ref-filter: allow porcelain to translate messages in the output
[git/git.git] / ref-filter.c
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 #include "trailer.h"
17 #include "wt-status.h"
18
19 static struct ref_msg {
20 const char *gone;
21 const char *ahead;
22 const char *behind;
23 const char *ahead_behind;
24 } msgs = {
25 /* Untranslated plumbing messages: */
26 "gone",
27 "ahead %d",
28 "behind %d",
29 "ahead %d, behind %d"
30 };
31
32 void setup_ref_filter_porcelain_msg(void)
33 {
34 msgs.gone = _("gone");
35 msgs.ahead = _("ahead %d");
36 msgs.behind = _("behind %d");
37 msgs.ahead_behind = _("ahead %d, behind %d");
38 }
39
40 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
41 typedef enum { COMPARE_EQUAL, COMPARE_UNEQUAL, COMPARE_NONE } cmp_status;
42
43 struct align {
44 align_type position;
45 unsigned int width;
46 };
47
48 struct if_then_else {
49 cmp_status cmp_status;
50 const char *str;
51 unsigned int then_atom_seen : 1,
52 else_atom_seen : 1,
53 condition_satisfied : 1;
54 };
55
56 struct refname_atom {
57 enum { R_NORMAL, R_SHORT, R_LSTRIP, R_RSTRIP } option;
58 int lstrip, rstrip;
59 };
60
61 /*
62 * An atom is a valid field atom listed below, possibly prefixed with
63 * a "*" to denote deref_tag().
64 *
65 * We parse given format string and sort specifiers, and make a list
66 * of properties that we need to extract out of objects. ref_array_item
67 * structure will hold an array of values extracted that can be
68 * indexed with the "atom number", which is an index into this
69 * array.
70 */
71 static struct used_atom {
72 const char *name;
73 cmp_type type;
74 union {
75 char color[COLOR_MAXLEN];
76 struct align align;
77 struct {
78 enum { RR_REF, RR_TRACK, RR_TRACKSHORT } option;
79 struct refname_atom refname;
80 unsigned int nobracket : 1;
81 } remote_ref;
82 struct {
83 enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB, C_TRAILERS } option;
84 unsigned int nlines;
85 } contents;
86 struct {
87 cmp_status cmp_status;
88 const char *str;
89 } if_then_else;
90 struct {
91 enum { O_FULL, O_LENGTH, O_SHORT } option;
92 unsigned int length;
93 } objectname;
94 struct refname_atom refname;
95 } u;
96 } *used_atom;
97 static int used_atom_cnt, need_tagged, need_symref;
98 static int need_color_reset_at_eol;
99
100 static void color_atom_parser(struct used_atom *atom, const char *color_value)
101 {
102 if (!color_value)
103 die(_("expected format: %%(color:<color>)"));
104 if (color_parse(color_value, atom->u.color) < 0)
105 die(_("unrecognized color: %%(color:%s)"), color_value);
106 }
107
108 static void refname_atom_parser_internal(struct refname_atom *atom,
109 const char *arg, const char *name)
110 {
111 if (!arg)
112 atom->option = R_NORMAL;
113 else if (!strcmp(arg, "short"))
114 atom->option = R_SHORT;
115 else if (skip_prefix(arg, "lstrip=", &arg)) {
116 atom->option = R_LSTRIP;
117 if (strtol_i(arg, 10, &atom->lstrip))
118 die(_("Integer value expected refname:lstrip=%s"), arg);
119 } else if (skip_prefix(arg, "rstrip=", &arg)) {
120 atom->option = R_RSTRIP;
121 if (strtol_i(arg, 10, &atom->rstrip))
122 die(_("Integer value expected refname:rstrip=%s"), arg);
123 } else
124 die(_("unrecognized %%(%s) argument: %s"), name, arg);
125 }
126
127 static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
128 {
129 struct string_list params = STRING_LIST_INIT_DUP;
130 int i;
131
132 if (!arg) {
133 atom->u.remote_ref.option = RR_REF;
134 refname_atom_parser_internal(&atom->u.remote_ref.refname,
135 arg, atom->name);
136 return;
137 }
138
139 atom->u.remote_ref.nobracket = 0;
140 string_list_split(&params, arg, ',', -1);
141
142 for (i = 0; i < params.nr; i++) {
143 const char *s = params.items[i].string;
144
145 if (!strcmp(s, "track"))
146 atom->u.remote_ref.option = RR_TRACK;
147 else if (!strcmp(s, "trackshort"))
148 atom->u.remote_ref.option = RR_TRACKSHORT;
149 else if (!strcmp(s, "nobracket"))
150 atom->u.remote_ref.nobracket = 1;
151 else {
152 atom->u.remote_ref.option = RR_REF;
153 refname_atom_parser_internal(&atom->u.remote_ref.refname,
154 arg, atom->name);
155 }
156 }
157
158 string_list_clear(&params, 0);
159 }
160
161 static void body_atom_parser(struct used_atom *atom, const char *arg)
162 {
163 if (arg)
164 die(_("%%(body) does not take arguments"));
165 atom->u.contents.option = C_BODY_DEP;
166 }
167
168 static void subject_atom_parser(struct used_atom *atom, const char *arg)
169 {
170 if (arg)
171 die(_("%%(subject) does not take arguments"));
172 atom->u.contents.option = C_SUB;
173 }
174
175 static void trailers_atom_parser(struct used_atom *atom, const char *arg)
176 {
177 if (arg)
178 die(_("%%(trailers) does not take arguments"));
179 atom->u.contents.option = C_TRAILERS;
180 }
181
182 static void contents_atom_parser(struct used_atom *atom, const char *arg)
183 {
184 if (!arg)
185 atom->u.contents.option = C_BARE;
186 else if (!strcmp(arg, "body"))
187 atom->u.contents.option = C_BODY;
188 else if (!strcmp(arg, "signature"))
189 atom->u.contents.option = C_SIG;
190 else if (!strcmp(arg, "subject"))
191 atom->u.contents.option = C_SUB;
192 else if (!strcmp(arg, "trailers"))
193 atom->u.contents.option = C_TRAILERS;
194 else if (skip_prefix(arg, "lines=", &arg)) {
195 atom->u.contents.option = C_LINES;
196 if (strtoul_ui(arg, 10, &atom->u.contents.nlines))
197 die(_("positive value expected contents:lines=%s"), arg);
198 } else
199 die(_("unrecognized %%(contents) argument: %s"), arg);
200 }
201
202 static void objectname_atom_parser(struct used_atom *atom, const char *arg)
203 {
204 if (!arg)
205 atom->u.objectname.option = O_FULL;
206 else if (!strcmp(arg, "short"))
207 atom->u.objectname.option = O_SHORT;
208 else if (skip_prefix(arg, "short=", &arg)) {
209 atom->u.objectname.option = O_LENGTH;
210 if (strtoul_ui(arg, 10, &atom->u.objectname.length) ||
211 atom->u.objectname.length == 0)
212 die(_("positive value expected objectname:short=%s"), arg);
213 if (atom->u.objectname.length < MINIMUM_ABBREV)
214 atom->u.objectname.length = MINIMUM_ABBREV;
215 } else
216 die(_("unrecognized %%(objectname) argument: %s"), arg);
217 }
218
219 static void refname_atom_parser(struct used_atom *atom, const char *arg)
220 {
221 return refname_atom_parser_internal(&atom->u.refname, arg, atom->name);
222 }
223
224 static align_type parse_align_position(const char *s)
225 {
226 if (!strcmp(s, "right"))
227 return ALIGN_RIGHT;
228 else if (!strcmp(s, "middle"))
229 return ALIGN_MIDDLE;
230 else if (!strcmp(s, "left"))
231 return ALIGN_LEFT;
232 return -1;
233 }
234
235 static void align_atom_parser(struct used_atom *atom, const char *arg)
236 {
237 struct align *align = &atom->u.align;
238 struct string_list params = STRING_LIST_INIT_DUP;
239 int i;
240 unsigned int width = ~0U;
241
242 if (!arg)
243 die(_("expected format: %%(align:<width>,<position>)"));
244
245 align->position = ALIGN_LEFT;
246
247 string_list_split(&params, arg, ',', -1);
248 for (i = 0; i < params.nr; i++) {
249 const char *s = params.items[i].string;
250 int position;
251
252 if (skip_prefix(s, "position=", &s)) {
253 position = parse_align_position(s);
254 if (position < 0)
255 die(_("unrecognized position:%s"), s);
256 align->position = position;
257 } else if (skip_prefix(s, "width=", &s)) {
258 if (strtoul_ui(s, 10, &width))
259 die(_("unrecognized width:%s"), s);
260 } else if (!strtoul_ui(s, 10, &width))
261 ;
262 else if ((position = parse_align_position(s)) >= 0)
263 align->position = position;
264 else
265 die(_("unrecognized %%(align) argument: %s"), s);
