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 N_("git show-branch [-a | --all] [-r | --remotes] [--topo-order | --date-order]\n"
10 " [--current] [--color[=<when>] | --no-color] [--sparse]\n"
11 " [--more=<n> | --list | --independent | --merge-base]\n"
12 " [--no-name | --sha1-name] [--topics] [(<rev> | <glob>)...]"),
13 N_("git show-branch (-g | --reflog)[=<n>[,<base>]] [--list] [<ref>]"),
14 NULL
15};
16static int showbranch_use_color = -1;
18static int default_num;
20static int default_alloc;
21static const char **default_arg;
22#define UNINTERESTING 01
24#define REV_SHIFT 2
26#define MAX_REVS (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */
27#define DEFAULT_REFLOG 4
29static const char *get_color_code(int idx)
31{
32 if (want_color(showbranch_use_color))
33 return column_colors_ansi[idx % column_colors_ansi_max];
34 return "";
35}
36static const char *get_color_reset_code(void)
38{
39 if (want_color(showbranch_use_color))
40 return GIT_COLOR_RESET;
41 return "";
42}
43static struct commit *interesting(struct commit_list *list)
45{
46 while (list) {
47 struct commit *commit = list->item;
48 list = list->next;
49 if (commit->object.flags & UNINTERESTING)
50 continue;
51 return commit;
52 }
53 return NULL;
54}
55static struct commit *pop_one_commit(struct commit_list **list_p)
57{
58 struct commit *commit;
59 struct commit_list *list;
60 list = *list_p;
61 commit = list->item;
62 *list_p = list->next;
63 free(list);
64 return commit;
65}
66struct commit_name {
68 const char *head_name; /* which head's ancestor? */
69 int generation; /* how many parents away from head_name */
70};
71/* Name the commit as nth generation ancestor of head_name;
73 * we count only the first-parent relationship for naming purposes.
74 */
75static void name_commit(struct commit *commit, const char *head_name, int nth)
76{
77 struct commit_name *name;
78 if (!commit->util)
79 commit->util = xmalloc(sizeof(struct commit_name));
80 name = commit->util;
81 name->head_name = head_name;
82 name->generation = nth;
83}
84/* Parent is the first parent of the commit. We may name it
86 * as (n+1)th generation ancestor of the same head_name as
87 * commit is nth generation ancestor of, if that generation
88 * number is better than the name it already has.
89 */
90static void name_parent(struct commit *commit, struct commit *parent)
91{
92 struct commit_name *commit_name = commit->util;
93 struct commit_name *parent_name = parent->util;
94 if (!commit_name)
95 return;
96 if (!parent_name ||
97 commit_name->generation + 1 < parent_name->generation)
98 name_commit(parent, commit_name->head_name,
99 commit_name->generation + 1);
100}
101static int name_first_parent_chain(struct commit *c)
103{
104 int i = 0;
105 while (c) {
106 struct commit *p;
107 if (!c->util)
108 break;
109 if (!c->parents)
110 break;
111 p = c->parents->item;
112 if (!p->util) {
113 name_parent(c, p);
114 i++;
115 }
116 else
117 break;
118 c = p;
119 }
120 return i;
121}
122static void name_commits(struct commit_list *list,
124 struct commit **rev,
125 char **ref_name,
126 int num_rev)
127{
128 struct commit_list *cl;
129 struct commit *c;
130 int i;
131 /* First give names to the given heads */
