git_config_colorbool: refactor stdout_is_tty handling
[git/git.git] / parse-options.c
CommitLineData
4a59fd13
PH
1#include "git-compat-util.h"
2#include "parse-options.h"
26141b5b 3#include "cache.h"
269defdf 4#include "commit.h"
73e9da01 5#include "color.h"
4a59fd13 6
47e9cd28
TR
7static int parse_options_usage(struct parse_opt_ctx_t *ctx,
8 const char * const *usagestr,
9c7304e3 9 const struct option *opts, int err);
41064ebc 10
4a59fd13
PH
11#define OPT_SHORT 1
12#define OPT_UNSET 2
13
1e5ce570
JN
14static int optbug(const struct option *opt, const char *reason)
15{
16 if (opt->long_name)
17 return error("BUG: option '%s' %s", opt->long_name, reason);
18 return error("BUG: switch '%c' %s", opt->short_name, reason);
19}
20
4a59fd13
PH
21static int opterror(const struct option *opt, const char *reason, int flags)
22{
23 if (flags & OPT_SHORT)
24 return error("switch `%c' %s", opt->short_name, reason);
25 if (flags & OPT_UNSET)
26 return error("option `no-%s' %s", opt->long_name, reason);
27 return error("option `%s' %s", opt->long_name, reason);
28}
29
1cc6985c
PH
30static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
31 int flags, const char **arg)
32{
33 if (p->opt) {
34 *arg = p->opt;
35 p->opt = NULL;
36 } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
37 *arg = (const char *)opt->defval;
d5d745f9 38 } else if (p->argc > 1) {
1cc6985c
PH
39 p->argc--;
40 *arg = *++p->argv;
41 } else
42 return opterror(opt, "requires a value", flags);
43 return 0;
44}
45
df217ed6
SB
46static void fix_filename(const char *prefix, const char **file)
47{
48 if (!file || !*file || !prefix || is_absolute_path(*file)
49 || !strcmp("-", *file))
50 return;
51 *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
52}
53
7e7bbcb4 54static int get_value(struct parse_opt_ctx_t *p,
1cc6985c 55 const struct option *opt, int flags)
4a59fd13 56{
ffe659f9 57 const char *s, *arg;
db7244bd 58 const int unset = flags & OPT_UNSET;
df217ed6 59 int err;
4a59fd13 60
db7244bd 61 if (unset && p->opt)
4a59fd13 62 return opterror(opt, "takes no value", flags);
db7244bd
PH
63 if (unset && (opt->flags & PARSE_OPT_NONEG))
64 return opterror(opt, "isn't available", flags);
c1f4ec9e
SB
65 if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
66 return opterror(opt, "takes no value", flags);
db7244bd 67
db7244bd 68 switch (opt->type) {
b0b3a8b6
JN
69 case OPTION_LOWLEVEL_CALLBACK:
70 return (*(parse_opt_ll_cb *)opt->callback)(p, opt, unset);
71
db7244bd
PH
72 case OPTION_BIT:
73 if (unset)
74 *(int *)opt->value &= ~opt->defval;
4a59fd13 75 else
db7244bd
PH
76 *(int *)opt->value |= opt->defval;
77 return 0;
78
2f4b97f9
RS
79 case OPTION_NEGBIT:
80 if (unset)
81 *(int *)opt->value |= opt->defval;
82 else
83 *(int *)opt->value &= ~opt->defval;
84 return 0;
85
db7244bd
PH
86 case OPTION_BOOLEAN:
87 *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
88 return 0;
89
90 case OPTION_SET_INT:
91 *(int *)opt->value = unset ? 0 : opt->defval;
92 return 0;
93
94 case OPTION_SET_PTR:
95 *(void **)opt->value = unset ? NULL : (void *)opt->defval;
4a59fd13
PH
96 return 0;
97
98 case OPTION_STRING:
1cc6985c 99 if (unset)
db7244bd 100 *(const char **)opt->value = NULL;
1cc6985c 101 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
ffe659f9 102 *(const char **)opt->value = (const char *)opt->defval;
1cc6985c
PH
103 else
104 return get_arg(p, opt, flags, (const char **)opt->value);
4a59fd13
PH
105 return 0;
106
df217ed6
SB
107 case OPTION_FILENAME:
108 err = 0;
