.literalblock.output pre{color:#f7f7f8;background:rgba(0,0,0,.9)}
.listingblock>.content{position:relative}
.listingblock code[data-lang]::before{display:none;content:attr(data-lang);position:absolute;font-size:.75em;top:.425rem;right:.5rem;line-height:1;text-transform:uppercase;color:inherit;opacity:.5}
.listingblock:hover code[data-lang]::before{display:block}
.listingblock.terminal pre .command::before{content:attr(data-prompt);padding-right:.5em;color:inherit;opacity:.5}
.listingblock.terminal pre .command:not([data-prompt])::before{content:"$"}
.listingblock pre.highlightjs{padding:0}
.listingblock pre.highlightjs>code{padding:1em;border-radius:4px}
.listingblock pre.prettyprint{border-width:0}
.prettyprint{background:#f7f7f8}
pre.prettyprint .linenums{line-height:1.45;margin-left:2em}
pre.prettyprint li{background:none;list-style-type:inherit;padding-left:0}
pre.prettyprint li code[data-lang]::before{opacity:1}
pre.prettyprint li:not(:first-child) code[data-lang]::before{display:none}
table.linenotable{border-collapse:separate;border:0;margin-bottom:0;background:none}
table.linenotable td[class]{color:inherit;vertical-align:top;padding:0;line-height:inherit;white-space:normal}
table.linenotable td.code{padding-left:.75em}
table.linenotable td.linenos,pre.pygments .linenos{border-right:1px solid;opacity:.35;padding-right:.5em;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}
pre.pygments span.linenos{display:inline-block;margin-right:.75em}
.quoteblock{margin:0 1em 1.25em 1.5em;display:table}
.quoteblock:not(.excerpt)>.title{margin-left:-1.5em;margin-bottom:.75em}
.quoteblock blockquote,.quoteblock p{color:rgba(0,0,0,.85);font-size:1.15rem;line-height:1.75;word-spacing:.1em;letter-spacing:0;font-style:italic;text-align:justify}
.quoteblock blockquote{margin:0;padding:0;border:0}
.quoteblock blockquote::before{content:"\201c";float:left;font-size:2.75em;font-weight:bold;line-height:.6em;margin-left:-.6em;color:#7a2518;text-shadow:0 1px 2px rgba(0,0,0,.1)}
.quoteblock blockquote>.paragraph:last-child p{margin-bottom:0}
.quoteblock .attribution{margin-top:.75em;margin-right:.5ex;text-align:right}
.verseblock{margin:0 1em 1.25em}
.verseblock pre{font-family:"Open Sans","DejaVu Sans",sans-serif;font-size:1.15rem;color:rgba(0,0,0,.85);font-weight:300;text-rendering:optimizeLegibility}
.verseblock pre strong{font-weight:400}
.verseblock .attribution{margin-top:1.25rem;margin-left:.5ex}
.quoteblock .attribution,.verseblock .attribution{font-size:.9375em;line-height:1.45;font-style:italic}
.quoteblock .attribution br,.verseblock .attribution br{display:none}
.quoteblock .attribution cite,.verseblock .attribution cite{display:block;letter-spacing:-.025em;color:rgba(0,0,0,.6)}
.quoteblock.abstract blockquote::before,.quoteblock.excerpt blockquote::before,.quoteblock .quoteblock blockquote::before{display:none}
.quoteblock.abstract blockquote,.quoteblock.abstract p,.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{line-height:1.6;word-spacing:0}
.quoteblock.abstract{margin:0 1em 1.25em;display:block}
.quoteblock.abstract>.title{margin:0 0 .375em;font-size:1.15em;text-align:center}
.quoteblock.excerpt>blockquote,.quoteblock .quoteblock{padding:0 0 .25em 1em;border-left:.25em solid #dddddf}
.quoteblock.excerpt,.quoteblock .quoteblock{margin-left:0}
.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{color:inherit;font-size:1.0625rem}
.quoteblock.excerpt .attribution,.quoteblock .quoteblock .attribution{color:inherit;font-size:.85rem;text-align:left;margin-right:0}
p.tableblock:last-child{margin-bottom:0}
td.tableblock>.content{margin-bottom:1.25em;word-wrap:anywhere}
td.tableblock>.content>:last-child{margin-bottom:-1.25em}
table.tableblock,th.tableblock,td.tableblock{border:0 solid #dedede}
table.grid-all>*>tr>*{border-width:1px}
