Merge branch 'db/maint-checkout-b' into maint
[git/dscho.git] / builtin-for-each-ref.c
blob72c087840c39bc03b142ba620f94800d40264eb9
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"
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
19 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
21 struct atom_value {
22 const char *s;
23 unsigned long ul; /* used for sorting when not FIELD_STR */
26 struct ref_sort {
27 struct ref_sort *next;
28 int atom; /* index into used_atom array */
29 unsigned reverse : 1;
32 struct refinfo {
33 char *refname;
34 unsigned char objectname[20];
35 struct atom_value *value;
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" },
72 * An atom is a valid field atom listed above, possibly prefixed with
73 * a "*" to denote deref_tag().
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.
81 static const char **used_atom;
82 static cmp_type *used_atom_type;
83 static int used_atom_cnt, sort_atom_limit, need_tagged;
86 * Used to parse format string and sort specifiers
88 static int parse_atom(const char *atom, const char *ep)
90 const char *sp;
91 int i, at;
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);
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;
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);
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.
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;
122 if (ARRAY_SIZE(valid_atom) <= i)
123 die("unknown field name: %.*s", (int)(ep-atom), atom);
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;
138 * In a format string, find the next occurrence of %(atom).
140 static const char *find_next(const char *cp)
142 while (*cp) {
143 if (*cp == '%') {
144 /* %( is the start of an atom;
145 * %% is a quoted per-cent.
147 if (cp[1] == '(')
148 return cp;
149 else if (cp[1] == '%')
150 cp++; /* skip over two % */
151 /* otherwise this is a singleton, literal % */
153 cp++;
155 return NULL;
159 * Make sure the format string is well formed, and parse out
160 * the used atoms.
162 static int verify_format(const char *format)
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;
173 return 0;
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.
182 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
184 enum object_type type;
185 void *buf = read_sha1_file(sha1, &type, sz);
187 if (buf)
188 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
189 else
190 *obj = NULL;
191 return buf;
194 /* See grab_values */
195 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
197 int i;
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;
214 else if (!strcmp(name, "objectname")) {
215 char *s = xmalloc(41);
216 strcpy(s, sha1_to_hex(obj->sha1));
217 v->s = s;
222 /* See grab_values */
223 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
225 int i;
226 struct tag *tag = (struct tag *) obj;
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;
247 static int num_parents(struct commit *commit)
249 struct commit_list *parents;
250 int i;
252 for (i = 0, parents = commit->parents;
253 parents;
254 parents = parents->next)
255 i++;
256 return i;
259 /* See grab_values */
260 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
262 int i;
263 struct commit *commit = (struct commit *) obj;
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;
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;
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] = ' ';
297 if (!i)
298 *s = '\0';
303 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
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;
318 return "";
321 static const char *copy_line(const char *buf)
323 const char *eol = strchrnul(buf, '\n');
324 return xmemdupz(buf, eol - buf);
327 static const char *copy_name(const char *buf)
329 const char *cp;
330 for (cp = buf; *cp && *cp != '\n'; cp++) {
331 if (!strncmp(cp, " <", 2))
332 return xmemdupz(buf, cp - buf);
334 return "";
337 static const char *copy_email(const char *buf)
339 const char *email = strchr(buf, '<');
340 const char *eoemail = strchr(email, '>');
341 if (!email || !eoemail)
342 return "";
343 return xmemdupz(email, eoemail + 1 - email);
346 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
348 const char *eoemail = strstr(buf, "> ");
349 char *zone;
350 unsigned long timestamp;
351 long tz;
352 enum date_mode date_mode = DATE_NORMAL;
353 const char *formatp;
356 * We got here because atomname ends in "date" or "date<something>";
357 * it's not possible that <something> is not ":<format>" because
358 * parse_atom() wouldn't have allowed it, so we can assume that no
359 * ":" means no format is specified, and use the default.