133 for (cl = list; cl; cl = cl->next) {
134 c = cl->item;
135 if (c->util)
136 continue;
137 for (i = 0; i < num_rev; i++) {
138 if (rev[i] == c) {
139 name_commit(c, ref_name[i], 0);
140 break;
141 }
142 }
143 }
144 /* Then commits on the first parent ancestry chain */
146 do {
147 i = 0;
148 for (cl = list; cl; cl = cl->next) {
149 i += name_first_parent_chain(cl->item);
150 }
151 } while (i);
152 /* Finally, any unnamed commits */
154 do {
155 i = 0;
156 for (cl = list; cl; cl = cl->next) {
157 struct commit_list *parents;
158 struct commit_name *n;
159 int nth;
160 c = cl->item;
161 if (!c->util)
162 continue;
163 n = c->util;
164 parents = c->parents;
165 nth = 0;
166 while (parents) {
167 struct commit *p = parents->item;
168 struct strbuf newname = STRBUF_INIT;
169 parents = parents->next;
170 nth++;
171 if (p->util)
172 continue;
173 switch (n->generation) {
174 case 0:
175 strbuf_addstr(&newname, n->head_name);
176 break;
177 case 1:
178 strbuf_addf(&newname, "%s^", n->head_name);
179 break;
180 default:
181 strbuf_addf(&newname, "%s~%d",
182 n->head_name, n->generation);
183 break;
184 }
185 if (nth == 1)
186 strbuf_addch(&newname, '^');
187 else
188 strbuf_addf(&newname, "^%d", nth);
189 name_commit(p, strbuf_detach(&newname, NULL), 0);
190 i++;
191 name_first_parent_chain(p);
192 }
193 }
194 } while (i);
195}
196static int mark_seen(struct commit *commit, struct commit_list **seen_p)
198{
199 if (!commit->object.flags) {
200 commit_list_insert(commit, seen_p);
201 return 1;
202 }
203 return 0;
204}
205static void join_revs(struct commit_list **list_p,
207 struct commit_list **seen_p,
208 int num_rev, int extra)
209{
210 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
211 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
212 while (*list_p) {
214 struct commit_list *parents;
215 int still_interesting = !!interesting(*list_p);
216 struct commit *commit = pop_one_commit(list_p);
217 int flags = commit->object.flags & all_mask;
218 if (!still_interesting && extra <= 0)
220 break;
221 mark_seen(commit, seen_p);
223 if ((flags & all_revs) == all_revs)
224 flags |= UNINTERESTING;
225 parents = commit->parents;
226 while (parents) {
228 struct commit *p = parents->item;
229 int this_flag = p->object.flags;
230 parents = parents->next;
231 if ((this_flag & flags) == flags)
232 continue;
233 parse_commit(p);
234 if (mark_seen(p, seen_p) && !still_interesting)
235 extra--;
236 p->object.flags |= flags;
237 commit_list_insert_by_date(p, list_p);
238 }
239 }
240 /*
242 * Postprocess to complete well-poisoning.
243 *
244 * At this point we have all the commits we have seen in
245 * seen_p list. Mark anything that can be reached from
246 * uninteresting commits not interesting.
247 */
248 for (;;) {
249 int changed = 0;
250 struct commit_list *s;
251 for (s = *seen_p; s; s = s->next) {
252 struct commit *c = s->item;
253 struct commit_list *parents;
254 if (((c->object.flags & all_revs) != all_revs) &&
256 !(c->object.flags & UNINTERESTING))
257 continue;
258 /* The current commit is either a merge base or
260 * already uninteresting one. Mark its parents
261 * as uninteresting commits _only_ if they are
262 * already parsed. No reason to find new ones
263 * here.
