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->show_notes_given && !rev->pretty_given)
  62                 rev->show_notes = 1;
  63
  64         if (rev->diffopt.pickaxe || rev->diffopt.filter)
  65                 rev->always_show_header = 0;
  66         if (DIFF_OPT_TST(&rev->diffopt, FOLLOW_RENAMES)) {
  67                 rev->always_show_header = 0;
  68                 if (rev->diffopt.nr_paths != 1)
  69                         usage("git logs can only follow renames on one pathname at a time");
  70         }
  71         for (i = 1; i < argc; i++) {
  72                 const char *arg = argv[i];
  73                 if (!strcmp(arg, "--decorate")) {
  74                         decoration_style = DECORATE_SHORT_REFS;
  75                 } else if (!prefixcmp(arg, "--decorate=")) {
  76                         const char *v = skip_prefix(arg, "--decorate=");
  77                         if (!strcmp(v, "full"))
  78                                 decoration_style = DECORATE_FULL_REFS;
  79                         else if (!strcmp(v, "short"))
  80                                 decoration_style = DECORATE_SHORT_REFS;
  81                         else
  82                                 die("invalid --decorate option: %s", arg);
  83                 } else if (!strcmp(arg, "--source")) {
  84                         rev->show_source = 1;
  85                 } else if (!strcmp(arg, "-h")) {
  86                         usage(builtin_log_usage);
  87                 } else
  88                         die("unrecognized argument: %s", arg);
  89         }
  90         if (decoration_style) {
  91                 rev->show_decorations = 1;
  92                 load_ref_decorations(decoration_style);
  93         }
  94 }
  95
  96 /*
  97  * This gives a rough estimate for how many commits we
  98  * will print out in the list.
  99  */
 100 static int estimate_commit_count(struct rev_info *rev, struct commit_list *list)
 101 {
 102         int n = 0;
 103
 104         while (list) {
 105                 struct commit *commit = list->item;
 106                 unsigned int flags = commit->object.flags;
 107                 list = list->next;
 108                 if (!(flags & (TREESAME | UNINTERESTING)))
 109                         n++;
 110         }
 111         return n;
 112 }
 113
 114 static void show_early_header(struct rev_info *rev, const char *stage, int nr)
 115 {
 116         if (rev->shown_one) {
 117                 rev->shown_one = 0;
 118                 if (rev->commit_format != CMIT_FMT_ONELINE)
 119                         putchar(rev->diffopt.line_termination);
 120         }
 121         printf("Final output: %d %s\n", nr, stage);
 122 }
 123
 124 static struct itimerval early_output_timer;
 125
 126 static void log_show_early(struct rev_info *revs, struct commit_list *list)
 127 {
 128         int i = revs->early_output;
 129         int show_header = 1;
 130
 131         sort_in_topological_order(&list, revs->lifo);
 132         while (list && i) {
 133                 struct commit *commit = list->item;
 134                 switch (simplify_commit(revs, commit)) {
 135                 case commit_show:
 136                         if (show_header) {
 137                                 int n = estimate_commit_count(revs, list);
 138                                 show_early_header(revs, "incomplete", n);
 139                                 show_header = 0;
 140                         }
 141                         log_tree_commit(revs, commit);
 142                         i--;
 143                         break;
 144                 case commit_ignore:
 145                         break;
 146                 case commit_error:
 147                         return;
 148                 }
 149                 list = list->next;
 150         }
 151
 152         /* Did we already get enough commits for the early output? */
 153         if (!i)
 154                 return;
 155
 156         /*
 157          * ..if no, then repeat it twice a second until we
 158          * do.
 159          *
 160          * NOTE! We don't use "it_interval", because if the
 161          * reader isn't listening, we want our output to be
 162          * throttled by the writing, and not have the timer
 163          * trigger every second even if we're blocked on a
 164          * reader!
 165          */
 166         early_output_timer.it_value.tv_sec = 0;
 167         early_output_timer.it_value.tv_usec = 500000;
 168         setitimer(ITIMER_REAL, &early_output_timer, NULL);
 169 }
 170
 171 static void early_output(int signal)
 172 {
 173         show_early_output = log_show_early;
 174 }
 175
 176 static void setup_early_output(struct rev_info *rev)
 177 {
 178         struct sigaction sa;
 179
 180         /*
 181          * Set up the signal handler, minimally intrusively:
 182          * we only set a single volatile integer word (not
 183          * using sigatomic_t - trying to avoid unnecessary
 184          * system dependencies and headers), and using
 185          * SA_RESTART.
 186          */
 187         memset(&sa, 0, sizeof(sa));
 188         sa.sa_handler = early_output;
 189         sigemptyset(&sa.sa_mask);
 190         sa.sa_flags = SA_RESTART;
 191         sigaction(SIGALRM, &sa, NULL);
 192
 193         /*
 194          * If we can get the whole output in less than a
 195          * tenth of a second, don't even bother doing the
 196          * early-output thing..
 197          *
 198          * This is a one-time-only trigger.
