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cvsserver: Add some useful commandline options
[git/spearce.git] / builtin-for-each-ref.c
blob2b218425aab2c37a826bfbe22535f2e5b7002a26
1 #include "cache.h"
2 #include "refs.h"
3 #include "object.h"
4 #include "tag.h"
5 #include "commit.h"
6 #include "tree.h"
7 #include "blob.h"
8 #include "quote.h"
9
10 /* Quoting styles */
11 #define QUOTE_NONE 0
12 #define QUOTE_SHELL 1
13 #define QUOTE_PERL 2
14 #define QUOTE_PYTHON 3
15 #define QUOTE_TCL 4
16
17 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
18
19 struct atom_value {
20 const char *s;
21 unsigned long ul; /* used for sorting when not FIELD_STR */
22 };
23
24 struct ref_sort {
25 struct ref_sort *next;
26 int atom; /* index into used_atom array */
27 unsigned reverse : 1;
28 };
29
30 struct refinfo {
31 char *refname;
32 unsigned char objectname[20];
33 struct atom_value *value;
34 };
35
36 static struct {
37 const char *name;
38 cmp_type cmp_type;
39 } valid_atom[] = {
40 { "refname" },
41 { "objecttype" },
42 { "objectsize", FIELD_ULONG },
43 { "objectname" },
44 { "tree" },
45 { "parent" }, /* NEEDSWORK: how to address 2nd and later parents? */
46 { "numparent", FIELD_ULONG },
47 { "object" },
48 { "type" },
49 { "tag" },
50 { "author" },
51 { "authorname" },
52 { "authoremail" },
53 { "authordate", FIELD_TIME },
54 { "committer" },
55 { "committername" },
56 { "committeremail" },
57 { "committerdate", FIELD_TIME },
58 { "tagger" },
59 { "taggername" },
60 { "taggeremail" },
61 { "taggerdate", FIELD_TIME },
62 { "creator" },
63 { "creatordate", FIELD_TIME },
64 { "subject" },
65 { "body" },
66 { "contents" },
67 };
68
69 /*
70 * An atom is a valid field atom listed above, possibly prefixed with
71 * a "*" to denote deref_tag().
72 *
73 * We parse given format string and sort specifiers, and make a list
74 * of properties that we need to extract out of objects. refinfo
75 * structure will hold an array of values extracted that can be
76 * indexed with the "atom number", which is an index into this
77 * array.
78 */
79 static const char **used_atom;
80 static cmp_type *used_atom_type;
81 static int used_atom_cnt, sort_atom_limit, need_tagged;
82
83 /*
84 * Used to parse format string and sort specifiers
85 */
86 static int parse_atom(const char *atom, const char *ep)
87 {
88 const char *sp;
89 char *n;
90 int i, at;
91
92 sp = atom;
93 if (*sp == '*' && sp < ep)
94 sp++; /* deref */
95 if (ep <= sp)
96 die("malformed field name: %.*s", (int)(ep-atom), atom);
97
98 /* Do we have the atom already used elsewhere? */
99 for (i = 0; i < used_atom_cnt; i++) {
100 int len = strlen(used_atom[i]);
101 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
102 return i;
103 }
104
105 /* Is the atom a valid one? */
106 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
107 int len = strlen(valid_atom[i].name);
108 if (len == ep - sp && !memcmp(valid_atom[i].name, sp, len))
109 break;
110 }
111
112 if (ARRAY_SIZE(valid_atom) <= i)
113 die("unknown field name: %.*s", (int)(ep-atom), atom);
114
115 /* Add it in, including the deref prefix */
116 at = used_atom_cnt;
117 used_atom_cnt++;
118 used_atom = xrealloc(used_atom,
119 (sizeof *used_atom) * used_atom_cnt);
120 used_atom_type = xrealloc(used_atom_type,
121 (sizeof(*used_atom_type) * used_atom_cnt));
122 n = xmalloc(ep - atom + 1);
123 memcpy(n, atom, ep - atom);
124 n[ep-atom] = 0;
125 used_atom[at] = n;
126 used_atom_type[at] = valid_atom[i].cmp_type;
127 return at;
128 }
129
130 /*
131 * In a format string, find the next occurrence of %(atom).