264 */
265 parents = c->parents;
266 while (parents) {
267 struct commit *p = parents->item;
268 parents = parents->next;
269 if (!(p->object.flags & UNINTERESTING)) {
270 p->object.flags |= UNINTERESTING;
271 changed = 1;
272 }
273 }
274 }
275 if (!changed)
276 break;
277 }
278}
279static void show_one_commit(struct commit *commit, int no_name)
281{
282 struct strbuf pretty = STRBUF_INIT;
283 const char *pretty_str = "(unavailable)";
284 struct commit_name *name = commit->util;
285 if (commit->object.parsed) {
287 pp_commit_easy(CMIT_FMT_ONELINE, commit, &pretty);
288 pretty_str = pretty.buf;
289 }
290 if (starts_with(pretty_str, "[PATCH] "))
291 pretty_str += 8;
292 if (!no_name) {
294 if (name && name->head_name) {
295 printf("[%s", name->head_name);
296 if (name->generation) {
297 if (name->generation == 1)
298 printf("^");
299 else
300 printf("~%d", name->generation);
301 }
302 printf("] ");
303 }
304 else
305 printf("[%s] ",
306 find_unique_abbrev(commit->object.sha1,
307 DEFAULT_ABBREV));
308 }
309 puts(pretty_str);
310 strbuf_release(&pretty);
311}
312static char *ref_name[MAX_REVS + 1];
314static int ref_name_cnt;
315static const char *find_digit_prefix(const char *s, int *v)
317{
318 const char *p;
319 int ver;
320 char ch;
321 for (p = s, ver = 0;
323 '0' <= (ch = *p) && ch <= '9';
324 p++)
325 ver = ver * 10 + ch - '0';
326 *v = ver;
327 return p;
328}
329static int version_cmp(const char *a, const char *b)
332{
333 while (1) {
334 int va, vb;
335 a = find_digit_prefix(a, &va);
337 b = find_digit_prefix(b, &vb);
338 if (va != vb)
339 return va - vb;
340 while (1) {
342 int ca = *a;
343 int cb = *b;
344 if ('0' <= ca && ca <= '9')
345 ca = 0;
346 if ('0' <= cb && cb <= '9')
347 cb = 0;
348 if (ca != cb)
349 return ca - cb;
350 if (!ca)
351 break;
352 a++;
353 b++;
354 }
355 if (!*a && !*b)
356 return 0;
357 }
358}
359static int compare_ref_name(const void *a_, const void *b_)
361{
362 const char * const*a = a_, * const*b = b_;
363 return version_cmp(*a, *b);
364}
365static void sort_ref_range(int bottom, int top)
367{
368 qsort(ref_name + bottom, top - bottom, sizeof(ref_name[0]),
369 compare_ref_name);
370}
371static int append_ref(const char *refname, const struct object_id *oid,
373 int allow_dups)
374{
375 struct commit *commit = lookup_commit_reference_gently(oid->hash, 1);
376 int i;
377 if (!commit)
379 return 0;
380 if (!allow_dups) {
382 /* Avoid adding the same thing twice */
383 for (i = 0; i < ref_name_cnt; i++)
384 if (!strcmp(refname, ref_name[i]))
385 return 0;
386 }
387 if (MAX_REVS <= ref_name_cnt) {
388 warning("ignoring %s; cannot handle more than %d refs",
389 refname, MAX_REVS);
390 return 0;
391 }
392 ref_name[ref_name_cnt++] = xstrdup(refname);
393 ref_name[ref_name_cnt] = NULL;
394 return 0;
395}
396static int append_head_ref(const char *refname, const struct object_id *oid,
398 int flag, void *cb_data)
399{
400 struct object_id tmp;
401 int ofs = 11;
402 if (!starts_with(refname, "refs/heads/"))
403 return 0;
404 /* If both heads/foo and tags/foo exists, get_sha1 would
405 * get confused.
406 */
407 if (get_sha1(refname + ofs, tmp.hash) || oidcmp(&tmp, oid))
408 ofs = 5;
409 return append_ref(refname + ofs, oid, 0);
410}
411static int append_remote_ref(const char *refname, const struct object_id *oid,
413 int flag, void *cb_data)
414{
415 struct object_id tmp;
416 int ofs = 13;
417 if (!starts_with(refname, "refs/remotes/"))
418 return 0;
419 /* If both heads/foo and tags/foo exists, get_sha1 would
420 * get confused.
421 */
422 if (get_sha1(refname + ofs, tmp.hash) || oidcmp(&tmp, oid))
423 ofs = 5;
424 return append_ref(refname + ofs, oid, 0);
425}
426static int append_tag_ref(const char *refname, const struct object_id *oid,
428 int flag, void *cb_data)
429{
430 if (!starts_with(refname, "refs/tags/"))
431 return 0;
432 return append_ref(refname + 5, oid, 0);
433}
434static const char *match_ref_pattern = NULL;
436static int match_ref_slash = 0;
437static int count_slash(const char *s)
438{
439 int cnt = 0;
440 while (*s)
441 if (*s++ == '/')
442 cnt++;
443 return cnt;
444}
445static int append_matching_ref(const char *refname, const struct object_id *oid,
447 int flag, void *cb_data)
448{
449 /* we want to allow pattern hold/<asterisk> to show all
450 * branches under refs/heads/hold/, and v0.99.9? to show
451 * refs/tags/v0.99.9a and friends.