361 formatp = strchr(atomname, ':');
362 if (formatp != NULL) {
363 formatp++;
364 date_mode = parse_date_format(formatp);
367 if (!eoemail)
368 goto bad;
369 timestamp = strtoul(eoemail + 2, &zone, 10);
370 if (timestamp == ULONG_MAX)
371 goto bad;
372 tz = strtol(zone, NULL, 10);
373 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
374 goto bad;
375 v->s = xstrdup(show_date(timestamp, tz, date_mode));
376 v->ul = timestamp;
377 return;
378 bad:
379 v->s = "";
380 v->ul = 0;
383 /* See grab_values */
384 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
386 int i;
387 int wholen = strlen(who);
388 const char *wholine = NULL;
390 for (i = 0; i < used_atom_cnt; i++) {
391 const char *name = used_atom[i];
392 struct atom_value *v = &val[i];
393 if (!!deref != (*name == '*'))
394 continue;
395 if (deref)
396 name++;
397 if (strncmp(who, name, wholen))
398 continue;
399 if (name[wholen] != 0 &&
400 strcmp(name + wholen, "name") &&
401 strcmp(name + wholen, "email") &&
402 prefixcmp(name + wholen, "date"))
403 continue;
404 if (!wholine)
405 wholine = find_wholine(who, wholen, buf, sz);
406 if (!wholine)
407 return; /* no point looking for it */
408 if (name[wholen] == 0)
409 v->s = copy_line(wholine);
410 else if (!strcmp(name + wholen, "name"))
411 v->s = copy_name(wholine);
412 else if (!strcmp(name + wholen, "email"))
413 v->s = copy_email(wholine);
414 else if (!prefixcmp(name + wholen, "date"))
415 grab_date(wholine, v, name);
418 /* For a tag or a commit object, if "creator" or "creatordate" is
419 * requested, do something special.
421 if (strcmp(who, "tagger") && strcmp(who, "committer"))
422 return; /* "author" for commit object is not wanted */
423 if (!wholine)
424 wholine = find_wholine(who, wholen, buf, sz);
425 if (!wholine)
426 return;
427 for (i = 0; i < used_atom_cnt; i++) {
428 const char *name = used_atom[i];
429 struct atom_value *v = &val[i];
430 if (!!deref != (*name == '*'))
431 continue;
432 if (deref)
433 name++;
435 if (!prefixcmp(name, "creatordate"))
436 grab_date(wholine, v, name);
437 else if (!strcmp(name, "creator"))
438 v->s = copy_line(wholine);
442 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
444 while (*buf) {
445 const char *eol = strchr(buf, '\n');
446 if (!eol)
447 return;
448 if (eol[1] == '\n') {
449 buf = eol + 1;
450 break; /* found end of header */
452 buf = eol + 1;
454 while (*buf == '\n')
455 buf++;
456 if (!*buf)
457 return;
458 *sub = buf; /* first non-empty line */
459 buf = strchr(buf, '\n');
460 if (!buf) {
461 *body = "";
462 return; /* no body */
464 while (*buf == '\n')
465 buf++; /* skip blank between subject and body */
466 *body = buf;
469 /* See grab_values */
470 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
472 int i;
473 const char *subpos = NULL, *bodypos = NULL;
475 for (i = 0; i < used_atom_cnt; i++) {
476 const char *name = used_atom[i];
477 struct atom_value *v = &val[i];
478 if (!!deref != (*name == '*'))
479 continue;
480 if (deref)
481 name++;
482 if (strcmp(name, "subject") &&
483 strcmp(name, "body") &&
484 strcmp(name, "contents"))
485 continue;
486 if (!subpos)
487 find_subpos(buf, sz, &subpos, &bodypos);
488 if (!subpos)
489 return;
491 if (!strcmp(name, "subject"))
492 v->s = copy_line(subpos);
493 else if (!strcmp(name, "body"))
494 v->s = xstrdup(bodypos);
495 else if (!strcmp(name, "contents"))
496 v->s = xstrdup(subpos);
500 /* We want to have empty print-string for field requests
501 * that do not apply (e.g. "authordate" for a tag object)
503 static void fill_missing_values(struct atom_value *val)
505 int i;
506 for (i = 0; i < used_atom_cnt; i++) {
507 struct atom_value *v = &val[i];
508 if (v->s == NULL)
509 v->s = "";
514 * val is a list of atom_value to hold returned values. Extract
515 * the values for atoms in used_atom array out of (obj, buf, sz).