table.grid-cols>*>tr>*{border-width:0 1px}
table.grid-rows>*>tr>*{border-width:1px 0}
table.frame-all{border-width:1px}
table.frame-ends{border-width:1px 0}
table.frame-sides{border-width:0 1px}
table.frame-none>colgroup+*>:first-child>*,table.frame-sides>colgroup+*>:first-child>*{border-top-width:0}
table.frame-none>:last-child>:last-child>*,table.frame-sides>:last-child>:last-child>*{border-bottom-width:0}
table.frame-none>*>tr>:first-child,table.frame-ends>*>tr>:first-child{border-left-width:0}
table.frame-none>*>tr>:last-child,table.frame-ends>*>tr>:last-child{border-right-width:0}
table.stripes-all>*>tr,table.stripes-odd>*>tr:nth-of-type(odd),table.stripes-even>*>tr:nth-of-type(even),table.stripes-hover>*>tr:hover{background:#f8f8f7}
th.halign-left,td.halign-left{text-align:left}
th.halign-right,td.halign-right{text-align:right}
th.halign-center,td.halign-center{text-align:center}
th.valign-top,td.valign-top{vertical-align:top}
th.valign-bottom,td.valign-bottom{vertical-align:bottom}
th.valign-middle,td.valign-middle{vertical-align:middle}
table thead th,table tfoot th{font-weight:bold}
tbody tr th{background:#f7f8f7}
tbody tr th,tbody tr th p,tfoot tr th,tfoot tr th p{color:rgba(0,0,0,.8);font-weight:bold}
p.tableblock>code:only-child{background:none;padding:0}
p.tableblock{font-size:1em}
ol{margin-left:1.75em}
ul li ol{margin-left:1.5em}
dl dd{margin-left:1.125em}
dl dd:last-child,dl dd:last-child>:last-child{margin-bottom:0}
li p,ul dd,ol dd,.olist .olist,.ulist .ulist,.ulist .olist,.olist .ulist{margin-bottom:.625em}
ul.checklist,ul.none,ol.none,ul.no-bullet,ol.no-bullet,ol.unnumbered,ul.unstyled,ol.unstyled{list-style-type:none}
ul.no-bullet,ol.no-bullet,ol.unnumbered{margin-left:.625em}
ul.unstyled,ol.unstyled{margin-left:0}
li>p:empty:only-child::before{content:"";display:inline-block}
ul.checklist>li>p:first-child{margin-left:-1em}
ul.checklist>li>p:first-child>.fa-square-o:first-child,ul.checklist>li>p:first-child>.fa-check-square-o:first-child{width:1.25em;font-size:.8em;position:relative;bottom:.125em}
ul.checklist>li>p:first-child>input[type=checkbox]:first-child{margin-right:.25em}
ul.inline{display:flex;flex-flow:row wrap;list-style:none;margin:0 0 .625em -1.25em}
ul.inline>li{margin-left:1.25em}
.unstyled dl dt{font-weight:400;font-style:normal}
ol.arabic{list-style-type:decimal}
ol.decimal{list-style-type:decimal-leading-zero}
ol.loweralpha{list-style-type:lower-alpha}
ol.upperalpha{list-style-type:upper-alpha}
ol.lowerroman{list-style-type:lower-roman}
ol.upperroman{list-style-type:upper-roman}
ol.lowergreek{list-style-type:lower-greek}
.hdlist>table,.colist>table{border:0;background:none}
.hdlist>table>tbody>tr,.colist>table>tbody>tr{background:none}
td.hdlist1,td.hdlist2{vertical-align:top;padding:0 .625em}
td.hdlist1{font-weight:bold;padding-bottom:1.25em}
td.hdlist2{word-wrap:anywhere}
.literalblock+.colist,.listingblock+.colist{margin-top:-.5em}
.colist td:not([class]):first-child{padding:.4em .75em 0;line-height:1;vertical-align:top}
.colist td:not([class]):first-child img{max-width:none}
.colist td:not([class]):last-child{padding:.25em 0}
.thumb,.th{line-height:0;display:inline-block;border:4px solid #fff;box-shadow:0 0 0 1px #ddd}
.imageblock.left{margin:.25em .625em 1.25em 0}
.imageblock.right{margin:.25em 0 1.25em .625em}
.imageblock>.title{margin-bottom:0}
.imageblock.thumb,.imageblock.th{border-width:6px}
.imageblock.thumb>.title,.imageblock.th>.title{padding:0 .125em}
.image.left,.image.right{margin-top:.25em;margin-bottom:.25em;display:inline-block;line-height:0}
.image.left{margin-right:.625em}
.image.right{margin-left:.625em}
a.image{text-decoration:none;display:inline-block}
a.image object{pointer-events:none}
sup.footnote,sup.footnoteref{font-size:.875em;position:static;vertical-align:super}
