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Merge branch 'jk/completion-rebase' into maint
[git/debian.git] / ref-filter.c
blobf097176ed93229fe75533e21dc60e0bbc5a4e7ef
1 #include "builtin.h"
2 #include "cache.h"
3 #include "parse-options.h"
4 #include "refs.h"
5 #include "wildmatch.h"
6 #include "commit.h"
7 #include "remote.h"
8 #include "color.h"
9 #include "tag.h"
10 #include "quote.h"
11 #include "ref-filter.h"
12 #include "revision.h"
13 #include "utf8.h"
14 #include "git-compat-util.h"
15 #include "version.h"
16
17 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
18
19 static struct {
20 const char *name;
21 cmp_type cmp_type;
22 } valid_atom[] = {
23 { "refname" },
24 { "objecttype" },
25 { "objectsize", FIELD_ULONG },
26 { "objectname" },
27 { "tree" },
28 { "parent" },
29 { "numparent", FIELD_ULONG },
30 { "object" },
31 { "type" },
32 { "tag" },
33 { "author" },
34 { "authorname" },
35 { "authoremail" },
36 { "authordate", FIELD_TIME },
37 { "committer" },
38 { "committername" },
39 { "committeremail" },
40 { "committerdate", FIELD_TIME },
41 { "tagger" },
42 { "taggername" },
43 { "taggeremail" },
44 { "taggerdate", FIELD_TIME },
45 { "creator" },
46 { "creatordate", FIELD_TIME },
47 { "subject" },
48 { "body" },
49 { "contents" },
50 { "upstream" },
51 { "push" },
52 { "symref" },
53 { "flag" },
54 { "HEAD" },
55 { "color" },
56 { "align" },
57 { "end" },
58 };
59
60 #define REF_FORMATTING_STATE_INIT { 0, NULL }
61
62 struct align {
63 align_type position;
64 unsigned int width;
65 };
66
67 struct contents {
68 unsigned int lines;
69 struct object_id oid;
70 };
71
72 struct ref_formatting_stack {
73 struct ref_formatting_stack *prev;
74 struct strbuf output;
75 void (*at_end)(struct ref_formatting_stack *stack);
76 void *at_end_data;
77 };
78
79 struct ref_formatting_state {
80 int quote_style;
81 struct ref_formatting_stack *stack;
82 };
83
84 struct atom_value {
85 const char *s;
86 union {
87 struct align align;
88 struct contents contents;
89 } u;
90 void (*handler)(struct atom_value *atomv, struct ref_formatting_state *state);
91 unsigned long ul; /* used for sorting when not FIELD_STR */
92 };
93
94 /*
95 * An atom is a valid field atom listed above, possibly prefixed with
96 * a "*" to denote deref_tag().
97 *
98 * We parse given format string and sort specifiers, and make a list
99 * of properties that we need to extract out of objects. ref_array_item
100 * structure will hold an array of values extracted that can be
101 * indexed with the "atom number", which is an index into this
102 * array.
103 */
104 static const char **used_atom;
105 static cmp_type *used_atom_type;
106 static int used_atom_cnt, need_tagged, need_symref;
107 static int need_color_reset_at_eol;
108
109 /*
110 * Used to parse format string and sort specifiers
111 */
112 int parse_ref_filter_atom(const char *atom, const char *ep)
113 {
114 const char *sp;
115 int i, at;
116
117 sp = atom;
118 if (*sp == '*' && sp < ep)
119 sp++; /* deref */
120 if (ep <= sp)
121 die("malformed field name: %.*s", (int)(ep-atom), atom);
122
123 /* Do we have the atom already used elsewhere? */
124 for (i = 0; i < used_atom_cnt; i++) {
125 int len = strlen(used_atom[i]);
126 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
127 return i;
128 }
129
130 /* Is the atom a valid one? */
131 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
132 int len = strlen(valid_atom[i].name);
133 /*
134 * If the atom name has a colon, strip it and everything after
135 * it off - it specifies the format for this entry, and
136 * shouldn't be used for checking against the valid_atom
137 * table.
138 */
139 const char *formatp = strchr(sp, ':');
140 if (!formatp || ep < formatp)
141 formatp = ep;
142 if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
143 break;
144 }
145
146 if (ARRAY_SIZE(valid_atom) <= i)
147 die("unknown field name: %.*s", (int)(ep-atom), atom);
148
149 /* Add it in, including the deref prefix */
150 at = used_atom_cnt;
151 used_atom_cnt++;
152 REALLOC_ARRAY(used_atom, used_atom_cnt);
153 REALLOC_ARRAY(used_atom_type, used_atom_cnt);
154 used_atom[at] = xmemdupz(atom, ep - atom);
155 used_atom_type[at] = valid_atom[i].cmp_type;
156 if (*atom == '*')
157 need_tagged = 1;
158 if (!strcmp(used_atom[at], "symref"))
159 need_symref = 1;
160 return at;
161 }
162
163 static void quote_formatting(struct strbuf *s, const char *str, int quote_style)
164 {
165 switch (quote_style) {
166 case QUOTE_NONE:
167 strbuf_addstr(s, str);
168 break;
169 case QUOTE_SHELL:
170 sq_quote_buf(s, str);
171 break;
172 case QUOTE_PERL:
173 perl_quote_buf(s, str);
174 break;
175 case QUOTE_PYTHON:
176 python_quote_buf(s, str);
177 break;
178 case QUOTE_TCL:
179 tcl_quote_buf(s, str);
180 break;
181 }
182 }
183
184 static void append_atom(struct atom_value *v, struct ref_formatting_state *state)
185 {
186 /*
187 * Quote formatting is only done when the stack has a single
188 * element. Otherwise quote formatting is done on the
189 * element's entire output strbuf when the %(end) atom is
190 * encountered.
191 */
192 if (!state->stack->prev)
193 quote_formatting(&state->stack->output, v->s, state->quote_style);
194 else
195 strbuf_addstr(&state->stack->output, v->s);
196 }
197
198 static void push_stack_element(struct ref_formatting_stack **stack)
199 {
200 struct ref_formatting_stack *s = xcalloc(1, sizeof(struct ref_formatting_stack));
201
202 strbuf_init(&s->output, 0);
203 s->prev = *stack;
204 *stack = s;
205 }
206
207 static void pop_stack_element(struct ref_formatting_stack **stack)
208 {
209 struct ref_formatting_stack *current = *stack;
210 struct ref_formatting_stack *prev = current->prev;
211
212 if (prev)
213 strbuf_addbuf(&prev->output, &current->output);
214 strbuf_release(&current->output);
215 free(current);
216 *stack = prev;
217 }
218
219 static void end_align_handler(struct ref_formatting_stack *stack)
220 {
221 struct align *align = (struct align *)stack->at_end_data;
222 struct strbuf s = STRBUF_INIT;
223
224 strbuf_utf8_align(&s, align->position, align->width, stack->output.buf);
225 strbuf_swap(&stack->output, &s);
226 strbuf_release(&s);
227 }
228
229 static void align_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
230 {
231 struct ref_formatting_stack *new;
232
233 push_stack_element(&state->stack);
234 new = state->stack;
235 new->at_end = end_align_handler;
236 new->at_end_data = &atomv->u.align;
237 }
238
239 static void end_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
240 {
241 struct ref_formatting_stack *current = state->stack;
242 struct strbuf s = STRBUF_INIT;
243
244 if (!current->at_end)
245 die(_("format: %%(end) atom used without corresponding atom"));
246 current->at_end(current);
247
248 /*
249 * Perform quote formatting when the stack element is that of
250 * a supporting atom. If nested then perform quote formatting
251 * only on the topmost supporting atom.