266 }
267
268 if (width == ~0U)
269 die(_("positive width expected with the %%(align) atom"));
270 align->width = width;
271 string_list_clear(&params, 0);
272 }
273
274 static void if_atom_parser(struct used_atom *atom, const char *arg)
275 {
276 if (!arg) {
277 atom->u.if_then_else.cmp_status = COMPARE_NONE;
278 return;
279 } else if (skip_prefix(arg, "equals=", &atom->u.if_then_else.str)) {
280 atom->u.if_then_else.cmp_status = COMPARE_EQUAL;
281 } else if (skip_prefix(arg, "notequals=", &atom->u.if_then_else.str)) {
282 atom->u.if_then_else.cmp_status = COMPARE_UNEQUAL;
283 } else {
284 die(_("unrecognized %%(if) argument: %s"), arg);
285 }
286 }
287
288
289 static struct {
290 const char *name;
291 cmp_type cmp_type;
292 void (*parser)(struct used_atom *atom, const char *arg);
293 } valid_atom[] = {
294 { "refname" , FIELD_STR, refname_atom_parser },
295 { "objecttype" },
296 { "objectsize", FIELD_ULONG },
297 { "objectname", FIELD_STR, objectname_atom_parser },
298 { "tree" },
299 { "parent" },
300 { "numparent", FIELD_ULONG },
301 { "object" },
302 { "type" },
303 { "tag" },
304 { "author" },
305 { "authorname" },
306 { "authoremail" },
307 { "authordate", FIELD_TIME },
308 { "committer" },
309 { "committername" },
310 { "committeremail" },
311 { "committerdate", FIELD_TIME },
312 { "tagger" },
313 { "taggername" },
314 { "taggeremail" },
315 { "taggerdate", FIELD_TIME },
316 { "creator" },
317 { "creatordate", FIELD_TIME },
318 { "subject", FIELD_STR, subject_atom_parser },
319 { "body", FIELD_STR, body_atom_parser },
320 { "trailers", FIELD_STR, trailers_atom_parser },
321 { "contents", FIELD_STR, contents_atom_parser },
322 { "upstream", FIELD_STR, remote_ref_atom_parser },
323 { "push", FIELD_STR, remote_ref_atom_parser },
324 { "symref", FIELD_STR, refname_atom_parser },
325 { "flag" },
326 { "HEAD" },
327 { "color", FIELD_STR, color_atom_parser },
328 { "align", FIELD_STR, align_atom_parser },
329 { "end" },
330 { "if", FIELD_STR, if_atom_parser },
331 { "then" },
332 { "else" },
333 };
334
335 #define REF_FORMATTING_STATE_INIT { 0, NULL }
336
337 struct ref_formatting_stack {
338 struct ref_formatting_stack *prev;
339 struct strbuf output;
340 void (*at_end)(struct ref_formatting_stack **stack);
341 void *at_end_data;
342 };
343
344 struct ref_formatting_state {
345 int quote_style;
346 struct ref_formatting_stack *stack;
347 };
348
349 struct atom_value {
350 const char *s;
351 void (*handler)(struct atom_value *atomv, struct ref_formatting_state *state);
352 unsigned long ul; /* used for sorting when not FIELD_STR */
353 struct used_atom *atom;
354 };
355
356 /*
357 * Used to parse format string and sort specifiers
358 */
359 int parse_ref_filter_atom(const char *atom, const char *ep)
360 {
361 const char *sp;
362 const char *arg;
363 int i, at, atom_len;
364
365 sp = atom;
366 if (*sp == '*' && sp < ep)
367 sp++; /* deref */
368 if (ep <= sp)
369 die(_("malformed field name: %.*s"), (int)(ep-atom), atom);
370
371 /* Do we have the atom already used elsewhere? */
372 for (i = 0; i < used_atom_cnt; i++) {
373 int len = strlen(used_atom[i].name);
374 if (len == ep - atom && !memcmp(used_atom[i].name, atom, len))
375 return i;
376 }
377
378 /*
379 * If the atom name has a colon, strip it and everything after
380 * it off - it specifies the format for this entry, and
381 * shouldn't be used for checking against the valid_atom
382 * table.
383 */
384 arg = memchr(sp, ':', ep - sp);
385 atom_len = (arg ? arg : ep) - sp;
386
387 /* Is the atom a valid one? */
388 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
389 int len = strlen(valid_atom[i].name);
390 if (len == atom_len && !memcmp(valid_atom[i].name, sp, len))
391 break;
392 }
393
394 if (ARRAY_SIZE(valid_atom) <= i)
395 die(_("unknown field name: %.*s"), (int)(ep-atom), atom);
396
397 /* Add it in, including the deref prefix */
398 at = used_atom_cnt;
399 used_atom_cnt++;
400 REALLOC_ARRAY(used_atom, used_atom_cnt);
401 used_atom[at].name = xmemdupz(atom, ep - atom);
402 used_atom[at].type = valid_atom[i].cmp_type;
403 if (arg)
404 arg = used_atom[at].name + (arg - atom) + 1;
405 memset(&used_atom[at].u, 0, sizeof(used_atom[at].u));
406 if (valid_atom[i].parser)
407 valid_atom[i].parser(&used_atom[at], arg);
408 if (*atom == '*')
409 need_tagged = 1;
410 if (!strcmp(valid_atom[i].name, "symref"))
411 need_symref = 1;
412 return at;
413 }
414
415 static void quote_formatting(struct strbuf *s, const char *str, int quote_style)
416 {
417 switch (quote_style) {
418 case QUOTE_NONE:
419 strbuf_addstr(s, str);
420 break;
421 case QUOTE_SHELL:
422 sq_quote_buf(s, str);
423 break;
424 case QUOTE_PERL:
425 perl_quote_buf(s, str);
426 break;
427 case QUOTE_PYTHON:
428 python_quote_buf(s, str);
429 break;
430 case QUOTE_TCL:
431 tcl_quote_buf(s, str);
432 break;
433 }
434 }
435
436 static void append_atom(struct atom_value *v, struct ref_formatting_state *state)
437 {
438 /*
439 * Quote formatting is only done when the stack has a single
440 * element. Otherwise quote formatting is done on the
441 * element's entire output strbuf when the %(end) atom is
442 * encountered.
443 */
444 if (!state->stack->prev)
445 quote_formatting(&state->stack->output, v->s, state->quote_style);
446 else
447 strbuf_addstr(&state->stack->output, v->s);
448 }
449
450 static void push_stack_element(struct ref_formatting_stack **stack)
451 {
452 struct ref_formatting_stack *s = xcalloc(1, sizeof(struct ref_formatting_stack));
453
454 strbuf_init(&s->output, 0);
455 s->prev = *stack;
456 *stack = s;
457 }
458
459 static void pop_stack_element(struct ref_formatting_stack **stack)
460 {
461 struct ref_formatting_stack *current = *stack;
462 struct ref_formatting_stack *prev = current->prev;
463
464 if (prev)
465 strbuf_addbuf(&prev->output, &current->output);
466 strbuf_release(&current->output);
467 free(current);
468 *stack = prev;
469 }
470
471 static void end_align_handler(struct ref_formatting_stack **stack)
472 {
473 struct ref_formatting_stack *cur = *stack;
474 struct align *align = (struct align *)cur->at_end_data;
475 struct strbuf s = STRBUF_INIT;
476
477 strbuf_utf8_align(&s, align->position, align->width, cur->output.buf);
478 strbuf_swap(&cur->output, &s);
479 strbuf_release(&s);
480 }
481
482 static void align_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
483 {
484 struct ref_formatting_stack *new;
485
486 push_stack_element(&state->stack);
487 new = state->stack;
488 new->at_end = end_align_handler;
489 new->at_end_data = &atomv->atom->u.align;
490 }
491
492 static void if_then_else_handler(struct ref_formatting_stack **stack)
493 {
494 struct ref_formatting_stack *cur = *stack;
495 struct ref_formatting_stack *prev = cur->prev;
496 struct if_then_else *if_then_else = (struct if_then_else *)cur->at_end_data;
497
498 if (!if_then_else->then_atom_seen)
499 die(_("format: %%(if) atom used without a %%(then) atom"));
500
501 if (if_then_else->else_atom_seen) {
502 /*
503 * There is an %(else) atom: we need to drop one state from the
504 * stack, either the %(else) branch if the condition is satisfied, or
505 * the %(then) branch if it isn't.
506 */
507 if (if_then_else->condition_satisfied) {
508 strbuf_reset(&cur->output);
509 pop_stack_element(&cur);
510 } else {
511 strbuf_swap(&cur->output, &prev->output);
512 strbuf_reset(&cur->output);
513 pop_stack_element(&cur);
514 }
515 } else if (!if_then_else->condition_satisfied) {
516 /*
517 * No %(else) atom: just drop the %(then) branch if the
518 * condition is not satisfied.
