gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / builtin / for-each-ref.c
blob62be1bbfd6659f9dfac73a17acd1e2d5322dac66
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 #include "remote.h"
13 /* Quoting styles */
14 #define QUOTE_NONE 0
15 #define QUOTE_SHELL 1
16 #define QUOTE_PERL 2
17 #define QUOTE_PYTHON 4
18 #define QUOTE_TCL 8
20 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
22 struct atom_value {
23 const char *s;
24 unsigned long ul; /* used for sorting when not FIELD_STR */
27 struct ref_sort {
28 struct ref_sort *next;
29 int atom; /* index into used_atom array */
30 unsigned reverse : 1;
33 struct refinfo {
34 char *refname;
35 unsigned char objectname[20];
36 int flag;
37 const char *symref;
38 struct atom_value *value;
41 static struct {
42 const char *name;
43 cmp_type cmp_type;
44 } valid_atom[] = {
45 { "refname" },
46 { "objecttype" },
47 { "objectsize", FIELD_ULONG },
48 { "objectname" },
49 { "tree" },
50 { "parent" },
51 { "numparent", FIELD_ULONG },
52 { "object" },
53 { "type" },
54 { "tag" },
55 { "author" },
56 { "authorname" },
57 { "authoremail" },
58 { "authordate", FIELD_TIME },
59 { "committer" },
60 { "committername" },
61 { "committeremail" },
62 { "committerdate", FIELD_TIME },
63 { "tagger" },
64 { "taggername" },
65 { "taggeremail" },
66 { "taggerdate", FIELD_TIME },
67 { "creator" },
68 { "creatordate", FIELD_TIME },
69 { "subject" },
70 { "body" },
71 { "contents" },
72 { "upstream" },
73 { "symref" },
74 { "flag" },
78 * An atom is a valid field atom listed above, possibly prefixed with
79 * a "*" to denote deref_tag().
81 * We parse given format string and sort specifiers, and make a list
82 * of properties that we need to extract out of objects. refinfo
83 * structure will hold an array of values extracted that can be
84 * indexed with the "atom number", which is an index into this
85 * array.
87 static const char **used_atom;
88 static cmp_type *used_atom_type;
89 static int used_atom_cnt, sort_atom_limit, need_tagged, need_symref;
92 * Used to parse format string and sort specifiers
94 static int parse_atom(const char *atom, const char *ep)
96 const char *sp;
97 int i, at;
99 sp = atom;
100 if (*sp == '*' && sp < ep)
101 sp++; /* deref */
102 if (ep <= sp)
103 die("malformed field name: %.*s", (int)(ep-atom), atom);
105 /* Do we have the atom already used elsewhere? */
106 for (i = 0; i < used_atom_cnt; i++) {
107 int len = strlen(used_atom[i]);
108 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
109 return i;
112 /* Is the atom a valid one? */
113 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
114 int len = strlen(valid_atom[i].name);
116 * If the atom name has a colon, strip it and everything after
117 * it off - it specifies the format for this entry, and
118 * shouldn't be used for checking against the valid_atom
119 * table.
121 const char *formatp = strchr(sp, ':');
122 if (!formatp || ep < formatp)
123 formatp = ep;
124 if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
125 break;
128 if (ARRAY_SIZE(valid_atom) <= i)
129 die("unknown field name: %.*s", (int)(ep-atom), atom);
131 /* Add it in, including the deref prefix */
132 at = used_atom_cnt;
133 used_atom_cnt++;
134 used_atom = xrealloc(used_atom,
135 (sizeof *used_atom) * used_atom_cnt);
136 used_atom_type = xrealloc(used_atom_type,
137 (sizeof(*used_atom_type) * used_atom_cnt));
138 used_atom[at] = xmemdupz(atom, ep - atom);
139 used_atom_type[at] = valid_atom[i].cmp_type;
140 if (*atom == '*')
141 need_tagged = 1;
142 if (!strcmp(used_atom[at], "symref"))
143 need_symref = 1;
144 return at;
148 * In a format string, find the next occurrence of %(atom).