 199          */
 200         early_output_timer.it_value.tv_sec = 0;
 201         early_output_timer.it_value.tv_usec = 100000;
 202         setitimer(ITIMER_REAL, &early_output_timer, NULL);
 203 }
 204
 205 static void finish_early_output(struct rev_info *rev)
 206 {
 207         int n = estimate_commit_count(rev, rev->commits);
 208         signal(SIGALRM, SIG_IGN);
 209         show_early_header(rev, "done", n);
 210 }
 211
 212 static int cmd_log_walk(struct rev_info *rev)
 213 {
 214         struct commit *commit;
 215
 216         if (rev->early_output)
 217                 setup_early_output(rev);
 218
 219         if (prepare_revision_walk(rev))
 220                 die("revision walk setup failed");
 221
 222         if (rev->early_output)
 223                 finish_early_output(rev);
 224
 225         /*
 226          * For --check and --exit-code, the exit code is based on CHECK_FAILED
 227          * and HAS_CHANGES being accumulated in rev->diffopt, so be careful to
 228          * retain that state information if replacing rev->diffopt in this loop
 229          */
 230         while ((commit = get_revision(rev)) != NULL) {
 231                 log_tree_commit(rev, commit);
 232                 if (!rev->reflog_info) {
 233                         /* we allow cycles in reflog ancestry */
 234                         free(commit->buffer);
 235                         commit->buffer = NULL;
 236                 }
 237                 free_commit_list(commit->parents);
 238                 commit->parents = NULL;
 239         }
 240         if (rev->diffopt.output_format & DIFF_FORMAT_CHECKDIFF &&
 241             DIFF_OPT_TST(&rev->diffopt, CHECK_FAILED)) {
 242                 return 02;
 243         }
 244         return diff_result_code(&rev->diffopt, 0);
 245 }
 246
 247 static int git_log_config(const char *var, const char *value, void *cb)
 248 {
 249         if (!strcmp(var, "format.pretty"))
 250                 return git_config_string(&fmt_pretty, var, value);
 251         if (!strcmp(var, "format.subjectprefix"))
 252                 return git_config_string(&fmt_patch_subject_prefix, var, value);
 253         if (!strcmp(var, "log.date"))
 254                 return git_config_string(&default_date_mode, var, value);
 255         if (!strcmp(var, "log.showroot")) {
 256                 default_show_root = git_config_bool(var, value);
 257                 return 0;
 258         }
 259         return git_diff_ui_config(var, value, cb);
 260 }
 261
 262 int cmd_whatchanged(int argc, const char **argv, const char *prefix)
 263 {
 264         struct rev_info rev;
 265
 266         git_config(git_log_config, NULL);
 267
 268         if (diff_use_color_default == -1)
 269                 diff_use_color_default = git_use_color_default;
 270
 271         init_revisions(&rev, prefix);
 272         rev.diff = 1;
 273         rev.simplify_history = 0;
 274         cmd_log_init(argc, argv, prefix, &rev);
 275         if (!rev.diffopt.output_format)
 276                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
 277         return cmd_log_walk(&rev);
 278 }
 279
 280 static void show_tagger(char *buf, int len, struct rev_info *rev)
 281 {
 282         struct strbuf out = STRBUF_INIT;
 283
 284         pp_user_info("Tagger", rev->commit_format, &out, buf, rev->date_mode,
 285                 git_log_output_encoding ?
 286                 git_log_output_encoding: git_commit_encoding);
 287         printf("%s", out.buf);
 288         strbuf_release(&out);
 289 }
 290
 291 static int show_object(const unsigned char *sha1, int show_tag_object,
 292         struct rev_info *rev)
 293 {
 294         unsigned long size;
 295         enum object_type type;
 296         char *buf = read_sha1_file(sha1, &type, &size);
 297         int offset = 0;
 298
 299         if (!buf)
 300                 return error("Could not read object %s", sha1_to_hex(sha1));
 301
 302         if (show_tag_object)
 303                 while (offset < size && buf[offset] != '\n') {
 304                         int new_offset = offset + 1;
 305                         while (new_offset < size && buf[new_offset++] != '\n')
 306                                 ; /* do nothing */
 307                         if (!prefixcmp(buf + offset, "tagger "))
 308                                 show_tagger(buf + offset + 7,
 309                                             new_offset - offset - 7, rev);
 310                         offset = new_offset;
 311                 }
 312
 313         if (offset < size)
 314                 fwrite(buf + offset, size - offset, 1, stdout);
 315         free(buf);
 316         return 0;
 317 }
 318
 319 static int show_tree_object(const unsigned char *sha1,
 320                 const char *base, int baselen,
 321                 const char *pathname, unsigned mode, int stage, void *context)
 322 {
 323         printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 324         return 0;
 325 }
 326
 327 int cmd_show(int argc, const char **argv, const char *prefix)
 328 {
 329         struct rev_info rev;
 330         struct object_array_entry *objects;
 331         int i, count, ret = 0;
 332
 333         git_config(git_log_config, NULL);
 334
 335         if (diff_use_color_default == -1)
 336                 diff_use_color_default = git_use_color_default;
 337
 338         init_revisions(&rev, prefix);
 339         rev.diff = 1;
 340         rev.combine_merges = 1;
 341         rev.dense_combined_merges = 1;
 342         rev.always_show_header = 1;
 343         rev.ignore_merges = 0;
 344         rev.no_walk = 1;
 345         cmd_log_init(argc, argv, prefix, &rev);
 346
 347         count = rev.pending.nr;
 348         objects = rev.pending.objects;
 349         for (i = 0; i < count && !ret; i++) {
 350                 struct object *o = objects[i].item;
 351                 const char *name = objects[i].name;
 352                 switch (o->type) {
 353                 case OBJ_BLOB:
 354                         ret = show_object(o->sha1, 0, NULL);
 355                         break;
 356                 case OBJ_TAG: {
 357                         struct tag *t = (struct tag *)o;
 358
 359                         if (rev.shown_one)
 360                                 putchar('\n');
 361                         printf("%stag %s%s\n",
 362                                         diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
 363                                         t->tag,
 364                                         diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 365                         ret = show_object(o->sha1, 1, &rev);
 366                         rev.shown_one = 1;
 367                         if (ret)
 368                                 break;
 369                         o = parse_object(t->tagged->sha1);
 370                         if (!o)
 371                                 ret = error("Could not read object %s",
 372                                             sha1_to_hex(t->tagged->sha1));
 373                         objects[i].item = o;
 374                         i--;
 375                         break;
 376                 }
 377                 case OBJ_TREE:
 378                         if (rev.shown_one)
 379                                 putchar('\n');
 380                         printf("%stree %s%s\n\n",
 381                                         diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
 382                                         name,
 383                                         diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 384                         read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 385                                         show_tree_object, NULL);
 386                         rev.shown_one = 1;
 387                         break;
 388                 case OBJ_COMMIT:
 389                         rev.pending.nr = rev.pending.alloc = 0;
 390                         rev.pending.objects = NULL;
 391                         add_object_array(o, name, &rev.pending);
 392                         ret = cmd_log_walk(&rev);
 393                         break;
 394                 default:
 395                         ret = error("Unknown type: %d", o->type);
 396                 }
 397         }
 398         free(objects);
 399         return ret;
 400 }
 401
 402 /*
 403  * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
 404  */
 405 int cmd_log_reflog(int argc, const char **argv, const char *prefix)
 406 {
 407         struct rev_info rev;
 408
 409         git_config(git_log_config, NULL);
 410
 411         if (diff_use_color_default == -1)
 412                 diff_use_color_default = git_use_color_default;
 413
 414         init_revisions(&rev, prefix);
 415         init_reflog_walk(&rev.reflog_info);
 416         rev.abbrev_commit = 1;
 417         rev.verbose_header = 1;
 418         cmd_log_init(argc, argv, prefix, &rev);
 419
 420         /*
 421          * This means that we override whatever commit format the user gave
 422          * on the cmd line.  Sad, but cmd_log_init() currently doesn't
 423          * allow us to set a different default.