252 */
253 if (!state->stack->prev->prev) {
254 quote_formatting(&s, current->output.buf, state->quote_style);
255 strbuf_swap(&current->output, &s);
256 }
257 strbuf_release(&s);
258 pop_stack_element(&state->stack);
259 }
260
261 static int match_atom_name(const char *name, const char *atom_name, const char **val)
262 {
263 const char *body;
264
265 if (!skip_prefix(name, atom_name, &body))
266 return 0; /* doesn't even begin with "atom_name" */
267 if (!body[0]) {
268 *val = NULL; /* %(atom_name) and no customization */
269 return 1;
270 }
271 if (body[0] != ':')
272 return 0; /* "atom_namefoo" is not "atom_name" or "atom_name:..." */
273 *val = body + 1; /* "atom_name:val" */
274 return 1;
275 }
276
277 /*
278 * In a format string, find the next occurrence of %(atom).
279 */
280 static const char *find_next(const char *cp)
281 {
282 while (*cp) {
283 if (*cp == '%') {
284 /*
285 * %( is the start of an atom;
286 * %% is a quoted per-cent.
287 */
288 if (cp[1] == '(')
289 return cp;
290 else if (cp[1] == '%')
291 cp++; /* skip over two % */
292 /* otherwise this is a singleton, literal % */
293 }
294 cp++;
295 }
296 return NULL;
297 }
298
299 /*
300 * Make sure the format string is well formed, and parse out
301 * the used atoms.
302 */
303 int verify_ref_format(const char *format)
304 {
305 const char *cp, *sp;
306
307 need_color_reset_at_eol = 0;
308 for (cp = format; *cp && (sp = find_next(cp)); ) {
309 const char *color, *ep = strchr(sp, ')');
310 int at;
311
312 if (!ep)
313 return error("malformed format string %s", sp);
314 /* sp points at "%(" and ep points at the closing ")" */
315 at = parse_ref_filter_atom(sp + 2, ep);
316 cp = ep + 1;
317
318 if (skip_prefix(used_atom[at], "color:", &color))
319 need_color_reset_at_eol = !!strcmp(color, "reset");
320 }
321 return 0;
322 }
323
324 /*
325 * Given an object name, read the object data and size, and return a
326 * "struct object". If the object data we are returning is also borrowed
327 * by the "struct object" representation, set *eaten as well---it is a
328 * signal from parse_object_buffer to us not to free the buffer.
329 */
330 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
331 {
332 enum object_type type;
333 void *buf = read_sha1_file(sha1, &type, sz);
334
335 if (buf)
336 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
337 else
338 *obj = NULL;
339 return buf;
340 }
341
342 static int grab_objectname(const char *name, const unsigned char *sha1,
343 struct atom_value *v)
344 {
345 if (!strcmp(name, "objectname")) {
346 v->s = xstrdup(sha1_to_hex(sha1));
347 return 1;
348 }
349 if (!strcmp(name, "objectname:short")) {
350 v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
351 return 1;
352 }
353 return 0;
354 }
355
356 /* See grab_values */
357 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
358 {
359 int i;
360
361 for (i = 0; i < used_atom_cnt; i++) {
362 const char *name = used_atom[i];
363 struct atom_value *v = &val[i];
364 if (!!deref != (*name == '*'))
365 continue;
366 if (deref)
367 name++;
368 if (!strcmp(name, "objecttype"))
369 v->s = typename(obj->type);
370 else if (!strcmp(name, "objectsize")) {
371 v->ul = sz;
372 v->s = xstrfmt("%lu", sz);
373 }
374 else if (deref)
375 grab_objectname(name, obj->oid.hash, v);
376 }
377 }
378
379 /* See grab_values */
380 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
381 {
382 int i;
383 struct tag *tag = (struct tag *) obj;
384
385 for (i = 0; i < used_atom_cnt; i++) {
386 const char *name = used_atom[i];
387 struct atom_value *v = &val[i];
388 if (!!deref != (*name == '*'))
389 continue;
390 if (deref)
391 name++;
392 if (!strcmp(name, "tag"))
393 v->s = tag->tag;
394 else if (!strcmp(name, "type") && tag->tagged)
395 v->s = typename(tag->tagged->type);
396 else if (!strcmp(name, "object") && tag->tagged)
397 v->s = xstrdup(oid_to_hex(&tag->tagged->oid));
398 }
399 }
400
401 /* See grab_values */
402 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
403 {
404 int i;
405 struct commit *commit = (struct commit *) obj;
406
407 for (i = 0; i < used_atom_cnt; i++) {
408 const char *name = used_atom[i];
409 struct atom_value *v = &val[i];
410 if (!!deref != (*name == '*'))
411 continue;
412 if (deref)
413 name++;
414 if (!strcmp(name, "tree")) {
415 v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
416 }
417 else if (!strcmp(name, "numparent")) {
418 v->ul = commit_list_count(commit->parents);
419 v->s = xstrfmt("%lu", v->ul);
420 }
421 else if (!strcmp(name, "parent")) {
422 struct commit_list *parents;
423 struct strbuf s = STRBUF_INIT;
424 for (parents = commit->parents; parents; parents = parents->next) {
425 struct commit *parent = parents->item;
426 if (parents != commit->parents)
427 strbuf_addch(&s, ' ');
428 strbuf_addstr(&s, oid_to_hex(&parent->object.oid));
429 }
430 v->s = strbuf_detach(&s, NULL);
431 }
432 }
433 }
434
435 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
436 {
437 const char *eol;
438 while (*buf) {
439 if (!strncmp(buf, who, wholen) &&
440 buf[wholen] == ' ')
441 return buf + wholen + 1;
442 eol = strchr(buf, '\n');
443 if (!eol)
444 return "";
445 eol++;
446 if (*eol == '\n')
447 return ""; /* end of header */
448 buf = eol;
449 }
450 return "";
451 }
452
453 static const char *copy_line(const char *buf)
454 {
455 const char *eol = strchrnul(buf, '\n');
456 return xmemdupz(buf, eol - buf);
457 }
458
459 static const char *copy_name(const char *buf)
460 {
461 const char *cp;
462 for (cp = buf; *cp && *cp != '\n'; cp++) {
463 if (!strncmp(cp, " <", 2))
464 return xmemdupz(buf, cp - buf);
465 }
466 return "";
467 }
468
469 static const char *copy_email(const char *buf)
470 {
471 const char *email = strchr(buf, '<');
472 const char *eoemail;
473 if (!email)
474 return "";
475 eoemail = strchr(email, '>');
476 if (!eoemail)
477 return "";
478 return xmemdupz(email, eoemail + 1 - email);
479 }
480
481 static char *copy_subject(const char *buf, unsigned long len)
482 {
483 char *r = xmemdupz(buf, len);
484 int i;
485
486 for (i = 0; i < len; i++)
487 if (r[i] == '\n')
488 r[i] = ' ';
489
490 return r;
491 }
492
493 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
494 {
495 const char *eoemail = strstr(buf, "> ");
496 char *zone;
497 unsigned long timestamp;
498 long tz;
499 struct date_mode date_mode = { DATE_NORMAL };
500 const char *formatp;
501
502 /*
503 * We got here because atomname ends in "date" or "date<something>";
504 * it's not possible that <something> is not ":<format>" because
505 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
506 * ":" means no format is specified, and use the default.
