Merge branch 'maint'
[git/git.git] / builtin-for-each-ref.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "refs.h"
4 #include "object.h"
5 #include "tag.h"
6 #include "commit.h"
7 #include "tree.h"
8 #include "blob.h"
9 #include "quote.h"
10 #include "parse-options.h"
11
12 /* Quoting styles */
13 #define QUOTE_NONE 0
14 #define QUOTE_SHELL 1
15 #define QUOTE_PERL 2
16 #define QUOTE_PYTHON 4
17 #define QUOTE_TCL 8
18
19 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
20
21 struct atom_value {
22 const char *s;
23 unsigned long ul; /* used for sorting when not FIELD_STR */
24 };
25
26 struct ref_sort {
27 struct ref_sort *next;
28 int atom; /* index into used_atom array */
29 unsigned reverse : 1;
30 };
31
32 struct refinfo {
33 char *refname;
34 unsigned char objectname[20];
35 struct atom_value *value;
36 };
37
38 static struct {
39 const char *name;
40 cmp_type cmp_type;
41 } valid_atom[] = {
42 { "refname" },
43 { "objecttype" },
44 { "objectsize", FIELD_ULONG },
45 { "objectname" },
46 { "tree" },
47 { "parent" },
48 { "numparent", FIELD_ULONG },
49 { "object" },
50 { "type" },
51 { "tag" },
52 { "author" },
53 { "authorname" },
54 { "authoremail" },
55 { "authordate", FIELD_TIME },
56 { "committer" },
57 { "committername" },
58 { "committeremail" },
59 { "committerdate", FIELD_TIME },
60 { "tagger" },
61 { "taggername" },
62 { "taggeremail" },
63 { "taggerdate", FIELD_TIME },
64 { "creator" },
65 { "creatordate", FIELD_TIME },
66 { "subject" },
67 { "body" },
68 { "contents" },
69 };
70
71 /*
72 * An atom is a valid field atom listed above, possibly prefixed with
73 * a "*" to denote deref_tag().
74 *
75 * We parse given format string and sort specifiers, and make a list
76 * of properties that we need to extract out of objects. refinfo
77 * structure will hold an array of values extracted that can be
78 * indexed with the "atom number", which is an index into this
79 * array.
80 */
81 static const char **used_atom;
82 static cmp_type *used_atom_type;
83 static int used_atom_cnt, sort_atom_limit, need_tagged;
84
85 /*
86 * Used to parse format string and sort specifiers
87 */
88 static int parse_atom(const char *atom, const char *ep)
89 {
90 const char *sp;
91 int i, at;
92
93 sp = atom;
94 if (*sp == '*' && sp < ep)
95 sp++; /* deref */
96 if (ep <= sp)
97 die("malformed field name: %.*s", (int)(ep-atom), atom);
98
99 /* Do we have the atom already used elsewhere? */
100 for (i = 0; i < used_atom_cnt; i++) {
101 int len = strlen(used_atom[i]);
102 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
103 return i;
104 }
105
106 /* Is the atom a valid one? */
107 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
108 int len = strlen(valid_atom[i].name);
109 /*
110 * If the atom name has a colon, strip it and everything after
111 * it off - it specifies the format for this entry, and
112 * shouldn't be used for checking against the valid_atom
113 * table.
114 */
115 const char *formatp = strchr(sp, ':');
116 if (!formatp || ep < formatp)
117 formatp = ep;
118 if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
119 break;
120 }
121
122 if (ARRAY_SIZE(valid_atom) <= i)
123 die("unknown field name: %.*s", (int)(ep-atom), atom);
124
125 /* Add it in, including the deref prefix */
126 at = used_atom_cnt;
127 used_atom_cnt++;
128 used_atom = xrealloc(used_atom,
129 (sizeof *used_atom) * used_atom_cnt);
130 used_atom_type = xrealloc(used_atom_type,
131 (sizeof(*used_atom_type) * used_atom_cnt));
132 used_atom[at] = xmemdupz(atom, ep - atom);
133 used_atom_type[at] = valid_atom[i].cmp_type;
134 return at;
135 }
136
137 /*
138 * In a format string, find the next occurrence of %(atom).