109 if (unset)
110 *(const char **)opt->value = NULL;
111 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
112 *(const char **)opt->value = (const char *)opt->defval;
113 else
114 err = get_arg(p, opt, flags, (const char **)opt->value);
115
116 if (!err)
117 fix_filename(p->prefix, (const char **)opt->value);
118 return err;
119
ffe659f9 120 case OPTION_CALLBACK:
db7244bd 121 if (unset)
07fe54db 122 return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
db7244bd 123 if (opt->flags & PARSE_OPT_NOARG)
07fe54db 124 return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
c43a2483 125 if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
07fe54db 126 return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
1cc6985c
PH
127 if (get_arg(p, opt, flags, &arg))
128 return -1;
129 return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
ffe659f9 130
4a59fd13 131 case OPTION_INTEGER:
db7244bd 132 if (unset) {
4a59fd13
PH
133 *(int *)opt->value = 0;
134 return 0;
135 }
c43a2483 136 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
ffe659f9
PH
137 *(int *)opt->value = opt->defval;
138 return 0;
139 }
1cc6985c
PH
140 if (get_arg(p, opt, flags, &arg))
141 return -1;
142 *(int *)opt->value = strtol(arg, (char **)&s, 10);
4a59fd13
PH
143 if (*s)
144 return opterror(opt, "expects a numerical value", flags);
145 return 0;
146
147 default:
148 die("should not happen, someone must be hit on the forehead");
149 }
150}
151
7e7bbcb4 152static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
4a59fd13 153{
e0319ff5
RS
154 const struct option *numopt = NULL;
155
4a59fd13
PH
156 for (; options->type != OPTION_END; options++) {
157 if (options->short_name == *p->opt) {
158 p->opt = p->opt[1] ? p->opt + 1 : NULL;
159 return get_value(p, options, OPT_SHORT);
160 }
e0319ff5
RS
161
162 /*
163 * Handle the numerical option later, explicit one-digit
164 * options take precedence over it.
165 */
166 if (options->type == OPTION_NUMBER)
167 numopt = options;
168 }
169 if (numopt && isdigit(*p->opt)) {
170 size_t len = 1;
171 char *arg;
172 int rc;
173
174 while (isdigit(p->opt[len]))
175 len++;
176 arg = xmemdupz(p->opt, len);
177 p->opt = p->opt[len] ? p->opt + len : NULL;
178 rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
179 free(arg);
180 return rc;
4a59fd13 181 }
07fe54db 182 return -2;
4a59fd13
PH
183}
184
7e7bbcb4 185static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
4a59fd13
PH
186 const struct option *options)
187{
7f275b91 188 const char *arg_end = strchr(arg, '=');
243e0614
JS
189 const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
190 int abbrev_flags = 0, ambiguous_flags = 0;
7f275b91
JS
191
192 if (!arg_end)
193 arg_end = arg + strlen(arg);
194
4a59fd13
PH
195 for (; options->type != OPTION_END; options++) {
196 const char *rest;
197 int flags = 0;
198
199 if (!options->long_name)
200 continue;
201
202 rest = skip_prefix(arg, options->long_name);
580d5bff
PH
203 if (options->type == OPTION_ARGUMENT) {
204 if (!rest)
205 continue;
206 if (*rest == '=')
207 return opterror(options, "takes no value", flags);
208 if (*rest)
209 continue;
210 p->out[p->cpidx++] = arg - 2;
211 return 0;
212 }
4a59fd13 213 if (!rest) {
7f275b91
JS
214 /* abbreviated? */
215 if (!strncmp(options->long_name, arg, arg_end - arg)) {
216is_abbreviated:
243e0614
JS
217 if (abbrev_option) {
218 /*
219 * If this is abbreviated, it is
220 * ambiguous. So when there is no
221 * exact match later, we need to
222 * error out.