sup.footnote a,sup.footnoteref a{text-decoration:none}
sup.footnote a:active,sup.footnoteref a:active,#footnotes .footnote a:first-of-type:active{text-decoration:underline}
#footnotes{padding-top:.75em;padding-bottom:.75em;margin-bottom:.625em}
#footnotes hr{width:20%;min-width:6.25em;margin:-.25em 0 .75em;border-width:1px 0 0}
#footnotes .footnote{padding:0 .375em 0 .225em;line-height:1.3334;font-size:.875em;margin-left:1.2em;margin-bottom:.2em}
#footnotes .footnote a:first-of-type{font-weight:bold;text-decoration:none;margin-left:-1.05em}
#footnotes .footnote:last-of-type{margin-bottom:0}
#content #footnotes{margin-top:-.625em;margin-bottom:0;padding:.75em 0}
div.unbreakable{page-break-inside:avoid}
.big{font-size:larger}
.small{font-size:smaller}
.underline{text-decoration:underline}
.overline{text-decoration:overline}
.line-through{text-decoration:line-through}
.aqua{color:#00bfbf}
.aqua-background{background:#00fafa}
.black{color:#000}
.black-background{background:#000}
.blue{color:#0000bf}
.blue-background{background:#0000fa}
.fuchsia{color:#bf00bf}
.fuchsia-background{background:#fa00fa}
.gray{color:#606060}
.gray-background{background:#7d7d7d}
.green{color:#006000}
.green-background{background:#007d00}
.lime{color:#00bf00}
.lime-background{background:#00fa00}
.maroon{color:#600000}
.maroon-background{background:#7d0000}
.navy{color:#000060}
.navy-background{background:#00007d}
.olive{color:#606000}
.olive-background{background:#7d7d00}
.purple{color:#600060}
.purple-background{background:#7d007d}
.red{color:#bf0000}
.red-background{background:#fa0000}
.silver{color:#909090}
.silver-background{background:#bcbcbc}
.teal{color:#006060}
.teal-background{background:#007d7d}
.white{color:#bfbfbf}
.white-background{background:#fafafa}
.yellow{color:#bfbf00}
.yellow-background{background:#fafa00}
span.icon>.fa{cursor:default}
a span.icon>.fa{cursor:inherit}
.admonitionblock td.icon [class^="fa icon-"]{font-size:2.5em;text-shadow:1px 1px 2px rgba(0,0,0,.5);cursor:default}
.admonitionblock td.icon .icon-note::before{content:"\f05a";color:#19407c}
.admonitionblock td.icon .icon-tip::before{content:"\f0eb";text-shadow:1px 1px 2px rgba(155,155,0,.8);color:#111}
.admonitionblock td.icon .icon-warning::before{content:"\f071";color:#bf6900}
.admonitionblock td.icon .icon-caution::before{content:"\f06d";color:#bf3400}
.admonitionblock td.icon .icon-important::before{content:"\f06a";color:#bf0000}
.conum[data-value]{display:inline-block;color:#fff!important;background:rgba(0,0,0,.8);border-radius:50%;text-align:center;font-size:.75em;width:1.67em;height:1.67em;line-height:1.67em;font-family:"Open Sans","DejaVu Sans",sans-serif;font-style:normal;font-weight:bold}
.conum[data-value] *{color:#fff!important}
.conum[data-value]+b{display:none}
.conum[data-value]::after{content:attr(data-value)}
pre .conum[data-value]{position:relative;top:-.125em}
b.conum *{color:inherit!important}
.conum:not([data-value]):empty{display:none}
dt,th.tableblock,td.content,div.footnote{text-rendering:optimizeLegibility}
h1,h2,p,td.content,span.alt,summary{letter-spacing:-.01em}
p strong,td.content strong,div.footnote strong{letter-spacing:-.005em}
p,blockquote,dt,td.content,td.hdlist1,span.alt,summary{font-size:1.0625rem}
p{margin-bottom:1.25rem}
.sidebarblock p,.sidebarblock dt,.sidebarblock td.content,p.tableblock{font-size:1em}
.exampleblock>.content{background:#fffef7;border-color:#e0e0dc;box-shadow:0 1px 4px #e0e0dc}
.print-only{display:none!important}
@page{margin:1.25cm .75cm}
@media print{*{box-shadow:none!important;text-shadow:none!important}
html{font-size:80%}
a{color:inherit!important;text-decoration:underline!important}
a.bare,a[href^="#"],a[href^="mailto:"]{text-decoration:none!important}