139 */
140 static const char *find_next(const char *cp)
141 {
142 while (*cp) {
143 if (*cp == '%') {
144 /* %( is the start of an atom;
145 * %% is a quoted per-cent.
146 */
147 if (cp[1] == '(')
148 return cp;
149 else if (cp[1] == '%')
150 cp++; /* skip over two % */
151 /* otherwise this is a singleton, literal % */
152 }
153 cp++;
154 }
155 return NULL;
156 }
157
158 /*
159 * Make sure the format string is well formed, and parse out
160 * the used atoms.
161 */
162 static int verify_format(const char *format)
163 {
164 const char *cp, *sp;
165 for (cp = format; *cp && (sp = find_next(cp)); ) {
166 const char *ep = strchr(sp, ')');
167 if (!ep)
168 return error("malformed format string %s", sp);
169 /* sp points at "%(" and ep points at the closing ")" */
170 parse_atom(sp + 2, ep);
171 cp = ep + 1;
172 }
173 return 0;
174 }
175
176 /*
177 * Given an object name, read the object data and size, and return a
178 * "struct object". If the object data we are returning is also borrowed
179 * by the "struct object" representation, set *eaten as well---it is a
180 * signal from parse_object_buffer to us not to free the buffer.
181 */
182 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
183 {
184 enum object_type type;
185 void *buf = read_sha1_file(sha1, &type, sz);
186
187 if (buf)
188 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
189 else
190 *obj = NULL;
191 return buf;
192 }
193
194 /* See grab_values */
195 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
196 {
197 int i;
198
199 for (i = 0; i < used_atom_cnt; i++) {
200 const char *name = used_atom[i];
201 struct atom_value *v = &val[i];
202 if (!!deref != (*name == '*'))
203 continue;
204 if (deref)
205 name++;
206 if (!strcmp(name, "objecttype"))
207 v->s = typename(obj->type);
208 else if (!strcmp(name, "objectsize")) {
209 char *s = xmalloc(40);
210 sprintf(s, "%lu", sz);
211 v->ul = sz;
212 v->s = s;
213 }
214 else if (!strcmp(name, "objectname")) {
215 char *s = xmalloc(41);
216 strcpy(s, sha1_to_hex(obj->sha1));
217 v->s = s;
218 }
219 }
220 }
221
222 /* See grab_values */
223 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
224 {
225 int i;
226 struct tag *tag = (struct tag *) obj;
227
228 for (i = 0; i < used_atom_cnt; i++) {
229 const char *name = used_atom[i];
230 struct atom_value *v = &val[i];
231 if (!!deref != (*name == '*'))
232 continue;
233 if (deref)
234 name++;
235 if (!strcmp(name, "tag"))
236 v->s = tag->tag;
237 else if (!strcmp(name, "type") && tag->tagged)
238 v->s = typename(tag->tagged->type);
239 else if (!strcmp(name, "object") && tag->tagged) {
240 char *s = xmalloc(41);
241 strcpy(s, sha1_to_hex(tag->tagged->sha1));
242 v->s = s;
243 }
244 }
245 }
246
247 static int num_parents(struct commit *commit)
248 {
249 struct commit_list *parents;
250 int i;
251
252 for (i = 0, parents = commit->parents;
253 parents;
254 parents = parents->next)
255 i++;
256 return i;
257 }
258
259 /* See grab_values */
260 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
261 {
262 int i;
263 struct commit *commit = (struct commit *) obj;
264
265 for (i = 0; i < used_atom_cnt; i++) {
266 const char *name = used_atom[i];
267 struct atom_value *v = &val[i];
268 if (!!deref != (*name == '*'))
269 continue;
270 if (deref)
271 name++;
272 if (!strcmp(name, "tree")) {
273 char *s = xmalloc(41);
274 strcpy(s, sha1_to_hex(commit->tree->object.sha1));
275 v->s = s;
276 }
277 if (!strcmp(name, "numparent")) {
278 char *s = xmalloc(40);
279 v->ul = num_parents(commit);
280 sprintf(s, "%lu", v->ul);
281 v->s = s;
282 }
283 else if (!strcmp(name, "parent")) {
