fmt-merge-msg.c

   1 #include "config.h"
   2 #include "refs.h"
   3 #include "object-store.h"
   4 #include "diff.h"
   5 #include "diff-merges.h"
   6 #include "revision.h"
   7 #include "tag.h"
   8 #include "string-list.h"
   9 #include "branch.h"
  10 #include "fmt-merge-msg.h"
  11 #include "commit-reach.h"
  12 #include "gpg-interface.h"
  13
  14 static int use_branch_desc;
  15 static int suppress_dest_pattern_seen;
  16 static struct string_list suppress_dest_patterns = STRING_LIST_INIT_DUP;
  17
  18 int fmt_merge_msg_config(const char *key, const char *value, void *cb)
  19 {
  20         int status = 0;
  21
  22         if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) {
  23                 int is_bool;
  24                 merge_log_config = git_config_bool_or_int(key, value, &is_bool);
  25                 if (!is_bool && merge_log_config < 0)
  26                         return error("%s: negative length %s", key, value);
  27                 if (is_bool && merge_log_config)
  28                         merge_log_config = DEFAULT_MERGE_LOG_LEN;
  29         } else if (!strcmp(key, "merge.branchdesc")) {
  30                 use_branch_desc = git_config_bool(key, value);
  31         } else if (!strcmp(key, "merge.suppressdest")) {
  32                 if (!value)
  33                         return config_error_nonbool(key);
  34                 if (!*value)
  35                         string_list_clear(&suppress_dest_patterns, 0);
  36                 else
  37                         string_list_append(&suppress_dest_patterns, value);
  38                 suppress_dest_pattern_seen = 1;
  39         } else {
  40                 status = git_gpg_config(key, value, NULL);
  41                 if (status)
  42                         return status;
  43                 return git_default_config(key, value, cb);
  44         }
  45         return 0;
  46 }
  47
  48 /* merge data per repository where the merged tips came from */
  49 struct src_data {
  50         struct string_list branch, tag, r_branch, generic;
  51         int head_status;
  52 };
  53
  54 struct origin_data {
  55         struct object_id oid;
  56         unsigned is_local_branch:1;
  57 };
  58
  59 static void init_src_data(struct src_data *data)
  60 {
  61         data->branch.strdup_strings = 1;
  62         data->tag.strdup_strings = 1;
  63         data->r_branch.strdup_strings = 1;
  64         data->generic.strdup_strings = 1;
  65 }
  66
  67 static struct string_list srcs = STRING_LIST_INIT_DUP;
  68 static struct string_list origins = STRING_LIST_INIT_DUP;
  69
  70 struct merge_parents {
  71         int alloc, nr;
  72         struct merge_parent {
  73                 struct object_id given;
  74                 struct object_id commit;
  75                 unsigned char used;
  76         } *item;
  77 };
  78
  79 /*
  80  * I know, I know, this is inefficient, but you won't be pulling and merging
  81  * hundreds of heads at a time anyway.
  82  */
  83 static struct merge_parent *find_merge_parent(struct merge_parents *table,
  84                                               struct object_id *given,
  85                                               struct object_id *commit)
  86 {
  87         int i;
  88         for (i = 0; i < table->nr; i++) {
  89                 if (given && !oideq(&table->item[i].given, given))
  90                         continue;
  91                 if (commit && !oideq(&table->item[i].commit, commit))
  92                         continue;
  93                 return &table->item[i];
  94         }
  95         return NULL;
  96 }
  97
  98 static void add_merge_parent(struct merge_parents *table,
  99                              struct object_id *given,
 100                              struct object_id *commit)
 101 {
 102         if (table->nr && find_merge_parent(table, given, commit))
 103                 return;
 104         ALLOC_GROW(table->item, table->nr + 1, table->alloc);
 105         oidcpy(&table->item[table->nr].given, given);
 106         oidcpy(&table->item[table->nr].commit, commit);
 107         table->item[table->nr].used = 0;
 108         table->nr++;
 109 }
 110
 111 static int handle_line(char *line, struct merge_parents *merge_parents)
 112 {
 113         int i, len = strlen(line);
 114         struct origin_data *origin_data;
 115         char *src;
 116         const char *origin, *tag_name;
 117         char *to_free = NULL;
 118         struct src_data *src_data;
 119         struct string_list_item *item;
 120         int pulling_head = 0;
 121         struct object_id oid;
 122         const unsigned hexsz = the_hash_algo->hexsz;
 123
 124         if (len < hexsz + 3 || line[hexsz] != '\t')
 125                 return 1;
 126
 127         if (starts_with(line + hexsz + 1, "not-for-merge"))
 128                 return 0;
 129
 130         if (line[hexsz + 1] != '\t')
 131                 return 2;
 132
 133         i = get_oid_hex(line, &oid);
 134         if (i)
 135                 return 3;
 136
 137         if (!find_merge_parent(merge_parents, &oid, NULL))
 138                 return 0; /* subsumed by other parents */
 139
 140         CALLOC_ARRAY(origin_data, 1);
 141         oidcpy(&origin_data->oid, &oid);
 142
 143         if (line[len - 1] == '\n')
 144                 line[len - 1] = 0;
 145         line += hexsz + 2;
 146
 147         /*
 148          * At this point, line points at the beginning of comment e.g.
