1#include "cache.h"
2#include "commit.h"
3#include "refs.h"
4#include "builtin.h"
5#include "color.h"
6#include "parse-options.h"
7static const char* show_branch_usage[] = {
9 "git show-branch [-a|--all] [-r|--remotes] [--topo-order | --date-order] [--current] [--color[=<when>] | --no-color] [--sparse] [--more=<n> | --list | --independent | --merge-base] [--no-name | --sha1-name] [--topics] [(<rev> | <glob>)...]",
10 "git show-branch (-g|--reflog)[=<n>[,<base>]] [--list] [<ref>]",
11 NULL
12};
13static int showbranch_use_color = -1;
15static char column_colors[][COLOR_MAXLEN] = {
16 GIT_COLOR_RED,
17 GIT_COLOR_GREEN,
18 GIT_COLOR_YELLOW,
19 GIT_COLOR_BLUE,
20 GIT_COLOR_MAGENTA,
21 GIT_COLOR_CYAN,
22};
23#define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors))
25static int default_num;
27static int default_alloc;
28static const char **default_arg;
29#define UNINTERESTING 01
31#define REV_SHIFT 2
33#define MAX_REVS (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */
34#define DEFAULT_REFLOG 4
36static const char *get_color_code(int idx)
38{
39 if (showbranch_use_color)
40 return column_colors[idx];
41 return "";
42}
43static const char *get_color_reset_code(void)
45{
46 if (showbranch_use_color)
47 return GIT_COLOR_RESET;
48 return "";
49}
50static struct commit *interesting(struct commit_list *list)
52{
53 while (list) {
54 struct commit *commit = list->item;
55 list = list->next;
56 if (commit->object.flags & UNINTERESTING)
57 continue;
58 return commit;
59 }
60 return NULL;
61}
62static struct commit *pop_one_commit(struct commit_list **list_p)
64{
65 struct commit *commit;
66 struct commit_list *list;
67 list = *list_p;
68 commit = list->item;
69 *list_p = list->next;
70 free(list);
71 return commit;
72}
73struct commit_name {
75 const char *head_name; /* which head's ancestor? */
76 int generation; /* how many parents away from head_name */
77};
78/* Name the commit as nth generation ancestor of head_name;
80 * we count only the first-parent relationship for naming purposes.
81 */
82static void name_commit(struct commit *commit, const char *head_name, int nth)
83{
84 struct commit_name *name;
85 if (!commit->util)
86 commit->util = xmalloc(sizeof(struct commit_name));
87 name = commit->util;
88 name->head_name = head_name;
89 name->generation = nth;
90}
91/* Parent is the first parent of the commit. We may name it
93 * as (n+1)th generation ancestor of the same head_name as
94 * commit is nth generation ancestor of, if that generation
95 * number is better than the name it already has.
96 */
97static void name_parent(struct commit *commit, struct commit *parent)
98{
99 struct commit_name *commit_name = commit->util;
100 struct commit_name *parent_name = parent->util;
101 if (!commit_name)
102 return;
103 if (!parent_name ||
104 commit_name->generation + 1 < parent_name->generation)
105 name_commit(parent, commit_name->head_name,
106 commit_name->generation + 1);
107}
108static int name_first_parent_chain(struct commit *c)
110{
111 int i = 0;
112 while (c) {
113 struct commit *p;
114 if (!c->util)
115 break;
116 if (!c->parents)
117 break;
118 p = c->parents->item;
119 if (!p->util) {
120 name_parent(c, p);
121 i++;
122 }
123 else
124 break;
125 c = p;
126 }
127 return i;
128}
129static void name_commits(struct commit_list *list,
131 struct commit **rev,
132 char **ref_name,