a[href^="http:"]:not(.bare)::after,a[href^="https:"]:not(.bare)::after{content:"(" attr(href) ")";display:inline-block;font-size:.875em;padding-left:.25em}
abbr[title]{border-bottom:1px dotted}
abbr[title]::after{content:" (" attr(title) ")"}
pre,blockquote,tr,img,object,svg{page-break-inside:avoid}
thead{display:table-header-group}
svg{max-width:100%}
p,blockquote,dt,td.content{font-size:1em;orphans:3;widows:3}
h2,h3,#toctitle,.sidebarblock>.content>.title{page-break-after:avoid}
#header,#content,#footnotes,#footer{max-width:none}
#toc,.sidebarblock,.exampleblock>.content{background:none!important}
#toc{border-bottom:1px solid #dddddf!important;padding-bottom:0!important}
body.book #header{text-align:center}
body.book #header>h1:first-child{border:0!important;margin:2.5em 0 1em}
body.book #header .details{border:0!important;display:block;padding:0!important}
body.book #header .details span:first-child{margin-left:0!important}
body.book #header .details br{display:block}
body.book #header .details br+span::before{content:none!important}
body.book #toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important}
body.book #toc,body.book #preamble,body.book h1.sect0,body.book .sect1>h2{page-break-before:always}
.listingblock code[data-lang]::before{display:block}
#footer{padding:0 .9375em}
.hide-on-print{display:none!important}
.print-only{display:block!important}
.hide-for-print{display:none!important}
.show-for-print{display:inherit!important}}
@media amzn-kf8,print{#header>h1:first-child{margin-top:1.25rem}
.sect1{padding:0!important}
.sect1+.sect1{border:0}
#footer{background:none}
#footer-text{color:rgba(0,0,0,.6);font-size:.9em}}
@media amzn-kf8{#header,#content,#footnotes,#footer{padding:0}}
</style>
</head>
<body class="article">
<div id="header">
<h1>parse-options API</h1>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The parse-options API is used to parse and massage options in Git
and to provide a usage help with consistent look.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_basics">Basics</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The argument vector <code>argv</code>[] may usually contain mandatory or optional
<em>non-option arguments</em>, e.g. a filename or a branch, <em>options</em>, and
<em>subcommands</em>.
Options are optional arguments that start with a dash and
that allow to change the behavior of a command.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>There are basically three types of options:
<em>boolean</em> options,
options with (mandatory) <em>arguments</em> and
options with <em>optional arguments</em>
(i.e. a boolean option that can be adjusted).</p>
</li>
<li>
<p>There are basically two forms of options:
<em>Short options</em> consist of one dash (<code>-</code>) and one alphanumeric
character.
<em>Long options</em> begin with two dashes (<code>--</code>) and some
alphanumeric characters.</p>
</li>
<li>
<p>Options are case-sensitive.
Please define <em>lower-case long options</em> only.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The parse-options API allows:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><em>stuck</em> and <em>separate form</em> of options with arguments.
<code>-oArg</code> is stuck, <code>-o</code> <code>Arg</code> is separate form.
<code>--option=Arg</code> is stuck, <code>--option</code> <code>Arg</code> is separate form.</p>
</li>
<li>
<p>Long options may be <em>abbreviated</em>, as long as the abbreviation
is unambiguous.</p>
</li>
<li>
<p>Short options may be bundled, e.g. <code>-a</code> <code>-b</code> can be specified as <code>-ab</code>.</p>
</li>
<li>
<p>Boolean long options can be <em>negated</em> (or <em>unset</em>) by prepending
<code>no-</code>, e.g. <code>--no-abbrev</code> instead of <code>--abbrev</code>. Conversely,
options that begin with <code>no-</code> can be <em>negated</em> by removing it.
