builtin-apply: stronger indent-with-on-tab fixing
[git/jbf-maint.git] / builtin-rev-parse.c
blob20d1789e0161ed3d2d18cec94b1915f518a5d662
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;
24 static int symbolic;
25 static int abbrev;
26 static int output_sq;
28 static int revs_count;
31 * Some arguments are relevant "revision" arguments,
32 * others are about output format or other details.
33 * This sorts it all out.
35 static int is_rev_argument(const char *arg)
37 static const char *rev_args[] = {
38 "--all",
39 "--bisect",
40 "--dense",
41 "--branches",
42 "--header",
43 "--max-age=",
44 "--max-count=",
45 "--min-age=",
46 "--no-merges",
47 "--objects",
48 "--objects-edge",
49 "--parents",
50 "--pretty",
51 "--remotes",
52 "--sparse",
53 "--tags",
54 "--topo-order",
55 "--date-order",
56 "--unpacked",
57 NULL
59 const char **p = rev_args;
61 /* accept -<digit>, like traditional "head" */
62 if ((*arg == '-') && isdigit(arg[1]))
63 return 1;
65 for (;;) {
66 const char *str = *p++;
67 int len;
68 if (!str)
69 return 0;
70 len = strlen(str);
71 if (!strcmp(arg, str) ||
72 (str[len-1] == '=' && !strncmp(arg, str, len)))
73 return 1;
77 /* Output argument as a string, either SQ or normal */
78 static void show(const char *arg)
80 if (output_sq) {
81 int sq = '\'', ch;
83 putchar(sq);
84 while ((ch = *arg++)) {
85 if (ch == sq)
86 fputs("'\\'", stdout);
87 putchar(ch);
89 putchar(sq);
90 putchar(' ');
92 else
93 puts(arg);
96 /* Output a revision, only if filter allows it */
97 static void show_rev(int type, const unsigned char *sha1, const char *name)
99 if (!(filter & DO_REVS))
100 return;
101 def = NULL;
102 revs_count++;
104 if (type != show_type)
105 putchar('^');
106 if (symbolic && name)
107 show(name);
108 else if (abbrev)
109 show(find_unique_abbrev(sha1, abbrev));
110 else
111 show(sha1_to_hex(sha1));
114 /* Output a flag, only if filter allows it. */
115 static int show_flag(const char *arg)
117 if (!(filter & DO_FLAGS))
118 return 0;
119 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
120 show(arg);
121 return 1;
123 return 0;
126 static void show_default(void)
128 const char *s = def;
130 if (s) {
131 unsigned char sha1[20];
133 def = NULL;
134 if (!get_sha1(s, sha1)) {
135 show_rev(NORMAL, sha1, s);
136 return;
141 static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
143 show_rev(NORMAL, sha1, refname);
144 return 0;
147 static void show_datestring(const char *flag, const char *datestr)
149 static char buffer[100];
151 /* date handling requires both flags and revs */
152 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
153 return;
154 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
155 show(buffer);
158 static int show_file(const char *arg)
160 show_default();
161 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
162 show(arg);
163 return 1;
165 return 0;
168 static int try_difference(const char *arg)
170 char *dotdot;
171 unsigned char sha1[20];
172 unsigned char end[20];
173 const char *next;
174 const char *this;
175 int symmetric;
177 if (!(dotdot = strstr(arg, "..")))
178 return 0;
179 next = dotdot + 2;
180 this = arg;
181 symmetric = (*next == '.');
183 *dotdot = 0;
184 next += symmetric;
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;
207 return 1;
209 *dotdot = '.';
210 return 0;
213 static int parseopt_dump(const struct option *o, const char *arg, int unset)
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);
226 return 0;
229 static const char *skipspaces(const char *s)
231 while (isspace(*s))
232 s++;
233 return s;
236 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
238 static int keep_dashdash = 0;
239 static char const * const parseopt_usage[] = {
240 "git-rev-parse --parseopt [options] -- [<args>...]",
241 NULL
243 static struct option parseopt_opts[] = {
244 OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
245 "keep the `--` passed as an arg"),
246 OPT_END(),
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;
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);
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;
273 usage[unb++] = strbuf_detach(&sb, NULL);
276 /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
277 while (strbuf_getline(&sb, stdin, '\n') != EOF) {
278 const char *s;
279 struct option *o;
281 if (!sb.len)
282 continue;
284 ALLOC_GROW(opts, onb + 1, osz);
285 memset(opts + onb, 0, sizeof(opts[onb]));
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;
