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Commit | Line | Data |
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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" |
a8be83fe | 12 | |
4866ccf0 JH |
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; | |
18 | ||
96f1e58f | 19 | static const char *def; |
023d66ed | 20 | |
042a4ed7 LT |
21 | #define NORMAL 0 |
22 | #define REVERSED 1 | |
23 | static int show_type = NORMAL; | |
a6d97d49 JH |
24 | |
25 | #define SHOW_SYMBOLIC_ASIS 1 | |
26 | #define SHOW_SYMBOLIC_FULL 2 | |
96f1e58f DR |
27 | static int symbolic; |
28 | static int abbrev; | |
29 | static int output_sq; | |
4866ccf0 | 30 | |
96f1e58f | 31 | static int revs_count; |
042a4ed7 | 32 | |
921d865e LT |
33 | /* |
34 | * Some arguments are relevant "revision" arguments, | |
35 | * others are about output format or other details. | |
36 | * This sorts it all out. | |
37 | */ | |
38 | static int is_rev_argument(const char *arg) | |
39 | { | |
40 | static const char *rev_args[] = { | |
e091eb93 | 41 | "--all", |
4866ccf0 | 42 | "--bisect", |
5a83f3be | 43 | "--dense", |
a62be77f | 44 | "--branches", |
4866ccf0 | 45 | "--header", |
921d865e | 46 | "--max-age=", |
4866ccf0 | 47 | "--max-count=", |
4866ccf0 | 48 | "--min-age=", |
5ccfb758 | 49 | "--no-merges", |
4866ccf0 | 50 | "--objects", |
c6496575 | 51 | "--objects-edge", |
4866ccf0 JH |
52 | "--parents", |
53 | "--pretty", | |
a62be77f | 54 | "--remotes", |
5a83f3be | 55 | "--sparse", |
a62be77f | 56 | "--tags", |
4866ccf0 | 57 | "--topo-order", |
4c8725f1 | 58 | "--date-order", |
4866ccf0 | 59 | "--unpacked", |
921d865e LT |
60 | NULL |
61 | }; | |
62 | const char **p = rev_args; | |
63 | ||
8233340c EW |
64 | /* accept -<digit>, like traditional "head" */ |
65 | if ((*arg == '-') && isdigit(arg[1])) | |
66 | return 1; | |
67 | ||
921d865e LT |
68 | for (;;) { |
69 | const char *str = *p++; | |
70 | int len; | |
71 | if (!str) | |
72 | return 0; | |
73 | len = strlen(str); | |
4866ccf0 JH |
74 | if (!strcmp(arg, str) || |
75 | (str[len-1] == '=' && !strncmp(arg, str, len))) | |
921d865e LT |
76 | return 1; |
77 | } | |
78 | } | |
79 | ||
4866ccf0 | 80 | /* Output argument as a string, either SQ or normal */ |
5bb2c65a JH |
81 | static void show(const char *arg) |
82 | { | |
83 | if (output_sq) { | |
84 | int sq = '\'', ch; | |
85 | ||
86 | putchar(sq); | |
87 | while ((ch = *arg++)) { | |
88 | if (ch == sq) | |
89 | fputs("'\\'", stdout); | |
90 | putchar(ch); | |
91 | } | |
92 | putchar(sq); | |
93 | putchar(' '); | |
94 | } | |
95 | else | |
96 | puts(arg); | |
97 | } | |
98 | ||
4866ccf0 | 99 | /* Output a revision, only if filter allows it */ |
30b96fce | 100 | static void show_rev(int type, const unsigned char *sha1, const char *name) |
023d66ed | 101 | { |
4866ccf0 | 102 | if (!(filter & DO_REVS)) |
023d66ed | 103 | return; |
4866ccf0 JH |
104 | def = NULL; |
105 | revs_count++; | |
5bb2c65a | 106 | |
30b96fce JH |
107 | if (type != show_type) |
108 | putchar('^'); | |
a6d97d49 JH |