452 */
453 const char *tail;
454 int slash = count_slash(refname);
455 for (tail = refname; *tail && match_ref_slash < slash; )
456 if (*tail++ == '/')
457 slash--;
458 if (!*tail)
459 return 0;
460 if (wildmatch(match_ref_pattern, tail, 0, NULL))
461 return 0;
462 if (starts_with(refname, "refs/heads/"))
463 return append_head_ref(refname, oid, flag, cb_data);
464 if (starts_with(refname, "refs/tags/"))
465 return append_tag_ref(refname, oid, flag, cb_data);
466 return append_ref(refname, oid, 0);
467}
468static void snarf_refs(int head, int remotes)
470{
471 if (head) {
472 int orig_cnt = ref_name_cnt;
473 for_each_ref(append_head_ref, NULL);
475 sort_ref_range(orig_cnt, ref_name_cnt);
476 }
477 if (remotes) {
478 int orig_cnt = ref_name_cnt;
479 for_each_ref(append_remote_ref, NULL);
481 sort_ref_range(orig_cnt, ref_name_cnt);
482 }
483}
484static int rev_is_head(char *head, int headlen, char *name,
486 unsigned char *head_sha1, unsigned char *sha1)
487{
488 if ((!head[0]) ||
489 (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
490 return 0;
491 if (starts_with(head, "refs/heads/"))
492 head += 11;
493 if (starts_with(name, "refs/heads/"))
494 name += 11;
495 else if (starts_with(name, "heads/"))
496 name += 6;
497 return !strcmp(head, name);
498}
499static int show_merge_base(struct commit_list *seen, int num_rev)
501{
502 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
503 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
504 int exit_status = 1;
505 while (seen) {
507 struct commit *commit = pop_one_commit(&seen);
508 int flags = commit->object.flags & all_mask;
509 if (!(flags & UNINTERESTING) &&
510 ((flags & all_revs) == all_revs)) {
511 puts(sha1_to_hex(commit->object.sha1));
512 exit_status = 0;
513 commit->object.flags |= UNINTERESTING;
514 }
515 }
516 return exit_status;
517}
518static int show_independent(struct commit **rev,
520 int num_rev,
521 char **ref_name,
522 unsigned int *rev_mask)
523{
524 int i;
525 for (i = 0; i < num_rev; i++) {
527 struct commit *commit = rev[i];
528 unsigned int flag = rev_mask[i];
529 if (commit->object.flags == flag)
531 puts(sha1_to_hex(commit->object.sha1));
532 commit->object.flags |= UNINTERESTING;
533 }
534 return 0;
535}
536static void append_one_rev(const char *av)
538{
539 struct object_id revkey;
540 if (!get_sha1(av, revkey.hash)) {
541 append_ref(av, &revkey, 0);
542 return;
543 }
544 if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
545 /* glob style match */
546 int saved_matches = ref_name_cnt;
547 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}
560static 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 /*
567 * default_arg is now passed to parse_options(), so we need to
568 * mimic the real argv a bit better.
569 */
570 if (!default_num) {
571 default_alloc = 20;
572 default_arg = xcalloc(default_alloc, sizeof(*default_arg));
573 default_arg[default_num++] = "show-branch";
574 } else if (default_alloc <= default_num + 1) {
575 default_alloc = default_alloc * 3 / 2 + 20;
576 REALLOC_ARRAY(default_arg, default_alloc);
577 }
578 default_arg[default_num++] = xstrdup(value);
579 default_arg[default_num] = NULL;
580 return 0;
581 }
582 if (!strcmp(var, "color.showbranch")) {
584 showbranch_use_color = git_config_colorbool(var, value);
585 return 0;
586 }
587 return git_color_default_config(var, value, cb);
589}
590static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
592{
593 /* If the commit is tip of the named branches, do not
594 * omit it.
