Merge branch 'bc/solaris'
[git/dscho.git] / builtin-rev-parse.c
blob112d622cda6f74f9752627d9adf3a1cdb04851c3
1 /*
2 * rev-parse.c
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #include "cache.h"
7 #include "commit.h"
8 #include "refs.h"
9 #include "quote.h"
10 #include "builtin.h"
11 #include "parse-options.h"
13 #define DO_REVS 1
14 #define DO_NOREV 2
15 #define DO_FLAGS 4
16 #define DO_NONFLAGS 8
17 static int filter = ~0;
19 static const char *def;
21 #define NORMAL 0
22 #define REVERSED 1
23 static int show_type = NORMAL;
25 #define SHOW_SYMBOLIC_ASIS 1
26 #define SHOW_SYMBOLIC_FULL 2
27 static int symbolic;
28 static int abbrev;
29 static int abbrev_ref;
30 static int abbrev_ref_strict;
31 static int output_sq;
34 * Some arguments are relevant "revision" arguments,
35 * others are about output format or other details.
36 * This sorts it all out.
38 static int is_rev_argument(const char *arg)
40 static const char *rev_args[] = {
41 "--all",
42 "--bisect",
43 "--dense",
44 "--branches",
45 "--header",
46 "--max-age=",
47 "--max-count=",
48 "--min-age=",
49 "--no-merges",
50 "--objects",
51 "--objects-edge",
52 "--parents",
53 "--pretty",
54 "--remotes",
55 "--sparse",
56 "--tags",
57 "--topo-order",
58 "--date-order",
59 "--unpacked",
60 NULL
62 const char **p = rev_args;
64 /* accept -<digit>, like traditional "head" */
65 if ((*arg == '-') && isdigit(arg[1]))
66 return 1;
68 for (;;) {
69 const char *str = *p++;
70 int len;
71 if (!str)
72 return 0;
73 len = strlen(str);
74 if (!strcmp(arg, str) ||
75 (str[len-1] == '=' && !strncmp(arg, str, len)))
76 return 1;
80 /* Output argument as a string, either SQ or normal */
81 static void show(const char *arg)
83 if (output_sq) {
84 int sq = '\'', ch;
86 putchar(sq);
87 while ((ch = *arg++)) {
88 if (ch == sq)
89 fputs("'\\'", stdout);
90 putchar(ch);
92 putchar(sq);
93 putchar(' ');
95 else
96 puts(arg);
99 /* Like show(), but with a negation prefix according to type */
100 static void show_with_type(int type, const char *arg)
102 if (type != show_type)
103 putchar('^');
104 show(arg);
107 /* Output a revision, only if filter allows it */
108 static void show_rev(int type, const unsigned char *sha1, const char *name)
110 if (!(filter & DO_REVS))
111 return;
112 def = NULL;
114 if ((symbolic || abbrev_ref) && name) {
115 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
116 unsigned char discard[20];
117 char *full;
119 switch (dwim_ref(name, strlen(name), discard, &full)) {
120 case 0:
122 * Not found -- not a ref. We could
123 * emit "name" here, but symbolic-full
124 * users are interested in finding the
125 * refs spelled in full, and they would
126 * need to filter non-refs if we did so.
128 break;
129 case 1: /* happy */
130 if (abbrev_ref)
131 full = shorten_unambiguous_ref(full,
132 abbrev_ref_strict);
133 show_with_type(type, full);
134 break;
135 default: /* ambiguous */
136 error("refname '%s' is ambiguous", name);
137 break;
139 } else {
140 show_with_type(type, name);
143 else if (abbrev)
144 show_with_type(type, find_unique_abbrev(sha1, abbrev));
145 else
146 show_with_type(type, sha1_to_hex(sha1));
149 /* Output a flag, only if filter allows it. */
150 static int show_flag(const char *arg)
152 if (!(filter & DO_FLAGS))
153 return 0;
154 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
155 show(arg);
156 return 1;
158 return 0;
161 static int show_default(void)
163 const char *s = def;
165 if (s) {
166 unsigned char sha1[20];
168 def = NULL;
169 if (!get_sha1(s, sha1)) {
170 show_rev(NORMAL, sha1, s);
171 return 1;
174 return 0;
177 static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
179 show_rev(NORMAL, sha1, refname);
180 return 0;
183 static void show_datestring(const char *flag, const char *datestr)
185 static char buffer[100];
187 /* date handling requires both flags and revs */
188 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
189 return;
190 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
191 show(buffer);
194 static int show_file(const char *arg)
196 show_default();
197 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
198 show(arg);
199 return 1;
201 return 0;
204 static int try_difference(const char *arg)
206 char *dotdot;
207 unsigned char sha1[20];
208 unsigned char end[20];
209 const char *next;
210 const char *this;
211 int symmetric;
213 if (!(dotdot = strstr(arg, "..")))
