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Merge branch 'jc/linkgit-fix' into maint
[alt-git.git] / ref-filter.c
blobbc551a752c460cd4751034b3d69d7e9b5dfc775e
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 struct align {
20 align_type position;
21 unsigned int width;
22 };
23
24 /*
25 * An atom is a valid field atom listed below, possibly prefixed with
26 * a "*" to denote deref_tag().
27 *
28 * We parse given format string and sort specifiers, and make a list
29 * of properties that we need to extract out of objects. ref_array_item
30 * structure will hold an array of values extracted that can be
31 * indexed with the "atom number", which is an index into this
32 * array.
33 */
34 static struct used_atom {
35 const char *name;
36 cmp_type type;
37 union {
38 char color[COLOR_MAXLEN];
39 struct align align;
40 enum { RR_NORMAL, RR_SHORTEN, RR_TRACK, RR_TRACKSHORT }
41 remote_ref;
42 struct {
43 enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB } option;
44 unsigned int nlines;
45 } contents;
46 enum { O_FULL, O_SHORT } objectname;
47 } u;
48 } *used_atom;
49 static int used_atom_cnt, need_tagged, need_symref;
50 static int need_color_reset_at_eol;
51
52 static void color_atom_parser(struct used_atom *atom, const char *color_value)
53 {
54 if (!color_value)
55 die(_("expected format: %%(color:<color>)"));
56 if (color_parse(color_value, atom->u.color) < 0)
57 die(_("unrecognized color: %%(color:%s)"), color_value);
58 }
59
60 static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
61 {
62 if (!arg)
63 atom->u.remote_ref = RR_NORMAL;
64 else if (!strcmp(arg, "short"))
65 atom->u.remote_ref = RR_SHORTEN;
66 else if (!strcmp(arg, "track"))
67 atom->u.remote_ref = RR_TRACK;
68 else if (!strcmp(arg, "trackshort"))
69 atom->u.remote_ref = RR_TRACKSHORT;
70 else
71 die(_("unrecognized format: %%(%s)"), atom->name);
72 }
73
74 static void body_atom_parser(struct used_atom *atom, const char *arg)
75 {
76 if (arg)
77 die(_("%%(body) does not take arguments"));
78 atom->u.contents.option = C_BODY_DEP;
79 }
80
81 static void subject_atom_parser(struct used_atom *atom, const char *arg)
82 {
83 if (arg)
84 die(_("%%(subject) does not take arguments"));
85 atom->u.contents.option = C_SUB;
86 }
87
88 static void contents_atom_parser(struct used_atom *atom, const char *arg)
89 {
90 if (!arg)
91 atom->u.contents.option = C_BARE;
92 else if (!strcmp(arg, "body"))
93 atom->u.contents.option = C_BODY;
94 else if (!strcmp(arg, "signature"))
95 atom->u.contents.option = C_SIG;
96 else if (!strcmp(arg, "subject"))
97 atom->u.contents.option = C_SUB;
98 else if (skip_prefix(arg, "lines=", &arg)) {
99 atom->u.contents.option = C_LINES;
100 if (strtoul_ui(arg, 10, &atom->u.contents.nlines))
101 die(_("positive value expected contents:lines=%s"), arg);
102 } else
103 die(_("unrecognized %%(contents) argument: %s"), arg);
104 }
105
106 static void objectname_atom_parser(struct used_atom *atom, const char *arg)
107 {
108 if (!arg)
109 atom->u.objectname = O_FULL;
110 else if (!strcmp(arg, "short"))
111 atom->u.objectname = O_SHORT;
112 else
113 die(_("unrecognized %%(objectname) argument: %s"), arg);
114 }
115
116 static align_type parse_align_position(const char *s)
117 {
118 if (!strcmp(s, "right"))
119 return ALIGN_RIGHT;
120 else if (!strcmp(s, "middle"))
121 return ALIGN_MIDDLE;
122 else if (!strcmp(s, "left"))
123 return ALIGN_LEFT;
124 return -1;
125 }
126
127 static void align_atom_parser(struct used_atom *atom, const char *arg)
128 {
129 struct align *align = &atom->u.align;
130 struct string_list params = STRING_LIST_INIT_DUP;
131 int i;
132 unsigned int width = ~0U;
133
134 if (!arg)
135 die(_("expected format: %%(align:<width>,<position>)"));
136
137 align->position = ALIGN_LEFT;
138
139 string_list_split(&params, arg, ',', -1);
140 for (i = 0; i < params.nr; i++) {
141 const char *s = params.items[i].string;
142 int position;
143
144 if (skip_prefix(s, "position=", &s)) {
145 position = parse_align_position(s);
146 if (position < 0)
147 die(_("unrecognized position:%s"), s);
148 align->position = position;
149 } else if (skip_prefix(s, "width=", &s)) {
150 if (strtoul_ui(s, 10, &width))
151 die(_("unrecognized width:%s"), s);
152 } else if (!strtoul_ui(s, 10, &width))
153 ;
154 else if ((position = parse_align_position(s)) >= 0)
155 align->position = position;
156 else
157 die(_("unrecognized %%(align) argument: %s"), s);
158 }
159
160 if (width == ~0U)
161 die(_("positive width expected with the %%(align) atom"));
162 align->width = width;
163 string_list_clear(&params, 0);
164 }
165
166 static struct {
167 const char *name;
168 cmp_type cmp_type;
169 void (*parser)(struct used_atom *atom, const char *arg);
170 } valid_atom[] = {
171 { "refname" },
172 { "objecttype" },
173 { "objectsize", FIELD_ULONG },
174 { "objectname", FIELD_STR, objectname_atom_parser },
175 { "tree" },
176 { "parent" },
177 { "numparent", FIELD_ULONG },
178 { "object" },
179 { "type" },
180 { "tag" },
181 { "author" },
182 { "authorname" },
183 { "authoremail" },
184 { "authordate", FIELD_TIME },
185 { "committer" },
186 { "committername" },
187 { "committeremail" },
188 { "committerdate", FIELD_TIME },
189 { "tagger" },
190 { "taggername" },
191 { "taggeremail" },
192 { "taggerdate", FIELD_TIME },
193 { "creator" },
194 { "creatordate", FIELD_TIME },
195 { "subject", FIELD_STR, subject_atom_parser },
196 { "body", FIELD_STR, body_atom_parser },
197 { "contents", FIELD_STR, contents_atom_parser },
198 { "upstream", FIELD_STR, remote_ref_atom_parser },
199 { "push", FIELD_STR, remote_ref_atom_parser },
200 { "symref" },
201 { "flag" },
202 { "HEAD" },
203 { "color", FIELD_STR, color_atom_parser },
204 { "align", FIELD_STR, align_atom_parser },
205 { "end" },
206 };
207
208 #define REF_FORMATTING_STATE_INIT { 0, NULL }
209
210 struct ref_formatting_stack {
211 struct ref_formatting_stack *prev;
212 struct strbuf output;
213 void (*at_end)(struct ref_formatting_stack *stack);
214 void *at_end_data;
215 };
216
217 struct ref_formatting_state {
218 int quote_style;
219 struct ref_formatting_stack *stack;
220 };
221
222 struct atom_value {
223 const char *s;
224 union {
225 struct align align;
226 } u;
227 void (*handler)(struct atom_value *atomv, struct ref_formatting_state *state);
228 unsigned long ul; /* used for sorting when not FIELD_STR */
229 };
230
231 /*
232 * Used to parse format string and sort specifiers
233 */
234 int parse_ref_filter_atom(const char *atom, const char *ep)
235 {
236 const char *sp;
237 const char *arg;
238 int i, at;
239
240 sp = atom;
241 if (*sp == '*' && sp < ep)
242 sp++; /* deref */
243 if (ep <= sp)
244 die(_("malformed field name: %.*s"), (int)(ep-atom), atom);
245
246 /* Do we have the atom already used elsewhere? */
247 for (i = 0; i < used_atom_cnt; i++) {
248 int len = strlen(used_atom[i].name);
249 if (len == ep - atom && !memcmp(used_atom[i].name, atom, len))
250 return i;
251 }
252
253 /* Is the atom a valid one? */
254 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
255 int len = strlen(valid_atom[i].name);
256
257 /*
258 * If the atom name has a colon, strip it and everything after
259 * it off - it specifies the format for this entry, and
260 * shouldn't be used for checking against the valid_atom
261 * table.