132 */
133 static const char *find_next(const char *cp)
134 {
135 while (*cp) {
136 if (*cp == '%') {
137 /* %( is the start of an atom;
138 * %% is a quoted per-cent.
139 */
140 if (cp[1] == '(')
141 return cp;
142 else if (cp[1] == '%')
143 cp++; /* skip over two % */
144 /* otherwise this is a singleton, literal % */
145 }
146 cp++;
147 }
148 return NULL;
149 }
150
151 /*
152 * Make sure the format string is well formed, and parse out
153 * the used atoms.
154 */
155 static void verify_format(const char *format)
156 {
157 const char *cp, *sp;
158 for (cp = format; *cp && (sp = find_next(cp)); ) {
159 const char *ep = strchr(sp, ')');
160 if (!ep)
161 die("malformatted format string %s", sp);
162 /* sp points at "%(" and ep points at the closing ")" */
163 parse_atom(sp + 2, ep);
164 cp = ep + 1;
165 }
166 }
167
168 /*
169 * Given an object name, read the object data and size, and return a
170 * "struct object". If the object data we are returning is also borrowed
171 * by the "struct object" representation, set *eaten as well---it is a
172 * signal from parse_object_buffer to us not to free the buffer.
173 */
174 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
175 {
176 enum object_type type;
177 void *buf = read_sha1_file(sha1, &type, sz);
178
179 if (buf)
180 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
181 else
182 *obj = NULL;
183 return buf;
184 }
185
186 /* See grab_values */
187 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
188 {
189 int i;
190
191 for (i = 0; i < used_atom_cnt; i++) {
192 const char *name = used_atom[i];
193 struct atom_value *v = &val[i];
194 if (!!deref != (*name == '*'))
195 continue;
196 if (deref)
197 name++;
198 if (!strcmp(name, "objecttype"))
199 v->s = typename(obj->type);
200 else if (!strcmp(name, "objectsize")) {
201 char *s = xmalloc(40);
202 sprintf(s, "%lu", sz);
203 v->ul = sz;
204 v->s = s;
205 }
206 else if (!strcmp(name, "objectname")) {
207 char *s = xmalloc(41);
208 strcpy(s, sha1_to_hex(obj->sha1));
209 v->s = s;
210 }
211 }
212 }
213
214 /* See grab_values */
215 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
216 {
217 int i;
218 struct tag *tag = (struct tag *) obj;
219
220 for (i = 0; i < used_atom_cnt; i++) {
221 const char *name = used_atom[i];
222 struct atom_value *v = &val[i];
223 if (!!deref != (*name == '*'))
224 continue;
225 if (deref)
226 name++;
227 if (!strcmp(name, "tag"))
228 v->s = tag->tag;
229 }
230 }
231
232 static int num_parents(struct commit *commit)
233 {
234 struct commit_list *parents;
235 int i;
236
237 for (i = 0, parents = commit->parents;
238 parents;
239 parents = parents->next)
240 i++;
241 return i;
242 }
243
244 /* See grab_values */
245 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
246 {
247 int i;
248 struct commit *commit = (struct commit *) obj;
249
250 for (i = 0; i < used_atom_cnt; i++) {
251 const char *name = used_atom[i];
252 struct atom_value *v = &val[i];
253 if (!!deref != (*name == '*'))
254 continue;
255 if (deref)
256 name++;
257 if (!strcmp(name, "tree")) {
258 char *s = xmalloc(41);
259 strcpy(s, sha1_to_hex(commit->tree->object.sha1));
260 v->s = s;
261 }
262 if (!strcmp(name, "numparent")) {
263 char *s = xmalloc(40);
264 sprintf(s, "%lu", v->ul);
265 v->s = s;
266 v->ul = num_parents(commit);
267 }
268 else if (!strcmp(name, "parent")) {
269 int num = num_parents(commit);
