Andrew's git / gitweb.git / builtin-log.c
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builtin-log.con commit Teach 'diff' about 'diff' attribute. (8c70124)
   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 "commit.h"
   9#include "diff.h"
  10#include "revision.h"
  11#include "log-tree.h"
  12#include "builtin.h"
  13#include "tag.h"
  14#include "reflog-walk.h"
  15#include "patch-ids.h"
  16
  17static int default_show_root = 1;
  18
  19/* this is in builtin-diff.c */
  20void add_head(struct rev_info *revs);
  21
  22static void cmd_log_init(int argc, const char **argv, const char *prefix,
  23                      struct rev_info *rev)
  24{
  25        int i;
  26
  27        rev->abbrev = DEFAULT_ABBREV;
  28        rev->commit_format = CMIT_FMT_DEFAULT;
  29        rev->verbose_header = 1;
  30        rev->show_root_diff = default_show_root;
  31        argc = setup_revisions(argc, argv, rev, "HEAD");
  32        if (rev->diffopt.pickaxe || rev->diffopt.filter)
  33                rev->always_show_header = 0;
  34        for (i = 1; i < argc; i++) {
  35                const char *arg = argv[i];
  36                if (!prefixcmp(arg, "--encoding=")) {
  37                        arg += 11;
  38                        if (strcmp(arg, "none"))
  39                                git_log_output_encoding = xstrdup(arg);
  40                        else
  41                                git_log_output_encoding = "";
  42                }
  43                else
  44                        die("unrecognized argument: %s", arg);
  45        }
  46}
  47
  48static int cmd_log_walk(struct rev_info *rev)
  49{
  50        struct commit *commit;
  51
  52        prepare_revision_walk(rev);
  53        while ((commit = get_revision(rev)) != NULL) {
  54                log_tree_commit(rev, commit);
  55                if (!rev->reflog_info) {
  56                        /* we allow cycles in reflog ancestry */
  57                        free(commit->buffer);
  58                        commit->buffer = NULL;
  59                }
  60                free_commit_list(commit->parents);
  61                commit->parents = NULL;
  62        }
  63        return 0;
  64}
  65
  66static int git_log_config(const char *var, const char *value)
  67{
  68        if (!strcmp(var, "log.showroot")) {
  69                default_show_root = git_config_bool(var, value);
  70                return 0;
  71        }
  72        return git_diff_ui_config(var, value);
  73}
  74
  75int cmd_whatchanged(int argc, const char **argv, const char *prefix)
  76{
  77        struct rev_info rev;
  78
  79        git_config(git_log_config);
  80        init_revisions(&rev, prefix);
  81        rev.diff = 1;
  82        rev.diffopt.recursive = 1;
  83        rev.simplify_history = 0;
  84        cmd_log_init(argc, argv, prefix, &rev);
  85        if (!rev.diffopt.output_format)
  86                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  87        return cmd_log_walk(&rev);
  88}
  89
  90static int show_object(const unsigned char *sha1, int suppress_header)
  91{
  92        unsigned long size;
  93        enum object_type type;
  94        char *buf = read_sha1_file(sha1, &type, &size);
  95        int offset = 0;
  96
  97        if (!buf)
  98                return error("Could not read object %s", sha1_to_hex(sha1));
  99
 100        if (suppress_header)
 101                while (offset < size && buf[offset++] != '\n') {
 102                        int new_offset = offset;
 103                        while (new_offset < size && buf[new_offset++] != '\n')
 104                                ; /* do nothing */
 105                        offset = new_offset;
 106                }
 107
 108        if (offset < size)
 109                fwrite(buf + offset, size - offset, 1, stdout);
 110        free(buf);
 111        return 0;
 112}
 113
 114static int show_tree_object(const unsigned char *sha1,
