Merge branch 'mh/show-branch-color' into sb/show-branch-parse-options
[git/git.git] / builtin-show-branch.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "refs.h"
4 #include "builtin.h"
5 #include "color.h"
6
7 static const char show_branch_usage[] =
8 "git show-branch [--sparse] [--current] [--all] [--remotes] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...] | --reflog[=n[,b]] <branch>";
9 static const char show_branch_usage_reflog[] =
10 "--reflog is incompatible with --all, --remotes, --independent or --merge-base";
11
12 static int showbranch_use_color = -1;
13 static char column_colors[][COLOR_MAXLEN] = {
14 GIT_COLOR_RED,
15 GIT_COLOR_GREEN,
16 GIT_COLOR_YELLOW,
17 GIT_COLOR_BLUE,
18 GIT_COLOR_MAGENTA,
19 GIT_COLOR_CYAN,
20 };
21
22 #define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors))
23
24 static int default_num;
25 static int default_alloc;
26 static const char **default_arg;
27
28 #define UNINTERESTING 01
29
30 #define REV_SHIFT 2
31 #define MAX_REVS (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */
32
33 #define DEFAULT_REFLOG 4
34
35 static const char *get_color_code(int idx)
36 {
37 if (showbranch_use_color)
38 return column_colors[idx];
39 return "";
40 }
41
42 static const char *get_color_reset_code(void)
43 {
44 if (showbranch_use_color)
45 return GIT_COLOR_RESET;
46 return "";
47 }
48
49 static struct commit *interesting(struct commit_list *list)
50 {
51 while (list) {
52 struct commit *commit = list->item;
53 list = list->next;
54 if (commit->object.flags & UNINTERESTING)
55 continue;
56 return commit;
57 }
58 return NULL;
59 }
60
61 static struct commit *pop_one_commit(struct commit_list **list_p)
62 {
63 struct commit *commit;
64 struct commit_list *list;
65 list = *list_p;
66 commit = list->item;
67 *list_p = list->next;
68 free(list);
69 return commit;
70 }
71
72 struct commit_name {
73 const char *head_name; /* which head's ancestor? */
74 int generation; /* how many parents away from head_name */
75 };
76
77 /* Name the commit as nth generation ancestor of head_name;
78 * we count only the first-parent relationship for naming purposes.
79 */
80 static void name_commit(struct commit *commit, const char *head_name, int nth)
81 {
82 struct commit_name *name;
83 if (!commit->util)
84 commit->util = xmalloc(sizeof(struct commit_name));
85 name = commit->util;
86 name->head_name = head_name;
87 name->generation = nth;
88 }
89
90 /* Parent is the first parent of the commit. We may name it
91 * as (n+1)th generation ancestor of the same head_name as
92 * commit is nth generation ancestor of, if that generation
93 * number is better than the name it already has.
94 */
95 static void name_parent(struct commit *commit, struct commit *parent)
96 {
97 struct commit_name *commit_name = commit->util;
98 struct commit_name *parent_name = parent->util;
99 if (!commit_name)
100 return;
101 if (!parent_name ||
102 commit_name->generation + 1 < parent_name->generation)
103 name_commit(parent, commit_name->head_name,
104 commit_name->generation + 1);
105 }
106
107 static int name_first_parent_chain(struct commit *c)
108 {
109 int i = 0;
110 while (c) {
111 struct commit *p;
112 if (!c->util)
113 break;
114 if (!c->parents)
115 break;
116 p = c->parents->item;
117 if (!p->util) {
118 name_parent(c, p);
119 i++;
120 }
121 else
122 break;
123 c = p;
124 }
125 return i;
126 }
127
128 static void name_commits(struct commit_list *list,
