update-index --split-index: do not split if $GIT_DIR is read only
[git/git.git] / builtin / rev-parse.c
CommitLineData
178cb243
LT
1/*
2 * rev-parse.c
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
a8be83fe 7#include "commit.h"
960bba0d 8#include "refs.h"
c1babb1d 9#include "quote.h"
895f10c3 10#include "builtin.h"
21d47835 11#include "parse-options.h"
9dc01bf0
JH
12#include "diff.h"
13#include "revision.h"
a8be83fe 14
4866ccf0
JH
15#define DO_REVS 1
16#define DO_NOREV 2
17#define DO_FLAGS 4
18#define DO_NONFLAGS 8
19static int filter = ~0;
20
96f1e58f 21static const char *def;
023d66ed 22
042a4ed7
LT
23#define NORMAL 0
24#define REVERSED 1
25static int show_type = NORMAL;
a6d97d49
JH
26
27#define SHOW_SYMBOLIC_ASIS 1
28#define SHOW_SYMBOLIC_FULL 2
96f1e58f
DR
29static int symbolic;
30static int abbrev;
a45d3469
BW
31static int abbrev_ref;
32static int abbrev_ref_strict;
96f1e58f 33static int output_sq;
4866ccf0 34
f8c87212 35static int stuck_long;
9dc01bf0 36static struct string_list *ref_excludes;
f8c87212 37
921d865e
LT
38/*
39 * Some arguments are relevant "revision" arguments,
40 * others are about output format or other details.
41 * This sorts it all out.
42 */
43static int is_rev_argument(const char *arg)
44{
45 static const char *rev_args[] = {
e091eb93 46 "--all",
4866ccf0 47 "--bisect",
5a83f3be 48 "--dense",
b09fe971 49 "--branches=",
a62be77f 50 "--branches",
4866ccf0 51 "--header",
cc243c3c 52 "--ignore-missing",
921d865e 53 "--max-age=",
4866ccf0 54 "--max-count=",
4866ccf0 55 "--min-age=",
5ccfb758 56 "--no-merges",
ad5aeede
MG
57 "--min-parents=",
58 "--no-min-parents",
59 "--max-parents=",
60 "--no-max-parents",
4866ccf0 61 "--objects",
c6496575 62 "--objects-edge",
4866ccf0
JH
63 "--parents",
64 "--pretty",
b09fe971 65 "--remotes=",
a62be77f 66 "--remotes",
d08bae7e 67 "--glob=",
5a83f3be 68 "--sparse",
b09fe971 69 "--tags=",
a62be77f 70 "--tags",
4866ccf0 71 "--topo-order",
4c8725f1 72 "--date-order",
4866ccf0 73 "--unpacked",
921d865e
LT
74 NULL
75 };
76 const char **p = rev_args;
77
8233340c
EW
78 /* accept -<digit>, like traditional "head" */
79 if ((*arg == '-') && isdigit(arg[1]))
80 return 1;
81
921d865e
LT
82 for (;;) {
83 const char *str = *p++;
84 int len;
85 if (!str)
86 return 0;
87 len = strlen(str);
4866ccf0
JH
88 if (!strcmp(arg, str) ||
89 (str[len-1] == '=' && !strncmp(arg, str, len)))
921d865e
LT
90 return 1;
91 }
92}
93
4866ccf0 94/* Output argument as a string, either SQ or normal */
5bb2c65a
JH
95static void show(const char *arg)
96{
97 if (output_sq) {
98 int sq = '\'', ch;
99
100 putchar(sq);
101 while ((ch = *arg++)) {
102 if (ch == sq)
103 fputs("'\\'", stdout);
104 putchar(ch);
105 }
106 putchar(sq);
107 putchar(' ');
108 }
109 else
110 puts(arg);
111}
112
e00f3790
JS
113/* Like show(), but with a negation prefix according to type */
114static void show_with_type(int type, const char *arg)
115{
116 if (type != show_type)
117 putchar('^');
118 show(arg);
119}
120
4866ccf0 121/* Output a revision, only if filter allows it */
30b96fce 122static void show_rev(int type, const unsigned char *sha1, const char *name)
023d66ed 123{
4866ccf0 124 if (!(filter & DO_REVS))
023d66ed 125 return;
4866ccf0 126 def = NULL;
5bb2c65a 127
a45d3469
BW
128 if ((symbolic || abbrev_ref) && name) {
129 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
a6d97d49
JH
130 unsigned char discard[20];
131 char *full;
132
133 switch (dwim_ref(name, strlen(name), discard, &full)) {
134 case 0:
135 /*
136 * Not found -- not a ref. We could
137 * emit "name" here, but symbolic-full
138 * users are interested in finding the
139 * refs spelled in full, and they would
140 * need to filter non-refs if we did so.