270 int i;
271 struct commit_list *parents;
272 char *s = xmalloc(42 * num);
273 v->s = s;
274 for (i = 0, parents = commit->parents;
275 parents;
276 parents = parents->next, i = i + 42) {
277 struct commit *parent = parents->item;
278 strcpy(s+i, sha1_to_hex(parent->object.sha1));
279 if (parents->next)
280 s[i+40] = ' ';
281 }
282 }
283 }
284 }
285
286 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
287 {
288 const char *eol;
289 while (*buf) {
290 if (!strncmp(buf, who, wholen) &&
291 buf[wholen] == ' ')
292 return buf + wholen + 1;
293 eol = strchr(buf, '\n');
294 if (!eol)
295 return "";
296 eol++;
297 if (eol[1] == '\n')
298 return ""; /* end of header */
299 buf = eol;
300 }
301 return "";
302 }
303
304 static const char *copy_line(const char *buf)
305 {
306 const char *eol = strchr(buf, '\n');
307 char *line;
308 int len;
309 if (!eol)
310 return "";
311 len = eol - buf;
312 line = xmalloc(len + 1);
313 memcpy(line, buf, len);
314 line[len] = 0;
315 return line;
316 }
317
318 static const char *copy_name(const char *buf)
319 {
320 const char *eol = strchr(buf, '\n');
321 const char *eoname = strstr(buf, " <");
322 char *line;
323 int len;
324 if (!(eoname && eol && eoname < eol))
325 return "";
326 len = eoname - buf;
327 line = xmalloc(len + 1);
328 memcpy(line, buf, len);
329 line[len] = 0;
330 return line;
331 }
332
333 static const char *copy_email(const char *buf)
334 {
335 const char *email = strchr(buf, '<');
336 const char *eoemail = strchr(email, '>');
337 char *line;
338 int len;
339 if (!email || !eoemail)
340 return "";
341 eoemail++;
342 len = eoemail - email;
343 line = xmalloc(len + 1);
344 memcpy(line, email, len);
345 line[len] = 0;
346 return line;
347 }
348
349 static void grab_date(const char *buf, struct atom_value *v)
350 {
351 const char *eoemail = strstr(buf, "> ");
352 char *zone;
353 unsigned long timestamp;
354 long tz;
355
356 if (!eoemail)
357 goto bad;
358 timestamp = strtoul(eoemail + 2, &zone, 10);
359 if (timestamp == ULONG_MAX)
360 goto bad;
361 tz = strtol(zone, NULL, 10);
362 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
363 goto bad;
364 v->s = xstrdup(show_date(timestamp, tz, 0));
365 v->ul = timestamp;
366 return;
367 bad:
368 v->s = "";
369 v->ul = 0;
370 }
371
372 /* See grab_values */
373 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
374 {
375 int i;
376 int wholen = strlen(who);
377 const char *wholine = NULL;
378
379 for (i = 0; i < used_atom_cnt; i++) {
380 const char *name = used_atom[i];
381 struct atom_value *v = &val[i];
382 if (!!deref != (*name == '*'))
383 continue;
384 if (deref)
385 name++;
386 if (strncmp(who, name, wholen))
387 continue;
388 if (name[wholen] != 0 &&
389 strcmp(name + wholen, "name") &&
390 strcmp(name + wholen, "email") &&
391 strcmp(name + wholen, "date"))
392 continue;
393 if (!wholine)
394 wholine = find_wholine(who, wholen, buf, sz);
395 if (!wholine)
396 return; /* no point looking for it */
397 if (name[wholen] == 0)
398 v->s = copy_line(wholine);
399 else if (!strcmp(name + wholen, "name"))
400 v->s = copy_name(wholine);
401 else if (!strcmp(name + wholen, "email"))
402 v->s = copy_email(wholine);
403 else if (!strcmp(name + wholen, "date"))
404 grab_date(wholine, v);
405 }
406
407 /* For a tag or a commit object, if "creator" or "creatordate" is
408 * requested, do something special.