Other long options can be unset (e.g., set string to NULL, set
integer to 0) by prepending <code>no-</code>.</p>
</li>
<li>
<p>Options and non-option arguments can clearly be separated using the <code>--</code>
option, e.g. <code>-a</code> <code>-b</code> <code>--option</code> <code>--</code> <code>--this-is-a-file</code> indicates that
<code>--this-is-a-file</code> must not be processed as an option.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Subcommands are special in a couple of ways:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Subcommands only have long form, and they have no double dash prefix, no
negated form, and no description, and they don’t take any arguments, and
can’t be abbreviated.</p>
</li>
<li>
<p>There must be exactly one subcommand among the arguments, or zero if the
command has a default operation mode.</p>
</li>
<li>
<p>All arguments following the subcommand are considered to be arguments of
the subcommand, and, conversely, arguments meant for the subcommand may
not precede the subcommand.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Therefore, if the options array contains at least one subcommand and
<code>parse_options</code>() encounters the first dashless argument, it will either:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>stop and return, if that dashless argument is a known subcommand, setting
<code>value</code> to the function pointer associated with that subcommand, storing
the name of the subcommand in argv[0], and leaving the rest of the
arguments unprocessed, or</p>
</li>
<li>
<p>stop and return, if it was invoked with the <code>PARSE_OPT_SUBCOMMAND_OPTIONAL</code>
flag and that dashless argument doesn’t match any subcommands, leaving
<code>value</code> unchanged and the rest of the arguments unprocessed, or</p>
</li>
<li>
<p>show error and usage, and abort.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_steps_to_parse_options">Steps to parse options</h2>
<div class="sectionbody">
<div class="olist arabic">
<ol class="arabic">
<li>
<p>#include "parse-options.<code>h</code>"</p>
</li>
<li>
<p>define a NULL-terminated
<code>static</code> <code>const</code> <code>char</code> <code>*</code> <code>const</code> <code>builtin_foo_usage</code>[] array
containing alternative usage strings</p>
</li>
<li>
<p>define <code>builtin_foo_options</code> array as described below
in section <em>Data Structure</em>.</p>
</li>
<li>
<p>in <code>cmd_foo</code>(<code>int</code> <code>argc,</code> <code>const</code> <code>char</code> <code>**argv,</code> <code>const</code> <code>char</code> <code>*prefix</code>)
call</p>
<div class="literalblock">
<div class="content">
<pre>argc = parse_options(argc, argv, prefix, builtin_foo_options, builtin_foo_usage, flags);</pre>
</div>
</div>
<div class="paragraph">
<p><code>parse_options</code>() will filter out the processed options of <code>argv</code>[] and leave the
non-option arguments in <code>argv</code>[].
<code>argc</code> is updated appropriately because of the assignment.</p>
</div>
<div class="paragraph">
<p>You can also pass NULL instead of a usage array as the fifth parameter of
parse_options(), to avoid displaying a help screen with usage info and
option list. This should only be done if necessary, e.g. to implement
a limited parser for only a subset of the options that needs to be run
before the full parser, which in turn shows the full help message.</p>
</div>
<div class="paragraph">
<p>Flags are the bitwise-or of:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1"><code>PARSE_OPT_KEEP_DASHDASH</code></dt>
<dd>
<p>Keep the <code>--</code> that usually separates options from
non-option arguments.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_STOP_AT_NON_OPTION</code></dt>
<dd>
<p>Usually the whole argument vector is massaged and reordered.
Using this flag, processing is stopped at the first non-option
argument.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_KEEP_ARGV0</code></dt>
<dd>
<p>Keep the first argument, which contains the program name. It’s
removed from argv[] by default.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_KEEP_UNKNOWN_OPT</code></dt>
<dd>
<p>Keep unknown options instead of erroring out. This doesn’t
work for all combinations of arguments as users might expect
it to do. E.g. if the first argument in <code>--unknown</code> <code>--known</code>
takes a value (which we can’t know), the second one is
mistakenly interpreted as a known option. Similarly, if
<code>PARSE_OPT_STOP_AT_NON_OPTION</code> is set, the second argument in
<code>--unknown</code> <code>value</code> will be mistakenly interpreted as a
non-option, not as a value belonging to the unknown option,
the parser early. That’s why parse_options() errors out if
both options are set.