519 */
520 strbuf_reset(&cur->output);
521 }
522
523 *stack = cur;
524 free(if_then_else);
525 }
526
527 static void if_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
528 {
529 struct ref_formatting_stack *new;
530 struct if_then_else *if_then_else = xcalloc(sizeof(struct if_then_else), 1);
531
532 if_then_else->str = atomv->atom->u.if_then_else.str;
533 if_then_else->cmp_status = atomv->atom->u.if_then_else.cmp_status;
534
535 push_stack_element(&state->stack);
536 new = state->stack;
537 new->at_end = if_then_else_handler;
538 new->at_end_data = if_then_else;
539 }
540
541 static int is_empty(const char *s)
542 {
543 while (*s != '\0') {
544 if (!isspace(*s))
545 return 0;
546 s++;
547 }
548 return 1;
549 }
550
551 static void then_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
552 {
553 struct ref_formatting_stack *cur = state->stack;
554 struct if_then_else *if_then_else = NULL;
555
556 if (cur->at_end == if_then_else_handler)
557 if_then_else = (struct if_then_else *)cur->at_end_data;
558 if (!if_then_else)
559 die(_("format: %%(then) atom used without an %%(if) atom"));
560 if (if_then_else->then_atom_seen)
561 die(_("format: %%(then) atom used more than once"));
562 if (if_then_else->else_atom_seen)
563 die(_("format: %%(then) atom used after %%(else)"));
564 if_then_else->then_atom_seen = 1;
565 /*
566 * If the 'equals' or 'notequals' attribute is used then
567 * perform the required comparison. If not, only non-empty
568 * strings satisfy the 'if' condition.
569 */
570 if (if_then_else->cmp_status == COMPARE_EQUAL) {
571 if (!strcmp(if_then_else->str, cur->output.buf))
572 if_then_else->condition_satisfied = 1;
573 } else if (if_then_else->cmp_status == COMPARE_UNEQUAL) {
574 if (strcmp(if_then_else->str, cur->output.buf))
575 if_then_else->condition_satisfied = 1;
576 } else if (cur->output.len && !is_empty(cur->output.buf))
577 if_then_else->condition_satisfied = 1;
578 strbuf_reset(&cur->output);
579 }
580
581 static void else_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
582 {
583 struct ref_formatting_stack *prev = state->stack;
584 struct if_then_else *if_then_else = NULL;
585
586 if (prev->at_end == if_then_else_handler)
587 if_then_else = (struct if_then_else *)prev->at_end_data;
588 if (!if_then_else)
589 die(_("format: %%(else) atom used without an %%(if) atom"));
590 if (!if_then_else->then_atom_seen)
591 die(_("format: %%(else) atom used without a %%(then) atom"));
592 if (if_then_else->else_atom_seen)
593 die(_("format: %%(else) atom used more than once"));
594 if_then_else->else_atom_seen = 1;
595 push_stack_element(&state->stack);
596 state->stack->at_end_data = prev->at_end_data;
597 state->stack->at_end = prev->at_end;
598 }
599
600 static void end_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
601 {
602 struct ref_formatting_stack *current = state->stack;
603 struct strbuf s = STRBUF_INIT;
604
605 if (!current->at_end)
606 die(_("format: %%(end) atom used without corresponding atom"));
607 current->at_end(&state->stack);
608
609 /* Stack may have been popped within at_end(), hence reset the current pointer */
610 current = state->stack;
611
612 /*
613 * Perform quote formatting when the stack element is that of
614 * a supporting atom. If nested then perform quote formatting
615 * only on the topmost supporting atom.
616 */
617 if (!current->prev->prev) {
618 quote_formatting(&s, current->output.buf, state->quote_style);
619 strbuf_swap(&current->output, &s);
620 }
621 strbuf_release(&s);
622 pop_stack_element(&state->stack);
623 }
624
625 /*
626 * In a format string, find the next occurrence of %(atom).
627 */
628 static const char *find_next(const char *cp)
629 {
630 while (*cp) {
631 if (*cp == '%') {
632 /*
633 * %( is the start of an atom;
634 * %% is a quoted per-cent.
635 */
636 if (cp[1] == '(')
637 return cp;
638 else if (cp[1] == '%')
639 cp++; /* skip over two % */
640 /* otherwise this is a singleton, literal % */
641 }
642 cp++;
643 }
644 return NULL;
645 }
646
647 /*
648 * Make sure the format string is well formed, and parse out
649 * the used atoms.
650 */
651 int verify_ref_format(const char *format)
652 {
653 const char *cp, *sp;
654
655 need_color_reset_at_eol = 0;
656 for (cp = format; *cp && (sp = find_next(cp)); ) {
657 const char *color, *ep = strchr(sp, ')');
658 int at;
659
660 if (!ep)
661 return error(_("malformed format string %s"), sp);
662 /* sp points at "%(" and ep points at the closing ")" */
663 at = parse_ref_filter_atom(sp + 2, ep);
664 cp = ep + 1;
665
666 if (skip_prefix(used_atom[at].name, "color:", &color))
667 need_color_reset_at_eol = !!strcmp(color, "reset");
668 }
669 return 0;
670 }
671
672 /*
673 * Given an object name, read the object data and size, and return a
674 * "struct object". If the object data we are returning is also borrowed
675 * by the "struct object" representation, set *eaten as well---it is a
676 * signal from parse_object_buffer to us not to free the buffer.
677 */
678 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
679 {
680 enum object_type type;
681 void *buf = read_sha1_file(sha1, &type, sz);
682
683 if (buf)
684 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
685 else
686 *obj = NULL;
687 return buf;
688 }
689
690 static int grab_objectname(const char *name, const unsigned char *sha1,
691 struct atom_value *v, struct used_atom *atom)
692 {
693 if (starts_with(name, "objectname")) {
694 if (atom->u.objectname.option == O_SHORT) {
695 v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
696 return 1;
697 } else if (atom->u.objectname.option == O_FULL) {
698 v->s = xstrdup(sha1_to_hex(sha1));
699 return 1;
700 } else if (atom->u.objectname.option == O_LENGTH) {
701 v->s = xstrdup(find_unique_abbrev(sha1, atom->u.objectname.length));
702 return 1;
703 } else
704 die("BUG: unknown %%(objectname) option");
705 }
706 return 0;
707 }
708
709 /* See grab_values */
710 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
711 {
712 int i;
713
714 for (i = 0; i < used_atom_cnt; i++) {
715 const char *name = used_atom[i].name;
716 struct atom_value *v = &val[i];
717 if (!!deref != (*name == '*'))
718 continue;
719 if (deref)
720 name++;
721 if (!strcmp(name, "objecttype"))
722 v->s = typename(obj->type);
723 else if (!strcmp(name, "objectsize")) {
724 v->ul = sz;
725 v->s = xstrfmt("%lu", sz);
726 }
727 else if (deref)
728 grab_objectname(name, obj->oid.hash, v, &used_atom[i]);
729 }
730 }
731
732 /* See grab_values */
733 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
734 {
735 int i;
736 struct tag *tag = (struct tag *) obj;
737
738 for (i = 0; i < used_atom_cnt; i++) {
739 const char *name = used_atom[i].name;
740 struct atom_value *v = &val[i];
741 if (!!deref != (*name == '*'))
742 continue;
743 if (deref)
744 name++;
745 if (!strcmp(name, "tag"))
746 v->s = tag->tag;
747 else if (!strcmp(name, "type") && tag->tagged)
748 v->s = typename(tag->tagged->type);
749 else if (!strcmp(name, "object") && tag->tagged)
750 v->s = xstrdup(oid_to_hex(&tag->tagged->oid));
751 }
752 }
753
754 /* See grab_values */
755 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
756 {
757 int i;
758 struct commit *commit = (struct commit *) obj;
759
760 for (i = 0; i < used_atom_cnt; i++) {
761 const char *name = used_atom[i].name;
762 struct atom_value *v = &val[i];
763 if (!!deref != (*name == '*'))
764 continue;
765 if (deref)
766 name++;
767 if (!strcmp(name, "tree")) {
768 v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
769 }
770 else if (!strcmp(name, "numparent")) {
771 v->ul = commit_list_count(commit->parents);
772 v->s = xstrfmt("%lu", v->ul);
773 }
774 else if (!strcmp(name, "parent")) {
775 struct commit_list *parents;
776 struct strbuf s = STRBUF_INIT;
777 for (parents = commit->parents; parents; parents = parents->next) {
778 struct commit *parent = parents->item;
779 if (parents != commit->parents)
780 strbuf_addch(&s, ' ');
781 strbuf_addstr(&s, oid_to_hex(&parent->object.oid));
782 }
783 v->s = strbuf_detach(&s, NULL);
784 }
785 }
786 }
787
788 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
789 {
790 const char *eol;
791 while (*buf) {
792 if (!strncmp(buf, who, wholen) &&
793 buf[wholen] == ' ')
794 return buf + wholen + 1;
795 eol = strchr(buf, '\n');
796 if (!eol)
797 return "";
798 eol++;
799 if (*eol == '\n')
800 return ""; /* end of header */
801 buf = eol;
802 }
803 return "";
804 }
805
806 static const char *copy_line(const char *buf)
807 {
808 const char *eol = strchrnul(buf, '\n');
809 return xmemdupz(buf, eol - buf);
810 }
811
812 static const char *copy_name(const char *buf)
813 {
814 const char *cp;
815 for (cp = buf; *cp && *cp != '\n'; cp++) {
816 if (!strncmp(cp, " <", 2))
817 return xmemdupz(buf, cp - buf);
818 }
819 return "";
820 }
821
822 static const char *copy_email(const char *buf)
823 {
824 const char *email = strchr(buf, '<');
825 const char *eoemail;
826 if (!email)
827 return "";
828 eoemail = strchr(email, '>');
829 if (!eoemail)
830 return "";
831 return xmemdupz(email, eoemail + 1 - email);
832 }
833
834 static char *copy_subject(const char *buf, unsigned long len)
835 {
836 char *r = xmemdupz(buf, len);
837 int i;
838
839 for (i = 0; i < len; i++)
840 if (r[i] == '\n')
841 r[i] = ' ';
842
843 return r;
844 }
845
846 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
847 {
848 const char *eoemail = strstr(buf, "> ");
849 char *zone;
850 unsigned long timestamp;
851 long tz;
852 struct date_mode date_mode = { DATE_NORMAL };
853 const char *formatp;
854
855 /*
856 * We got here because atomname ends in "date" or "date<something>";
857 * it's not possible that <something> is not ":<format>" because
858 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
859 * ":" means no format is specified, and use the default.