595 * Otherwise, if it is a merge that is reachable from only one
596 * tip, it is not that interesting.
597 */
598 int i, flag, count;
599 for (i = 0; i < n; i++)
600 if (rev[i] == commit)
601 return 0;
602 flag = commit->object.flags;
603 for (i = count = 0; i < n; i++) {
604 if (flag & (1u << (i + REV_SHIFT)))
605 count++;
606 }
607 if (count == 1)
608 return 1;
609 return 0;
610}
611static int reflog = 0;
613static int parse_reflog_param(const struct option *opt, const char *arg,
615 int unset)
616{
617 char *ep;
618 const char **base = (const char **)opt->value;
619 if (!arg)
620 arg = "";
621 reflog = strtoul(arg, &ep, 10);
622 if (*ep == ',')
623 *base = ep + 1;
624 else if (*ep)
625 return error("unrecognized reflog param '%s'", arg);
626 else
627 *base = NULL;
628 if (reflog <= 0)
629 reflog = DEFAULT_REFLOG;
630 return 0;
631}
632int cmd_show_branch(int ac, const char **av, const char *prefix)
634{
635 struct commit *rev[MAX_REVS], *commit;
636 char *reflog_msg[MAX_REVS];
637 struct commit_list *list = NULL, *seen = NULL;
638 unsigned int rev_mask[MAX_REVS];
639 int num_rev, i, extra = 0;
640 int all_heads = 0, all_remotes = 0;
641 int all_mask, all_revs;
642 enum rev_sort_order sort_order = REV_SORT_IN_GRAPH_ORDER;
643 char head[128];
644 const char *head_p;
645 int head_len;
646 struct object_id head_oid;
647 int merge_base = 0;
648 int independent = 0;
649 int no_name = 0;
650 int sha1_name = 0;
651 int shown_merge_point = 0;
652 int with_current_branch = 0;
653 int head_at = -1;
654 int topics = 0;
655 int dense = 1;
656 const char *reflog_base = NULL;
657 struct option builtin_show_branch_options[] = {
658 OPT_BOOL('a', "all", &all_heads,
659 N_("show remote-tracking and local branches")),
660 OPT_BOOL('r', "remotes", &all_remotes,
661 N_("show remote-tracking branches")),
662 OPT__COLOR(&showbranch_use_color,
663 N_("color '*!+-' corresponding to the branch")),
664 { OPTION_INTEGER, 0, "more", &extra, N_("n"),
665 N_("show <n> more commits after the common ancestor"),
666 PARSE_OPT_OPTARG, NULL, (intptr_t)1 },
667 OPT_SET_INT(0, "list", &extra, N_("synonym to more=-1"), -1),
668 OPT_BOOL(0, "no-name", &no_name, N_("suppress naming strings")),
669 OPT_BOOL(0, "current", &with_current_branch,
670 N_("include the current branch")),
671 OPT_BOOL(0, "sha1-name", &sha1_name,
672 N_("name commits with their object names")),
673 OPT_BOOL(0, "merge-base", &merge_base,
674 N_("show possible merge bases")),
675 OPT_BOOL(0, "independent", &independent,
676 N_("show refs unreachable from any other ref")),
677 OPT_SET_INT(0, "topo-order", &sort_order,
678 N_("show commits in topological order"),
679 REV_SORT_IN_GRAPH_ORDER),
680 OPT_BOOL(0, "topics", &topics,
681 N_("show only commits not on the first branch")),
682 OPT_SET_INT(0, "sparse", &dense,
683 N_("show merges reachable from only one tip"), 0),
684 OPT_SET_INT(0, "date-order", &sort_order,
685 N_("topologically sort, maintaining date order "
686 "where possible"),
687 REV_SORT_BY_COMMIT_DATE),
688 { OPTION_CALLBACK, 'g', "reflog", &reflog_base, N_("<n>[,<base>]"),
689 N_("show <n> most recent ref-log entries starting at "
690 "base"),
691 PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP,
692 parse_reflog_param },
693 OPT_END()
694 };
695 git_config(git_show_branch_config, NULL);
697 /* If nothing is specified, try the default first */
699 if (ac == 1 && default_num) {
700 ac = default_num;
701 av = default_arg;
702 }
703 ac = parse_options(ac, av, prefix, builtin_show_branch_options,
705 show_branch_usage, PARSE_OPT_STOP_AT_NON_OPTION);
706 if (all_heads)
707 all_remotes = 1;
708 if (extra || reflog) {
710 /* "listing" mode is incompatible with
711 * independent nor merge-base modes.