223 */
224 ambiguous_option = abbrev_option;
225 ambiguous_flags = abbrev_flags;
226 }
7f275b91
JS
227 if (!(flags & OPT_UNSET) && *arg_end)
228 p->opt = arg_end + 1;
229 abbrev_option = options;
230 abbrev_flags = flags;
231 continue;
232 }
6bbfd1fa
AS
233 /* negation allowed? */
234 if (options->flags & PARSE_OPT_NONEG)
235 continue;
7f275b91
JS
236 /* negated and abbreviated very much? */
237 if (!prefixcmp("no-", arg)) {
238 flags |= OPT_UNSET;
239 goto is_abbreviated;
240 }
241 /* negated? */
4a59fd13
PH
242 if (strncmp(arg, "no-", 3))
243 continue;
244 flags |= OPT_UNSET;
245 rest = skip_prefix(arg + 3, options->long_name);
7f275b91
JS
246 /* abbreviated and negated? */
247 if (!rest && !prefixcmp(options->long_name, arg + 3))
248 goto is_abbreviated;
4a59fd13
PH
249 if (!rest)
250 continue;
251 }
252 if (*rest) {
253 if (*rest != '=')
254 continue;
255 p->opt = rest + 1;
256 }
257 return get_value(p, options, flags);
258 }
243e0614
JS
259
260 if (ambiguous_option)
261 return error("Ambiguous option: %s "
262 "(could be --%s%s or --%s%s)",
263 arg,
264 (ambiguous_flags & OPT_UNSET) ? "no-" : "",
265 ambiguous_option->long_name,
266 (abbrev_flags & OPT_UNSET) ? "no-" : "",
267 abbrev_option->long_name);
7f275b91
JS
268 if (abbrev_option)
269 return get_value(p, abbrev_option, abbrev_flags);
07fe54db 270 return -2;
4a59fd13
PH
271}
272
51a9949e
RS
273static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
274 const struct option *options)
275{
276 for (; options->type != OPTION_END; options++) {
277 if (!(options->flags & PARSE_OPT_NODASH))
278 continue;
51a9949e
RS
279 if (options->short_name == arg[0] && arg[1] == '\0')
280 return get_value(p, options, OPT_SHORT);
281 }
282 return -2;
283}
284
1121a878 285static void check_typos(const char *arg, const struct option *options)
3a9f0f41
PH
286{
287 if (strlen(arg) < 3)
288 return;
289
290 if (!prefixcmp(arg, "no-")) {
291 error ("did you mean `--%s` (with two dashes ?)", arg);
292 exit(129);
293 }
294
295 for (; options->type != OPTION_END; options++) {
296 if (!options->long_name)
297 continue;
298 if (!prefixcmp(options->long_name, arg)) {
299 error ("did you mean `--%s` (with two dashes ?)", arg);
300 exit(129);
301 }
302 }
303}
304
cb9d398c
PH
305static void parse_options_check(const struct option *opts)
306{
307 int err = 0;
308
309 for (; opts->type != OPTION_END; opts++) {
310 if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
1e5ce570
JN
311 (opts->flags & PARSE_OPT_OPTARG))
312 err |= optbug(opts, "uses incompatible flags "
313 "LASTARG_DEFAULT and OPTARG");
a02dd4ff
JN
314 if (opts->flags & PARSE_OPT_NODASH &&
315 ((opts->flags & PARSE_OPT_OPTARG) ||
316 !(opts->flags & PARSE_OPT_NOARG) ||
317 !(opts->flags & PARSE_OPT_NONEG) ||
318 opts->long_name))
319 err |= optbug(opts, "uses feature "
320 "not supported for dashless options");
5c400ed2
JN
321 switch (opts->type) {
322 case OPTION_BOOLEAN:
323 case OPTION_BIT:
324 case OPTION_NEGBIT:
325 case OPTION_SET_INT:
326 case OPTION_SET_PTR:
327 case OPTION_NUMBER:
328 if ((opts->flags & PARSE_OPT_OPTARG) ||
329 !(opts->flags & PARSE_OPT_NOARG))
330 err |= optbug(opts, "should not accept an argument");
331 default:
332 ; /* ok. (usually accepts an argument) */
333 }
cb9d398c 334 }
cb9d398c 335 if (err)
1e5ce570 336 exit(128);
cb9d398c
PH
337}
338
7e7bbcb4 339void parse_options_start(struct parse_opt_ctx_t *ctx,
37782920 340 int argc, const char **argv, const char *prefix,
9ca1169f 341 const struct option *options, int flags)
7e7bbcb4
PH
342{
343 memset(ctx, 0, sizeof(*ctx));