129 struct commit **rev,
130 char **ref_name,
131 int num_rev)
132 {
133 struct commit_list *cl;
134 struct commit *c;
135 int i;
136
137 /* First give names to the given heads */
138 for (cl = list; cl; cl = cl->next) {
139 c = cl->item;
140 if (c->util)
141 continue;
142 for (i = 0; i < num_rev; i++) {
143 if (rev[i] == c) {
144 name_commit(c, ref_name[i], 0);
145 break;
146 }
147 }
148 }
149
150 /* Then commits on the first parent ancestry chain */
151 do {
152 i = 0;
153 for (cl = list; cl; cl = cl->next) {
154 i += name_first_parent_chain(cl->item);
155 }
156 } while (i);
157
158 /* Finally, any unnamed commits */
159 do {
160 i = 0;
161 for (cl = list; cl; cl = cl->next) {
162 struct commit_list *parents;
163 struct commit_name *n;
164 int nth;
165 c = cl->item;
166 if (!c->util)
167 continue;
168 n = c->util;
169 parents = c->parents;
170 nth = 0;
171 while (parents) {
172 struct commit *p = parents->item;
173 char newname[1000], *en;
174 parents = parents->next;
175 nth++;
176 if (p->util)
177 continue;
178 en = newname;
179 switch (n->generation) {
180 case 0:
181 en += sprintf(en, "%s", n->head_name);
182 break;
183 case 1:
184 en += sprintf(en, "%s^", n->head_name);
185 break;
186 default:
187 en += sprintf(en, "%s~%d",
188 n->head_name, n->generation);
189 break;
190 }
191 if (nth == 1)
192 en += sprintf(en, "^");
193 else
194 en += sprintf(en, "^%d", nth);
195 name_commit(p, xstrdup(newname), 0);
196 i++;
197 name_first_parent_chain(p);
198 }
199 }
200 } while (i);
201 }
202
203 static int mark_seen(struct commit *commit, struct commit_list **seen_p)
204 {
205 if (!commit->object.flags) {
206 commit_list_insert(commit, seen_p);
207 return 1;
208 }
209 return 0;
210 }
211
212 static void join_revs(struct commit_list **list_p,
213 struct commit_list **seen_p,
214 int num_rev, int extra)
215 {
216 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
217 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
218
219 while (*list_p) {
220 struct commit_list *parents;
221 int still_interesting = !!interesting(*list_p);
222 struct commit *commit = pop_one_commit(list_p);
223 int flags = commit->object.flags & all_mask;
224
225 if (!still_interesting && extra <= 0)
226 break;
227
228 mark_seen(commit, seen_p);
229 if ((flags & all_revs) == all_revs)
230 flags |= UNINTERESTING;
231 parents = commit->parents;
232
233 while (parents) {
234 struct commit *p = parents->item;
235 int this_flag = p->object.flags;
236 parents = parents->next;
237 if ((this_flag & flags) == flags)
238 continue;
239 if (!p->object.parsed)
240 parse_commit(p);
241 if (mark_seen(p, seen_p) && !still_interesting)
242 extra--;
243 p->object.flags |= flags;
244 insert_by_date(p, list_p);
245 }
246 }
247
248 /*
249 * Postprocess to complete well-poisoning.
250 *
251 * At this point we have all the commits we have seen in
252 * seen_p list. Mark anything that can be reached from
253 * uninteresting commits not interesting.
254 */
255 for (;;) {
256 int changed = 0;
257 struct commit_list *s;
258 for (s = *seen_p; s; s = s->next) {
259 struct commit *c = s->item;
260 struct commit_list *parents;
261
262 if (((c->object.flags & all_revs) != all_revs) &&
263 !(c->object.flags & UNINTERESTING))
264 continue;
265
266 /* The current commit is either a merge base or
267 * already uninteresting one. Mark its parents
268 * as uninteresting commits _only_ if they are
269 * already parsed. No reason to find new ones
270 * here.
