install-sh from automake does not like -m without delimiting space
[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"
a8be83fe 12
4866ccf0
JH
13#define DO_REVS 1
14#define DO_NOREV 2
15#define DO_FLAGS 4
16#define DO_NONFLAGS 8
17static int filter = ~0;
18
96f1e58f 19static const char *def;
023d66ed 20
042a4ed7
LT
21#define NORMAL 0
22#define REVERSED 1
23static int show_type = NORMAL;
96f1e58f
DR
24static int symbolic;
25static int abbrev;
26static int output_sq;
4866ccf0 27
96f1e58f 28static int revs_count;
042a4ed7 29
921d865e
LT
30/*
31 * Some arguments are relevant "revision" arguments,
32 * others are about output format or other details.
33 * This sorts it all out.
34 */
35static int is_rev_argument(const char *arg)
36{
37 static const char *rev_args[] = {
e091eb93 38 "--all",
4866ccf0 39 "--bisect",
5a83f3be 40 "--dense",
a62be77f 41 "--branches",
4866ccf0 42 "--header",
921d865e 43 "--max-age=",
4866ccf0 44 "--max-count=",
4866ccf0 45 "--min-age=",
5ccfb758 46 "--no-merges",
4866ccf0 47 "--objects",
c6496575 48 "--objects-edge",
4866ccf0
JH
49 "--parents",
50 "--pretty",
a62be77f 51 "--remotes",
5a83f3be 52 "--sparse",
a62be77f 53 "--tags",
4866ccf0 54 "--topo-order",
4c8725f1 55 "--date-order",
4866ccf0 56 "--unpacked",
921d865e
LT
57 NULL
58 };
59 const char **p = rev_args;
60
8233340c
EW
61 /* accept -<digit>, like traditional "head" */
62 if ((*arg == '-') && isdigit(arg[1]))
63 return 1;
64
921d865e
LT
65 for (;;) {
66 const char *str = *p++;
67 int len;
68 if (!str)
69 return 0;
70 len = strlen(str);
4866ccf0
JH
71 if (!strcmp(arg, str) ||
72 (str[len-1] == '=' && !strncmp(arg, str, len)))
921d865e
LT
73 return 1;
74 }
75}
76
4866ccf0 77/* Output argument as a string, either SQ or normal */
5bb2c65a
JH
78static void show(const char *arg)
79{
80 if (output_sq) {
81 int sq = '\'', ch;
82
83 putchar(sq);
84 while ((ch = *arg++)) {
85 if (ch == sq)
86 fputs("'\\'", stdout);
87 putchar(ch);
88 }
89 putchar(sq);
90 putchar(' ');
91 }
92 else
93 puts(arg);
94}
95
4866ccf0 96/* Output a revision, only if filter allows it */
30b96fce 97static void show_rev(int type, const unsigned char *sha1, const char *name)
023d66ed 98{
4866ccf0 99 if (!(filter & DO_REVS))
023d66ed 100 return;
4866ccf0
JH
101 def = NULL;
102 revs_count++;
5bb2c65a 103
30b96fce
JH
104 if (type != show_type)
105 putchar('^');
106 if (symbolic && name)
107 show(name);
d5012508
JH
108 else if (abbrev)
109 show(find_unique_abbrev(sha1, abbrev));
30b96fce
JH
110 else
111 show(sha1_to_hex(sha1));
023d66ed
LT
112}
113
4866ccf0 114/* Output a flag, only if filter allows it. */
16cee38a 115static int show_flag(const char *arg)
023d66ed 116{
4866ccf0 117 if (!(filter & DO_FLAGS))
9523a4c2
LT
118 return 0;
119 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
0360e99d 120 show(arg);
9523a4c2
LT
121 return 1;
122 }
123 return 0;
023d66ed
LT
124}
125
023d66ed
LT
126static void show_default(void)
127{
16cee38a 128 const char *s = def;
023d66ed
LT
129
130 if (s) {
131 unsigned char sha1[20];
132
133 def = NULL;
9938af6a 134 if (!get_sha1(s, sha1)) {
30b96fce 135 show_rev(NORMAL, sha1, s);
023d66ed
LT
136 return;
137 }
023d66ed
LT
138 }
139}
140
8da19775 141static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
960bba0d 142{
30b96fce 143 show_rev(NORMAL, sha1, refname);
960bba0d
LT
144 return 0;
145}
146
c1babb1d
LT
147static void show_datestring(const char *flag, const char *datestr)
148{
c1babb1d 149 static char buffer[100];
c1babb1d
LT
150
151 /* date handling requires both flags and revs */
152 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
153 return;
3c07b1d1 154 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
c1babb1d
LT
155 show(buffer);
156}
157
9ad0a933 158static int show_file(const char *arg)
7a3dd472 159{
7b34c2fa 160 show_default();
9ad0a933 161 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
7a3dd472 162 show(arg);
9ad0a933
LT
163 return 1;
164 }
165 return 0;
7a3dd472
LT
166}
167
b7d936b2 168static int try_difference(const char *arg)
3dd4e732
SB
169{
170 char *dotdot;
171 unsigned char sha1[20];
172 unsigned char end[20];
173 const char *next;
174 const char *this;
175 int symmetric;
176
177 if (!(dotdot = strstr(arg, "..")))