150 static const char *find_next(const char *cp)
152 while (*cp) {
153 if (*cp == '%') {
155 * %( is the start of an atom;
156 * %% is a quoted per-cent.
158 if (cp[1] == '(')
159 return cp;
160 else if (cp[1] == '%')
161 cp++; /* skip over two % */
162 /* otherwise this is a singleton, literal % */
164 cp++;
166 return NULL;
170 * Make sure the format string is well formed, and parse out
171 * the used atoms.
173 static int verify_format(const char *format)
175 const char *cp, *sp;
176 for (cp = format; *cp && (sp = find_next(cp)); ) {
177 const char *ep = strchr(sp, ')');
178 if (!ep)
179 return error("malformed format string %s", sp);
180 /* sp points at "%(" and ep points at the closing ")" */
181 parse_atom(sp + 2, ep);
182 cp = ep + 1;
184 return 0;
188 * Given an object name, read the object data and size, and return a
189 * "struct object". If the object data we are returning is also borrowed
190 * by the "struct object" representation, set *eaten as well---it is a
191 * signal from parse_object_buffer to us not to free the buffer.
193 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
195 enum object_type type;
196 void *buf = read_sha1_file(sha1, &type, sz);
198 if (buf)
199 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
200 else
201 *obj = NULL;
202 return buf;
205 /* See grab_values */
206 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
208 int i;
210 for (i = 0; i < used_atom_cnt; i++) {
211 const char *name = used_atom[i];
212 struct atom_value *v = &val[i];
213 if (!!deref != (*name == '*'))
214 continue;
215 if (deref)
216 name++;
217 if (!strcmp(name, "objecttype"))
218 v->s = typename(obj->type);
219 else if (!strcmp(name, "objectsize")) {
220 char *s = xmalloc(40);
221 sprintf(s, "%lu", sz);
222 v->ul = sz;
223 v->s = s;
225 else if (!strcmp(name, "objectname")) {
226 char *s = xmalloc(41);
227 strcpy(s, sha1_to_hex(obj->sha1));
228 v->s = s;
233 /* See grab_values */
234 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
236 int i;
237 struct tag *tag = (struct tag *) obj;
239 for (i = 0; i < used_atom_cnt; i++) {
240 const char *name = used_atom[i];
241 struct atom_value *v = &val[i];
242 if (!!deref != (*name == '*'))
243 continue;
244 if (deref)
245 name++;
246 if (!strcmp(name, "tag"))
247 v->s = tag->tag;
248 else if (!strcmp(name, "type") && tag->tagged)
249 v->s = typename(tag->tagged->type);
250 else if (!strcmp(name, "object") && tag->tagged) {
251 char *s = xmalloc(41);
252 strcpy(s, sha1_to_hex(tag->tagged->sha1));
253 v->s = s;
258 static int num_parents(struct commit *commit)
260 struct commit_list *parents;
261 int i;
263 for (i = 0, parents = commit->parents;
264 parents;
265 parents = parents->next)
266 i++;
267 return i;
270 /* See grab_values */
271 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
273 int i;
274 struct commit *commit = (struct commit *) obj;
276 for (i = 0; i < used_atom_cnt; i++) {
277 const char *name = used_atom[i];
278 struct atom_value *v = &val[i];
279 if (!!deref != (*name == '*'))
280 continue;
281 if (deref)
282 name++;
283 if (!strcmp(name, "tree")) {
284 char *s = xmalloc(41);
285 strcpy(s, sha1_to_hex(commit->tree->object.sha1));
286 v->s = s;
288 if (!strcmp(name, "numparent")) {
289 char *s = xmalloc(40);
290 v->ul = num_parents(commit);
291 sprintf(s, "%lu", v->ul);
292 v->s = s;
294 else if (!strcmp(name, "parent")) {