 424          */
 425         rev.commit_format = CMIT_FMT_ONELINE;
 426         rev.use_terminator = 1;
 427         rev.always_show_header = 1;
 428
 429         /*
 430          * We get called through "git reflog", so unlike the other log
 431          * routines, we need to set up our pager manually..
 432          */
 433         setup_pager();
 434
 435         return cmd_log_walk(&rev);
 436 }
 437
 438 int cmd_log(int argc, const char **argv, const char *prefix)
 439 {
 440         struct rev_info rev;
 441
 442         git_config(git_log_config, NULL);
 443
 444         if (diff_use_color_default == -1)
 445                 diff_use_color_default = git_use_color_default;
 446
 447         init_revisions(&rev, prefix);
 448         rev.always_show_header = 1;
 449         cmd_log_init(argc, argv, prefix, &rev);
 450         return cmd_log_walk(&rev);
 451 }
 452
 453 /* format-patch */
 454
 455 static const char *fmt_patch_suffix = ".patch";
 456 static int numbered = 0;
 457 static int auto_number = 1;
 458
 459 static char *default_attach = NULL;
 460
 461 static struct string_list extra_hdr;
 462 static struct string_list extra_to;
 463 static struct string_list extra_cc;
 464
 465 static void add_header(const char *value)
 466 {
 467         struct string_list_item *item;
 468         int len = strlen(value);
 469         while (len && value[len - 1] == '\n')
 470                 len--;
 471
 472         if (!strncasecmp(value, "to: ", 4)) {
 473                 item = string_list_append(value + 4, &extra_to);
 474                 len -= 4;
 475         } else if (!strncasecmp(value, "cc: ", 4)) {
 476                 item = string_list_append(value + 4, &extra_cc);
 477                 len -= 4;
 478         } else {
 479                 item = string_list_append(value, &extra_hdr);
 480         }
 481
 482         item->string[len] = '\0';
 483 }
 484
 485 #define THREAD_SHALLOW 1
 486 #define THREAD_DEEP 2
 487 static int thread = 0;
 488 static int do_signoff = 0;
 489
 490 static int git_format_config(const char *var, const char *value, void *cb)
 491 {
 492         if (!strcmp(var, "format.headers")) {
 493                 if (!value)
 494                         die("format.headers without value");
 495                 add_header(value);
 496                 return 0;
 497         }
 498         if (!strcmp(var, "format.suffix"))
 499                 return git_config_string(&fmt_patch_suffix, var, value);
 500         if (!strcmp(var, "format.to")) {
 501                 if (!value)
 502                         return config_error_nonbool(var);
 503                 string_list_append(value, &extra_to);
 504                 return 0;
 505         }
 506         if (!strcmp(var, "format.cc")) {
 507                 if (!value)
 508                         return config_error_nonbool(var);
 509                 string_list_append(value, &extra_cc);
 510                 return 0;
 511         }
 512         if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 513                 return 0;
 514         }
 515         if (!strcmp(var, "format.numbered")) {
 516                 if (value && !strcasecmp(value, "auto")) {
 517                         auto_number = 1;
 518                         return 0;
 519                 }
 520                 numbered = git_config_bool(var, value);
 521                 auto_number = auto_number && numbered;
 522                 return 0;
 523         }
 524         if (!strcmp(var, "format.attach")) {
 525                 if (value && *value)
 526                         default_attach = xstrdup(value);
 527                 else
 528                         default_attach = xstrdup(git_version_string);
 529                 return 0;
 530         }
 531         if (!strcmp(var, "format.thread")) {
 532                 if (value && !strcasecmp(value, "deep")) {
 533                         thread = THREAD_DEEP;
 534                         return 0;
 535                 }
 536                 if (value && !strcasecmp(value, "shallow")) {
 537                         thread = THREAD_SHALLOW;
 538                         return 0;
 539                 }
 540                 thread = git_config_bool(var, value) && THREAD_SHALLOW;
 541                 return 0;
 542         }
 543         if (!strcmp(var, "format.signoff")) {
 544                 do_signoff = git_config_bool(var, value);
 545                 return 0;
 546         }
 547
 548         return git_log_config(var, value, cb);
 549 }
 550
 551 static FILE *realstdout = NULL;
 552 static const char *output_directory = NULL;
 553 static int outdir_offset;
 554
 555 static int reopen_stdout(struct commit *commit, struct rev_info *rev)
 556 {
 557         struct strbuf filename = STRBUF_INIT;
 558         int suffix_len = strlen(fmt_patch_suffix) + 1;
 559
 560         if (output_directory) {
 561                 strbuf_addstr(&filename, output_directory);
 562                 if (filename.len >=
 563                     PATH_MAX - FORMAT_PATCH_NAME_MAX - suffix_len)
 564                         return error("name of output directory is too long");
 565                 if (filename.buf[filename.len - 1] != '/')
 566                         strbuf_addch(&filename, '/');
 567         }
 568
 569         get_patch_filename(commit, rev->nr, fmt_patch_suffix, &filename);
 570
 571         if (!DIFF_OPT_TST(&rev->diffopt, QUICK))
 572                 fprintf(realstdout, "%s\n", filename.buf + outdir_offset);
 573
 574         if (freopen(filename.buf, "w", stdout) == NULL)
 575                 return error("Cannot open patch file %s", filename.buf);
 576
 577         strbuf_release(&filename);
 578         return 0;
 579 }
 580
 581 static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const char *prefix)
 582 {
 583         struct rev_info check_rev;
 584         struct commit *commit;
 585         struct object *o1, *o2;
 586         unsigned flags1, flags2;
 587
 588         if (rev->pending.nr != 2)
 589                 die("Need exactly one range.");
 590
 591         o1 = rev->pending.objects[0].item;
 592         flags1 = o1->flags;
 593         o2 = rev->pending.objects[1].item;
