Keep "git --git-dir" from causing a bus error.
[git/git.git] / builtin-show-branch.c
CommitLineData
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1#include "cache.h"
2#include "commit.h"
3#include "refs.h"
51ce34b9 4#include "builtin.h"
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5
6static const char show_branch_usage[] =
7e3fe904 7"git-show-branch [--sparse] [--current] [--all] [--heads] [--tags] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...] | --reflog[=n] <branch>";
f76412ed 8
96f1e58f
DR
9static int default_num;
10static int default_alloc;
11static const char **default_arg;
c2bdd6af 12
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13#define UNINTERESTING 01
14
15#define REV_SHIFT 2
885a86ab 16#define MAX_REVS (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */
f76412ed 17
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18#define DEFAULT_REFLOG 4
19
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20static struct commit *interesting(struct commit_list *list)
21{
22 while (list) {
23 struct commit *commit = list->item;
24 list = list->next;
25 if (commit->object.flags & UNINTERESTING)
26 continue;
27 return commit;
28 }
29 return NULL;
30}
31
32static struct commit *pop_one_commit(struct commit_list **list_p)
33{
34 struct commit *commit;
35 struct commit_list *list;
36 list = *list_p;
37 commit = list->item;
38 *list_p = list->next;
39 free(list);
40 return commit;
41}
42
43struct commit_name {
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44 const char *head_name; /* which head's ancestor? */
45 int generation; /* how many parents away from head_name */
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46};
47
8e5dd22b 48/* Name the commit as nth generation ancestor of head_name;
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49 * we count only the first-parent relationship for naming purposes.
50 */
8e5dd22b 51static void name_commit(struct commit *commit, const char *head_name, int nth)
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52{
53 struct commit_name *name;
d3ff6f55
LT
54 if (!commit->util)
55 commit->util = xmalloc(sizeof(struct commit_name));
56 name = commit->util;
8e5dd22b 57 name->head_name = head_name;
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58 name->generation = nth;
59}
60
61/* Parent is the first parent of the commit. We may name it
8e5dd22b 62 * as (n+1)th generation ancestor of the same head_name as
bcaf60b2 63 * commit is nth generation ancestor of, if that generation
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64 * number is better than the name it already has.
65 */
66static void name_parent(struct commit *commit, struct commit *parent)
67{
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LT
68 struct commit_name *commit_name = commit->util;
69 struct commit_name *parent_name = parent->util;
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70 if (!commit_name)
71 return;
72 if (!parent_name ||
73 commit_name->generation + 1 < parent_name->generation)
8e5dd22b 74 name_commit(parent, commit_name->head_name,
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75 commit_name->generation + 1);
76}
77
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78static int name_first_parent_chain(struct commit *c)
79{
80 int i = 0;
81 while (c) {
82 struct commit *p;
d3ff6f55 83 if (!c->util)
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84 break;
85 if (!c->parents)
86 break;
87 p = c->parents->item;
d3ff6f55 88 if (!p->util) {
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89 name_parent(c, p);
90 i++;
91 }
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92 else
93 break;
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94 c = p;
95 }
96 return i;
97}
98
99static void name_commits(struct commit_list *list,
100 struct commit **rev,
101 char **ref_name,
102 int num_rev)
103{
104 struct commit_list *cl;
105 struct commit *c;
106 int i;
107
108 /* First give names to the given heads */
109 for (cl = list; cl; cl = cl->next) {
110 c = cl->item;
d3ff6f55 111 if (c->util)
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112 continue;
113 for (i = 0; i < num_rev; i++) {
114 if (rev[i] == c) {