284 int num = num_parents(commit);
285 int i;
286 struct commit_list *parents;
287 char *s = xmalloc(41 * num + 1);
288 v->s = s;
289 for (i = 0, parents = commit->parents;
290 parents;
291 parents = parents->next, i = i + 41) {
292 struct commit *parent = parents->item;
293 strcpy(s+i, sha1_to_hex(parent->object.sha1));
294 if (parents->next)
295 s[i+40] = ' ';
296 }
297 if (!i)
298 *s = '\0';
299 }
300 }
301 }
302
303 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
304 {
305 const char *eol;
306 while (*buf) {
307 if (!strncmp(buf, who, wholen) &&
308 buf[wholen] == ' ')
309 return buf + wholen + 1;
310 eol = strchr(buf, '\n');
311 if (!eol)
312 return "";
313 eol++;
314 if (*eol == '\n')
315 return ""; /* end of header */
316 buf = eol;
317 }
318 return "";
319 }
320
321 static const char *copy_line(const char *buf)
322 {
323 const char *eol = strchr(buf, '\n');
324 if (!eol) // simulate strchrnul()
325 eol = buf + strlen(buf);
326 return xmemdupz(buf, eol - buf);
327 }
328
329 static const char *copy_name(const char *buf)
330 {
331 const char *cp;
332 for (cp = buf; *cp && *cp != '\n'; cp++) {
333 if (!strncmp(cp, " <", 2))
334 return xmemdupz(buf, cp - buf);
335 }
336 return "";
337 }
338
339 static const char *copy_email(const char *buf)
340 {
341 const char *email = strchr(buf, '<');
342 const char *eoemail = strchr(email, '>');
343 if (!email || !eoemail)
344 return "";
345 return xmemdupz(email, eoemail + 1 - email);
346 }
347
348 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
349 {
350 const char *eoemail = strstr(buf, "> ");
351 char *zone;
352 unsigned long timestamp;
353 long tz;
354 enum date_mode date_mode = DATE_NORMAL;
355 const char *formatp;
356
357 /*
358 * We got here because atomname ends in "date" or "date<something>";
359 * it's not possible that <something> is not ":<format>" because
360 * parse_atom() wouldn't have allowed it, so we can assume that no
361 * ":" means no format is specified, and use the default.
362 */
363 formatp = strchr(atomname, ':');
364 if (formatp != NULL) {
365 formatp++;
366 date_mode = parse_date_format(formatp);
367 }
368
369 if (!eoemail)
370 goto bad;
371 timestamp = strtoul(eoemail + 2, &zone, 10);
372 if (timestamp == ULONG_MAX)
373 goto bad;
374 tz = strtol(zone, NULL, 10);
375 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
376 goto bad;
377 v->s = xstrdup(show_date(timestamp, tz, date_mode));
378 v->ul = timestamp;
379 return;
380 bad:
381 v->s = "";
382 v->ul = 0;
383 }
384
385 /* See grab_values */
386 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
387 {
388 int i;
389 int wholen = strlen(who);
390 const char *wholine = NULL;
391
392 for (i = 0; i < used_atom_cnt; i++) {
393 const char *name = used_atom[i];
394 struct atom_value *v = &val[i];
395 if (!!deref != (*name == '*'))
396 continue;
397 if (deref)
398 name++;
399 if (strncmp(who, name, wholen))
400 continue;
401 if (name[wholen] != 0 &&
402 strcmp(name + wholen, "name") &&
403 strcmp(name + wholen, "email") &&
404 prefixcmp(name + wholen, "date"))
405 continue;
406 if (!wholine)
407 wholine = find_wholine(who, wholen, buf, sz);
408 if (!wholine)
409 return; /* no point looking for it */
410 if (name[wholen] == 0)
411 v->s = copy_line(wholine);
412 else if (!strcmp(name + wholen, "name"))
413 v->s = copy_name(wholine);
414 else if (!strcmp(name + wholen, "email"))
415 v->s = copy_email(wholine);
416 else if (!prefixcmp(name + wholen, "date"))
417 grab_date(wholine, v, name);
418 }
419
420 /* For a tag or a commit object, if "creator" or "creatordate" is
421 * requested, do something special.