507 */
508 formatp = strchr(atomname, ':');
509 if (formatp != NULL) {
510 formatp++;
511 parse_date_format(formatp, &date_mode);
512 }
513
514 if (!eoemail)
515 goto bad;
516 timestamp = strtoul(eoemail + 2, &zone, 10);
517 if (timestamp == ULONG_MAX)
518 goto bad;
519 tz = strtol(zone, NULL, 10);
520 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
521 goto bad;
522 v->s = xstrdup(show_date(timestamp, tz, &date_mode));
523 v->ul = timestamp;
524 return;
525 bad:
526 v->s = "";
527 v->ul = 0;
528 }
529
530 /* See grab_values */
531 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
532 {
533 int i;
534 int wholen = strlen(who);
535 const char *wholine = NULL;
536
537 for (i = 0; i < used_atom_cnt; i++) {
538 const char *name = used_atom[i];
539 struct atom_value *v = &val[i];
540 if (!!deref != (*name == '*'))
541 continue;
542 if (deref)
543 name++;
544 if (strncmp(who, name, wholen))
545 continue;
546 if (name[wholen] != 0 &&
547 strcmp(name + wholen, "name") &&
548 strcmp(name + wholen, "email") &&
549 !starts_with(name + wholen, "date"))
550 continue;
551 if (!wholine)
552 wholine = find_wholine(who, wholen, buf, sz);
553 if (!wholine)
554 return; /* no point looking for it */
555 if (name[wholen] == 0)
556 v->s = copy_line(wholine);
557 else if (!strcmp(name + wholen, "name"))
558 v->s = copy_name(wholine);
559 else if (!strcmp(name + wholen, "email"))
560 v->s = copy_email(wholine);
561 else if (starts_with(name + wholen, "date"))
562 grab_date(wholine, v, name);
563 }
564
565 /*
566 * For a tag or a commit object, if "creator" or "creatordate" is
567 * requested, do something special.
568 */
569 if (strcmp(who, "tagger") && strcmp(who, "committer"))
570 return; /* "author" for commit object is not wanted */
571 if (!wholine)
572 wholine = find_wholine(who, wholen, buf, sz);
573 if (!wholine)
574 return;
575 for (i = 0; i < used_atom_cnt; i++) {
576 const char *name = used_atom[i];
577 struct atom_value *v = &val[i];
578 if (!!deref != (*name == '*'))
579 continue;
580 if (deref)
581 name++;
582
583 if (starts_with(name, "creatordate"))
584 grab_date(wholine, v, name);
585 else if (!strcmp(name, "creator"))
586 v->s = copy_line(wholine);
587 }
588 }
589
590 static void find_subpos(const char *buf, unsigned long sz,
591 const char **sub, unsigned long *sublen,
592 const char **body, unsigned long *bodylen,
593 unsigned long *nonsiglen,
594 const char **sig, unsigned long *siglen)
595 {
596 const char *eol;
597 /* skip past header until we hit empty line */
598 while (*buf && *buf != '\n') {
599 eol = strchrnul(buf, '\n');
600 if (*eol)
601 eol++;
602 buf = eol;
603 }
604 /* skip any empty lines */
605 while (*buf == '\n')
606 buf++;
607
608 /* parse signature first; we might not even have a subject line */
609 *sig = buf + parse_signature(buf, strlen(buf));
610 *siglen = strlen(*sig);
611
612 /* subject is first non-empty line */
613 *sub = buf;
614 /* subject goes to first empty line */
615 while (buf < *sig && *buf && *buf != '\n') {
616 eol = strchrnul(buf, '\n');
617 if (*eol)
618 eol++;
619 buf = eol;
620 }
621 *sublen = buf - *sub;
622 /* drop trailing newline, if present */
623 if (*sublen && (*sub)[*sublen - 1] == '\n')
624 *sublen -= 1;
625
626 /* skip any empty lines */
627 while (*buf == '\n')
628 buf++;
629 *body = buf;
630 *bodylen = strlen(buf);
631 *nonsiglen = *sig - buf;
632 }
633
634 /*
635 * If 'lines' is greater than 0, append that many lines from the given
636 * 'buf' of length 'size' to the given strbuf.