 594         flags2 = o2->flags;
 595
 596         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 597                 die("Not a range.");
 598
 599         init_patch_ids(ids);
 600
 601         /* given a range a..b get all patch ids for b..a */
 602         init_revisions(&check_rev, prefix);
 603         o1->flags ^= UNINTERESTING;
 604         o2->flags ^= UNINTERESTING;
 605         add_pending_object(&check_rev, o1, "o1");
 606         add_pending_object(&check_rev, o2, "o2");
 607         if (prepare_revision_walk(&check_rev))
 608                 die("revision walk setup failed");
 609
 610         while ((commit = get_revision(&check_rev)) != NULL) {
 611                 /* ignore merges */
 612                 if (commit->parents && commit->parents->next)
 613                         continue;
 614
 615                 add_commit_patch_id(commit, ids);
 616         }
 617
 618         /* reset for next revision walk */
 619         clear_commit_marks((struct commit *)o1,
 620                         SEEN | UNINTERESTING | SHOWN | ADDED);
 621         clear_commit_marks((struct commit *)o2,
 622                         SEEN | UNINTERESTING | SHOWN | ADDED);
 623         o1->flags = flags1;
 624         o2->flags = flags2;
 625 }
 626
 627 static void gen_message_id(struct rev_info *info, char *base)
 628 {
 629         const char *committer = git_committer_info(IDENT_WARN_ON_NO_NAME);
 630         const char *email_start = strrchr(committer, '<');
 631         const char *email_end = strrchr(committer, '>');
 632         struct strbuf buf = STRBUF_INIT;
 633         if (!email_start || !email_end || email_start > email_end - 1)
 634                 die("Could not extract email from committer identity.");
 635         strbuf_addf(&buf, "%s.%lu.git.%.*s", base,
 636                     (unsigned long) time(NULL),
 637                     (int)(email_end - email_start - 1), email_start + 1);
 638         info->message_id = strbuf_detach(&buf, NULL);
 639 }
 640
 641 static void make_cover_letter(struct rev_info *rev, int use_stdout,
 642                               int numbered, int numbered_files,
 643                               struct commit *origin,
 644                               int nr, struct commit **list, struct commit *head)
 645 {
 646         const char *committer;
 647         const char *subject_start = NULL;
 648         const char *body = "*** SUBJECT HERE ***\n\n*** BLURB HERE ***\n";
 649         const char *msg;
 650         const char *extra_headers = rev->extra_headers;
 651         struct shortlog log;
 652         struct strbuf sb = STRBUF_INIT;
 653         int i;
 654         const char *encoding = "UTF-8";
 655         struct diff_options opts;
 656         int need_8bit_cte = 0;
 657         struct commit *commit = NULL;
 658
 659         if (rev->commit_format != CMIT_FMT_EMAIL)
 660                 die("Cover letter needs email format");
 661
 662         committer = git_committer_info(0);
 663
 664         if (!numbered_files) {
 665                 /*
 666                  * We fake a commit for the cover letter so we get the filename
 667                  * desired.
 668                  */
 669                 commit = xcalloc(1, sizeof(*commit));
 670                 commit->buffer = xmalloc(400);
 671                 snprintf(commit->buffer, 400,
 672                         "tree 0000000000000000000000000000000000000000\n"
 673                         "parent %s\n"
 674                         "author %s\n"
 675                         "committer %s\n\n"
 676                         "cover letter\n",
 677                         sha1_to_hex(head->object.sha1), committer, committer);
 678         }
 679
 680         if (!use_stdout && reopen_stdout(commit, rev))
 681                 return;
 682
 683         if (commit) {
 684
 685                 free(commit->buffer);
 686                 free(commit);
 687         }
 688
 689         log_write_email_headers(rev, head, &subject_start, &extra_headers,
 690                                 &need_8bit_cte);
 691
 692         for (i = 0; !need_8bit_cte && i < nr; i++)
 693                 if (has_non_ascii(list[i]->buffer))
 694                         need_8bit_cte = 1;
 695
 696         msg = body;
 697         pp_user_info(NULL, CMIT_FMT_EMAIL, &sb, committer, DATE_RFC2822,
 698                      encoding);
 699         pp_title_line(CMIT_FMT_EMAIL, &msg, &sb, subject_start, extra_headers,
 700                       encoding, need_8bit_cte);
 701         pp_remainder(CMIT_FMT_EMAIL, &msg, &sb, 0);
 702         printf("%s\n", sb.buf);
 703
 704         strbuf_release(&sb);
 705
 706         shortlog_init(&log);
 707         log.wrap_lines = 1;
 708         log.wrap = 72;
 709         log.in1 = 2;
 710         log.in2 = 4;
 711         for (i = 0; i < nr; i++)
 712                 shortlog_add_commit(&log, list[i]);
 713
 714         shortlog_output(&log);
 715
 716         /*
 717          * We can only do diffstat with a unique reference point
 718          */
 719         if (!origin)
 720                 return;
 721
 722         memcpy(&opts, &rev->diffopt, sizeof(opts));
 723         opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
 724
 725         diff_setup_done(&opts);
 726
 727         diff_tree_sha1(origin->tree->object.sha1,
 728                        head->tree->object.sha1,
 729                        "", &opts);
 730         diffcore_std(&opts);
 731         diff_flush(&opts);
 732
 733         printf("\n");
 734 }
 735
 736 static const char *clean_message_id(const char *msg_id)
 737 {
 738         char ch;
 739         const char *a, *z, *m;
 740
 741         m = msg_id;
 742         while ((ch = *m) && (isspace(ch) || (ch == '<')))
 743                 m++;
 744         a = m;
 745         z = NULL;
 746         while ((ch = *m)) {
 747                 if (!isspace(ch) && (ch != '>'))
 748                         z = m;
 749                 m++;
 750         }
 751         if (!z)
 752                 die("insane in-reply-to: %s", msg_id);
 753         if (++z == m)
 754                 return a;
 755         return xmemdupz(a, z - a);
 756 }
 757