115 name_commit(c, ref_name[i], 0);
116 break;
117 }
118 }
119 }
120
121 /* Then commits on the first parent ancestry chain */
122 do {
123 i = 0;
124 for (cl = list; cl; cl = cl->next) {
125 i += name_first_parent_chain(cl->item);
126 }
127 } while (i);
128
129 /* Finally, any unnamed commits */
130 do {
131 i = 0;
132 for (cl = list; cl; cl = cl->next) {
133 struct commit_list *parents;
134 struct commit_name *n;
135 int nth;
136 c = cl->item;
d3ff6f55 137 if (!c->util)
8e5dd22b 138 continue;
d3ff6f55 139 n = c->util;
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140 parents = c->parents;
141 nth = 0;
142 while (parents) {
143 struct commit *p = parents->item;
013f276e 144 char newname[1000], *en;
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145 parents = parents->next;
146 nth++;
d3ff6f55 147 if (p->util)
8e5dd22b 148 continue;
013f276e 149 en = newname;
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150 switch (n->generation) {
151 case 0:
013f276e 152 en += sprintf(en, "%s", n->head_name);
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153 break;
154 case 1:
013f276e 155 en += sprintf(en, "%s^", n->head_name);
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156 break;
157 default:
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158 en += sprintf(en, "%s~%d",
159 n->head_name, n->generation);
160 break;
fbaf834d 161 }
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162 if (nth == 1)
163 en += sprintf(en, "^");
164 else
165 en += sprintf(en, "^%d", nth);
9befac47 166 name_commit(p, xstrdup(newname), 0);
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167 i++;
168 name_first_parent_chain(p);
169 }
170 }
171 } while (i);
172}
173
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174static int mark_seen(struct commit *commit, struct commit_list **seen_p)
175{
176 if (!commit->object.flags) {
26a8ad25 177 commit_list_insert(commit, seen_p);
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178 return 1;
179 }
180 return 0;
181}
182
183static void join_revs(struct commit_list **list_p,
184 struct commit_list **seen_p,
185 int num_rev, int extra)
186{
187 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
188 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
189
190 while (*list_p) {
191 struct commit_list *parents;
9ce70285 192 int still_interesting = !!interesting(*list_p);
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193 struct commit *commit = pop_one_commit(list_p);
194 int flags = commit->object.flags & all_mask;
f76412ed 195
9ce70285 196 if (!still_interesting && extra <= 0)
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197 break;
198
199 mark_seen(commit, seen_p);
200 if ((flags & all_revs) == all_revs)
201 flags |= UNINTERESTING;
202 parents = commit->parents;
203
204 while (parents) {
205 struct commit *p = parents->item;
206 int this_flag = p->object.flags;
207 parents = parents->next;
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208 if ((this_flag & flags) == flags)
209 continue;
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210 if (!p->object.parsed)
211 parse_commit(p);
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212 if (mark_seen(p, seen_p) && !still_interesting)
213 extra--;
214 p->object.flags |= flags;
215 insert_by_date(p, list_p);
216 }
217 }
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218
219 /*
220 * Postprocess to complete well-poisoning.
221 *
222 * At this point we have all the commits we have seen in
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223 * seen_p list. Mark anything that can be reached from
224 * uninteresting commits not interesting.
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225 */
226 for (;;) {
227 int changed = 0;
228 struct commit_list *s;
229 for (s = *seen_p; s; s = s->next) {
230 struct commit *c = s->item;
231 struct commit_list *parents;
232
233 if (((c->object.flags & all_revs) != all_revs) &&
234 !(c->object.flags & UNINTERESTING))
235 continue;
236
237 /* The current commit is either a merge base or
238 * already uninteresting one. Mark its parents
239 * as uninteresting commits _only_ if they are
240 * already parsed. No reason to find new ones
241 * here.