133 int num_rev)
134{
135 struct commit_list *cl;
136 struct commit *c;
137 int i;
138 /* First give names to the given heads */
140 for (cl = list; cl; cl = cl->next) {
141 c = cl->item;
142 if (c->util)
143 continue;
144 for (i = 0; i < num_rev; i++) {
145 if (rev[i] == c) {
146 name_commit(c, ref_name[i], 0);
147 break;
148 }
149 }
150 }
151 /* Then commits on the first parent ancestry chain */
153 do {
154 i = 0;
155 for (cl = list; cl; cl = cl->next) {
156 i += name_first_parent_chain(cl->item);
157 }
158 } while (i);
159 /* Finally, any unnamed commits */
161 do {
162 i = 0;
163 for (cl = list; cl; cl = cl->next) {
164 struct commit_list *parents;
165 struct commit_name *n;
166 int nth;
167 c = cl->item;
168 if (!c->util)
169 continue;
170 n = c->util;
171 parents = c->parents;
172 nth = 0;
173 while (parents) {
174 struct commit *p = parents->item;
175 char newname[1000], *en;
176 parents = parents->next;
177 nth++;
178 if (p->util)
179 continue;
180 en = newname;
181 switch (n->generation) {
182 case 0:
183 en += sprintf(en, "%s", n->head_name);
184 break;
185 case 1:
186 en += sprintf(en, "%s^", n->head_name);
187 break;
188 default:
189 en += sprintf(en, "%s~%d",
190 n->head_name, n->generation);
191 break;
192 }
193 if (nth == 1)
194 en += sprintf(en, "^");
195 else
196 en += sprintf(en, "^%d", nth);
197 name_commit(p, xstrdup(newname), 0);
198 i++;
199 name_first_parent_chain(p);
200 }
201 }
202 } while (i);
203}
204static int mark_seen(struct commit *commit, struct commit_list **seen_p)
206{
207 if (!commit->object.flags) {
208 commit_list_insert(commit, seen_p);
209 return 1;
210 }
211 return 0;
212}
213static void join_revs(struct commit_list **list_p,
215 struct commit_list **seen_p,
216 int num_rev, int extra)
217{
218 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
219 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
220 while (*list_p) {
222 struct commit_list *parents;
223 int still_interesting = !!interesting(*list_p);
224 struct commit *commit = pop_one_commit(list_p);
225 int flags = commit->object.flags & all_mask;
226 if (!still_interesting && extra <= 0)
228 break;
229 mark_seen(commit, seen_p);
231 if ((flags & all_revs) == all_revs)
232 flags |= UNINTERESTING;
233 parents = commit->parents;
234 while (parents) {
236 struct commit *p = parents->item;
237 int this_flag = p->object.flags;
238 parents = parents->next;
239 if ((this_flag & flags) == flags)
240 continue;
241 if (!p->object.parsed)
242 parse_commit(p);
243 if (mark_seen(p, seen_p) && !still_interesting)
244 extra--;
245 p->object.flags |= flags;
246 commit_list_insert_by_date(p, list_p);
247 }
248 }
249 /*
251 * Postprocess to complete well-poisoning.
252 *
253 * At this point we have all the commits we have seen in
254 * seen_p list. Mark anything that can be reached from
255 * uninteresting commits not interesting.
256 */
257 for (;;) {
258 int changed = 0;
259 struct commit_list *s;
260 for (s = *seen_p; s; s = s->next) {
261 struct commit *c = s->item;
262 struct commit_list *parents;
263 if (((c->object.flags & all_revs) != all_revs) &&
265 !(c->object.flags & UNINTERESTING))
266 continue;
267 /* The current commit is either a merge base or
269 * already uninteresting one. Mark its parents
270 * as uninteresting commits _only_ if they are
271 * already parsed. No reason to find new ones
272 * here.