141 */
142 break;
143 case 1: /* happy */
a45d3469
BW
144 if (abbrev_ref)
145 full = shorten_unambiguous_ref(full,
146 abbrev_ref_strict);
e00f3790 147 show_with_type(type, full);
a6d97d49
JH
148 break;
149 default: /* ambiguous */
150 error("refname '%s' is ambiguous", name);
151 break;
152 }
153 } else {
e00f3790 154 show_with_type(type, name);
a6d97d49
JH
155 }
156 }
d5012508 157 else if (abbrev)
e00f3790 158 show_with_type(type, find_unique_abbrev(sha1, abbrev));
30b96fce 159 else
e00f3790 160 show_with_type(type, sha1_to_hex(sha1));
023d66ed
LT
161}
162
4866ccf0 163/* Output a flag, only if filter allows it. */
16cee38a 164static int show_flag(const char *arg)
023d66ed 165{
4866ccf0 166 if (!(filter & DO_FLAGS))
9523a4c2
LT
167 return 0;
168 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
0360e99d 169 show(arg);
9523a4c2
LT
170 return 1;
171 }
172 return 0;
023d66ed
LT
173}
174
dfd1b749 175static int show_default(void)
023d66ed 176{
16cee38a 177 const char *s = def;
023d66ed
LT
178
179 if (s) {
180 unsigned char sha1[20];
181
182 def = NULL;
9938af6a 183 if (!get_sha1(s, sha1)) {
30b96fce 184 show_rev(NORMAL, sha1, s);
dfd1b749 185 return 1;
023d66ed 186 }
023d66ed 187 }
dfd1b749 188 return 0;
023d66ed
LT
189}
190
8da19775 191static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
960bba0d 192{
9dc01bf0
JH
193 if (ref_excluded(ref_excludes, refname))
194 return 0;
30b96fce 195 show_rev(NORMAL, sha1, refname);
960bba0d
LT
196 return 0;
197}
198
ad3f9a71
LT
199static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
200{
201 show_rev(REVERSED, sha1, refname);
202 return 0;
203}
204
957d7406
JH
205static int show_abbrev(const unsigned char *sha1, void *cb_data)
206{
207 show_rev(NORMAL, sha1, NULL);
208 return 0;
209}
210
c1babb1d
LT
211static void show_datestring(const char *flag, const char *datestr)
212{
c1babb1d 213 static char buffer[100];
c1babb1d
LT
214
215 /* date handling requires both flags and revs */
216 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
217 return;
3c07b1d1 218 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
c1babb1d
LT
219 show(buffer);
220}
221
12b9d327 222static int show_file(const char *arg, int output_prefix)
7a3dd472 223{
7b34c2fa 224 show_default();
9ad0a933 225 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
12b9d327
JK
226 if (output_prefix) {
227 const char *prefix = startup_info->prefix;
228 show(prefix_filename(prefix,
229 prefix ? strlen(prefix) : 0,
230 arg));
231 } else
232 show(arg);
9ad0a933
LT
233 return 1;
234 }
235 return 0;
7a3dd472
LT
236}
237
b7d936b2 238static int try_difference(const char *arg)
3dd4e732
SB
239{
240 char *dotdot;
241 unsigned char sha1[20];
242 unsigned char end[20];
243 const char *next;
244 const char *this;
245 int symmetric;
003c84f6 246 static const char head_by_default[] = "HEAD";
3dd4e732
SB
247
248 if (!(dotdot = strstr(arg, "..")))
249 return 0;
250 next = dotdot + 2;
251 this = arg;
252 symmetric = (*next == '.');
253
254 *dotdot = 0;
255 next += symmetric;
256
257 if (!*next)
003c84f6 258 next = head_by_default;
3dd4e732 259 if (dotdot == arg)
003c84f6
JH
260 this = head_by_default;
261
262 if (this == head_by_default && next == head_by_default &&
263 !symmetric) {
264 /*
265 * Just ".."? That is not a range but the
266 * pathspec for the parent directory.