409 */
410 if (strcmp(who, "tagger") && strcmp(who, "committer"))
411 return; /* "author" for commit object is not wanted */
412 if (!wholine)
413 wholine = find_wholine(who, wholen, buf, sz);
414 if (!wholine)
415 return;
416 for (i = 0; i < used_atom_cnt; i++) {
417 const char *name = used_atom[i];
418 struct atom_value *v = &val[i];
419 if (!!deref != (*name == '*'))
420 continue;
421 if (deref)
422 name++;
423
424 if (!strcmp(name, "creatordate"))
425 grab_date(wholine, v);
426 else if (!strcmp(name, "creator"))
427 v->s = copy_line(wholine);
428 }
429 }
430
431 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
432 {
433 while (*buf) {
434 const char *eol = strchr(buf, '\n');
435 if (!eol)
436 return;
437 if (eol[1] == '\n') {
438 buf = eol + 1;
439 break; /* found end of header */
440 }
441 buf = eol + 1;
442 }
443 while (*buf == '\n')
444 buf++;
445 if (!*buf)
446 return;
447 *sub = buf; /* first non-empty line */
448 buf = strchr(buf, '\n');
449 if (!buf)
450 return; /* no body */
451 while (*buf == '\n')
452 buf++; /* skip blank between subject and body */
453 *body = buf;
454 }
455
456 /* See grab_values */
457 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
458 {
459 int i;
460 const char *subpos = NULL, *bodypos = NULL;
461
462 for (i = 0; i < used_atom_cnt; i++) {
463 const char *name = used_atom[i];
464 struct atom_value *v = &val[i];
465 if (!!deref != (*name == '*'))
466 continue;
467 if (deref)
468 name++;
469 if (strcmp(name, "subject") &&
470 strcmp(name, "body") &&
471 strcmp(name, "contents"))
472 continue;
473 if (!subpos)
474 find_subpos(buf, sz, &subpos, &bodypos);
475 if (!subpos)
476 return;
477
478 if (!strcmp(name, "subject"))
479 v->s = copy_line(subpos);
480 else if (!strcmp(name, "body"))
481 v->s = xstrdup(bodypos);
482 else if (!strcmp(name, "contents"))
483 v->s = xstrdup(subpos);
484 }
485 }
486
487 /* We want to have empty print-string for field requests
488 * that do not apply (e.g. "authordate" for a tag object)
489 */
490 static void fill_missing_values(struct atom_value *val)
491 {
492 int i;
493 for (i = 0; i < used_atom_cnt; i++) {
494 struct atom_value *v = &val[i];
495 if (v->s == NULL)
496 v->s = "";
497 }
498 }
499
500 /*
501 * val is a list of atom_value to hold returned values. Extract
502 * the values for atoms in used_atom array out of (obj, buf, sz).
503 * when deref is false, (obj, buf, sz) is the object that is
504 * pointed at by the ref itself; otherwise it is the object the
505 * ref (which is a tag) refers to.
