git.oblomov.eu Git - git/blob - builtin-log.c

   1 /*
   2  * Builtin "git log" and related commands (show, whatchanged)
   3  *
   4  * (C) Copyright 2006 Linus Torvalds
   5  *               2006 Junio Hamano
   6  */
   7 #include "cache.h"
   8 #include "color.h"
   9 #include "commit.h"
  10 #include "diff.h"
  11 #include "revision.h"
  12 #include "log-tree.h"
  13 #include "builtin.h"
  14 #include "tag.h"
  15 #include "reflog-walk.h"
  16 #include "patch-ids.h"
  17 #include "run-command.h"
  18 #include "shortlog.h"
  19 #include "remote.h"
  20 #include "string-list.h"
  21 #include "parse-options.h"
  22
  23 /* Set a default date-time format for git log ("log.date" config variable) */
  24 static const char *default_date_mode = NULL;
  25
  26 static int default_show_root = 1;
  27 static const char *fmt_patch_subject_prefix = "PATCH";
  28 static const char *fmt_pretty;
  29
  30 static const char * const builtin_log_usage =
  31         "git log [<options>] [<since>..<until>] [[--] <path>...]\n"
  32         "   or: git show [options] <object>...";
  33
  34 static void cmd_log_init(int argc, const char **argv, const char *prefix,
  35                       struct rev_info *rev)
  36 {
  37         int i;
  38         int decoration_style = 0;
  39
  40         rev->abbrev = DEFAULT_ABBREV;
  41         rev->commit_format = CMIT_FMT_DEFAULT;
  42         if (fmt_pretty)
  43                 get_commit_format(fmt_pretty, rev);
  44         rev->verbose_header = 1;
  45         DIFF_OPT_SET(&rev->diffopt, RECURSIVE);
  46         rev->show_root_diff = default_show_root;
  47         rev->subject_prefix = fmt_patch_subject_prefix;
  48         DIFF_OPT_SET(&rev->diffopt, ALLOW_TEXTCONV);
  49
  50         if (default_date_mode)
  51                 rev->date_mode = parse_date_format(default_date_mode);
  52
  53         /*
  54          * Check for -h before setup_revisions(), or "git log -h" will
  55          * fail when run without a git directory.
  56          */
  57         if (argc == 2 && !strcmp(argv[1], "-h"))
  58                 usage(builtin_log_usage);
  59         argc = setup_revisions(argc, argv, rev, "HEAD");
  60
  61         if (rev->diffopt.pickaxe || rev->diffopt.filter)
  62                 rev->always_show_header = 0;
  63         if (DIFF_OPT_TST(&rev->diffopt, FOLLOW_RENAMES)) {
  64                 rev->always_show_header = 0;
  65                 if (rev->diffopt.nr_paths != 1)
  66                         usage("git logs can only follow renames on one pathname at a time");
  67         }
  68         for (i = 1; i < argc; i++) {
  69                 const char *arg = argv[i];
  70                 if (!strcmp(arg, "--decorate")) {
  71                         decoration_style = DECORATE_SHORT_REFS;
  72                 } else if (!prefixcmp(arg, "--decorate=")) {
  73                         const char *v = skip_prefix(arg, "--decorate=");
  74                         if (!strcmp(v, "full"))
  75                                 decoration_style = DECORATE_FULL_REFS;
  76                         else if (!strcmp(v, "short"))
  77                                 decoration_style = DECORATE_SHORT_REFS;
  78                         else
  79                                 die("invalid --decorate option: %s", arg);
  80                 } else if (!strcmp(arg, "--source")) {
  81                         rev->show_source = 1;
  82                 } else if (!strcmp(arg, "-h")) {
  83                         usage(builtin_log_usage);
  84                 } else
  85                         die("unrecognized argument: %s", arg);
  86         }
  87         if (decoration_style) {
  88                 rev->show_decorations = 1;
  89                 load_ref_decorations(decoration_style);
  90         }
  91 }
  92
  93 /*
  94  * This gives a rough estimate for how many commits we
  95  * will print out in the list.
  96  */
  97 static int estimate_commit_count(struct rev_info *rev, struct commit_list *list)
  98 {
  99         int n = 0;
 100
 101         while (list) {
 102                 struct commit *commit = list->item;
 103                 unsigned int flags = commit->object.flags;
 104                 list = list->next;
 105                 if (!(flags & (TREESAME | UNINTERESTING)))
 106                         n++;
 107         }
 108         return n;
 109 }
 110
 111 static void show_early_header(struct rev_info *rev, const char *stage, int nr)
 112 {
 113         if (rev->shown_one) {
 114                 rev->shown_one = 0;
 115                 if (rev->commit_format != CMIT_FMT_ONELINE)
 116                         putchar(rev->diffopt.line_termination);
 117         }
 118         printf("Final output: %d %s\n", nr, stage);
 119 }
 120
 121 static struct itimerval early_output_timer;
 122
 123 static void log_show_early(struct rev_info *revs, struct commit_list *list)
 124 {
 125         int i = revs->early_output;
 126         int show_header = 1;
 127
 128         sort_in_topological_order(&list, revs->lifo);
 129         while (list && i) {
 130                 struct commit *commit = list->item;
 131                 switch (simplify_commit(revs, commit)) {
 132                 case commit_show:
 133                         if (show_header) {
 134                                 int n = estimate_commit_count(revs, list);
 135                                 show_early_header(revs, "incomplete", n);
 136                                 show_header = 0;
 137                         }
 138                         log_tree_commit(revs, commit);
 139                         i--;
 140                         break;
 141                 case commit_ignore:
 142                         break;
 143                 case commit_error:
 144                         return;
 145                 }
 146                 list = list->next;
 147         }
 148
 149         /* Did we already get enough commits for the early output? */
 150         if (!i)
 151                 return;
 152
 153         /*
 154          * ..if no, then repeat it twice a second until we
 155          * do.
 156          *
 157          * NOTE! We don't use "it_interval", because if the
 158          * reader isn't listening, we want our output to be
 159          * throttled by the writing, and not have the timer
 160          * trigger every second even if we're blocked on a
 161          * reader!