 115                const char *base, int baselen,
 116                const char *pathname, unsigned mode, int stage)
 117{
 118        printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 119        return 0;
 120}
 121
 122int cmd_show(int argc, const char **argv, const char *prefix)
 123{
 124        struct rev_info rev;
 125        struct object_array_entry *objects;
 126        int i, count, ret = 0;
 127
 128        git_config(git_log_config);
 129        init_revisions(&rev, prefix);
 130        rev.diff = 1;
 131        rev.diffopt.recursive = 1;
 132        rev.combine_merges = 1;
 133        rev.dense_combined_merges = 1;
 134        rev.always_show_header = 1;
 135        rev.ignore_merges = 0;
 136        rev.no_walk = 1;
 137        cmd_log_init(argc, argv, prefix, &rev);
 138
 139        count = rev.pending.nr;
 140        objects = rev.pending.objects;
 141        for (i = 0; i < count && !ret; i++) {
 142                struct object *o = objects[i].item;
 143                const char *name = objects[i].name;
 144                switch (o->type) {
 145                case OBJ_BLOB:
 146                        ret = show_object(o->sha1, 0);
 147                        break;
 148                case OBJ_TAG: {
 149                        struct tag *t = (struct tag *)o;
 150
 151                        printf("%stag %s%s\n\n",
 152                                        diff_get_color(rev.diffopt.color_diff,
 153                                                DIFF_COMMIT),
 154                                        t->tag,
 155                                        diff_get_color(rev.diffopt.color_diff,
 156                                                DIFF_RESET));
 157                        ret = show_object(o->sha1, 1);
 158                        objects[i].item = (struct object *)t->tagged;
 159                        i--;
 160                        break;
 161                }
 162                case OBJ_TREE:
 163                        printf("%stree %s%s\n\n",
 164                                        diff_get_color(rev.diffopt.color_diff,
 165                                                DIFF_COMMIT),
 166                                        name,
 167                                        diff_get_color(rev.diffopt.color_diff,
 168                                                DIFF_RESET));
 169                        read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 170                                        show_tree_object);
 171                        break;
 172                case OBJ_COMMIT:
 173                        rev.pending.nr = rev.pending.alloc = 0;
 174                        rev.pending.objects = NULL;
 175                        add_object_array(o, name, &rev.pending);
 176                        ret = cmd_log_walk(&rev);
 177                        break;
 178                default:
 179                        ret = error("Unknown type: %d", o->type);
 180                }
 181        }
 182        free(objects);
 183        return ret;
 184}
 185
 186/*
 187 * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
 188 */
 189int cmd_log_reflog(int argc, const char **argv, const char *prefix)
 190{
 191        struct rev_info rev;
 192
 193        git_config(git_log_config);
 194        init_revisions(&rev, prefix);
 195        init_reflog_walk(&rev.reflog_info);
 196        rev.abbrev_commit = 1;
 197        rev.verbose_header = 1;
 198        cmd_log_init(argc, argv, prefix, &rev);
 199
 200        /*
 201         * This means that we override whatever commit format the user gave
 202         * on the cmd line.  Sad, but cmd_log_init() currently doesn't
 203         * allow us to set a different default.
 204         */
 205        rev.commit_format = CMIT_FMT_ONELINE;
 206        rev.always_show_header = 1;
 207
 208        /*
 209         * We get called through "git reflog", so unlike the other log
 210         * routines, we need to set up our pager manually..