242 */
243 parents = c->parents;
244 while (parents) {
245 struct commit *p = parents->item;
246 parents = parents->next;
247 if (!(p->object.flags & UNINTERESTING)) {
248 p->object.flags |= UNINTERESTING;
249 changed = 1;
250 }
251 }
252 }
253 if (!changed)
254 break;
255 }
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256}
257
013f276e 258static void show_one_commit(struct commit *commit, int no_name)
f76412ed 259{
6b209d47 260 char pretty[256], *cp;
d3ff6f55 261 struct commit_name *name = commit->util;
0a2ba738 262 if (commit->object.parsed)
3815f423 263 pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
3dfb9278 264 pretty, sizeof(pretty), 0, NULL, NULL, 0);
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265 else
266 strcpy(pretty, "(unavailable)");
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267 if (!strncmp(pretty, "[PATCH] ", 8))
268 cp = pretty + 8;
269 else
270 cp = pretty;
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271
272 if (!no_name) {
273 if (name && name->head_name) {
274 printf("[%s", name->head_name);
275 if (name->generation) {
276 if (name->generation == 1)
277 printf("^");
278 else
279 printf("~%d", name->generation);
280 }
281 printf("] ");
282 }
283 else
284 printf("[%s] ",
285 find_unique_abbrev(commit->object.sha1, 7));
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286 }
287 puts(cp);
288}
289
290static char *ref_name[MAX_REVS + 1];
291static int ref_name_cnt;
292
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293static const char *find_digit_prefix(const char *s, int *v)
294{
295 const char *p;
296 int ver;
297 char ch;
298
299 for (p = s, ver = 0;
300 '0' <= (ch = *p) && ch <= '9';
301 p++)
302 ver = ver * 10 + ch - '0';
303 *v = ver;
304 return p;
305}
306
307
308static int version_cmp(const char *a, const char *b)
309{
310 while (1) {
311 int va, vb;
312
313 a = find_digit_prefix(a, &va);
314 b = find_digit_prefix(b, &vb);
315 if (va != vb)
316 return va - vb;
317
318 while (1) {
319 int ca = *a;
320 int cb = *b;
321 if ('0' <= ca && ca <= '9')
322 ca = 0;
323 if ('0' <= cb && cb <= '9')
324 cb = 0;
325 if (ca != cb)
326 return ca - cb;
327 if (!ca)
328 break;
329 a++;
330 b++;
331 }
332 if (!*a && !*b)
333 return 0;
334 }
335}
336
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337static int compare_ref_name(const void *a_, const void *b_)
338{
339 const char * const*a = a_, * const*b = b_;
bb5ebed7 340 return version_cmp(*a, *b);
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341}
342
343static void sort_ref_range(int bottom, int top)
344{
345 qsort(ref_name + bottom, top - bottom, sizeof(ref_name[0]),
346 compare_ref_name);
347}
348
8da19775 349static int append_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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350{
351 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
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352 int i;
353
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354 if (!commit)
355 return 0;
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356 /* Avoid adding the same thing twice */
357 for (i = 0; i < ref_name_cnt; i++)
358 if (!strcmp(refname, ref_name[i]))
359 return 0;
360
79778e46 361 if (MAX_REVS <= ref_name_cnt) {
f76412ed 362 fprintf(stderr, "warning: ignoring %s; "
7246ed43 363 "cannot handle more than %d refs\n",
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364 refname, MAX_REVS);
365 return 0;
366 }
9befac47 367 ref_name[ref_name_cnt++] = xstrdup(refname);
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368 ref_name[ref_name_cnt] = NULL;
369 return 0;
370}
371
8da19775 372static int append_head_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
f76412ed 373{
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374 unsigned char tmp[20];
375 int ofs = 11;
376 if (strncmp(refname, "refs/heads/", ofs))
f76412ed 377 return 0;
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378 /* If both heads/foo and tags/foo exists, get_sha1 would
379 * get confused.
380 */
a89fccd2 381 if (get_sha1(refname + ofs, tmp) || hashcmp(tmp, sha1))
92421502 382 ofs = 5;
8da19775 383 return append_ref(refname + ofs, sha1, flag, cb_data);
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384}
385
8da19775 386static int append_tag_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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387{
388 if (strncmp(refname, "refs/tags/", 10))
389 return 0;
8da19775 390 return append_ref(refname + 5, sha1, flag, cb_data);
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391}
392
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393static const char *match_ref_pattern = NULL;
394static int match_ref_slash = 0;
395static int count_slash(const char *s)
396{
397 int cnt = 0;
398 while (*s)
399 if (*s++ == '/')
400 cnt++;
401 return cnt;
402}
403
8da19775 404static int append_matching_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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405{
406 /* we want to allow pattern hold/<asterisk> to show all
407 * branches under refs/heads/hold/, and v0.99.9? to show
408 * refs/tags/v0.99.9a and friends.