637 */
638 static void append_lines(struct strbuf *out, const char *buf, unsigned long size, int lines)
639 {
640 int i;
641 const char *sp, *eol;
642 size_t len;
643
644 sp = buf;
645
646 for (i = 0; i < lines && sp < buf + size; i++) {
647 if (i)
648 strbuf_addstr(out, "\n ");
649 eol = memchr(sp, '\n', size - (sp - buf));
650 len = eol ? eol - sp : size - (sp - buf);
651 strbuf_add(out, sp, len);
652 if (!eol)
653 break;
654 sp = eol + 1;
655 }
656 }
657
658 /* See grab_values */
659 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
660 {
661 int i;
662 const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
663 unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
664
665 for (i = 0; i < used_atom_cnt; i++) {
666 const char *name = used_atom[i];
667 struct atom_value *v = &val[i];
668 const char *valp = NULL;
669 if (!!deref != (*name == '*'))
670 continue;
671 if (deref)
672 name++;
673 if (strcmp(name, "subject") &&
674 strcmp(name, "body") &&
675 strcmp(name, "contents") &&
676 strcmp(name, "contents:subject") &&
677 strcmp(name, "contents:body") &&
678 strcmp(name, "contents:signature") &&
679 !starts_with(name, "contents:lines="))
680 continue;
681 if (!subpos)
682 find_subpos(buf, sz,
683 &subpos, &sublen,
684 &bodypos, &bodylen, &nonsiglen,
685 &sigpos, &siglen);
686
687 if (!strcmp(name, "subject"))
688 v->s = copy_subject(subpos, sublen);
689 else if (!strcmp(name, "contents:subject"))
690 v->s = copy_subject(subpos, sublen);
691 else if (!strcmp(name, "body"))
692 v->s = xmemdupz(bodypos, bodylen);
693 else if (!strcmp(name, "contents:body"))
694 v->s = xmemdupz(bodypos, nonsiglen);
695 else if (!strcmp(name, "contents:signature"))
696 v->s = xmemdupz(sigpos, siglen);
697 else if (!strcmp(name, "contents"))
698 v->s = xstrdup(subpos);
699 else if (skip_prefix(name, "contents:lines=", &valp)) {
700 struct strbuf s = STRBUF_INIT;
701 const char *contents_end = bodylen + bodypos - siglen;
702
703 if (strtoul_ui(valp, 10, &v->u.contents.lines))
704 die(_("positive value expected contents:lines=%s"), valp);
705 /* Size is the length of the message after removing the signature */
706 append_lines(&s, subpos, contents_end - subpos, v->u.contents.lines);
707 v->s = strbuf_detach(&s, NULL);
708 }
709 }
710 }
711
712 /*
713 * We want to have empty print-string for field requests
714 * that do not apply (e.g. "authordate" for a tag object)
715 */
716 static void fill_missing_values(struct atom_value *val)
717 {
718 int i;
719 for (i = 0; i < used_atom_cnt; i++) {
720 struct atom_value *v = &val[i];
721 if (v->s == NULL)
722 v->s = "";
723 }
724 }
725
726 /*
727 * val is a list of atom_value to hold returned values. Extract
728 * the values for atoms in used_atom array out of (obj, buf, sz).
729 * when deref is false, (obj, buf, sz) is the object that is
730 * pointed at by the ref itself; otherwise it is the object the
731 * ref (which is a tag) refers to.
732 */
733 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
734 {
735 grab_common_values(val, deref, obj, buf, sz);
736 switch (obj->type) {
737 case OBJ_TAG:
738 grab_tag_values(val, deref, obj, buf, sz);
739 grab_sub_body_contents(val, deref, obj, buf, sz);
740 grab_person("tagger", val, deref, obj, buf, sz);
741 break;
742 case OBJ_COMMIT:
743 grab_commit_values(val, deref, obj, buf, sz);
744 grab_sub_body_contents(val, deref, obj, buf, sz);
745 grab_person("author", val, deref, obj, buf, sz);
746 grab_person("committer", val, deref, obj, buf, sz);
747 break;
748 case OBJ_TREE:
749 /* grab_tree_values(val, deref, obj, buf, sz); */
750 break;
751 case OBJ_BLOB:
752 /* grab_blob_values(val, deref, obj, buf, sz); */
753 break;
754 default:
755 die("Eh? Object of type %d?", obj->type);
756 }
757 }
758
759 static inline char *copy_advance(char *dst, const char *src)
760 {
761 while (*src)
762 *dst++ = *src++;
763 return dst;
764 }
765
766 static const char *strip_ref_components(const char *refname, const char *nr_arg)
767 {
768 char *end;
769 long nr = strtol(nr_arg, &end, 10);
770 long remaining = nr;
771 const char *start = refname;
772
773 if (nr < 1 || *end != '\0')
774 die(":strip= requires a positive integer argument");
775
776 while (remaining) {
777 switch (*start++) {
778 case '\0':
779 die("ref '%s' does not have %ld components to :strip",
780 refname, nr);
781 case '/':
782 remaining--;
783 break;
784 }
785 }
786 return start;
787 }
788
789 /*
790 * Parse the object referred by ref, and grab needed value.
791 */
792 static void populate_value(struct ref_array_item *ref)
793 {
794 void *buf;
795 struct object *obj;
796 int eaten, i;
797 unsigned long size;
798 const unsigned char *tagged;
799
800 ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
801
802 if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
803 unsigned char unused1[20];
804 ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
805 unused1, NULL);
806 if (!ref->symref)
807 ref->symref = "";
808 }
809
810 /* Fill in specials first */
811 for (i = 0; i < used_atom_cnt; i++) {
812 const char *name = used_atom[i];
813 struct atom_value *v = &ref->value[i];
814 int deref = 0;
815 const char *refname;
816 const char *formatp;
817 const char *valp;
818 struct branch *branch = NULL;
819
820 v->handler = append_atom;
821
822 if (*name == '*') {
823 deref = 1;
824 name++;
825 }
826
827 if (starts_with(name, "refname"))
828 refname = ref->refname;
829 else if (starts_with(name, "symref"))
830 refname = ref->symref ? ref->symref : "";
831 else if (starts_with(name, "upstream")) {
832 const char *branch_name;
833 /* only local branches may have an upstream */
834 if (!skip_prefix(ref->refname, "refs/heads/",
835 &branch_name))
836 continue;
837 branch = branch_get(branch_name);
838
839 refname = branch_get_upstream(branch, NULL);
840 if (!refname)
841 continue;
842 } else if (starts_with(name, "push")) {
843 const char *branch_name;
844 if (!skip_prefix(ref->refname, "refs/heads/",
845 &branch_name))
846 continue;
847 branch = branch_get(branch_name);
848
849 refname = branch_get_push(branch, NULL);
850 if (!refname)
851 continue;
852 } else if (match_atom_name(name, "color", &valp)) {
853 char color[COLOR_MAXLEN] = "";
854
855 if (!valp)
856 die(_("expected format: %%(color:<color>)"));
857 if (color_parse(valp, color) < 0)
858 die(_("unable to parse format"));
859 v->s = xstrdup(color);
860 continue;
861 } else if (!strcmp(name, "flag")) {
862 char buf[256], *cp = buf;
863 if (ref->flag & REF_ISSYMREF)
864 cp = copy_advance(cp, ",symref");
865 if (ref->flag & REF_ISPACKED)
866 cp = copy_advance(cp, ",packed");
867 if (cp == buf)
868 v->s = "";
869 else {
870 *cp = '\0';
871 v->s = xstrdup(buf + 1);
872 }
873 continue;
874 } else if (!deref && grab_objectname(name, ref->objectname, v)) {
875 continue;
876 } else if (!strcmp(name, "HEAD")) {
877 const char *head;
878 unsigned char sha1[20];
879
880 head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
881 sha1, NULL);
882 if (!strcmp(ref->refname, head))
883 v->s = "*";
884 else
885 v->s = " ";
886 continue;
887 } else if (match_atom_name(name, "align", &valp)) {
888 struct align *align = &v->u.align;
889 struct strbuf **s, **to_free;
890 int width = -1;
891
892 if (!valp)
893 die(_("expected format: %%(align:<width>,<position>)"));
894
895 /*
896 * TODO: Implement a function similar to strbuf_split_str()
897 * which would omit the separator from the end of each value.
