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 unsigned char *sha1,
373 int allow_dups)
374{
375 struct commit *commit = lookup_commit_reference_gently(sha1, 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 unsigned char *sha1, int flag, void *cb_data)
398{
399 unsigned char tmp[20];
400 int ofs = 11;
401 if (!starts_with(refname, "refs/heads/"))
402 return 0;
403 /* If both heads/foo and tags/foo exists, get_sha1 would
404 * get confused.
405 */
406 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
407 ofs = 5;
408 return append_ref(refname + ofs, sha1, 0);
409}
410static int append_remote_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
412{
413 unsigned char tmp[20];
414 int ofs = 13;
415 if (!starts_with(refname, "refs/remotes/"))
416 return 0;
417 /* If both heads/foo and tags/foo exists, get_sha1 would
418 * get confused.
419 */
420 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
421 ofs = 5;
422 return append_ref(refname + ofs, sha1, 0);
423}
424static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
426{
427 if (!starts_with(refname, "refs/tags/"))
428 return 0;
429 return append_ref(refname + 5, sha1, 0);
430}
431static const char *match_ref_pattern = NULL;
433static int match_ref_slash = 0;
434static int count_slash(const char *s)
435{
436 int cnt = 0;
437 while (*s)
438 if (*s++ == '/')
439 cnt++;
440 return cnt;
441}
442static int append_matching_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
444{
445 /* we want to allow pattern hold/<asterisk> to show all
446 * branches under refs/heads/hold/, and v0.99.9? to show
447 * refs/tags/v0.99.9a and friends.
448 */
449 const char *tail;
450 int slash = count_slash(refname);
451 for (tail = refname; *tail && match_ref_slash < slash; )
452 if (*tail++ == '/')
453 slash--;
454 if (!*tail)
455 return 0;
456 if (wildmatch(match_ref_pattern, tail, 0, NULL))
457 return 0;
458 if (starts_with(refname, "refs/heads/"))
459 return append_head_ref(refname, sha1, flag, cb_data);
460 if (starts_with(refname, "refs/tags/"))
461 return append_tag_ref(refname, sha1, flag, cb_data);
462 return append_ref(refname, sha1, 0);
463}
464static void snarf_refs(int head, int remotes)
466{
467 if (head) {
468 int orig_cnt = ref_name_cnt;
469 for_each_ref(append_head_ref, NULL);
470 sort_ref_range(orig_cnt, ref_name_cnt);
471 }
472 if (remotes) {
473 int orig_cnt = ref_name_cnt;
474 for_each_ref(append_remote_ref, NULL);
475 sort_ref_range(orig_cnt, ref_name_cnt);
476 }
477}
478static int rev_is_head(char *head, int headlen, char *name,
480 unsigned char *head_sha1, unsigned char *sha1)
481{
482 if ((!head[0]) ||
483 (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
484 return 0;
485 if (starts_with(head, "refs/heads/"))
486 head += 11;
487 if (starts_with(name, "refs/heads/"))
488 name += 11;
489 else if (starts_with(name, "heads/"))
490 name += 6;
491 return !strcmp(head, name);
492}
493static int show_merge_base(struct commit_list *seen, int num_rev)
495{
496 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
497 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
498 int exit_status = 1;
499 while (seen) {
501 struct commit *commit = pop_one_commit(&seen);
502 int flags = commit->object.flags & all_mask;
503 if (!(flags & UNINTERESTING) &&
504 ((flags & all_revs) == all_revs)) {
505 puts(sha1_to_hex(commit->object.sha1));
506 exit_status = 0;
507 commit->object.flags |= UNINTERESTING;
508 }
509 }
510 return exit_status;
511}
512static int show_independent(struct commit **rev,
514 int num_rev,
515 char **ref_name,
516 unsigned int *rev_mask)
517{
518 int i;
519 for (i = 0; i < num_rev; i++) {
521 struct commit *commit = rev[i];
522 unsigned int flag = rev_mask[i];
523 if (commit->object.flags == flag)
525 puts(sha1_to_hex(commit->object.sha1));
526 commit->object.flags |= UNINTERESTING;
527 }
528 return 0;
529}
530static void append_one_rev(const char *av)
532{
533 unsigned char revkey[20];
534 if (!get_sha1(av, revkey)) {
535 append_ref(av, revkey, 0);
536 return;
537 }
538 if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
539 /* glob style match */
540 int saved_matches = ref_name_cnt;
541 match_ref_pattern = av;
542 match_ref_slash = count_slash(av);
543 for_each_ref(append_matching_ref, NULL);
544 if (saved_matches == ref_name_cnt &&
545 ref_name_cnt < MAX_REVS)
546 error("no matching refs with %s", av);
547 if (saved_matches + 1 < ref_name_cnt)
548 sort_ref_range(saved_matches, ref_name_cnt);
549 return;
550 }
551 die("bad sha1 reference %s", av);
552}
553static int git_show_branch_config(const char *var, const char *value, void *cb)
555{
556 if (!strcmp(var, "showbranch.default")) {
557 if (!value)
558 return config_error_nonbool(var);
559 /*
560 * default_arg is now passed to parse_options(), so we need to
561 * mimic the real argv a bit better.