344 ctx->argc = argc - 1;
345 ctx->argv = argv + 1;
346 ctx->out = argv;
37782920 347 ctx->prefix = prefix;
a32a4eaa 348 ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
7e7bbcb4 349 ctx->flags = flags;
0d260f9a
RS
350 if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
351 (flags & PARSE_OPT_STOP_AT_NON_OPTION))
352 die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
9ca1169f 353 parse_options_check(options);
7e7bbcb4
PH
354}
355
47e9cd28
TR
356static int usage_with_options_internal(struct parse_opt_ctx_t *,
357 const char * const *,
9c7304e3 358 const struct option *, int, int);
dd3bf0f4 359
ff43ec3e
PH
360int parse_options_step(struct parse_opt_ctx_t *ctx,
361 const struct option *options,
362 const char * const usagestr[])
4a59fd13 363{
b92891f9
RS
364 int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
365
26141b5b
PH
366 /* we must reset ->opt, unknown short option leave it dangling */
367 ctx->opt = NULL;
368
ff43ec3e
PH
369 for (; ctx->argc; ctx->argc--, ctx->argv++) {
370 const char *arg = ctx->argv[0];
4a59fd13
PH
371
372 if (*arg != '-' || !arg[1]) {
51a9949e
RS
373 if (parse_nodash_opt(ctx, arg, options) == 0)
374 continue;
ff43ec3e 375 if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
979240fe 376 return PARSE_OPT_NON_OPTION;
ff43ec3e 377 ctx->out[ctx->cpidx++] = ctx->argv[0];
4a59fd13
PH
378 continue;
379 }
380
381 if (arg[1] != '-') {
ff43ec3e 382 ctx->opt = arg + 1;
b92891f9 383 if (internal_help && *ctx->opt == 'h')
47e9cd28 384 return parse_options_usage(ctx, usagestr, options, 0);
07fe54db
PH
385 switch (parse_short_opt(ctx, options)) {
386 case -1:
47e9cd28 387 return parse_options_usage(ctx, usagestr, options, 1);
07fe54db 388 case -2:
b5ce3a54 389 goto unknown;
07fe54db 390 }
ff43ec3e 391 if (ctx->opt)
3a9f0f41 392 check_typos(arg + 1, options);
ff43ec3e 393 while (ctx->opt) {
b92891f9 394 if (internal_help && *ctx->opt == 'h')
47e9cd28 395 return parse_options_usage(ctx, usagestr, options, 0);
07fe54db
PH
396 switch (parse_short_opt(ctx, options)) {
397 case -1:
47e9cd28 398 return parse_options_usage(ctx, usagestr, options, 1);
07fe54db 399 case -2:
26141b5b
PH
400 /* fake a short option thing to hide the fact that we may have
401 * started to parse aggregated stuff
402 *
403 * This is leaky, too bad.
404 */
405 ctx->argv[0] = xstrdup(ctx->opt - 1);
406 *(char *)ctx->argv[0] = '-';
b5ce3a54 407 goto unknown;
07fe54db 408 }
3a9f0f41 409 }
4a59fd13
PH
410 continue;
411 }
412
413 if (!arg[2]) { /* "--" */
ff43ec3e
PH
414 if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
415 ctx->argc--;
416 ctx->argv++;
4a59fd13
PH
417 }
418 break;
419 }
420
b92891f9 421 if (internal_help && !strcmp(arg + 2, "help-all"))
47e9cd28 422 return usage_with_options_internal(ctx, usagestr, options, 1, 0);
b92891f9 423 if (internal_help && !strcmp(arg + 2, "help"))
47e9cd28 424 return parse_options_usage(ctx, usagestr, options, 0);
07fe54db
PH
425 switch (parse_long_opt(ctx, arg + 2, options)) {
426 case -1:
47e9cd28 427 return parse_options_usage(ctx, usagestr, options, 1);
07fe54db 428 case -2:
b5ce3a54 429 goto unknown;
07fe54db 430 }
b5ce3a54
RS
431 continue;
432unknown:
433 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
434 return PARSE_OPT_UNKNOWN;
435 ctx->out[ctx->cpidx++] = ctx->argv[0];
436 ctx->opt = NULL;
ff43ec3e
PH
437 }
438 return PARSE_OPT_DONE;
439}
440
441int parse_options_end(struct parse_opt_ctx_t *ctx)
442{
443 memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
444 ctx->out[ctx->cpidx + ctx->argc] = NULL;