 162          */
 163         early_output_timer.it_value.tv_sec = 0;
 164         early_output_timer.it_value.tv_usec = 500000;
 165         setitimer(ITIMER_REAL, &early_output_timer, NULL);
 166 }
 167
 168 static void early_output(int signal)
 169 {
 170         show_early_output = log_show_early;
 171 }
 172
 173 static void setup_early_output(struct rev_info *rev)
 174 {
 175         struct sigaction sa;
 176
 177         /*
 178          * Set up the signal handler, minimally intrusively:
 179          * we only set a single volatile integer word (not
 180          * using sigatomic_t - trying to avoid unnecessary
 181          * system dependencies and headers), and using
 182          * SA_RESTART.
 183          */
 184         memset(&sa, 0, sizeof(sa));
 185         sa.sa_handler = early_output;
 186         sigemptyset(&sa.sa_mask);
 187         sa.sa_flags = SA_RESTART;
 188         sigaction(SIGALRM, &sa, NULL);
 189
 190         /*
 191          * If we can get the whole output in less than a
 192          * tenth of a second, don't even bother doing the
 193          * early-output thing..
 194          *
 195          * This is a one-time-only trigger.
 196          */
 197         early_output_timer.it_value.tv_sec = 0;
 198         early_output_timer.it_value.tv_usec = 100000;
 199         setitimer(ITIMER_REAL, &early_output_timer, NULL);
 200 }
 201
 202 static void finish_early_output(struct rev_info *rev)
 203 {
 204         int n = estimate_commit_count(rev, rev->commits);
 205         signal(SIGALRM, SIG_IGN);
 206         show_early_header(rev, "done", n);
 207 }
 208
 209 static int cmd_log_walk(struct rev_info *rev)
 210 {
 211         struct commit *commit;
 212
 213         if (rev->early_output)
 214                 setup_early_output(rev);
 215
 216         if (prepare_revision_walk(rev))
 217                 die("revision walk setup failed");
 218
 219         if (rev->early_output)
 220                 finish_early_output(rev);
 221
 222         /*
 223          * For --check and --exit-code, the exit code is based on CHECK_FAILED
 224          * and HAS_CHANGES being accumulated in rev->diffopt, so be careful to
 225          * retain that state information if replacing rev->diffopt in this loop
 226          */
 227         while ((commit = get_revision(rev)) != NULL) {
 228                 log_tree_commit(rev, commit);
 229                 if (!rev->reflog_info) {
 230                         /* we allow cycles in reflog ancestry */
 231                         free(commit->buffer);
 232                         commit->buffer = NULL;
 233                 }
 234                 free_commit_list(commit->parents);
 235                 commit->parents = NULL;
 236         }
 237         if (rev->diffopt.output_format & DIFF_FORMAT_CHECKDIFF &&
 238             DIFF_OPT_TST(&rev->diffopt, CHECK_FAILED)) {
 239                 return 02;
 240         }
 241         return diff_result_code(&rev->diffopt, 0);
 242 }
 243
 244 static int git_log_config(const char *var, const char *value, void *cb)
 245 {
 246         if (!strcmp(var, "format.pretty"))
 247                 return git_config_string(&fmt_pretty, var, value);
 248         if (!strcmp(var, "format.subjectprefix"))
 249                 return git_config_string(&fmt_patch_subject_prefix, var, value);
 250         if (!strcmp(var, "log.date"))
 251                 return git_config_string(&default_date_mode, var, value);
 252         if (!strcmp(var, "log.showroot")) {
 253                 default_show_root = git_config_bool(var, value);
 254                 return 0;
 255         }
 256         return git_diff_ui_config(var, value, cb);
 257 }
 258
 259 int cmd_whatchanged(int argc, const char **argv, const char *prefix)
 260 {
 261         struct rev_info rev;
 262
 263         git_config(git_log_config, NULL);
 264
 265         if (diff_use_color_default == -1)
 266                 diff_use_color_default = git_use_color_default;
 267
 268         init_revisions(&rev, prefix);
 269         rev.diff = 1;
 270         rev.simplify_history = 0;
 271         cmd_log_init(argc, argv, prefix, &rev);
 272         if (!rev.diffopt.output_format)
 273                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
 274         return cmd_log_walk(&rev);
 275 }
 276
 277 static void show_tagger(char *buf, int len, struct rev_info *rev)
 278 {
 279         struct strbuf out = STRBUF_INIT;
 280
 281         pp_user_info("Tagger", rev->commit_format, &out, buf, rev->date_mode,
 282                 git_log_output_encoding ?