860 */
861 formatp = strchr(atomname, ':');
862 if (formatp != NULL) {
863 formatp++;
864 parse_date_format(formatp, &date_mode);
865 }
866
867 if (!eoemail)
868 goto bad;
869 timestamp = strtoul(eoemail + 2, &zone, 10);
870 if (timestamp == ULONG_MAX)
871 goto bad;
872 tz = strtol(zone, NULL, 10);
873 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
874 goto bad;
875 v->s = xstrdup(show_date(timestamp, tz, &date_mode));
876 v->ul = timestamp;
877 return;
878 bad:
879 v->s = "";
880 v->ul = 0;
881 }
882
883 /* See grab_values */
884 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
885 {
886 int i;
887 int wholen = strlen(who);
888 const char *wholine = NULL;
889
890 for (i = 0; i < used_atom_cnt; i++) {
891 const char *name = used_atom[i].name;
892 struct atom_value *v = &val[i];
893 if (!!deref != (*name == '*'))
894 continue;
895 if (deref)
896 name++;
897 if (strncmp(who, name, wholen))
898 continue;
899 if (name[wholen] != 0 &&
900 strcmp(name + wholen, "name") &&
901 strcmp(name + wholen, "email") &&
902 !starts_with(name + wholen, "date"))
903 continue;
904 if (!wholine)
905 wholine = find_wholine(who, wholen, buf, sz);
906 if (!wholine)
907 return; /* no point looking for it */
908 if (name[wholen] == 0)
909 v->s = copy_line(wholine);
910 else if (!strcmp(name + wholen, "name"))
911 v->s = copy_name(wholine);
912 else if (!strcmp(name + wholen, "email"))
913 v->s = copy_email(wholine);
914 else if (starts_with(name + wholen, "date"))
915 grab_date(wholine, v, name);
916 }
917
918 /*
919 * For a tag or a commit object, if "creator" or "creatordate" is
920 * requested, do something special.
921 */
922 if (strcmp(who, "tagger") && strcmp(who, "committer"))
923 return; /* "author" for commit object is not wanted */
924 if (!wholine)
925 wholine = find_wholine(who, wholen, buf, sz);
926 if (!wholine)
927 return;
928 for (i = 0; i < used_atom_cnt; i++) {
929 const char *name = used_atom[i].name;
930 struct atom_value *v = &val[i];
931 if (!!deref != (*name == '*'))
932 continue;
933 if (deref)
934 name++;
935
936 if (starts_with(name, "creatordate"))
937 grab_date(wholine, v, name);
938 else if (!strcmp(name, "creator"))
939 v->s = copy_line(wholine);
940 }
941 }
942
943 static void find_subpos(const char *buf, unsigned long sz,
944 const char **sub, unsigned long *sublen,
945 const char **body, unsigned long *bodylen,
946 unsigned long *nonsiglen,
947 const char **sig, unsigned long *siglen)
948 {
949 const char *eol;
950 /* skip past header until we hit empty line */
951 while (*buf && *buf != '\n') {
952 eol = strchrnul(buf, '\n');
953 if (*eol)
954 eol++;
955 buf = eol;
956 }
957 /* skip any empty lines */
958 while (*buf == '\n')
959 buf++;
960
961 /* parse signature first; we might not even have a subject line */
962 *sig = buf + parse_signature(buf, strlen(buf));
963 *siglen = strlen(*sig);
964
965 /* subject is first non-empty line */
966 *sub = buf;
967 /* subject goes to first empty line */
968 while (buf < *sig && *buf && *buf != '\n') {
969 eol = strchrnul(buf, '\n');
970 if (*eol)
971 eol++;
972 buf = eol;
973 }
974 *sublen = buf - *sub;
975 /* drop trailing newline, if present */
976 if (*sublen && (*sub)[*sublen - 1] == '\n')
977 *sublen -= 1;
978
979 /* skip any empty lines */
980 while (*buf == '\n')
981 buf++;
982 *body = buf;
983 *bodylen = strlen(buf);
984 *nonsiglen = *sig - buf;
985 }
986
987 /*
988 * If 'lines' is greater than 0, append that many lines from the given
989 * 'buf' of length 'size' to the given strbuf.
990 */
991 static void append_lines(struct strbuf *out, const char *buf, unsigned long size, int lines)
992 {
993 int i;
994 const char *sp, *eol;
995 size_t len;
996
997 sp = buf;
998
999 for (i = 0; i < lines && sp < buf + size; i++) {
1000 if (i)
1001 strbuf_addstr(out, "\n ");
1002 eol = memchr(sp, '\n', size - (sp - buf));
1003 len = eol ? eol - sp : size - (sp - buf);
1004 strbuf_add(out, sp, len);
1005 if (!eol)
1006 break;
1007 sp = eol + 1;
1008 }
1009 }
1010
1011 /* See grab_values */
1012 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
1013 {
1014 int i;
1015 const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
1016 unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
1017
1018 for (i = 0; i < used_atom_cnt; i++) {
1019 struct used_atom *atom = &used_atom[i];
1020 const char *name = atom->name;
1021 struct atom_value *v = &val[i];
1022 if (!!deref != (*name == '*'))
1023 continue;
1024 if (deref)
1025 name++;
1026 if (strcmp(name, "subject") &&
1027 strcmp(name, "body") &&
1028 strcmp(name, "trailers") &&
1029 !starts_with(name, "contents"))
1030 continue;
1031 if (!subpos)
1032 find_subpos(buf, sz,
1033 &subpos, &sublen,
1034 &bodypos, &bodylen, &nonsiglen,
1035 &sigpos, &siglen);
1036
1037 if (atom->u.contents.option == C_SUB)
1038 v->s = copy_subject(subpos, sublen);
1039 else if (atom->u.contents.option == C_BODY_DEP)
1040 v->s = xmemdupz(bodypos, bodylen);
1041 else if (atom->u.contents.option == C_BODY)
1042 v->s = xmemdupz(bodypos, nonsiglen);
1043 else if (atom->u.contents.option == C_SIG)
1044 v->s = xmemdupz(sigpos, siglen);
1045 else if (atom->u.contents.option == C_LINES) {
1046 struct strbuf s = STRBUF_INIT;
1047 const char *contents_end = bodylen + bodypos - siglen;
1048
1049 /* Size is the length of the message after removing the signature */
1050 append_lines(&s, subpos, contents_end - subpos, atom->u.contents.nlines);
1051 v->s = strbuf_detach(&s, NULL);
1052 } else if (atom->u.contents.option == C_TRAILERS) {
1053 struct trailer_info info;
1054
1055 /* Search for trailer info */
1056 trailer_info_get(&info, subpos);
1057 v->s = xmemdupz(info.trailer_start,
1058 info.trailer_end - info.trailer_start);
1059 trailer_info_release(&info);
1060 } else if (atom->u.contents.option == C_BARE)
1061 v->s = xstrdup(subpos);
1062 }
1063 }
1064
1065 /*
1066 * We want to have empty print-string for field requests
1067 * that do not apply (e.g. "authordate" for a tag object)
1068 */
1069 static void fill_missing_values(struct atom_value *val)
1070 {
1071 int i;
1072 for (i = 0; i < used_atom_cnt; i++) {
1073 struct atom_value *v = &val[i];
1074 if (v->s == NULL)
1075 v->s = "";
1076 }
1077 }
1078
1079 /*
1080 * val is a list of atom_value to hold returned values. Extract
1081 * the values for atoms in used_atom array out of (obj, buf, sz).
