Merge branch 'bc/master-diff-hunk-header-fix'
[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 = strchrnul(buf, '\n');
324 return xmemdupz(buf, eol - buf);
325 }
326
327 static const char *copy_name(const char *buf)
328 {
329 const char *cp;
330 for (cp = buf; *cp && *cp != '\n'; cp++) {
331 if (!strncmp(cp, " <", 2))
332 return xmemdupz(buf, cp - buf);
333 }
334 return "";
335 }
336
337 static const char *copy_email(const char *buf)
338 {
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);
344 }
345
346 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
347 {
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;
354
355 /*
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.
360 */
361 formatp = strchr(atomname, ':');
362 if (formatp != NULL) {
363 formatp++;
364 date_mode = parse_date_format(formatp);
365 }
366
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;
381 }
382
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)
385 {
386 int i;
387 int wholen = strlen(who);
388 const char *wholine = NULL;
389
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);
416 }
417
418 /* For a tag or a commit object, if "creator" or "creatordate" is
419 * requested, do something special.
420 */
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++;
434
435 if (!prefixcmp(name, "creatordate"))
436 grab_date(wholine, v, name);
437 else if (!strcmp(name, "creator"))
438 v->s = copy_line(wholine);
439 }
440 }
441
442 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
443 {
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 */
451 }
452 buf = eol + 1;
453 }
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 */
463 }
464 while (*buf == '\n')
465 buf++; /* skip blank between subject and body */
466 *body = buf;
467 }
468
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)
471 {
472 int i;
473 const char *subpos = NULL, *bodypos = NULL;
474
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;
490
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);
497 }
498 }
499
500 /* We want to have empty print-string for field requests
501 * that do not apply (e.g. "authordate" for a tag object)
502 */
503 static void fill_missing_values(struct atom_value *val)
504 {
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 = "";
510 }
511 }
512
513 /*
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.
519 */
520 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
521 {
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);
543 }
544 }
545
546 /*
547 * generate a format suitable for scanf from a ref_rev_parse_rules
548 * rule, that is replace the "%.*s" spec with a "%s" spec
549 */
550 static void gen_scanf_fmt(char *scanf_fmt, const char *rule)
551 {
552 char *spec;
553
554 spec = strstr(rule, "%.*s");
555 if (!spec || strstr(spec + 4, "%.*s"))
556 die("invalid rule in ref_rev_parse_rules: %s", rule);
557
558 /* copy all until spec */
559 strncpy(scanf_fmt, rule, spec - rule);
560 scanf_fmt[spec - rule] = '\0';
561 /* copy new spec */
562 strcat(scanf_fmt, "%s");
563 /* copy remaining rule */
564 strcat(scanf_fmt, spec + 4);
565
566 return;
567 }
568
569 /*
570 * Shorten the refname to an non-ambiguous form
571 */
572 static char *get_short_ref(struct refinfo *ref)
573 {
574 int i;
575 static char **scanf_fmts;
576 static int nr_rules;
577 char *short_name;
578
579 /* pre generate scanf formats from ref_rev_parse_rules[] */
580 if (!nr_rules) {
581 size_t total_len = 0;
582
583 /* the rule list is NULL terminated, count them first */
584 for (; ref_rev_parse_rules[nr_rules]; nr_rules++)
585 /* no +1 because strlen("%s") < strlen("%.*s") */
586 total_len += strlen(ref_rev_parse_rules[nr_rules]);
587
588 scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len);
589
590 total_len = 0;
591 for (i = 0; i < nr_rules; i++) {
592 scanf_fmts[i] = (char *)&scanf_fmts[nr_rules]
593 + total_len;
594 gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]);
595 total_len += strlen(ref_rev_parse_rules[i]);
596 }
597 }
598
599 /* bail out if there are no rules */
600 if (!nr_rules)
601 return ref->refname;
602
603 /* buffer for scanf result, at most ref->refname must fit */
604 short_name = xstrdup(ref->refname);
605
606 /* skip first rule, it will always match */
607 for (i = nr_rules - 1; i > 0 ; --i) {
608 int j;
609 int short_name_len;
610
611 if (1 != sscanf(ref->refname, scanf_fmts[i], short_name))
612 continue;
613
614 short_name_len = strlen(short_name);
615
616 /*
617 * check if the short name resolves to a valid ref,
618 * but use only rules prior to the matched one
619 */
620 for (j = 0; j < i; j++) {
621 const char *rule = ref_rev_parse_rules[j];
622 unsigned char short_objectname[20];
623
624 /*
625 * the short name is ambiguous, if it resolves
626 * (with this previous rule) to a valid ref
627 * read_ref() returns 0 on success
628 */
629 if (!read_ref(mkpath(rule, short_name_len, short_name),
630 short_objectname))
631 break;
632 }
633
634 /*
635 * short name is non-ambiguous if all previous rules
636 * haven't resolved to a valid ref
637 */
638 if (j == i)
639 return short_name;
640 }
641
642 free(short_name);
643 return ref->refname;
644 }
645
646
647 /*
648 * Parse the object referred by ref, and grab needed value.