 758 static const char *set_outdir(const char *prefix, const char *output_directory)
 759 {
 760         if (output_directory && is_absolute_path(output_directory))
 761                 return output_directory;
 762
 763         if (!prefix || !*prefix) {
 764                 if (output_directory)
 765                         return output_directory;
 766                 /* The user did not explicitly ask for "./" */
 767                 outdir_offset = 2;
 768                 return "./";
 769         }
 770
 771         outdir_offset = strlen(prefix);
 772         if (!output_directory)
 773                 return prefix;
 774
 775         return xstrdup(prefix_filename(prefix, outdir_offset,
 776                                        output_directory));
 777 }
 778
 779 static const char * const builtin_format_patch_usage[] = {
 780         "git format-patch [options] [<since> | <revision range>]",
 781         NULL
 782 };
 783
 784 static int keep_subject = 0;
 785
 786 static int keep_callback(const struct option *opt, const char *arg, int unset)
 787 {
 788         ((struct rev_info *)opt->value)->total = -1;
 789         keep_subject = 1;
 790         return 0;
 791 }
 792
 793 static int subject_prefix = 0;
 794
 795 static int subject_prefix_callback(const struct option *opt, const char *arg,
 796                             int unset)
 797 {
 798         subject_prefix = 1;
 799         ((struct rev_info *)opt->value)->subject_prefix = arg;
 800         return 0;
 801 }
 802
 803 static int numbered_cmdline_opt = 0;
 804
 805 static int numbered_callback(const struct option *opt, const char *arg,
 806                              int unset)
 807 {
 808         *(int *)opt->value = numbered_cmdline_opt = unset ? 0 : 1;
 809         if (unset)
 810                 auto_number =  0;
 811         return 0;
 812 }
 813
 814 static int no_numbered_callback(const struct option *opt, const char *arg,
 815                                 int unset)
 816 {
 817         return numbered_callback(opt, arg, 1);
 818 }
 819
 820 static int output_directory_callback(const struct option *opt, const char *arg,
 821                               int unset)
 822 {
 823         const char **dir = (const char **)opt->value;
 824         if (*dir)
 825                 die("Two output directories?");
 826         *dir = arg;
 827         return 0;
 828 }
 829
 830 static int thread_callback(const struct option *opt, const char *arg, int unset)
 831 {
 832         int *thread = (int *)opt->value;
 833         if (unset)
 834                 *thread = 0;
 835         else if (!arg || !strcmp(arg, "shallow"))
 836                 *thread = THREAD_SHALLOW;
 837         else if (!strcmp(arg, "deep"))
 838                 *thread = THREAD_DEEP;
 839         else
 840                 return 1;
 841         return 0;
 842 }
 843
 844 static int attach_callback(const struct option *opt, const char *arg, int unset)
 845 {
 846         struct rev_info *rev = (struct rev_info *)opt->value;
 847         if (unset)
 848                 rev->mime_boundary = NULL;
 849         else if (arg)
 850                 rev->mime_boundary = arg;
 851         else
 852                 rev->mime_boundary = git_version_string;
 853         rev->no_inline = unset ? 0 : 1;
 854         return 0;
 855 }
 856
 857 static int inline_callback(const struct option *opt, const char *arg, int unset)
 858 {
 859         struct rev_info *rev = (struct rev_info *)opt->value;
 860         if (unset)
 861                 rev->mime_boundary = NULL;
 862         else if (arg)
 863                 rev->mime_boundary = arg;
 864         else
 865                 rev->mime_boundary = git_version_string;
 866         rev->no_inline = 0;
 867         return 0;
 868 }
 869
 870 static int header_callback(const struct option *opt, const char *arg, int unset)
 871 {
 872         if (unset) {
 873                 string_list_clear(&extra_hdr, 0);
 874                 string_list_clear(&extra_to, 0);
 875                 string_list_clear(&extra_cc, 0);
 876         } else {
 877             add_header(arg);
 878         }
 879         return 0;
 880 }
 881
 882 static int to_callback(const struct option *opt, const char *arg, int unset)
 883 {
 884         if (unset)
 885                 string_list_clear(&extra_to, 0);
 886         else
 887                 string_list_append(arg, &extra_to);
 888         return 0;
 889 }
 890
 891 static int cc_callback(const struct option *opt, const char *arg, int unset)
 892 {
 893         if (unset)
 894                 string_list_clear(&extra_cc, 0);
 895         else
 896                 string_list_append(arg, &extra_cc);
 897         return 0;
 898 }
 899
 900 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 901 {
 902         struct commit *commit;
 903         struct commit **list = NULL;
 904         struct rev_info rev;
 905         int nr = 0, total, i;
 906         int use_stdout = 0;
 907         int start_number = -1;
 908         int numbered_files = 0;         /* _just_ numbers */
 909         int ignore_if_in_upstream = 0;
 910         int cover_letter = 0;
 911         int boundary_count = 0;
 912         int no_binary_diff = 0;
 913         struct commit *origin = NULL, *head = NULL;
 914         const char *in_reply_to = NULL;
 915         struct patch_ids ids;
 916         char *add_signoff = NULL;
 917         struct strbuf buf = STRBUF_INIT;
 918         int use_patch_format = 0;
 919         const struct option builtin_format_patch_options[] = {
 920                 { OPTION_CALLBACK, 'n', "numbered", &numbered, NULL,
 921                             "use [PATCH n/m] even with a single patch",
 922                             PARSE_OPT_NOARG, numbered_callback },
 923                 { OPTION_CALLBACK, 'N', "no-numbered", &numbered, NULL,
 924                             "use [PATCH] even with multiple patches",
 925                             PARSE_OPT_NOARG, no_numbered_callback },
 926                 OPT_BOOLEAN('s', "signoff", &do_signoff, "add Signed-off-by:"),
 927                 OPT_BOOLEAN(0, "stdout", &use_stdout,
 928                             "print patches to standard out"),