 149          * "branch 'frotz' of git://that/repository.git".
 150          * Find the repository name and point it with src.
 151          */
 152         src = strstr(line, " of ");
 153         if (src) {
 154                 *src = 0;
 155                 src += 4;
 156                 pulling_head = 0;
 157         } else {
 158                 src = line;
 159                 pulling_head = 1;
 160         }
 161
 162         item = unsorted_string_list_lookup(&srcs, src);
 163         if (!item) {
 164                 item = string_list_append(&srcs, src);
 165                 item->util = xcalloc(1, sizeof(struct src_data));
 166                 init_src_data(item->util);
 167         }
 168         src_data = item->util;
 169
 170         if (pulling_head) {
 171                 origin = src;
 172                 src_data->head_status |= 1;
 173         } else if (skip_prefix(line, "branch ", &origin)) {
 174                 origin_data->is_local_branch = 1;
 175                 string_list_append(&src_data->branch, origin);
 176                 src_data->head_status |= 2;
 177         } else if (skip_prefix(line, "tag ", &tag_name)) {
 178                 origin = line;
 179                 string_list_append(&src_data->tag, tag_name);
 180                 src_data->head_status |= 2;
 181         } else if (skip_prefix(line, "remote-tracking branch ", &origin)) {
 182                 string_list_append(&src_data->r_branch, origin);
 183                 src_data->head_status |= 2;
 184         } else {
 185                 origin = src;
 186                 string_list_append(&src_data->generic, line);
 187                 src_data->head_status |= 2;
 188         }
 189
 190         if (!strcmp(".", src) || !strcmp(src, origin)) {
 191                 int len = strlen(origin);
 192                 if (origin[0] == '\'' && origin[len - 1] == '\'')
 193                         origin = to_free = xmemdupz(origin + 1, len - 2);
 194         } else
 195                 origin = to_free = xstrfmt("%s of %s", origin, src);
 196         if (strcmp(".", src))
 197                 origin_data->is_local_branch = 0;
 198         string_list_append(&origins, origin)->util = origin_data;
 199         free(to_free);
 200         return 0;
 201 }
 202
 203 static void print_joined(const char *singular, const char *plural,
 204                 struct string_list *list, struct strbuf *out)
 205 {
 206         if (list->nr == 0)
 207                 return;
 208         if (list->nr == 1) {
 209                 strbuf_addf(out, "%s%s", singular, list->items[0].string);
 210         } else {
 211                 int i;
 212                 strbuf_addstr(out, plural);
 213                 for (i = 0; i < list->nr - 1; i++)
 214                         strbuf_addf(out, "%s%s", i > 0 ? ", " : "",
 215                                     list->items[i].string);
 216                 strbuf_addf(out, " and %s", list->items[list->nr - 1].string);
 217         }
 218 }
 219
 220 static void add_branch_desc(struct strbuf *out, const char *name)
 221 {
 222         struct strbuf desc = STRBUF_INIT;
 223
 224         if (!read_branch_desc(&desc, name)) {
 225                 const char *bp = desc.buf;
 226                 while (*bp) {
 227                         const char *ep = strchrnul(bp, '\n');
 228                         if (*ep)
 229                                 ep++;
 230                         strbuf_addf(out, "  : %.*s", (int)(ep - bp), bp);
 231                         bp = ep;
 232                 }
 233                 strbuf_complete_line(out);
 234         }
 235         strbuf_release(&desc);
 236 }
 237
 238 #define util_as_integral(elem) ((intptr_t)((elem)->util))
 239
 240 static void record_person_from_buf(int which, struct string_list *people,
 241                                    const char *buffer)
 242 {
 243         char *name_buf, *name, *name_end;
 244         struct string_list_item *elem;
 245         const char *field;
 246
 247         field = (which == 'a') ? "\nauthor " : "\ncommitter ";
 248         name = strstr(buffer, field);
 249         if (!name)
 250                 return;
 251         name += strlen(field);
 252         name_end = strchrnul(name, '<');
 253         if (*name_end)
 254                 name_end--;
 255         while (isspace(*name_end) && name <= name_end)
 256                 name_end--;
 257         if (name_end < name)
 258                 return;
 259         name_buf = xmemdupz(name, name_end - name + 1);
 260
 261         elem = string_list_lookup(people, name_buf);
 262         if (!elem) {
 263                 elem = string_list_insert(people, name_buf);
 264                 elem->util = (void *)0;
 265         }
 266         elem->util = (void*)(util_as_integral(elem) + 1);