898 */
899 s = to_free = strbuf_split_str(valp, ',', 0);
900
901 align->position = ALIGN_LEFT;
902
903 while (*s) {
904 /* Strip trailing comma */
905 if (s[1])
906 strbuf_setlen(s[0], s[0]->len - 1);
907 if (!strtoul_ui(s[0]->buf, 10, (unsigned int *)&width))
908 ;
909 else if (!strcmp(s[0]->buf, "left"))
910 align->position = ALIGN_LEFT;
911 else if (!strcmp(s[0]->buf, "right"))
912 align->position = ALIGN_RIGHT;
913 else if (!strcmp(s[0]->buf, "middle"))
914 align->position = ALIGN_MIDDLE;
915 else
916 die(_("improper format entered align:%s"), s[0]->buf);
917 s++;
918 }
919
920 if (width < 0)
921 die(_("positive width expected with the %%(align) atom"));
922 align->width = width;
923 strbuf_list_free(to_free);
924 v->handler = align_atom_handler;
925 continue;
926 } else if (!strcmp(name, "end")) {
927 v->handler = end_atom_handler;
928 continue;
929 } else
930 continue;
931
932 formatp = strchr(name, ':');
933 if (formatp) {
934 int num_ours, num_theirs;
935 const char *arg;
936
937 formatp++;
938 if (!strcmp(formatp, "short"))
939 refname = shorten_unambiguous_ref(refname,
940 warn_ambiguous_refs);
941 else if (skip_prefix(formatp, "strip=", &arg))
942 refname = strip_ref_components(refname, arg);
943 else if (!strcmp(formatp, "track") &&
944 (starts_with(name, "upstream") ||
945 starts_with(name, "push"))) {
946
947 if (stat_tracking_info(branch, &num_ours,
948 &num_theirs, NULL))
949 continue;
950
951 if (!num_ours && !num_theirs)
952 v->s = "";
953 else if (!num_ours)
954 v->s = xstrfmt("[behind %d]", num_theirs);
955 else if (!num_theirs)
956 v->s = xstrfmt("[ahead %d]", num_ours);
957 else
958 v->s = xstrfmt("[ahead %d, behind %d]",
959 num_ours, num_theirs);
960 continue;
961 } else if (!strcmp(formatp, "trackshort") &&
962 (starts_with(name, "upstream") ||
963 starts_with(name, "push"))) {
964 assert(branch);
965
966 if (stat_tracking_info(branch, &num_ours,
967 &num_theirs, NULL))
968 continue;
969
970 if (!num_ours && !num_theirs)
971 v->s = "=";
972 else if (!num_ours)
973 v->s = "<";
974 else if (!num_theirs)
975 v->s = ">";
976 else
977 v->s = "<>";
978 continue;
979 } else
980 die("unknown %.*s format %s",
981 (int)(formatp - name), name, formatp);
982 }
983
984 if (!deref)
985 v->s = refname;
986 else
987 v->s = xstrfmt("%s^{}", refname);
988 }
989
990 for (i = 0; i < used_atom_cnt; i++) {
991 struct atom_value *v = &ref->value[i];
992 if (v->s == NULL)
993 goto need_obj;
994 }
995 return;
996
997 need_obj:
998 buf = get_obj(ref->objectname, &obj, &size, &eaten);
999 if (!buf)
1000 die("missing object %s for %s",
1001 sha1_to_hex(ref->objectname), ref->refname);
1002 if (!obj)
1003 die("parse_object_buffer failed on %s for %s",
1004 sha1_to_hex(ref->objectname), ref->refname);
1005
1006 grab_values(ref->value, 0, obj, buf, size);
1007 if (!eaten)
1008 free(buf);
1009
1010 /*
1011 * If there is no atom that wants to know about tagged
1012 * object, we are done.
1013 */
1014 if (!need_tagged || (obj->type != OBJ_TAG))
1015 return;
1016
1017 /*
1018 * If it is a tag object, see if we use a value that derefs
1019 * the object, and if we do grab the object it refers to.
1020 */
1021 tagged = ((struct tag *)obj)->tagged->oid.hash;
1022
1023 /*
1024 * NEEDSWORK: This derefs tag only once, which
1025 * is good to deal with chains of trust, but
1026 * is not consistent with what deref_tag() does
1027 * which peels the onion to the core.
1028 */
1029 buf = get_obj(tagged, &obj, &size, &eaten);
1030 if (!buf)
1031 die("missing object %s for %s",
1032 sha1_to_hex(tagged), ref->refname);
1033 if (!obj)
1034 die("parse_object_buffer failed on %s for %s",
1035 sha1_to_hex(tagged), ref->refname);
1036 grab_values(ref->value, 1, obj, buf, size);
1037 if (!eaten)
1038 free(buf);
1039 }
1040
1041 /*
1042 * Given a ref, return the value for the atom. This lazily gets value
1043 * out of the object by calling populate value.
1044 */
1045 static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
1046 {
1047 if (!ref->value) {
1048 populate_value(ref);
1049 fill_missing_values(ref->value);
1050 }
1051 *v = &ref->value[atom];
1052 }
1053
1054 enum contains_result {
1055 CONTAINS_UNKNOWN = -1,
1056 CONTAINS_NO = 0,
1057 CONTAINS_YES = 1
1058 };
1059
1060 /*
1061 * Mimicking the real stack, this stack lives on the heap, avoiding stack
1062 * overflows.
1063 *
1064 * At each recursion step, the stack items points to the commits whose
1065 * ancestors are to be inspected.
1066 */
1067 struct contains_stack {
1068 int nr, alloc;
1069 struct contains_stack_entry {
1070 struct commit *commit;
1071 struct commit_list *parents;
1072 } *contains_stack;
1073 };
1074
1075 static int in_commit_list(const struct commit_list *want, struct commit *c)
1076 {
1077 for (; want; want = want->next)
1078 if (!oidcmp(&want->item->object.oid, &c->object.oid))
1079 return 1;
1080 return 0;
1081 }
1082
1083 /*
1084 * Test whether the candidate or one of its parents is contained in the list.
1085 * Do not recurse to find out, though, but return -1 if inconclusive.