295 int num = num_parents(commit);
296 int i;
297 struct commit_list *parents;
298 char *s = xmalloc(41 * num + 1);
299 v->s = s;
300 for (i = 0, parents = commit->parents;
301 parents;
302 parents = parents->next, i = i + 41) {
303 struct commit *parent = parents->item;
304 strcpy(s+i, sha1_to_hex(parent->object.sha1));
305 if (parents->next)
306 s[i+40] = ' ';
308 if (!i)
309 *s = '\0';
314 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
316 const char *eol;
317 while (*buf) {
318 if (!strncmp(buf, who, wholen) &&
319 buf[wholen] == ' ')
320 return buf + wholen + 1;
321 eol = strchr(buf, '\n');
322 if (!eol)
323 return "";
324 eol++;
325 if (*eol == '\n')
326 return ""; /* end of header */
327 buf = eol;
329 return "";
332 static const char *copy_line(const char *buf)
334 const char *eol = strchrnul(buf, '\n');
335 return xmemdupz(buf, eol - buf);
338 static const char *copy_name(const char *buf)
340 const char *cp;
341 for (cp = buf; *cp && *cp != '\n'; cp++) {
342 if (!strncmp(cp, " <", 2))
343 return xmemdupz(buf, cp - buf);
345 return "";
348 static const char *copy_email(const char *buf)
350 const char *email = strchr(buf, '<');
351 const char *eoemail;
352 if (!email)
353 return "";
354 eoemail = strchr(email, '>');
355 if (!eoemail)
356 return "";
357 return xmemdupz(email, eoemail + 1 - email);
360 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
362 const char *eoemail = strstr(buf, "> ");
363 char *zone;
364 unsigned long timestamp;
365 long tz;
366 enum date_mode date_mode = DATE_NORMAL;
367 const char *formatp;
370 * We got here because atomname ends in "date" or "date<something>";
371 * it's not possible that <something> is not ":<format>" because
372 * parse_atom() wouldn't have allowed it, so we can assume that no
373 * ":" means no format is specified, and use the default.
375 formatp = strchr(atomname, ':');
376 if (formatp != NULL) {
377 formatp++;
378 date_mode = parse_date_format(formatp);
381 if (!eoemail)
382 goto bad;
383 timestamp = strtoul(eoemail + 2, &zone, 10);
384 if (timestamp == ULONG_MAX)
385 goto bad;
386 tz = strtol(zone, NULL, 10);
387 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
388 goto bad;
389 v->s = xstrdup(show_date(timestamp, tz, date_mode));
390 v->ul = timestamp;
391 return;
392 bad:
393 v->s = "";
394 v->ul = 0;
397 /* See grab_values */
398 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
400 int i;
401 int wholen = strlen(who);
402 const char *wholine = NULL;
404 for (i = 0; i < used_atom_cnt; i++) {
405 const char *name = used_atom[i];
406 struct atom_value *v = &val[i];
407 if (!!deref != (*name == '*'))
408 continue;
409 if (deref)
410 name++;
411 if (strncmp(who, name, wholen))
412 continue;
413 if (name[wholen] != 0 &&
414 strcmp(name + wholen, "name") &&
415 strcmp(name + wholen, "email") &&
416 prefixcmp(name + wholen, "date"))
417 continue;
418 if (!wholine)
419 wholine = find_wholine(who, wholen, buf, sz);
420 if (!wholine)
421 return; /* no point looking for it */
422 if (name[wholen] == 0)
423 v->s = copy_line(wholine);
424 else if (!strcmp(name + wholen, "name"))
425 v->s = copy_name(wholine);
426 else if (!strcmp(name + wholen, "email"))
427 v->s = copy_email(wholine);
428 else if (!prefixcmp(name + wholen, "date"))
429 grab_date(wholine, v, name);
433 * For a tag or a commit object, if "creator" or "creatordate" is
434 * requested, do something special.