178 return 0;
179 next = dotdot + 2;
180 this = arg;
181 symmetric = (*next == '.');
182
183 *dotdot = 0;
184 next += symmetric;
185
186 if (!*next)
187 next = "HEAD";
188 if (dotdot == arg)
189 this = "HEAD";
190 if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
191 show_rev(NORMAL, end, next);
192 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
193 if (symmetric) {
194 struct commit_list *exclude;
195 struct commit *a, *b;
196 a = lookup_commit_reference(sha1);
197 b = lookup_commit_reference(end);
198 exclude = get_merge_bases(a, b, 1);
199 while (exclude) {
200 struct commit_list *n = exclude->next;
201 show_rev(REVERSED,
202 exclude->item->object.sha1,NULL);
203 free(exclude);
204 exclude = n;
205 }
206 }
207 return 1;
208 }
209 *dotdot = '.';
210 return 0;
211}
212
21d47835
PH
213static int parseopt_dump(const struct option *o, const char *arg, int unset)
214{
215 struct strbuf *parsed = o->value;
216 if (unset)
217 strbuf_addf(parsed, " --no-%s", o->long_name);
218 else if (o->short_name)
219 strbuf_addf(parsed, " -%c", o->short_name);
220 else
221 strbuf_addf(parsed, " --%s", o->long_name);
222 if (arg) {
223 strbuf_addch(parsed, ' ');
224 sq_quote_buf(parsed, arg);
225 }
226 return 0;
227}
228
229static const char *skipspaces(const char *s)
230{
231 while (isspace(*s))
232 s++;
233 return s;
234}
235
236static int cmd_parseopt(int argc, const char **argv, const char *prefix)
237{
238 static int keep_dashdash = 0;
239 static char const * const parseopt_usage[] = {
240 "git-rev-parse --parseopt [options] -- [<args>...]",
241 NULL
242 };
243 static struct option parseopt_opts[] = {
244 OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
245 "keep the `--` passed as an arg"),
246 OPT_END(),
247 };
248
249 struct strbuf sb, parsed;
250 const char **usage = NULL;
251 struct option *opts = NULL;
252 int onb = 0, osz = 0, unb = 0, usz = 0;
253
254 strbuf_init(&parsed, 0);
255 strbuf_addstr(&parsed, "set --");
256 argc = parse_options(argc, argv, parseopt_opts, parseopt_usage,
257 PARSE_OPT_KEEP_DASHDASH);
258 if (argc < 1 || strcmp(argv[0], "--"))
259 usage_with_options(parseopt_usage, parseopt_opts);
260
261 strbuf_init(&sb, 0);
262 /* get the usage up to the first line with a -- on it */
263 for (;;) {
264 if (strbuf_getline(&sb, stdin, '\n') == EOF)
265 die("premature end of input");
266 ALLOC_GROW(usage, unb + 1, usz);
267 if (!strcmp("--", sb.buf)) {
268 if (unb < 1)
269 die("no usage string given before the `--' separator");
270 usage[unb] = NULL;
271 break;
272 }
273 usage[unb++] = strbuf_detach(&sb, NULL);
274 }
275
276 /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
277 while (strbuf_getline(&sb, stdin, '\n') != EOF) {
278 const char *s;
279 struct option *o;
280
281 if (!sb.len)
282 continue;
283
284 ALLOC_GROW(opts, onb + 1, osz);
285 memset(opts + onb, 0, sizeof(opts[onb]));
286
287 o = &opts[onb++];
288 s = strchr(sb.buf, ' ');
289 if (!s || *sb.buf == ' ') {
290 o->type = OPTION_GROUP;
291 o->help = xstrdup(skipspaces(s));
292 continue;
293 }
294
295 o->type = OPTION_CALLBACK;
296 o->help = xstrdup(skipspaces(s));
297 o->value = &parsed;
298 o->callback = &parseopt_dump;
299 switch (s[-1]) {
300 case '=':
301 s--;
302 break;
303 case '?':
304 o->flags = PARSE_OPT_OPTARG;