 267         free(name_buf);
 268 }
 269
 270
 271 static void record_person(int which, struct string_list *people,
 272                           struct commit *commit)
 273 {
 274         const char *buffer = get_commit_buffer(commit, NULL);
 275         record_person_from_buf(which, people, buffer);
 276         unuse_commit_buffer(commit, buffer);
 277 }
 278
 279 static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
 280 {
 281         const struct string_list_item *a = a_, *b = b_;
 282         return util_as_integral(b) - util_as_integral(a);
 283 }
 284
 285 static void add_people_count(struct strbuf *out, struct string_list *people)
 286 {
 287         if (people->nr == 1)
 288                 strbuf_addstr(out, people->items[0].string);
 289         else if (people->nr == 2)
 290                 strbuf_addf(out, "%s (%d) and %s (%d)",
 291                             people->items[0].string,
 292                             (int)util_as_integral(&people->items[0]),
 293                             people->items[1].string,
 294                             (int)util_as_integral(&people->items[1]));
 295         else if (people->nr)
 296                 strbuf_addf(out, "%s (%d) and others",
 297                             people->items[0].string,
 298                             (int)util_as_integral(&people->items[0]));
 299 }
 300
 301 static void credit_people(struct strbuf *out,
 302                           struct string_list *them,
 303                           int kind)
 304 {
 305         const char *label;
 306         const char *me;
 307
 308         if (kind == 'a') {
 309                 label = "By";
 310                 me = git_author_info(IDENT_NO_DATE);
 311         } else {
 312                 label = "Via";
 313                 me = git_committer_info(IDENT_NO_DATE);
 314         }
 315
 316         if (!them->nr ||
 317             (them->nr == 1 &&
 318              me &&
 319              skip_prefix(me, them->items->string, &me) &&
 320              starts_with(me, " <")))
 321                 return;
 322         strbuf_addf(out, "\n%c %s ", comment_line_char, label);
 323         add_people_count(out, them);
 324 }
 325
 326 static void add_people_info(struct strbuf *out,
 327                             struct string_list *authors,
 328                             struct string_list *committers)
 329 {
 330         QSORT(authors->items, authors->nr,
 331               cmp_string_list_util_as_integral);
 332         QSORT(committers->items, committers->nr,
 333               cmp_string_list_util_as_integral);
 334
 335         credit_people(out, authors, 'a');
 336         credit_people(out, committers, 'c');
 337 }
 338
 339 static void shortlog(const char *name,
 340                      struct origin_data *origin_data,
 341                      struct commit *head,
 342                      struct rev_info *rev,
 343                      struct fmt_merge_msg_opts *opts,
 344                      struct strbuf *out)
 345 {
 346         int i, count = 0;
 347         struct commit *commit;
 348         struct object *branch;
 349         struct string_list subjects = STRING_LIST_INIT_DUP;
 350         struct string_list authors = STRING_LIST_INIT_DUP;
 351         struct string_list committers = STRING_LIST_INIT_DUP;
 352         int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
 353         struct strbuf sb = STRBUF_INIT;
 354         const struct object_id *oid = &origin_data->oid;
 355         int limit = opts->shortlog_len;
 356
 357         branch = deref_tag(the_repository, parse_object(the_repository, oid),
 358                            oid_to_hex(oid),
 359                            the_hash_algo->hexsz);
 360         if (!branch || branch->type != OBJ_COMMIT)
 361                 return;
 362
 363         setup_revisions(0, NULL, rev, NULL);
 364         add_pending_object(rev, branch, name);
 365         add_pending_object(rev, &head->object, "^HEAD");
 366         head->object.flags |= UNINTERESTING;
 367         if (prepare_revision_walk(rev))
 368                 die("revision walk setup failed");
 369         while ((commit = get_revision(rev)) != NULL) {
 370                 struct pretty_print_context ctx = {0};
 371
 372                 if (commit->parents && commit->parents->next) {
 373                         /* do not list a merge but count committer */
 374                         if (opts->credit_people)
 375                                 record_person('c', &committers, commit);
 376                         continue;
 377                 }
 378                 if (!count && opts->credit_people)
 379                         /* the 'tip' committer */
 380                         record_person('c', &committers, commit);
 381                 if (opts->credit_people)