262 */
263 arg = memchr(sp, ':', ep - sp);
264 if (len == (arg ? arg : ep) - sp &&
265 !memcmp(valid_atom[i].name, sp, len))
266 break;
267 }
268
269 if (ARRAY_SIZE(valid_atom) <= i)
270 die(_("unknown field name: %.*s"), (int)(ep-atom), atom);
271
272 /* Add it in, including the deref prefix */
273 at = used_atom_cnt;
274 used_atom_cnt++;
275 REALLOC_ARRAY(used_atom, used_atom_cnt);
276 used_atom[at].name = xmemdupz(atom, ep - atom);
277 used_atom[at].type = valid_atom[i].cmp_type;
278 if (arg)
279 arg = used_atom[at].name + (arg - atom) + 1;
280 memset(&used_atom[at].u, 0, sizeof(used_atom[at].u));
281 if (valid_atom[i].parser)
282 valid_atom[i].parser(&used_atom[at], arg);
283 if (*atom == '*')
284 need_tagged = 1;
285 if (!strcmp(used_atom[at].name, "symref"))
286 need_symref = 1;
287 return at;
288 }
289
290 static void quote_formatting(struct strbuf *s, const char *str, int quote_style)
291 {
292 switch (quote_style) {
293 case QUOTE_NONE:
294 strbuf_addstr(s, str);
295 break;
296 case QUOTE_SHELL:
297 sq_quote_buf(s, str);
298 break;
299 case QUOTE_PERL:
300 perl_quote_buf(s, str);
301 break;
302 case QUOTE_PYTHON:
303 python_quote_buf(s, str);
304 break;
305 case QUOTE_TCL:
306 tcl_quote_buf(s, str);
307 break;
308 }
309 }
310
311 static void append_atom(struct atom_value *v, struct ref_formatting_state *state)
312 {
313 /*
314 * Quote formatting is only done when the stack has a single
315 * element. Otherwise quote formatting is done on the
316 * element's entire output strbuf when the %(end) atom is
317 * encountered.
318 */
319 if (!state->stack->prev)
320 quote_formatting(&state->stack->output, v->s, state->quote_style);
321 else
322 strbuf_addstr(&state->stack->output, v->s);
323 }
324
325 static void push_stack_element(struct ref_formatting_stack **stack)
326 {
327 struct ref_formatting_stack *s = xcalloc(1, sizeof(struct ref_formatting_stack));
328
329 strbuf_init(&s->output, 0);
330 s->prev = *stack;
331 *stack = s;
332 }
333
334 static void pop_stack_element(struct ref_formatting_stack **stack)
335 {
336 struct ref_formatting_stack *current = *stack;
337 struct ref_formatting_stack *prev = current->prev;
338
339 if (prev)
340 strbuf_addbuf(&prev->output, &current->output);
341 strbuf_release(&current->output);
342 free(current);
343 *stack = prev;
344 }
345
346 static void end_align_handler(struct ref_formatting_stack *stack)
347 {
348 struct align *align = (struct align *)stack->at_end_data;
349 struct strbuf s = STRBUF_INIT;
350
351 strbuf_utf8_align(&s, align->position, align->width, stack->output.buf);
352 strbuf_swap(&stack->output, &s);
353 strbuf_release(&s);
354 }
355
356 static void align_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
357 {
358 struct ref_formatting_stack *new;
359
360 push_stack_element(&state->stack);
361 new = state->stack;
362 new->at_end = end_align_handler;
363 new->at_end_data = &atomv->u.align;
364 }
365
366 static void end_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
367 {
368 struct ref_formatting_stack *current = state->stack;
369 struct strbuf s = STRBUF_INIT;
370
371 if (!current->at_end)
372 die(_("format: %%(end) atom used without corresponding atom"));
373 current->at_end(current);
374
375 /*
376 * Perform quote formatting when the stack element is that of
377 * a supporting atom. If nested then perform quote formatting
378 * only on the topmost supporting atom.
379 */
380 if (!state->stack->prev->prev) {
381 quote_formatting(&s, current->output.buf, state->quote_style);
382 strbuf_swap(&current->output, &s);
383 }
384 strbuf_release(&s);
385 pop_stack_element(&state->stack);
386 }
387
388 /*
389 * In a format string, find the next occurrence of %(atom).
390 */
391 static const char *find_next(const char *cp)
392 {
393 while (*cp) {
394 if (*cp == '%') {
395 /*
396 * %( is the start of an atom;
397 * %% is a quoted per-cent.
398 */
399 if (cp[1] == '(')
400 return cp;
401 else if (cp[1] == '%')
402 cp++; /* skip over two % */
403 /* otherwise this is a singleton, literal % */
404 }
405 cp++;
406 }
407 return NULL;
408 }
409
410 /*
411 * Make sure the format string is well formed, and parse out
412 * the used atoms.
413 */
414 int verify_ref_format(const char *format)
415 {
416 const char *cp, *sp;
417
418 need_color_reset_at_eol = 0;
419 for (cp = format; *cp && (sp = find_next(cp)); ) {
420 const char *color, *ep = strchr(sp, ')');
421 int at;
422
423 if (!ep)
424 return error(_("malformed format string %s"), sp);
425 /* sp points at "%(" and ep points at the closing ")" */
426 at = parse_ref_filter_atom(sp + 2, ep);
427 cp = ep + 1;
428
429 if (skip_prefix(used_atom[at].name, "color:", &color))
430 need_color_reset_at_eol = !!strcmp(color, "reset");
431 }
432 return 0;
433 }
434
435 /*
436 * Given an object name, read the object data and size, and return a
437 * "struct object". If the object data we are returning is also borrowed
438 * by the "struct object" representation, set *eaten as well---it is a
439 * signal from parse_object_buffer to us not to free the buffer.