649 */
650 static void populate_value(struct refinfo *ref)
651 {
652 void *buf;
653 struct object *obj;
654 int eaten, i;
655 unsigned long size;
656 const unsigned char *tagged;
657
658 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
659
660 buf = get_obj(ref->objectname, &obj, &size, &eaten);
661 if (!buf)
662 die("missing object %s for %s",
663 sha1_to_hex(ref->objectname), ref->refname);
664 if (!obj)
665 die("parse_object_buffer failed on %s for %s",
666 sha1_to_hex(ref->objectname), ref->refname);
667
668 /* Fill in specials first */
669 for (i = 0; i < used_atom_cnt; i++) {
670 const char *name = used_atom[i];
671 struct atom_value *v = &ref->value[i];
672 int deref = 0;
673 if (*name == '*') {
674 deref = 1;
675 name++;
676 }
677 if (!prefixcmp(name, "refname")) {
678 const char *formatp = strchr(name, ':');
679 const char *refname = ref->refname;
680
681 /* look for "short" refname format */
682 if (formatp) {
683 formatp++;
684 if (!strcmp(formatp, "short"))
685 refname = get_short_ref(ref);
686 else
687 die("unknown refname format %s",
688 formatp);
689 }
690
691 if (!deref)
692 v->s = refname;
693 else {
694 int len = strlen(refname);
695 char *s = xmalloc(len + 4);
696 sprintf(s, "%s^{}", refname);
697 v->s = s;
698 }
699 }
700 }
701
702 grab_values(ref->value, 0, obj, buf, size);
703 if (!eaten)
704 free(buf);
705
706 /* If there is no atom that wants to know about tagged
707 * object, we are done.
708 */
709 if (!need_tagged || (obj->type != OBJ_TAG))
710 return;
711
712 /* If it is a tag object, see if we use a value that derefs
713 * the object, and if we do grab the object it refers to.
714 */
715 tagged = ((struct tag *)obj)->tagged->sha1;
716
717 /* NEEDSWORK: This derefs tag only once, which
718 * is good to deal with chains of trust, but
719 * is not consistent with what deref_tag() does
720 * which peels the onion to the core.
721 */
722 buf = get_obj(tagged, &obj, &size, &eaten);
723 if (!buf)
724 die("missing object %s for %s",
725 sha1_to_hex(tagged), ref->refname);
726 if (!obj)
727 die("parse_object_buffer failed on %s for %s",
728 sha1_to_hex(tagged), ref->refname);
729 grab_values(ref->value, 1, obj, buf, size);
730 if (!eaten)
731 free(buf);
732 }
733
734 /*
735 * Given a ref, return the value for the atom. This lazily gets value
736 * out of the object by calling populate value.
737 */
738 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
739 {
740 if (!ref->value) {
741 populate_value(ref);
742 fill_missing_values(ref->value);
743 }
744 *v = &ref->value[atom];
745 }
746
747 struct grab_ref_cbdata {
748 struct refinfo **grab_array;
749 const char **grab_pattern;
750 int grab_cnt;
751 };
752
753 /*
754 * A call-back given to for_each_ref(). It is unfortunate that we
755 * need to use global variables to pass extra information to this
756 * function.