 382                         record_person('a', &authors, commit);
 383                 count++;
 384                 if (subjects.nr > limit)
 385                         continue;
 386
 387                 format_commit_message(commit, "%s", &sb, &ctx);
 388                 strbuf_ltrim(&sb);
 389
 390                 if (!sb.len)
 391                         string_list_append(&subjects,
 392                                            oid_to_hex(&commit->object.oid));
 393                 else
 394                         string_list_append_nodup(&subjects,
 395                                                  strbuf_detach(&sb, NULL));
 396         }
 397
 398         if (opts->credit_people)
 399                 add_people_info(out, &authors, &committers);
 400         if (count > limit)
 401                 strbuf_addf(out, "\n* %s: (%d commits)\n", name, count);
 402         else
 403                 strbuf_addf(out, "\n* %s:\n", name);
 404
 405         if (origin_data->is_local_branch && use_branch_desc)
 406                 add_branch_desc(out, name);
 407
 408         for (i = 0; i < subjects.nr; i++)
 409                 if (i >= limit)
 410                         strbuf_addstr(out, "  ...\n");
 411                 else
 412                         strbuf_addf(out, "  %s\n", subjects.items[i].string);
 413
 414         clear_commit_marks((struct commit *)branch, flags);
 415         clear_commit_marks(head, flags);
 416         free_commit_list(rev->commits);
 417         rev->commits = NULL;
 418         rev->pending.nr = 0;
 419
 420         string_list_clear(&authors, 0);
 421         string_list_clear(&committers, 0);
 422         string_list_clear(&subjects, 0);
 423 }
 424
 425 /*
 426  * See if dest_branch matches with any glob pattern on the
 427  * suppress_dest_patterns list.
 428  *
 429  * We may want to also allow negative matches e.g. ":!glob" like we do
 430  * for pathspec, but for now, let's keep it simple and stupid.
 431  */
 432 static int dest_suppressed(const char *dest_branch)
 433 {
 434         struct string_list_item *item;
 435
 436         for_each_string_list_item(item, &suppress_dest_patterns) {
 437                 if (!wildmatch(item->string, dest_branch, WM_PATHNAME))
 438                         return 1;
 439         }
 440         return 0;
 441 }
 442
 443 static void fmt_merge_msg_title(struct strbuf *out,
 444                                 const char *current_branch)
 445 {
 446         int i = 0;
 447         char *sep = "";
 448
 449         strbuf_addstr(out, "Merge ");
 450         for (i = 0; i < srcs.nr; i++) {
 451                 struct src_data *src_data = srcs.items[i].util;
 452                 const char *subsep = "";
 453
 454                 strbuf_addstr(out, sep);
 455                 sep = "; ";
 456
 457                 if (src_data->head_status == 1) {
 458                         strbuf_addstr(out, srcs.items[i].string);
 459                         continue;
 460                 }
 461                 if (src_data->head_status == 3) {
 462                         subsep = ", ";
 463                         strbuf_addstr(out, "HEAD");
 464                 }
 465                 if (src_data->branch.nr) {
 466                         strbuf_addstr(out, subsep);
 467                         subsep = ", ";
 468                         print_joined("branch ", "branches ", &src_data->branch,
 469                                         out);
 470                 }
 471                 if (src_data->r_branch.nr) {
 472                         strbuf_addstr(out, subsep);
 473                         subsep = ", ";
 474                         print_joined("remote-tracking branch ", "remote-tracking branches ",
 475                                         &src_data->r_branch, out);
 476                 }
 477                 if (src_data->tag.nr) {
 478                         strbuf_addstr(out, subsep);
 479                         subsep = ", ";
 480                         print_joined("tag ", "tags ", &src_data->tag, out);
 481                 }
 482                 if (src_data->generic.nr) {
 483                         strbuf_addstr(out, subsep);
 484                         print_joined("commit ", "commits ", &src_data->generic,
 485                                         out);
 486                 }
 487                 if (strcmp(".", srcs.items[i].string))
 488                         strbuf_addf(out, " of %s", srcs.items[i].string);
 489         }
 490
 491         if (!dest_suppressed(current_branch))
 492                 strbuf_addf(out, " into %s", current_branch);
 493         strbuf_addch(out, '\n');
 494 }
 495
 496 static void fmt_tag_signature(struct strbuf *tagbuf,
 497                               struct strbuf *sig,
 498                               const char *buf,