305 s--;
306 break;
307 default:
308 o->flags = PARSE_OPT_NOARG;
309 break;
310 }
311
312 if (s - sb.buf == 1) /* short option only */
313 o->short_name = *sb.buf;
314 else if (sb.buf[1] != ',') /* long option only */
315 o->long_name = xmemdupz(sb.buf, s - sb.buf);
316 else {
317 o->short_name = *sb.buf;
318 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
319 }
320 }
321 strbuf_release(&sb);
322
323 /* put an OPT_END() */
324 ALLOC_GROW(opts, onb + 1, osz);
325 memset(opts + onb, 0, sizeof(opts[onb]));
326 argc = parse_options(argc, argv, opts, usage,
327 keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0);
328
329 strbuf_addf(&parsed, " --");
330 sq_quote_argv(&parsed, argv, argc, 0);
331 puts(parsed.buf);
332 return 0;
333}
334
a633fca0 335int cmd_rev_parse(int argc, const char **argv, const char *prefix)
178cb243 336{
4866ccf0 337 int i, as_is = 0, verify = 0;
178cb243 338 unsigned char sha1[20];
a62be77f 339
21d47835
PH
340 if (argc > 1 && !strcmp("--parseopt", argv[1]))
341 return cmd_parseopt(argc - 1, argv + 1, prefix);
342
5410a02a
JH
343 prefix = setup_git_directory();
344 git_config(git_default_config);
178cb243 345 for (i = 1; i < argc; i++) {
16cee38a 346 const char *arg = argv[i];
fb18a2ed 347
178cb243 348 if (as_is) {
fb18a2ed 349 if (show_file(arg) && as_is < 2)
e23d0b4a 350 verify_filename(prefix, arg);
178cb243
LT
351 continue;
352 }
3af06987
EW
353 if (!strcmp(arg,"-n")) {
354 if (++i >= argc)
355 die("-n requires an argument");
356 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
357 show(arg);
358 show(argv[i]);
359 }
360 continue;
361 }
1968d77d 362 if (!prefixcmp(arg, "-n")) {
3af06987
EW
363 if ((filter & DO_FLAGS) && (filter & DO_REVS))
364 show(arg);
365 continue;
366 }
367
178cb243
LT
368 if (*arg == '-') {
369 if (!strcmp(arg, "--")) {
fb18a2ed 370 as_is = 2;
a08b6505
LT
371 /* Pass on the "--" if we show anything but files.. */
372 if (filter & (DO_FLAGS | DO_REVS))
373 show_file(arg);
4866ccf0 374 continue;
178cb243
LT
375 }
376 if (!strcmp(arg, "--default")) {
178cb243
LT
377 def = argv[i+1];
378 i++;
379 continue;
380 }
8ebb0184 381 if (!strcmp(arg, "--revs-only")) {
4866ccf0 382 filter &= ~DO_NOREV;
8ebb0184
LT
383 continue;
384 }
385 if (!strcmp(arg, "--no-revs")) {
4866ccf0 386 filter &= ~DO_REVS;
8ebb0184
LT
387 continue;
388 }
f79b65aa 389 if (!strcmp(arg, "--flags")) {
4866ccf0 390 filter &= ~DO_NONFLAGS;
f79b65aa
LT
391 continue;
392 }
393 if (!strcmp(arg, "--no-flags")) {
4866ccf0 394 filter &= ~DO_FLAGS;
f79b65aa
LT
395 continue;
396 }
023d66ed 397 if (!strcmp(arg, "--verify")) {
4866ccf0
JH
398 filter &= ~(DO_FLAGS|DO_NOREV);
399 verify = 1;
023d66ed 400 continue;
921d865e 401 }
62a604ba 402 if (!strcmp(arg, "--short") ||
cc44c765 403 !prefixcmp(arg, "--short=")) {
d5012508
JH
404 filter &= ~(DO_FLAGS|DO_NOREV);
405 verify = 1;
406 abbrev = DEFAULT_ABBREV;
44de0da4
JF
407 if (arg[7] == '=')
408 abbrev = strtoul(arg + 8, NULL, 10);
1dc4fb84
JH
409 if (abbrev < MINIMUM_ABBREV)
410 abbrev = MINIMUM_ABBREV;
411 else if (40 <= abbrev)
412 abbrev = 40;
d5012508
JH
413 continue;
414 }
5bb2c65a
JH
415 if (!strcmp(arg, "--sq")) {
416 output_sq = 1;
417 continue;
418 }
042a4ed7
LT
419 if (!strcmp(arg, "--not")) {
420 show_type ^= REVERSED;