440 */
441 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
442 {
443 enum object_type type;
444 void *buf = read_sha1_file(sha1, &type, sz);
445
446 if (buf)
447 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
448 else
449 *obj = NULL;
450 return buf;
451 }
452
453 static int grab_objectname(const char *name, const unsigned char *sha1,
454 struct atom_value *v, struct used_atom *atom)
455 {
456 if (starts_with(name, "objectname")) {
457 if (atom->u.objectname == O_SHORT) {
458 v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
459 return 1;
460 } else if (atom->u.objectname == O_FULL) {
461 v->s = xstrdup(sha1_to_hex(sha1));
462 return 1;
463 } else
464 die("BUG: unknown %%(objectname) option");
465 }
466 return 0;
467 }
468
469 /* See grab_values */
470 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
471 {
472 int i;
473
474 for (i = 0; i < used_atom_cnt; i++) {
475 const char *name = used_atom[i].name;
476 struct atom_value *v = &val[i];
477 if (!!deref != (*name == '*'))
478 continue;
479 if (deref)
480 name++;
481 if (!strcmp(name, "objecttype"))
482 v->s = typename(obj->type);
483 else if (!strcmp(name, "objectsize")) {
484 v->ul = sz;
485 v->s = xstrfmt("%lu", sz);
486 }
487 else if (deref)
488 grab_objectname(name, obj->oid.hash, v, &used_atom[i]);
489 }
490 }
491
492 /* See grab_values */
493 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
494 {
495 int i;
496 struct tag *tag = (struct tag *) obj;
497
498 for (i = 0; i < used_atom_cnt; i++) {
499 const char *name = used_atom[i].name;
500 struct atom_value *v = &val[i];
501 if (!!deref != (*name == '*'))
502 continue;
503 if (deref)
504 name++;
505 if (!strcmp(name, "tag"))
506 v->s = tag->tag;
507 else if (!strcmp(name, "type") && tag->tagged)
508 v->s = typename(tag->tagged->type);
509 else if (!strcmp(name, "object") && tag->tagged)
510 v->s = xstrdup(oid_to_hex(&tag->tagged->oid));
511 }
512 }
513
514 /* See grab_values */
515 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
516 {
517 int i;
518 struct commit *commit = (struct commit *) obj;
519
520 for (i = 0; i < used_atom_cnt; i++) {
521 const char *name = used_atom[i].name;
522 struct atom_value *v = &val[i];
523 if (!!deref != (*name == '*'))
524 continue;
525 if (deref)
526 name++;
527 if (!strcmp(name, "tree")) {
528 v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
529 }
530 else if (!strcmp(name, "numparent")) {
531 v->ul = commit_list_count(commit->parents);
532 v->s = xstrfmt("%lu", v->ul);
533 }
534 else if (!strcmp(name, "parent")) {
535 struct commit_list *parents;
536 struct strbuf s = STRBUF_INIT;
537 for (parents = commit->parents; parents; parents = parents->next) {
538 struct commit *parent = parents->item;
539 if (parents != commit->parents)
540 strbuf_addch(&s, ' ');
541 strbuf_addstr(&s, oid_to_hex(&parent->object.oid));
542 }
543 v->s = strbuf_detach(&s, NULL);
544 }
545 }
546 }
547
548 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
549 {
550 const char *eol;
551 while (*buf) {
552 if (!strncmp(buf, who, wholen) &&
553 buf[wholen] == ' ')
554 return buf + wholen + 1;
555 eol = strchr(buf, '\n');
556 if (!eol)
557 return "";
558 eol++;
559 if (*eol == '\n')
560 return ""; /* end of header */
561 buf = eol;
562 }
563 return "";
564 }
565
566 static const char *copy_line(const char *buf)
567 {
568 const char *eol = strchrnul(buf, '\n');
569 return xmemdupz(buf, eol - buf);
570 }
571
572 static const char *copy_name(const char *buf)
573 {
574 const char *cp;
575 for (cp = buf; *cp && *cp != '\n'; cp++) {
576 if (!strncmp(cp, " <", 2))
577 return xmemdupz(buf, cp - buf);
578 }
579 return "";
580 }
581
582 static const char *copy_email(const char *buf)
583 {
584 const char *email = strchr(buf, '<');
585 const char *eoemail;
586 if (!email)
587 return "";
588 eoemail = strchr(email, '>');
589 if (!eoemail)
590 return "";
591 return xmemdupz(email, eoemail + 1 - email);
592 }
593
594 static char *copy_subject(const char *buf, unsigned long len)
595 {
596 char *r = xmemdupz(buf, len);
597 int i;
598
599 for (i = 0; i < len; i++)
600 if (r[i] == '\n')
601 r[i] = ' ';
602
603 return r;
604 }
605
606 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
607 {
608 const char *eoemail = strstr(buf, "> ");
609 char *zone;
610 unsigned long timestamp;
611 long tz;
612 struct date_mode date_mode = { DATE_NORMAL };
613 const char *formatp;
614
615 /*
616 * We got here because atomname ends in "date" or "date<something>";
617 * it's not possible that <something> is not ":<format>" because
618 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
619 * ":" means no format is specified, and use the default.
620 */
621 formatp = strchr(atomname, ':');
622 if (formatp != NULL) {
623 formatp++;
624 parse_date_format(formatp, &date_mode);
625 }
626
627 if (!eoemail)
628 goto bad;
629 timestamp = strtoul(eoemail + 2, &zone, 10);
630 if (timestamp == ULONG_MAX)
631 goto bad;
632 tz = strtol(zone, NULL, 10);
633 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
634 goto bad;
635 v->s = xstrdup(show_date(timestamp, tz, &date_mode));
636 v->ul = timestamp;
637 return;
638 bad:
639 v->s = "";
640 v->ul = 0;
641 }
642
643 /* See grab_values */
644 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
645 {
646 int i;
647 int wholen = strlen(who);
648 const char *wholine = NULL;
649
650 for (i = 0; i < used_atom_cnt; i++) {
651 const char *name = used_atom[i].name;
652 struct atom_value *v = &val[i];
653 if (!!deref != (*name == '*'))
654 continue;
655 if (deref)
656 name++;
657 if (strncmp(who, name, wholen))
658 continue;
659 if (name[wholen] != 0 &&
660 strcmp(name + wholen, "name") &&
661 strcmp(name + wholen, "email") &&
662 !starts_with(name + wholen, "date"))
663 continue;
664 if (!wholine)
665 wholine = find_wholine(who, wholen, buf, sz);
666 if (!wholine)
667 return; /* no point looking for it */
668 if (name[wholen] == 0)
669 v->s = copy_line(wholine);
670 else if (!strcmp(name + wholen, "name"))
671 v->s = copy_name(wholine);
672 else if (!strcmp(name + wholen, "email"))
673 v->s = copy_email(wholine);
674 else if (starts_with(name + wholen, "date"))
675 grab_date(wholine, v, name);
676 }
677
678 /*
679 * For a tag or a commit object, if "creator" or "creatordate" is
680 * requested, do something special.