273 */
274 parents = c->parents;
275 while (parents) {
276 struct commit *p = parents->item;
277 parents = parents->next;
278 if (!(p->object.flags & UNINTERESTING)) {
279 p->object.flags |= UNINTERESTING;
280 changed = 1;
281 }
282 }
283 }
284 if (!changed)
285 break;
286 }
287}
288static void show_one_commit(struct commit *commit, int no_name)
290{
291 struct strbuf pretty = STRBUF_INIT;
292 const char *pretty_str = "(unavailable)";
293 struct commit_name *name = commit->util;
294 if (commit->object.parsed) {
296 struct pretty_print_context ctx = {0};
297 pretty_print_commit(CMIT_FMT_ONELINE, commit, &pretty, &ctx);
298 pretty_str = pretty.buf;
299 }
300 if (!prefixcmp(pretty_str, "[PATCH] "))
301 pretty_str += 8;
302 if (!no_name) {
304 if (name && name->head_name) {
305 printf("[%s", name->head_name);
306 if (name->generation) {
307 if (name->generation == 1)
308 printf("^");
309 else
310 printf("~%d", name->generation);
311 }
312 printf("] ");
313 }
314 else
315 printf("[%s] ",
316 find_unique_abbrev(commit->object.sha1,
317 DEFAULT_ABBREV));
318 }
319 puts(pretty_str);
320 strbuf_release(&pretty);
321}
322static char *ref_name[MAX_REVS + 1];
324static int ref_name_cnt;
325static const char *find_digit_prefix(const char *s, int *v)
327{
328 const char *p;
329 int ver;
330 char ch;
331 for (p = s, ver = 0;
333 '0' <= (ch = *p) && ch <= '9';
334 p++)
335 ver = ver * 10 + ch - '0';
336 *v = ver;
337 return p;
338}
339static int version_cmp(const char *a, const char *b)
342{
343 while (1) {
344 int va, vb;
345 a = find_digit_prefix(a, &va);
347 b = find_digit_prefix(b, &vb);
348 if (va != vb)
349 return va - vb;
350 while (1) {
352 int ca = *a;
353 int cb = *b;
354 if ('0' <= ca && ca <= '9')
355 ca = 0;
356 if ('0' <= cb && cb <= '9')
357 cb = 0;
358 if (ca != cb)
359 return ca - cb;
360 if (!ca)
361 break;
362 a++;
363 b++;
364 }
365 if (!*a && !*b)
366 return 0;
367 }
368}
369static int compare_ref_name(const void *a_, const void *b_)
371{
372 const char * const*a = a_, * const*b = b_;
373 return version_cmp(*a, *b);
374}
375static void sort_ref_range(int bottom, int top)
377{
378 qsort(ref_name + bottom, top - bottom, sizeof(ref_name[0]),
379 compare_ref_name);
380}
381static int append_ref(const char *refname, const unsigned char *sha1,
383 int allow_dups)
384{
385 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
386 int i;
387 if (!commit)
389 return 0;
390 if (!allow_dups) {
392 /* Avoid adding the same thing twice */
393 for (i = 0; i < ref_name_cnt; i++)
394 if (!strcmp(refname, ref_name[i]))
395 return 0;
396 }
397 if (MAX_REVS <= ref_name_cnt) {
398 warning("ignoring %s; cannot handle more than %d refs",
399 refname, MAX_REVS);
400 return 0;
401 }
402 ref_name[ref_name_cnt++] = xstrdup(refname);
403 ref_name[ref_name_cnt] = NULL;
404 return 0;
405}
406static int append_head_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
408{
409 unsigned char tmp[20];
410 int ofs = 11;
411 if (prefixcmp(refname, "refs/heads/"))
412 return 0;
413 /* If both heads/foo and tags/foo exists, get_sha1 would
414 * get confused.
415 */
416 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
417 ofs = 5;
418 return append_ref(refname + ofs, sha1, 0);
419}
420static int append_remote_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
422{
423 unsigned char tmp[20];
424 int ofs = 13;
425 if (prefixcmp(refname, "refs/remotes/"))
426 return 0;
427 /* If both heads/foo and tags/foo exists, get_sha1 would
428 * get confused.
429 */
430 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
431 ofs = 5;
432 return append_ref(refname + ofs, sha1, 0);
433}
434static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
436{
437 if (prefixcmp(refname, "refs/tags/"))
438 return 0;
439 return append_ref(refname + 5, sha1, 0);
440}
441static const char *match_ref_pattern = NULL;
443static int match_ref_slash = 0;
444static int count_slash(const char *s)
445{
446 int cnt = 0;
447 while (*s)
448 if (*s++ == '/')
449 cnt++;
450 return cnt;
451}
452static int append_matching_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
454{
455 /* we want to allow pattern hold/<asterisk> to show all
456 * branches under refs/heads/hold/, and v0.99.9? to show
457 * refs/tags/v0.99.9a and friends.