409 */
410 const char *tail;
411 int slash = count_slash(refname);
412 for (tail = refname; *tail && match_ref_slash < slash; )
413 if (*tail++ == '/')
414 slash--;
415 if (!*tail)
416 return 0;
417 if (fnmatch(match_ref_pattern, tail, 0))
418 return 0;
419 if (!strncmp("refs/heads/", refname, 11))
8da19775 420 return append_head_ref(refname, sha1, flag, cb_data);
287f8600 421 if (!strncmp("refs/tags/", refname, 10))
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422 return append_tag_ref(refname, sha1, flag, cb_data);
423 return append_ref(refname, sha1, flag, cb_data);
287f8600
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424}
425
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426static void snarf_refs(int head, int tag)
427{
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428 if (head) {
429 int orig_cnt = ref_name_cnt;
cb5d709f 430 for_each_ref(append_head_ref, NULL);
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431 sort_ref_range(orig_cnt, ref_name_cnt);
432 }
433 if (tag) {
434 int orig_cnt = ref_name_cnt;
cb5d709f 435 for_each_ref(append_tag_ref, NULL);
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436 sort_ref_range(orig_cnt, ref_name_cnt);
437 }
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438}
439
ed378ec7 440static int rev_is_head(char *head, int headlen, char *name,
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441 unsigned char *head_sha1, unsigned char *sha1)
442{
ed378ec7 443 if ((!head[0]) ||
a89fccd2 444 (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
f76412ed 445 return 0;
afdcec73
JS
446 if (!strncmp(head, "refs/heads/", 11))
447 head += 11;
448 if (!strncmp(name, "refs/heads/", 11))
449 name += 11;
450 else if (!strncmp(name, "heads/", 6))
451 name += 6;
ed378ec7 452 return !strcmp(head, name);
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453}
454
455static int show_merge_base(struct commit_list *seen, int num_rev)
456{
457 int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
458 int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
2f0f8b71 459 int exit_status = 1;
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460
461 while (seen) {
462 struct commit *commit = pop_one_commit(&seen);
463 int flags = commit->object.flags & all_mask;
464 if (!(flags & UNINTERESTING) &&
465 ((flags & all_revs) == all_revs)) {
466 puts(sha1_to_hex(commit->object.sha1));
2f0f8b71
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467 exit_status = 0;
468 commit->object.flags |= UNINTERESTING;
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469 }
470 }
2f0f8b71 471 return exit_status;
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472}
473
1f8af483
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474static int show_independent(struct commit **rev,
475 int num_rev,
476 char **ref_name,
477 unsigned int *rev_mask)
478{
479 int i;
480
481 for (i = 0; i < num_rev; i++) {
482 struct commit *commit = rev[i];
483 unsigned int flag = rev_mask[i];
484
485 if (commit->object.flags == flag)
486 puts(sha1_to_hex(commit->object.sha1));
487 commit->object.flags |= UNINTERESTING;
488 }
489 return 0;
490}
491
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492static void append_one_rev(const char *av)
493{
494 unsigned char revkey[20];
495 if (!get_sha1(av, revkey)) {
8da19775 496 append_ref(av, revkey, 0, NULL);
287f8600
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497 return;
498 }
87758f97 499 if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
287f8600
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500 /* glob style match */
501 int saved_matches = ref_name_cnt;
502 match_ref_pattern = av;
503 match_ref_slash = count_slash(av);
cb5d709f 504 for_each_ref(append_matching_ref, NULL);
287f8600
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505 if (saved_matches == ref_name_cnt &&
506 ref_name_cnt < MAX_REVS)
507 error("no matching refs with %s", av);
06d900cf
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508 if (saved_matches + 1 < ref_name_cnt)
509 sort_ref_range(saved_matches, ref_name_cnt);
287f8600
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510 return;
511 }
512 die("bad sha1 reference %s", av);
513}
514
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515static int git_show_branch_config(const char *var, const char *value)
516{
517 if (!strcmp(var, "showbranch.default")) {
518 if (default_alloc <= default_num + 1) {
519 default_alloc = default_alloc * 3 / 2 + 20;
520 default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);
521 }
9befac47 522 default_arg[default_num++] = xstrdup(value);
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523 default_arg[default_num] = NULL;
524 return 0;
525 }
526
527 return git_default_config(var, value);
528}
529
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530static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
531{
532 /* If the commit is tip of the named branches, do not
533 * omit it.