422 */
423 if (strcmp(who, "tagger") && strcmp(who, "committer"))
424 return; /* "author" for commit object is not wanted */
425 if (!wholine)
426 wholine = find_wholine(who, wholen, buf, sz);
427 if (!wholine)
428 return;
429 for (i = 0; i < used_atom_cnt; i++) {
430 const char *name = used_atom[i];
431 struct atom_value *v = &val[i];
432 if (!!deref != (*name == '*'))
433 continue;
434 if (deref)
435 name++;
436
437 if (!prefixcmp(name, "creatordate"))
438 grab_date(wholine, v, name);
439 else if (!strcmp(name, "creator"))
440 v->s = copy_line(wholine);
441 }
442 }
443
444 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
445 {
446 while (*buf) {
447 const char *eol = strchr(buf, '\n');
448 if (!eol)
449 return;
450 if (eol[1] == '\n') {
451 buf = eol + 1;
452 break; /* found end of header */
453 }
454 buf = eol + 1;
455 }
456 while (*buf == '\n')
457 buf++;
458 if (!*buf)
459 return;
460 *sub = buf; /* first non-empty line */
461 buf = strchr(buf, '\n');
462 if (!buf) {
463 *body = "";
464 return; /* no body */
465 }
466 while (*buf == '\n')
467 buf++; /* skip blank between subject and body */
468 *body = buf;
469 }
470
471 /* See grab_values */
472 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
473 {
474 int i;
475 const char *subpos = NULL, *bodypos = NULL;
476
477 for (i = 0; i < used_atom_cnt; i++) {
478 const char *name = used_atom[i];
479 struct atom_value *v = &val[i];
480 if (!!deref != (*name == '*'))
481 continue;
482 if (deref)
483 name++;
484 if (strcmp(name, "subject") &&
485 strcmp(name, "body") &&
486 strcmp(name, "contents"))
487 continue;
488 if (!subpos)
489 find_subpos(buf, sz, &subpos, &bodypos);
490 if (!subpos)
491 return;
492
493 if (!strcmp(name, "subject"))
494 v->s = copy_line(subpos);
495 else if (!strcmp(name, "body"))
496 v->s = xstrdup(bodypos);
497 else if (!strcmp(name, "contents"))
498 v->s = xstrdup(subpos);
499 }
500 }
501
502 /* We want to have empty print-string for field requests
503 * that do not apply (e.g. "authordate" for a tag object)
504 */
505 static void fill_missing_values(struct atom_value *val)
506 {
507 int i;
508 for (i = 0; i < used_atom_cnt; i++) {
509 struct atom_value *v = &val[i];
510 if (v->s == NULL)
511 v->s = "";
512 }
513 }
514
515 /*
516 * val is a list of atom_value to hold returned values. Extract
517 * the values for atoms in used_atom array out of (obj, buf, sz).
518 * when deref is false, (obj, buf, sz) is the object that is
519 * pointed at by the ref itself; otherwise it is the object the
520 * ref (which is a tag) refers to.