458 */
459 const char *tail;
460 int slash = count_slash(refname);
461 for (tail = refname; *tail && match_ref_slash < slash; )
462 if (*tail++ == '/')
463 slash--;
464 if (!*tail)
465 return 0;
466 if (fnmatch(match_ref_pattern, tail, 0))
467 return 0;
468 if (!prefixcmp(refname, "refs/heads/"))
469 return append_head_ref(refname, sha1, flag, cb_data);
470 if (!prefixcmp(refname, "refs/tags/"))
471 return append_tag_ref(refname, sha1, flag, cb_data);
472 return append_ref(refname, sha1, 0);
473}
474static void snarf_refs(int head, int remotes)
476{
477 if (head) {
478 int orig_cnt = ref_name_cnt;
479 for_each_ref(append_head_ref, NULL);
480 sort_ref_range(orig_cnt, ref_name_cnt);
481 }
482 if (remotes) {
483 int orig_cnt = ref_name_cnt;
484 for_each_ref(append_remote_ref, NULL);
485 sort_ref_range(orig_cnt, ref_name_cnt);
486 }
487}
488static int rev_is_head(char *head, int headlen, char *name,
490 unsigned char *head_sha1, unsigned char *sha1)
491{
492 if ((!head[0]) ||
493 (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
494 return 0;
495 if (!prefixcmp(head, "refs/heads/"))
496 head += 11;
497 if (!prefixcmp(name, "refs/heads/"))
498 name += 11;
499 else if (!prefixcmp(name, "heads/"))
500 name += 6;
501 return !strcmp(head, name);
502}
503static int show_merge_base(struct commit_list *seen, int num_rev)
505{
506 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
507 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
508 int exit_status = 1;
509 while (seen) {
511 struct commit *commit = pop_one_commit(&seen);
512 int flags = commit->object.flags & all_mask;
513 if (!(flags & UNINTERESTING) &&
514 ((flags & all_revs) == all_revs)) {
515 puts(sha1_to_hex(commit->object.sha1));
516 exit_status = 0;
517 commit->object.flags |= UNINTERESTING;
518 }
519 }
520 return exit_status;
521}
522static int show_independent(struct commit **rev,
524 int num_rev,
525 char **ref_name,
526 unsigned int *rev_mask)
527{
528 int i;
529 for (i = 0; i < num_rev; i++) {
531 struct commit *commit = rev[i];
532 unsigned int flag = rev_mask[i];
533 if (commit->object.flags == flag)
535 puts(sha1_to_hex(commit->object.sha1));
536 commit->object.flags |= UNINTERESTING;
537 }
538 return 0;
539}
540static void append_one_rev(const char *av)
542{
543 unsigned char revkey[20];
544 if (!get_sha1(av, revkey)) {
545 append_ref(av, revkey, 0);
546 return;
547 }
548 if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
549 /* glob style match */
550 int saved_matches = ref_name_cnt;
551 match_ref_pattern = av;
552 match_ref_slash = count_slash(av);
553 for_each_ref(append_matching_ref, NULL);
554 if (saved_matches == ref_name_cnt &&
555 ref_name_cnt < MAX_REVS)
556 error("no matching refs with %s", av);
557 if (saved_matches + 1 < ref_name_cnt)
558 sort_ref_range(saved_matches, ref_name_cnt);
559 return;
560 }
561 die("bad sha1 reference %s", av);
562}
563static int git_show_branch_config(const char *var, const char *value, void *cb)
565{
566 if (!strcmp(var, "showbranch.default")) {
567 if (!value)
568 return config_error_nonbool(var);
569 /*
570 * default_arg is now passed to parse_options(), so we need to
571 * mimic the real argv a bit better.
572 */
573 if (!default_num) {
574 default_alloc = 20;
575 default_arg = xcalloc(default_alloc, sizeof(*default_arg));
576 default_arg[default_num++] = "show-branch";
577 } else if (default_alloc <= default_num + 1) {
578 default_alloc = default_alloc * 3 / 2 + 20;
579 default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);
580 }
581 default_arg[default_num++] = xstrdup(value);
582 default_arg[default_num] = NULL;
583 return 0;
584 }
585 if (!strcmp(var, "color.showbranch")) {
587 showbranch_use_color = git_config_colorbool(var, value, -1);
588 return 0;
589 }
590 return git_color_default_config(var, value, cb);
592}
593static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
595{
596 /* If the commit is tip of the named branches, do not
597 * omit it.