534 * Otherwise, if it is a merge that is reachable from only one
535 * tip, it is not that interesting.
536 */
537 int i, flag, count;
538 for (i = 0; i < n; i++)
539 if (rev[i] == commit)
540 return 0;
541 flag = commit->object.flags;
542 for (i = count = 0; i < n; i++) {
543 if (flag & (1u << (i + REV_SHIFT)))
544 count++;
545 }
546 if (count == 1)
547 return 1;
548 return 0;
549}
550
a633fca0 551int cmd_show_branch(int ac, const char **av, const char *prefix)
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552{
553 struct commit *rev[MAX_REVS], *commit;
554 struct commit_list *list = NULL, *seen = NULL;
1f8af483 555 unsigned int rev_mask[MAX_REVS];
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556 int num_rev, i, extra = 0;
557 int all_heads = 0, all_tags = 0;
6b209d47 558 int all_mask, all_revs;
4c8725f1 559 int lifo = 1;
ed378ec7
LT
560 char head[128];
561 const char *head_p;
562 int head_len;
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563 unsigned char head_sha1[20];
564 int merge_base = 0;
1f8af483 565 int independent = 0;
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566 int no_name = 0;
567 int sha1_name = 0;
6b209d47 568 int shown_merge_point = 0;
1aa68d67 569 int with_current_branch = 0;
ebedc319 570 int head_at = -1;
d320a543 571 int topics = 0;
c24fe420 572 int dense = 1;
7e3fe904 573 int reflog = 0;
f76412ed 574
ce1610ea 575 git_config(git_show_branch_config);
076b2324 576
c2bdd6af
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577 /* If nothing is specified, try the default first */
578 if (ac == 1 && default_num) {
579 ac = default_num + 1;
580 av = default_arg - 1; /* ick; we would not address av[0] */
581 }
582
f76412ed 583 while (1 < ac && av[1][0] == '-') {
51ce34b9 584 const char *arg = av[1];
c2bdd6af
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585 if (!strcmp(arg, "--")) {
586 ac--; av++;
587 break;
588 }
589 else if (!strcmp(arg, "--all"))
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590 all_heads = all_tags = 1;
591 else if (!strcmp(arg, "--heads"))
592 all_heads = 1;
593 else if (!strcmp(arg, "--tags"))
594 all_tags = 1;
595 else if (!strcmp(arg, "--more"))
596 extra = 1;
1f8af483
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597 else if (!strcmp(arg, "--list"))
598 extra = -1;
013f276e
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599 else if (!strcmp(arg, "--no-name"))
600 no_name = 1;
1aa68d67
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601 else if (!strcmp(arg, "--current"))
602 with_current_branch = 1;
013f276e
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603 else if (!strcmp(arg, "--sha1-name"))
604 sha1_name = 1;
1f8af483 605 else if (!strncmp(arg, "--more=", 7))
f76412ed 606 extra = atoi(arg + 7);
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607 else if (!strcmp(arg, "--merge-base"))
608 merge_base = 1;
1f8af483
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609 else if (!strcmp(arg, "--independent"))
610 independent = 1;
6b209d47 611 else if (!strcmp(arg, "--topo-order"))
4c8725f1 612 lifo = 1;
d320a543
JH