445 return ctx->cpidx + ctx->argc;
446}
447
37782920
SB
448int parse_options(int argc, const char **argv, const char *prefix,
449 const struct option *options, const char * const usagestr[],
450 int flags)
ff43ec3e
PH
451{
452 struct parse_opt_ctx_t ctx;
453
9ca1169f 454 parse_options_start(&ctx, argc, argv, prefix, options, flags);
ff43ec3e
PH
455 switch (parse_options_step(&ctx, options, usagestr)) {
456 case PARSE_OPT_HELP:
457 exit(129);
979240fe 458 case PARSE_OPT_NON_OPTION:
ff43ec3e
PH
459 case PARSE_OPT_DONE:
460 break;
461 default: /* PARSE_OPT_UNKNOWN */
07fe54db
PH
462 if (ctx.argv[0][1] == '-') {
463 error("unknown option `%s'", ctx.argv[0] + 2);
464 } else {
465 error("unknown switch `%c'", *ctx.opt);
466 }
467 usage_with_options(usagestr, options);
4a59fd13
PH
468 }
469
7e7bbcb4 470 return parse_options_end(&ctx);
4a59fd13 471}
d7a38c54 472
9c7304e3 473static int usage_argh(const struct option *opts, FILE *outfile)
29f25d49
SB
474{
475 const char *s;
34aec9f5 476 int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
29f25d49
SB
477 if (opts->flags & PARSE_OPT_OPTARG)
478 if (opts->long_name)
479 s = literal ? "[=%s]" : "[=<%s>]";
480 else
481 s = literal ? "[%s]" : "[<%s>]";
482 else
483 s = literal ? " %s" : " <%s>";
9c7304e3 484 return fprintf(outfile, s, opts->argh ? opts->argh : "...");
29f25d49
SB
485}
486
d7a38c54
PH
487#define USAGE_OPTS_WIDTH 24
488#define USAGE_GAP 2
489
47e9cd28
TR
490static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
491 const char * const *usagestr,
492 const struct option *opts, int full, int err)
d7a38c54 493{
9c7304e3
GS
494 FILE *outfile = err ? stderr : stdout;
495
49b61802
RS
496 if (!usagestr)
497 return PARSE_OPT_HELP;
498
47e9cd28
TR
499 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
500 fprintf(outfile, "cat <<\\EOF\n");
501
9c7304e3 502 fprintf(outfile, "usage: %s\n", *usagestr++);
f389c808 503 while (*usagestr && **usagestr)
9c7304e3 504 fprintf(outfile, " or: %s\n", *usagestr++);
44d86e91 505 while (*usagestr) {
9c7304e3 506 fprintf(outfile, "%s%s\n",
44d86e91
JK
507 **usagestr ? " " : "",
508 *usagestr);
509 usagestr++;
510 }
d7a38c54
PH
511
512 if (opts->type != OPTION_GROUP)
9c7304e3 513 fputc('\n', outfile);
d7a38c54
PH
514
515 for (; opts->type != OPTION_END; opts++) {
516 size_t pos;
517 int pad;
518
519 if (opts->type == OPTION_GROUP) {
9c7304e3 520 fputc('\n', outfile);
d7a38c54 521 if (*opts->help)
9c7304e3 522 fprintf(outfile, "%s\n", opts->help);
d7a38c54
PH
523 continue;
524 }
dd3bf0f4
PH
525 if (!full && (opts->flags & PARSE_OPT_HIDDEN))
526 continue;
d7a38c54 527
9c7304e3 528 pos = fprintf(outfile, " ");
86b5efb2 529 if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
51a9949e 530 if (opts->flags & PARSE_OPT_NODASH)
9c7304e3 531 pos += fprintf(outfile, "%c", opts->short_name);
51a9949e 532 else
9c7304e3 533 pos += fprintf(outfile, "-%c", opts->short_name);
51a9949e 534 }
d7a38c54 535 if (opts->long_name && opts->short_name)
9c7304e3 536 pos += fprintf(outfile, ", ");
d7a38c54 537 if (opts->long_name)
9c7304e3 538 pos += fprintf(outfile, "--%s%s",
86b5efb2
JS
539 (opts->flags & PARSE_OPT_NEGHELP) ? "no-" : "",
540 opts->long_name);
e0319ff5 541 if (opts->type == OPTION_NUMBER)
9c7304e3 542 pos += fprintf(outfile, "-NUM");
d7a38c54 543
b57c68a6
JN
544 if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
545 !(opts->flags & PARSE_OPT_NOARG))
9c7304e3 546 pos += usage_argh(opts, outfile);
d7a38c54 547
f389c808
AR
548 if (pos <= USAGE_OPTS_WIDTH)
549 pad = USAGE_OPTS_WIDTH - pos;
d7a38c54 550 else {