1086 */
1087 static enum contains_result contains_test(struct commit *candidate,
1088 const struct commit_list *want)
1089 {
1090 /* was it previously marked as containing a want commit? */
1091 if (candidate->object.flags & TMP_MARK)
1092 return 1;
1093 /* or marked as not possibly containing a want commit? */
1094 if (candidate->object.flags & UNINTERESTING)
1095 return 0;
1096 /* or are we it? */
1097 if (in_commit_list(want, candidate)) {
1098 candidate->object.flags |= TMP_MARK;
1099 return 1;
1100 }
1101
1102 if (parse_commit(candidate) < 0)
1103 return 0;
1104
1105 return -1;
1106 }
1107
1108 static void push_to_contains_stack(struct commit *candidate, struct contains_stack *contains_stack)
1109 {
1110 ALLOC_GROW(contains_stack->contains_stack, contains_stack->nr + 1, contains_stack->alloc);
1111 contains_stack->contains_stack[contains_stack->nr].commit = candidate;
1112 contains_stack->contains_stack[contains_stack->nr++].parents = candidate->parents;
1113 }
1114
1115 static enum contains_result contains_tag_algo(struct commit *candidate,
1116 const struct commit_list *want)
1117 {
1118 struct contains_stack contains_stack = { 0, 0, NULL };
1119 int result = contains_test(candidate, want);
1120
1121 if (result != CONTAINS_UNKNOWN)
1122 return result;
1123
1124 push_to_contains_stack(candidate, &contains_stack);
1125 while (contains_stack.nr) {
1126 struct contains_stack_entry *entry = &contains_stack.contains_stack[contains_stack.nr - 1];
1127 struct commit *commit = entry->commit;
1128 struct commit_list *parents = entry->parents;
1129
1130 if (!parents) {
1131 commit->object.flags |= UNINTERESTING;
1132 contains_stack.nr--;
1133 }
1134 /*
1135 * If we just popped the stack, parents->item has been marked,
1136 * therefore contains_test will return a meaningful 0 or 1.
1137 */
1138 else switch (contains_test(parents->item, want)) {
1139 case CONTAINS_YES:
1140 commit->object.flags |= TMP_MARK;
1141 contains_stack.nr--;
1142 break;
1143 case CONTAINS_NO:
1144 entry->parents = parents->next;
1145 break;
1146 case CONTAINS_UNKNOWN:
1147 push_to_contains_stack(parents->item, &contains_stack);
1148 break;
1149 }
1150 }
1151 free(contains_stack.contains_stack);
1152 return contains_test(candidate, want);
1153 }
1154
1155 static int commit_contains(struct ref_filter *filter, struct commit *commit)
1156 {
1157 if (filter->with_commit_tag_algo)
1158 return contains_tag_algo(commit, filter->with_commit);
1159 return is_descendant_of(commit, filter->with_commit);
1160 }
1161
1162 /*
1163 * Return 1 if the refname matches one of the patterns, otherwise 0.
1164 * A pattern can be a literal prefix (e.g. a refname "refs/heads/master"
1165 * matches a pattern "refs/heads/mas") or a wildcard (e.g. the same ref
1166 * matches "refs/heads/mas*", too).
1167 */
1168 static int match_pattern(const char **patterns, const char *refname)
1169 {
1170 /*
1171 * When no '--format' option is given we need to skip the prefix
1172 * for matching refs of tags and branches.
1173 */
1174 (void)(skip_prefix(refname, "refs/tags/", &refname) ||
1175 skip_prefix(refname, "refs/heads/", &refname) ||
1176 skip_prefix(refname, "refs/remotes/", &refname) ||
1177 skip_prefix(refname, "refs/", &refname));
1178
1179 for (; *patterns; patterns++) {
1180 if (!wildmatch(*patterns, refname, 0, NULL))
1181 return 1;
1182 }
1183 return 0;
1184 }
1185
1186 /*
1187 * Return 1 if the refname matches one of the patterns, otherwise 0.
1188 * A pattern can be path prefix (e.g. a refname "refs/heads/master"
1189 * matches a pattern "refs/heads/" but not "refs/heads/m") or a
1190 * wildcard (e.g. the same ref matches "refs/heads/m*", too).
1191 */
1192 static int match_name_as_path(const char **pattern, const char *refname)
1193 {
1194 int namelen = strlen(refname);
1195 for (; *pattern; pattern++) {
1196 const char *p = *pattern;
1197 int plen = strlen(p);
1198
1199 if ((plen <= namelen) &&
1200 !strncmp(refname, p, plen) &&
1201 (refname[plen] == '\0' ||
1202 refname[plen] == '/' ||
1203 p[plen-1] == '/'))
1204 return 1;
1205 if (!wildmatch(p, refname, WM_PATHNAME, NULL))
1206 return 1;
1207 }
1208 return 0;
1209 }
1210
1211 /* Return 1 if the refname matches one of the patterns, otherwise 0. */
1212 static int filter_pattern_match(struct ref_filter *filter, const char *refname)
1213 {
1214 if (!*filter->name_patterns)
1215 return 1; /* No pattern always matches */
1216 if (filter->match_as_path)
1217 return match_name_as_path(filter->name_patterns, refname);
1218 return match_pattern(filter->name_patterns, refname);
1219 }
1220
1221 /*
1222 * Given a ref (sha1, refname), check if the ref belongs to the array
1223 * of sha1s. If the given ref is a tag, check if the given tag points
1224 * at one of the sha1s in the given sha1 array.
1225 * the given sha1_array.
1226 * NEEDSWORK:
1227 * 1. Only a single level of inderection is obtained, we might want to
1228 * change this to account for multiple levels (e.g. annotated tags
1229 * pointing to annotated tags pointing to a commit.)
1230 * 2. As the refs are cached we might know what refname peels to without
1231 * the need to parse the object via parse_object(). peel_ref() might be a
1232 * more efficient alternative to obtain the pointee.