 211         */
 212        setup_pager();
 213
 214        return cmd_log_walk(&rev);
 215}
 216
 217int cmd_log(int argc, const char **argv, const char *prefix)
 218{
 219        struct rev_info rev;
 220
 221        git_config(git_log_config);
 222        init_revisions(&rev, prefix);
 223        rev.always_show_header = 1;
 224        cmd_log_init(argc, argv, prefix, &rev);
 225        return cmd_log_walk(&rev);
 226}
 227
 228/* format-patch */
 229#define FORMAT_PATCH_NAME_MAX 64
 230
 231static int istitlechar(char c)
 232{
 233        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 234                (c >= '0' && c <= '9') || c == '.' || c == '_';
 235}
 236
 237static char *extra_headers = NULL;
 238static int extra_headers_size = 0;
 239static const char *fmt_patch_suffix = ".patch";
 240
 241static int git_format_config(const char *var, const char *value)
 242{
 243        if (!strcmp(var, "format.headers")) {
 244                int len;
 245
 246                if (!value)
 247                        die("format.headers without value");
 248                len = strlen(value);
 249                extra_headers_size += len + 1;
 250                extra_headers = xrealloc(extra_headers, extra_headers_size);
 251                extra_headers[extra_headers_size - len - 1] = 0;
 252                strcat(extra_headers, value);
 253                return 0;
 254        }
 255        if (!strcmp(var, "format.suffix")) {
 256                if (!value)
 257                        die("format.suffix without value");
 258                fmt_patch_suffix = xstrdup(value);
 259                return 0;
 260        }
 261        if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 262                return 0;
 263        }
 264        return git_log_config(var, value);
 265}
 266
 267
 268static FILE *realstdout = NULL;
 269static const char *output_directory = NULL;
 270
 271static int reopen_stdout(struct commit *commit, int nr, int keep_subject)
 272{
 273        char filename[PATH_MAX];
 274        char *sol;
 275        int len = 0;
 276        int suffix_len = strlen(fmt_patch_suffix) + 1;
 277
 278        if (output_directory) {
 279                if (strlen(output_directory) >=
 280                    sizeof(filename) - FORMAT_PATCH_NAME_MAX - suffix_len)
 281                        return error("name of output directory is too long");
 282                strlcpy(filename, output_directory, sizeof(filename) - suffix_len);
 283                len = strlen(filename);
 284                if (filename[len - 1] != '/')
 285                        filename[len++] = '/';
 286        }
 287
 288        sprintf(filename + len, "%04d", nr);
 289        len = strlen(filename);
 290
 291        sol = strstr(commit->buffer, "\n\n");
 292        if (sol) {
 293                int j, space = 1;
 294
 295                sol += 2;
 296                /* strip [PATCH] or [PATCH blabla] */
 297                if (!keep_subject && !prefixcmp(sol, "[PATCH")) {
 298                        char *eos = strchr(sol + 6, ']');
 299                        if (eos) {
 300                                while (isspace(*eos))
 301                                        eos++;
 302                                sol = eos;
 303                        }
 304                }
 305
 306                for (j = 0;
 307                     j < FORMAT_PATCH_NAME_MAX - suffix_len - 5 &&
 308                             len < sizeof(filename) - suffix_len &&
 309                             sol[j] && sol[j] != '\n';
 310                     j++) {
 311                        if (istitlechar(sol[j])) {
 312                                if (space) {
 313                                        filename[len++] = '-';
 314                                        space = 0;
 315                                }
 316                                filename[len++] = sol[j];
 317                                if (sol[j] == '.')
 318                                        while (sol[j + 1] == '.')
 319                                                j++;
 320                        } else
 321                                space = 1;
 322                }
 323                while (filename[len - 1] == '.' || filename[len - 1] == '-')
 324                        len--;
 325                filename[len] = 0;
 326        }
 327        if (len + suffix_len >= sizeof(filename))
 328                return error("Patch pathname too long");
 329        strcpy(filename + len, fmt_patch_suffix);
 330        fprintf(realstdout, "%s\n", filename);