681 */
682 if (strcmp(who, "tagger") && strcmp(who, "committer"))
683 return; /* "author" for commit object is not wanted */
684 if (!wholine)
685 wholine = find_wholine(who, wholen, buf, sz);
686 if (!wholine)
687 return;
688 for (i = 0; i < used_atom_cnt; i++) {
689 const char *name = used_atom[i].name;
690 struct atom_value *v = &val[i];
691 if (!!deref != (*name == '*'))
692 continue;
693 if (deref)
694 name++;
695
696 if (starts_with(name, "creatordate"))
697 grab_date(wholine, v, name);
698 else if (!strcmp(name, "creator"))
699 v->s = copy_line(wholine);
700 }
701 }
702
703 static void find_subpos(const char *buf, unsigned long sz,
704 const char **sub, unsigned long *sublen,
705 const char **body, unsigned long *bodylen,
706 unsigned long *nonsiglen,
707 const char **sig, unsigned long *siglen)
708 {
709 const char *eol;
710 /* skip past header until we hit empty line */
711 while (*buf && *buf != '\n') {
712 eol = strchrnul(buf, '\n');
713 if (*eol)
714 eol++;
715 buf = eol;
716 }
717 /* skip any empty lines */
718 while (*buf == '\n')
719 buf++;
720
721 /* parse signature first; we might not even have a subject line */
722 *sig = buf + parse_signature(buf, strlen(buf));
723 *siglen = strlen(*sig);
724
725 /* subject is first non-empty line */
726 *sub = buf;
727 /* subject goes to first empty line */
728 while (buf < *sig && *buf && *buf != '\n') {
729 eol = strchrnul(buf, '\n');
730 if (*eol)
731 eol++;
732 buf = eol;
733 }
734 *sublen = buf - *sub;
735 /* drop trailing newline, if present */
736 if (*sublen && (*sub)[*sublen - 1] == '\n')
737 *sublen -= 1;
738
739 /* skip any empty lines */
740 while (*buf == '\n')
741 buf++;
742 *body = buf;
743 *bodylen = strlen(buf);
744 *nonsiglen = *sig - buf;
745 }
746
747 /*
748 * If 'lines' is greater than 0, append that many lines from the given
749 * 'buf' of length 'size' to the given strbuf.
750 */
751 static void append_lines(struct strbuf *out, const char *buf, unsigned long size, int lines)
752 {
753 int i;
754 const char *sp, *eol;
755 size_t len;
756
757 sp = buf;
758
759 for (i = 0; i < lines && sp < buf + size; i++) {
760 if (i)
761 strbuf_addstr(out, "\n ");
762 eol = memchr(sp, '\n', size - (sp - buf));
763 len = eol ? eol - sp : size - (sp - buf);
764 strbuf_add(out, sp, len);
765 if (!eol)
766 break;
767 sp = eol + 1;
768 }
769 }
770
771 /* See grab_values */
772 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
773 {
774 int i;
775 const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
776 unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
777
778 for (i = 0; i < used_atom_cnt; i++) {
779 struct used_atom *atom = &used_atom[i];
780 const char *name = atom->name;
781 struct atom_value *v = &val[i];
782 if (!!deref != (*name == '*'))
783 continue;
784 if (deref)
785 name++;
786 if (strcmp(name, "subject") &&
787 strcmp(name, "body") &&
788 !starts_with(name, "contents"))
789 continue;
790 if (!subpos)
791 find_subpos(buf, sz,
792 &subpos, &sublen,
793 &bodypos, &bodylen, &nonsiglen,
794 &sigpos, &siglen);
795
796 if (atom->u.contents.option == C_SUB)
797 v->s = copy_subject(subpos, sublen);
798 else if (atom->u.contents.option == C_BODY_DEP)
799 v->s = xmemdupz(bodypos, bodylen);
800 else if (atom->u.contents.option == C_BODY)
801 v->s = xmemdupz(bodypos, nonsiglen);
802 else if (atom->u.contents.option == C_SIG)
803 v->s = xmemdupz(sigpos, siglen);
804 else if (atom->u.contents.option == C_LINES) {
805 struct strbuf s = STRBUF_INIT;
806 const char *contents_end = bodylen + bodypos - siglen;
807
808 /* Size is the length of the message after removing the signature */
809 append_lines(&s, subpos, contents_end - subpos, atom->u.contents.nlines);
810 v->s = strbuf_detach(&s, NULL);
811 } else if (atom->u.contents.option == C_BARE)
812 v->s = xstrdup(subpos);
813 }
814 }
815
816 /*
817 * We want to have empty print-string for field requests
818 * that do not apply (e.g. "authordate" for a tag object)
819 */
820 static void fill_missing_values(struct atom_value *val)
821 {
822 int i;
823 for (i = 0; i < used_atom_cnt; i++) {
824 struct atom_value *v = &val[i];
825 if (v->s == NULL)
826 v->s = "";
827 }
828 }
829
830 /*
831 * val is a list of atom_value to hold returned values. Extract
832 * the values for atoms in used_atom array out of (obj, buf, sz).
833 * when deref is false, (obj, buf, sz) is the object that is
834 * pointed at by the ref itself; otherwise it is the object the
835 * ref (which is a tag) refers to.
836 */
837 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
838 {
839 grab_common_values(val, deref, obj, buf, sz);
840 switch (obj->type) {
841 case OBJ_TAG:
842 grab_tag_values(val, deref, obj, buf, sz);
843 grab_sub_body_contents(val, deref, obj, buf, sz);
844 grab_person("tagger", val, deref, obj, buf, sz);
845 break;
846 case OBJ_COMMIT:
847 grab_commit_values(val, deref, obj, buf, sz);
848 grab_sub_body_contents(val, deref, obj, buf, sz);
849 grab_person("author", val, deref, obj, buf, sz);
850 grab_person("committer", val, deref, obj, buf, sz);
851 break;
852 case OBJ_TREE:
853 /* grab_tree_values(val, deref, obj, buf, sz); */
854 break;
855 case OBJ_BLOB:
856 /* grab_blob_values(val, deref, obj, buf, sz); */
857 break;
858 default:
859 die("Eh? Object of type %d?", obj->type);
860 }
861 }
862
863 static inline char *copy_advance(char *dst, const char *src)
864 {
865 while (*src)
866 *dst++ = *src++;
867 return dst;
868 }
869
870 static const char *strip_ref_components(const char *refname, const char *nr_arg)
871 {
872 char *end;
873 long nr = strtol(nr_arg, &end, 10);
874 long remaining = nr;
875 const char *start = refname;
876
877 if (nr < 1 || *end != '\0')
878 die(_(":strip= requires a positive integer argument"));
879
880 while (remaining) {
881 switch (*start++) {
882 case '\0':
883 die(_("ref '%s' does not have %ld components to :strip"),
884 refname, nr);
885 case '/':
886 remaining--;
887 break;
888 }
889 }
890 return start;
891 }
892
893 static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
894 struct branch *branch, const char **s)
895 {
896 int num_ours, num_theirs;
897 if (atom->u.remote_ref == RR_SHORTEN)
898 *s = shorten_unambiguous_ref(refname, warn_ambiguous_refs);
899 else if (atom->u.remote_ref == RR_TRACK) {
900 if (stat_tracking_info(branch, &num_ours,
901 &num_theirs, NULL))
902 return;
903
904 if (!num_ours && !num_theirs)
905 *s = "";
906 else if (!num_ours)
907 *s = xstrfmt("[behind %d]", num_theirs);
908 else if (!num_theirs)
909 *s = xstrfmt("[ahead %d]", num_ours);
910 else
911 *s = xstrfmt("[ahead %d, behind %d]",
912 num_ours, num_theirs);
913 } else if (atom->u.remote_ref == RR_TRACKSHORT) {
914 if (stat_tracking_info(branch, &num_ours,
915 &num_theirs, NULL))
916 return;
917
918 if (!num_ours && !num_theirs)
919 *s = "=";
920 else if (!num_ours)
921 *s = "<";
922 else if (!num_theirs)
923 *s = ">";
924 else
925 *s = "<>";
926 } else /* RR_NORMAL */
927 *s = refname;
928 }
929
930 /*
931 * Parse the object referred by ref, and grab needed value.