109 | if (symbolic && name) { |
110 | if (symbolic == SHOW_SYMBOLIC_FULL) { | |
111 | unsigned char discard[20]; | |
112 | char *full; | |
113 | ||
114 | switch (dwim_ref(name, strlen(name), discard, &full)) { | |
115 | case 0: | |
116 | /* | |
117 | * Not found -- not a ref. We could | |
118 | * emit "name" here, but symbolic-full | |
119 | * users are interested in finding the | |
120 | * refs spelled in full, and they would | |
121 | * need to filter non-refs if we did so. | |
122 | */ | |
123 | break; | |
124 | case 1: /* happy */ | |
125 | show(full); | |
126 | break; | |
127 | default: /* ambiguous */ | |
128 | error("refname '%s' is ambiguous", name); | |
129 | break; | |
130 | } | |
131 | } else { | |
132 | show(name); | |
133 | } | |
134 | } | |
d5012508 JH |
135 | else if (abbrev) |
136 | show(find_unique_abbrev(sha1, abbrev)); | |
30b96fce JH |
137 | else |
138 | show(sha1_to_hex(sha1)); | |
023d66ed LT |
139 | } |
140 | ||
4866ccf0 | 141 | /* Output a flag, only if filter allows it. */ |
16cee38a | 142 | static int show_flag(const char *arg) |
023d66ed | 143 | { |
4866ccf0 | 144 | if (!(filter & DO_FLAGS)) |
9523a4c2 LT |
145 | return 0; |
146 | if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) { | |
0360e99d | 147 | show(arg); |
9523a4c2 LT |
148 | return 1; |
149 | } | |
150 | return 0; | |
023d66ed LT |
151 | } |
152 | ||
023d66ed LT |
153 | static void show_default(void) |
154 | { | |
16cee38a | 155 | const char *s = def; |
023d66ed LT |
156 | |
157 | if (s) { | |
158 | unsigned char sha1[20]; | |
159 | ||
160 | def = NULL; | |
9938af6a | 161 | if (!get_sha1(s, sha1)) { |
30b96fce | 162 | show_rev(NORMAL, sha1, s); |
023d66ed LT |
163 | return; |
164 | } | |
023d66ed LT |
165 | } |
166 | } | |
167 | ||
8da19775 | 168 | static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data) |
960bba0d | 169 | { |
30b96fce | 170 | show_rev(NORMAL, sha1, refname); |
960bba0d LT |
171 | return 0; |
172 | } | |
173 | ||
c1babb1d LT |
174 | static void show_datestring(const char *flag, const char *datestr) |
175 | { | |
c1babb1d | 176 | static char buffer[100]; |
c1babb1d LT |
177 | |
178 | /* date handling requires both flags and revs */ | |
179 | if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS)) | |
180 | return; | |
3c07b1d1 | 181 | snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr)); |
c1babb1d LT |
182 | show(buffer); |
183 | } | |
184 | ||
9ad0a933 | 185 | static int show_file(const char *arg) |
7a3dd472 | 186 | { |
7b34c2fa | 187 | show_default(); |
9ad0a933 | 188 | if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) { |
7a3dd472 | 189 | show(arg); |
9ad0a933 LT |
190 | return 1; |
191 | } | |
192 | return 0; | |
7a3dd472 LT |
193 | } |
194 | ||
b7d936b2 | 195 | static int try_difference(const char *arg) |
3dd4e732 SB |
196 | { |
197 | char *dotdot; | |
198 | unsigned char sha1[20]; | |
199 | unsigned char end[20]; | |
200 | const char *next; | |
201 | const char *this; | |
202 | int symmetric; | |
203 | ||
204 | if (!(dotdot = strstr(arg, ".."))) | |