271 */
272 parents = c->parents;
273 while (parents) {
274 struct commit *p = parents->item;
275 parents = parents->next;
276 if (!(p->object.flags & UNINTERESTING)) {
277 p->object.flags |= UNINTERESTING;
278 changed = 1;
279 }
280 }
281 }
282 if (!changed)
283 break;
284 }
285 }
286
287 static void show_one_commit(struct commit *commit, int no_name)
288 {
289 struct strbuf pretty = STRBUF_INIT;
290 const char *pretty_str = "(unavailable)";
291 struct commit_name *name = commit->util;
292
293 if (commit->object.parsed) {
294 pretty_print_commit(CMIT_FMT_ONELINE, commit,
295 &pretty, 0, NULL, NULL, 0, 0);
296 pretty_str = pretty.buf;
297 }
298 if (!prefixcmp(pretty_str, "[PATCH] "))
299 pretty_str += 8;
300
301 if (!no_name) {
302 if (name && name->head_name) {
303 printf("[%s", name->head_name);
304 if (name->generation) {
305 if (name->generation == 1)
306 printf("^");
307 else
308 printf("~%d", name->generation);
309 }
310 printf("] ");
311 }
312 else
313 printf("[%s] ",
314 find_unique_abbrev(commit->object.sha1, 7));
315 }
316 puts(pretty_str);
317 strbuf_release(&pretty);
318 }
319
320 static char *ref_name[MAX_REVS + 1];
321 static int ref_name_cnt;
322
323 static const char *find_digit_prefix(const char *s, int *v)
324 {
325 const char *p;
326 int ver;
327 char ch;
328
329 for (p = s, ver = 0;
330 '0' <= (ch = *p) && ch <= '9';
331 p++)
332 ver = ver * 10 + ch - '0';
333 *v = ver;
334 return p;
335 }
336
337
338 static int version_cmp(const char *a, const char *b)
339 {
340 while (1) {
341 int va, vb;
342
343 a = find_digit_prefix(a, &va);
344 b = find_digit_prefix(b, &vb);
345 if (va != vb)
346 return va - vb;
347
348 while (1) {
349 int ca = *a;
350 int cb = *b;
351 if ('0' <= ca && ca <= '9')
352 ca = 0;
353 if ('0' <= cb && cb <= '9')
354 cb = 0;
355 if (ca != cb)
356 return ca - cb;
357 if (!ca)
358 break;
359 a++;
360 b++;
361 }
362 if (!*a && !*b)
363 return 0;
364 }
365 }
366
367 static int compare_ref_name(const void *a_, const void *b_)
368 {
369 const char * const*a = a_, * const*b = b_;
370 return version_cmp(*a, *b);
371 }
372
373 static void sort_ref_range(int bottom, int top)
374 {
375 qsort(ref_name + bottom, top - bottom, sizeof(ref_name[0]),
376 compare_ref_name);
377 }
378
379 static int append_ref(const char *refname, const unsigned char *sha1,
380 int allow_dups)
381 {
382 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
383 int i;
384
385 if (!commit)
386 return 0;
387
388 if (!allow_dups) {
389 /* Avoid adding the same thing twice */
390 for (i = 0; i < ref_name_cnt; i++)
391 if (!strcmp(refname, ref_name[i]))
392 return 0;
393 }
394 if (MAX_REVS <= ref_name_cnt) {
395 warning("ignoring %s; cannot handle more than %d refs",
396 refname, MAX_REVS);
397 return 0;
398 }
399 ref_name[ref_name_cnt++] = xstrdup(refname);
400 ref_name[ref_name_cnt] = NULL;
401 return 0;
402 }
403
404 static int append_head_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
405 {
406 unsigned char tmp[20];
407 int ofs = 11;
408 if (prefixcmp(refname, "refs/heads/"))
409 return 0;
410 /* If both heads/foo and tags/foo exists, get_sha1 would
411 * get confused.
412 */
413 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
414 ofs = 5;
415 return append_ref(refname + ofs, sha1, 0);
416 }
417
418 static int append_remote_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
419 {
420 unsigned char tmp[20];
421 int ofs = 13;
422 if (prefixcmp(refname, "refs/remotes/"))
423 return 0;
424 /* If both heads/foo and tags/foo exists, get_sha1 would
425 * get confused.
426 */
427 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
428 ofs = 5;
429 return append_ref(refname + ofs, sha1, 0);
430 }
431
432 static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
433 {
434 if (prefixcmp(refname, "refs/tags/"))
435 return 0;
436 return append_ref(refname + 5, sha1, 0);
437 }
438
439 static const char *match_ref_pattern = NULL;
440 static int match_ref_slash = 0;
441 static int count_slash(const char *s)
442 {
443 int cnt = 0;
444 while (*s)
445 if (*s++ == '/')
446 cnt++;
447 return cnt;
448 }
449
450 static int append_matching_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
451 {
452 /* we want to allow pattern hold/<asterisk> to show all
453 * branches under refs/heads/hold/, and v0.99.9? to show
454 * refs/tags/v0.99.9a and friends.