436 if (strcmp(who, "tagger") && strcmp(who, "committer"))
437 return; /* "author" for commit object is not wanted */
438 if (!wholine)
439 wholine = find_wholine(who, wholen, buf, sz);
440 if (!wholine)
441 return;
442 for (i = 0; i < used_atom_cnt; i++) {
443 const char *name = used_atom[i];
444 struct atom_value *v = &val[i];
445 if (!!deref != (*name == '*'))
446 continue;
447 if (deref)
448 name++;
450 if (!prefixcmp(name, "creatordate"))
451 grab_date(wholine, v, name);
452 else if (!strcmp(name, "creator"))
453 v->s = copy_line(wholine);
457 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
459 while (*buf) {
460 const char *eol = strchr(buf, '\n');
461 if (!eol)
462 return;
463 if (eol[1] == '\n') {
464 buf = eol + 1;
465 break; /* found end of header */
467 buf = eol + 1;
469 while (*buf == '\n')
470 buf++;
471 if (!*buf)
472 return;
473 *sub = buf; /* first non-empty line */
474 buf = strchr(buf, '\n');
475 if (!buf) {
476 *body = "";
477 return; /* no body */
479 while (*buf == '\n')
480 buf++; /* skip blank between subject and body */
481 *body = buf;
484 /* See grab_values */
485 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
487 int i;
488 const char *subpos = NULL, *bodypos = NULL;
490 for (i = 0; i < used_atom_cnt; i++) {
491 const char *name = used_atom[i];
492 struct atom_value *v = &val[i];
493 if (!!deref != (*name == '*'))
494 continue;
495 if (deref)
496 name++;
497 if (strcmp(name, "subject") &&
498 strcmp(name, "body") &&
499 strcmp(name, "contents"))
500 continue;
501 if (!subpos)
502 find_subpos(buf, sz, &subpos, &bodypos);
503 if (!subpos)
504 return;
506 if (!strcmp(name, "subject"))
507 v->s = copy_line(subpos);
508 else if (!strcmp(name, "body"))
509 v->s = xstrdup(bodypos);
510 else if (!strcmp(name, "contents"))
511 v->s = xstrdup(subpos);
516 * We want to have empty print-string for field requests
517 * that do not apply (e.g. "authordate" for a tag object)
519 static void fill_missing_values(struct atom_value *val)
521 int i;
522 for (i = 0; i < used_atom_cnt; i++) {
523 struct atom_value *v = &val[i];
524 if (v->s == NULL)
525 v->s = "";
530 * val is a list of atom_value to hold returned values. Extract
531 * the values for atoms in used_atom array out of (obj, buf, sz).
532 * when deref is false, (obj, buf, sz) is the object that is
533 * pointed at by the ref itself; otherwise it is the object the
534 * ref (which is a tag) refers to.
536 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
538 grab_common_values(val, deref, obj, buf, sz);
539 switch (obj->type) {
540 case OBJ_TAG:
541 grab_tag_values(val, deref, obj, buf, sz);
542 grab_sub_body_contents(val, deref, obj, buf, sz);
543 grab_person("tagger", val, deref, obj, buf, sz);
544 break;
545 case OBJ_COMMIT:
546 grab_commit_values(val, deref, obj, buf, sz);
547 grab_sub_body_contents(val, deref, obj, buf, sz);
548 grab_person("author", val, deref, obj, buf, sz);
549 grab_person("committer", val, deref, obj, buf, sz);
550 break;
551 case OBJ_TREE:
552 // grab_tree_values(val, deref, obj, buf, sz);
553 break;
554 case OBJ_BLOB:
555 // grab_blob_values(val, deref, obj, buf, sz);
556 break;
557 default:
558 die("Eh? Object of type %d?", obj->type);
562 static inline char *copy_advance(char *dst, const char *src)
564 while (*src)
565 *dst++ = *src++;
566 return dst;
570 * Parse the object referred by ref, and grab needed value.