516 * when deref is false, (obj, buf, sz) is the object that is
517 * pointed at by the ref itself; otherwise it is the object the
518 * ref (which is a tag) refers to.
520 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
522 grab_common_values(val, deref, obj, buf, sz);
523 switch (obj->type) {
524 case OBJ_TAG:
525 grab_tag_values(val, deref, obj, buf, sz);
526 grab_sub_body_contents(val, deref, obj, buf, sz);
527 grab_person("tagger", val, deref, obj, buf, sz);
528 break;
529 case OBJ_COMMIT:
530 grab_commit_values(val, deref, obj, buf, sz);
531 grab_sub_body_contents(val, deref, obj, buf, sz);
532 grab_person("author", val, deref, obj, buf, sz);
533 grab_person("committer", val, deref, obj, buf, sz);
534 break;
535 case OBJ_TREE:
536 // grab_tree_values(val, deref, obj, buf, sz);
537 break;
538 case OBJ_BLOB:
539 // grab_blob_values(val, deref, obj, buf, sz);
540 break;
541 default:
542 die("Eh? Object of type %d?", obj->type);
547 * Parse the object referred by ref, and grab needed value.
549 static void populate_value(struct refinfo *ref)
551 void *buf;
552 struct object *obj;
553 int eaten, i;
554 unsigned long size;
555 const unsigned char *tagged;
557 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
559 buf = get_obj(ref->objectname, &obj, &size, &eaten);
560 if (!buf)
561 die("missing object %s for %s",
562 sha1_to_hex(ref->objectname), ref->refname);
563 if (!obj)
564 die("parse_object_buffer failed on %s for %s",
565 sha1_to_hex(ref->objectname), ref->refname);
567 /* Fill in specials first */
568 for (i = 0; i < used_atom_cnt; i++) {
569 const char *name = used_atom[i];
570 struct atom_value *v = &ref->value[i];
571 if (!strcmp(name, "refname"))
572 v->s = ref->refname;
573 else if (!strcmp(name, "*refname")) {
574 int len = strlen(ref->refname);
575 char *s = xmalloc(len + 4);
576 sprintf(s, "%s^{}", ref->refname);
577 v->s = s;
581 grab_values(ref->value, 0, obj, buf, size);
582 if (!eaten)
583 free(buf);
585 /* If there is no atom that wants to know about tagged
586 * object, we are done.
588 if (!need_tagged || (obj->type != OBJ_TAG))
589 return;
591 /* If it is a tag object, see if we use a value that derefs
592 * the object, and if we do grab the object it refers to.
594 tagged = ((struct tag *)obj)->tagged->sha1;
596 /* NEEDSWORK: This derefs tag only once, which
597 * is good to deal with chains of trust, but
598 * is not consistent with what deref_tag() does
599 * which peels the onion to the core.
601 buf = get_obj(tagged, &obj, &size, &eaten);
602 if (!buf)
603 die("missing object %s for %s",
604 sha1_to_hex(tagged), ref->refname);
605 if (!obj)
606 die("parse_object_buffer failed on %s for %s",
607 sha1_to_hex(tagged), ref->refname);
608 grab_values(ref->value, 1, obj, buf, size);
609 if (!eaten)
610 free(buf);
614 * Given a ref, return the value for the atom. This lazily gets value
615 * out of the object by calling populate value.