506 */
507 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
508 {
509 grab_common_values(val, deref, obj, buf, sz);
510 switch (obj->type) {
511 case OBJ_TAG:
512 grab_tag_values(val, deref, obj, buf, sz);
513 grab_sub_body_contents(val, deref, obj, buf, sz);
514 grab_person("tagger", val, deref, obj, buf, sz);
515 break;
516 case OBJ_COMMIT:
517 grab_commit_values(val, deref, obj, buf, sz);
518 grab_sub_body_contents(val, deref, obj, buf, sz);
519 grab_person("author", val, deref, obj, buf, sz);
520 grab_person("committer", val, deref, obj, buf, sz);
521 break;
522 case OBJ_TREE:
523 // grab_tree_values(val, deref, obj, buf, sz);
524 break;
525 case OBJ_BLOB:
526 // grab_blob_values(val, deref, obj, buf, sz);
527 break;
528 default:
529 die("Eh? Object of type %d?", obj->type);
530 }
531 }
532
533 /*
534 * Parse the object referred by ref, and grab needed value.
535 */
536 static void populate_value(struct refinfo *ref)
537 {
538 void *buf;
539 struct object *obj;
540 int eaten, i;
541 unsigned long size;
542 const unsigned char *tagged;
543
544 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
545
546 buf = get_obj(ref->objectname, &obj, &size, &eaten);
547 if (!buf)
548 die("missing object %s for %s",
549 sha1_to_hex(ref->objectname), ref->refname);
550 if (!obj)
551 die("parse_object_buffer failed on %s for %s",
552 sha1_to_hex(ref->objectname), ref->refname);
553
554 /* Fill in specials first */
555 for (i = 0; i < used_atom_cnt; i++) {
556 const char *name = used_atom[i];
557 struct atom_value *v = &ref->value[i];
558 if (!strcmp(name, "refname"))
559 v->s = ref->refname;
560 else if (!strcmp(name, "*refname")) {
561 int len = strlen(ref->refname);
562 char *s = xmalloc(len + 4);
563 sprintf(s, "%s^{}", ref->refname);
564 v->s = s;
565 }
566 }
567
568 grab_values(ref->value, 0, obj, buf, size);
569 if (!eaten)
570 free(buf);
571
572 /* If there is no atom that wants to know about tagged
573 * object, we are done.
574 */
575 if (!need_tagged || (obj->type != OBJ_TAG))
576 return;
577
578 /* If it is a tag object, see if we use a value that derefs
579 * the object, and if we do grab the object it refers to.
580 */
581 tagged = ((struct tag *)obj)->tagged->sha1;
582
583 /* NEEDSWORK: This derefs tag only once, which
584 * is good to deal with chains of trust, but
585 * is not consistent with what deref_tag() does
586 * which peels the onion to the core.
587 */
588 buf = get_obj(tagged, &obj, &size, &eaten);
589 if (!buf)
590 die("missing object %s for %s",
591 sha1_to_hex(tagged), ref->refname);
592 if (!obj)
593 die("parse_object_buffer failed on %s for %s",
594 sha1_to_hex(tagged), ref->refname);
595 grab_values(ref->value, 1, obj, buf, size);
596 if (!eaten)
597 free(buf);
598 }
599
600 /*
601 * Given a ref, return the value for the atom. This lazily gets value
602 * out of the object by calling populate value.
603 */
604 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
605 {
606 if (!ref->value) {
607 populate_value(ref);
608 fill_missing_values(ref->value);
609 }
610 *v = &ref->value[atom];
611 }
612
613 struct grab_ref_cbdata {
614 struct refinfo **grab_array;
615 const char **grab_pattern;
616 int grab_cnt;
617 };
618
619 /*
620 * A call-back given to for_each_ref(). It is unfortunate that we
621 * need to use global variables to pass extra information to this
622 * function.
623 */
624 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
625 {
626 struct grab_ref_cbdata *cb = cb_data;
627 struct refinfo *ref;
628 int cnt;
629
630 if (*cb->grab_pattern) {
631 const char **pattern;
632 int namelen = strlen(refname);
633 for (pattern = cb->grab_pattern; *pattern; pattern++) {
634 const char *p = *pattern;
635 int plen = strlen(p);
636
637 if ((plen <= namelen) &&
638 !strncmp(refname, p, plen) &&
639 (refname[plen] == '\0' ||
640 refname[plen] == '/'))
641 break;
642 if (!fnmatch(p, refname, FNM_PATHNAME))
643 break;
644 }
645 if (!*pattern)
646 return 0;
647 }
648
649 /* We do not open the object yet; sort may only need refname
650 * to do its job and the resulting list may yet to be pruned
651 * by maxcount logic.