 283                 git_log_output_encoding: git_commit_encoding);
 284         printf("%s", out.buf);
 285         strbuf_release(&out);
 286 }
 287
 288 static int show_object(const unsigned char *sha1, int show_tag_object,
 289         struct rev_info *rev)
 290 {
 291         unsigned long size;
 292         enum object_type type;
 293         char *buf = read_sha1_file(sha1, &type, &size);
 294         int offset = 0;
 295
 296         if (!buf)
 297                 return error("Could not read object %s", sha1_to_hex(sha1));
 298
 299         if (show_tag_object)
 300                 while (offset < size && buf[offset] != '\n') {
 301                         int new_offset = offset + 1;
 302                         while (new_offset < size && buf[new_offset++] != '\n')
 303                                 ; /* do nothing */
 304                         if (!prefixcmp(buf + offset, "tagger "))
 305                                 show_tagger(buf + offset + 7,
 306                                             new_offset - offset - 7, rev);
 307                         offset = new_offset;
 308                 }
 309
 310         if (offset < size)
 311                 fwrite(buf + offset, size - offset, 1, stdout);
 312         free(buf);
 313         return 0;
 314 }
 315
 316 static int show_tree_object(const unsigned char *sha1,
 317                 const char *base, int baselen,
 318                 const char *pathname, unsigned mode, int stage, void *context)
 319 {
 320         printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 321         return 0;
 322 }
 323
 324 int cmd_show(int argc, const char **argv, const char *prefix)
 325 {
 326         struct rev_info rev;
 327         struct object_array_entry *objects;
 328         int i, count, ret = 0;
 329
 330         git_config(git_log_config, NULL);
 331
 332         if (diff_use_color_default == -1)
 333                 diff_use_color_default = git_use_color_default;
 334
 335         init_revisions(&rev, prefix);
 336         rev.diff = 1;
 337         rev.combine_merges = 1;
 338         rev.dense_combined_merges = 1;
 339         rev.always_show_header = 1;
 340         rev.ignore_merges = 0;
 341         rev.no_walk = 1;
 342         cmd_log_init(argc, argv, prefix, &rev);
 343
 344         count = rev.pending.nr;
 345         objects = rev.pending.objects;
 346         for (i = 0; i < count && !ret; i++) {
 347                 struct object *o = objects[i].item;
 348                 const char *name = objects[i].name;
 349                 switch (o->type) {
 350                 case OBJ_BLOB:
 351                         ret = show_object(o->sha1, 0, NULL);
 352                         break;
 353                 case OBJ_TAG: {
 354                         struct tag *t = (struct tag *)o;
 355
 356                         if (rev.shown_one)
 357                                 putchar('\n');
 358                         printf("%stag %s%s\n",
 359                                         diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
 360                                         t->tag,
 361                                         diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 362                         ret = show_object(o->sha1, 1, &rev);
 363                         rev.shown_one = 1;
 364                         if (ret)
 365                                 break;
 366                         o = parse_object(t->tagged->sha1);
 367                         if (!o)
 368                                 ret = error("Could not read object %s",
 369                                             sha1_to_hex(t->tagged->sha1));
 370                         objects[i].item = o;
 371                         i--;
 372                         break;
 373                 }
 374                 case OBJ_TREE:
 375                         if (rev.shown_one)
 376                                 putchar('\n');
 377                         printf("%stree %s%s\n\n",
 378                                         diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
 379                                         name,
 380                                         diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 381                         read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 382                                         show_tree_object, NULL);
 383                         rev.shown_one = 1;
 384                         break;
 385                 case OBJ_COMMIT:
 386                         rev.pending.nr = rev.pending.alloc = 0;
 387                         rev.pending.objects = NULL;
 388                         add_object_array(o, name, &rev.pending);
 389                         ret = cmd_log_walk(&rev);
 390                         break;
 391                 default:
 392                         ret = error("Unknown type: %d", o->type);
 393                 }
 394         }
 395         free(objects);
 396         return ret;
 397 }
 398
 399 /*
 400  * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
 401  */
 402 int cmd_log_reflog(int argc, const char **argv, const char *prefix)
 403 {
 404         struct rev_info rev;
 405
 406         git_config(git_log_config, NULL);
 407
 408         if (diff_use_color_default == -1)
 409                 diff_use_color_default = git_use_color_default;
 410
 411         init_revisions(&rev, prefix);
 412         init_reflog_walk(&rev.reflog_info);
 413         rev.abbrev_commit = 1;
 414         rev.verbose_header = 1;
 415         cmd_log_init(argc, argv, prefix, &rev);
 416
 417         /*
 418          * This means that we override whatever commit format the user gave
 419          * on the cmd line.  Sad, but cmd_log_init() currently doesn't
 420          * allow us to set a different default.
 421          */
 422         rev.commit_format = CMIT_FMT_ONELINE;
 423         rev.use_terminator = 1;
 424         rev.always_show_header = 1;
 425
 426         /*
 427          * We get called through "git reflog", so unlike the other log
 428          * routines, we need to set up our pager manually..
 429          */
 430         setup_pager();
 431
 432         return cmd_log_walk(&rev);
 433 }
 434
 435 int cmd_log(int argc, const char **argv, const char *prefix)
 436 {
 437         struct rev_info rev;
 438
 439         git_config(git_log_config, NULL);
 440
 441         if (diff_use_color_default == -1)
 442                 diff_use_color_default = git_use_color_default;
 443
 444         init_revisions(&rev, prefix);
 445         rev.always_show_header = 1;
 446         cmd_log_init(argc, argv, prefix, &rev);
 447         return cmd_log_walk(&rev);
 448 }
 449
 450 /* format-patch */
 451
 452 static const char *fmt_patch_suffix = ".patch";
 453 static int numbered = 0;
 454 static int auto_number = 1;
 455
 456 static char *default_attach = NULL;
 457
 458 static char **extra_hdr;
 459 static int extra_hdr_nr;
 460 static int extra_hdr_alloc;
 461
 462 static char **extra_to;
 463 static int extra_to_nr;
 464 static int extra_to_alloc;
 465
 466 static char **extra_cc;
 467 static int extra_cc_nr;
 468 static int extra_cc_alloc;
 469
 470 static void add_header(const char *value)
 471 {
 472         int len = strlen(value);
 473         while (len && value[len - 1] == '\n')
 474                 len--;
 475         if (!strncasecmp(value, "to: ", 4)) {
 476                 ALLOC_GROW(extra_to, extra_to_nr + 1, extra_to_alloc);
 477                 extra_to[extra_to_nr++] = xstrndup(value + 4, len - 4);
 478                 return;
 479         }
 480         if (!strncasecmp(value, "cc: ", 4)) {