617 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
619 if (!ref->value) {
620 populate_value(ref);
621 fill_missing_values(ref->value);
623 *v = &ref->value[atom];
626 struct grab_ref_cbdata {
627 struct refinfo **grab_array;
628 const char **grab_pattern;
629 int grab_cnt;
633 * A call-back given to for_each_ref(). It is unfortunate that we
634 * need to use global variables to pass extra information to this
635 * function.
637 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
639 struct grab_ref_cbdata *cb = cb_data;
640 struct refinfo *ref;
641 int cnt;
643 if (*cb->grab_pattern) {
644 const char **pattern;
645 int namelen = strlen(refname);
646 for (pattern = cb->grab_pattern; *pattern; pattern++) {
647 const char *p = *pattern;
648 int plen = strlen(p);
650 if ((plen <= namelen) &&
651 !strncmp(refname, p, plen) &&
652 (refname[plen] == '\0' ||
653 refname[plen] == '/' ||
654 p[plen-1] == '/'))
655 break;
656 if (!fnmatch(p, refname, FNM_PATHNAME))
657 break;
659 if (!*pattern)
660 return 0;
663 /* We do not open the object yet; sort may only need refname
664 * to do its job and the resulting list may yet to be pruned
665 * by maxcount logic.
667 ref = xcalloc(1, sizeof(*ref));
668 ref->refname = xstrdup(refname);
669 hashcpy(ref->objectname, sha1);
671 cnt = cb->grab_cnt;
672 cb->grab_array = xrealloc(cb->grab_array,
673 sizeof(*cb->grab_array) * (cnt + 1));
674 cb->grab_array[cnt++] = ref;
675 cb->grab_cnt = cnt;
676 return 0;
679 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
681 struct atom_value *va, *vb;
682 int cmp;
683 cmp_type cmp_type = used_atom_type[s->atom];
685 get_value(a, s->atom, &va);
686 get_value(b, s->atom, &vb);
687 switch (cmp_type) {
688 case FIELD_STR:
689 cmp = strcmp(va->s, vb->s);
690 break;
691 default:
692 if (va->ul < vb->ul)
693 cmp = -1;
694 else if (va->ul == vb->ul)
695 cmp = 0;
696 else
697 cmp = 1;
698 break;
700 return (s->reverse) ? -cmp : cmp;
703 static struct ref_sort *ref_sort;
704 static int compare_refs(const void *a_, const void *b_)
706 struct refinfo *a = *((struct refinfo **)a_);
707 struct refinfo *b = *((struct refinfo **)b_);
708 struct ref_sort *s;
710 for (s = ref_sort; s; s = s->next) {
711 int cmp = cmp_ref_sort(s, a, b);
712 if (cmp)
713 return cmp;
715 return 0;
718 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
720 ref_sort = sort;
721 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
724 static void print_value(struct refinfo *ref, int atom, int quote_style)
726 struct atom_value *v;
727 get_value(ref, atom, &v);
728 switch (quote_style) {
729 case QUOTE_NONE:
730 fputs(v->s, stdout);
731 break;
732 case QUOTE_SHELL:
733 sq_quote_print(stdout, v->s);
734 break;
735 case QUOTE_PERL:
736 perl_quote_print(stdout, v->s);
737 break;
738 case QUOTE_PYTHON:
739 python_quote_print(stdout, v->s);
740 break;
741 case QUOTE_TCL:
742 tcl_quote_print(stdout, v->s);
743 break;
747 static int hex1(char ch)
749 if ('0' <= ch && ch <= '9')
750 return ch - '0';
751 else if ('a' <= ch && ch <= 'f')
752 return ch - 'a' + 10;
753 else if ('A' <= ch && ch <= 'F')
754 return ch - 'A' + 10;
755 return -1;
757 static int hex2(const char *cp)
759 if (cp[0] && cp[1])
760 return (hex1(cp[0]) << 4) | hex1(cp[1]);
761 else
762 return -1;
765 static void emit(const char *cp, const char *ep)