652 */
653 ref = xcalloc(1, sizeof(*ref));
654 ref->refname = xstrdup(refname);
655 hashcpy(ref->objectname, sha1);
656
657 cnt = cb->grab_cnt;
658 cb->grab_array = xrealloc(cb->grab_array,
659 sizeof(*cb->grab_array) * (cnt + 1));
660 cb->grab_array[cnt++] = ref;
661 cb->grab_cnt = cnt;
662 return 0;
663 }
664
665 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
666 {
667 struct atom_value *va, *vb;
668 int cmp;
669 cmp_type cmp_type = used_atom_type[s->atom];
670
671 get_value(a, s->atom, &va);
672 get_value(b, s->atom, &vb);
673 switch (cmp_type) {
674 case FIELD_STR:
675 cmp = strcmp(va->s, vb->s);
676 break;
677 default:
678 if (va->ul < vb->ul)
679 cmp = -1;
680 else if (va->ul == vb->ul)
681 cmp = 0;
682 else
683 cmp = 1;
684 break;
685 }
686 return (s->reverse) ? -cmp : cmp;
687 }
688
689 static struct ref_sort *ref_sort;
690 static int compare_refs(const void *a_, const void *b_)
691 {
692 struct refinfo *a = *((struct refinfo **)a_);
693 struct refinfo *b = *((struct refinfo **)b_);
694 struct ref_sort *s;
695
696 for (s = ref_sort; s; s = s->next) {
697 int cmp = cmp_ref_sort(s, a, b);
698 if (cmp)
699 return cmp;
700 }
701 return 0;
702 }
703
704 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
705 {
706 ref_sort = sort;
707 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
708 }
709
710 static void print_value(struct refinfo *ref, int atom, int quote_style)
711 {
712 struct atom_value *v;
713 get_value(ref, atom, &v);
714 switch (quote_style) {
715 case QUOTE_NONE:
716 fputs(v->s, stdout);
717 break;
718 case QUOTE_SHELL:
719 sq_quote_print(stdout, v->s);
720 break;
721 case QUOTE_PERL:
722 perl_quote_print(stdout, v->s);
723 break;
724 case QUOTE_PYTHON:
725 python_quote_print(stdout, v->s);
726 break;
727 case QUOTE_TCL:
728 tcl_quote_print(stdout, v->s);
729 break;
730 }
731 }
732
733 static int hex1(char ch)
734 {
735 if ('0' <= ch && ch <= '9')
736 return ch - '0';
737 else if ('a' <= ch && ch <= 'f')
738 return ch - 'a' + 10;
739 else if ('A' <= ch && ch <= 'F')
740 return ch - 'A' + 10;
741 return -1;
742 }
743 static int hex2(const char *cp)
744 {
745 if (cp[0] && cp[1])
746 return (hex1(cp[0]) << 4) | hex1(cp[1]);
747 else
748 return -1;
749 }
750
751 static void emit(const char *cp, const char *ep)
752 {
753 while (*cp && (!ep || cp < ep)) {
754 if (*cp == '%') {
755 if (cp[1] == '%')
756 cp++;
757 else {
758 int ch = hex2(cp + 1);
759 if (0 <= ch) {
760 putchar(ch);
761 cp += 3;
762 continue;
763 }
764 }
765 }
766 putchar(*cp);
767 cp++;
768 }
769 }
770
771 static void show_ref(struct refinfo *info, const char *format, int quote_style)
772 {
773 const char *cp, *sp, *ep;
774
775 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
776 ep = strchr(sp, ')');
777 if (cp < sp)
778 emit(cp, sp);
779 print_value(info, parse_atom(sp + 2, ep), quote_style);
780 }
781 if (*cp) {
782 sp = cp + strlen(cp);
783 emit(cp, sp);
784 }
785 putchar('\n');