521 */
522 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
523 {
524 grab_common_values(val, deref, obj, buf, sz);
525 switch (obj->type) {
526 case OBJ_TAG:
527 grab_tag_values(val, deref, obj, buf, sz);
528 grab_sub_body_contents(val, deref, obj, buf, sz);
529 grab_person("tagger", val, deref, obj, buf, sz);
530 break;
531 case OBJ_COMMIT:
532 grab_commit_values(val, deref, obj, buf, sz);
533 grab_sub_body_contents(val, deref, obj, buf, sz);
534 grab_person("author", val, deref, obj, buf, sz);
535 grab_person("committer", val, deref, obj, buf, sz);
536 break;
537 case OBJ_TREE:
538 // grab_tree_values(val, deref, obj, buf, sz);
539 break;
540 case OBJ_BLOB:
541 // grab_blob_values(val, deref, obj, buf, sz);
542 break;
543 default:
544 die("Eh? Object of type %d?", obj->type);
545 }
546 }
547
548 /*
549 * generate a format suitable for scanf from a ref_rev_parse_rules
550 * rule, that is replace the "%.*s" spec with a "%s" spec
551 */
552 static void gen_scanf_fmt(char *scanf_fmt, const char *rule)
553 {
554 char *spec;
555
556 spec = strstr(rule, "%.*s");
557 if (!spec || strstr(spec + 4, "%.*s"))
558 die("invalid rule in ref_rev_parse_rules: %s", rule);
559
560 /* copy all until spec */
561 strncpy(scanf_fmt, rule, spec - rule);
562 scanf_fmt[spec - rule] = '\0';
563 /* copy new spec */
564 strcat(scanf_fmt, "%s");
565 /* copy remaining rule */
566 strcat(scanf_fmt, spec + 4);
567
568 return;
569 }
570
571 /*
572 * Shorten the refname to an non-ambiguous form
573 */
574 static char *get_short_ref(struct refinfo *ref)
575 {
576 int i;
577 static char **scanf_fmts;
578 static int nr_rules;
579 char *short_name;
580
581 /* pre generate scanf formats from ref_rev_parse_rules[] */
582 if (!nr_rules) {
583 size_t total_len = 0;
584
585 /* the rule list is NULL terminated, count them first */
586 for (; ref_rev_parse_rules[nr_rules]; nr_rules++)
587 /* no +1 because strlen("%s") < strlen("%.*s") */
588 total_len += strlen(ref_rev_parse_rules[nr_rules]);
589
590 scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len);
591
592 total_len = 0;
593 for (i = 0; i < nr_rules; i++) {
594 scanf_fmts[i] = (char *)&scanf_fmts[nr_rules]
595 + total_len;
596 gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]);
597 total_len += strlen(ref_rev_parse_rules[i]);
598 }
599 }
600
601 /* bail out if there are no rules */
602 if (!nr_rules)
603 return ref->refname;
604
605 /* buffer for scanf result, at most ref->refname must fit */
606 short_name = xstrdup(ref->refname);
607
608 /* skip first rule, it will always match */
609 for (i = nr_rules - 1; i > 0 ; --i) {
610 int j;
611 int short_name_len;
612
613 if (1 != sscanf(ref->refname, scanf_fmts[i], short_name))
614 continue;
615
616 short_name_len = strlen(short_name);
617
618 /*
619 * check if the short name resolves to a valid ref,
620 * but use only rules prior to the matched one
621 */
622 for (j = 0; j < i; j++) {
623 const char *rule = ref_rev_parse_rules[j];
624 unsigned char short_objectname[20];
625
626 /*
627 * the short name is ambiguous, if it resolves
628 * (with this previous rule) to a valid ref
629 * read_ref() returns 0 on success
630 */
631 if (!read_ref(mkpath(rule, short_name_len, short_name),
632 short_objectname))
633 break;
634 }
635
636 /*
637 * short name is non-ambiguous if all previous rules
638 * haven't resolved to a valid ref
639 */
640 if (j == i)
641 return short_name;
642 }
643
644 free(short_name);
645 return ref->refname;
646 }
647
648
649 /*
650 * Parse the object referred by ref, and grab needed value.