267 */
268 *dotdot = '.';
269 return 0;
270 }
271
c036c4c5 272 if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
3dd4e732
SB
273 show_rev(NORMAL, end, next);
274 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
275 if (symmetric) {
276 struct commit_list *exclude;
277 struct commit *a, *b;
278 a = lookup_commit_reference(sha1);
279 b = lookup_commit_reference(end);
280 exclude = get_merge_bases(a, b, 1);
281 while (exclude) {
282 struct commit_list *n = exclude->next;
283 show_rev(REVERSED,
284 exclude->item->object.sha1,NULL);
285 free(exclude);
286 exclude = n;
287 }
288 }
62f162f8 289 *dotdot = '.';
3dd4e732
SB
290 return 1;
291 }
292 *dotdot = '.';
293 return 0;
294}
295
2122f8b9
BS
296static int try_parent_shorthands(const char *arg)
297{
298 char *dotdot;
299 unsigned char sha1[20];
300 struct commit *commit;
301 struct commit_list *parents;
302 int parents_only;
303
304 if ((dotdot = strstr(arg, "^!")))
305 parents_only = 0;
306 else if ((dotdot = strstr(arg, "^@")))
307 parents_only = 1;
308
309 if (!dotdot || dotdot[2])
310 return 0;
311
312 *dotdot = 0;
62f162f8
JK
313 if (get_sha1_committish(arg, sha1)) {
314 *dotdot = '^';
2122f8b9 315 return 0;
62f162f8 316 }
2122f8b9
BS
317
318 if (!parents_only)
319 show_rev(NORMAL, sha1, arg);
320 commit = lookup_commit_reference(sha1);
321 for (parents = commit->parents; parents; parents = parents->next)
322 show_rev(parents_only ? NORMAL : REVERSED,
323 parents->item->object.sha1, arg);
324
62f162f8 325 *dotdot = '^';
2122f8b9
BS
326 return 1;
327}
328
21d47835
PH
329static int parseopt_dump(const struct option *o, const char *arg, int unset)
330{
331 struct strbuf *parsed = o->value;
332 if (unset)
333 strbuf_addf(parsed, " --no-%s", o->long_name);
f8c87212 334 else if (o->short_name && (o->long_name == NULL || !stuck_long))
21d47835
PH
335 strbuf_addf(parsed, " -%c", o->short_name);
336 else
337 strbuf_addf(parsed, " --%s", o->long_name);
338 if (arg) {
f8c87212
NV
339 if (!stuck_long)
340 strbuf_addch(parsed, ' ');
341 else if (o->long_name)
342 strbuf_addch(parsed, '=');
21d47835
PH
343 sq_quote_buf(parsed, arg);
344 }
345 return 0;
346}
347
348static const char *skipspaces(const char *s)
349{
350 while (isspace(*s))
351 s++;
352 return s;
353}
354
355static int cmd_parseopt(int argc, const char **argv, const char *prefix)
356{
6e0800ef 357 static int keep_dashdash = 0, stop_at_non_option = 0;
21d47835 358 static char const * const parseopt_usage[] = {
2c7c184c 359 N_("git rev-parse --parseopt [options] -- [<args>...]"),
21d47835
PH
360 NULL
361 };
362 static struct option parseopt_opts[] = {
d5d09d47 363 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
2c7c184c 364 N_("keep the `--` passed as an arg")),
d5d09d47 365 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
2c7c184c
NTND
366 N_("stop parsing after the "
367 "first non-option argument")),
f8c87212
NV
368 OPT_BOOL(0, "stuck-long", &stuck_long,
369 N_("output in stuck long form")),
21d47835
PH
370 OPT_END(),
371 };
372
f285a2d7 373 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
21d47835
PH
374 const char **usage = NULL;
375 struct option *opts = NULL;
376 int onb = 0, osz = 0, unb = 0, usz = 0;
377
21d47835 378 strbuf_addstr(&parsed, "set --");
37782920 379 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