572 static void populate_value(struct refinfo *ref)
574 void *buf;
575 struct object *obj;
576 int eaten, i;
577 unsigned long size;
578 const unsigned char *tagged;
580 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
582 if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
583 unsigned char unused1[20];
584 const char *symref;
585 symref = resolve_ref(ref->refname, unused1, 1, NULL);
586 if (symref)
587 ref->symref = xstrdup(symref);
588 else
589 ref->symref = "";
592 /* Fill in specials first */
593 for (i = 0; i < used_atom_cnt; i++) {
594 const char *name = used_atom[i];
595 struct atom_value *v = &ref->value[i];
596 int deref = 0;
597 const char *refname;
598 const char *formatp;
600 if (*name == '*') {
601 deref = 1;
602 name++;
605 if (!prefixcmp(name, "refname"))
606 refname = ref->refname;
607 else if (!prefixcmp(name, "symref"))
608 refname = ref->symref ? ref->symref : "";
609 else if (!prefixcmp(name, "upstream")) {
610 struct branch *branch;
611 /* only local branches may have an upstream */
612 if (prefixcmp(ref->refname, "refs/heads/"))
613 continue;
614 branch = branch_get(ref->refname + 11);
616 if (!branch || !branch->merge || !branch->merge[0] ||
617 !branch->merge[0]->dst)
618 continue;
619 refname = branch->merge[0]->dst;
621 else if (!strcmp(name, "flag")) {
622 char buf[256], *cp = buf;
623 if (ref->flag & REF_ISSYMREF)
624 cp = copy_advance(cp, ",symref");
625 if (ref->flag & REF_ISPACKED)
626 cp = copy_advance(cp, ",packed");
627 if (cp == buf)
628 v->s = "";
629 else {
630 *cp = '\0';
631 v->s = xstrdup(buf + 1);
633 continue;
635 else
636 continue;
638 formatp = strchr(name, ':');
639 /* look for "short" refname format */
640 if (formatp) {
641 formatp++;
642 if (!strcmp(formatp, "short"))
643 refname = shorten_unambiguous_ref(refname,
644 warn_ambiguous_refs);
645 else
646 die("unknown %.*s format %s",
647 (int)(formatp - name), name, formatp);
650 if (!deref)
651 v->s = refname;
652 else {
653 int len = strlen(refname);
654 char *s = xmalloc(len + 4);
655 sprintf(s, "%s^{}", refname);
656 v->s = s;
660 for (i = 0; i < used_atom_cnt; i++) {
661 struct atom_value *v = &ref->value[i];
662 if (v->s == NULL)
663 goto need_obj;
665 return;
667 need_obj:
668 buf = get_obj(ref->objectname, &obj, &size, &eaten);
669 if (!buf)
670 die("missing object %s for %s",
671 sha1_to_hex(ref->objectname), ref->refname);
672 if (!obj)
673 die("parse_object_buffer failed on %s for %s",
674 sha1_to_hex(ref->objectname), ref->refname);
676 grab_values(ref->value, 0, obj, buf, size);
677 if (!eaten)
678 free(buf);
681 * If there is no atom that wants to know about tagged
682 * object, we are done.
684 if (!need_tagged || (obj->type != OBJ_TAG))
685 return;
688 * If it is a tag object, see if we use a value that derefs
689 * the object, and if we do grab the object it refers to.
691 tagged = ((struct tag *)obj)->tagged->sha1;
694 * NEEDSWORK: This derefs tag only once, which
695 * is good to deal with chains of trust, but
696 * is not consistent with what deref_tag() does
697 * which peels the onion to the core.
699 buf = get_obj(tagged, &obj, &size, &eaten);
700 if (!buf)
701 die("missing object %s for %s",
702 sha1_to_hex(tagged), ref->refname);
703 if (!obj)
704 die("parse_object_buffer failed on %s for %s",
705 sha1_to_hex(tagged), ref->refname);
706 grab_values(ref->value, 1, obj, buf, size);
707 if (!eaten)
708 free(buf);
712 * Given a ref, return the value for the atom. This lazily gets value
713 * out of the object by calling populate value.