214 return 0;
215 next = dotdot + 2;
216 this = arg;
217 symmetric = (*next == '.');
219 *dotdot = 0;
220 next += symmetric;
222 if (!*next)
223 next = "HEAD";
224 if (dotdot == arg)
225 this = "HEAD";
226 if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
227 show_rev(NORMAL, end, next);
228 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
229 if (symmetric) {
230 struct commit_list *exclude;
231 struct commit *a, *b;
232 a = lookup_commit_reference(sha1);
233 b = lookup_commit_reference(end);
234 exclude = get_merge_bases(a, b, 1);
235 while (exclude) {
236 struct commit_list *n = exclude->next;
237 show_rev(REVERSED,
238 exclude->item->object.sha1,NULL);
239 free(exclude);
240 exclude = n;
243 return 1;
245 *dotdot = '.';
246 return 0;
249 static int try_parent_shorthands(const char *arg)
251 char *dotdot;
252 unsigned char sha1[20];
253 struct commit *commit;
254 struct commit_list *parents;
255 int parents_only;
257 if ((dotdot = strstr(arg, "^!")))
258 parents_only = 0;
259 else if ((dotdot = strstr(arg, "^@")))
260 parents_only = 1;
262 if (!dotdot || dotdot[2])
263 return 0;
265 *dotdot = 0;
266 if (get_sha1(arg, sha1))
267 return 0;
269 if (!parents_only)
270 show_rev(NORMAL, sha1, arg);
271 commit = lookup_commit_reference(sha1);
272 for (parents = commit->parents; parents; parents = parents->next)
273 show_rev(parents_only ? NORMAL : REVERSED,
274 parents->item->object.sha1, arg);
276 return 1;
279 static int parseopt_dump(const struct option *o, const char *arg, int unset)
281 struct strbuf *parsed = o->value;
282 if (unset)
283 strbuf_addf(parsed, " --no-%s", o->long_name);
284 else if (o->short_name)
285 strbuf_addf(parsed, " -%c", o->short_name);
286 else
287 strbuf_addf(parsed, " --%s", o->long_name);
288 if (arg) {
289 strbuf_addch(parsed, ' ');
290 sq_quote_buf(parsed, arg);
292 return 0;
295 static const char *skipspaces(const char *s)
297 while (isspace(*s))
298 s++;
299 return s;
302 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
304 static int keep_dashdash = 0;
305 static char const * const parseopt_usage[] = {
306 "git rev-parse --parseopt [options] -- [<args>...]",
307 NULL
309 static struct option parseopt_opts[] = {
310 OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
311 "keep the `--` passed as an arg"),
312 OPT_END(),
315 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
316 const char **usage = NULL;
317 struct option *opts = NULL;
318 int onb = 0, osz = 0, unb = 0, usz = 0;
320 strbuf_addstr(&parsed, "set --");
321 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
322 PARSE_OPT_KEEP_DASHDASH);
323 if (argc < 1 || strcmp(argv[0], "--"))
324 usage_with_options(parseopt_usage, parseopt_opts);
326 /* get the usage up to the first line with a -- on it */
327 for (;;) {
328 if (strbuf_getline(&sb, stdin, '\n') == EOF)
329 die("premature end of input");
330 ALLOC_GROW(usage, unb + 1, usz);
331 if (!strcmp("--", sb.buf)) {
332 if (unb < 1)
333 die("no usage string given before the `--' separator");
334 usage[unb] = NULL;
335 break;
337 usage[unb++] = strbuf_detach(&sb, NULL);
340 /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
341 while (strbuf_getline(&sb, stdin, '\n') != EOF) {
342 const char *s;
343 struct option *o;
345 if (!sb.len)
346 continue;
348 ALLOC_GROW(opts, onb + 1, osz);
349 memset(opts + onb, 0, sizeof(opts[onb]));
351 o = &opts[onb++];
352 s = strchr(sb.buf, ' ');
353 if (!s || *sb.buf == ' ') {
354 o->type = OPTION_GROUP;