562 */
563 if (!default_num) {
564 default_alloc = 20;
565 default_arg = xcalloc(default_alloc, sizeof(*default_arg));
566 default_arg[default_num++] = "show-branch";
567 } else if (default_alloc <= default_num + 1) {
568 default_alloc = default_alloc * 3 / 2 + 20;
569 REALLOC_ARRAY(default_arg, default_alloc);
570 }
571 default_arg[default_num++] = xstrdup(value);
572 default_arg[default_num] = NULL;
573 return 0;
574 }
575 if (!strcmp(var, "color.showbranch")) {
577 showbranch_use_color = git_config_colorbool(var, value);
578 return 0;
579 }
580 return git_color_default_config(var, value, cb);
582}
583static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
585{
586 /* If the commit is tip of the named branches, do not
587 * omit it.
588 * Otherwise, if it is a merge that is reachable from only one
589 * tip, it is not that interesting.
590 */
591 int i, flag, count;
592 for (i = 0; i < n; i++)
593 if (rev[i] == commit)
594 return 0;
595 flag = commit->object.flags;
596 for (i = count = 0; i < n; i++) {
597 if (flag & (1u << (i + REV_SHIFT)))
598 count++;
599 }
600 if (count == 1)
601 return 1;
602 return 0;
603}
604static int reflog = 0;
606static int parse_reflog_param(const struct option *opt, const char *arg,
608 int unset)
609{
610 char *ep;
611 const char **base = (const char **)opt->value;
612 if (!arg)
613 arg = "";
614 reflog = strtoul(arg, &ep, 10);
615 if (*ep == ',')
616 *base = ep + 1;
617 else if (*ep)
618 return error("unrecognized reflog param '%s'", arg);
619 else
620 *base = NULL;
621 if (reflog <= 0)
622 reflog = DEFAULT_REFLOG;
623 return 0;
624}
625int cmd_show_branch(int ac, const char **av, const char *prefix)
627{
628 struct commit *rev[MAX_REVS], *commit;
629 char *reflog_msg[MAX_REVS];
630 struct commit_list *list = NULL, *seen = NULL;
631 unsigned int rev_mask[MAX_REVS];
632 int num_rev, i, extra = 0;
633 int all_heads = 0, all_remotes = 0;
634 int all_mask, all_revs;
635 enum rev_sort_order sort_order = REV_SORT_IN_GRAPH_ORDER;
636 char head[128];
637 const char *head_p;
638 int head_len;
639 unsigned char head_sha1[20];
640 int merge_base = 0;
641 int independent = 0;
642 int no_name = 0;
643 int sha1_name = 0;
644 int shown_merge_point = 0;
645 int with_current_branch = 0;
646 int head_at = -1;
647 int topics = 0;
648 int dense = 1;
649 const char *reflog_base = NULL;
650 struct option builtin_show_branch_options[] = {
651 OPT_BOOL('a', "all", &all_heads,
652 N_("show remote-tracking and local branches")),
653 OPT_BOOL('r', "remotes", &all_remotes,
654 N_("show remote-tracking branches")),
655 OPT__COLOR(&showbranch_use_color,
656 N_("color '*!+-' corresponding to the branch")),
657 { OPTION_INTEGER, 0, "more", &extra, N_("n"),
658 N_("show <n> more commits after the common ancestor"),
659 PARSE_OPT_OPTARG, NULL, (intptr_t)1 },
660 OPT_SET_INT(0, "list", &extra, N_("synonym to more=-1"), -1),
661 OPT_BOOL(0, "no-name", &no_name, N_("suppress naming strings")),
662 OPT_BOOL(0, "current", &with_current_branch,
663 N_("include the current branch")),
664 OPT_BOOL(0, "sha1-name", &sha1_name,
665 N_("name commits with their object names")),
666 OPT_BOOL(0, "merge-base", &merge_base,
667 N_("show possible merge bases")),
668 OPT_BOOL(0, "independent", &independent,
669 N_("show refs unreachable from any other ref")),
670 OPT_SET_INT(0, "topo-order", &sort_order,
671 N_("show commits in topological order"),
672 REV_SORT_IN_GRAPH_ORDER),
673 OPT_BOOL(0, "topics", &topics,