 331        if (freopen(filename, "w", stdout) == NULL)
 332                return error("Cannot open patch file %s",filename);
 333        return 0;
 334
 335}
 336
 337static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const char *prefix)
 338{
 339        struct rev_info check_rev;
 340        struct commit *commit;
 341        struct object *o1, *o2;
 342        unsigned flags1, flags2;
 343
 344        if (rev->pending.nr != 2)
 345                die("Need exactly one range.");
 346
 347        o1 = rev->pending.objects[0].item;
 348        flags1 = o1->flags;
 349        o2 = rev->pending.objects[1].item;
 350        flags2 = o2->flags;
 351
 352        if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 353                die("Not a range.");
 354
 355        init_patch_ids(ids);
 356
 357        /* given a range a..b get all patch ids for b..a */
 358        init_revisions(&check_rev, prefix);
 359        o1->flags ^= UNINTERESTING;
 360        o2->flags ^= UNINTERESTING;
 361        add_pending_object(&check_rev, o1, "o1");
 362        add_pending_object(&check_rev, o2, "o2");
 363        prepare_revision_walk(&check_rev);
 364
 365        while ((commit = get_revision(&check_rev)) != NULL) {
 366                /* ignore merges */
 367                if (commit->parents && commit->parents->next)
 368                        continue;
 369
 370                add_commit_patch_id(commit, ids);
 371        }
 372
 373        /* reset for next revision walk */
 374        clear_commit_marks((struct commit *)o1,
 375                        SEEN | UNINTERESTING | SHOWN | ADDED);
 376        clear_commit_marks((struct commit *)o2,
 377                        SEEN | UNINTERESTING | SHOWN | ADDED);
 378        o1->flags = flags1;
 379        o2->flags = flags2;
 380}
 381
 382static void gen_message_id(char *dest, unsigned int length, char *base)
 383{
 384        const char *committer = git_committer_info(-1);
 385        const char *email_start = strrchr(committer, '<');
 386        const char *email_end = strrchr(committer, '>');
 387        if(!email_start || !email_end || email_start > email_end - 1)
 388                die("Could not extract email from committer identity.");
 389        snprintf(dest, length, "%s.%lu.git.%.*s", base,
 390                 (unsigned long) time(NULL),
 391                 (int)(email_end - email_start - 1), email_start + 1);
 392}
 393
 394int cmd_format_patch(int argc, const char **argv, const char *prefix)
 395{
 396        struct commit *commit;
 397        struct commit **list = NULL;
 398        struct rev_info rev;
 399        int nr = 0, total, i, j;
 400        int use_stdout = 0;
 401        int numbered = 0;
 402        int start_number = -1;
 403        int keep_subject = 0;
 404        int subject_prefix = 0;
 405        int ignore_if_in_upstream = 0;
 406        int thread = 0;
 407        const char *in_reply_to = NULL;
 408        struct patch_ids ids;
 409        char *add_signoff = NULL;
 410        char message_id[1024];
 411        char ref_message_id[1024];
 412
 413        git_config(git_format_config);
 414        init_revisions(&rev, prefix);
 415        rev.commit_format = CMIT_FMT_EMAIL;
 416        rev.verbose_header = 1;
 417        rev.diff = 1;
 418        rev.combine_merges = 0;
 419        rev.ignore_merges = 1;
 420        rev.diffopt.msg_sep = "";
 421        rev.diffopt.recursive = 1;
 422
 423        rev.extra_headers = extra_headers;
 424
 425        /*
 426         * Parse the arguments before setup_revisions(), or something
 427         * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 428         * possibly a valid SHA1.
 429         */
 430        for (i = 1, j = 1; i < argc; i++) {
 431                if (!strcmp(argv[i], "--stdout"))
 432                        use_stdout = 1;
 433                else if (!strcmp(argv[i], "-n") ||
 434                                !strcmp(argv[i], "--numbered"))
 435                        numbered = 1;
 436                else if (!prefixcmp(argv[i], "--start-number="))
 437                        start_number = strtol(argv[i] + 15, NULL, 10);
 438                else if (!strcmp(argv[i], "--start-number")) {
 439                        i++;
 440                        if (i == argc)
 441                                die("Need a number for --start-number");
 442                        start_number = strtol(argv[i], NULL, 10);
 443                }
 444                else if (!strcmp(argv[i], "-k") ||
 445                                !strcmp(argv[i], "--keep-subject")) {
 446                        keep_subject = 1;