932 */
933 static void populate_value(struct ref_array_item *ref)
934 {
935 void *buf;
936 struct object *obj;
937 int eaten, i;
938 unsigned long size;
939 const unsigned char *tagged;
940
941 ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
942
943 if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
944 unsigned char unused1[20];
945 ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
946 unused1, NULL);
947 if (!ref->symref)
948 ref->symref = "";
949 }
950
951 /* Fill in specials first */
952 for (i = 0; i < used_atom_cnt; i++) {
953 struct used_atom *atom = &used_atom[i];
954 const char *name = used_atom[i].name;
955 struct atom_value *v = &ref->value[i];
956 int deref = 0;
957 const char *refname;
958 const char *formatp;
959 struct branch *branch = NULL;
960
961 v->handler = append_atom;
962
963 if (*name == '*') {
964 deref = 1;
965 name++;
966 }
967
968 if (starts_with(name, "refname"))
969 refname = ref->refname;
970 else if (starts_with(name, "symref"))
971 refname = ref->symref ? ref->symref : "";
972 else if (starts_with(name, "upstream")) {
973 const char *branch_name;
974 /* only local branches may have an upstream */
975 if (!skip_prefix(ref->refname, "refs/heads/",
976 &branch_name))
977 continue;
978 branch = branch_get(branch_name);
979
980 refname = branch_get_upstream(branch, NULL);
981 if (refname)
982 fill_remote_ref_details(atom, refname, branch, &v->s);
983 continue;
984 } else if (starts_with(name, "push")) {
985 const char *branch_name;
986 if (!skip_prefix(ref->refname, "refs/heads/",
987 &branch_name))
988 continue;
989 branch = branch_get(branch_name);
990
991 refname = branch_get_push(branch, NULL);
992 if (!refname)
993 continue;
994 fill_remote_ref_details(atom, refname, branch, &v->s);
995 continue;
996 } else if (starts_with(name, "color:")) {
997 v->s = atom->u.color;
998 continue;
999 } else if (!strcmp(name, "flag")) {
1000 char buf[256], *cp = buf;
1001 if (ref->flag & REF_ISSYMREF)
1002 cp = copy_advance(cp, ",symref");
1003 if (ref->flag & REF_ISPACKED)
1004 cp = copy_advance(cp, ",packed");
1005 if (cp == buf)
1006 v->s = "";
1007 else {
1008 *cp = '\0';
1009 v->s = xstrdup(buf + 1);
1010 }
1011 continue;
1012 } else if (!deref && grab_objectname(name, ref->objectname, v, atom)) {
1013 continue;
1014 } else if (!strcmp(name, "HEAD")) {
1015 const char *head;
1016 unsigned char sha1[20];
1017
1018 head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
1019 sha1, NULL);
1020 if (!strcmp(ref->refname, head))
1021 v->s = "*";
1022 else
1023 v->s = " ";
1024 continue;
1025 } else if (starts_with(name, "align")) {
1026 v->u.align = atom->u.align;
1027 v->handler = align_atom_handler;
1028 continue;
1029 } else if (!strcmp(name, "end")) {
1030 v->handler = end_atom_handler;
1031 continue;
1032 } else
1033 continue;
1034
1035 formatp = strchr(name, ':');
1036 if (formatp) {
1037 const char *arg;
1038
1039 formatp++;
1040 if (!strcmp(formatp, "short"))
1041 refname = shorten_unambiguous_ref(refname,
1042 warn_ambiguous_refs);
1043 else if (skip_prefix(formatp, "strip=", &arg))
1044 refname = strip_ref_components(refname, arg);
1045 else
1046 die(_("unknown %.*s format %s"),
1047 (int)(formatp - name), name, formatp);
1048 }
1049
1050 if (!deref)
1051 v->s = refname;
1052 else
1053 v->s = xstrfmt("%s^{}", refname);
1054 }
1055
1056 for (i = 0; i < used_atom_cnt; i++) {
1057 struct atom_value *v = &ref->value[i];
1058 if (v->s == NULL)
1059 goto need_obj;
1060 }
1061 return;
1062
1063 need_obj:
1064 buf = get_obj(ref->objectname, &obj, &size, &eaten);
1065 if (!buf)
1066 die(_("missing object %s for %s"),
1067 sha1_to_hex(ref->objectname), ref->refname);
1068 if (!obj)
1069 die(_("parse_object_buffer failed on %s for %s"),
1070 sha1_to_hex(ref->objectname), ref->refname);
1071
1072 grab_values(ref->value, 0, obj, buf, size);
1073 if (!eaten)
1074 free(buf);
1075
1076 /*
1077 * If there is no atom that wants to know about tagged
1078 * object, we are done.
1079 */
1080 if (!need_tagged || (obj->type != OBJ_TAG))
1081 return;
1082
1083 /*
1084 * If it is a tag object, see if we use a value that derefs
1085 * the object, and if we do grab the object it refers to.
1086 */
1087 tagged = ((struct tag *)obj)->tagged->oid.hash;
1088
1089 /*
1090 * NEEDSWORK: This derefs tag only once, which
1091 * is good to deal with chains of trust, but
1092 * is not consistent with what deref_tag() does
1093 * which peels the onion to the core.
1094 */
1095 buf = get_obj(tagged, &obj, &size, &eaten);
1096 if (!buf)
1097 die(_("missing object %s for %s"),
1098 sha1_to_hex(tagged), ref->refname);
1099 if (!obj)
1100 die(_("parse_object_buffer failed on %s for %s"),
1101 sha1_to_hex(tagged), ref->refname);
1102 grab_values(ref->value, 1, obj, buf, size);
1103 if (!eaten)
1104 free(buf);
1105 }
1106
1107 /*
1108 * Given a ref, return the value for the atom. This lazily gets value
1109 * out of the object by calling populate value.
1110 */
1111 static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
1112 {
1113 if (!ref->value) {
1114 populate_value(ref);
1115 fill_missing_values(ref->value);
1116 }
1117 *v = &ref->value[atom];
1118 }
1119
1120 enum contains_result {
1121 CONTAINS_UNKNOWN = -1,
1122 CONTAINS_NO = 0,
1123 CONTAINS_YES = 1
1124 };
1125
1126 /*
1127 * Mimicking the real stack, this stack lives on the heap, avoiding stack
1128 * overflows.