674 N_("show only commits not on the first branch")),
675 OPT_SET_INT(0, "sparse", &dense,
676 N_("show merges reachable from only one tip"), 0),
677 OPT_SET_INT(0, "date-order", &sort_order,
678 N_("topologically sort, maintaining date order "
679 "where possible"),
680 REV_SORT_BY_COMMIT_DATE),
681 { OPTION_CALLBACK, 'g', "reflog", &reflog_base, N_("<n>[,<base>]"),
682 N_("show <n> most recent ref-log entries starting at "
683 "base"),
684 PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP,
685 parse_reflog_param },
686 OPT_END()
687 };
688 git_config(git_show_branch_config, NULL);
690 /* If nothing is specified, try the default first */
692 if (ac == 1 && default_num) {
693 ac = default_num;
694 av = default_arg;
695 }
696 ac = parse_options(ac, av, prefix, builtin_show_branch_options,
698 show_branch_usage, PARSE_OPT_STOP_AT_NON_OPTION);
699 if (all_heads)
700 all_remotes = 1;
701 if (extra || reflog) {
703 /* "listing" mode is incompatible with
704 * independent nor merge-base modes.
705 */
706 if (independent || merge_base)
707 usage_with_options(show_branch_usage,
708 builtin_show_branch_options);
709 if (reflog && ((0 < extra) || all_heads || all_remotes))
710 /*
711 * Asking for --more in reflog mode does not
712 * make sense. --list is Ok.
713 *
714 * Also --all and --remotes do not make sense either.
715 */
716 die("--reflog is incompatible with --all, --remotes, "
717 "--independent or --merge-base");
718 }
719 /* If nothing is specified, show all branches by default */
721 if (ac + all_heads + all_remotes == 0)
722 all_heads = 1;
723 if (reflog) {
725 unsigned char sha1[20];
726 char *ref;
727 int base = 0;
728 unsigned int flags = 0;
729 if (ac == 0) {
731 static const char *fake_av[2];
732 fake_av[0] = resolve_refdup("HEAD",
734 RESOLVE_REF_READING,
735 sha1, NULL);
736 fake_av[1] = NULL;
737 av = fake_av;
738 ac = 1;
739 }
740 if (ac != 1)
741 die("--reflog option needs one branch name");
742 if (MAX_REVS < reflog)
744 die("Only %d entries can be shown at one time.",
745 MAX_REVS);
746 if (!dwim_ref(*av, strlen(*av), sha1, &ref))
747 die("No such ref %s", *av);
748 /* Has the base been specified? */
750 if (reflog_base) {
751 char *ep;
752 base = strtoul(reflog_base, &ep, 10);
753 if (*ep) {
754 /* Ah, that is a date spec... */
755 unsigned long at;
756 at = approxidate(reflog_base);
757 read_ref_at(ref, flags, at, -1, sha1, NULL,
758 NULL, NULL, &base);
759 }
760 }
761 for (i = 0; i < reflog; i++) {
763 char *logmsg;
764 char *nth_desc;
765 const char *msg;
766 unsigned long timestamp;
767 int tz;
768 if (read_ref_at(ref, flags, 0, base+i, sha1, &logmsg,
770 ×tamp, &tz, NULL)) {
771 reflog = i;
772 break;
773 }
774 msg = strchr(logmsg, '\t');
775 if (!msg)
776 msg = "(none)";
777 else
778 msg++;
779 reflog_msg[i] = xstrfmt("(%s) %s",
780 show_date(timestamp, tz, 1),
781 msg);
782 free(logmsg);
783 nth_desc = xstrfmt("%s@{%d}", *av, base+i);
785 append_ref(nth_desc, sha1, 1);
786 free(nth_desc);
787 }
788 free(ref);
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 head_p = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
800 head_sha1, NULL);
801 if (head_p) {
802 head_len = strlen(head_p);
803 memcpy(head, head_p, head_len + 1);
804 }
805 else {
806 head_len = 0;
807 head[0] = 0;
808 }
809 if (with_current_branch && head_p) {
811 int has_head = 0;
812 for (i = 0; !has_head && i < ref_name_cnt; i++) {
813 /* We are only interested in adding the branch
814 * HEAD points at.