Note that non-option arguments are always kept, even without
this flag.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_NO_INTERNAL_HELP</code></dt>
<dd>
<p>By default, parse_options() handles <code>-h</code>, <code>--help</code> and
<code>--help-all</code> internally, by showing a help screen. This option
turns it off and allows one to add custom handlers for these
options, or to just leave them unknown.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_SUBCOMMAND_OPTIONAL</code></dt>
<dd>
<p>Don’t error out when no subcommand is specified.</p>
</dd>
</dl>
</div>
</li>
</ol>
</div>
<div class="paragraph">
<p>Note that <code>PARSE_OPT_STOP_AT_NON_OPTION</code> is incompatible with subcommands;
while <code>PARSE_OPT_KEEP_DASHDASH</code> and <code>PARSE_OPT_KEEP_UNKNOWN_OPT</code> can only be
used with subcommands when combined with <code>PARSE_OPT_SUBCOMMAND_OPTIONAL</code>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_data_structure">Data Structure</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The main data structure is an array of the <code>option</code> struct,
say <code>static</code> <code>struct</code> <code>option</code> <code>builtin_add_options</code>[].
There are some macros to easily define options:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1"><code>OPT__ABBREV</code>(&int_var)</dt>
<dd>
<p>Add <code>--abbrev</code>[<code>=</code><em><n></em>].</p>
</dd>
<dt class="hdlist1"><code>OPT__COLOR</code>(&int_var, <code>description</code>)</dt>
<dd>
<p>Add <code>--color</code>[<code>=</code><em><when></em>] and <code>--no-color</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT__DRY_RUN</code>(&int_var, <code>description</code>)</dt>
<dd>
<p>Add <code>-n,</code> <code>--dry-run</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT__FORCE</code>(&int_var, <code>description</code>)</dt>
<dd>
<p>Add <code>-f,</code> <code>--force</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT__QUIET</code>(&int_var, <code>description</code>)</dt>
<dd>
<p>Add <code>-q,</code> <code>--quiet</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT__VERBOSE</code>(&int_var, <code>description</code>)</dt>
<dd>
<p>Add <code>-v,</code> <code>--verbose</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_GROUP</code>(<code>description</code>)</dt>
<dd>
<p>Start an option group. <code>description</code> is a short string that
describes the group or an empty string.
Start the description with an upper-case letter.</p>
</dd>
<dt class="hdlist1"><code>OPT_BOOL</code>(<code>short,</code> <code>long,</code> &int_var, <code>description</code>)</dt>
<dd>
<p>Introduce a boolean option. <code>int_var</code> is set to one with
<code>--option</code> and set to zero with <code>--no-option</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_COUNTUP</code>(<code>short,</code> <code>long,</code> &int_var, <code>description</code>)</dt>
<dd>
<p>Introduce a count-up option.
Each use of <code>--option</code> increments <code>int_var</code>, starting from zero
(even if initially negative), and <code>--no-option</code> resets it to
zero. To determine if <code>--option</code> or <code>--no-option</code> was encountered at
all, initialize <code>int_var</code> to a negative value, and if it is still
negative after parse_options(), then neither <code>--option</code> nor
<code>--no-option</code> was seen.</p>
</dd>
<dt class="hdlist1"><code>OPT_BIT</code>(<code>short,</code> <code>long,</code> &int_var, <code>description,</code> <code>mask</code>)</dt>
<dd>
<p>Introduce a boolean option.
If used, <code>int_var</code> is bitwise-ored with <code>mask</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_NEGBIT</code>(<code>short,</code> <code>long,</code> &int_var, <code>description,</code> <code>mask</code>)</dt>
<dd>
<p>Introduce a boolean option.
If used, <code>int_var</code> is bitwise-anded with the inverted <code>mask</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_SET_INT</code>(<code>short,</code> <code>long,</code> &int_var, <code>description,</code> <code>integer</code>)</dt>
<dd>
<p>Introduce an integer option.
<code>int_var</code> is set to <code>integer</code> with <code>--option</code>, and
reset to zero with <code>--no-option</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_STRING</code>(<code>short,</code> <code>long,</code> &str_var, <code>arg_str,</code> <code>description</code>)</dt>
<dd>
<p>Introduce an option with string argument.