 499                               unsigned long len)
 500 {
 501         const char *tag_body = strstr(buf, "\n\n");
 502         if (tag_body) {
 503                 tag_body += 2;
 504                 strbuf_add(tagbuf, tag_body, buf + len - tag_body);
 505         }
 506         strbuf_complete_line(tagbuf);
 507         if (sig->len) {
 508                 strbuf_addch(tagbuf, '\n');
 509                 strbuf_add_commented_lines(tagbuf, sig->buf, sig->len);
 510         }
 511 }
 512
 513 static void fmt_merge_msg_sigs(struct strbuf *out)
 514 {
 515         int i, tag_number = 0, first_tag = 0;
 516         struct strbuf tagbuf = STRBUF_INIT;
 517
 518         for (i = 0; i < origins.nr; i++) {
 519                 struct object_id *oid = origins.items[i].util;
 520                 enum object_type type;
 521                 unsigned long size;
 522                 char *buf = read_object_file(oid, &type, &size);
 523                 char *origbuf = buf;
 524                 unsigned long len = size;
 525                 struct signature_check sigc = { NULL };
 526                 struct strbuf payload = STRBUF_INIT, sig = STRBUF_INIT;
 527
 528                 if (!buf || type != OBJ_TAG)
 529                         goto next;
 530
 531                 if (!parse_signature(buf, size, &payload, &sig))
 532                         ;/* merely annotated */
 533                 else {
 534                         buf = payload.buf;
 535                         len = payload.len;
 536                         sigc.payload_type = SIGNATURE_PAYLOAD_TAG;
 537                         sigc.payload = strbuf_detach(&payload, &sigc.payload_len);
 538                         if (check_signature(&sigc, sig.buf, sig.len) &&
 539                             !sigc.output)
 540                                 strbuf_addstr(&sig, "gpg verification failed.\n");
 541                         else
 542                                 strbuf_addstr(&sig, sigc.output);
 543                 }
 544
 545                 if (!tag_number++) {
 546                         fmt_tag_signature(&tagbuf, &sig, buf, len);
 547                         first_tag = i;
 548                 } else {
 549                         if (tag_number == 2) {
 550                                 struct strbuf tagline = STRBUF_INIT;
 551                                 strbuf_addch(&tagline, '\n');
 552                                 strbuf_add_commented_lines(&tagline,
 553                                                 origins.items[first_tag].string,
 554                                                 strlen(origins.items[first_tag].string));
 555                                 strbuf_insert(&tagbuf, 0, tagline.buf,
 556                                               tagline.len);
 557                                 strbuf_release(&tagline);
 558                         }
 559                         strbuf_addch(&tagbuf, '\n');
 560                         strbuf_add_commented_lines(&tagbuf,
 561                                         origins.items[i].string,
 562                                         strlen(origins.items[i].string));
 563                         fmt_tag_signature(&tagbuf, &sig, buf, len);
 564                 }
 565                 strbuf_release(&payload);
 566                 strbuf_release(&sig);
 567                 signature_check_clear(&sigc);
 568         next:
 569                 free(origbuf);
 570         }
 571         if (tagbuf.len) {
 572                 strbuf_addch(out, '\n');
 573                 strbuf_addbuf(out, &tagbuf);
 574         }
 575         strbuf_release(&tagbuf);
 576 }
 577
 578 static void find_merge_parents(struct merge_parents *result,
 579                                struct strbuf *in, struct object_id *head)
 580 {
 581         struct commit_list *parents;
 582         struct commit *head_commit;
 583         int pos = 0, i, j;
 584
 585         parents = NULL;
 586         while (pos < in->len) {
 587                 int len;
 588                 char *p = in->buf + pos;
 589                 char *newline = strchr(p, '\n');
 590                 const char *q;
 591                 struct object_id oid;
 592                 struct commit *parent;
 593                 struct object *obj;
 594
 595                 len = newline ? newline - p : strlen(p);
 596                 pos += len + !!newline;
 597
 598                 if (parse_oid_hex(p, &oid, &q) ||
 599                     q[0] != '\t' ||
 600                     q[1] != '\t')
 601                         continue; /* skip not-for-merge */
 602                 /*
 603                  * Do not use get_merge_parent() here; we do not have
 604                  * "name" here and we do not want to contaminate its
 605                  * util field yet.