815 */
816 if (rev_is_head(head,
817 head_len,
818 ref_name[i],
819 head_sha1, NULL))
820 has_head++;
821 }
822 if (!has_head) {
823 int offset = starts_with(head, "refs/heads/") ? 11 : 0;
824 append_one_rev(head + offset);
825 }
826 }
827 if (!ref_name_cnt) {
829 fprintf(stderr, "No revs to be shown.\n");
830 exit(0);
831 }
832 for (num_rev = 0; ref_name[num_rev]; num_rev++) {
834 unsigned char revkey[20];
835 unsigned int flag = 1u << (num_rev + REV_SHIFT);
836 if (MAX_REVS <= num_rev)
838 die("cannot handle more than %d revs.", MAX_REVS);
839 if (get_sha1(ref_name[num_rev], revkey))
840 die("'%s' is not a valid ref.", ref_name[num_rev]);
841 commit = lookup_commit_reference(revkey);
842 if (!commit)
843 die("cannot find commit %s (%s)",
844 ref_name[num_rev], revkey);
845 parse_commit(commit);
846 mark_seen(commit, &seen);
847 /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
849 * and so on. REV_SHIFT bits from bit 0 are used for
850 * internal bookkeeping.
851 */
852 commit->object.flags |= flag;
853 if (commit->object.flags == flag)
854 commit_list_insert_by_date(commit, &list);
855 rev[num_rev] = commit;
856 }
857 for (i = 0; i < num_rev; i++)
858 rev_mask[i] = rev[i]->object.flags;
859 if (0 <= extra)
861 join_revs(&list, &seen, num_rev, extra);
862 commit_list_sort_by_date(&seen);
864 if (merge_base)
866 return show_merge_base(seen, num_rev);
867 if (independent)
869 return show_independent(rev, num_rev, ref_name, rev_mask);
870 /* Show list; --more=-1 means list-only */
872 if (1 < num_rev || extra < 0) {
873 for (i = 0; i < num_rev; i++) {
874 int j;
875 int is_head = rev_is_head(head,
876 head_len,
877 ref_name[i],
878 head_sha1,
879 rev[i]->object.sha1);
880 if (extra < 0)
881 printf("%c [%s] ",
882 is_head ? '*' : ' ', ref_name[i]);
883 else {
884 for (j = 0; j < i; j++)
885 putchar(' ');
886 printf("%s%c%s [%s] ",
887 get_color_code(i),
888 is_head ? '*' : '!',
889 get_color_reset_code(), ref_name[i]);
890 }
891 if (!reflog) {
893 /* header lines never need name */
894 show_one_commit(rev[i], 1);
895 }
896 else
897 puts(reflog_msg[i]);
898 if (is_head)
900 head_at = i;
901 }
902 if (0 <= extra) {
903 for (i = 0; i < num_rev; i++)
904 putchar('-');
905 putchar('\n');
906 }
907 }
908 if (extra < 0)
909 exit(0);
910 /* Sort topologically */
912 sort_in_topological_order(&seen, sort_order);
913 /* Give names to commits */
915 if (!sha1_name && !no_name)
916 name_commits(seen, rev, ref_name, num_rev);
917 all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
919 all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
920 while (seen) {
922 struct commit *commit = pop_one_commit(&seen);
923 int this_flag = commit->object.flags;
924 int is_merge_point = ((this_flag & all_revs) == all_revs);
925 shown_merge_point |= is_merge_point;
927 if (1 < num_rev) {
929 int is_merge = !!(commit->parents &&
930 commit->parents->next);
931 if (topics &&
932 !is_merge_point &&
933 (this_flag & (1u << REV_SHIFT)))
934 continue;
935 if (dense && is_merge &&
936 omit_in_dense(commit, rev, num_rev))
937 continue;
938 for (i = 0; i < num_rev; i++) {
939 int mark;
940 if (!(this_flag & (1u << (i + REV_SHIFT))))
941 mark = ' ';
942 else if (is_merge)
943 mark = '-';
944 else if (i == head_at)
945 mark = '*';
946 else
947 mark = '+';
948 printf("%s%c%s",
949 get_color_code(i),
950 mark, get_color_reset_code());
951 }
952 putchar(' ');
953 }
954 show_one_commit(commit, no_name);
955 if (shown_merge_point && --extra < 0)
957 break;
958 }
959 return 0;
960}