355 o->help = xstrdup(skipspaces(sb.buf));
356 continue;
359 o->type = OPTION_CALLBACK;
360 o->help = xstrdup(skipspaces(s));
361 o->value = &parsed;
362 o->flags = PARSE_OPT_NOARG;
363 o->callback = &parseopt_dump;
364 while (s > sb.buf && strchr("*=?!", s[-1])) {
365 switch (*--s) {
366 case '=':
367 o->flags &= ~PARSE_OPT_NOARG;
368 break;
369 case '?':
370 o->flags &= ~PARSE_OPT_NOARG;
371 o->flags |= PARSE_OPT_OPTARG;
372 break;
373 case '!':
374 o->flags |= PARSE_OPT_NONEG;
375 break;
376 case '*':
377 o->flags |= PARSE_OPT_HIDDEN;
378 break;
382 if (s - sb.buf == 1) /* short option only */
383 o->short_name = *sb.buf;
384 else if (sb.buf[1] != ',') /* long option only */
385 o->long_name = xmemdupz(sb.buf, s - sb.buf);
386 else {
387 o->short_name = *sb.buf;
388 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
391 strbuf_release(&sb);
393 /* put an OPT_END() */
394 ALLOC_GROW(opts, onb + 1, osz);
395 memset(opts + onb, 0, sizeof(opts[onb]));
396 argc = parse_options(argc, argv, prefix, opts, usage,
397 keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0);
399 strbuf_addf(&parsed, " --");
400 sq_quote_argv(&parsed, argv, 0);
401 puts(parsed.buf);
402 return 0;
405 static int cmd_sq_quote(int argc, const char **argv)
407 struct strbuf buf = STRBUF_INIT;
409 if (argc)
410 sq_quote_argv(&buf, argv, 0);
411 printf("%s\n", buf.buf);
412 strbuf_release(&buf);
414 return 0;
417 static void die_no_single_rev(int quiet)
419 if (quiet)
420 exit(1);
421 else
422 die("Needed a single revision");
425 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
427 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
428 unsigned char sha1[20];
429 const char *name = NULL;
431 if (argc > 1 && !strcmp("--parseopt", argv[1]))
432 return cmd_parseopt(argc - 1, argv + 1, prefix);
434 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
435 return cmd_sq_quote(argc - 2, argv + 2);
437 prefix = setup_git_directory();
438 git_config(git_default_config, NULL);
439 for (i = 1; i < argc; i++) {
440 const char *arg = argv[i];
442 if (as_is) {
443 if (show_file(arg) && as_is < 2)
444 verify_filename(prefix, arg);
445 continue;
447 if (!strcmp(arg,"-n")) {
448 if (++i >= argc)
449 die("-n requires an argument");
450 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
451 show(arg);
452 show(argv[i]);
454 continue;
456 if (!prefixcmp(arg, "-n")) {
457 if ((filter & DO_FLAGS) && (filter & DO_REVS))
458 show(arg);
459 continue;
462 if (*arg == '-') {
463 if (!strcmp(arg, "--")) {
464 as_is = 2;
465 /* Pass on the "--" if we show anything but files.. */
466 if (filter & (DO_FLAGS | DO_REVS))
467 show_file(arg);
468 continue;
470 if (!strcmp(arg, "--default")) {
471 def = argv[i+1];
472 i++;
473 continue;
475 if (!strcmp(arg, "--revs-only")) {
476 filter &= ~DO_NOREV;
477 continue;
479 if (!strcmp(arg, "--no-revs")) {
480 filter &= ~DO_REVS;
481 continue;
483 if (!strcmp(arg, "--flags")) {
484 filter &= ~DO_NONFLAGS;
485 continue;
487 if (!strcmp(arg, "--no-flags")) {
488 filter &= ~DO_FLAGS;
489 continue;
491 if (!strcmp(arg, "--verify")) {
492 filter &= ~(DO_FLAGS|DO_NOREV);
493 verify = 1;
494 continue;
496 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
497 quiet = 1;
498 continue;
500 if (!strcmp(arg, "--short") ||
501 !prefixcmp(arg, "--short=")) {
502 filter &= ~(DO_FLAGS|DO_NOREV);
503 verify = 1;
504 abbrev = DEFAULT_ABBREV;
505 if (arg[7] == '=')
506 abbrev = strtoul(arg + 8, NULL, 10);
507 if (abbrev < MINIMUM_ABBREV)