1233 */
1234 static const unsigned char *match_points_at(struct sha1_array *points_at,
1235 const unsigned char *sha1,
1236 const char *refname)
1237 {
1238 const unsigned char *tagged_sha1 = NULL;
1239 struct object *obj;
1240
1241 if (sha1_array_lookup(points_at, sha1) >= 0)
1242 return sha1;
1243 obj = parse_object(sha1);
1244 if (!obj)
1245 die(_("malformed object at '%s'"), refname);
1246 if (obj->type == OBJ_TAG)
1247 tagged_sha1 = ((struct tag *)obj)->tagged->oid.hash;
1248 if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
1249 return tagged_sha1;
1250 return NULL;
1251 }
1252
1253 /* Allocate space for a new ref_array_item and copy the objectname and flag to it */
1254 static struct ref_array_item *new_ref_array_item(const char *refname,
1255 const unsigned char *objectname,
1256 int flag)
1257 {
1258 size_t len = strlen(refname);
1259 struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item) + len + 1);
1260 memcpy(ref->refname, refname, len);
1261 ref->refname[len] = '\0';
1262 hashcpy(ref->objectname, objectname);
1263 ref->flag = flag;
1264
1265 return ref;
1266 }
1267
1268 static int filter_ref_kind(struct ref_filter *filter, const char *refname)
1269 {
1270 unsigned int i;
1271
1272 static struct {
1273 const char *prefix;
1274 unsigned int kind;
1275 } ref_kind[] = {
1276 { "refs/heads/" , FILTER_REFS_BRANCHES },
1277 { "refs/remotes/" , FILTER_REFS_REMOTES },
1278 { "refs/tags/", FILTER_REFS_TAGS}
1279 };
1280
1281 if (filter->kind == FILTER_REFS_BRANCHES ||
1282 filter->kind == FILTER_REFS_REMOTES ||
1283 filter->kind == FILTER_REFS_TAGS)
1284 return filter->kind;
1285 else if (!strcmp(refname, "HEAD"))
1286 return FILTER_REFS_DETACHED_HEAD;
1287
1288 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
1289 if (starts_with(refname, ref_kind[i].prefix))
1290 return ref_kind[i].kind;
1291 }
1292
1293 return FILTER_REFS_OTHERS;
1294 }
1295
1296 /*
1297 * A call-back given to for_each_ref(). Filter refs and keep them for
1298 * later object processing.
1299 */
1300 static int ref_filter_handler(const char *refname, const struct object_id *oid, int flag, void *cb_data)
1301 {
1302 struct ref_filter_cbdata *ref_cbdata = cb_data;
1303 struct ref_filter *filter = ref_cbdata->filter;
1304 struct ref_array_item *ref;
1305 struct commit *commit = NULL;
1306 unsigned int kind;
1307
1308 if (flag & REF_BAD_NAME) {
1309 warning("ignoring ref with broken name %s", refname);
1310 return 0;
1311 }
1312
1313 if (flag & REF_ISBROKEN) {
1314 warning("ignoring broken ref %s", refname);
1315 return 0;
1316 }
1317
1318 /* Obtain the current ref kind from filter_ref_kind() and ignore unwanted refs. */
1319 kind = filter_ref_kind(filter, refname);
1320 if (!(kind & filter->kind))
1321 return 0;
1322
1323 if (!filter_pattern_match(filter, refname))
1324 return 0;
1325
1326 if (filter->points_at.nr && !match_points_at(&filter->points_at, oid->hash, refname))
1327 return 0;
1328
1329 /*
1330 * A merge filter is applied on refs pointing to commits. Hence
1331 * obtain the commit using the 'oid' available and discard all
1332 * non-commits early. The actual filtering is done later.
1333 */
1334 if (filter->merge_commit || filter->with_commit || filter->verbose) {
1335 commit = lookup_commit_reference_gently(oid->hash, 1);
1336 if (!commit)
1337 return 0;
1338 /* We perform the filtering for the '--contains' option */
1339 if (filter->with_commit &&
1340 !commit_contains(filter, commit))
1341 return 0;
1342 }
1343
1344 /*
1345 * We do not open the object yet; sort may only need refname
1346 * to do its job and the resulting list may yet to be pruned
1347 * by maxcount logic.
1348 */
1349 ref = new_ref_array_item(refname, oid->hash, flag);
1350 ref->commit = commit;
1351
1352 REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
1353 ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
1354 ref->kind = kind;
1355 return 0;
1356 }
1357
1358 /* Free memory allocated for a ref_array_item */
1359 static void free_array_item(struct ref_array_item *item)
1360 {
1361 free((char *)item->symref);
1362 free(item);
1363 }
1364
1365 /* Free all memory allocated for ref_array */
1366 void ref_array_clear(struct ref_array *array)
1367 {
1368 int i;
1369
1370 for (i = 0; i < array->nr; i++)
1371 free_array_item(array->items[i]);
1372 free(array->items);
1373 array->items = NULL;
1374 array->nr = array->alloc = 0;
1375 }
1376
1377 static void do_merge_filter(struct ref_filter_cbdata *ref_cbdata)
1378 {
1379 struct rev_info revs;
1380 int i, old_nr;
1381 struct ref_filter *filter = ref_cbdata->filter;
1382 struct ref_array *array = ref_cbdata->array;
1383 struct commit **to_clear = xcalloc(sizeof(struct commit *), array->nr);
1384
1385 init_revisions(&revs, NULL);
1386
1387 for (i = 0; i < array->nr; i++) {
1388 struct ref_array_item *item = array->items[i];
1389 add_pending_object(&revs, &item->commit->object, item->refname);
1390 to_clear[i] = item->commit;
1391 }
1392
1393 filter->merge_commit->object.flags |= UNINTERESTING;
1394 add_pending_object(&revs, &filter->merge_commit->object, "");
1395
1396 revs.limited = 1;
1397 if (prepare_revision_walk(&revs))
1398 die(_("revision walk setup failed"));
1399
1400 old_nr = array->nr;
1401 array->nr = 0;
1402
1403 for (i = 0; i < old_nr; i++) {
1404 struct ref_array_item *item = array->items[i];
1405 struct commit *commit = item->commit;
1406
1407 int is_merged = !!(commit->object.flags & UNINTERESTING);
1408
1409 if (is_merged == (filter->merge == REF_FILTER_MERGED_INCLUDE))
1410 array->items[array->nr++] = array->items[i];
1411 else
1412 free_array_item(item);
1413 }
1414
1415 for (i = 0; i < old_nr; i++)
1416 clear_commit_marks(to_clear[i], ALL_REV_FLAGS);
1417 clear_commit_marks(filter->merge_commit, ALL_REV_FLAGS);
1418 free(to_clear);
1419 }
1420
1421 /*
1422 * API for filtering a set of refs. Based on the type of refs the user
1423 * has requested, we iterate through those refs and apply filters
1424 * as per the given ref_filter structure and finally store the
1425 * filtered refs in the ref_array structure.
1426 */
1427 int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int type)
1428 {
1429 struct ref_filter_cbdata ref_cbdata;
1430 int ret = 0;
1431 unsigned int broken = 0;
1432
1433 ref_cbdata.array = array;
1434 ref_cbdata.filter = filter;
1435
1436 if (type & FILTER_REFS_INCLUDE_BROKEN)
1437 broken = 1;
1438 filter->kind = type & FILTER_REFS_KIND_MASK;
1439
1440 /* Simple per-ref filtering */
1441 if (!filter->kind)
1442 die("filter_refs: invalid type");
1443 else {
1444 /*
1445 * For common cases where we need only branches or remotes or tags,
1446 * we only iterate through those refs. If a mix of refs is needed,
1447 * we iterate over all refs and filter out required refs with the help
1448 * of filter_ref_kind().