 929                 OPT_BOOLEAN(0, "cover-letter", &cover_letter,
 930                             "generate a cover letter"),
 931                 OPT_BOOLEAN(0, "numbered-files", &numbered_files,
 932                             "use simple number sequence for output file names"),
 933                 OPT_STRING(0, "suffix", &fmt_patch_suffix, "sfx",
 934                             "use <sfx> instead of '.patch'"),
 935                 OPT_INTEGER(0, "start-number", &start_number,
 936                             "start numbering patches at <n> instead of 1"),
 937                 { OPTION_CALLBACK, 0, "subject-prefix", &rev, "prefix",
 938                             "Use [<prefix>] instead of [PATCH]",
 939                             PARSE_OPT_NONEG, subject_prefix_callback },
 940                 { OPTION_CALLBACK, 'o', "output-directory", &output_directory,
 941                             "dir", "store resulting files in <dir>",
 942                             PARSE_OPT_NONEG, output_directory_callback },
 943                 { OPTION_CALLBACK, 'k', "keep-subject", &rev, NULL,
 944                             "don't strip/add [PATCH]",
 945                             PARSE_OPT_NOARG | PARSE_OPT_NONEG, keep_callback },
 946                 OPT_BOOLEAN(0, "no-binary", &no_binary_diff,
 947                             "don't output binary diffs"),
 948                 OPT_BOOLEAN(0, "ignore-if-in-upstream", &ignore_if_in_upstream,
 949                             "don't include a patch matching a commit upstream"),
 950                 { OPTION_BOOLEAN, 'p', "no-stat", &use_patch_format, NULL,
 951                   "show patch format instead of default (patch + stat)",
 952                   PARSE_OPT_NONEG | PARSE_OPT_NOARG },
 953                 OPT_GROUP("Messaging"),
 954                 { OPTION_CALLBACK, 0, "add-header", NULL, "header",
 955                             "add email header", 0, header_callback },
 956                 { OPTION_CALLBACK, 0, "to", NULL, "email", "add To: header",
 957                             0, to_callback },
 958                 { OPTION_CALLBACK, 0, "cc", NULL, "email", "add Cc: header",
 959                             0, cc_callback },
 960                 OPT_STRING(0, "in-reply-to", &in_reply_to, "message-id",
 961                             "make first mail a reply to <message-id>"),
 962                 { OPTION_CALLBACK, 0, "attach", &rev, "boundary",
 963                             "attach the patch", PARSE_OPT_OPTARG,
 964                             attach_callback },
 965                 { OPTION_CALLBACK, 0, "inline", &rev, "boundary",
 966                             "inline the patch",
 967                             PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
 968                             inline_callback },
 969                 { OPTION_CALLBACK, 0, "thread", &thread, "style",
 970                             "enable message threading, styles: shallow, deep",
 971                             PARSE_OPT_OPTARG, thread_callback },
 972                 OPT_END()
 973         };
 974
 975         extra_hdr.strdup_strings = 1;
 976         extra_to.strdup_strings = 1;
 977         extra_cc.strdup_strings = 1;
 978         git_config(git_format_config, NULL);
 979         init_revisions(&rev, prefix);
 980         rev.commit_format = CMIT_FMT_EMAIL;
 981         rev.verbose_header = 1;
 982         rev.diff = 1;
 983         rev.combine_merges = 0;
 984         rev.ignore_merges = 1;
 985         DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 986
 987         rev.subject_prefix = fmt_patch_subject_prefix;
 988
 989         if (default_attach) {
 990                 rev.mime_boundary = default_attach;
 991                 rev.no_inline = 1;
 992         }
 993
 994         /*
 995          * Parse the arguments before setup_revisions(), or something
 996          * like "git format-patch -o a123 HEAD^.." may fail; a123 is
 997          * possibly a valid SHA1.
 998          */
 999         argc = parse_options(argc, argv, prefix, builtin_format_patch_options,
1000                              builtin_format_patch_usage,
1001                              PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN |
1002                              PARSE_OPT_KEEP_DASHDASH);
1003
1004         if (do_signoff) {
1005                 const char *committer;
1006                 const char *endpos;
1007                 committer = git_committer_info(IDENT_ERROR_ON_NO_NAME);
1008                 endpos = strchr(committer, '>');
1009                 if (!endpos)
1010                         die("bogus committer info %s", committer);
1011                 add_signoff = xmemdupz(committer, endpos - committer + 1);
1012         }
1013
1014         for (i = 0; i < extra_hdr.nr; i++) {
1015                 strbuf_addstr(&buf, extra_hdr.items[i].string);
1016                 strbuf_addch(&buf, '\n');
1017         }
1018
1019         if (extra_to.nr)
1020                 strbuf_addstr(&buf, "To: ");
1021         for (i = 0; i < extra_to.nr; i++) {
1022                 if (i)
1023                         strbuf_addstr(&buf, "    ");
1024                 strbuf_addstr(&buf, extra_to.items[i].string);
1025                 if (i + 1 < extra_to.nr)
1026                         strbuf_addch(&buf, ',');
1027                 strbuf_addch(&buf, '\n');
1028         }
1029
1030         if (extra_cc.nr)
1031                 strbuf_addstr(&buf, "Cc: ");
1032         for (i = 0; i < extra_cc.nr; i++) {
1033                 if (i)
1034                         strbuf_addstr(&buf, "    ");
1035                 strbuf_addstr(&buf, extra_cc.items[i].string);
1036                 if (i + 1 < extra_cc.nr)
1037                         strbuf_addch(&buf, ',');
1038                 strbuf_addch(&buf, '\n');
1039         }
1040
1041         rev.extra_headers = strbuf_detach(&buf, NULL);
1042
1043         if (start_number < 0)
1044                 start_number = 1;
1045
1046         /*
1047          * If numbered is set solely due to format.numbered in config,
1048          * and it would conflict with --keep-subject (-k) from the
1049          * command line, reset "numbered".
