fmt-merge-msg.c

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