205 | return 0; | |
206 | next = dotdot + 2; | |
207 | this = arg; | |
208 | symmetric = (*next == '.'); | |
209 | ||
210 | *dotdot = 0; | |
211 | next += symmetric; | |
212 | ||
213 | if (!*next) | |
214 | next = "HEAD"; | |
215 | if (dotdot == arg) | |
216 | this = "HEAD"; | |
217 | if (!get_sha1(this, sha1) && !get_sha1(next, end)) { | |
218 | show_rev(NORMAL, end, next); | |
219 | show_rev(symmetric ? NORMAL : REVERSED, sha1, this); | |
220 | if (symmetric) { | |
221 | struct commit_list *exclude; | |
222 | struct commit *a, *b; | |
223 | a = lookup_commit_reference(sha1); | |
224 | b = lookup_commit_reference(end); | |
225 | exclude = get_merge_bases(a, b, 1); | |
226 | while (exclude) { | |
227 | struct commit_list *n = exclude->next; | |
228 | show_rev(REVERSED, | |
229 | exclude->item->object.sha1,NULL); | |
230 | free(exclude); | |
231 | exclude = n; | |
232 | } | |
233 | } | |
234 | return 1; | |
235 | } | |
236 | *dotdot = '.'; | |
237 | return 0; | |
238 | } | |
239 | ||
21d47835 PH |
240 | static int parseopt_dump(const struct option *o, const char *arg, int unset) |
241 | { | |
242 | struct strbuf *parsed = o->value; | |
243 | if (unset) | |
244 | strbuf_addf(parsed, " --no-%s", o->long_name); | |
245 | else if (o->short_name) | |
246 | strbuf_addf(parsed, " -%c", o->short_name); | |
247 | else | |
248 | strbuf_addf(parsed, " --%s", o->long_name); | |
249 | if (arg) { | |
250 | strbuf_addch(parsed, ' '); | |
251 | sq_quote_buf(parsed, arg); | |
252 | } | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static const char *skipspaces(const char *s) | |
257 | { | |
258 | while (isspace(*s)) | |
259 | s++; | |
260 | return s; | |
261 | } | |
262 | ||
263 | static int cmd_parseopt(int argc, const char **argv, const char *prefix) | |
264 | { | |
265 | static int keep_dashdash = 0; | |
266 | static char const * const parseopt_usage[] = { | |
267 | "git-rev-parse --parseopt [options] -- [<args>...]", | |
268 | NULL | |
269 | }; | |
270 | static struct option parseopt_opts[] = { | |
271 | OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash, | |
272 | "keep the `--` passed as an arg"), | |
273 | OPT_END(), | |
274 | }; | |
275 | ||
276 | struct strbuf sb, parsed; | |
277 | const char **usage = NULL; | |
278 | struct option *opts = NULL; | |
279 | int onb = 0, osz = 0, unb = 0, usz = 0; | |
280 | ||
281 | strbuf_init(&parsed, 0); | |
282 | strbuf_addstr(&parsed, "set --"); | |
283 | argc = parse_options(argc, argv, parseopt_opts, parseopt_usage, | |
284 | PARSE_OPT_KEEP_DASHDASH); | |
285 | if (argc < 1 || strcmp(argv[0], "--")) | |
286 | usage_with_options(parseopt_usage, parseopt_opts); | |
287 | ||
288 | strbuf_init(&sb, 0); | |
289 | /* get the usage up to the first line with a -- on it */ | |
290 | for (;;) { | |
291 | if (strbuf_getline(&sb, stdin, '\n') == EOF) | |
292 | die("premature end of input"); | |
293 | ALLOC_GROW(usage, unb + 1, usz); | |
294 | if (!strcmp("--", sb.buf)) { | |
295 | if (unb < 1) | |
296 | die("no usage string given before the `--' separator"); | |