1082 * when deref is false, (obj, buf, sz) is the object that is
1083 * pointed at by the ref itself; otherwise it is the object the
1084 * ref (which is a tag) refers to.
1085 */
1086 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
1087 {
1088 grab_common_values(val, deref, obj, buf, sz);
1089 switch (obj->type) {
1090 case OBJ_TAG:
1091 grab_tag_values(val, deref, obj, buf, sz);
1092 grab_sub_body_contents(val, deref, obj, buf, sz);
1093 grab_person("tagger", val, deref, obj, buf, sz);
1094 break;
1095 case OBJ_COMMIT:
1096 grab_commit_values(val, deref, obj, buf, sz);
1097 grab_sub_body_contents(val, deref, obj, buf, sz);
1098 grab_person("author", val, deref, obj, buf, sz);
1099 grab_person("committer", val, deref, obj, buf, sz);
1100 break;
1101 case OBJ_TREE:
1102 /* grab_tree_values(val, deref, obj, buf, sz); */
1103 break;
1104 case OBJ_BLOB:
1105 /* grab_blob_values(val, deref, obj, buf, sz); */
1106 break;
1107 default:
1108 die("Eh? Object of type %d?", obj->type);
1109 }
1110 }
1111
1112 static inline char *copy_advance(char *dst, const char *src)
1113 {
1114 while (*src)
1115 *dst++ = *src++;
1116 return dst;
1117 }
1118
1119 static const char *lstrip_ref_components(const char *refname, int len)
1120 {
1121 long remaining = len;
1122 const char *start = refname;
1123
1124 if (len < 0) {
1125 int i;
1126 const char *p = refname;
1127
1128 /* Find total no of '/' separated path-components */
1129 for (i = 0; p[i]; p[i] == '/' ? i++ : *p++)
1130 ;
1131 /*
1132 * The number of components we need to strip is now
1133 * the total minus the components to be left (Plus one
1134 * because we count the number of '/', but the number
1135 * of components is one more than the no of '/').
1136 */
1137 remaining = i + len + 1;
1138 }
1139
1140 while (remaining > 0) {
1141 switch (*start++) {
1142 case '\0':
1143 return "";
1144 case '/':
1145 remaining--;
1146 break;
1147 }
1148 }
1149
1150 return start;
1151 }
1152
1153 static const char *rstrip_ref_components(const char *refname, int len)
1154 {
1155 long remaining = len;
1156 char *start = xstrdup(refname);
1157
1158 if (len < 0) {
1159 int i;
1160 const char *p = refname;
1161
1162 /* Find total no of '/' separated path-components */
1163 for (i = 0; p[i]; p[i] == '/' ? i++ : *p++)
1164 ;
1165 /*
1166 * The number of components we need to strip is now
1167 * the total minus the components to be left (Plus one
1168 * because we count the number of '/', but the number
1169 * of components is one more than the no of '/').
1170 */
1171 remaining = i + len + 1;
1172 }
1173
1174 while (remaining-- > 0) {
1175 char *p = strrchr(start, '/');
1176 if (p == NULL)
1177 return "";
1178 else
1179 p[0] = '\0';
1180 }
1181 return start;
1182 }
1183
1184 static const char *show_ref(struct refname_atom *atom, const char *refname)
1185 {
1186 if (atom->option == R_SHORT)
1187 return shorten_unambiguous_ref(refname, warn_ambiguous_refs);
1188 else if (atom->option == R_LSTRIP)
1189 return lstrip_ref_components(refname, atom->lstrip);
1190 else if (atom->option == R_RSTRIP)
1191 return rstrip_ref_components(refname, atom->rstrip);
1192 else
1193 return refname;
1194 }
1195
1196 static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
1197 struct branch *branch, const char **s)
1198 {
1199 int num_ours, num_theirs;
1200 if (atom->u.remote_ref.option == RR_REF)
1201 *s = show_ref(&atom->u.remote_ref.refname, refname);
1202 else if (atom->u.remote_ref.option == RR_TRACK) {
1203 if (stat_tracking_info(branch, &num_ours,
1204 &num_theirs, NULL)) {
1205 *s = xstrdup(msgs.gone);
1206 } else if (!num_ours && !num_theirs)
1207 *s = "";
1208 else if (!num_ours)
1209 *s = xstrfmt(msgs.behind, num_theirs);
1210 else if (!num_theirs)
1211 *s = xstrfmt(msgs.ahead, num_ours);
1212 else
1213 *s = xstrfmt(msgs.ahead_behind,
1214 num_ours, num_theirs);
1215 if (!atom->u.remote_ref.nobracket && *s[0]) {
1216 const char *to_free = *s;
1217 *s = xstrfmt("[%s]", *s);
1218 free((void *)to_free);
1219 }
1220 } else if (atom->u.remote_ref.option == RR_TRACKSHORT) {
1221 if (stat_tracking_info(branch, &num_ours,
1222 &num_theirs, NULL))
1223 return;
1224
1225 if (!num_ours && !num_theirs)
1226 *s = "=";
1227 else if (!num_ours)
1228 *s = "<";
1229 else if (!num_theirs)
1230 *s = ">";
1231 else
1232 *s = "<>";
1233 } else
1234 die("BUG: unhandled RR_* enum");
1235 }
1236
1237 char *get_head_description(void)
1238 {
1239 struct strbuf desc = STRBUF_INIT;
1240 struct wt_status_state state;
1241 memset(&state, 0, sizeof(state));
1242 wt_status_get_state(&state, 1);
1243 if (state.rebase_in_progress ||
1244 state.rebase_interactive_in_progress)
1245 strbuf_addf(&desc, _("(no branch, rebasing %s)"),
1246 state.branch);
1247 else if (state.bisect_in_progress)
1248 strbuf_addf(&desc, _("(no branch, bisect started on %s)"),
1249 state.branch);
1250 else if (state.detached_from) {
1251 /* TRANSLATORS: make sure these match _("HEAD detached at ")
1252 and _("HEAD detached from ") in wt-status.c */
1253 if (state.detached_at)
1254 strbuf_addf(&desc, _("(HEAD detached at %s)"),
1255 state.detached_from);
1256 else
1257 strbuf_addf(&desc, _("(HEAD detached from %s)"),
1258 state.detached_from);
1259 }
1260 else
1261 strbuf_addstr(&desc, _("(no branch)"));
1262 free(state.branch);
1263 free(state.onto);
1264 free(state.detached_from);
1265 return strbuf_detach(&desc, NULL);
1266 }
1267
1268 static const char *get_symref(struct used_atom *atom, struct ref_array_item *ref)
1269 {
1270 if (!ref->symref)
1271 return "";
1272 else
1273 return show_ref(&atom->u.refname, ref->symref);
1274 }
1275
1276 static const char *get_refname(struct used_atom *atom, struct ref_array_item *ref)
1277 {
1278 if (ref->kind & FILTER_REFS_DETACHED_HEAD)
1279 return get_head_description();
1280 return show_ref(&atom->u.refname, ref->refname);
1281 }
1282
1283 /*
1284 * Parse the object referred by ref, and grab needed value.