 447                        rev.total = -1;
 448                }
 449                else if (!strcmp(argv[i], "--output-directory") ||
 450                         !strcmp(argv[i], "-o")) {
 451                        i++;
 452                        if (argc <= i)
 453                                die("Which directory?");
 454                        if (output_directory)
 455                                die("Two output directories?");
 456                        output_directory = argv[i];
 457                }
 458                else if (!strcmp(argv[i], "--signoff") ||
 459                         !strcmp(argv[i], "-s")) {
 460                        const char *committer;
 461                        const char *endpos;
 462                        committer = git_committer_info(1);
 463                        endpos = strchr(committer, '>');
 464                        if (!endpos)
 465                                die("bogos committer info %s\n", committer);
 466                        add_signoff = xmalloc(endpos - committer + 2);
 467                        memcpy(add_signoff, committer, endpos - committer + 1);
 468                        add_signoff[endpos - committer + 1] = 0;
 469                }
 470                else if (!strcmp(argv[i], "--attach")) {
 471                        rev.mime_boundary = git_version_string;
 472                        rev.no_inline = 1;
 473                }
 474                else if (!prefixcmp(argv[i], "--attach=")) {
 475                        rev.mime_boundary = argv[i] + 9;
 476                        rev.no_inline = 1;
 477                }
 478                else if (!strcmp(argv[i], "--inline")) {
 479                        rev.mime_boundary = git_version_string;
 480                        rev.no_inline = 0;
 481                }
 482                else if (!prefixcmp(argv[i], "--inline=")) {
 483                        rev.mime_boundary = argv[i] + 9;
 484                        rev.no_inline = 0;
 485                }
 486                else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 487                        ignore_if_in_upstream = 1;
 488                else if (!strcmp(argv[i], "--thread"))
 489                        thread = 1;
 490                else if (!prefixcmp(argv[i], "--in-reply-to="))
 491                        in_reply_to = argv[i] + 14;
 492                else if (!strcmp(argv[i], "--in-reply-to")) {
 493                        i++;
 494                        if (i == argc)
 495                                die("Need a Message-Id for --in-reply-to");
 496                        in_reply_to = argv[i];
 497                } else if (!prefixcmp(argv[i], "--subject-prefix=")) {
 498                        subject_prefix = 1;
 499                        rev.subject_prefix = argv[i] + 17;
 500                } else if (!prefixcmp(argv[i], "--suffix="))
 501                        fmt_patch_suffix = argv[i] + 9;
 502                else
 503                        argv[j++] = argv[i];
 504        }
 505        argc = j;
 506
 507        if (start_number < 0)
 508                start_number = 1;
 509        if (numbered && keep_subject)
 510                die ("-n and -k are mutually exclusive.");
 511        if (keep_subject && subject_prefix)
 512                die ("--subject-prefix and -k are mutually exclusive.");
 513
 514        argc = setup_revisions(argc, argv, &rev, "HEAD");
 515        if (argc > 1)
 516                die ("unrecognized argument: %s", argv[1]);
 517
 518        if (!rev.diffopt.output_format)
 519                rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH;
 520
 521        if (!rev.diffopt.text)
 522                rev.diffopt.binary = 1;
 523
 524        if (!output_directory && !use_stdout)
 525                output_directory = prefix;
 526
 527        if (output_directory) {
 528                if (use_stdout)
 529                        die("standard output, or directory, which one?");
 530                if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 531                        die("Could not create directory %s",
 532                            output_directory);
 533        }
 534
 535        if (rev.pending.nr == 1) {
 536                if (rev.max_count < 0) {
 537                        rev.pending.objects[0].item->flags |= UNINTERESTING;
 538                        add_head(&rev);
 539                }
 540                /* Otherwise, it is "format-patch -22 HEAD", and
 541                 * get_revision() would return only the specified count.