651 */
652 static void populate_value(struct refinfo *ref)
653 {
654 void *buf;
655 struct object *obj;
656 int eaten, i;
657 unsigned long size;
658 const unsigned char *tagged;
659
660 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
661
662 buf = get_obj(ref->objectname, &obj, &size, &eaten);
663 if (!buf)
664 die("missing object %s for %s",
665 sha1_to_hex(ref->objectname), ref->refname);
666 if (!obj)
667 die("parse_object_buffer failed on %s for %s",
668 sha1_to_hex(ref->objectname), ref->refname);
669
670 /* Fill in specials first */
671 for (i = 0; i < used_atom_cnt; i++) {
672 const char *name = used_atom[i];
673 struct atom_value *v = &ref->value[i];
674 int deref = 0;
675 if (*name == '*') {
676 deref = 1;
677 name++;
678 }
679 if (!prefixcmp(name, "refname")) {
680 const char *formatp = strchr(name, ':');
681 const char *refname = ref->refname;
682
683 /* look for "short" refname format */
684 if (formatp) {
685 formatp++;
686 if (!strcmp(formatp, "short"))
687 refname = get_short_ref(ref);
688 else
689 die("unknown refname format %s",
690 formatp);
691 }
692
693 if (!deref)
694 v->s = refname;
695 else {
696 int len = strlen(refname);
697 char *s = xmalloc(len + 4);
698 sprintf(s, "%s^{}", refname);
699 v->s = s;
700 }
701 }
702 }
703
704 grab_values(ref->value, 0, obj, buf, size);
705 if (!eaten)
706 free(buf);
707
708 /* If there is no atom that wants to know about tagged
709 * object, we are done.
710 */
711 if (!need_tagged || (obj->type != OBJ_TAG))
712 return;
713
714 /* If it is a tag object, see if we use a value that derefs
715 * the object, and if we do grab the object it refers to.
716 */
717 tagged = ((struct tag *)obj)->tagged->sha1;
718
719 /* NEEDSWORK: This derefs tag only once, which
720 * is good to deal with chains of trust, but
721 * is not consistent with what deref_tag() does
722 * which peels the onion to the core.
723 */
724 buf = get_obj(tagged, &obj, &size, &eaten);
725 if (!buf)
726 die("missing object %s for %s",
727 sha1_to_hex(tagged), ref->refname);
728 if (!obj)
729 die("parse_object_buffer failed on %s for %s",
730 sha1_to_hex(tagged), ref->refname);
731 grab_values(ref->value, 1, obj, buf, size);
732 if (!eaten)
733 free(buf);
734 }
735
736 /*
737 * Given a ref, return the value for the atom. This lazily gets value
738 * out of the object by calling populate value.
739 */
740 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
741 {
742 if (!ref->value) {
743 populate_value(ref);
744 fill_missing_values(ref->value);
745 }
746 *v = &ref->value[atom];
747 }
748
749 struct grab_ref_cbdata {
750 struct refinfo **grab_array;
751 const char **grab_pattern;
752 int grab_cnt;
753 };
754
755 /*
756 * A call-back given to for_each_ref(). It is unfortunate that we
757 * need to use global variables to pass extra information to this
758 * function.
759 */
760 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
761 {
762 struct grab_ref_cbdata *cb = cb_data;
763 struct refinfo *ref;
764 int cnt;
765
766 if (*cb->grab_pattern) {
767 const char **pattern;
768 int namelen = strlen(refname);
769 for (pattern = cb->grab_pattern; *pattern; pattern++) {
770 const char *p = *pattern;
771 int plen = strlen(p);
772
773 if ((plen <= namelen) &&
774 !strncmp(refname, p, plen) &&
775 (refname[plen] == '\0' ||
776 refname[plen] == '/' ||
777 p[plen-1] == '/'))
778 break;
779 if (!fnmatch(p, refname, FNM_PATHNAME))
780 break;
781 }
782 if (!*pattern)
783 return 0;
784 }
785
786 /* We do not open the object yet; sort may only need refname
787 * to do its job and the resulting list may yet to be pruned
788 * by maxcount logic.