455 */
456 const char *tail;
457 int slash = count_slash(refname);
458 for (tail = refname; *tail && match_ref_slash < slash; )
459 if (*tail++ == '/')
460 slash--;
461 if (!*tail)
462 return 0;
463 if (fnmatch(match_ref_pattern, tail, 0))
464 return 0;
465 if (!prefixcmp(refname, "refs/heads/"))
466 return append_head_ref(refname, sha1, flag, cb_data);
467 if (!prefixcmp(refname, "refs/tags/"))
468 return append_tag_ref(refname, sha1, flag, cb_data);
469 return append_ref(refname, sha1, 0);
470 }
471
472 static void snarf_refs(int head, int remotes)
473 {
474 if (head) {
475 int orig_cnt = ref_name_cnt;
476 for_each_ref(append_head_ref, NULL);
477 sort_ref_range(orig_cnt, ref_name_cnt);
478 }
479 if (remotes) {
480 int orig_cnt = ref_name_cnt;
481 for_each_ref(append_remote_ref, NULL);
482 sort_ref_range(orig_cnt, ref_name_cnt);
483 }
484 }
485
486 static int rev_is_head(char *head, int headlen, char *name,
487 unsigned char *head_sha1, unsigned char *sha1)
488 {
489 if ((!head[0]) ||
490 (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
491 return 0;
492 if (!prefixcmp(head, "refs/heads/"))
493 head += 11;
494 if (!prefixcmp(name, "refs/heads/"))
495 name += 11;
496 else if (!prefixcmp(name, "heads/"))
497 name += 6;
498 return !strcmp(head, name);
499 }
500
501 static int show_merge_base(struct commit_list *seen, int num_rev)
502 {
503 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
504 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
505 int exit_status = 1;
506
507 while (seen) {
508 struct commit *commit = pop_one_commit(&seen);
509 int flags = commit->object.flags & all_mask;
510 if (!(flags & UNINTERESTING) &&
511 ((flags & all_revs) == all_revs)) {
512 puts(sha1_to_hex(commit->object.sha1));
513 exit_status = 0;
514 commit->object.flags |= UNINTERESTING;
515 }
516 }
517 return exit_status;
518 }
519
520 static int show_independent(struct commit **rev,
521 int num_rev,
522 char **ref_name,
523 unsigned int *rev_mask)
524 {
525 int i;
526
527 for (i = 0; i < num_rev; i++) {
528 struct commit *commit = rev[i];
529 unsigned int flag = rev_mask[i];
530
531 if (commit->object.flags == flag)
532 puts(sha1_to_hex(commit->object.sha1));
533 commit->object.flags |= UNINTERESTING;
534 }
535 return 0;
536 }
537
538 static void append_one_rev(const char *av)
539 {
540 unsigned char revkey[20];
541 if (!get_sha1(av, revkey)) {
542 append_ref(av, revkey, 0);
543 return;
544 }
545 if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
546 /* glob style match */
547 int saved_matches = ref_name_cnt;
548 match_ref_pattern = av;
549 match_ref_slash = count_slash(av);
550 for_each_ref(append_matching_ref, NULL);
551 if (saved_matches == ref_name_cnt &&
552 ref_name_cnt < MAX_REVS)
553 error("no matching refs with %s", av);
554 if (saved_matches + 1 < ref_name_cnt)
555 sort_ref_range(saved_matches, ref_name_cnt);
556 return;
557 }
558 die("bad sha1 reference %s", av);
559 }
560
561 static int git_show_branch_config(const char *var, const char *value, void *cb)
562 {
563 if (!strcmp(var, "showbranch.default")) {
564 if (!value)
565 return config_error_nonbool(var);
566 if (default_alloc <= default_num + 1) {
567 default_alloc = default_alloc * 3 / 2 + 20;
568 default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);
569 }
570 default_arg[default_num++] = xstrdup(value);
571 default_arg[default_num] = NULL;
572 return 0;
573 }
574
575 if (!strcmp(var, "color.showbranch")) {
576 showbranch_use_color = git_config_colorbool(var, value, -1);
577 return 0;
578 }
579
580 return git_color_default_config(var, value, cb);
581 }
582
583 static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
584 {
585 /* If the commit is tip of the named branches, do not
586 * omit it.