421 continue;
422 }
30b96fce
JH
423 if (!strcmp(arg, "--symbolic")) {
424 symbolic = 1;
425 continue;
426 }
960bba0d 427 if (!strcmp(arg, "--all")) {
cb5d709f 428 for_each_ref(show_reference, NULL);
960bba0d
LT
429 continue;
430 }
a62be77f 431 if (!strcmp(arg, "--branches")) {
cb5d709f 432 for_each_branch_ref(show_reference, NULL);
a62be77f
SE
433 continue;
434 }
435 if (!strcmp(arg, "--tags")) {
cb5d709f 436 for_each_tag_ref(show_reference, NULL);
a62be77f
SE
437 continue;
438 }
439 if (!strcmp(arg, "--remotes")) {
cb5d709f 440 for_each_remote_ref(show_reference, NULL);
a62be77f
SE
441 continue;
442 }
d288a700 443 if (!strcmp(arg, "--show-prefix")) {
4866ccf0
JH
444 if (prefix)
445 puts(prefix);
d288a700
LT
446 continue;
447 }
5f94c730
JH
448 if (!strcmp(arg, "--show-cdup")) {
449 const char *pfx = prefix;
e90fdc39
JS
450 if (!is_inside_work_tree()) {
451 const char *work_tree =
452 get_git_work_tree();
453 if (work_tree)
454 printf("%s\n", work_tree);
455 continue;
456 }
5f94c730
JH
457 while (pfx) {
458 pfx = strchr(pfx, '/');
459 if (pfx) {
460 pfx++;
461 printf("../");
462 }
463 }
464 putchar('\n');
465 continue;
466 }
a8783eeb
LT
467 if (!strcmp(arg, "--git-dir")) {
468 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
469 static char cwd[PATH_MAX];
470 if (gitdir) {
471 puts(gitdir);
472 continue;
473 }
474 if (!prefix) {
475 puts(".git");
476 continue;
477 }
478 if (!getcwd(cwd, PATH_MAX))
479 die("unable to get current working directory");
480 printf("%s/.git\n", cwd);
481 continue;
482 }
6d9ba67b
JS
483 if (!strcmp(arg, "--is-inside-git-dir")) {
484 printf("%s\n", is_inside_git_dir() ? "true"
485 : "false");
486 continue;
487 }
892c41b9
ML
488 if (!strcmp(arg, "--is-inside-work-tree")) {
489 printf("%s\n", is_inside_work_tree() ? "true"
490 : "false");
491 continue;
492 }
493c774e
ML
493 if (!strcmp(arg, "--is-bare-repository")) {
494 printf("%s\n", is_bare_repository() ? "true"
495 : "false");
496 continue;
497 }
cc44c765 498 if (!prefixcmp(arg, "--since=")) {
c1babb1d
LT
499 show_datestring("--max-age=", arg+8);
500 continue;
501 }
cc44c765 502 if (!prefixcmp(arg, "--after=")) {
c1babb1d
LT
503 show_datestring("--max-age=", arg+8);
504 continue;
505 }
cc44c765 506 if (!prefixcmp(arg, "--before=")) {
c1babb1d
LT
507 show_datestring("--min-age=", arg+9);
508 continue;
509 }
cc44c765 510 if (!prefixcmp(arg, "--until=")) {
c1babb1d
LT
511 show_datestring("--min-age=", arg+8);
512 continue;
513 }
9523a4c2 514 if (show_flag(arg) && verify)
4866ccf0 515 die("Needed a single revision");
178cb243
LT
516 continue;
517 }
4866ccf0
JH
518
519 /* Not a flag argument */
3dd4e732
SB
520 if (try_difference(arg))
521 continue;
9938af6a 522 if (!get_sha1(arg, sha1)) {
30b96fce 523 show_rev(NORMAL, sha1, arg);
800644c5
LT
524 continue;
525 }
9938af6a 526 if (*arg == '^' && !get_sha1(arg+1, sha1)) {
30b96fce 527 show_rev(REVERSED, sha1, arg+1);
800644c5
LT
528 continue;
529 }
9ad0a933
LT
530 as_is = 1;
531 if (!show_file(arg))
532 continue;
4866ccf0
JH
533 if (verify)
534 die("Needed a single revision");
e23d0b4a 535 verify_filename(prefix, arg);
023d66ed
LT
536 }
537 show_default();
4866ccf0
JH
538 if (verify && revs_count != 1)
539 die("Needed a single revision");
178cb243
LT
540 return 0;
541}