 481                 ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
 482                 extra_cc[extra_cc_nr++] = xstrndup(value + 4, len - 4);
 483                 return;
 484         }
 485         ALLOC_GROW(extra_hdr, extra_hdr_nr + 1, extra_hdr_alloc);
 486         extra_hdr[extra_hdr_nr++] = xstrndup(value, len);
 487 }
 488
 489 #define THREAD_SHALLOW 1
 490 #define THREAD_DEEP 2
 491 static int thread = 0;
 492 static int do_signoff = 0;
 493
 494 static int git_format_config(const char *var, const char *value, void *cb)
 495 {
 496         if (!strcmp(var, "format.headers")) {
 497                 if (!value)
 498                         die("format.headers without value");
 499                 add_header(value);
 500                 return 0;
 501         }
 502         if (!strcmp(var, "format.suffix"))
 503                 return git_config_string(&fmt_patch_suffix, var, value);
 504         if (!strcmp(var, "format.cc")) {
 505                 if (!value)
 506                         return config_error_nonbool(var);
 507                 ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
 508                 extra_cc[extra_cc_nr++] = xstrdup(value);
 509                 return 0;
 510         }
 511         if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 512                 return 0;
 513         }
 514         if (!strcmp(var, "format.numbered")) {
 515                 if (value && !strcasecmp(value, "auto")) {
 516                         auto_number = 1;
 517                         return 0;
 518                 }
 519                 numbered = git_config_bool(var, value);
 520                 auto_number = auto_number && numbered;
 521                 return 0;
 522         }
 523         if (!strcmp(var, "format.attach")) {
 524                 if (value && *value)
 525                         default_attach = xstrdup(value);
 526                 else
 527                         default_attach = xstrdup(git_version_string);
 528                 return 0;
 529         }
 530         if (!strcmp(var, "format.thread")) {
 531                 if (value && !strcasecmp(value, "deep")) {
 532                         thread = THREAD_DEEP;
 533                         return 0;
 534                 }
 535                 if (value && !strcasecmp(value, "shallow")) {
 536                         thread = THREAD_SHALLOW;
 537                         return 0;
 538                 }
 539                 thread = git_config_bool(var, value) && THREAD_SHALLOW;
 540                 return 0;
 541         }
 542         if (!strcmp(var, "format.signoff")) {
 543                 do_signoff = git_config_bool(var, value);
 544                 return 0;
 545         }
 546
 547         return git_log_config(var, value, cb);
 548 }
 549
 550 static FILE *realstdout = NULL;
 551 static const char *output_directory = NULL;
 552 static int outdir_offset;
 553
 554 static int reopen_stdout(struct commit *commit, struct rev_info *rev)
 555 {
 556         struct strbuf filename = STRBUF_INIT;
 557         int suffix_len = strlen(fmt_patch_suffix) + 1;
 558
 559         if (output_directory) {
 560                 strbuf_addstr(&filename, output_directory);
 561                 if (filename.len >=
 562                     PATH_MAX - FORMAT_PATCH_NAME_MAX - suffix_len)
 563                         return error("name of output directory is too long");
 564                 if (filename.buf[filename.len - 1] != '/')
 565                         strbuf_addch(&filename, '/');
 566         }
 567
 568         get_patch_filename(commit, rev->nr, fmt_patch_suffix, &filename);
 569
 570         if (!DIFF_OPT_TST(&rev->diffopt, QUIET))
 571                 fprintf(realstdout, "%s\n", filename.buf + outdir_offset);
 572
 573         if (freopen(filename.buf, "w", stdout) == NULL)
 574                 return error("Cannot open patch file %s", filename.buf);
 575
 576         strbuf_release(&filename);
 577         return 0;
 578 }
 579
 580 static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const char *prefix)
 581 {
 582         struct rev_info check_rev;
 583         struct commit *commit;
 584         struct object *o1, *o2;
 585         unsigned flags1, flags2;
 586
 587         if (rev->pending.nr != 2)
 588                 die("Need exactly one range.");
 589
 590         o1 = rev->pending.objects[0].item;
 591         flags1 = o1->flags;
 592         o2 = rev->pending.objects[1].item;
 593         flags2 = o2->flags;
 594
 595         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 596                 die("Not a range.");
 597
 598         init_patch_ids(ids);
 599
 600         /* given a range a..b get all patch ids for b..a */
 601         init_revisions(&check_rev, prefix);
 602         o1->flags ^= UNINTERESTING;
 603         o2->flags ^= UNINTERESTING;
 604         add_pending_object(&check_rev, o1, "o1");
 605         add_pending_object(&check_rev, o2, "o2");
 606         if (prepare_revision_walk(&check_rev))
 607                 die("revision walk setup failed");
 608
 609         while ((commit = get_revision(&check_rev)) != NULL) {
 610                 /* ignore merges */
 611                 if (commit->parents && commit->parents->next)
 612                         continue;
 613
 614                 add_commit_patch_id(commit, ids);
 615         }
 616
 617         /* reset for next revision walk */
 618         clear_commit_marks((struct commit *)o1,
 619                         SEEN | UNINTERESTING | SHOWN | ADDED);
 620         clear_commit_marks((struct commit *)o2,
 621                         SEEN | UNINTERESTING | SHOWN | ADDED);
 622         o1->flags = flags1;
 623         o2->flags = flags2;
 624 }
 625
 626 static void gen_message_id(struct rev_info *info, char *base)
 627 {
 628         const char *committer = git_committer_info(IDENT_WARN_ON_NO_NAME);
 629         const char *email_start = strrchr(committer, '<');
 630         const char *email_end = strrchr(committer, '>');
 631         struct strbuf buf = STRBUF_INIT;
 632         if (!email_start || !email_end || email_start > email_end - 1)
 633                 die("Could not extract email from committer identity.");
 634         strbuf_addf(&buf, "%s.%lu.git.%.*s", base,
 635                     (unsigned long) time(NULL),
 636                     (int)(email_end - email_start - 1), email_start + 1);
 637         info->message_id = strbuf_detach(&buf, NULL);
 638 }
 639
 640 static void make_cover_letter(struct rev_info *rev, int use_stdout,
 641                               int numbered, int numbered_files,
 642                               struct commit *origin,
 643                               int nr, struct commit **list, struct commit *head)
 644 {
 645         const char *committer;
 646         const char *subject_start = NULL;
 647         const char *body = "*** SUBJECT HERE ***\n\n*** BLURB HERE ***\n";
 648         const char *msg;
 649         const char *extra_headers = rev->extra_headers;
 650         struct shortlog log;
 651         struct strbuf sb = STRBUF_INIT;
 652         int i;
 653         const char *encoding = "UTF-8";
 654         struct diff_options opts;
 655         int need_8bit_cte = 0;
 656         struct commit *commit = NULL;
 657
 658         if (rev->commit_format != CMIT_FMT_EMAIL)
 659                 die("Cover letter needs email format");
 660
 661         committer = git_committer_info(0);
 662
 663         if (!numbered_files) {
 664                 /*
 665                  * We fake a commit for the cover letter so we get the filename
 666                  * desired.