1050          */
1051         if (numbered && keep_subject && !numbered_cmdline_opt)
1052                 numbered = 0;
1053
1054         if (numbered && keep_subject)
1055                 die ("-n and -k are mutually exclusive.");
1056         if (keep_subject && subject_prefix)
1057                 die ("--subject-prefix and -k are mutually exclusive.");
1058
1059         argc = setup_revisions(argc, argv, &rev, "HEAD");
1060         if (argc > 1)
1061                 die ("unrecognized argument: %s", argv[1]);
1062
1063         if (rev.diffopt.output_format & DIFF_FORMAT_NAME)
1064                 die("--name-only does not make sense");
1065         if (rev.diffopt.output_format & DIFF_FORMAT_NAME_STATUS)
1066                 die("--name-status does not make sense");
1067         if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
1068                 die("--check does not make sense");
1069
1070         if (!use_patch_format &&
1071                 (!rev.diffopt.output_format ||
1072                  rev.diffopt.output_format == DIFF_FORMAT_PATCH))
1073                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY;
1074
1075         /* Always generate a patch */
1076         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
1077
1078         if (!DIFF_OPT_TST(&rev.diffopt, TEXT) && !no_binary_diff)
1079                 DIFF_OPT_SET(&rev.diffopt, BINARY);
1080
1081         if (!use_stdout)
1082                 output_directory = set_outdir(prefix, output_directory);
1083
1084         if (output_directory) {
1085                 if (use_stdout)
1086                         die("standard output, or directory, which one?");
1087                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
1088                         die_errno("Could not create directory '%s'",
1089                                   output_directory);
1090         }
1091
1092         if (rev.pending.nr == 1) {
1093                 if (rev.max_count < 0 && !rev.show_root_diff) {
1094                         /*
1095                          * This is traditional behaviour of "git format-patch
1096                          * origin" that prepares what the origin side still
1097                          * does not have.
1098                          */
1099                         rev.pending.objects[0].item->flags |= UNINTERESTING;
1100                         add_head_to_pending(&rev);
1101                 }
1102                 /*
1103                  * Otherwise, it is "format-patch -22 HEAD", and/or
1104                  * "format-patch --root HEAD".  The user wants
1105                  * get_revision() to do the usual traversal.
1106                  */
1107         }
1108
1109         /*
1110          * We cannot move this anywhere earlier because we do want to
1111          * know if --root was given explicitly from the command line.
1112          */
1113         rev.show_root_diff = 1;
1114
1115         if (cover_letter) {
1116                 /* remember the range */
1117                 int i;
1118                 for (i = 0; i < rev.pending.nr; i++) {
1119                         struct object *o = rev.pending.objects[i].item;
1120                         if (!(o->flags & UNINTERESTING))
1121                                 head = (struct commit *)o;
1122                 }
1123                 /* We can't generate a cover letter without any patches */
1124                 if (!head)
1125                         return 0;
1126         }
1127
1128         if (ignore_if_in_upstream)
1129                 get_patch_ids(&rev, &ids, prefix);
1130
1131         if (!use_stdout)
1132                 realstdout = xfdopen(xdup(1), "w");
1133
1134         if (prepare_revision_walk(&rev))
1135                 die("revision walk setup failed");
1136         rev.boundary = 1;
1137         while ((commit = get_revision(&rev)) != NULL) {
1138                 if (commit->object.flags & BOUNDARY) {
1139                         boundary_count++;
1140                         origin = (boundary_count == 1) ? commit : NULL;
1141                         continue;
1142                 }
1143
1144                 /* ignore merges */
1145                 if (commit->parents && commit->parents->next)
1146                         continue;
1147
1148                 if (ignore_if_in_upstream &&
1149                                 has_commit_patch_id(commit, &ids))
1150                         continue;
1151
1152                 nr++;
1153                 list = xrealloc(list, nr * sizeof(list[0]));
1154                 list[nr - 1] = commit;
1155         }
1156         total = nr;
1157         if (!keep_subject && auto_number && total > 1)
1158                 numbered = 1;
1159         if (numbered)
1160                 rev.total = total + start_number - 1;
1161         if (in_reply_to || thread || cover_letter)
1162                 rev.ref_message_ids = xcalloc(1, sizeof(struct string_list));
1163         if (in_reply_to) {
1164                 const char *msgid = clean_message_id(in_reply_to);
1165                 string_list_append(msgid, rev.ref_message_ids);
1166         }
1167         rev.numbered_files = numbered_files;
1168         rev.patch_suffix = fmt_patch_suffix;
1169         if (cover_letter) {
1170                 if (thread)
1171                         gen_message_id(&rev, "cover");
1172                 make_cover_letter(&rev, use_stdout, numbered, numbered_files,
1173                                   origin, nr, list, head);
1174                 total++;
1175                 start_number--;
1176         }
1177         rev.add_signoff = add_signoff;
1178         while (0 <= --nr) {
1179                 int shown;
1180                 commit = list[nr];
1181                 rev.nr = total - nr + (start_number - 1);
1182                 /* Make the second and subsequent mails replies to the first */
1183                 if (thread) {
1184                         /* Have we already had a message ID? */
1185                         if (rev.message_id) {
1186                                 /*
1187                                  * For deep threading: make every mail
1188                                  * a reply to the previous one, no
1189                                  * matter what other options are set.
1190                                  *
1191                                  * For shallow threading:
1192                                  *
1193                                  * Without --cover-letter and
1194                                  * --in-reply-to, make every mail a
1195                                  * reply to the one before.
1196                                  *
1197                                  * With --in-reply-to but no
1198                                  * --cover-letter, make every mail a
1199                                  * reply to the <reply-to>.