587 * Otherwise, if it is a merge that is reachable from only one
588 * tip, it is not that interesting.
589 */
590 int i, flag, count;
591 for (i = 0; i < n; i++)
592 if (rev[i] == commit)
593 return 0;
594 flag = commit->object.flags;
595 for (i = count = 0; i < n; i++) {
596 if (flag & (1u << (i + REV_SHIFT)))
597 count++;
598 }
599 if (count == 1)
600 return 1;
601 return 0;
602 }
603
604 static void parse_reflog_param(const char *arg, int *cnt, const char **base)
605 {
606 char *ep;
607 *cnt = strtoul(arg, &ep, 10);
608 if (*ep == ',')
609 *base = ep + 1;
610 else if (*ep)
611 die("unrecognized reflog param '%s'", arg);
612 else
613 *base = NULL;
614 if (*cnt <= 0)
615 *cnt = DEFAULT_REFLOG;
616 }
617
618 int cmd_show_branch(int ac, const char **av, const char *prefix)
619 {
620 struct commit *rev[MAX_REVS], *commit;
621 char *reflog_msg[MAX_REVS];
622 struct commit_list *list = NULL, *seen = NULL;
623 unsigned int rev_mask[MAX_REVS];
624 int num_rev, i, extra = 0;
625 int all_heads = 0, all_remotes = 0;
626 int all_mask, all_revs;
627 int lifo = 1;
628 char head[128];
629 const char *head_p;
630 int head_len;
631 unsigned char head_sha1[20];
632 int merge_base = 0;
633 int independent = 0;
634 int no_name = 0;
635 int sha1_name = 0;
636 int shown_merge_point = 0;
637 int with_current_branch = 0;
638 int head_at = -1;
639 int topics = 0;
640 int dense = 1;
641 int reflog = 0;
642 const char *reflog_base = NULL;
643
644 git_config(git_show_branch_config, NULL);
645
646 if (showbranch_use_color == -1)
647 showbranch_use_color = git_use_color_default;
648
649 /* If nothing is specified, try the default first */
650 if (ac == 1 && default_num) {
651 ac = default_num + 1;
652 av = default_arg - 1; /* ick; we would not address av[0] */
653 }
654
655 while (1 < ac && av[1][0] == '-') {
656 const char *arg = av[1];
657 if (!strcmp(arg, "--")) {
658 ac--; av++;
659 break;
660 }
661 else if (!strcmp(arg, "--all") || !strcmp(arg, "-a"))
662 all_heads = all_remotes = 1;
663 else if (!strcmp(arg, "--remotes") || !strcmp(arg, "-r"))
664 all_remotes = 1;
665 else if (!strcmp(arg, "--more"))
666 extra = 1;
667 else if (!strcmp(arg, "--list"))
668 extra = -1;
669 else if (!strcmp(arg, "--no-name"))
670 no_name = 1;
671 else if (!strcmp(arg, "--current"))
672 with_current_branch = 1;
673 else if (!strcmp(arg, "--sha1-name"))
674 sha1_name = 1;
675 else if (!prefixcmp(arg, "--more="))
676 extra = atoi(arg + 7);
677 else if (!strcmp(arg, "--merge-base"))
678 merge_base = 1;
679 else if (!strcmp(arg, "--independent"))
680 independent = 1;
681 else if (!strcmp(arg, "--topo-order"))
682 lifo = 1;
683 else if (!strcmp(arg, "--topics"))
684 topics = 1;
685 else if (!strcmp(arg, "--sparse"))
686 dense = 0;
687 else if (!strcmp(arg, "--date-order"))
688 lifo = 0;
689 else if (!strcmp(arg, "--reflog") || !strcmp(arg, "-g")) {
690 reflog = DEFAULT_REFLOG;
691 }
692 else if (!prefixcmp(arg, "--reflog="))
693 parse_reflog_param(arg + 9, &reflog, &reflog_base);
694 else if (!prefixcmp(arg, "-g="))
695 parse_reflog_param(arg + 3, &reflog, &reflog_base);
696 else if (!strcmp(arg, "--color"))
697 showbranch_use_color = 1;
698 else if (!strcmp(arg, "--no-color"))
699 showbranch_use_color = 0;
700 else
701 usage(show_branch_usage);
702 ac--; av++;
703 }
704 ac--; av++;
705
706 if (extra || reflog) {
707 /* "listing" mode is incompatible with
708 * independent nor merge-base modes.