613 else if (!strcmp(arg, "--topics"))
614 topics = 1;
c24fe420
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615 else if (!strcmp(arg, "--sparse"))
616 dense = 0;
4c8725f1
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617 else if (!strcmp(arg, "--date-order"))
618 lifo = 0;
7e3fe904
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619 else if (!strcmp(arg, "--reflog")) {
620 reflog = DEFAULT_REFLOG;
621 }
622 else if (!strncmp(arg, "--reflog=", 9)) {
623 char *end;
624 reflog = strtoul(arg + 9, &end, 10);
625 if (*end != '\0')
626 die("unrecognized reflog count '%s'", arg + 9);
627 }
f76412ed
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628 else
629 usage(show_branch_usage);
630 ac--; av++;
631 }
632 ac--; av++;
633
1f8af483 634 /* Only one of these is allowed */
7e3fe904 635 if (1 < independent + merge_base + (extra != 0) + (!!reflog))
1f8af483
JH
636 usage(show_branch_usage);
637
bb5ebed7
JH
638 /* If nothing is specified, show all branches by default */
639 if (ac + all_heads + all_tags == 0)
640 all_heads = 1;
641
f76412ed
JH
642 if (all_heads + all_tags)
643 snarf_refs(all_heads, all_tags);
7e3fe904
JH
644 if (reflog) {
645 int reflen;
646 if (!ac)
647 die("--reflog option needs one branch name");
648 reflen = strlen(*av);
649 for (i = 0; i < reflog; i++) {
650 char *name = xmalloc(reflen + 20);
651 sprintf(name, "%s@{%d}", *av, i);
652 append_one_rev(name);
653 }
654 }
655 else {
656 while (0 < ac) {
657 append_one_rev(*av);
658 ac--; av++;
659 }
287f8600 660 }
bb5ebed7 661
8da19775 662 head_p = resolve_ref("HEAD", head_sha1, 1, NULL);
ed378ec7
LT
663 if (head_p) {
664 head_len = strlen(head_p);
665 memcpy(head, head_p, head_len + 1);
1aa68d67
JH
666 }
667 else {
ed378ec7
LT
668 head_len = 0;
669 head[0] = 0;
1aa68d67
JH
670 }
671
ed378ec7 672 if (with_current_branch && head_p) {
1aa68d67
JH
673 int has_head = 0;
674 for (i = 0; !has_head && i < ref_name_cnt; i++) {
675 /* We are only interested in adding the branch
676 * HEAD points at.
677 */
ed378ec7
LT
678 if (rev_is_head(head,
679 head_len,
1aa68d67
JH
680 ref_name[i],
681 head_sha1, NULL))
682 has_head++;
683 }
684 if (!has_head) {
ed378ec7
LT
685 int pfxlen = strlen("refs/heads/");
686 append_one_rev(head + pfxlen);
1aa68d67
JH
687 }
688 }
689
287f8600
JH
690 if (!ref_name_cnt) {
691 fprintf(stderr, "No revs to be shown.\n");
692 exit(0);
693 }
f76412ed
JH
694
695 for (num_rev = 0; ref_name[num_rev]; num_rev++) {
696 unsigned char revkey[20];
1f8af483 697 unsigned int flag = 1u << (num_rev + REV_SHIFT);
f76412ed
JH
698
699 if (MAX_REVS <= num_rev)
700 die("cannot handle more than %d revs.", MAX_REVS);
701 if (get_sha1(ref_name[num_rev], revkey))
7246ed43 702 die("'%s' is not a valid ref.", ref_name[num_rev]);
f76412ed
JH
703 commit = lookup_commit_reference(revkey);
704 if (!commit)
705 die("cannot find commit %s (%s)",
706 ref_name[num_rev], revkey);
707 parse_commit(commit);
f76412ed
JH
708 mark_seen(commit, &seen);
709
710 /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
711 * and so on. REV_SHIFT bits from bit 0 are used for
712 * internal bookkeeping.