598 * Otherwise, if it is a merge that is reachable from only one
599 * tip, it is not that interesting.
600 */
601 int i, flag, count;
602 for (i = 0; i < n; i++)
603 if (rev[i] == commit)
604 return 0;
605 flag = commit->object.flags;
606 for (i = count = 0; i < n; i++) {
607 if (flag & (1u << (i + REV_SHIFT)))
608 count++;
609 }
610 if (count == 1)
611 return 1;
612 return 0;
613}
614static int reflog = 0;
616static int parse_reflog_param(const struct option *opt, const char *arg,
618 int unset)
619{
620 char *ep;
621 const char **base = (const char **)opt->value;
622 if (!arg)
623 arg = "";
624 reflog = strtoul(arg, &ep, 10);
625 if (*ep == ',')
626 *base = ep + 1;
627 else if (*ep)
628 return error("unrecognized reflog param '%s'", arg);
629 else
630 *base = NULL;
631 if (reflog <= 0)
632 reflog = DEFAULT_REFLOG;
633 return 0;
634}
635int cmd_show_branch(int ac, const char **av, const char *prefix)
637{
638 struct commit *rev[MAX_REVS], *commit;
639 char *reflog_msg[MAX_REVS];
640 struct commit_list *list = NULL, *seen = NULL;
641 unsigned int rev_mask[MAX_REVS];
642 int num_rev, i, extra = 0;
643 int all_heads = 0, all_remotes = 0;
644 int all_mask, all_revs;
645 int lifo = 1;
646 char head[128];
647 const char *head_p;
648 int head_len;
649 unsigned char head_sha1[20];
650 int merge_base = 0;
651 int independent = 0;
652 int no_name = 0;
653 int sha1_name = 0;
654 int shown_merge_point = 0;
655 int with_current_branch = 0;
656 int head_at = -1;
657 int topics = 0;
658 int dense = 1;
659 const char *reflog_base = NULL;
660 struct option builtin_show_branch_options[] = {
661 OPT_BOOLEAN('a', "all", &all_heads,
662 "show remote-tracking and local branches"),
663 OPT_BOOLEAN('r', "remotes", &all_remotes,
664 "show remote-tracking branches"),
665 OPT__COLOR(&showbranch_use_color,
666 "color '*!+-' corresponding to the branch"),
667 { OPTION_INTEGER, 0, "more", &extra, "n",
668 "show <n> more commits after the common ancestor",
669 PARSE_OPT_OPTARG, NULL, (intptr_t)1 },
670 OPT_SET_INT(0, "list", &extra, "synonym to more=-1", -1),
671 OPT_BOOLEAN(0, "no-name", &no_name, "suppress naming strings"),
672 OPT_BOOLEAN(0, "current", &with_current_branch,
673 "include the current branch"),
674 OPT_BOOLEAN(0, "sha1-name", &sha1_name,
675 "name commits with their object names"),
676 OPT_BOOLEAN(0, "merge-base", &merge_base,
677 "show possible merge bases"),
678 OPT_BOOLEAN(0, "independent", &independent,
679 "show refs unreachable from any other ref"),
680 OPT_BOOLEAN(0, "topo-order", &lifo,
681 "show commits in topological order"),
682 OPT_BOOLEAN(0, "topics", &topics,
683 "show only commits not on the first branch"),
684 OPT_SET_INT(0, "sparse", &dense,
685 "show merges reachable from only one tip", 0),
686 OPT_SET_INT(0, "date-order", &lifo,
687 "show commits where no parent comes before its "
688 "children", 0),
689 { OPTION_CALLBACK, 'g', "reflog", &reflog_base, "<n>[,<base>]",
690 "show <n> most recent ref-log entries starting at "
691 "base",
692 PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP,
693 parse_reflog_param },
694 OPT_END()
695 };
696 git_config(git_show_branch_config, NULL);
698 if (showbranch_use_color == -1)
700 showbranch_use_color = git_use_color_default;
701 /* If nothing is specified, try the default first */
703 if (ac == 1 && default_num) {
704 ac = default_num;
705 av = default_arg;
706 }
707 ac = parse_options(ac, av, prefix, builtin_show_branch_options,
709 show_branch_usage, PARSE_OPT_STOP_AT_NON_OPTION);
710 if (all_heads)
711 all_remotes = 1;
712 if (extra || reflog) {
714 /* "listing" mode is incompatible with
715 * independent nor merge-base modes.