1285 */
1286 static void populate_value(struct ref_array_item *ref)
1287 {
1288 void *buf;
1289 struct object *obj;
1290 int eaten, i;
1291 unsigned long size;
1292 const unsigned char *tagged;
1293
1294 ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
1295
1296 if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
1297 unsigned char unused1[20];
1298 ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
1299 unused1, NULL);
1300 if (!ref->symref)
1301 ref->symref = "";
1302 }
1303
1304 /* Fill in specials first */
1305 for (i = 0; i < used_atom_cnt; i++) {
1306 struct used_atom *atom = &used_atom[i];
1307 const char *name = used_atom[i].name;
1308 struct atom_value *v = &ref->value[i];
1309 int deref = 0;
1310 const char *refname;
1311 struct branch *branch = NULL;
1312
1313 v->handler = append_atom;
1314 v->atom = atom;
1315
1316 if (*name == '*') {
1317 deref = 1;
1318 name++;
1319 }
1320
1321 if (starts_with(name, "refname"))
1322 refname = get_refname(atom, ref);
1323 else if (starts_with(name, "symref"))
1324 refname = get_symref(atom, ref);
1325 else if (starts_with(name, "upstream")) {
1326 const char *branch_name;
1327 /* only local branches may have an upstream */
1328 if (!skip_prefix(ref->refname, "refs/heads/",
1329 &branch_name))
1330 continue;
1331 branch = branch_get(branch_name);
1332
1333 refname = branch_get_upstream(branch, NULL);
1334 if (refname)
1335 fill_remote_ref_details(atom, refname, branch, &v->s);
1336 continue;
1337 } else if (starts_with(name, "push")) {
1338 const char *branch_name;
1339 if (!skip_prefix(ref->refname, "refs/heads/",
1340 &branch_name))
1341 continue;
1342 branch = branch_get(branch_name);
1343
1344 refname = branch_get_push(branch, NULL);
1345 if (!refname)
1346 continue;
1347 fill_remote_ref_details(atom, refname, branch, &v->s);
1348 continue;
1349 } else if (starts_with(name, "color:")) {
1350 v->s = atom->u.color;
1351 continue;
1352 } else if (!strcmp(name, "flag")) {
1353 char buf[256], *cp = buf;
1354 if (ref->flag & REF_ISSYMREF)
1355 cp = copy_advance(cp, ",symref");
1356 if (ref->flag & REF_ISPACKED)
1357 cp = copy_advance(cp, ",packed");
1358 if (cp == buf)
1359 v->s = "";
1360 else {
1361 *cp = '\0';
1362 v->s = xstrdup(buf + 1);
1363 }
1364 continue;
1365 } else if (!deref && grab_objectname(name, ref->objectname, v, atom)) {
1366 continue;
1367 } else if (!strcmp(name, "HEAD")) {
1368 const char *head;
1369 unsigned char sha1[20];
1370
1371 head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
1372 sha1, NULL);
1373 if (head && !strcmp(ref->refname, head))
1374 v->s = "*";
1375 else
1376 v->s = " ";
1377 continue;
1378 } else if (starts_with(name, "align")) {
1379 v->handler = align_atom_handler;
1380 continue;
1381 } else if (!strcmp(name, "end")) {
1382 v->handler = end_atom_handler;
1383 continue;
1384 } else if (starts_with(name, "if")) {
1385 const char *s;
1386
1387 if (skip_prefix(name, "if:", &s))
1388 v->s = xstrdup(s);
1389 v->handler = if_atom_handler;
1390 continue;
1391 } else if (!strcmp(name, "then")) {
1392 v->handler = then_atom_handler;
1393 continue;
1394 } else if (!strcmp(name, "else")) {
1395 v->handler = else_atom_handler;
1396 continue;
1397 } else
1398 continue;
1399
1400 if (!deref)
1401 v->s = refname;
1402 else
1403 v->s = xstrfmt("%s^{}", refname);
1404 }
1405
1406 for (i = 0; i < used_atom_cnt; i++) {
1407 struct atom_value *v = &ref->value[i];
1408 if (v->s == NULL)
1409 goto need_obj;
1410 }
1411 return;
1412
1413 need_obj:
1414 buf = get_obj(ref->objectname, &obj, &size, &eaten);
1415 if (!buf)
1416 die(_("missing object %s for %s"),
1417 sha1_to_hex(ref->objectname), ref->refname);
1418 if (!obj)
1419 die(_("parse_object_buffer failed on %s for %s"),
1420 sha1_to_hex(ref->objectname), ref->refname);
1421
1422 grab_values(ref->value, 0, obj, buf, size);
1423 if (!eaten)
1424 free(buf);
1425
1426 /*
1427 * If there is no atom that wants to know about tagged
1428 * object, we are done.
1429 */
1430 if (!need_tagged || (obj->type != OBJ_TAG))
1431 return;
1432
1433 /*
1434 * If it is a tag object, see if we use a value that derefs
1435 * the object, and if we do grab the object it refers to.
1436 */
1437 tagged = ((struct tag *)obj)->tagged->oid.hash;
1438
1439 /*
1440 * NEEDSWORK: This derefs tag only once, which
1441 * is good to deal with chains of trust, but
1442 * is not consistent with what deref_tag() does
1443 * which peels the onion to the core.
1444 */
1445 buf = get_obj(tagged, &obj, &size, &eaten);
1446 if (!buf)
1447 die(_("missing object %s for %s"),
1448 sha1_to_hex(tagged), ref->refname);
1449 if (!obj)
1450 die(_("parse_object_buffer failed on %s for %s"),
1451 sha1_to_hex(tagged), ref->refname);
1452 grab_values(ref->value, 1, obj, buf, size);
1453 if (!eaten)
1454 free(buf);
1455 }
1456
1457 /*
1458 * Given a ref, return the value for the atom. This lazily gets value
1459 * out of the object by calling populate value.
1460 */
1461 static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
1462 {
1463 if (!ref->value) {
1464 populate_value(ref);
1465 fill_missing_values(ref->value);
1466 }
1467 *v = &ref->value[atom];
1468 }
1469
1470 enum contains_result {
1471 CONTAINS_UNKNOWN = -1,
1472 CONTAINS_NO = 0,
1473 CONTAINS_YES = 1
1474 };
1475
1476 /*
1477 * Mimicking the real stack, this stack lives on the heap, avoiding stack
1478 * overflows.
1479 *
1480 * At each recursion step, the stack items points to the commits whose
1481 * ancestors are to be inspected.
1482 */
1483 struct contains_stack {
1484 int nr, alloc;
1485 struct contains_stack_entry {
1486 struct commit *commit;
1487 struct commit_list *parents;
1488 } *contains_stack;
1489 };
1490
1491 static int in_commit_list(const struct commit_list *want, struct commit *c)
1492 {
1493 for (; want; want = want->next)
1494 if (!oidcmp(&want->item->object.oid, &c->object.oid))
1495 return 1;
1496 return 0;
1497 }
1498
1499 /*
1500 * Test whether the candidate or one of its parents is contained in the list.
1501 * Do not recurse to find out, though, but return -1 if inconclusive.
1502 */
1503 static enum contains_result contains_test(struct commit *candidate,
1504 const struct commit_list *want)
1505 {
1506 /* was it previously marked as containing a want commit? */
1507 if (candidate->object.flags & TMP_MARK)
1508 return 1;
1509 /* or marked as not possibly containing a want commit? */
1510 if (candidate->object.flags & UNINTERESTING)
1511 return 0;
1512 /* or are we it? */
1513 if (in_commit_list(want, candidate)) {
1514 candidate->object.flags |= TMP_MARK;
1515 return 1;
1516 }
1517
1518 if (parse_commit(candidate) < 0)
1519 return 0;
1520
1521 return -1;
1522 }
1523
1524 static void push_to_contains_stack(struct commit *candidate, struct contains_stack *contains_stack)
1525 {
1526 ALLOC_GROW(contains_stack->contains_stack, contains_stack->nr + 1, contains_stack->alloc);
1527 contains_stack->contains_stack[contains_stack->nr].commit = candidate;
1528 contains_stack->contains_stack[contains_stack->nr++].parents = candidate->parents;
1529 }
1530
1531 static enum contains_result contains_tag_algo(struct commit *candidate,
1532 const struct commit_list *want)
1533 {
1534 struct contains_stack contains_stack = { 0, 0, NULL };
1535 int result = contains_test(candidate, want);
1536
1537 if (result != CONTAINS_UNKNOWN)
1538 return result;
1539
1540 push_to_contains_stack(candidate, &contains_stack);
1541 while (contains_stack.nr) {
1542 struct contains_stack_entry *entry = &contains_stack.contains_stack[contains_stack.nr - 1];
1543 struct commit *commit = entry->commit;
1544 struct commit_list *parents = entry->parents;
1545
1546 if (!parents) {
1547 commit->object.flags |= UNINTERESTING;
1548 contains_stack.nr--;
1549 }
1550 /*
1551 * If we just popped the stack, parents->item has been marked,
1552 * therefore contains_test will return a meaningful 0 or 1.
1553 */
1554 else switch (contains_test(parents->item, want)) {
1555 case CONTAINS_YES:
1556 commit->object.flags |= TMP_MARK;
1557 contains_stack.nr--;
1558 break;
1559 case CONTAINS_NO:
1560 entry->parents = parents->next;
1561 break;
1562 case CONTAINS_UNKNOWN:
1563 push_to_contains_stack(parents->item, &contains_stack);
1564 break;
1565 }
1566 }
1567 free(contains_stack.contains_stack);
1568 return contains_test(candidate, want);
1569 }
1570
1571 static int commit_contains(struct ref_filter *filter, struct commit *commit)
1572 {
1573 if (filter->with_commit_tag_algo)
1574 return contains_tag_algo(commit, filter->with_commit);
1575 return is_descendant_of(commit, filter->with_commit);
1576 }
1577
1578 /*
1579 * Return 1 if the refname matches one of the patterns, otherwise 0.