 667                  */
 668                 commit = xcalloc(1, sizeof(*commit));
 669                 commit->buffer = xmalloc(400);
 670                 snprintf(commit->buffer, 400,
 671                         "tree 0000000000000000000000000000000000000000\n"
 672                         "parent %s\n"
 673                         "author %s\n"
 674                         "committer %s\n\n"
 675                         "cover letter\n",
 676                         sha1_to_hex(head->object.sha1), committer, committer);
 677         }
 678
 679         if (!use_stdout && reopen_stdout(commit, rev))
 680                 return;
 681
 682         if (commit) {
 683
 684                 free(commit->buffer);
 685                 free(commit);
 686         }
 687
 688         log_write_email_headers(rev, head, &subject_start, &extra_headers,
 689                                 &need_8bit_cte);
 690
 691         for (i = 0; !need_8bit_cte && i < nr; i++)
 692                 if (has_non_ascii(list[i]->buffer))
 693                         need_8bit_cte = 1;
 694
 695         msg = body;
 696         pp_user_info(NULL, CMIT_FMT_EMAIL, &sb, committer, DATE_RFC2822,
 697                      encoding);
 698         pp_title_line(CMIT_FMT_EMAIL, &msg, &sb, subject_start, extra_headers,
 699                       encoding, need_8bit_cte);
 700         pp_remainder(CMIT_FMT_EMAIL, &msg, &sb, 0);
 701         printf("%s\n", sb.buf);
 702
 703         strbuf_release(&sb);
 704
 705         shortlog_init(&log);
 706         log.wrap_lines = 1;
 707         log.wrap = 72;
 708         log.in1 = 2;
 709         log.in2 = 4;
 710         for (i = 0; i < nr; i++)
 711                 shortlog_add_commit(&log, list[i]);
 712
 713         shortlog_output(&log);
 714
 715         /*
 716          * We can only do diffstat with a unique reference point
 717          */
 718         if (!origin)
 719                 return;
 720
 721         memcpy(&opts, &rev->diffopt, sizeof(opts));
 722         opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
 723
 724         diff_setup_done(&opts);
 725
 726         diff_tree_sha1(origin->tree->object.sha1,
 727                        head->tree->object.sha1,
 728                        "", &opts);
 729         diffcore_std(&opts);
 730         diff_flush(&opts);
 731
 732         printf("\n");
 733 }
 734
 735 static const char *clean_message_id(const char *msg_id)
 736 {
 737         char ch;
 738         const char *a, *z, *m;
 739
 740         m = msg_id;
 741         while ((ch = *m) && (isspace(ch) || (ch == '<')))
 742                 m++;
 743         a = m;
 744         z = NULL;
 745         while ((ch = *m)) {
 746                 if (!isspace(ch) && (ch != '>'))
 747                         z = m;
 748                 m++;
 749         }
 750         if (!z)
 751                 die("insane in-reply-to: %s", msg_id);
 752         if (++z == m)
 753                 return a;
 754         return xmemdupz(a, z - a);
 755 }
 756
 757 static const char *set_outdir(const char *prefix, const char *output_directory)
 758 {
 759         if (output_directory && is_absolute_path(output_directory))
 760                 return output_directory;
 761
 762         if (!prefix || !*prefix) {
 763                 if (output_directory)
 764                         return output_directory;
 765                 /* The user did not explicitly ask for "./" */
 766                 outdir_offset = 2;
 767                 return "./";
 768         }
 769
 770         outdir_offset = strlen(prefix);
 771         if (!output_directory)
 772                 return prefix;
 773
 774         return xstrdup(prefix_filename(prefix, outdir_offset,
 775                                        output_directory));
 776 }
 777
 778 static const char * const builtin_format_patch_usage[] = {
 779         "git format-patch [options] [<since> | <revision range>]",
 780         NULL
 781 };
 782
 783 static int keep_subject = 0;
 784
 785 static int keep_callback(const struct option *opt, const char *arg, int unset)
 786 {
 787         ((struct rev_info *)opt->value)->total = -1;
 788         keep_subject = 1;
 789         return 0;
 790 }
 791
 792 static int subject_prefix = 0;
 793
 794 static int subject_prefix_callback(const struct option *opt, const char *arg,
 795                             int unset)
 796 {
 797         subject_prefix = 1;
 798         ((struct rev_info *)opt->value)->subject_prefix = arg;
 799         return 0;
 800 }
 801
 802 static int numbered_cmdline_opt = 0;
 803
 804 static int numbered_callback(const struct option *opt, const char *arg,
 805                              int unset)
 806 {
 807         *(int *)opt->value = numbered_cmdline_opt = unset ? 0 : 1;
 808         if (unset)
 809                 auto_number =  0;
 810         return 0;
 811 }
 812
 813 static int no_numbered_callback(const struct option *opt, const char *arg,
 814                                 int unset)
 815 {
 816         return numbered_callback(opt, arg, 1);
 817 }
 818
 819 static int output_directory_callback(const struct option *opt, const char *arg,
 820                               int unset)
 821 {
 822         const char **dir = (const char **)opt->value;
 823         if (*dir)
 824                 die("Two output directories?");
 825         *dir = arg;
 826         return 0;
 827 }
 828
 829 static int thread_callback(const struct option *opt, const char *arg, int unset)
 830 {
 831         int *thread = (int *)opt->value;
 832         if (unset)
 833                 *thread = 0;
 834         else if (!arg || !strcmp(arg, "shallow"))
 835                 *thread = THREAD_SHALLOW;
 836         else if (!strcmp(arg, "deep"))
 837                 *thread = THREAD_DEEP;
 838         else
 839                 return 1;
 840         return 0;
 841 }
 842
 843 static int attach_callback(const struct option *opt, const char *arg, int unset)
 844 {
 845         struct rev_info *rev = (struct rev_info *)opt->value;
 846         if (unset)
 847                 rev->mime_boundary = NULL;
 848         else if (arg)
 849                 rev->mime_boundary = arg;
 850         else