 606                  */
 607                 obj = parse_object(the_repository, &oid);
 608                 parent = (struct commit *)peel_to_type(NULL, 0, obj, OBJ_COMMIT);
 609                 if (!parent)
 610                         continue;
 611                 commit_list_insert(parent, &parents);
 612                 add_merge_parent(result, &obj->oid, &parent->object.oid);
 613         }
 614         head_commit = lookup_commit(the_repository, head);
 615         if (head_commit)
 616                 commit_list_insert(head_commit, &parents);
 617         reduce_heads_replace(&parents);
 618
 619         while (parents) {
 620                 struct commit *cmit = pop_commit(&parents);
 621                 for (i = 0; i < result->nr; i++)
 622                         if (oideq(&result->item[i].commit, &cmit->object.oid))
 623                                 result->item[i].used = 1;
 624         }
 625
 626         for (i = j = 0; i < result->nr; i++) {
 627                 if (result->item[i].used) {
 628                         if (i != j)
 629                                 result->item[j] = result->item[i];
 630                         j++;
 631                 }
 632         }
 633         result->nr = j;
 634 }
 635
 636
 637 int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
 638                   struct fmt_merge_msg_opts *opts)
 639 {
 640         int i = 0, pos = 0;
 641         struct object_id head_oid;
 642         const char *current_branch;
 643         void *current_branch_to_free;
 644         struct merge_parents merge_parents;
 645
 646         if (!suppress_dest_pattern_seen) {
 647                 string_list_append(&suppress_dest_patterns, "main");
 648                 string_list_append(&suppress_dest_patterns, "master");
 649         }
 650
 651         memset(&merge_parents, 0, sizeof(merge_parents));
 652
 653         /* learn the commit that we merge into and the current branch name */
 654         current_branch = current_branch_to_free =
 655                 resolve_refdup("HEAD", RESOLVE_REF_READING, &head_oid, NULL);
 656         if (!current_branch)
 657                 die("No current branch");
 658
 659         if (opts->into_name)
 660                 current_branch = opts->into_name;
 661         else if (starts_with(current_branch, "refs/heads/"))
 662                 current_branch += 11;
 663
 664         find_merge_parents(&merge_parents, in, &head_oid);
 665
 666         /* get a line */
 667         while (pos < in->len) {
 668                 int len;
 669                 char *newline, *p = in->buf + pos;
 670
 671                 newline = strchr(p, '\n');
 672                 len = newline ? newline - p : strlen(p);
 673                 pos += len + !!newline;
 674                 i++;
 675                 p[len] = 0;
 676                 if (handle_line(p, &merge_parents))
 677                         die("error in line %d: %.*s", i, len, p);
 678         }
 679
 680         if (opts->add_title && srcs.nr)
 681                 fmt_merge_msg_title(out, current_branch);
 682
 683         if (origins.nr)
 684                 fmt_merge_msg_sigs(out);
 685
 686         if (opts->shortlog_len) {
 687                 struct commit *head;
 688                 struct rev_info rev;
 689
 690                 head = lookup_commit_or_die(&head_oid, "HEAD");
 691                 repo_init_revisions(the_repository, &rev, NULL);
 692                 rev.commit_format = CMIT_FMT_ONELINE;
 693                 diff_merges_suppress(&rev);
 694                 rev.limited = 1;
 695
 696                 strbuf_complete_line(out);
 697
 698                 for (i = 0; i < origins.nr; i++)
 699                         shortlog(origins.items[i].string,
 700                                  origins.items[i].util,
 701                                  head, &rev, opts, out);
 702                 release_revisions(&rev);
 703         }
 704
 705         strbuf_complete_line(out);
 706         free(current_branch_to_free);
 707         free(merge_parents.item);
 708         return 0;
 709 }