716 */
717 if (independent || merge_base)
718 usage_with_options(show_branch_usage,
719 builtin_show_branch_options);
720 if (reflog && ((0 < extra) || all_heads || all_remotes))
721 /*
722 * Asking for --more in reflog mode does not
723 * make sense. --list is Ok.
724 *
725 * Also --all and --remotes do not make sense either.
726 */
727 die("--reflog is incompatible with --all, --remotes, "
728 "--independent or --merge-base");
729 }
730 /* If nothing is specified, show all branches by default */
732 if (ac + all_heads + all_remotes == 0)
733 all_heads = 1;
734 if (reflog) {
736 unsigned char sha1[20];
737 char nth_desc[256];
738 char *ref;
739 int base = 0;
740 if (ac == 0) {
742 static const char *fake_av[2];
743 const char *refname;
744 refname = resolve_ref("HEAD", sha1, 1, NULL);
746 fake_av[0] = xstrdup(refname);
747 fake_av[1] = NULL;
748 av = fake_av;
749 ac = 1;
750 }
751 if (ac != 1)
752 die("--reflog option needs one branch name");
753 if (MAX_REVS < reflog)
755 die("Only %d entries can be shown at one time.",
756 MAX_REVS);
757 if (!dwim_ref(*av, strlen(*av), sha1, &ref))
758 die("No such ref %s", *av);
759 /* Has the base been specified? */
761 if (reflog_base) {
762 char *ep;
763 base = strtoul(reflog_base, &ep, 10);
764 if (*ep) {
765 /* Ah, that is a date spec... */
766 unsigned long at;
767 at = approxidate(reflog_base);
768 read_ref_at(ref, at, -1, sha1, NULL,
769 NULL, NULL, &base);
770 }
771 }
772 for (i = 0; i < reflog; i++) {
774 char *logmsg, *m;
775 const char *msg;
776 unsigned long timestamp;
777 int tz;
778 if (read_ref_at(ref, 0, base+i, sha1, &logmsg,
780 ×tamp, &tz, NULL)) {
781 reflog = i;
782 break;
783 }
784 msg = strchr(logmsg, '\t');
785 if (!msg)
786 msg = "(none)";
787 else
788 msg++;
789 m = xmalloc(strlen(msg) + 200);
790 sprintf(m, "(%s) %s",
791 show_date(timestamp, tz, 1),
792 msg);
793 reflog_msg[i] = m;
794 free(logmsg);
795 sprintf(nth_desc, "%s@{%d}", *av, base+i);
796 append_ref(nth_desc, sha1, 1);
797 }
798 }
799 else if (all_heads + all_remotes)
800 snarf_refs(all_heads, all_remotes);
801 else {
802 while (0 < ac) {
803 append_one_rev(*av);
804 ac--; av++;
805 }
806 }
807 head_p = resolve_ref("HEAD", head_sha1, 1, NULL);
809 if (head_p) {
810 head_len = strlen(head_p);
811 memcpy(head, head_p, head_len + 1);
812 }
813 else {
814 head_len = 0;
815 head[0] = 0;
816 }
817 if (with_current_branch && head_p) {
819 int has_head = 0;
820 for (i = 0; !has_head && i < ref_name_cnt; i++) {
821 /* We are only interested in adding the branch
822 * HEAD points at.