297 | usage[unb] = NULL; | |
298 | break; | |
299 | } | |
300 | usage[unb++] = strbuf_detach(&sb, NULL); | |
301 | } | |
302 | ||
303 | /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */ | |
304 | while (strbuf_getline(&sb, stdin, '\n') != EOF) { | |
305 | const char *s; | |
306 | struct option *o; | |
307 | ||
308 | if (!sb.len) | |
309 | continue; | |
310 | ||
311 | ALLOC_GROW(opts, onb + 1, osz); | |
312 | memset(opts + onb, 0, sizeof(opts[onb])); | |
313 | ||
314 | o = &opts[onb++]; | |
315 | s = strchr(sb.buf, ' '); | |
316 | if (!s || *sb.buf == ' ') { | |
317 | o->type = OPTION_GROUP; | |
318 | o->help = xstrdup(skipspaces(s)); | |
319 | continue; | |
320 | } | |
321 | ||
322 | o->type = OPTION_CALLBACK; | |
323 | o->help = xstrdup(skipspaces(s)); | |
324 | o->value = &parsed; | |
325 | o->callback = &parseopt_dump; | |
326 | switch (s[-1]) { | |
327 | case '=': | |
328 | s--; | |
329 | break; | |
330 | case '?': | |
331 | o->flags = PARSE_OPT_OPTARG; | |
332 | s--; | |
333 | break; | |
334 | default: | |
335 | o->flags = PARSE_OPT_NOARG; | |
336 | break; | |
337 | } | |
338 | ||
339 | if (s - sb.buf == 1) /* short option only */ | |
340 | o->short_name = *sb.buf; | |
341 | else if (sb.buf[1] != ',') /* long option only */ | |
342 | o->long_name = xmemdupz(sb.buf, s - sb.buf); | |
343 | else { | |
344 | o->short_name = *sb.buf; | |
345 | o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2); | |
346 | } | |
347 | } | |
348 | strbuf_release(&sb); | |
349 | ||
350 | /* put an OPT_END() */ | |
351 | ALLOC_GROW(opts, onb + 1, osz); | |
352 | memset(opts + onb, 0, sizeof(opts[onb])); | |
353 | argc = parse_options(argc, argv, opts, usage, | |
354 | keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0); | |
355 | ||
356 | strbuf_addf(&parsed, " --"); | |
b319ce4c | 357 | sq_quote_argv(&parsed, argv, 0); |
21d47835 PH |
358 | puts(parsed.buf); |
359 | return 0; | |
360 | } | |
361 | ||
a633fca0 | 362 | int cmd_rev_parse(int argc, const char **argv, const char *prefix) |
178cb243 | 363 | { |
4866ccf0 | 364 | int i, as_is = 0, verify = 0; |
178cb243 | 365 | unsigned char sha1[20]; |
a62be77f | 366 | |
21d47835 PH |
367 | if (argc > 1 && !strcmp("--parseopt", argv[1])) |
368 | return cmd_parseopt(argc - 1, argv + 1, prefix); | |
369 | ||
5410a02a JH |
370 | prefix = setup_git_directory(); |
371 | git_config(git_default_config); | |
178cb243 | 372 | for (i = 1; i < argc; i++) { |
16cee38a | 373 | const char *arg = argv[i]; |
fb18a2ed | 374 | |
178cb243 | 375 | if (as_is) { |
fb18a2ed | 376 | if (show_file(arg) && as_is < 2) |
e23d0b4a | 377 | verify_filename(prefix, arg); |
178cb243 LT |
378 | continue; |
379 | } | |
3af06987 EW |
380 | if (!strcmp(arg,"-n")) { |
381 | if (++i >= argc) | |
382 | die("-n requires an argument"); | |
383 | if ((filter & DO_FLAGS) && (filter & DO_REVS)) { | |
384 | show(arg); | |
385 | show(argv[i]); | |
386 | } | |
387 | continue; | |
388 | } | |
1968d77d | 389 | if (!prefixcmp(arg, "-n")) { |
3af06987 EW |