1200                                  *
1201                                  * With --cover-letter, make every
1202                                  * mail but the cover letter a reply
1203                                  * to the cover letter.  The cover
1204                                  * letter is a reply to the
1205                                  * --in-reply-to, if specified.
1206                                  */
1207                                 if (thread == THREAD_SHALLOW
1208                                     && rev.ref_message_ids->nr > 0
1209                                     && (!cover_letter || rev.nr > 1))
1210                                         free(rev.message_id);
1211                                 else
1212                                         string_list_append(rev.message_id,
1213                                                            rev.ref_message_ids);
1214                         }
1215                         gen_message_id(&rev, sha1_to_hex(commit->object.sha1));
1216                 }
1217
1218                 if (!use_stdout && reopen_stdout(numbered_files ? NULL : commit,
1219                                                  &rev))
1220                         die("Failed to create output files");
1221                 shown = log_tree_commit(&rev, commit);
1222                 free(commit->buffer);
1223                 commit->buffer = NULL;
1224
1225                 /* We put one extra blank line between formatted
1226                  * patches and this flag is used by log-tree code
1227                  * to see if it needs to emit a LF before showing
1228                  * the log; when using one file per patch, we do
1229                  * not want the extra blank line.
1230                  */
1231                 if (!use_stdout)
1232                         rev.shown_one = 0;
1233                 if (shown) {
1234                         if (rev.mime_boundary)
1235                                 printf("\n--%s%s--\n\n\n",
1236                                        mime_boundary_leader,
1237                                        rev.mime_boundary);
1238                         else
1239                                 printf("-- \n%s\n\n", git_version_string);
1240                 }
1241                 if (!use_stdout)
1242                         fclose(stdout);
1243         }
1244         free(list);
1245         string_list_clear(&extra_to, 0);
1246         string_list_clear(&extra_cc, 0);
1247         string_list_clear(&extra_hdr, 0);
1248         if (ignore_if_in_upstream)
1249                 free_patch_ids(&ids);
1250         return 0;
1251 }
1252
1253 static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
1254 {
1255         unsigned char sha1[20];
1256         if (get_sha1(arg, sha1) == 0) {
1257                 struct commit *commit = lookup_commit_reference(sha1);
1258                 if (commit) {
1259                         commit->object.flags |= flags;
1260                         add_pending_object(revs, &commit->object, arg);
1261                         return 0;
1262                 }
1263         }
1264         return -1;
1265 }
1266
1267 static const char cherry_usage[] =
1268 "git cherry [-v] [<upstream> [<head> [<limit>]]]";
1269 int cmd_cherry(int argc, const char **argv, const char *prefix)
1270 {
1271         struct rev_info revs;
1272         struct patch_ids ids;
1273         struct commit *commit;
1274         struct commit_list *list = NULL;
1275         struct branch *current_branch;
1276         const char *upstream;
1277         const char *head = "HEAD";
1278         const char *limit = NULL;
1279         int verbose = 0;
1280
1281         if (argc > 1 && !strcmp(argv[1], "-v")) {
1282                 verbose = 1;
1283                 argc--;
1284                 argv++;
1285         }
1286
1287         if (argc > 1 && !strcmp(argv[1], "-h"))
1288                 usage(cherry_usage);
1289
1290         switch (argc) {
1291         case 4:
1292                 limit = argv[3];
1293                 /* FALLTHROUGH */
1294         case 3:
1295                 head = argv[2];
1296                 /* FALLTHROUGH */
1297         case 2:
1298                 upstream = argv[1];
1299                 break;
1300         default:
1301                 current_branch = branch_get(NULL);
1302                 if (!current_branch || !current_branch->merge
1303                                         || !current_branch->merge[0]
1304                                         || !current_branch->merge[0]->dst) {
1305                         fprintf(stderr, "Could not find a tracked"
1306                                         " remote branch, please"
1307                                         " specify <upstream> manually.\n");
1308                         usage(cherry_usage);
1309                 }
1310
1311                 upstream = current_branch->merge[0]->dst;
1312         }
1313
1314         init_revisions(&revs, prefix);
1315         revs.diff = 1;
1316         revs.combine_merges = 0;
1317         revs.ignore_merges = 1;
1318         DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
1319
1320         if (add_pending_commit(head, &revs, 0))
1321                 die("Unknown commit %s", head);
1322         if (add_pending_commit(upstream, &revs, UNINTERESTING))
1323                 die("Unknown commit %s", upstream);
1324
1325         /* Don't say anything if head and upstream are the same. */
1326         if (revs.pending.nr == 2) {
1327                 struct object_array_entry *o = revs.pending.objects;
1328                 if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
1329                         return 0;
1330         }
1331
1332         get_patch_ids(&revs, &ids, prefix);
1333
1334         if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
1335                 die("Unknown commit %s", limit);
1336
1337         /* reverse the list of commits */
1338         if (prepare_revision_walk(&revs))
1339                 die("revision walk setup failed");
1340         while ((commit = get_revision(&revs)) != NULL) {
1341                 /* ignore merges */
1342                 if (commit->parents && commit->parents->next)
1343                         continue;
1344
1345                 commit_list_insert(commit, &list);
1346         }
1347
1348         while (list) {
1349                 char sign = '+';
1350
1351                 commit = list->item;
1352                 if (has_commit_patch_id(commit, &ids))
1353                         sign = '-';
1354
1355                 if (verbose) {
1356                         struct strbuf buf = STRBUF_INIT;
1357                         struct pretty_print_context ctx = {0};
1358                         pretty_print_commit(CMIT_FMT_ONELINE, commit,
1359                                             &buf, &ctx);
1360                         printf("%c %s %s\n", sign,
1361                                sha1_to_hex(commit->object.sha1), buf.buf);
1362                         strbuf_release(&buf);
1363                 }
1364                 else {
1365                         printf("%c %s\n", sign,
1366                                sha1_to_hex(commit->object.sha1));
1367                 }
1368
1369                 list = list->next;
1370         }
1371
1372         free_patch_ids(&ids);
1373         return 0;
1374 }