709 */
710 if (independent || merge_base)
711 usage(show_branch_usage);
712 if (reflog && ((0 < extra) || all_heads || all_remotes))
713 /*
714 * Asking for --more in reflog mode does not
715 * make sense. --list is Ok.
716 *
717 * Also --all and --remotes do not make sense either.
718 */
719 usage(show_branch_usage_reflog);
720 }
721
722 /* If nothing is specified, show all branches by default */
723 if (ac + all_heads + all_remotes == 0)
724 all_heads = 1;
725
726 if (reflog) {
727 unsigned char sha1[20];
728 char nth_desc[256];
729 char *ref;
730 int base = 0;
731
732 if (ac == 0) {
733 static const char *fake_av[2];
734 const char *refname;
735
736 refname = resolve_ref("HEAD", sha1, 1, NULL);
737 fake_av[0] = xstrdup(refname);
738 fake_av[1] = NULL;
739 av = fake_av;
740 ac = 1;
741 }
742 if (ac != 1)
743 die("--reflog option needs one branch name");
744
745 if (MAX_REVS < reflog)
746 die("Only %d entries can be shown at one time.",
747 MAX_REVS);
748 if (!dwim_ref(*av, strlen(*av), sha1, &ref))
749 die("No such ref %s", *av);
750
751 /* Has the base been specified? */
752 if (reflog_base) {
753 char *ep;
754 base = strtoul(reflog_base, &ep, 10);
755 if (*ep) {
756 /* Ah, that is a date spec... */
757 unsigned long at;
758 at = approxidate(reflog_base);
759 read_ref_at(ref, at, -1, sha1, NULL,
760 NULL, NULL, &base);
761 }
762 }
763
764 for (i = 0; i < reflog; i++) {
765 char *logmsg, *m;
766 const char *msg;
767 unsigned long timestamp;
768 int tz;
769
770 if (read_ref_at(ref, 0, base+i, sha1, &logmsg,
771 &timestamp, &tz, NULL)) {
772 reflog = i;
773 break;
774 }
775 msg = strchr(logmsg, '\t');
776 if (!msg)
777 msg = "(none)";
778 else
779 msg++;
780 m = xmalloc(strlen(msg) + 200);
781 sprintf(m, "(%s) %s",
782 show_date(timestamp, tz, 1),
783 msg);
784 reflog_msg[i] = m;
785 free(logmsg);
786 sprintf(nth_desc, "%s@{%d}", *av, base+i);
787 append_ref(nth_desc, sha1, 1);
788 }
789 }
790 else if (all_heads + all_remotes)
791 snarf_refs(all_heads, all_remotes);
792 else {
793 while (0 < ac) {
794 append_one_rev(*av);
795 ac--; av++;
796 }
797 }
798
799 head_p = resolve_ref("HEAD", head_sha1, 1, NULL);
800 if (head_p) {
801 head_len = strlen(head_p);
802 memcpy(head, head_p, head_len + 1);
803 }
804 else {
805 head_len = 0;
806 head[0] = 0;
807 }
808
809 if (with_current_branch && head_p) {
810 int has_head = 0;
811 for (i = 0; !has_head && i < ref_name_cnt; i++) {
812 /* We are only interested in adding the branch
813 * HEAD points at.