1129 *
1130 * At each recursion step, the stack items points to the commits whose
1131 * ancestors are to be inspected.
1132 */
1133 struct contains_stack {
1134 int nr, alloc;
1135 struct contains_stack_entry {
1136 struct commit *commit;
1137 struct commit_list *parents;
1138 } *contains_stack;
1139 };
1140
1141 static int in_commit_list(const struct commit_list *want, struct commit *c)
1142 {
1143 for (; want; want = want->next)
1144 if (!oidcmp(&want->item->object.oid, &c->object.oid))
1145 return 1;
1146 return 0;
1147 }
1148
1149 /*
1150 * Test whether the candidate or one of its parents is contained in the list.
1151 * Do not recurse to find out, though, but return -1 if inconclusive.
1152 */
1153 static enum contains_result contains_test(struct commit *candidate,
1154 const struct commit_list *want)
1155 {
1156 /* was it previously marked as containing a want commit? */
1157 if (candidate->object.flags & TMP_MARK)
1158 return 1;
1159 /* or marked as not possibly containing a want commit? */
1160 if (candidate->object.flags & UNINTERESTING)
1161 return 0;
1162 /* or are we it? */
1163 if (in_commit_list(want, candidate)) {
1164 candidate->object.flags |= TMP_MARK;
1165 return 1;
1166 }
1167
1168 if (parse_commit(candidate) < 0)
1169 return 0;
1170
1171 return -1;
1172 }
1173
1174 static void push_to_contains_stack(struct commit *candidate, struct contains_stack *contains_stack)
1175 {
1176 ALLOC_GROW(contains_stack->contains_stack, contains_stack->nr + 1, contains_stack->alloc);
1177 contains_stack->contains_stack[contains_stack->nr].commit = candidate;
1178 contains_stack->contains_stack[contains_stack->nr++].parents = candidate->parents;
1179 }
1180
1181 static enum contains_result contains_tag_algo(struct commit *candidate,
1182 const struct commit_list *want)
1183 {
1184 struct contains_stack contains_stack = { 0, 0, NULL };
1185 int result = contains_test(candidate, want);
1186
1187 if (result != CONTAINS_UNKNOWN)
1188 return result;
1189
1190 push_to_contains_stack(candidate, &contains_stack);
1191 while (contains_stack.nr) {
1192 struct contains_stack_entry *entry = &contains_stack.contains_stack[contains_stack.nr - 1];
1193 struct commit *commit = entry->commit;
1194 struct commit_list *parents = entry->parents;
1195
1196 if (!parents) {
1197 commit->object.flags |= UNINTERESTING;
1198 contains_stack.nr--;
1199 }
1200 /*
1201 * If we just popped the stack, parents->item has been marked,
1202 * therefore contains_test will return a meaningful 0 or 1.
1203 */
1204 else switch (contains_test(parents->item, want)) {
1205 case CONTAINS_YES:
1206 commit->object.flags |= TMP_MARK;
1207 contains_stack.nr--;
1208 break;
1209 case CONTAINS_NO:
1210 entry->parents = parents->next;
1211 break;
1212 case CONTAINS_UNKNOWN:
1213 push_to_contains_stack(parents->item, &contains_stack);
1214 break;
1215 }
1216 }
1217 free(contains_stack.contains_stack);
1218 return contains_test(candidate, want);
1219 }
1220
1221 static int commit_contains(struct ref_filter *filter, struct commit *commit)
1222 {
1223 if (filter->with_commit_tag_algo)
1224 return contains_tag_algo(commit, filter->with_commit);
1225 return is_descendant_of(commit, filter->with_commit);
1226 }
1227
1228 /*
1229 * Return 1 if the refname matches one of the patterns, otherwise 0.
1230 * A pattern can be a literal prefix (e.g. a refname "refs/heads/master"
1231 * matches a pattern "refs/heads/mas") or a wildcard (e.g. the same ref
1232 * matches "refs/heads/mas*", too).
1233 */
1234 static int match_pattern(const char **patterns, const char *refname)
1235 {
1236 /*
1237 * When no '--format' option is given we need to skip the prefix
1238 * for matching refs of tags and branches.
1239 */
1240 (void)(skip_prefix(refname, "refs/tags/", &refname) ||
1241 skip_prefix(refname, "refs/heads/", &refname) ||
1242 skip_prefix(refname, "refs/remotes/", &refname) ||
1243 skip_prefix(refname, "refs/", &refname));
1244
1245 for (; *patterns; patterns++) {
1246 if (!wildmatch(*patterns, refname, 0, NULL))
1247 return 1;
1248 }
1249 return 0;
1250 }
1251
1252 /*
1253 * Return 1 if the refname matches one of the patterns, otherwise 0.
1254 * A pattern can be path prefix (e.g. a refname "refs/heads/master"
1255 * matches a pattern "refs/heads/" but not "refs/heads/m") or a
1256 * wildcard (e.g. the same ref matches "refs/heads/m*", too).
1257 */
1258 static int match_name_as_path(const char **pattern, const char *refname)
1259 {
1260 int namelen = strlen(refname);
1261 for (; *pattern; pattern++) {
1262 const char *p = *pattern;
1263 int plen = strlen(p);
1264
1265 if ((plen <= namelen) &&
1266 !strncmp(refname, p, plen) &&
1267 (refname[plen] == '\0' ||
1268 refname[plen] == '/' ||
1269 p[plen-1] == '/'))
1270 return 1;
1271 if (!wildmatch(p, refname, WM_PATHNAME, NULL))
1272 return 1;
1273 }
1274 return 0;
1275 }
1276
1277 /* Return 1 if the refname matches one of the patterns, otherwise 0. */
1278 static int filter_pattern_match(struct ref_filter *filter, const char *refname)
1279 {
1280 if (!*filter->name_patterns)
1281 return 1; /* No pattern always matches */
1282 if (filter->match_as_path)
1283 return match_name_as_path(filter->name_patterns, refname);
1284 return match_pattern(filter->name_patterns, refname);
1285 }
1286
1287 /*
1288 * Given a ref (sha1, refname), check if the ref belongs to the array
1289 * of sha1s. If the given ref is a tag, check if the given tag points
1290 * at one of the sha1s in the given sha1 array.
1291 * the given sha1_array.
1292 * NEEDSWORK:
1293 * 1. Only a single level of inderection is obtained, we might want to
1294 * change this to account for multiple levels (e.g. annotated tags
1295 * pointing to annotated tags pointing to a commit.)
1296 * 2. As the refs are cached we might know what refname peels to without
1297 * the need to parse the object via parse_object(). peel_ref() might be a
1298 * more efficient alternative to obtain the pointee.