712 */
713 if (independent || merge_base)
714 usage_with_options(show_branch_usage,
715 builtin_show_branch_options);
716 if (reflog && ((0 < extra) || all_heads || all_remotes))
717 /*
718 * Asking for --more in reflog mode does not
719 * make sense. --list is Ok.
720 *
721 * Also --all and --remotes do not make sense either.
722 */
723 die("--reflog is incompatible with --all, --remotes, "
724 "--independent or --merge-base");
725 }
726 /* If nothing is specified, show all branches by default */
728 if (ac <= topics && all_heads + all_remotes == 0)
729 all_heads = 1;
730 if (reflog) {
732 struct object_id oid;
733 char nth_desc[256];
734 char *ref;
735 int base = 0;
736 unsigned int flags = 0;
737 if (ac == 0) {
739 static const char *fake_av[2];
740 fake_av[0] = resolve_refdup("HEAD",
742 RESOLVE_REF_READING,
743 oid.hash, NULL);
744 fake_av[1] = NULL;
745 av = fake_av;
746 ac = 1;
747 }
748 if (ac != 1)
749 die("--reflog option needs one branch name");
750 if (MAX_REVS < reflog)
752 die("Only %d entries can be shown at one time.",
753 MAX_REVS);
754 if (!dwim_ref(*av, strlen(*av), oid.hash, &ref))
755 die("No such ref %s", *av);
756 /* Has the base been specified? */
758 if (reflog_base) {
759 char *ep;
760 base = strtoul(reflog_base, &ep, 10);
761 if (*ep) {
762 /* Ah, that is a date spec... */
763 unsigned long at;
764 at = approxidate(reflog_base);
765 read_ref_at(ref, flags, at, -1, oid.hash, NULL,
766 NULL, NULL, &base);
767 }
768 }
769 for (i = 0; i < reflog; i++) {
771 char *logmsg;
772 const char *msg;
773 unsigned long timestamp;
774 int tz;
775 if (read_ref_at(ref, flags, 0, base+i, oid.hash, &logmsg,
777 ×tamp, &tz, NULL)) {
778 reflog = i;
779 break;
780 }
781 msg = strchr(logmsg, '\t');
782 if (!msg)
783 msg = "(none)";
784 else
785 msg++;
786 reflog_msg[i] = xstrfmt("(%s) %s",
787 show_date(timestamp, tz,
788 DATE_MODE(RELATIVE)),
789 msg);
790 free(logmsg);
791 sprintf(nth_desc, "%s@{%d}", *av, base+i);
792 append_ref(nth_desc, &oid, 1);
793 }
794 free(ref);
795 }
796 else {
797 while (0 < ac) {
798 append_one_rev(*av);
799 ac--; av++;
800 }
801 if (all_heads + all_remotes)
802 snarf_refs(all_heads, all_remotes);
803 }
804 head_p = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
806 head_oid.hash, NULL);
807 if (head_p) {
808 head_len = strlen(head_p);
809 memcpy(head, head_p, head_len + 1);
810 }
811 else {
812 head_len = 0;
813 head[0] = 0;
814 }
815 if (with_current_branch && head_p) {
817 int has_head = 0;
818 for (i = 0; !has_head && i < ref_name_cnt; i++) {
819 /* We are only interested in adding the branch
820 * HEAD points at.