21d47835
PH
380 PARSE_OPT_KEEP_DASHDASH);
381 if (argc < 1 || strcmp(argv[0], "--"))
382 usage_with_options(parseopt_usage, parseopt_opts);
383
21d47835
PH
384 /* get the usage up to the first line with a -- on it */
385 for (;;) {
386 if (strbuf_getline(&sb, stdin, '\n') == EOF)
387 die("premature end of input");
388 ALLOC_GROW(usage, unb + 1, usz);
389 if (!strcmp("--", sb.buf)) {
390 if (unb < 1)
391 die("no usage string given before the `--' separator");
392 usage[unb] = NULL;
393 break;
394 }
395 usage[unb++] = strbuf_detach(&sb, NULL);
396 }
397
9bab5b60 398 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
21d47835
PH
399 while (strbuf_getline(&sb, stdin, '\n') != EOF) {
400 const char *s;
9bab5b60 401 const char *end;
21d47835
PH
402 struct option *o;
403
404 if (!sb.len)
405 continue;
406
407 ALLOC_GROW(opts, onb + 1, osz);
408 memset(opts + onb, 0, sizeof(opts[onb]));
409
410 o = &opts[onb++];
411 s = strchr(sb.buf, ' ');
412 if (!s || *sb.buf == ' ') {
413 o->type = OPTION_GROUP;
e1033436 414 o->help = xstrdup(skipspaces(sb.buf));
21d47835
PH
415 continue;
416 }
417
418 o->type = OPTION_CALLBACK;
419 o->help = xstrdup(skipspaces(s));
420 o->value = &parsed;
ff962a3f 421 o->flags = PARSE_OPT_NOARG;
21d47835 422 o->callback = &parseopt_dump;
9bab5b60
IB
423
424 /* Possible argument name hint */
425 end = s;
426 while (s > sb.buf && strchr("*=?!", s[-1]) == NULL)
427 --s;
428 if (s != sb.buf && s != end)
429 o->argh = xmemdupz(s, end - s);
430 if (s == sb.buf)
431 s = end;
432
ff962a3f
PH
433 while (s > sb.buf && strchr("*=?!", s[-1])) {
434 switch (*--s) {
435 case '=':
436 o->flags &= ~PARSE_OPT_NOARG;
437 break;
438 case '?':
439 o->flags &= ~PARSE_OPT_NOARG;
440 o->flags |= PARSE_OPT_OPTARG;
441 break;
442 case '!':
443 o->flags |= PARSE_OPT_NONEG;
444 break;
445 case '*':
446 o->flags |= PARSE_OPT_HIDDEN;
447 break;
448 }
21d47835
PH
449 }
450
451 if (s - sb.buf == 1) /* short option only */
452 o->short_name = *sb.buf;
453 else if (sb.buf[1] != ',') /* long option only */
454 o->long_name = xmemdupz(sb.buf, s - sb.buf);
455 else {
456 o->short_name = *sb.buf;
457 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
458 }
459 }
460 strbuf_release(&sb);
461
462 /* put an OPT_END() */
463 ALLOC_GROW(opts, onb + 1, osz);
464 memset(opts + onb, 0, sizeof(opts[onb]));
37782920 465 argc = parse_options(argc, argv, prefix, opts, usage,
29981380 466 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
fcd91f8d 467 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
47e9cd28 468 PARSE_OPT_SHELL_EVAL);
21d47835
PH
469
470 strbuf_addf(&parsed, " --");
b319ce4c 471 sq_quote_argv(&parsed, argv, 0);
21d47835
PH
472 puts(parsed.buf);
473 return 0;
474}
475
50325377
CC
476static int cmd_sq_quote(int argc, const char **argv)
477{
478 struct strbuf buf = STRBUF_INIT;
479
480 if (argc)
481 sq_quote_argv(&buf, argv, 0);
482 printf("%s\n", buf.buf);
483 strbuf_release(&buf);
484
485 return 0;
486}
487
b1b35969
CC
488static void die_no_single_rev(int quiet)
489{
490 if (quiet)
491 exit(1);
492 else
493 die("Needed a single revision");
494}
495
7006b5be 496static const char builtin_rev_parse_usage[] =
2c7c184c
NTND
497N_("git rev-parse --parseopt [options] -- [<args>...]\n"
498 " or: git rev-parse --sq-quote [<arg>...]\n"
499 " or: git rev-parse [options] [<arg>...]\n"