1580 * A pattern can be a literal prefix (e.g. a refname "refs/heads/master"
1581 * matches a pattern "refs/heads/mas") or a wildcard (e.g. the same ref
1582 * matches "refs/heads/mas*", too).
1583 */
1584 static int match_pattern(const struct ref_filter *filter, const char *refname)
1585 {
1586 const char **patterns = filter->name_patterns;
1587 unsigned flags = 0;
1588
1589 if (filter->ignore_case)
1590 flags |= WM_CASEFOLD;
1591
1592 /*
1593 * When no '--format' option is given we need to skip the prefix
1594 * for matching refs of tags and branches.
1595 */
1596 (void)(skip_prefix(refname, "refs/tags/", &refname) ||
1597 skip_prefix(refname, "refs/heads/", &refname) ||
1598 skip_prefix(refname, "refs/remotes/", &refname) ||
1599 skip_prefix(refname, "refs/", &refname));
1600
1601 for (; *patterns; patterns++) {
1602 if (!wildmatch(*patterns, refname, flags, NULL))
1603 return 1;
1604 }
1605 return 0;
1606 }
1607
1608 /*
1609 * Return 1 if the refname matches one of the patterns, otherwise 0.
1610 * A pattern can be path prefix (e.g. a refname "refs/heads/master"
1611 * matches a pattern "refs/heads/" but not "refs/heads/m") or a
1612 * wildcard (e.g. the same ref matches "refs/heads/m*", too).
1613 */
1614 static int match_name_as_path(const struct ref_filter *filter, const char *refname)
1615 {
1616 const char **pattern = filter->name_patterns;
1617 int namelen = strlen(refname);
1618 unsigned flags = WM_PATHNAME;
1619
1620 if (filter->ignore_case)
1621 flags |= WM_CASEFOLD;
1622
1623 for (; *pattern; pattern++) {
1624 const char *p = *pattern;
1625 int plen = strlen(p);
1626
1627 if ((plen <= namelen) &&
1628 !strncmp(refname, p, plen) &&
1629 (refname[plen] == '\0' ||
1630 refname[plen] == '/' ||
1631 p[plen-1] == '/'))
1632 return 1;
1633 if (!wildmatch(p, refname, WM_PATHNAME, NULL))
1634 return 1;
1635 }
1636 return 0;
1637 }
1638
1639 /* Return 1 if the refname matches one of the patterns, otherwise 0. */
1640 static int filter_pattern_match(struct ref_filter *filter, const char *refname)
1641 {
1642 if (!*filter->name_patterns)
1643 return 1; /* No pattern always matches */
1644 if (filter->match_as_path)
1645 return match_name_as_path(filter, refname);
1646 return match_pattern(filter, refname);
1647 }
1648
1649 /*
1650 * Given a ref (sha1, refname), check if the ref belongs to the array
1651 * of sha1s. If the given ref is a tag, check if the given tag points
1652 * at one of the sha1s in the given sha1 array.
1653 * the given sha1_array.
1654 * NEEDSWORK:
1655 * 1. Only a single level of inderection is obtained, we might want to
1656 * change this to account for multiple levels (e.g. annotated tags
1657 * pointing to annotated tags pointing to a commit.)
1658 * 2. As the refs are cached we might know what refname peels to without
1659 * the need to parse the object via parse_object(). peel_ref() might be a
1660 * more efficient alternative to obtain the pointee.
1661 */
1662 static const unsigned char *match_points_at(struct sha1_array *points_at,
1663 const unsigned char *sha1,
1664 const char *refname)
1665 {
1666 const unsigned char *tagged_sha1 = NULL;
1667 struct object *obj;
1668
1669 if (sha1_array_lookup(points_at, sha1) >= 0)
1670 return sha1;
1671 obj = parse_object(sha1);
1672 if (!obj)
1673 die(_("malformed object at '%s'"), refname);
1674 if (obj->type == OBJ_TAG)
1675 tagged_sha1 = ((struct tag *)obj)->tagged->oid.hash;
1676 if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
1677 return tagged_sha1;
1678 return NULL;
1679 }
1680
1681 /* Allocate space for a new ref_array_item and copy the objectname and flag to it */
1682 static struct ref_array_item *new_ref_array_item(const char *refname,
1683 const unsigned char *objectname,
1684 int flag)
1685 {
1686 struct ref_array_item *ref;
1687 FLEX_ALLOC_STR(ref, refname, refname);
1688 hashcpy(ref->objectname, objectname);
1689 ref->flag = flag;
1690
1691 return ref;
1692 }
1693
1694 static int filter_ref_kind(struct ref_filter *filter, const char *refname)
1695 {
1696 unsigned int i;
1697
1698 static struct {
1699 const char *prefix;
1700 unsigned int kind;
1701 } ref_kind[] = {
1702 { "refs/heads/" , FILTER_REFS_BRANCHES },
1703 { "refs/remotes/" , FILTER_REFS_REMOTES },
1704 { "refs/tags/", FILTER_REFS_TAGS}
1705 };
1706
1707 if (filter->kind == FILTER_REFS_BRANCHES ||
1708 filter->kind == FILTER_REFS_REMOTES ||
1709 filter->kind == FILTER_REFS_TAGS)
1710 return filter->kind;
1711 else if (!strcmp(refname, "HEAD"))
1712 return FILTER_REFS_DETACHED_HEAD;
1713
1714 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
1715 if (starts_with(refname, ref_kind[i].prefix))
1716 return ref_kind[i].kind;
1717 }
1718
1719 return FILTER_REFS_OTHERS;
1720 }
1721
1722 /*
1723 * A call-back given to for_each_ref(). Filter refs and keep them for
1724 * later object processing.
1725 */
1726 static int ref_filter_handler(const char *refname, const struct object_id *oid, int flag, void *cb_data)
1727 {
1728 struct ref_filter_cbdata *ref_cbdata = cb_data;
1729 struct ref_filter *filter = ref_cbdata->filter;
1730 struct ref_array_item *ref;
1731 struct commit *commit = NULL;
1732 unsigned int kind;
1733
1734 if (flag & REF_BAD_NAME) {
1735 warning(_("ignoring ref with broken name %s"), refname);
1736 return 0;
1737 }
1738
1739 if (flag & REF_ISBROKEN) {
1740 warning(_("ignoring broken ref %s"), refname);
1741 return 0;
1742 }
1743
1744 /* Obtain the current ref kind from filter_ref_kind() and ignore unwanted refs. */
1745 kind = filter_ref_kind(filter, refname);
1746 if (!(kind & filter->kind))
1747 return 0;
1748
1749 if (!filter_pattern_match(filter, refname))
1750 return 0;
1751
1752 if (filter->points_at.nr && !match_points_at(&filter->points_at, oid->hash, refname))
1753 return 0;
1754
1755 /*
1756 * A merge filter is applied on refs pointing to commits. Hence
1757 * obtain the commit using the 'oid' available and discard all
1758 * non-commits early. The actual filtering is done later.
1759 */
1760 if (filter->merge_commit || filter->with_commit || filter->verbose) {
1761 commit = lookup_commit_reference_gently(oid->hash, 1);
1762 if (!commit)
1763 return 0;
1764 /* We perform the filtering for the '--contains' option */
1765 if (filter->with_commit &&
1766 !commit_contains(filter, commit))
1767 return 0;
1768 }
1769
1770 /*
1771 * We do not open the object yet; sort may only need refname
1772 * to do its job and the resulting list may yet to be pruned
1773 * by maxcount logic.
1774 */
1775 ref = new_ref_array_item(refname, oid->hash, flag);
1776 ref->commit = commit;
1777
1778 REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
1779 ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
1780 ref->kind = kind;
1781 return 0;
1782 }
1783
1784 /* Free memory allocated for a ref_array_item */
1785 static void free_array_item(struct ref_array_item *item)
1786 {
1787 free((char *)item->symref);
1788 free(item);
1789 }
1790
1791 /* Free all memory allocated for ref_array */
1792 void ref_array_clear(struct ref_array *array)
1793 {
1794 int i;
1795
1796 for (i = 0; i < array->nr; i++)
1797 free_array_item(array->items[i]);
1798 free(array->items);
1799 array->items = NULL;
1800 array->nr = array->alloc = 0;
1801 }
1802
1803 static void do_merge_filter(struct ref_filter_cbdata *ref_cbdata)
1804 {
1805 struct rev_info revs;
1806 int i, old_nr;
1807 struct ref_filter *filter = ref_cbdata->filter;
1808 struct ref_array *array = ref_cbdata->array;
1809 struct commit **to_clear = xcalloc(sizeof(struct commit *), array->nr);
1810
1811 init_revisions(&revs, NULL);
1812
1813 for (i = 0; i < array->nr; i++) {
1814 struct ref_array_item *item = array->items[i];
1815 add_pending_object(&revs, &item->commit->object, item->refname);
1816 to_clear[i] = item->commit;
1817 }
1818
1819 filter->merge_commit->object.flags |= UNINTERESTING;
1820 add_pending_object(&revs, &filter->merge_commit->object, "");
1821
1822 revs.limited = 1;
1823 if (prepare_revision_walk(&revs))
1824 die(_("revision walk setup failed"));
1825
1826 old_nr = array->nr;
1827 array->nr = 0;
1828
1829 for (i = 0; i < old_nr; i++) {
1830 struct ref_array_item *item = array->items[i];
1831 struct commit *commit = item->commit;
1832
1833 int is_merged = !!(commit->object.flags & UNINTERESTING);
1834
1835 if (is_merged == (filter->merge == REF_FILTER_MERGED_INCLUDE))
1836 array->items[array->nr++] = array->items[i];
1837 else
1838 free_array_item(item);
1839 }
1840
1841 for (i = 0; i < old_nr; i++)
1842 clear_commit_marks(to_clear[i], ALL_REV_FLAGS);
1843 clear_commit_marks(filter->merge_commit, ALL_REV_FLAGS);
1844 free(to_clear);
1845 }
1846
1847 /*
1848 * API for filtering a set of refs. Based on the type of refs the user
1849 * has requested, we iterate through those refs and apply filters
1850 * as per the given ref_filter structure and finally store the
1851 * filtered refs in the ref_array structure.