713 */
1f8af483
JH
714 commit->object.flags |= flag;
715 if (commit->object.flags == flag)
716 insert_by_date(commit, &list);
f76412ed
JH
717 rev[num_rev] = commit;
718 }
1f8af483
JH
719 for (i = 0; i < num_rev; i++)
720 rev_mask[i] = rev[i]->object.flags;
721
722 if (0 <= extra)
723 join_revs(&list, &seen, num_rev, extra);
f76412ed 724
26a8ad25
JH
725 sort_by_date(&seen);
726
f76412ed
JH
727 if (merge_base)
728 return show_merge_base(seen, num_rev);
729
1f8af483
JH
730 if (independent)
731 return show_independent(rev, num_rev, ref_name, rev_mask);
732
733 /* Show list; --more=-1 means list-only */
c9d023b2 734 if (1 < num_rev || extra < 0) {
f76412ed
JH
735 for (i = 0; i < num_rev; i++) {
736 int j;
ed378ec7
LT
737 int is_head = rev_is_head(head,
738 head_len,
f76412ed
JH
739 ref_name[i],
740 head_sha1,
741 rev[i]->object.sha1);
1f8af483
JH
742 if (extra < 0)
743 printf("%c [%s] ",
744 is_head ? '*' : ' ', ref_name[i]);
745 else {
746 for (j = 0; j < i; j++)
747 putchar(' ');
748 printf("%c [%s] ",
749 is_head ? '*' : '!', ref_name[i]);
750 }
013f276e
JH
751 /* header lines never need name */
752 show_one_commit(rev[i], 1);
ebedc319
JH
753 if (is_head)
754 head_at = i;
f76412ed 755 }
1f8af483
JH
756 if (0 <= extra) {
757 for (i = 0; i < num_rev; i++)
758 putchar('-');
759 putchar('\n');
760 }
f5e375c9 761 }
1f8af483
JH
762 if (extra < 0)
763 exit(0);
f5e375c9 764
8e5dd22b 765 /* Sort topologically */
4c8725f1 766 sort_in_topological_order(&seen, lifo);
8e5dd22b
JH
767
768 /* Give names to commits */
013f276e
JH
769 if (!sha1_name && !no_name)
770 name_commits(seen, rev, ref_name, num_rev);
8e5dd22b
JH
771
772 all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
773 all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
8e5dd22b 774
f76412ed
JH
775 while (seen) {
776 struct commit *commit = pop_one_commit(&seen);
777 int this_flag = commit->object.flags;
f794c234 778 int is_merge_point = ((this_flag & all_revs) == all_revs);
f5e375c9 779
f794c234 780 shown_merge_point |= is_merge_point;
8e5dd22b 781
f5e375c9 782 if (1 < num_rev) {
c24fe420
JH
783 int is_merge = !!(commit->parents &&
784 commit->parents->next);
f794c234
JH
785 if (topics &&
786 !is_merge_point &&
787 (this_flag & (1u << REV_SHIFT)))
788 continue;
c24fe420
JH
789 if (dense && is_merge &&
790 omit_in_dense(commit, rev, num_rev))
791 continue;
ebedc319
JH
792 for (i = 0; i < num_rev; i++) {
793 int mark;
794 if (!(this_flag & (1u << (i + REV_SHIFT))))
795 mark = ' ';
796 else if (is_merge)
797 mark = '-';
798 else if (i == head_at)
799 mark = '*';
800 else
801 mark = '+';
802 putchar(mark);
803 }
f5e375c9
JH
804 putchar(' ');
805 }
013f276e 806 show_one_commit(commit, no_name);
6b209d47
JH
807
808 if (shown_merge_point && --extra < 0)
809 break;
f76412ed
JH
810 }
811 return 0;
812}