500 "\n"
501 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
7006b5be 502
a633fca0 503int cmd_rev_parse(int argc, const char **argv, const char *prefix)
178cb243 504{
dfd1b749 505 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
14185673 506 int has_dashdash = 0;
12b9d327 507 int output_prefix = 0;
178cb243 508 unsigned char sha1[20];
dfd1b749 509 const char *name = NULL;
a62be77f 510
21d47835
PH
511 if (argc > 1 && !strcmp("--parseopt", argv[1]))
512 return cmd_parseopt(argc - 1, argv + 1, prefix);
513
50325377
CC
514 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
515 return cmd_sq_quote(argc - 2, argv + 2);
516
7006b5be
JN
517 if (argc > 1 && !strcmp("-h", argv[1]))
518 usage(builtin_rev_parse_usage);
519
14185673
JK
520 for (i = 1; i < argc; i++) {
521 if (!strcmp(argv[i], "--")) {
522 has_dashdash = 1;
523 break;
524 }
525 }
526
5410a02a 527 prefix = setup_git_directory();
ef90d6d4 528 git_config(git_default_config, NULL);
178cb243 529 for (i = 1; i < argc; i++) {
16cee38a 530 const char *arg = argv[i];
fb18a2ed 531
178cb243 532 if (as_is) {
12b9d327 533 if (show_file(arg, output_prefix) && as_is < 2)
023e37c3 534 verify_filename(prefix, arg, 0);
178cb243
LT
535 continue;
536 }
3af06987
EW
537 if (!strcmp(arg,"-n")) {
538 if (++i >= argc)
539 die("-n requires an argument");
540 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
541 show(arg);
542 show(argv[i]);
543 }
544 continue;
545 }
59556548 546 if (starts_with(arg, "-n")) {
3af06987
EW
547 if ((filter & DO_FLAGS) && (filter & DO_REVS))
548 show(arg);
549 continue;
550 }
551
178cb243
LT
552 if (*arg == '-') {
553 if (!strcmp(arg, "--")) {
fb18a2ed 554 as_is = 2;
a08b6505
LT
555 /* Pass on the "--" if we show anything but files.. */
556 if (filter & (DO_FLAGS | DO_REVS))
12b9d327 557 show_file(arg, 0);
4866ccf0 558 continue;
178cb243
LT
559 }
560 if (!strcmp(arg, "--default")) {
a43219f2
DS
561 def = argv[++i];
562 if (!def)
563 die("--default requires an argument");
178cb243
LT
564 continue;
565 }
12b9d327 566 if (!strcmp(arg, "--prefix")) {
a43219f2
DS
567 prefix = argv[++i];
568 if (!prefix)
569 die("--prefix requires an argument");
12b9d327
JK
570 startup_info->prefix = prefix;
571 output_prefix = 1;
12b9d327
JK
572 continue;
573 }
8ebb0184 574 if (!strcmp(arg, "--revs-only")) {
4866ccf0 575 filter &= ~DO_NOREV;
8ebb0184
LT
576 continue;
577 }
578 if (!strcmp(arg, "--no-revs")) {
4866ccf0 579 filter &= ~DO_REVS;
8ebb0184
LT
580 continue;
581 }
f79b65aa 582 if (!strcmp(arg, "--flags")) {
4866ccf0 583 filter &= ~DO_NONFLAGS;
f79b65aa
LT
584 continue;
585 }
586 if (!strcmp(arg, "--no-flags")) {
4866ccf0 587 filter &= ~DO_FLAGS;
f79b65aa
LT
588 continue;
589 }
023d66ed 590 if (!strcmp(arg, "--verify")) {
4866ccf0
JH
591 filter &= ~(DO_FLAGS|DO_NOREV);
592 verify = 1;
023d66ed 593 continue;
921d865e 594 }
b1b35969
CC
595 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
596 quiet = 1;
597 continue;
598 }
62a604ba 599 if (!strcmp(arg, "--short") ||
59556548 600 starts_with(arg, "--short=")) {
d5012508
JH
601 filter &= ~(DO_FLAGS|DO_NOREV);
602 verify = 1;
603 abbrev = DEFAULT_ABBREV;
44de0da4
JF
604 if (arg[7] == '=')
605 abbrev = strtoul(arg + 8, NULL, 10);
1dc4fb84
JH
606 if (abbrev < MINIMUM_ABBREV)
607 abbrev = MINIMUM_ABBREV;
608 else if (40 <= abbrev)