786 }
787
788 static struct ref_sort *default_sort(void)
789 {
790 static const char cstr_name[] = "refname";
791
792 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
793
794 sort->next = NULL;
795 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
796 return sort;
797 }
798
799 int cmd_for_each_ref(int ac, const char **av, char *prefix)
800 {
801 int i, num_refs;
802 const char *format = NULL;
803 struct ref_sort *sort = NULL, **sort_tail = &sort;
804 int maxcount = 0;
805 int quote_style = -1; /* unspecified yet */
806 struct refinfo **refs;
807 struct grab_ref_cbdata cbdata;
808
809 for (i = 1; i < ac; i++) {
810 const char *arg = av[i];
811 if (arg[0] != '-')
812 break;
813 if (!strcmp(arg, "--")) {
814 i++;
815 break;
816 }
817 if (!prefixcmp(arg, "--format=")) {
818 if (format)
819 die("more than one --format?");
820 format = arg + 9;
821 continue;
822 }
823 if (!strcmp(arg, "-s") || !strcmp(arg, "--shell") ) {
824 if (0 <= quote_style)
825 die("more than one quoting style?");
826 quote_style = QUOTE_SHELL;
827 continue;
828 }
829 if (!strcmp(arg, "-p") || !strcmp(arg, "--perl") ) {
830 if (0 <= quote_style)
831 die("more than one quoting style?");
832 quote_style = QUOTE_PERL;
833 continue;
834 }
835 if (!strcmp(arg, "--python") ) {
836 if (0 <= quote_style)
837 die("more than one quoting style?");
838 quote_style = QUOTE_PYTHON;
839 continue;
840 }
841 if (!strcmp(arg, "--tcl") ) {
842 if (0 <= quote_style)
843 die("more than one quoting style?");
844 quote_style = QUOTE_TCL;
845 continue;
846 }
847 if (!prefixcmp(arg, "--count=")) {
848 if (maxcount)
849 die("more than one --count?");
850 maxcount = atoi(arg + 8);
851 if (maxcount <= 0)
852 die("The number %s did not parse", arg);
853 continue;
854 }
855 if (!prefixcmp(arg, "--sort=")) {
856 struct ref_sort *s = xcalloc(1, sizeof(*s));
857 int len;
858
859 s->next = NULL;
860 *sort_tail = s;
861 sort_tail = &s->next;
862
863 arg += 7;
864 if (*arg == '-') {
865 s->reverse = 1;
866 arg++;
867 }
868 len = strlen(arg);
869 sort->atom = parse_atom(arg, arg+len);
870 continue;
871 }
872 break;
873 }
874 if (quote_style < 0)
875 quote_style = QUOTE_NONE;
876
877 if (!sort)
878 sort = default_sort();
879 sort_atom_limit = used_atom_cnt;
880 if (!format)
881 format = "%(objectname) %(objecttype)\t%(refname)";
882
883 verify_format(format);
884
885 memset(&cbdata, 0, sizeof(cbdata));
886 cbdata.grab_pattern = av + i;
887 for_each_ref(grab_single_ref, &cbdata);
888 refs = cbdata.grab_array;
889 num_refs = cbdata.grab_cnt;
890
891 for (i = 0; i < used_atom_cnt; i++) {
892 if (used_atom[i][0] == '*') {
893 need_tagged = 1;
894 break;
895 }
896 }
897
898 sort_refs(sort, refs, num_refs);
899
900 if (!maxcount || num_refs < maxcount)
901 maxcount = num_refs;
902 for (i = 0; i < maxcount; i++)
903 show_ref(refs[i], format, quote_style);
904 return 0;
905 }
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