 851                 rev->mime_boundary = git_version_string;
 852         rev->no_inline = unset ? 0 : 1;
 853         return 0;
 854 }
 855
 856 static int inline_callback(const struct option *opt, const char *arg, int unset)
 857 {
 858         struct rev_info *rev = (struct rev_info *)opt->value;
 859         if (unset)
 860                 rev->mime_boundary = NULL;
 861         else if (arg)
 862                 rev->mime_boundary = arg;
 863         else
 864                 rev->mime_boundary = git_version_string;
 865         rev->no_inline = 0;
 866         return 0;
 867 }
 868
 869 static int header_callback(const struct option *opt, const char *arg, int unset)
 870 {
 871         add_header(arg);
 872         return 0;
 873 }
 874
 875 static int cc_callback(const struct option *opt, const char *arg, int unset)
 876 {
 877         ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
 878         extra_cc[extra_cc_nr++] = xstrdup(arg);
 879         return 0;
 880 }
 881
 882 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 883 {
 884         struct commit *commit;
 885         struct commit **list = NULL;
 886         struct rev_info rev;
 887         int nr = 0, total, i;
 888         int use_stdout = 0;
 889         int start_number = -1;
 890         int numbered_files = 0;         /* _just_ numbers */
 891         int ignore_if_in_upstream = 0;
 892         int cover_letter = 0;
 893         int boundary_count = 0;
 894         int no_binary_diff = 0;
 895         struct commit *origin = NULL, *head = NULL;
 896         const char *in_reply_to = NULL;
 897         struct patch_ids ids;
 898         char *add_signoff = NULL;
 899         struct strbuf buf = STRBUF_INIT;
 900         int use_patch_format = 0;
 901         const struct option builtin_format_patch_options[] = {
 902                 { OPTION_CALLBACK, 'n', "numbered", &numbered, NULL,
 903                             "use [PATCH n/m] even with a single patch",
 904                             PARSE_OPT_NOARG, numbered_callback },
 905                 { OPTION_CALLBACK, 'N', "no-numbered", &numbered, NULL,
 906                             "use [PATCH] even with multiple patches",
 907                             PARSE_OPT_NOARG, no_numbered_callback },
 908                 OPT_BOOLEAN('s', "signoff", &do_signoff, "add Signed-off-by:"),
 909                 OPT_BOOLEAN(0, "stdout", &use_stdout,
 910                             "print patches to standard out"),
 911                 OPT_BOOLEAN(0, "cover-letter", &cover_letter,
 912                             "generate a cover letter"),
 913                 OPT_BOOLEAN(0, "numbered-files", &numbered_files,
 914                             "use simple number sequence for output file names"),
 915                 OPT_STRING(0, "suffix", &fmt_patch_suffix, "sfx",
 916                             "use <sfx> instead of '.patch'"),
 917                 OPT_INTEGER(0, "start-number", &start_number,
 918                             "start numbering patches at <n> instead of 1"),
 919                 { OPTION_CALLBACK, 0, "subject-prefix", &rev, "prefix",
 920                             "Use [<prefix>] instead of [PATCH]",
 921                             PARSE_OPT_NONEG, subject_prefix_callback },
 922                 { OPTION_CALLBACK, 'o', "output-directory", &output_directory,
 923                             "dir", "store resulting files in <dir>",
 924                             PARSE_OPT_NONEG, output_directory_callback },
 925                 { OPTION_CALLBACK, 'k', "keep-subject", &rev, NULL,
 926                             "don't strip/add [PATCH]",
 927                             PARSE_OPT_NOARG | PARSE_OPT_NONEG, keep_callback },
 928                 OPT_BOOLEAN(0, "no-binary", &no_binary_diff,
 929                             "don't output binary diffs"),
 930                 OPT_BOOLEAN('p', NULL, &use_patch_format,
 931                         "show patch format instead of default (patch + stat)"),
 932                 OPT_BOOLEAN(0, "ignore-if-in-upstream", &ignore_if_in_upstream,
 933                             "don't include a patch matching a commit upstream"),
 934                 OPT_GROUP("Messaging"),
 935                 { OPTION_CALLBACK, 0, "add-header", NULL, "header",
 936                             "add email header", PARSE_OPT_NONEG,
 937                             header_callback },
 938                 { OPTION_CALLBACK, 0, "cc", NULL, "email", "add Cc: header",
 939                             PARSE_OPT_NONEG, cc_callback },
 940                 OPT_STRING(0, "in-reply-to", &in_reply_to, "message-id",
 941                             "make first mail a reply to <message-id>"),
 942                 { OPTION_CALLBACK, 0, "attach", &rev, "boundary",
 943                             "attach the patch", PARSE_OPT_OPTARG,
 944                             attach_callback },
 945                 { OPTION_CALLBACK, 0, "inline", &rev, "boundary",
 946                             "inline the patch",
 947                             PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
 948                             inline_callback },
 949                 { OPTION_CALLBACK, 0, "thread", &thread, "style",
 950                             "enable message threading, styles: shallow, deep",
 951                             PARSE_OPT_OPTARG, thread_callback },
 952                 OPT_END()
 953         };
 954
 955         git_config(git_format_config, NULL);
 956         init_revisions(&rev, prefix);
 957         rev.commit_format = CMIT_FMT_EMAIL;
 958         rev.verbose_header = 1;
 959         rev.diff = 1;
 960         rev.combine_merges = 0;
 961         rev.ignore_merges = 1;
 962         DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 963
 964         rev.subject_prefix = fmt_patch_subject_prefix;
 965
 966         if (default_attach) {
 967                 rev.mime_boundary = default_attach;
 968                 rev.no_inline = 1;
 969         }
 970
 971         /*
 972          * Parse the arguments before setup_revisions(), or something
 973          * like "git format-patch -o a123 HEAD^.." may fail; a123 is
 974          * possibly a valid SHA1.