757 */
758 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
759 {
760 struct grab_ref_cbdata *cb = cb_data;
761 struct refinfo *ref;
762 int cnt;
763
764 if (*cb->grab_pattern) {
765 const char **pattern;
766 int namelen = strlen(refname);
767 for (pattern = cb->grab_pattern; *pattern; pattern++) {
768 const char *p = *pattern;
769 int plen = strlen(p);
770
771 if ((plen <= namelen) &&
772 !strncmp(refname, p, plen) &&
773 (refname[plen] == '\0' ||
774 refname[plen] == '/' ||
775 p[plen-1] == '/'))
776 break;
777 if (!fnmatch(p, refname, FNM_PATHNAME))
778 break;
779 }
780 if (!*pattern)
781 return 0;
782 }
783
784 /* We do not open the object yet; sort may only need refname
785 * to do its job and the resulting list may yet to be pruned
786 * by maxcount logic.
787 */
788 ref = xcalloc(1, sizeof(*ref));
789 ref->refname = xstrdup(refname);
790 hashcpy(ref->objectname, sha1);
791
792 cnt = cb->grab_cnt;
793 cb->grab_array = xrealloc(cb->grab_array,
794 sizeof(*cb->grab_array) * (cnt + 1));
795 cb->grab_array[cnt++] = ref;
796 cb->grab_cnt = cnt;
797 return 0;
798 }
799
800 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
801 {
802 struct atom_value *va, *vb;
803 int cmp;
804 cmp_type cmp_type = used_atom_type[s->atom];
805
806 get_value(a, s->atom, &va);
807 get_value(b, s->atom, &vb);
808 switch (cmp_type) {
809 case FIELD_STR:
810 cmp = strcmp(va->s, vb->s);
811 break;
812 default:
813 if (va->ul < vb->ul)
814 cmp = -1;
815 else if (va->ul == vb->ul)
816 cmp = 0;
817 else
818 cmp = 1;
819 break;
820 }
821 return (s->reverse) ? -cmp : cmp;
822 }
823
824 static struct ref_sort *ref_sort;
825 static int compare_refs(const void *a_, const void *b_)
826 {
827 struct refinfo *a = *((struct refinfo **)a_);
828 struct refinfo *b = *((struct refinfo **)b_);
829 struct ref_sort *s;
830
831 for (s = ref_sort; s; s = s->next) {
832 int cmp = cmp_ref_sort(s, a, b);
833 if (cmp)
834 return cmp;
835 }
836 return 0;
837 }
838
839 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
840 {
841 ref_sort = sort;
842 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
843 }
844
845 static void print_value(struct refinfo *ref, int atom, int quote_style)
846 {
847 struct atom_value *v;
848 get_value(ref, atom, &v);
849 switch (quote_style) {
850 case QUOTE_NONE:
851 fputs(v->s, stdout);
852 break;
853 case QUOTE_SHELL:
854 sq_quote_print(stdout, v->s);
855 break;
856 case QUOTE_PERL:
857 perl_quote_print(stdout, v->s);
858 break;
859 case QUOTE_PYTHON:
860 python_quote_print(stdout, v->s);
861 break;
862 case QUOTE_TCL:
863 tcl_quote_print(stdout, v->s);
864 break;
865 }
866 }
867
868 static int hex1(char ch)
869 {
870 if ('0' <= ch && ch <= '9')
871 return ch - '0';
872 else if ('a' <= ch && ch <= 'f')
873 return ch - 'a' + 10;
874 else if ('A' <= ch && ch <= 'F')
875 return ch - 'A' + 10;
876 return -1;
877 }
878 static int hex2(const char *cp)
879 {
880 if (cp[0] && cp[1])
881 return (hex1(cp[0]) << 4) | hex1(cp[1]);
882 else
883 return -1;
884 }
885
886 static void emit(const char *cp, const char *ep)
887 {
888 while (*cp && (!ep || cp < ep)) {
889 if (*cp == '%') {
890 if (cp[1] == '%')
891 cp++;
892 else {
893 int ch = hex2(cp + 1);
894 if (0 <= ch) {
895 putchar(ch);
896 cp += 3;
897 continue;
898 }
899 }
900 }
901 putchar(*cp);
902 cp++;
903 }
904 }
905