508 abbrev = MINIMUM_ABBREV;
509 else if (40 <= abbrev)
510 abbrev = 40;
511 continue;
513 if (!strcmp(arg, "--sq")) {
514 output_sq = 1;
515 continue;
517 if (!strcmp(arg, "--not")) {
518 show_type ^= REVERSED;
519 continue;
521 if (!strcmp(arg, "--symbolic")) {
522 symbolic = SHOW_SYMBOLIC_ASIS;
523 continue;
525 if (!strcmp(arg, "--symbolic-full-name")) {
526 symbolic = SHOW_SYMBOLIC_FULL;
527 continue;
529 if (!prefixcmp(arg, "--abbrev-ref") &&
530 (!arg[12] || arg[12] == '=')) {
531 abbrev_ref = 1;
532 abbrev_ref_strict = warn_ambiguous_refs;
533 if (arg[12] == '=') {
534 if (!strcmp(arg + 13, "strict"))
535 abbrev_ref_strict = 1;
536 else if (!strcmp(arg + 13, "loose"))
537 abbrev_ref_strict = 0;
538 else
539 die("unknown mode for %s", arg);
541 continue;
543 if (!strcmp(arg, "--all")) {
544 for_each_ref(show_reference, NULL);
545 continue;
547 if (!strcmp(arg, "--branches")) {
548 for_each_branch_ref(show_reference, NULL);
549 continue;
551 if (!strcmp(arg, "--tags")) {
552 for_each_tag_ref(show_reference, NULL);
553 continue;
555 if (!strcmp(arg, "--remotes")) {
556 for_each_remote_ref(show_reference, NULL);
557 continue;
559 if (!strcmp(arg, "--show-prefix")) {
560 if (prefix)
561 puts(prefix);
562 continue;
564 if (!strcmp(arg, "--show-cdup")) {
565 const char *pfx = prefix;
566 if (!is_inside_work_tree()) {
567 const char *work_tree =
568 get_git_work_tree();
569 if (work_tree)
570 printf("%s\n", work_tree);
571 continue;
573 while (pfx) {
574 pfx = strchr(pfx, '/');
575 if (pfx) {
576 pfx++;
577 printf("../");
580 putchar('\n');
581 continue;
583 if (!strcmp(arg, "--git-dir")) {
584 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
585 static char cwd[PATH_MAX];
586 if (gitdir) {
587 puts(gitdir);
588 continue;
590 if (!prefix) {
591 puts(".git");
592 continue;
594 if (!getcwd(cwd, PATH_MAX))
595 die("unable to get current working directory");
596 printf("%s/.git\n", cwd);
597 continue;
599 if (!strcmp(arg, "--is-inside-git-dir")) {
600 printf("%s\n", is_inside_git_dir() ? "true"
601 : "false");
602 continue;
604 if (!strcmp(arg, "--is-inside-work-tree")) {
605 printf("%s\n", is_inside_work_tree() ? "true"
606 : "false");
607 continue;
609 if (!strcmp(arg, "--is-bare-repository")) {
610 printf("%s\n", is_bare_repository() ? "true"
611 : "false");
612 continue;
614 if (!prefixcmp(arg, "--since=")) {
615 show_datestring("--max-age=", arg+8);
616 continue;
618 if (!prefixcmp(arg, "--after=")) {
619 show_datestring("--max-age=", arg+8);
620 continue;
622 if (!prefixcmp(arg, "--before=")) {
623 show_datestring("--min-age=", arg+9);
624 continue;
626 if (!prefixcmp(arg, "--until=")) {
627 show_datestring("--min-age=", arg+8);
628 continue;
630 if (show_flag(arg) && verify)
631 die_no_single_rev(quiet);
632 continue;
635 /* Not a flag argument */
636 if (try_difference(arg))
637 continue;
638 if (try_parent_shorthands(arg))
639 continue;
640 name = arg;
641 type = NORMAL;
642 if (*arg == '^') {
643 name++;
644 type = REVERSED;
646 if (!get_sha1(name, sha1)) {
647 if (verify)
648 revs_count++;
649 else
650 show_rev(type, sha1, name);
651 continue;
653 if (verify)
654 die_no_single_rev(quiet);
655 as_is = 1;
656 if (!show_file(arg))
657 continue;
658 verify_filename(prefix, arg);
660 if (verify) {
661 if (revs_count == 1) {
662 show_rev(type, sha1, name);
663 return 0;
664 } else if (revs_count == 0 && show_default())
665 return 0;
666 die_no_single_rev(quiet);
667 } else
668 show_default();
669 return 0;