 975          */
 976         argc = parse_options(argc, argv, prefix, builtin_format_patch_options,
 977                              builtin_format_patch_usage,
 978                              PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN);
 979
 980         if (do_signoff) {
 981                 const char *committer;
 982                 const char *endpos;
 983                 committer = git_committer_info(IDENT_ERROR_ON_NO_NAME);
 984                 endpos = strchr(committer, '>');
 985                 if (!endpos)
 986                         die("bogus committer info %s", committer);
 987                 add_signoff = xmemdupz(committer, endpos - committer + 1);
 988         }
 989
 990         for (i = 0; i < extra_hdr_nr; i++) {
 991                 strbuf_addstr(&buf, extra_hdr[i]);
 992                 strbuf_addch(&buf, '\n');
 993         }
 994
 995         if (extra_to_nr)
 996                 strbuf_addstr(&buf, "To: ");
 997         for (i = 0; i < extra_to_nr; i++) {
 998                 if (i)
 999                         strbuf_addstr(&buf, "    ");
1000                 strbuf_addstr(&buf, extra_to[i]);
1001                 if (i + 1 < extra_to_nr)
1002                         strbuf_addch(&buf, ',');
1003                 strbuf_addch(&buf, '\n');
1004         }
1005
1006         if (extra_cc_nr)
1007                 strbuf_addstr(&buf, "Cc: ");
1008         for (i = 0; i < extra_cc_nr; i++) {
1009                 if (i)
1010                         strbuf_addstr(&buf, "    ");
1011                 strbuf_addstr(&buf, extra_cc[i]);
1012                 if (i + 1 < extra_cc_nr)
1013                         strbuf_addch(&buf, ',');
1014                 strbuf_addch(&buf, '\n');
1015         }
1016
1017         rev.extra_headers = strbuf_detach(&buf, NULL);
1018
1019         if (start_number < 0)
1020                 start_number = 1;
1021
1022         /*
1023          * If numbered is set solely due to format.numbered in config,
1024          * and it would conflict with --keep-subject (-k) from the
1025          * command line, reset "numbered".
1026          */
1027         if (numbered && keep_subject && !numbered_cmdline_opt)
1028                 numbered = 0;
1029
1030         if (numbered && keep_subject)
1031                 die ("-n and -k are mutually exclusive.");
1032         if (keep_subject && subject_prefix)
1033                 die ("--subject-prefix and -k are mutually exclusive.");
1034
1035         argc = setup_revisions(argc, argv, &rev, "HEAD");
1036         if (argc > 1)
1037                 die ("unrecognized argument: %s", argv[1]);
1038
1039         if (use_patch_format)
1040                 rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
1041         else if (!rev.diffopt.output_format ||
1042                   rev.diffopt.output_format == DIFF_FORMAT_PATCH)
1043                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH;
1044
1045         if (!DIFF_OPT_TST(&rev.diffopt, TEXT) && !no_binary_diff)
1046                 DIFF_OPT_SET(&rev.diffopt, BINARY);
1047
1048         if (!use_stdout)
1049                 output_directory = set_outdir(prefix, output_directory);
1050
1051         if (output_directory) {
1052                 if (use_stdout)
1053                         die("standard output, or directory, which one?");
1054                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
1055                         die_errno("Could not create directory '%s'",
1056                                   output_directory);
1057         }
1058
1059         if (rev.pending.nr == 1) {
1060                 if (rev.max_count < 0 && !rev.show_root_diff) {
1061                         /*
1062                          * This is traditional behaviour of "git format-patch
1063                          * origin" that prepares what the origin side still
1064                          * does not have.
1065                          */
1066                         rev.pending.objects[0].item->flags |= UNINTERESTING;
1067                         add_head_to_pending(&rev);
1068                 }
1069                 /*
1070                  * Otherwise, it is "format-patch -22 HEAD", and/or
1071                  * "format-patch --root HEAD".  The user wants
1072                  * get_revision() to do the usual traversal.
1073                  */
1074         }
1075
1076         /*
1077          * We cannot move this anywhere earlier because we do want to
1078          * know if --root was given explicitly from the comand line.
1079          */
1080         rev.show_root_diff = 1;
1081
1082         if (cover_letter) {
1083                 /* remember the range */
1084                 int i;
1085                 for (i = 0; i < rev.pending.nr; i++) {
1086                         struct object *o = rev.pending.objects[i].item;
1087                         if (!(o->flags & UNINTERESTING))
1088                                 head = (struct commit *)o;
1089                 }
1090                 /* We can't generate a cover letter without any patches */
1091                 if (!head)
1092                         return 0;
1093         }
1094
1095         if (ignore_if_in_upstream)
1096                 get_patch_ids(&rev, &ids, prefix);
1097
1098         if (!use_stdout)
1099                 realstdout = xfdopen(xdup(1), "w");
1100
1101         if (prepare_revision_walk(&rev))
1102                 die("revision walk setup failed");
1103         rev.boundary = 1;
1104         while ((commit = get_revision(&rev)) != NULL) {
1105                 if (commit->object.flags & BOUNDARY) {
1106                         boundary_count++;
1107                         origin = (boundary_count == 1) ? commit : NULL;
1108                         continue;
1109                 }
1110
1111                 /* ignore merges */
1112                 if (commit->parents && commit->parents->next)
1113                         continue;
1114
1115                 if (ignore_if_in_upstream &&
1116                                 has_commit_patch_id(commit, &ids))
1117                         continue;
1118
1119                 nr++;
1120                 list = xrealloc(list, nr * sizeof(list[0]));
1121                 list[nr - 1] = commit;
1122         }
1123         total = nr;
1124         if (!keep_subject && auto_number && total > 1)
1125                 numbered = 1;
1126         if (numbered)
1127                 rev.total = total + start_number - 1;
1128         if (in_reply_to || thread || cover_letter)
1129                 rev.ref_message_ids = xcalloc(1, sizeof(struct string_list));
1130         if (in_reply_to) {
1131                 const char *msgid = clean_message_id(in_reply_to);
1132                 string_list_append(msgid, rev.ref_message_ids);
1133         }
1134         rev.numbered_files = numbered_files;
1135         rev.patch_suffix = fmt_patch_suffix;
1136         if (cover_letter) {
1137                 if (thread)
1138                         gen_message_id(&rev, "cover");
1139                 make_cover_letter(&rev, use_stdout, numbered, numbered_files,
1140                                   origin, nr, list, head);
1141                 total++;
1142                 start_number--;
1143         }
1144         rev.add_signoff = add_signoff;
1145         while (0 <= --nr) {
1146                 int shown;
1147                 commit = list[nr];
1148                 rev.nr = total - nr + (start_number - 1);
1149                 /* Make the second and subsequent mails replies to the first */
1150                 if (thread) {
1151                         /* Have we already had a message ID? */
1152                         if (rev.message_id) {
1153                                 /*
1154                                  * For deep threading: make every mail
1155                                  * a reply to the previous one, no
1156                                  * matter what other options are set.