906 static void show_ref(struct refinfo *info, const char *format, int quote_style)
907 {
908 const char *cp, *sp, *ep;
909
910 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
911 ep = strchr(sp, ')');
912 if (cp < sp)
913 emit(cp, sp);
914 print_value(info, parse_atom(sp + 2, ep), quote_style);
915 }
916 if (*cp) {
917 sp = cp + strlen(cp);
918 emit(cp, sp);
919 }
920 putchar('\n');
921 }
922
923 static struct ref_sort *default_sort(void)
924 {
925 static const char cstr_name[] = "refname";
926
927 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
928
929 sort->next = NULL;
930 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
931 return sort;
932 }
933
934 static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
935 {
936 struct ref_sort **sort_tail = opt->value;
937 struct ref_sort *s;
938 int len;
939
940 if (!arg) /* should --no-sort void the list ? */
941 return -1;
942
943 *sort_tail = s = xcalloc(1, sizeof(*s));
944 sort_tail = &s->next;
945
946 if (*arg == '-') {
947 s->reverse = 1;
948 arg++;
949 }
950 len = strlen(arg);
951 s->atom = parse_atom(arg, arg+len);
952 return 0;
953 }
954
955 static char const * const for_each_ref_usage[] = {
956 "git for-each-ref [options] [<pattern>]",
957 NULL
958 };
959
960 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
961 {
962 int i, num_refs;
963 const char *format = "%(objectname) %(objecttype)\t%(refname)";
964 struct ref_sort *sort = NULL, **sort_tail = &sort;
965 int maxcount = 0, quote_style = 0;
966 struct refinfo **refs;
967 struct grab_ref_cbdata cbdata;
968
969 struct option opts[] = {
970 OPT_BIT('s', "shell", &quote_style,
971 "quote placeholders suitably for shells", QUOTE_SHELL),
972 OPT_BIT('p', "perl", &quote_style,
973 "quote placeholders suitably for perl", QUOTE_PERL),
974 OPT_BIT(0 , "python", &quote_style,
975 "quote placeholders suitably for python", QUOTE_PYTHON),
976 OPT_BIT(0 , "tcl", &quote_style,
977 "quote placeholders suitably for tcl", QUOTE_TCL),
978
979 OPT_GROUP(""),
980 OPT_INTEGER( 0 , "count", &maxcount, "show only <n> matched refs"),
981 OPT_STRING( 0 , "format", &format, "format", "format to use for the output"),
982 OPT_CALLBACK(0 , "sort", sort_tail, "key",
983 "field name to sort on", &opt_parse_sort),
984 OPT_END(),
985 };
986
987 parse_options(argc, argv, opts, for_each_ref_usage, 0);
988 if (maxcount < 0) {
989 error("invalid --count argument: `%d'", maxcount);
990 usage_with_options(for_each_ref_usage, opts);
991 }
992 if (HAS_MULTI_BITS(quote_style)) {
993 error("more than one quoting style?");
994 usage_with_options(for_each_ref_usage, opts);
995 }
996 if (verify_format(format))
997 usage_with_options(for_each_ref_usage, opts);
998
999 if (!sort)
1000 sort = default_sort();
1001 sort_atom_limit = used_atom_cnt;
1002
1003 memset(&cbdata, 0, sizeof(cbdata));
1004 cbdata.grab_pattern = argv;
1005 for_each_ref(grab_single_ref, &cbdata);
1006 refs = cbdata.grab_array;
1007 num_refs = cbdata.grab_cnt;
1008
1009 for (i = 0; i < used_atom_cnt; i++) {
1010 if (used_atom[i][0] == '*') {
1011 need_tagged = 1;
1012 break;
1013 }
1014 }
1015
1016 sort_refs(sort, refs, num_refs);
1017
1018 if (!maxcount || num_refs < maxcount)
1019 maxcount = num_refs;
1020 for (i = 0; i < maxcount; i++)
1021 show_ref(refs[i], format, quote_style);
1022 return 0;
1023 }