390 | if ((filter & DO_FLAGS) && (filter & DO_REVS)) |
391 | show(arg); | |
392 | continue; | |
393 | } | |
394 | ||
178cb243 LT |
395 | if (*arg == '-') { |
396 | if (!strcmp(arg, "--")) { | |
fb18a2ed | 397 | as_is = 2; |
a08b6505 LT |
398 | /* Pass on the "--" if we show anything but files.. */ |
399 | if (filter & (DO_FLAGS | DO_REVS)) | |
400 | show_file(arg); | |
4866ccf0 | 401 | continue; |
178cb243 LT |
402 | } |
403 | if (!strcmp(arg, "--default")) { | |
178cb243 LT |
404 | def = argv[i+1]; |
405 | i++; | |
406 | continue; | |
407 | } | |
8ebb0184 | 408 | if (!strcmp(arg, "--revs-only")) { |
4866ccf0 | 409 | filter &= ~DO_NOREV; |
8ebb0184 LT |
410 | continue; |
411 | } | |
412 | if (!strcmp(arg, "--no-revs")) { | |
4866ccf0 | 413 | filter &= ~DO_REVS; |
8ebb0184 LT |
414 | continue; |
415 | } | |
f79b65aa | 416 | if (!strcmp(arg, "--flags")) { |
4866ccf0 | 417 | filter &= ~DO_NONFLAGS; |
f79b65aa LT |
418 | continue; |
419 | } | |
420 | if (!strcmp(arg, "--no-flags")) { | |
4866ccf0 | 421 | filter &= ~DO_FLAGS; |
f79b65aa LT |
422 | continue; |
423 | } | |
023d66ed | 424 | if (!strcmp(arg, "--verify")) { |
4866ccf0 JH |
425 | filter &= ~(DO_FLAGS|DO_NOREV); |
426 | verify = 1; | |
023d66ed | 427 | continue; |
921d865e | 428 | } |
62a604ba | 429 | if (!strcmp(arg, "--short") || |
cc44c765 | 430 | !prefixcmp(arg, "--short=")) { |
d5012508 JH |
431 | filter &= ~(DO_FLAGS|DO_NOREV); |
432 | verify = 1; | |
433 | abbrev = DEFAULT_ABBREV; | |
44de0da4 JF |
434 | if (arg[7] == '=') |
435 | abbrev = strtoul(arg + 8, NULL, 10); | |
1dc4fb84 JH |
436 | if (abbrev < MINIMUM_ABBREV) |
437 | abbrev = MINIMUM_ABBREV; | |
438 | else if (40 <= abbrev) | |
439 | abbrev = 40; | |
d5012508 JH |
440 | continue; |
441 | } | |
5bb2c65a JH |
442 | if (!strcmp(arg, "--sq")) { |
443 | output_sq = 1; | |
444 | continue; | |
445 | } | |
042a4ed7 LT |
446 | if (!strcmp(arg, "--not")) { |
447 | show_type ^= REVERSED; | |
448 | continue; | |
449 | } | |
30b96fce | 450 | if (!strcmp(arg, "--symbolic")) { |
a6d97d49 JH |
451 | symbolic = SHOW_SYMBOLIC_ASIS; |
452 | continue; | |
453 | } | |
454 | if (!strcmp(arg, "--symbolic-full-name")) { | |
455 | symbolic = SHOW_SYMBOLIC_FULL; | |
30b96fce JH |
456 | continue; |
457 | } | |
960bba0d | 458 | if (!strcmp(arg, "--all")) { |
cb5d709f | 459 | for_each_ref(show_reference, NULL); |
960bba0d LT |
460 | continue; |
461 | } | |
a62be77f | 462 | if (!strcmp(arg, "--branches")) { |
cb5d709f | 463 | for_each_branch_ref(show_reference, NULL); |
a62be77f SE |
464 | continue; |
465 | } | |
466 | if (!strcmp(arg, "--tags")) { | |
cb5d709f | 467 | for_each_tag_ref(show_reference, NULL); |
a62be77f SE |
468 | continue; |
469 | } | |
470 | if (!strcmp(arg, "--remotes")) { | |
cb5d709f | 471 | for_each_remote_ref(show_reference, NULL); |
a62be77f SE |
472 | continue; |
473 | } | |
d288a700 | 474 | if (!strcmp(arg, "--show-prefix")) { |
4866ccf0 JH |
475 | if (prefix) |
476 | puts(prefix); | |
d288a700 LT |
477 | continue; |
478 | } | |
5f94c730 JH |
479 | if (!strcmp(arg, "--show-cdup")) { |