814 */
815 if (rev_is_head(head,
816 head_len,
817 ref_name[i],
818 head_sha1, NULL))
819 has_head++;
820 }
821 if (!has_head) {
822 int offset = !prefixcmp(head, "refs/heads/") ? 11 : 0;
823 append_one_rev(head + offset);
824 }
825 }
826
827 if (!ref_name_cnt) {
828 fprintf(stderr, "No revs to be shown.\n");
829 exit(0);
830 }
831
832 for (num_rev = 0; ref_name[num_rev]; num_rev++) {
833 unsigned char revkey[20];
834 unsigned int flag = 1u << (num_rev + REV_SHIFT);
835
836 if (MAX_REVS <= num_rev)
837 die("cannot handle more than %d revs.", MAX_REVS);
838 if (get_sha1(ref_name[num_rev], revkey))
839 die("'%s' is not a valid ref.", ref_name[num_rev]);
840 commit = lookup_commit_reference(revkey);
841 if (!commit)
842 die("cannot find commit %s (%s)",
843 ref_name[num_rev], revkey);
844 parse_commit(commit);
845 mark_seen(commit, &seen);
846
847 /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
848 * and so on. REV_SHIFT bits from bit 0 are used for
849 * internal bookkeeping.
850 */
851 commit->object.flags |= flag;
852 if (commit->object.flags == flag)
853 insert_by_date(commit, &list);
854 rev[num_rev] = commit;
855 }
856 for (i = 0; i < num_rev; i++)
857 rev_mask[i] = rev[i]->object.flags;
858
859 if (0 <= extra)
860 join_revs(&list, &seen, num_rev, extra);
861
862 sort_by_date(&seen);
863
864 if (merge_base)
865 return show_merge_base(seen, num_rev);
866
867 if (independent)
868 return show_independent(rev, num_rev, ref_name, rev_mask);
869
870 /* Show list; --more=-1 means list-only */
871 if (1 < num_rev || extra < 0) {
872 for (i = 0; i < num_rev; i++) {
873 int j;
874 int is_head = rev_is_head(head,
875 head_len,
876 ref_name[i],
877 head_sha1,
878 rev[i]->object.sha1);
879 if (extra < 0)
880 printf("%c [%s] ",
881 is_head ? '*' : ' ', ref_name[i]);
882 else {
883 for (j = 0; j < i; j++)
884 putchar(' ');
885 printf("%s%c%s [%s] ",
886 get_color_code(i % COLUMN_COLORS_MAX),
887 is_head ? '*' : '!',
888 get_color_reset_code(), ref_name[i]);
889 }
890
891 if (!reflog) {
892 /* header lines never need name */
893 show_one_commit(rev[i], 1);
894 }
895 else
896 puts(reflog_msg[i]);
897
898 if (is_head)
899 head_at = i;
900 }
901 if (0 <= extra) {
902 for (i = 0; i < num_rev; i++)
903 putchar('-');
904 putchar('\n');
905 }
906 }
907 if (extra < 0)
908 exit(0);
909
910 /* Sort topologically */
911 sort_in_topological_order(&seen, lifo);
912
913 /* Give names to commits */
914 if (!sha1_name && !no_name)
915 name_commits(seen, rev, ref_name, num_rev);
916
917 all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
918 all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
919
920 while (seen) {
921 struct commit *commit = pop_one_commit(&seen);
922 int this_flag = commit->object.flags;
923 int is_merge_point = ((this_flag & all_revs) == all_revs);
924
925 shown_merge_point |= is_merge_point;
926
927 if (1 < num_rev) {
928 int is_merge = !!(commit->parents &&
929 commit->parents->next);
930 if (topics &&
931 !is_merge_point &&
932 (this_flag & (1u << REV_SHIFT)))
933 continue;
934 if (dense && is_merge &&
935 omit_in_dense(commit, rev, num_rev))
936 continue;
937 for (i = 0; i < num_rev; i++) {
938 int mark;
939 if (!(this_flag & (1u << (i + REV_SHIFT))))
940 mark = ' ';
941 else if (is_merge)
942 mark = '-';
943 else if (i == head_at)
944 mark = '*';
945 else
946 mark = '+';
947 printf("%s%c%s",
948 get_color_code(i % COLUMN_COLORS_MAX),
949 mark, get_color_reset_code());
950 }
951 putchar(' ');
952 }
953 show_one_commit(commit, no_name);
954
955 if (shown_merge_point && --extra < 0)
956 break;
957 }
958 return 0;
959 }