789 */
790 ref = xcalloc(1, sizeof(*ref));
791 ref->refname = xstrdup(refname);
792 hashcpy(ref->objectname, sha1);
793
794 cnt = cb->grab_cnt;
795 cb->grab_array = xrealloc(cb->grab_array,
796 sizeof(*cb->grab_array) * (cnt + 1));
797 cb->grab_array[cnt++] = ref;
798 cb->grab_cnt = cnt;
799 return 0;
800 }
801
802 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
803 {
804 struct atom_value *va, *vb;
805 int cmp;
806 cmp_type cmp_type = used_atom_type[s->atom];
807
808 get_value(a, s->atom, &va);
809 get_value(b, s->atom, &vb);
810 switch (cmp_type) {
811 case FIELD_STR:
812 cmp = strcmp(va->s, vb->s);
813 break;
814 default:
815 if (va->ul < vb->ul)
816 cmp = -1;
817 else if (va->ul == vb->ul)
818 cmp = 0;
819 else
820 cmp = 1;
821 break;
822 }
823 return (s->reverse) ? -cmp : cmp;
824 }
825
826 static struct ref_sort *ref_sort;
827 static int compare_refs(const void *a_, const void *b_)
828 {
829 struct refinfo *a = *((struct refinfo **)a_);
830 struct refinfo *b = *((struct refinfo **)b_);
831 struct ref_sort *s;
832
833 for (s = ref_sort; s; s = s->next) {
834 int cmp = cmp_ref_sort(s, a, b);
835 if (cmp)
836 return cmp;
837 }
838 return 0;
839 }
840
841 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
842 {
843 ref_sort = sort;
844 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
845 }
846
847 static void print_value(struct refinfo *ref, int atom, int quote_style)
848 {
849 struct atom_value *v;
850 get_value(ref, atom, &v);
851 switch (quote_style) {
852 case QUOTE_NONE:
853 fputs(v->s, stdout);
854 break;
855 case QUOTE_SHELL:
856 sq_quote_print(stdout, v->s);
857 break;
858 case QUOTE_PERL:
859 perl_quote_print(stdout, v->s);
860 break;
861 case QUOTE_PYTHON:
862 python_quote_print(stdout, v->s);
863 break;
864 case QUOTE_TCL:
865 tcl_quote_print(stdout, v->s);
866 break;
867 }
868 }
869
870 static int hex1(char ch)
871 {
872 if ('0' <= ch && ch <= '9')
873 return ch - '0';
874 else if ('a' <= ch && ch <= 'f')
875 return ch - 'a' + 10;
876 else if ('A' <= ch && ch <= 'F')
877 return ch - 'A' + 10;
878 return -1;
879 }
880 static int hex2(const char *cp)
881 {
882 if (cp[0] && cp[1])
883 return (hex1(cp[0]) << 4) | hex1(cp[1]);
884 else
885 return -1;
886 }
887
888 static void emit(const char *cp, const char *ep)
889 {
890 while (*cp && (!ep || cp < ep)) {
891 if (*cp == '%') {
892 if (cp[1] == '%')
893 cp++;
894 else {
895 int ch = hex2(cp + 1);
896 if (0 <= ch) {
897 putchar(ch);
898 cp += 3;
899 continue;
900 }
901 }
902 }
903 putchar(*cp);
904 cp++;
905 }
906 }
907
908 static void show_ref(struct refinfo *info, const char *format, int quote_style)
909 {
910 const char *cp, *sp, *ep;
911
912 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
913 ep = strchr(sp, ')');
914 if (cp < sp)
915 emit(cp, sp);
916 print_value(info, parse_atom(sp + 2, ep), quote_style);
917 }
918 if (*cp) {
919 sp = cp + strlen(cp);
920 emit(cp, sp);
921 }
922 putchar('\n');