1299 */
1300 static const unsigned char *match_points_at(struct sha1_array *points_at,
1301 const unsigned char *sha1,
1302 const char *refname)
1303 {
1304 const unsigned char *tagged_sha1 = NULL;
1305 struct object *obj;
1306
1307 if (sha1_array_lookup(points_at, sha1) >= 0)
1308 return sha1;
1309 obj = parse_object(sha1);
1310 if (!obj)
1311 die(_("malformed object at '%s'"), refname);
1312 if (obj->type == OBJ_TAG)
1313 tagged_sha1 = ((struct tag *)obj)->tagged->oid.hash;
1314 if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
1315 return tagged_sha1;
1316 return NULL;
1317 }
1318
1319 /* Allocate space for a new ref_array_item and copy the objectname and flag to it */
1320 static struct ref_array_item *new_ref_array_item(const char *refname,
1321 const unsigned char *objectname,
1322 int flag)
1323 {
1324 struct ref_array_item *ref;
1325 FLEX_ALLOC_STR(ref, refname, refname);
1326 hashcpy(ref->objectname, objectname);
1327 ref->flag = flag;
1328
1329 return ref;
1330 }
1331
1332 static int filter_ref_kind(struct ref_filter *filter, const char *refname)
1333 {
1334 unsigned int i;
1335
1336 static struct {
1337 const char *prefix;
1338 unsigned int kind;
1339 } ref_kind[] = {
1340 { "refs/heads/" , FILTER_REFS_BRANCHES },
1341 { "refs/remotes/" , FILTER_REFS_REMOTES },
1342 { "refs/tags/", FILTER_REFS_TAGS}
1343 };
1344
1345 if (filter->kind == FILTER_REFS_BRANCHES ||
1346 filter->kind == FILTER_REFS_REMOTES ||
1347 filter->kind == FILTER_REFS_TAGS)
1348 return filter->kind;
1349 else if (!strcmp(refname, "HEAD"))
1350 return FILTER_REFS_DETACHED_HEAD;
1351
1352 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
1353 if (starts_with(refname, ref_kind[i].prefix))
1354 return ref_kind[i].kind;
1355 }
1356
1357 return FILTER_REFS_OTHERS;
1358 }
1359
1360 /*
1361 * A call-back given to for_each_ref(). Filter refs and keep them for
1362 * later object processing.
1363 */
1364 static int ref_filter_handler(const char *refname, const struct object_id *oid, int flag, void *cb_data)
1365 {
1366 struct ref_filter_cbdata *ref_cbdata = cb_data;
1367 struct ref_filter *filter = ref_cbdata->filter;
1368 struct ref_array_item *ref;
1369 struct commit *commit = NULL;
1370 unsigned int kind;
1371
1372 if (flag & REF_BAD_NAME) {
1373 warning(_("ignoring ref with broken name %s"), refname);
1374 return 0;
1375 }
1376
1377 if (flag & REF_ISBROKEN) {
1378 warning(_("ignoring broken ref %s"), refname);
1379 return 0;
1380 }
1381
1382 /* Obtain the current ref kind from filter_ref_kind() and ignore unwanted refs. */
1383 kind = filter_ref_kind(filter, refname);
1384 if (!(kind & filter->kind))
1385 return 0;
1386
1387 if (!filter_pattern_match(filter, refname))
1388 return 0;
1389
1390 if (filter->points_at.nr && !match_points_at(&filter->points_at, oid->hash, refname))
1391 return 0;
1392
1393 /*
1394 * A merge filter is applied on refs pointing to commits. Hence
1395 * obtain the commit using the 'oid' available and discard all
1396 * non-commits early. The actual filtering is done later.
1397 */
1398 if (filter->merge_commit || filter->with_commit || filter->verbose) {
1399 commit = lookup_commit_reference_gently(oid->hash, 1);
1400 if (!commit)
1401 return 0;
1402 /* We perform the filtering for the '--contains' option */
1403 if (filter->with_commit &&
1404 !commit_contains(filter, commit))
1405 return 0;
1406 }
1407
1408 /*
1409 * We do not open the object yet; sort may only need refname
1410 * to do its job and the resulting list may yet to be pruned
1411 * by maxcount logic.
1412 */
1413 ref = new_ref_array_item(refname, oid->hash, flag);
1414 ref->commit = commit;
1415
1416 REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
1417 ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
1418 ref->kind = kind;
1419 return 0;
1420 }
1421
1422 /* Free memory allocated for a ref_array_item */
1423 static void free_array_item(struct ref_array_item *item)
1424 {
1425 free((char *)item->symref);
1426 free(item);
1427 }
1428
1429 /* Free all memory allocated for ref_array */
1430 void ref_array_clear(struct ref_array *array)
1431 {
1432 int i;
1433
1434 for (i = 0; i < array->nr; i++)
1435 free_array_item(array->items[i]);
1436 free(array->items);
1437 array->items = NULL;
1438 array->nr = array->alloc = 0;
1439 }
1440
1441 static void do_merge_filter(struct ref_filter_cbdata *ref_cbdata)
1442 {
1443 struct rev_info revs;
1444 int i, old_nr;
1445 struct ref_filter *filter = ref_cbdata->filter;
1446 struct ref_array *array = ref_cbdata->array;
1447 struct commit **to_clear = xcalloc(sizeof(struct commit *), array->nr);
1448
1449 init_revisions(&revs, NULL);
1450
1451 for (i = 0; i < array->nr; i++) {
1452 struct ref_array_item *item = array->items[i];
1453 add_pending_object(&revs, &item->commit->object, item->refname);
1454 to_clear[i] = item->commit;
1455 }
1456
1457 filter->merge_commit->object.flags |= UNINTERESTING;
1458 add_pending_object(&revs, &filter->merge_commit->object, "");
1459
1460 revs.limited = 1;
1461 if (prepare_revision_walk(&revs))
1462 die(_("revision walk setup failed"));
1463
1464 old_nr = array->nr;
1465 array->nr = 0;
1466
1467 for (i = 0; i < old_nr; i++) {
1468 struct ref_array_item *item = array->items[i];
1469 struct commit *commit = item->commit;
1470
1471 int is_merged = !!(commit->object.flags & UNINTERESTING);
1472
1473 if (is_merged == (filter->merge == REF_FILTER_MERGED_INCLUDE))
1474 array->items[array->nr++] = array->items[i];
1475 else
1476 free_array_item(item);
1477 }
1478
1479 for (i = 0; i < old_nr; i++)
1480 clear_commit_marks(to_clear[i], ALL_REV_FLAGS);
1481 clear_commit_marks(filter->merge_commit, ALL_REV_FLAGS);
1482 free(to_clear);
1483 }
1484
1485 /*
1486 * API for filtering a set of refs. Based on the type of refs the user
1487 * has requested, we iterate through those refs and apply filters
1488 * as per the given ref_filter structure and finally store the
1489 * filtered refs in the ref_array structure.
1490 */
1491 int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int type)
1492 {
1493 struct ref_filter_cbdata ref_cbdata;
1494 int ret = 0;
1495 unsigned int broken = 0;
1496
1497 ref_cbdata.array = array;
1498 ref_cbdata.filter = filter;
1499
1500 if (type & FILTER_REFS_INCLUDE_BROKEN)
1501 broken = 1;
1502 filter->kind = type & FILTER_REFS_KIND_MASK;
1503
1504 /* Simple per-ref filtering */
1505 if (!filter->kind)
1506 die("filter_refs: invalid type");
1507 else {
1508 /*
1509 * For common cases where we need only branches or remotes or tags,
1510 * we only iterate through those refs. If a mix of refs is needed,
1511 * we iterate over all refs and filter out required refs with the help
1512 * of filter_ref_kind().