The string argument is put into <code>str_var</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_STRING_LIST</code>(<code>short,</code> <code>long,</code> &struct <code>string_list,</code> <code>arg_str,</code> <code>description</code>)</dt>
<dd>
<p>Introduce an option with string argument.
The string argument is stored as an element in <code>string_list</code>.
Use of <code>--no-option</code> will clear the list of preceding values.</p>
</dd>
<dt class="hdlist1"><code>OPT_INTEGER</code>(<code>short,</code> <code>long,</code> &int_var, <code>description</code>)</dt>
<dd>
<p>Introduce an option with integer argument. The argument must be a
integer and may include a suffix of <em>k</em>, <em>m</em> or <em>g</em> to
scale the provided value by 1024, 1024^2 or 1024^3 respectively.
The scaled value is put into <code>int_var</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_UNSIGNED</code>(<code>short,</code> <code>long,</code> &unsigned_long_var, <code>description</code>)</dt>
<dd>
<p>Introduce an option with an unsigned integer argument. The argument must be a
non-negative integer and may include a suffix of <em>k</em>, <em>m</em> or <em>g</em> to
scale the provided value by 1024, 1024^2 or 1024^3 respectively.
The scaled value is put into <code>unsigned_long_var</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_EXPIRY_DATE</code>(<code>short,</code> <code>long,</code> &timestamp_t_var, <code>description</code>)</dt>
<dd>
<p>Introduce an option with expiry date argument, see <code>parse_expiry_date</code>().
The timestamp is put into <code>timestamp_t_var</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_CALLBACK</code>(<code>short,</code> <code>long,</code> &var, <code>arg_str,</code> <code>description,</code> <code>func_ptr</code>)</dt>
<dd>
<p>Introduce an option with argument.
The argument will be fed into the function given by <code>func_ptr</code>
and the result will be put into <code>var</code>.
See <em>Option Callbacks</em> below for a more elaborate description.</p>
</dd>
<dt class="hdlist1"><code>OPT_FILENAME</code>(<code>short,</code> <code>long,</code> &var, <code>description</code>)</dt>
<dd>
<p>Introduce an option with a filename argument.
The filename will be prefixed by passing the filename along with
the prefix argument of <code>parse_options</code>() to <code>prefix_filename</code>().</p>
</dd>
<dt class="hdlist1"><code>OPT_NUMBER_CALLBACK</code>(&var, <code>description,</code> <code>func_ptr</code>)</dt>
<dd>
<p>Recognize numerical options like -123 and feed the integer as
if it was an argument to the function given by <code>func_ptr</code>.
The result will be put into <code>var</code>. There can be only one such
option definition. It cannot be negated and it takes no
arguments. Short options that happen to be digits take
precedence over it.</p>
</dd>
<dt class="hdlist1"><code>OPT_COLOR_FLAG</code>(<code>short,</code> <code>long,</code> &int_var, <code>description</code>)</dt>
<dd>
<p>Introduce an option that takes an optional argument that can
have one of three values: "always", "never", or "auto". If the
argument is not given, it defaults to "always". The <code>--no-</code> form
works like <code>--long=never</code>; it cannot take an argument. If
"always", set <code>int_var</code> to 1; if "never", set <code>int_var</code> to 0; if
"auto", set <code>int_var</code> to 1 if stdout is a tty or a pager,
0 otherwise.</p>
</dd>
<dt class="hdlist1"><code>OPT_NOOP_NOARG</code>(<code>short,</code> <code>long</code>)</dt>
<dd>
<p>Introduce an option that has no effect and takes no arguments.