715 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
717 if (!ref->value) {
718 populate_value(ref);
719 fill_missing_values(ref->value);
721 *v = &ref->value[atom];
724 struct grab_ref_cbdata {
725 struct refinfo **grab_array;
726 const char **grab_pattern;
727 int grab_cnt;
731 * A call-back given to for_each_ref(). Filter refs and keep them for
732 * later object processing.
734 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
736 struct grab_ref_cbdata *cb = cb_data;
737 struct refinfo *ref;
738 int cnt;
740 if (*cb->grab_pattern) {
741 const char **pattern;
742 int namelen = strlen(refname);
743 for (pattern = cb->grab_pattern; *pattern; pattern++) {
744 const char *p = *pattern;
745 int plen = strlen(p);
747 if ((plen <= namelen) &&
748 !strncmp(refname, p, plen) &&
749 (refname[plen] == '\0' ||
750 refname[plen] == '/' ||
751 p[plen-1] == '/'))
752 break;
753 if (!fnmatch(p, refname, FNM_PATHNAME))
754 break;
756 if (!*pattern)
757 return 0;
761 * We do not open the object yet; sort may only need refname
762 * to do its job and the resulting list may yet to be pruned
763 * by maxcount logic.
765 ref = xcalloc(1, sizeof(*ref));
766 ref->refname = xstrdup(refname);
767 hashcpy(ref->objectname, sha1);
768 ref->flag = flag;
770 cnt = cb->grab_cnt;
771 cb->grab_array = xrealloc(cb->grab_array,
772 sizeof(*cb->grab_array) * (cnt + 1));
773 cb->grab_array[cnt++] = ref;
774 cb->grab_cnt = cnt;
775 return 0;
778 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
780 struct atom_value *va, *vb;
781 int cmp;
782 cmp_type cmp_type = used_atom_type[s->atom];
784 get_value(a, s->atom, &va);
785 get_value(b, s->atom, &vb);
786 switch (cmp_type) {
787 case FIELD_STR:
788 cmp = strcmp(va->s, vb->s);
789 break;
790 default:
791 if (va->ul < vb->ul)
792 cmp = -1;
793 else if (va->ul == vb->ul)
794 cmp = 0;
795 else
796 cmp = 1;
797 break;
799 return (s->reverse) ? -cmp : cmp;
802 static struct ref_sort *ref_sort;
803 static int compare_refs(const void *a_, const void *b_)
805 struct refinfo *a = *((struct refinfo **)a_);
806 struct refinfo *b = *((struct refinfo **)b_);
807 struct ref_sort *s;
809 for (s = ref_sort; s; s = s->next) {
810 int cmp = cmp_ref_sort(s, a, b);
811 if (cmp)
812 return cmp;
814 return 0;
817 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
819 ref_sort = sort;
820 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
823 static void print_value(struct refinfo *ref, int atom, int quote_style)
825 struct atom_value *v;
826 get_value(ref, atom, &v);
827 switch (quote_style) {
828 case QUOTE_NONE:
829 fputs(v->s, stdout);
830 break;
831 case QUOTE_SHELL:
832 sq_quote_print(stdout, v->s);
833 break;
834 case QUOTE_PERL:
835 perl_quote_print(stdout, v->s);
836 break;
837 case QUOTE_PYTHON:
838 python_quote_print(stdout, v->s);
839 break;
840 case QUOTE_TCL:
841 tcl_quote_print(stdout, v->s);
842 break;
846 static int hex1(char ch)
848 if ('0' <= ch && ch <= '9')
849 return ch - '0';
850 else if ('a' <= ch && ch <= 'f')
851 return ch - 'a' + 10;
852 else if ('A' <= ch && ch <= 'F')
853 return ch - 'A' + 10;
854 return -1;
856 static int hex2(const char *cp)
858 if (cp[0] && cp[1])
859 return (hex1(cp[0]) << 4) | hex1(cp[1]);
860 else
861 return -1;
864 static void emit(const char *cp, const char *ep)