767 while (*cp && (!ep || cp < ep)) {
768 if (*cp == '%') {
769 if (cp[1] == '%')
770 cp++;
771 else {
772 int ch = hex2(cp + 1);
773 if (0 <= ch) {
774 putchar(ch);
775 cp += 3;
776 continue;
780 putchar(*cp);
781 cp++;
785 static void show_ref(struct refinfo *info, const char *format, int quote_style)
787 const char *cp, *sp, *ep;
789 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
790 ep = strchr(sp, ')');
791 if (cp < sp)
792 emit(cp, sp);
793 print_value(info, parse_atom(sp + 2, ep), quote_style);
795 if (*cp) {
796 sp = cp + strlen(cp);
797 emit(cp, sp);
799 putchar('\n');
802 static struct ref_sort *default_sort(void)
804 static const char cstr_name[] = "refname";
806 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
808 sort->next = NULL;
809 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
810 return sort;
813 static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
815 struct ref_sort **sort_tail = opt->value;
816 struct ref_sort *s;
817 int len;
819 if (!arg) /* should --no-sort void the list ? */
820 return -1;
822 *sort_tail = s = xcalloc(1, sizeof(*s));
823 sort_tail = &s->next;
825 if (*arg == '-') {
826 s->reverse = 1;
827 arg++;
829 len = strlen(arg);
830 s->atom = parse_atom(arg, arg+len);
831 return 0;
834 static char const * const for_each_ref_usage[] = {
835 "git for-each-ref [options] [<pattern>]",
836 NULL
839 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
841 int i, num_refs;
842 const char *format = "%(objectname) %(objecttype)\t%(refname)";
843 struct ref_sort *sort = NULL, **sort_tail = &sort;
844 int maxcount = 0, quote_style = 0;
845 struct refinfo **refs;
846 struct grab_ref_cbdata cbdata;
848 struct option opts[] = {
849 OPT_BIT('s', "shell", &quote_style,
850 "quote placeholders suitably for shells", QUOTE_SHELL),
851 OPT_BIT('p', "perl", &quote_style,
852 "quote placeholders suitably for perl", QUOTE_PERL),
853 OPT_BIT(0 , "python", &quote_style,
854 "quote placeholders suitably for python", QUOTE_PYTHON),
855 OPT_BIT(0 , "tcl", &quote_style,
856 "quote placeholders suitably for tcl", QUOTE_TCL),
858 OPT_GROUP(""),
859 OPT_INTEGER( 0 , "count", &maxcount, "show only <n> matched refs"),
860 OPT_STRING( 0 , "format", &format, "format", "format to use for the output"),
861 OPT_CALLBACK(0 , "sort", sort_tail, "key",
862 "field name to sort on", &opt_parse_sort),
863 OPT_END(),
866 parse_options(argc, argv, opts, for_each_ref_usage, 0);
867 if (maxcount < 0) {
868 error("invalid --count argument: `%d'", maxcount);
869 usage_with_options(for_each_ref_usage, opts);
871 if (HAS_MULTI_BITS(quote_style)) {
872 error("more than one quoting style?");
873 usage_with_options(for_each_ref_usage, opts);
875 if (verify_format(format))
876 usage_with_options(for_each_ref_usage, opts);
878 if (!sort)
879 sort = default_sort();
880 sort_atom_limit = used_atom_cnt;
882 memset(&cbdata, 0, sizeof(cbdata));
883 cbdata.grab_pattern = argv;
884 for_each_ref(grab_single_ref, &cbdata);
885 refs = cbdata.grab_array;
886 num_refs = cbdata.grab_cnt;
888 for (i = 0; i < used_atom_cnt; i++) {
889 if (used_atom[i][0] == '*') {
890 need_tagged = 1;
891 break;
895 sort_refs(sort, refs, num_refs);
897 if (!maxcount || num_refs < maxcount)
898 maxcount = num_refs;
899 for (i = 0; i < maxcount; i++)
900 show_ref(refs[i], format, quote_style);
901 return 0;