Use it to hide deprecated options that are still to be recognized
and ignored silently.</p>
</dd>
<dt class="hdlist1"><code>OPT_PASSTHRU</code>(<code>short,</code> <code>long,</code> &char_var, <code>arg_str,</code> <code>description,</code> <code>flags</code>)</dt>
<dd>
<p>Introduce an option that will be reconstructed into a char* string,
which must be initialized to NULL. This is useful when you need to
pass the command-line option to another command. Any previous value
will be overwritten, so this should only be used for options where
the last one specified on the command line wins.</p>
</dd>
<dt class="hdlist1"><code>OPT_PASSTHRU_ARGV</code>(<code>short,</code> <code>long,</code> &strvec_var, <code>arg_str,</code> <code>description,</code> <code>flags</code>)</dt>
<dd>
<p>Introduce an option where all instances of it on the command-line will
be reconstructed into a strvec. This is useful when you need to
pass the command-line option, which can be specified multiple times,
to another command.</p>
</dd>
<dt class="hdlist1"><code>OPT_CMDMODE</code>(<code>short,</code> <code>long,</code> &int_var, <code>description,</code> <code>enum_val</code>)</dt>
<dd>
<p>Define an "operation mode" option, only one of which in the same
group of "operating mode" options that share the same <code>int_var</code>
can be given by the user. <code>int_var</code> is set to <code>enum_val</code> when the
option is used, but an error is reported if other "operating mode"
option has already set its value to the same <code>int_var</code>.
In new commands consider using subcommands instead.</p>
</dd>
<dt class="hdlist1"><code>OPT_SUBCOMMAND</code>(<code>long,</code> &fn_ptr, <code>subcommand_fn</code>)</dt>
<dd>
<p>Define a subcommand. <code>subcommand_fn</code> is put into <code>fn_ptr</code> when
this subcommand is used.</p>
</dd>
</dl>
</div>
<div class="paragraph">
<p>The last element of the array must be <code>OPT_END</code>().</p>
</div>
<div class="paragraph">
<p>If not stated otherwise, interpret the arguments as follows:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>short</code> is a character for the short option
(e.g. 'e' for <code>-e</code>, use <code>0</code> to omit),</p>
</li>
<li>
<p><code>long</code> is a string for the long option
(e.g. "example" for <code>--example</code>, use <code>NULL</code> to omit),</p>
</li>
<li>
<p><code>int_var</code> is an integer variable,</p>
</li>
<li>
<p><code>str_var</code> is a string variable (<code>char</code> <code>*</code>),</p>
</li>
<li>
<p><code>arg_str</code> is the string that is shown as argument
(e.g. "branch" will result in <em><branch></em>).
If set to <code>NULL</code>, three dots (<code>...</code>) will be displayed.</p>
</li>
<li>
<p><code>description</code> is a short string to describe the effect of the option.
It shall begin with a lower-case letter and a full stop (.) shall be
omitted at the end.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_option_callbacks">Option Callbacks</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The function must be defined in this form:</p>
</div>
<div class="literalblock">
<div class="content">
<pre>int func(const struct option *opt, const char *arg, int unset)</pre>
</div>
</div>
<div class="paragraph">
<p>The callback mechanism is as follows:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Inside <code>func</code>, the only interesting member of the structure
given by <code>opt</code> is the void pointer <code>opt-</code>><code>value</code>.
<code>*opt-</code>><code>value</code> will be the value that is saved into <code>var</code>, if you
use <code>OPT_CALLBACK</code>().
For example, do <code>*</code>(<code>unsigned</code> <code>long</code> <code>*</code>)<code>opt-</code>><code>value</code> <code>=</code> <code>42</code>; to get 42
into an <code>unsigned</code> <code>long</code> variable.</p>
</li>
<li>
<p>Return value <code>0</code> indicates success and non-zero return
value will invoke <code>usage_with_options</code>() and, thus, die.</p>
</li>
<li>
<p>If the user negates the option, <code>arg</code> is <code>NULL</code> and <code>unset</code> is 1.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_sophisticated_option_parsing">Sophisticated option parsing</h2>
<div class="sectionbody">
<div class="paragraph">
<p>If you need, for example, option callbacks with optional arguments
or without arguments at all, or if you need other special cases,
that are not handled by the macros above, you need to specify the
members of the <code>option</code> structure manually.</p>
</div>
<div class="paragraph">
<p>This is not covered in this document, but well documented
in <code>parse-options.h</code> itself.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">Examples</h2>
<div class="sectionbody">
<div class="paragraph">
<p>See <code>test-parse-options.c</code> and
<code>builtin/add.c</code>,
<code>builtin/clone.c</code>,
<code>builtin/commit.c</code>,
<code>builtin/fetch.c</code>,
<code>builtin/fsck.c</code>,
<code>builtin/rm.c</code>
for real-world examples.</p>
</div>
</div>
</div>
</div>
<div id="footer">
<div id="footer-text">
Last updated 2025-04-24 18:27:36 -0700
</div>
</div>
</body>
</html>