823 */
824 if (rev_is_head(head,
825 head_len,
826 ref_name[i],
827 head_sha1, NULL))
828 has_head++;
829 }
830 if (!has_head) {
831 int offset = !prefixcmp(head, "refs/heads/") ? 11 : 0;
832 append_one_rev(head + offset);
833 }
834 }
835 if (!ref_name_cnt) {
837 fprintf(stderr, "No revs to be shown.\n");
838 exit(0);
839 }
840 for (num_rev = 0; ref_name[num_rev]; num_rev++) {
842 unsigned char revkey[20];
843 unsigned int flag = 1u << (num_rev + REV_SHIFT);
844 if (MAX_REVS <= num_rev)
846 die("cannot handle more than %d revs.", MAX_REVS);
847 if (get_sha1(ref_name[num_rev], revkey))
848 die("'%s' is not a valid ref.", ref_name[num_rev]);
849 commit = lookup_commit_reference(revkey);
850 if (!commit)
851 die("cannot find commit %s (%s)",
852 ref_name[num_rev], revkey);
853 parse_commit(commit);
854 mark_seen(commit, &seen);
855 /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
857 * and so on. REV_SHIFT bits from bit 0 are used for
858 * internal bookkeeping.
859 */
860 commit->object.flags |= flag;
861 if (commit->object.flags == flag)
862 commit_list_insert_by_date(commit, &list);
863 rev[num_rev] = commit;
864 }
865 for (i = 0; i < num_rev; i++)
866 rev_mask[i] = rev[i]->object.flags;
867 if (0 <= extra)
869 join_revs(&list, &seen, num_rev, extra);
870 commit_list_sort_by_date(&seen);
872 if (merge_base)
874 return show_merge_base(seen, num_rev);
875 if (independent)
877 return show_independent(rev, num_rev, ref_name, rev_mask);
878 /* Show list; --more=-1 means list-only */
880 if (1 < num_rev || extra < 0) {
881 for (i = 0; i < num_rev; i++) {
882 int j;
883 int is_head = rev_is_head(head,
884 head_len,
885 ref_name[i],
886 head_sha1,
887 rev[i]->object.sha1);
888 if (extra < 0)
889 printf("%c [%s] ",
890 is_head ? '*' : ' ', ref_name[i]);
891 else {
892 for (j = 0; j < i; j++)
893 putchar(' ');
894 printf("%s%c%s [%s] ",
895 get_color_code(i % COLUMN_COLORS_MAX),
896 is_head ? '*' : '!',
897 get_color_reset_code(), ref_name[i]);
898 }
899 if (!reflog) {
901 /* header lines never need name */
902 show_one_commit(rev[i], 1);
903 }
904 else
905 puts(reflog_msg[i]);
906 if (is_head)
908 head_at = i;
909 }
910 if (0 <= extra) {
911 for (i = 0; i < num_rev; i++)
912 putchar('-');
913 putchar('\n');
914 }
915 }
916 if (extra < 0)
917 exit(0);
918 /* Sort topologically */
920 sort_in_topological_order(&seen, lifo);
921 /* Give names to commits */
923 if (!sha1_name && !no_name)
924 name_commits(seen, rev, ref_name, num_rev);
925 all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
927 all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
928 while (seen) {
930 struct commit *commit = pop_one_commit(&seen);
931 int this_flag = commit->object.flags;
932 int is_merge_point = ((this_flag & all_revs) == all_revs);
933 shown_merge_point |= is_merge_point;
935 if (1 < num_rev) {
937 int is_merge = !!(commit->parents &&
938 commit->parents->next);
939 if (topics &&
940 !is_merge_point &&
941 (this_flag & (1u << REV_SHIFT)))
942 continue;
943 if (dense && is_merge &&
944 omit_in_dense(commit, rev, num_rev))
945 continue;
946 for (i = 0; i < num_rev; i++) {
947 int mark;
948 if (!(this_flag & (1u << (i + REV_SHIFT))))
949 mark = ' ';
950 else if (is_merge)
951 mark = '-';
952 else if (i == head_at)
953 mark = '*';
954 else
955 mark = '+';
956 printf("%s%c%s",
957 get_color_code(i % COLUMN_COLORS_MAX),
958 mark, get_color_reset_code());
959 }
960 putchar(' ');
961 }
962 show_one_commit(commit, no_name);
963 if (shown_merge_point && --extra < 0)
965 break;
966 }
967 return 0;
968}