866 while (*cp && (!ep || cp < ep)) {
867 if (*cp == '%') {
868 if (cp[1] == '%')
869 cp++;
870 else {
871 int ch = hex2(cp + 1);
872 if (0 <= ch) {
873 putchar(ch);
874 cp += 3;
875 continue;
879 putchar(*cp);
880 cp++;
884 static void show_ref(struct refinfo *info, const char *format, int quote_style)
886 const char *cp, *sp, *ep;
888 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
889 ep = strchr(sp, ')');
890 if (cp < sp)
891 emit(cp, sp);
892 print_value(info, parse_atom(sp + 2, ep), quote_style);
894 if (*cp) {
895 sp = cp + strlen(cp);
896 emit(cp, sp);
898 putchar('\n');
901 static struct ref_sort *default_sort(void)
903 static const char cstr_name[] = "refname";
905 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
907 sort->next = NULL;
908 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
909 return sort;
912 static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
914 struct ref_sort **sort_tail = opt->value;
915 struct ref_sort *s;
916 int len;
918 if (!arg) /* should --no-sort void the list ? */
919 return -1;
921 *sort_tail = s = xcalloc(1, sizeof(*s));
923 if (*arg == '-') {
924 s->reverse = 1;
925 arg++;
927 len = strlen(arg);
928 s->atom = parse_atom(arg, arg+len);
929 return 0;
932 static char const * const for_each_ref_usage[] = {
933 "git for-each-ref [options] [<pattern>]",
934 NULL
937 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
939 int i, num_refs;
940 const char *format = "%(objectname) %(objecttype)\t%(refname)";
941 struct ref_sort *sort = NULL, **sort_tail = &sort;
942 int maxcount = 0, quote_style = 0;
943 struct refinfo **refs;
944 struct grab_ref_cbdata cbdata;
946 struct option opts[] = {
947 OPT_BIT('s', "shell", &quote_style,
948 "quote placeholders suitably for shells", QUOTE_SHELL),
949 OPT_BIT('p', "perl", &quote_style,
950 "quote placeholders suitably for perl", QUOTE_PERL),
951 OPT_BIT(0 , "python", &quote_style,
952 "quote placeholders suitably for python", QUOTE_PYTHON),
953 OPT_BIT(0 , "tcl", &quote_style,
954 "quote placeholders suitably for tcl", QUOTE_TCL),
956 OPT_GROUP(""),
957 OPT_INTEGER( 0 , "count", &maxcount, "show only <n> matched refs"),
958 OPT_STRING( 0 , "format", &format, "format", "format to use for the output"),
959 OPT_CALLBACK(0 , "sort", sort_tail, "key",
960 "field name to sort on", &opt_parse_sort),
961 OPT_END(),
964 parse_options(argc, argv, prefix, opts, for_each_ref_usage, 0);
965 if (maxcount < 0) {
966 error("invalid --count argument: `%d'", maxcount);
967 usage_with_options(for_each_ref_usage, opts);
969 if (HAS_MULTI_BITS(quote_style)) {
970 error("more than one quoting style?");
971 usage_with_options(for_each_ref_usage, opts);
973 if (verify_format(format))
974 usage_with_options(for_each_ref_usage, opts);
976 if (!sort)
977 sort = default_sort();
978 sort_atom_limit = used_atom_cnt;
980 /* for warn_ambiguous_refs */
981 git_config(git_default_config, NULL);
983 memset(&cbdata, 0, sizeof(cbdata));
984 cbdata.grab_pattern = argv;
985 for_each_rawref(grab_single_ref, &cbdata);
986 refs = cbdata.grab_array;
987 num_refs = cbdata.grab_cnt;
989 sort_refs(sort, refs, num_refs);
991 if (!maxcount || num_refs < maxcount)
992 maxcount = num_refs;
993 for (i = 0; i < maxcount; i++)
994 show_ref(refs[i], format, quote_style);
995 return 0;