480 | const char *pfx = prefix; | |
e90fdc39 JS |
481 | if (!is_inside_work_tree()) { |
482 | const char *work_tree = | |
483 | get_git_work_tree(); | |
484 | if (work_tree) | |
485 | printf("%s\n", work_tree); | |
486 | continue; | |
487 | } | |
5f94c730 JH |
488 | while (pfx) { |
489 | pfx = strchr(pfx, '/'); | |
490 | if (pfx) { | |
491 | pfx++; | |
492 | printf("../"); | |
493 | } | |
494 | } | |
495 | putchar('\n'); | |
496 | continue; | |
497 | } | |
a8783eeb LT |
498 | if (!strcmp(arg, "--git-dir")) { |
499 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
500 | static char cwd[PATH_MAX]; | |
501 | if (gitdir) { | |
502 | puts(gitdir); | |
503 | continue; | |
504 | } | |
505 | if (!prefix) { | |
506 | puts(".git"); | |
507 | continue; | |
508 | } | |
509 | if (!getcwd(cwd, PATH_MAX)) | |
510 | die("unable to get current working directory"); | |
511 | printf("%s/.git\n", cwd); | |
512 | continue; | |
513 | } | |
6d9ba67b JS |
514 | if (!strcmp(arg, "--is-inside-git-dir")) { |
515 | printf("%s\n", is_inside_git_dir() ? "true" | |
516 | : "false"); | |
517 | continue; | |
518 | } | |
892c41b9 ML |
519 | if (!strcmp(arg, "--is-inside-work-tree")) { |
520 | printf("%s\n", is_inside_work_tree() ? "true" | |
521 | : "false"); | |
522 | continue; | |
523 | } | |
493c774e ML |
524 | if (!strcmp(arg, "--is-bare-repository")) { |
525 | printf("%s\n", is_bare_repository() ? "true" | |
526 | : "false"); | |
527 | continue; | |
528 | } | |
cc44c765 | 529 | if (!prefixcmp(arg, "--since=")) { |
c1babb1d LT |
530 | show_datestring("--max-age=", arg+8); |
531 | continue; | |
532 | } | |
cc44c765 | 533 | if (!prefixcmp(arg, "--after=")) { |
c1babb1d LT |
534 | show_datestring("--max-age=", arg+8); |
535 | continue; | |
536 | } | |
cc44c765 | 537 | if (!prefixcmp(arg, "--before=")) { |
c1babb1d LT |
538 | show_datestring("--min-age=", arg+9); |
539 | continue; | |
540 | } | |
cc44c765 | 541 | if (!prefixcmp(arg, "--until=")) { |
c1babb1d LT |
542 | show_datestring("--min-age=", arg+8); |
543 | continue; | |
544 | } | |
9523a4c2 | 545 | if (show_flag(arg) && verify) |
4866ccf0 | 546 | die("Needed a single revision"); |
178cb243 LT |
547 | continue; |
548 | } | |
4866ccf0 JH |
549 | |
550 | /* Not a flag argument */ | |
3dd4e732 SB |
551 | if (try_difference(arg)) |
552 | continue; | |
9938af6a | 553 | if (!get_sha1(arg, sha1)) { |
30b96fce | 554 | show_rev(NORMAL, sha1, arg); |
800644c5 LT |
555 | continue; |
556 | } | |
9938af6a | 557 | if (*arg == '^' && !get_sha1(arg+1, sha1)) { |
30b96fce | 558 | show_rev(REVERSED, sha1, arg+1); |
800644c5 LT |
559 | continue; |
560 | } | |
9ad0a933 LT |
561 | as_is = 1; |
562 | if (!show_file(arg)) | |
563 | continue; | |
4866ccf0 JH |
564 | if (verify) |
565 | die("Needed a single revision"); | |
e23d0b4a | 566 | verify_filename(prefix, arg); |
023d66ed LT |
567 | } |
568 | show_default(); | |
4866ccf0 JH |
569 | if (verify && revs_count != 1) |
570 | die("Needed a single revision"); | |
178cb243 LT |
571 | return 0; |
572 | } |