1449 */
1450 if (filter->kind == FILTER_REFS_BRANCHES)
1451 ret = for_each_fullref_in("refs/heads/", ref_filter_handler, &ref_cbdata, broken);
1452 else if (filter->kind == FILTER_REFS_REMOTES)
1453 ret = for_each_fullref_in("refs/remotes/", ref_filter_handler, &ref_cbdata, broken);
1454 else if (filter->kind == FILTER_REFS_TAGS)
1455 ret = for_each_fullref_in("refs/tags/", ref_filter_handler, &ref_cbdata, broken);
1456 else if (filter->kind & FILTER_REFS_ALL)
1457 ret = for_each_fullref_in("", ref_filter_handler, &ref_cbdata, broken);
1458 if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
1459 head_ref(ref_filter_handler, &ref_cbdata);
1460 }
1461
1462
1463 /* Filters that need revision walking */
1464 if (filter->merge_commit)
1465 do_merge_filter(&ref_cbdata);
1466
1467 return ret;
1468 }
1469
1470 static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
1471 {
1472 struct atom_value *va, *vb;
1473 int cmp;
1474 cmp_type cmp_type = used_atom_type[s->atom];
1475
1476 get_ref_atom_value(a, s->atom, &va);
1477 get_ref_atom_value(b, s->atom, &vb);
1478 if (s->version)
1479 cmp = versioncmp(va->s, vb->s);
1480 else if (cmp_type == FIELD_STR)
1481 cmp = strcmp(va->s, vb->s);
1482 else {
1483 if (va->ul < vb->ul)
1484 cmp = -1;
1485 else if (va->ul == vb->ul)
1486 cmp = strcmp(a->refname, b->refname);
1487 else
1488 cmp = 1;
1489 }
1490
1491 return (s->reverse) ? -cmp : cmp;
1492 }
1493
1494 static struct ref_sorting *ref_sorting;
1495 static int compare_refs(const void *a_, const void *b_)
1496 {
1497 struct ref_array_item *a = *((struct ref_array_item **)a_);
1498 struct ref_array_item *b = *((struct ref_array_item **)b_);
1499 struct ref_sorting *s;
1500
1501 for (s = ref_sorting; s; s = s->next) {
1502 int cmp = cmp_ref_sorting(s, a, b);
1503 if (cmp)
1504 return cmp;
1505 }
1506 return 0;
1507 }
1508
1509 void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
1510 {
1511 ref_sorting = sorting;
1512 qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
1513 }
1514
1515 static int hex1(char ch)
1516 {
1517 if ('0' <= ch && ch <= '9')
1518 return ch - '0';
1519 else if ('a' <= ch && ch <= 'f')
1520 return ch - 'a' + 10;
1521 else if ('A' <= ch && ch <= 'F')
1522 return ch - 'A' + 10;
1523 return -1;
1524 }
1525 static int hex2(const char *cp)
1526 {
1527 if (cp[0] && cp[1])
1528 return (hex1(cp[0]) << 4) | hex1(cp[1]);
1529 else
1530 return -1;
1531 }
1532
1533 static void append_literal(const char *cp, const char *ep, struct ref_formatting_state *state)
1534 {
1535 struct strbuf *s = &state->stack->output;
1536
1537 while (*cp && (!ep || cp < ep)) {
1538 if (*cp == '%') {
1539 if (cp[1] == '%')
1540 cp++;
1541 else {
1542 int ch = hex2(cp + 1);
1543 if (0 <= ch) {
1544 strbuf_addch(s, ch);
1545 cp += 3;
1546 continue;
1547 }
1548 }
1549 }
1550 strbuf_addch(s, *cp);
1551 cp++;
1552 }
1553 }
1554
1555 void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
1556 {
1557 const char *cp, *sp, *ep;
1558 struct strbuf *final_buf;
1559 struct ref_formatting_state state = REF_FORMATTING_STATE_INIT;
1560
1561 state.quote_style = quote_style;
1562 push_stack_element(&state.stack);
1563
1564 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
1565 struct atom_value *atomv;
1566
1567 ep = strchr(sp, ')');
1568 if (cp < sp)
1569 append_literal(cp, sp, &state);
1570 get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
1571 atomv->handler(atomv, &state);
1572 }
1573 if (*cp) {
1574 sp = cp + strlen(cp);
1575 append_literal(cp, sp, &state);
1576 }
1577 if (need_color_reset_at_eol) {
1578 struct atom_value resetv;
1579 char color[COLOR_MAXLEN] = "";
1580
1581 if (color_parse("reset", color) < 0)
1582 die("BUG: couldn't parse 'reset' as a color");
1583 resetv.s = color;
1584 append_atom(&resetv, &state);
1585 }
1586 if (state.stack->prev)
1587 die(_("format: %%(end) atom missing"));
1588 final_buf = &state.stack->output;
1589 fwrite(final_buf->buf, 1, final_buf->len, stdout);
1590 pop_stack_element(&state.stack);
1591 putchar('\n');
1592 }
1593
1594 /* If no sorting option is given, use refname to sort as default */
1595 struct ref_sorting *ref_default_sorting(void)
1596 {
1597 static const char cstr_name[] = "refname";
1598
1599 struct ref_sorting *sorting = xcalloc(1, sizeof(*sorting));
1600
1601 sorting->next = NULL;
1602 sorting->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
1603 return sorting;
1604 }
1605
1606 int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
1607 {
1608 struct ref_sorting **sorting_tail = opt->value;
1609 struct ref_sorting *s;
1610 int len;
1611
1612 if (!arg) /* should --no-sort void the list ? */
1613 return -1;
1614
1615 s = xcalloc(1, sizeof(*s));
1616 s->next = *sorting_tail;
1617 *sorting_tail = s;
1618
1619 if (*arg == '-') {
1620 s->reverse = 1;
1621 arg++;
1622 }
1623 if (skip_prefix(arg, "version:", &arg) ||
1624 skip_prefix(arg, "v:", &arg))
1625 s->version = 1;
1626 len = strlen(arg);
1627 s->atom = parse_ref_filter_atom(arg, arg+len);
1628 return 0;
1629 }
1630
1631 int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
1632 {
1633 struct ref_filter *rf = opt->value;
1634 unsigned char sha1[20];
1635
1636 rf->merge = starts_with(opt->long_name, "no")
1637 ? REF_FILTER_MERGED_OMIT
1638 : REF_FILTER_MERGED_INCLUDE;
1639
1640 if (get_sha1(arg, sha1))
1641 die(_("malformed object name %s"), arg);
1642
1643 rf->merge_commit = lookup_commit_reference_gently(sha1, 0);
1644 if (!rf->merge_commit)
1645 return opterror(opt, "must point to a commit", 0);
1646
1647 return 0;
1648 }
git for Debian