1852 */
1853 int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int type)
1854 {
1855 struct ref_filter_cbdata ref_cbdata;
1856 int ret = 0;
1857 unsigned int broken = 0;
1858
1859 ref_cbdata.array = array;
1860 ref_cbdata.filter = filter;
1861
1862 if (type & FILTER_REFS_INCLUDE_BROKEN)
1863 broken = 1;
1864 filter->kind = type & FILTER_REFS_KIND_MASK;
1865
1866 /* Simple per-ref filtering */
1867 if (!filter->kind)
1868 die("filter_refs: invalid type");
1869 else {
1870 /*
1871 * For common cases where we need only branches or remotes or tags,
1872 * we only iterate through those refs. If a mix of refs is needed,
1873 * we iterate over all refs and filter out required refs with the help
1874 * of filter_ref_kind().
1875 */
1876 if (filter->kind == FILTER_REFS_BRANCHES)
1877 ret = for_each_fullref_in("refs/heads/", ref_filter_handler, &ref_cbdata, broken);
1878 else if (filter->kind == FILTER_REFS_REMOTES)
1879 ret = for_each_fullref_in("refs/remotes/", ref_filter_handler, &ref_cbdata, broken);
1880 else if (filter->kind == FILTER_REFS_TAGS)
1881 ret = for_each_fullref_in("refs/tags/", ref_filter_handler, &ref_cbdata, broken);
1882 else if (filter->kind & FILTER_REFS_ALL)
1883 ret = for_each_fullref_in("", ref_filter_handler, &ref_cbdata, broken);
1884 if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
1885 head_ref(ref_filter_handler, &ref_cbdata);
1886 }
1887
1888
1889 /* Filters that need revision walking */
1890 if (filter->merge_commit)
1891 do_merge_filter(&ref_cbdata);
1892
1893 return ret;
1894 }
1895
1896 static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
1897 {
1898 struct atom_value *va, *vb;
1899 int cmp;
1900 cmp_type cmp_type = used_atom[s->atom].type;
1901 int (*cmp_fn)(const char *, const char *);
1902
1903 get_ref_atom_value(a, s->atom, &va);
1904 get_ref_atom_value(b, s->atom, &vb);
1905 cmp_fn = s->ignore_case ? strcasecmp : strcmp;
1906 if (s->version)
1907 cmp = versioncmp(va->s, vb->s);
1908 else if (cmp_type == FIELD_STR)
1909 cmp = cmp_fn(va->s, vb->s);
1910 else {
1911 if (va->ul < vb->ul)
1912 cmp = -1;
1913 else if (va->ul == vb->ul)
1914 cmp = cmp_fn(a->refname, b->refname);
1915 else
1916 cmp = 1;
1917 }
1918
1919 return (s->reverse) ? -cmp : cmp;
1920 }
1921
1922 static struct ref_sorting *ref_sorting;
1923 static int compare_refs(const void *a_, const void *b_)
1924 {
1925 struct ref_array_item *a = *((struct ref_array_item **)a_);
1926 struct ref_array_item *b = *((struct ref_array_item **)b_);
1927 struct ref_sorting *s;
1928
1929 for (s = ref_sorting; s; s = s->next) {
1930 int cmp = cmp_ref_sorting(s, a, b);
1931 if (cmp)
1932 return cmp;
1933 }
1934 return 0;
1935 }
1936
1937 void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
1938 {
1939 ref_sorting = sorting;
1940 QSORT(array->items, array->nr, compare_refs);
1941 }
1942
1943 static void append_literal(const char *cp, const char *ep, struct ref_formatting_state *state)
1944 {
1945 struct strbuf *s = &state->stack->output;
1946
1947 while (*cp && (!ep || cp < ep)) {
1948 if (*cp == '%') {
1949 if (cp[1] == '%')
1950 cp++;
1951 else {
1952 int ch = hex2chr(cp + 1);
1953 if (0 <= ch) {
1954 strbuf_addch(s, ch);
1955 cp += 3;
1956 continue;
1957 }
1958 }
1959 }
1960 strbuf_addch(s, *cp);
1961 cp++;
1962 }
1963 }
1964
1965 void format_ref_array_item(struct ref_array_item *info, const char *format,
1966 int quote_style, struct strbuf *final_buf)
1967 {
1968 const char *cp, *sp, *ep;
1969 struct ref_formatting_state state = REF_FORMATTING_STATE_INIT;
1970
1971 state.quote_style = quote_style;
1972 push_stack_element(&state.stack);
1973
1974 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
1975 struct atom_value *atomv;
1976
1977 ep = strchr(sp, ')');
1978 if (cp < sp)
1979 append_literal(cp, sp, &state);
1980 get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
1981 atomv->handler(atomv, &state);
1982 }
1983 if (*cp) {
1984 sp = cp + strlen(cp);
1985 append_literal(cp, sp, &state);
1986 }
1987 if (need_color_reset_at_eol) {
1988 struct atom_value resetv;
1989 char color[COLOR_MAXLEN] = "";
1990
1991 if (color_parse("reset", color) < 0)
1992 die("BUG: couldn't parse 'reset' as a color");
1993 resetv.s = color;
1994 append_atom(&resetv, &state);
1995 }
1996 if (state.stack->prev)
1997 die(_("format: %%(end) atom missing"));
1998 strbuf_addbuf(final_buf, &state.stack->output);
1999 pop_stack_element(&state.stack);
2000 }
2001
2002 void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
2003 {
2004 struct strbuf final_buf = STRBUF_INIT;
2005
2006 format_ref_array_item(info, format, quote_style, &final_buf);
2007 fwrite(final_buf.buf, 1, final_buf.len, stdout);
2008 strbuf_release(&final_buf);
2009 putchar('\n');
2010 }
2011
2012 /* If no sorting option is given, use refname to sort as default */
2013 struct ref_sorting *ref_default_sorting(void)
2014 {
2015 static const char cstr_name[] = "refname";
2016
2017 struct ref_sorting *sorting = xcalloc(1, sizeof(*sorting));
2018
2019 sorting->next = NULL;
2020 sorting->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
2021 return sorting;
2022 }
2023
2024 int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
2025 {
2026 struct ref_sorting **sorting_tail = opt->value;
2027 struct ref_sorting *s;
2028 int len;
2029
2030 if (!arg) /* should --no-sort void the list ? */
2031 return -1;
2032
2033 s = xcalloc(1, sizeof(*s));
2034 s->next = *sorting_tail;
2035 *sorting_tail = s;
2036
2037 if (*arg == '-') {
2038 s->reverse = 1;
2039 arg++;
2040 }
2041 if (skip_prefix(arg, "version:", &arg) ||
2042 skip_prefix(arg, "v:", &arg))
2043 s->version = 1;
2044 len = strlen(arg);
2045 s->atom = parse_ref_filter_atom(arg, arg+len);
2046 return 0;
2047 }
2048
2049 int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
2050 {
2051 struct ref_filter *rf = opt->value;
2052 unsigned char sha1[20];
2053
2054 rf->merge = starts_with(opt->long_name, "no")
2055 ? REF_FILTER_MERGED_OMIT
2056 : REF_FILTER_MERGED_INCLUDE;
2057
2058 if (get_sha1(arg, sha1))
2059 die(_("malformed object name %s"), arg);
2060
2061 rf->merge_commit = lookup_commit_reference_gently(sha1, 0);
2062 if (!rf->merge_commit)
2063 return opterror(opt, "must point to a commit", 0);
2064
2065 return 0;
2066 }