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;
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);
321 strbuf_release(&sb);
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);
329 strbuf_addf(&parsed, " --");
330 sq_quote_argv(&parsed, argv, 0);
331 puts(parsed.buf);
332 return 0;
335 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
337 int i, as_is = 0, verify = 0;
338 unsigned char sha1[20];
340 if (argc > 1 && !strcmp("--parseopt", argv[1]))
341 return cmd_parseopt(argc - 1, argv + 1, prefix);
343 prefix = setup_git_directory();
344 git_config(git_default_config);
345 for (i = 1; i < argc; i++) {
346 const char *arg = argv[i];
348 if (as_is) {
349 if (show_file(arg) && as_is < 2)
350 verify_filename(prefix, arg);
351 continue;
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]);
360 continue;
362 if (!prefixcmp(arg, "-n")) {
363 if ((filter & DO_FLAGS) && (filter & DO_REVS))
364 show(arg);
365 continue;
368 if (*arg == '-') {
369 if (!strcmp(arg, "--")) {
370 as_is = 2;
371 /* Pass on the "--" if we show anything but files.. */
372 if (filter & (DO_FLAGS | DO_REVS))
373 show_file(arg);
374 continue;
376 if (!strcmp(arg, "--default")) {
377 def = argv[i+1];
378 i++;
379 continue;
381 if (!strcmp(arg, "--revs-only")) {
382 filter &= ~DO_NOREV;
383 continue;
385 if (!strcmp(arg, "--no-revs")) {
386 filter &= ~DO_REVS;
387 continue;
389 if (!strcmp(arg, "--flags")) {
390 filter &= ~DO_NONFLAGS;
391 continue;
393 if (!strcmp(arg, "--no-flags")) {
394 filter &= ~DO_FLAGS;
395 continue;
397 if (!strcmp(arg, "--verify")) {
398 filter &= ~(DO_FLAGS|DO_NOREV);
399 verify = 1;
400 continue;
402 if (!strcmp(arg, "--short") ||
403 !prefixcmp(arg, "--short=")) {
404 filter &= ~(DO_FLAGS|DO_NOREV);
405 verify = 1;
406 abbrev = DEFAULT_ABBREV;
407 if (arg[7] == '=')
408 abbrev = strtoul(arg + 8, NULL, 10);
409 if (abbrev < MINIMUM_ABBREV)
410 abbrev = MINIMUM_ABBREV;
411 else if (40 <= abbrev)
412 abbrev = 40;
413 continue;
415 if (!strcmp(arg, "--sq")) {
416 output_sq = 1;
417 continue;
419 if (!strcmp(arg, "--not")) {
420 show_type ^= REVERSED;
421 continue;
423 if (!strcmp(arg, "--symbolic")) {
424 symbolic = 1;
425 continue;
427 if (!strcmp(arg, "--all")) {
428 for_each_ref(show_reference, NULL);
429 continue;
431 if (!strcmp(arg, "--branches")) {
432 for_each_branch_ref(show_reference, NULL);
433 continue;
435 if (!strcmp(arg, "--tags")) {
436 for_each_tag_ref(show_reference, NULL);
437 continue;
439 if (!strcmp(arg, "--remotes")) {
440 for_each_remote_ref(show_reference, NULL);
441 continue;
443 if (!strcmp(arg, "--show-prefix")) {
444 if (prefix)
445 puts(prefix);
446 continue;
448 if (!strcmp(arg, "--show-cdup")) {
449 const char *pfx = prefix;
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;
457 while (pfx) {
458 pfx = strchr(pfx, '/');
459 if (pfx) {
460 pfx++;
461 printf("../");
464 putchar('\n');
465 continue;
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;
474 if (!prefix) {
475 puts(".git");
476 continue;
478 if (!getcwd(cwd, PATH_MAX))
479 die("unable to get current working directory");
480 printf("%s/.git\n", cwd);
481 continue;
483 if (!strcmp(arg, "--is-inside-git-dir")) {
484 printf("%s\n", is_inside_git_dir() ? "true"
485 : "false");
486 continue;
488 if (!strcmp(arg, "--is-inside-work-tree")) {
489 printf("%s\n", is_inside_work_tree() ? "true"
490 : "false");
491 continue;
493 if (!strcmp(arg, "--is-bare-repository")) {
494 printf("%s\n", is_bare_repository() ? "true"
495 : "false");
496 continue;
498 if (!prefixcmp(arg, "--since=")) {
499 show_datestring("--max-age=", arg+8);
500 continue;
502 if (!prefixcmp(arg, "--after=")) {
503 show_datestring("--max-age=", arg+8);
504 continue;
506 if (!prefixcmp(arg, "--before=")) {
507 show_datestring("--min-age=", arg+9);
508 continue;
510 if (!prefixcmp(arg, "--until=")) {
511 show_datestring("--min-age=", arg+8);
512 continue;
514 if (show_flag(arg) && verify)
515 die("Needed a single revision");
516 continue;
519 /* Not a flag argument */
520 if (try_difference(arg))
521 continue;
522 if (!get_sha1(arg, sha1)) {
523 show_rev(NORMAL, sha1, arg);
524 continue;
526 if (*arg == '^' && !get_sha1(arg+1, sha1)) {
527 show_rev(REVERSED, sha1, arg+1);
528 continue;
530 as_is = 1;
531 if (!show_file(arg))
532 continue;
533 if (verify)
534 die("Needed a single revision");
535 verify_filename(prefix, arg);
537 show_default();
538 if (verify && revs_count != 1)
539 die("Needed a single revision");
540 return 0;