609 abbrev = 40;
d5012508
JH
610 continue;
611 }
5bb2c65a
JH
612 if (!strcmp(arg, "--sq")) {
613 output_sq = 1;
614 continue;
615 }
042a4ed7
LT
616 if (!strcmp(arg, "--not")) {
617 show_type ^= REVERSED;
618 continue;
619 }
30b96fce 620 if (!strcmp(arg, "--symbolic")) {
a6d97d49
JH
621 symbolic = SHOW_SYMBOLIC_ASIS;
622 continue;
623 }
624 if (!strcmp(arg, "--symbolic-full-name")) {
625 symbolic = SHOW_SYMBOLIC_FULL;
30b96fce
JH
626 continue;
627 }
59556548 628 if (starts_with(arg, "--abbrev-ref") &&
a45d3469
BW
629 (!arg[12] || arg[12] == '=')) {
630 abbrev_ref = 1;
631 abbrev_ref_strict = warn_ambiguous_refs;
632 if (arg[12] == '=') {
633 if (!strcmp(arg + 13, "strict"))
634 abbrev_ref_strict = 1;
635 else if (!strcmp(arg + 13, "loose"))
636 abbrev_ref_strict = 0;
637 else
638 die("unknown mode for %s", arg);
639 }
640 continue;
641 }
960bba0d 642 if (!strcmp(arg, "--all")) {
cb5d709f 643 for_each_ref(show_reference, NULL);
960bba0d
LT
644 continue;
645 }
59556548 646 if (starts_with(arg, "--disambiguate=")) {
957d7406
JH
647 for_each_abbrev(arg + 15, show_abbrev, NULL);
648 continue;
649 }
ad3f9a71
LT
650 if (!strcmp(arg, "--bisect")) {
651 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
652 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
653 continue;
654 }
59556548 655 if (starts_with(arg, "--branches=")) {
b09fe971
IL
656 for_each_glob_ref_in(show_reference, arg + 11,
657 "refs/heads/", NULL);
9dc01bf0 658 clear_ref_exclusion(&ref_excludes);
b09fe971
IL
659 continue;
660 }
a62be77f 661 if (!strcmp(arg, "--branches")) {
cb5d709f 662 for_each_branch_ref(show_reference, NULL);
9dc01bf0 663 clear_ref_exclusion(&ref_excludes);
a62be77f
SE
664 continue;
665 }
59556548 666 if (starts_with(arg, "--tags=")) {
b09fe971
IL
667 for_each_glob_ref_in(show_reference, arg + 7,
668 "refs/tags/", NULL);
9dc01bf0 669 clear_ref_exclusion(&ref_excludes);
b09fe971
IL
670 continue;
671 }
a62be77f 672 if (!strcmp(arg, "--tags")) {
cb5d709f 673 for_each_tag_ref(show_reference, NULL);
9dc01bf0 674 clear_ref_exclusion(&ref_excludes);
a62be77f
SE
675 continue;
676 }
59556548 677 if (starts_with(arg, "--glob=")) {
d08bae7e 678 for_each_glob_ref(show_reference, arg + 7, NULL);
9dc01bf0 679 clear_ref_exclusion(&ref_excludes);
d08bae7e
IL
680 continue;
681 }
59556548 682 if (starts_with(arg, "--remotes=")) {
b09fe971
IL
683 for_each_glob_ref_in(show_reference, arg + 10,
684 "refs/remotes/", NULL);
9dc01bf0 685 clear_ref_exclusion(&ref_excludes);
b09fe971
IL
686 continue;
687 }
a62be77f 688 if (!strcmp(arg, "--remotes")) {
cb5d709f 689 for_each_remote_ref(show_reference, NULL);
9dc01bf0
JH
690 clear_ref_exclusion(&ref_excludes);
691 continue;
692 }
ad704485 693 if (starts_with(arg, "--exclude=")) {
9dc01bf0 694 add_ref_exclusion(&ref_excludes, arg + 10);
a62be77f
SE
695 continue;
696 }
68889b41
JK
697 if (!strcmp(arg, "--local-env-vars")) {
698 int i;
699 for (i = 0; local_repo_env[i]; i++)
700 printf("%s\n", local_repo_env[i]);
701 continue;
702 }
7cceca5c
SD
703 if (!strcmp(arg, "--show-toplevel")) {
704 const char *work_tree = get_git_work_tree();
705 if (work_tree)
706 puts(work_tree);
707 continue;
708 }
d288a700 709 if (!strcmp(arg, "--show-prefix")) {
4866ccf0
JH
710 if (prefix)
711 puts(prefix);
658219f1
RL
712 else
713 putchar('\n');
d288a700