1513 */
1514 if (filter->kind == FILTER_REFS_BRANCHES)
1515 ret = for_each_fullref_in("refs/heads/", ref_filter_handler, &ref_cbdata, broken);
1516 else if (filter->kind == FILTER_REFS_REMOTES)
1517 ret = for_each_fullref_in("refs/remotes/", ref_filter_handler, &ref_cbdata, broken);
1518 else if (filter->kind == FILTER_REFS_TAGS)
1519 ret = for_each_fullref_in("refs/tags/", ref_filter_handler, &ref_cbdata, broken);
1520 else if (filter->kind & FILTER_REFS_ALL)
1521 ret = for_each_fullref_in("", ref_filter_handler, &ref_cbdata, broken);
1522 if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
1523 head_ref(ref_filter_handler, &ref_cbdata);
1524 }
1525
1526
1527 /* Filters that need revision walking */
1528 if (filter->merge_commit)
1529 do_merge_filter(&ref_cbdata);
1530
1531 return ret;
1532 }
1533
1534 static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
1535 {
1536 struct atom_value *va, *vb;
1537 int cmp;
1538 cmp_type cmp_type = used_atom[s->atom].type;
1539
1540 get_ref_atom_value(a, s->atom, &va);
1541 get_ref_atom_value(b, s->atom, &vb);
1542 if (s->version)
1543 cmp = versioncmp(va->s, vb->s);
1544 else if (cmp_type == FIELD_STR)
1545 cmp = strcmp(va->s, vb->s);
1546 else {
1547 if (va->ul < vb->ul)
1548 cmp = -1;
1549 else if (va->ul == vb->ul)
1550 cmp = strcmp(a->refname, b->refname);
1551 else
1552 cmp = 1;
1553 }
1554
1555 return (s->reverse) ? -cmp : cmp;
1556 }
1557
1558 static struct ref_sorting *ref_sorting;
1559 static int compare_refs(const void *a_, const void *b_)
1560 {
1561 struct ref_array_item *a = *((struct ref_array_item **)a_);
1562 struct ref_array_item *b = *((struct ref_array_item **)b_);
1563 struct ref_sorting *s;
1564
1565 for (s = ref_sorting; s; s = s->next) {
1566 int cmp = cmp_ref_sorting(s, a, b);
1567 if (cmp)
1568 return cmp;
1569 }
1570 return 0;
1571 }
1572
1573 void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
1574 {
1575 ref_sorting = sorting;
1576 qsort(array->items, array->nr, sizeof(struct ref_array_item *), compare_refs);
1577 }
1578
1579 static int hex1(char ch)
1580 {
1581 if ('0' <= ch && ch <= '9')
1582 return ch - '0';
1583 else if ('a' <= ch && ch <= 'f')
1584 return ch - 'a' + 10;
1585 else if ('A' <= ch && ch <= 'F')
1586 return ch - 'A' + 10;
1587 return -1;
1588 }
1589 static int hex2(const char *cp)
1590 {
1591 if (cp[0] && cp[1])
1592 return (hex1(cp[0]) << 4) | hex1(cp[1]);
1593 else
1594 return -1;
1595 }
1596
1597 static void append_literal(const char *cp, const char *ep, struct ref_formatting_state *state)
1598 {
1599 struct strbuf *s = &state->stack->output;
1600
1601 while (*cp && (!ep || cp < ep)) {
1602 if (*cp == '%') {
1603 if (cp[1] == '%')
1604 cp++;
1605 else {
1606 int ch = hex2(cp + 1);
1607 if (0 <= ch) {
1608 strbuf_addch(s, ch);
1609 cp += 3;
1610 continue;
1611 }
1612 }
1613 }
1614 strbuf_addch(s, *cp);
1615 cp++;
1616 }
1617 }
1618
1619 void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
1620 {
1621 const char *cp, *sp, *ep;
1622 struct strbuf *final_buf;
1623 struct ref_formatting_state state = REF_FORMATTING_STATE_INIT;
1624
1625 state.quote_style = quote_style;
1626 push_stack_element(&state.stack);
1627
1628 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
1629 struct atom_value *atomv;
1630
1631 ep = strchr(sp, ')');
1632 if (cp < sp)
1633 append_literal(cp, sp, &state);
1634 get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
1635 atomv->handler(atomv, &state);
1636 }
1637 if (*cp) {
1638 sp = cp + strlen(cp);
1639 append_literal(cp, sp, &state);
1640 }
1641 if (need_color_reset_at_eol) {
1642 struct atom_value resetv;
1643 char color[COLOR_MAXLEN] = "";
1644
1645 if (color_parse("reset", color) < 0)
1646 die("BUG: couldn't parse 'reset' as a color");
1647 resetv.s = color;
1648 append_atom(&resetv, &state);
1649 }
1650 if (state.stack->prev)
1651 die(_("format: %%(end) atom missing"));
1652 final_buf = &state.stack->output;
1653 fwrite(final_buf->buf, 1, final_buf->len, stdout);
1654 pop_stack_element(&state.stack);
1655 putchar('\n');
1656 }
1657
1658 /* If no sorting option is given, use refname to sort as default */
1659 struct ref_sorting *ref_default_sorting(void)
1660 {
1661 static const char cstr_name[] = "refname";
1662
1663 struct ref_sorting *sorting = xcalloc(1, sizeof(*sorting));
1664
1665 sorting->next = NULL;
1666 sorting->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
1667 return sorting;
1668 }
1669
1670 int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
1671 {
1672 struct ref_sorting **sorting_tail = opt->value;
1673 struct ref_sorting *s;
1674 int len;
1675
1676 if (!arg) /* should --no-sort void the list ? */
1677 return -1;
1678
1679 s = xcalloc(1, sizeof(*s));
1680 s->next = *sorting_tail;
1681 *sorting_tail = s;
1682
1683 if (*arg == '-') {
1684 s->reverse = 1;
1685 arg++;
1686 }
1687 if (skip_prefix(arg, "version:", &arg) ||
1688 skip_prefix(arg, "v:", &arg))
1689 s->version = 1;
1690 len = strlen(arg);
1691 s->atom = parse_ref_filter_atom(arg, arg+len);
1692 return 0;
1693 }
1694
1695 int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
1696 {
1697 struct ref_filter *rf = opt->value;
1698 unsigned char sha1[20];
1699
1700 rf->merge = starts_with(opt->long_name, "no")
1701 ? REF_FILTER_MERGED_OMIT
1702 : REF_FILTER_MERGED_INCLUDE;
1703
1704 if (get_sha1(arg, sha1))
1705 die(_("malformed object name %s"), arg);
1706
1707 rf->merge_commit = lookup_commit_reference_gently(sha1, 0);
1708 if (!rf->merge_commit)
1709 return opterror(opt, "must point to a commit", 0);
1710
1711 return 0;
1712 }
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