821 */
822 if (rev_is_head(head,
823 head_len,
824 ref_name[i],
825 head_oid.hash, NULL))
826 has_head++;
827 }
828 if (!has_head) {
829 int offset = starts_with(head, "refs/heads/") ? 11 : 0;
830 append_one_rev(head + offset);
831 }
832 }
833 if (!ref_name_cnt) {
835 fprintf(stderr, "No revs to be shown.\n");
836 exit(0);
837 }
838 for (num_rev = 0; ref_name[num_rev]; num_rev++) {
840 struct object_id revkey;
841 unsigned int flag = 1u << (num_rev + REV_SHIFT);
842 if (MAX_REVS <= num_rev)
844 die("cannot handle more than %d revs.", MAX_REVS);
845 if (get_sha1(ref_name[num_rev], revkey.hash))
846 die("'%s' is not a valid ref.", ref_name[num_rev]);
847 commit = lookup_commit_reference(revkey.hash);
848 if (!commit)
849 die("cannot find commit %s (%s)",
850 ref_name[num_rev], oid_to_hex(&revkey));
851 parse_commit(commit);
852 mark_seen(commit, &seen);
853 /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
855 * and so on. REV_SHIFT bits from bit 0 are used for
856 * internal bookkeeping.
857 */
858 commit->object.flags |= flag;
859 if (commit->object.flags == flag)
860 commit_list_insert_by_date(commit, &list);
861 rev[num_rev] = commit;
862 }
863 for (i = 0; i < num_rev; i++)
864 rev_mask[i] = rev[i]->object.flags;
865 if (0 <= extra)
867 join_revs(&list, &seen, num_rev, extra);
868 commit_list_sort_by_date(&seen);
870 if (merge_base)
872 return show_merge_base(seen, num_rev);
873 if (independent)
875 return show_independent(rev, num_rev, ref_name, rev_mask);
876 /* Show list; --more=-1 means list-only */
878 if (1 < num_rev || extra < 0) {
879 for (i = 0; i < num_rev; i++) {
880 int j;
881 int is_head = rev_is_head(head,
882 head_len,
883 ref_name[i],
884 head_oid.hash,
885 rev[i]->object.sha1);
886 if (extra < 0)
887 printf("%c [%s] ",
888 is_head ? '*' : ' ', ref_name[i]);
889 else {
890 for (j = 0; j < i; j++)
891 putchar(' ');
892 printf("%s%c%s [%s] ",
893 get_color_code(i),
894 is_head ? '*' : '!',
895 get_color_reset_code(), ref_name[i]);
896 }
897 if (!reflog) {
899 /* header lines never need name */
900 show_one_commit(rev[i], 1);
901 }
902 else
903 puts(reflog_msg[i]);
904 if (is_head)
906 head_at = i;
907 }
908 if (0 <= extra) {
909 for (i = 0; i < num_rev; i++)
910 putchar('-');
911 putchar('\n');
912 }
913 }
914 if (extra < 0)
915 exit(0);
916 /* Sort topologically */
918 sort_in_topological_order(&seen, sort_order);
919 /* Give names to commits */
921 if (!sha1_name && !no_name)
922 name_commits(seen, rev, ref_name, num_rev);
923 all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
925 all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
926 while (seen) {
928 struct commit *commit = pop_one_commit(&seen);
929 int this_flag = commit->object.flags;
930 int is_merge_point = ((this_flag & all_revs) == all_revs);
931 shown_merge_point |= is_merge_point;
933 if (1 < num_rev) {
935 int is_merge = !!(commit->parents &&
936 commit->parents->next);
937 if (topics &&
938 !is_merge_point &&
939 (this_flag & (1u << REV_SHIFT)))
940 continue;
941 if (dense && is_merge &&
942 omit_in_dense(commit, rev, num_rev))
943 continue;
944 for (i = 0; i < num_rev; i++) {
945 int mark;
946 if (!(this_flag & (1u << (i + REV_SHIFT))))
947 mark = ' ';
948 else if (is_merge)
949 mark = '-';
950 else if (i == head_at)
951 mark = '*';
952 else
953 mark = '+';
954 printf("%s%c%s",
955 get_color_code(i),
956 mark, get_color_reset_code());
957 }
958 putchar(' ');
959 }
960 show_one_commit(commit, no_name);
961 if (shown_merge_point && --extra < 0)
963 break;
964 }
965 return 0;
966}