LT
714 continue;
715 }
5f94c730
JH
716 if (!strcmp(arg, "--show-cdup")) {
717 const char *pfx = prefix;
e90fdc39
JS
718 if (!is_inside_work_tree()) {
719 const char *work_tree =
720 get_git_work_tree();
721 if (work_tree)
722 printf("%s\n", work_tree);
723 continue;
724 }
5f94c730
JH
725 while (pfx) {
726 pfx = strchr(pfx, '/');
727 if (pfx) {
728 pfx++;
729 printf("../");
730 }
731 }
732 putchar('\n');
733 continue;
734 }
a8783eeb
LT
735 if (!strcmp(arg, "--git-dir")) {
736 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
737 static char cwd[PATH_MAX];
d06f15d9 738 int len;
a8783eeb
LT
739 if (gitdir) {
740 puts(gitdir);
741 continue;
742 }
743 if (!prefix) {
744 puts(".git");
745 continue;
746 }
747 if (!getcwd(cwd, PATH_MAX))
0721c314 748 die_errno("unable to get current working directory");
d06f15d9
NTND
749 len = strlen(cwd);
750 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
a8783eeb
LT
751 continue;
752 }
68889b41 753 if (!strcmp(arg, "--resolve-git-dir")) {
a43219f2 754 const char *gitdir = argv[++i];
68889b41 755 if (!gitdir)
a43219f2
DS
756 die("--resolve-git-dir requires an argument");
757 gitdir = resolve_gitdir(gitdir);
758 if (!gitdir)
759 die("not a gitdir '%s'", argv[i]);
68889b41
JK
760 puts(gitdir);
761 continue;
762 }
6d9ba67b
JS
763 if (!strcmp(arg, "--is-inside-git-dir")) {
764 printf("%s\n", is_inside_git_dir() ? "true"
765 : "false");
766 continue;
767 }
892c41b9
ML
768 if (!strcmp(arg, "--is-inside-work-tree")) {
769 printf("%s\n", is_inside_work_tree() ? "true"
770 : "false");
771 continue;
772 }
493c774e
ML
773 if (!strcmp(arg, "--is-bare-repository")) {
774 printf("%s\n", is_bare_repository() ? "true"
775 : "false");
776 continue;
777 }
59556548 778 if (starts_with(arg, "--since=")) {
c1babb1d
LT
779 show_datestring("--max-age=", arg+8);
780 continue;
781 }
59556548 782 if (starts_with(arg, "--after=")) {
c1babb1d
LT
783 show_datestring("--max-age=", arg+8);
784 continue;
785 }
59556548 786 if (starts_with(arg, "--before=")) {
c1babb1d
LT
787 show_datestring("--min-age=", arg+9);
788 continue;
789 }
59556548 790 if (starts_with(arg, "--until=")) {
c1babb1d
LT
791 show_datestring("--min-age=", arg+8);
792 continue;
793 }
9523a4c2 794 if (show_flag(arg) && verify)
b1b35969 795 die_no_single_rev(quiet);
178cb243
LT
796 continue;
797 }
4866ccf0
JH
798
799 /* Not a flag argument */
3dd4e732
SB
800 if (try_difference(arg))
801 continue;
2122f8b9
BS
802 if (try_parent_shorthands(arg))
803 continue;
dfd1b749
CC
804 name = arg;
805 type = NORMAL;
806 if (*arg == '^') {
807 name++;
808 type = REVERSED;
800644c5 809 }
dfd1b749
CC
810 if (!get_sha1(name, sha1)) {
811 if (verify)
812 revs_count++;
813 else
814 show_rev(type, sha1, name);
800644c5
LT
815 continue;
816 }
75ecfce3
CC
817 if (verify)
818 die_no_single_rev(quiet);
14185673
JK
819 if (has_dashdash)
820 die("bad revision '%s'", arg);
9ad0a933 821 as_is = 1;
12b9d327 822 if (!show_file(arg, output_prefix))
9ad0a933 823 continue;
023e37c3 824 verify_filename(prefix, arg, 1);
023d66ed 825 }
dfd1b749
CC
826 if (verify) {
827 if (revs_count == 1) {
828 show_rev(type, sha1, name);
829 return 0;
830 } else if (revs_count == 0 && show_default())
831 return 0;
b1b35969 832 die_no_single_rev(quiet);
dfd1b749
CC
833 } else
834 show_default();
178cb243
LT
835 return 0;
836}