923 }
924
925 static struct ref_sort *default_sort(void)
926 {
927 static const char cstr_name[] = "refname";
928
929 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
930
931 sort->next = NULL;
932 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
933 return sort;
934 }
935
936 static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
937 {
938 struct ref_sort **sort_tail = opt->value;
939 struct ref_sort *s;
940 int len;
941
942 if (!arg) /* should --no-sort void the list ? */
943 return -1;
944
945 *sort_tail = s = xcalloc(1, sizeof(*s));
946 sort_tail = &s->next;
947
948 if (*arg == '-') {
949 s->reverse = 1;
950 arg++;
951 }
952 len = strlen(arg);
953 s->atom = parse_atom(arg, arg+len);
954 return 0;
955 }
956
957 static char const * const for_each_ref_usage[] = {
958 "git for-each-ref [options] [<pattern>]",
959 NULL
960 };
961
962 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
963 {
964 int i, num_refs;
965 const char *format = "%(objectname) %(objecttype)\t%(refname)";
966 struct ref_sort *sort = NULL, **sort_tail = &sort;
967 int maxcount = 0, quote_style = 0;
968 struct refinfo **refs;
969 struct grab_ref_cbdata cbdata;
970
971 struct option opts[] = {
972 OPT_BIT('s', "shell", &quote_style,
973 "quote placeholders suitably for shells", QUOTE_SHELL),
974 OPT_BIT('p', "perl", &quote_style,
975 "quote placeholders suitably for perl", QUOTE_PERL),
976 OPT_BIT(0 , "python", &quote_style,
977 "quote placeholders suitably for python", QUOTE_PYTHON),
978 OPT_BIT(0 , "tcl", &quote_style,
979 "quote placeholders suitably for tcl", QUOTE_TCL),
980
981 OPT_GROUP(""),
982 OPT_INTEGER( 0 , "count", &maxcount, "show only <n> matched refs"),
983 OPT_STRING( 0 , "format", &format, "format", "format to use for the output"),
984 OPT_CALLBACK(0 , "sort", sort_tail, "key",
985 "field name to sort on", &opt_parse_sort),
986 OPT_END(),
987 };
988
989 parse_options(argc, argv, opts, for_each_ref_usage, 0);
990 if (maxcount < 0) {
991 error("invalid --count argument: `%d'", maxcount);
992 usage_with_options(for_each_ref_usage, opts);
993 }
994 if (HAS_MULTI_BITS(quote_style)) {
995 error("more than one quoting style?");
996 usage_with_options(for_each_ref_usage, opts);
997 }
998 if (verify_format(format))
999 usage_with_options(for_each_ref_usage, opts);
1000
1001 if (!sort)
1002 sort = default_sort();
1003 sort_atom_limit = used_atom_cnt;
1004
1005 memset(&cbdata, 0, sizeof(cbdata));
1006 cbdata.grab_pattern = argv;
1007 for_each_ref(grab_single_ref, &cbdata);
1008 refs = cbdata.grab_array;
1009 num_refs = cbdata.grab_cnt;
1010
1011 for (i = 0; i < used_atom_cnt; i++) {
1012 if (used_atom[i][0] == '*') {
1013 need_tagged = 1;
1014 break;
1015 }
1016 }
1017
1018 sort_refs(sort, refs, num_refs);
1019
1020 if (!maxcount || num_refs < maxcount)
1021 maxcount = num_refs;
1022 for (i = 0; i < maxcount; i++)
1023 show_ref(refs[i], format, quote_style);
1024 return 0;
1025 }