1157                                  *
1158                                  * For shallow threading:
1159                                  *
1160                                  * Without --cover-letter and
1161                                  * --in-reply-to, make every mail a
1162                                  * reply to the one before.
1163                                  *
1164                                  * With --in-reply-to but no
1165                                  * --cover-letter, make every mail a
1166                                  * reply to the <reply-to>.
1167                                  *
1168                                  * With --cover-letter, make every
1169                                  * mail but the cover letter a reply
1170                                  * to the cover letter.  The cover
1171                                  * letter is a reply to the
1172                                  * --in-reply-to, if specified.
1173                                  */
1174                                 if (thread == THREAD_SHALLOW
1175                                     && rev.ref_message_ids->nr > 0
1176                                     && (!cover_letter || rev.nr > 1))
1177                                         free(rev.message_id);
1178                                 else
1179                                         string_list_append(rev.message_id,
1180                                                            rev.ref_message_ids);
1181                         }
1182                         gen_message_id(&rev, sha1_to_hex(commit->object.sha1));
1183                 }
1184
1185                 if (!use_stdout && reopen_stdout(numbered_files ? NULL : commit,
1186                                                  &rev))
1187                         die("Failed to create output files");
1188                 shown = log_tree_commit(&rev, commit);
1189                 free(commit->buffer);
1190                 commit->buffer = NULL;
1191
1192                 /* We put one extra blank line between formatted
1193                  * patches and this flag is used by log-tree code
1194                  * to see if it needs to emit a LF before showing
1195                  * the log; when using one file per patch, we do
1196                  * not want the extra blank line.
1197                  */
1198                 if (!use_stdout)
1199                         rev.shown_one = 0;
1200                 if (shown) {
1201                         if (rev.mime_boundary)
1202                                 printf("\n--%s%s--\n\n\n",
1203                                        mime_boundary_leader,
1204                                        rev.mime_boundary);
1205                         else
1206                                 printf("-- \n%s\n\n", git_version_string);
1207                 }
1208                 if (!use_stdout)
1209                         fclose(stdout);
1210         }
1211         free(list);
1212         if (ignore_if_in_upstream)
1213                 free_patch_ids(&ids);
1214         return 0;
1215 }
1216
1217 static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
1218 {
1219         unsigned char sha1[20];
1220         if (get_sha1(arg, sha1) == 0) {
1221                 struct commit *commit = lookup_commit_reference(sha1);
1222                 if (commit) {
1223                         commit->object.flags |= flags;
1224                         add_pending_object(revs, &commit->object, arg);
1225                         return 0;
1226                 }
1227         }
1228         return -1;
1229 }
1230
1231 static const char cherry_usage[] =
1232 "git cherry [-v] [<upstream> [<head> [<limit>]]]";
1233 int cmd_cherry(int argc, const char **argv, const char *prefix)
1234 {
1235         struct rev_info revs;
1236         struct patch_ids ids;
1237         struct commit *commit;
1238         struct commit_list *list = NULL;
1239         struct branch *current_branch;
1240         const char *upstream;
1241         const char *head = "HEAD";
1242         const char *limit = NULL;
1243         int verbose = 0;
1244
1245         if (argc > 1 && !strcmp(argv[1], "-v")) {
1246                 verbose = 1;
1247                 argc--;
1248                 argv++;
1249         }
1250
1251         if (argc > 1 && !strcmp(argv[1], "-h"))
1252                 usage(cherry_usage);
1253
1254         switch (argc) {
1255         case 4:
1256                 limit = argv[3];
1257                 /* FALLTHROUGH */
1258         case 3:
1259                 head = argv[2];
1260                 /* FALLTHROUGH */
1261         case 2:
1262                 upstream = argv[1];
1263                 break;
1264         default:
1265                 current_branch = branch_get(NULL);
1266                 if (!current_branch || !current_branch->merge
1267                                         || !current_branch->merge[0]
1268                                         || !current_branch->merge[0]->dst) {
1269                         fprintf(stderr, "Could not find a tracked"
1270                                         " remote branch, please"
1271                                         " specify <upstream> manually.\n");
1272                         usage(cherry_usage);
1273                 }
1274
1275                 upstream = current_branch->merge[0]->dst;
1276         }
1277
1278         init_revisions(&revs, prefix);
1279         revs.diff = 1;
1280         revs.combine_merges = 0;
1281         revs.ignore_merges = 1;
1282         DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
1283
1284         if (add_pending_commit(head, &revs, 0))
1285                 die("Unknown commit %s", head);
1286         if (add_pending_commit(upstream, &revs, UNINTERESTING))
1287                 die("Unknown commit %s", upstream);
1288
1289         /* Don't say anything if head and upstream are the same. */
1290         if (revs.pending.nr == 2) {
1291                 struct object_array_entry *o = revs.pending.objects;
1292                 if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
1293                         return 0;
1294         }
1295
1296         get_patch_ids(&revs, &ids, prefix);
1297
1298         if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
1299                 die("Unknown commit %s", limit);
1300
1301         /* reverse the list of commits */
1302         if (prepare_revision_walk(&revs))
1303                 die("revision walk setup failed");
1304         while ((commit = get_revision(&revs)) != NULL) {
1305                 /* ignore merges */
1306                 if (commit->parents && commit->parents->next)
1307                         continue;
1308
1309                 commit_list_insert(commit, &list);
1310         }
1311
1312         while (list) {
1313                 char sign = '+';
1314
1315                 commit = list->item;
1316                 if (has_commit_patch_id(commit, &ids))
1317                         sign = '-';
1318
1319                 if (verbose) {
1320                         struct strbuf buf = STRBUF_INIT;
1321                         struct pretty_print_context ctx = {0};
1322                         pretty_print_commit(CMIT_FMT_ONELINE, commit,
1323                                             &buf, &ctx);
1324                         printf("%c %s %s\n", sign,
1325                                sha1_to_hex(commit->object.sha1), buf.buf);
1326                         strbuf_release(&buf);
1327                 }
1328                 else {
1329                         printf("%c %s\n", sign,
1330                                sha1_to_hex(commit->object.sha1));
1331                 }
1332
1333                 list = list->next;
1334         }
1335
1336         free_patch_ids(&ids);
1337         return 0;
1338 }