9c7304e3 551 fputc('\n', outfile);
d7a38c54
PH
552 pad = USAGE_OPTS_WIDTH;
553 }
9c7304e3 554 fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
d7a38c54 555 }
9c7304e3 556 fputc('\n', outfile);
f389c808 557
47e9cd28
TR
558 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
559 fputs("EOF\n", outfile);
560
ee68b87a 561 return PARSE_OPT_HELP;
d7a38c54 562}
0ce865b1 563
c2e86add 564void NORETURN usage_with_options(const char * const *usagestr,
ff43ec3e 565 const struct option *opts)
dd3bf0f4 566{
47e9cd28 567 usage_with_options_internal(NULL, usagestr, opts, 0, 1);
ff43ec3e 568 exit(129);
dd3bf0f4
PH
569}
570
c2e86add 571void NORETURN usage_msg_opt(const char *msg,
451bb210
CC
572 const char * const *usagestr,
573 const struct option *options)
574{
575 fprintf(stderr, "%s\n\n", msg);
576 usage_with_options(usagestr, options);
577}
578
47e9cd28
TR
579static int parse_options_usage(struct parse_opt_ctx_t *ctx,
580 const char * const *usagestr,
9c7304e3 581 const struct option *opts, int err)
ee68b87a 582{
47e9cd28 583 return usage_with_options_internal(ctx, usagestr, opts, 0, err);
ee68b87a
PH
584}
585
586
0ce865b1
PH
587/*----- some often used options -----*/
588#include "cache.h"
db7244bd 589
0ce865b1
PH
590int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
591{
592 int v;
593
594 if (!arg) {
595 v = unset ? 0 : DEFAULT_ABBREV;
596 } else {
597 v = strtol(arg, (char **)&arg, 10);
598 if (*arg)
599 return opterror(opt, "expects a numerical value", 0);
600 if (v && v < MINIMUM_ABBREV)
601 v = MINIMUM_ABBREV;
602 else if (v > 40)
603 v = 40;
604 }
605 *(int *)(opt->value) = v;
606 return 0;
607}
1f4a711a
MB
608
609int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
610 int unset)
611{
612 *(unsigned long *)(opt->value) = approxidate(arg);
613 return 0;
614}
dbd0f5c7 615
73e9da01
ML
616int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
617 int unset)
618{
619 int value;
620
621 if (!arg)
622 arg = unset ? "never" : (const char *)opt->defval;
e269eb79 623 value = git_config_colorbool(NULL, arg);
73e9da01
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624 if (value < 0)
625 return opterror(opt,
626 "expects \"always\", \"auto\", or \"never\"", 0);
627 *(int *)opt->value = value;
628 return 0;
629}
630
7f87aff2
TA
631int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
632 int unset)
633{
634 int *target = opt->value;
635
636 if (unset)
637 /* --no-quiet, --no-verbose */
638 *target = 0;
639 else if (opt->short_name == 'v') {
640 if (*target >= 0)
641 (*target)++;
642 else
643 *target = 1;
644 } else {
645 if (*target <= 0)
646 (*target)--;
647 else
648 *target = -1;
649 }
650 return 0;
651}
652
269defdf
JG
653int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
654{
655 unsigned char sha1[20];
656 struct commit *commit;
657
658 if (!arg)
659 return -1;
660 if (get_sha1(arg, sha1))
661 return error("malformed object name %s", arg);
662 commit = lookup_commit_reference(sha1);
663 if (!commit)
664 return error("no such commit %s", arg);
665 commit_list_insert(commit, opt->value);
666 return 0;
667}
cb6020bb
JH
668
669int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
670{
671 int *target = opt->value;
672 *target = unset ? 2 : 1;
673 return 0;
674}
8b74d75c
JH
675
676int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
677{
678 int i, j;
679
680 for (i = 0; i < dst_size; i++)
681 if (dst[i].type == OPTION_END)
682 break;
683 for (j = 0; i < dst_size; i++, j++) {
684 dst[i] = src[j];
685 if (src[j].type == OPTION_END)
686 return 0;
687 }
688 return -1;
689}