 542                 */
 543        }
 544
 545        if (ignore_if_in_upstream)
 546                get_patch_ids(&rev, &ids, prefix);
 547
 548        if (!use_stdout)
 549                realstdout = fdopen(dup(1), "w");
 550
 551        prepare_revision_walk(&rev);
 552        while ((commit = get_revision(&rev)) != NULL) {
 553                /* ignore merges */
 554                if (commit->parents && commit->parents->next)
 555                        continue;
 556
 557                if (ignore_if_in_upstream &&
 558                                has_commit_patch_id(commit, &ids))
 559                        continue;
 560
 561                nr++;
 562                list = xrealloc(list, nr * sizeof(list[0]));
 563                list[nr - 1] = commit;
 564        }
 565        total = nr;
 566        if (numbered)
 567                rev.total = total + start_number - 1;
 568        rev.add_signoff = add_signoff;
 569        rev.ref_message_id = in_reply_to;
 570        while (0 <= --nr) {
 571                int shown;
 572                commit = list[nr];
 573                rev.nr = total - nr + (start_number - 1);
 574                /* Make the second and subsequent mails replies to the first */
 575                if (thread) {
 576                        if (nr == (total - 2)) {
 577                                strncpy(ref_message_id, message_id,
 578                                        sizeof(ref_message_id));
 579                                ref_message_id[sizeof(ref_message_id)-1]='\0';
 580                                rev.ref_message_id = ref_message_id;
 581                        }
 582                        gen_message_id(message_id, sizeof(message_id),
 583                                       sha1_to_hex(commit->object.sha1));
 584                        rev.message_id = message_id;
 585                }
 586                if (!use_stdout)
 587                        if (reopen_stdout(commit, rev.nr, keep_subject))
 588                                die("Failed to create output files");
 589                shown = log_tree_commit(&rev, commit);
 590                free(commit->buffer);
 591                commit->buffer = NULL;
 592
 593                /* We put one extra blank line between formatted
 594                 * patches and this flag is used by log-tree code
 595                 * to see if it needs to emit a LF before showing
 596                 * the log; when using one file per patch, we do
 597                 * not want the extra blank line.
 598                 */
 599                if (!use_stdout)
 600                        rev.shown_one = 0;
 601                if (shown) {
 602                        if (rev.mime_boundary)
 603                                printf("\n--%s%s--\n\n\n",
 604                                       mime_boundary_leader,
 605                                       rev.mime_boundary);
 606                        else
 607                                printf("-- \n%s\n\n", git_version_string);
 608                }
 609                if (!use_stdout)
 610                        fclose(stdout);
 611        }
 612        free(list);
 613        if (ignore_if_in_upstream)
 614                free_patch_ids(&ids);
 615        return 0;
 616}
 617
 618static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 619{
 620        unsigned char sha1[20];
 621        if (get_sha1(arg, sha1) == 0) {
 622                struct commit *commit = lookup_commit_reference(sha1);
 623                if (commit) {
 624                        commit->object.flags |= flags;
 625                        add_pending_object(revs, &commit->object, arg);
 626                        return 0;
 627                }
 628        }
 629        return -1;
 630}
 631
 632static const char cherry_usage[] =
 633"git-cherry [-v] <upstream> [<head>] [<limit>]";
 634int cmd_cherry(int argc, const char **argv, const char *prefix)
 635{
 636        struct rev_info revs;
 637        struct patch_ids ids;
 638        struct commit *commit;
 639        struct commit_list *list = NULL;
 640        const char *upstream;
 641        const char *head = "HEAD";
 642        const char *limit = NULL;
 643        int verbose = 0;
 644
 645        if (argc > 1 && !strcmp(argv[1], "-v")) {
 646                verbose = 1;
 647                argc--;
 648                argv++;
 649        }
 650
 651        switch (argc) {
 652        case 4:
 653                limit = argv[3];
 654                /* FALLTHROUGH */
 655        case 3:
 656                head = argv[2];
 657                /* FALLTHROUGH */
 658        case 2:
 659                upstream = argv[1];
 660                break;
 661        default:
 662                usage(cherry_usage);
 663        }
 664
 665        init_revisions(&revs, prefix);
 666        revs.diff = 1;
 667        revs.combine_merges = 0;
 668        revs.ignore_merges = 1;
 669        revs.diffopt.recursive = 1;
 670
 671        if (add_pending_commit(head, &revs, 0))
 672                die("Unknown commit %s", head);
 673        if (add_pending_commit(upstream, &revs, UNINTERESTING))
 674                die("Unknown commit %s", upstream);
 675
 676        /* Don't say anything if head and upstream are the same. */
 677        if (revs.pending.nr == 2) {
 678                struct object_array_entry *o = revs.pending.objects;
 679                if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 680                        return 0;
 681        }
 682
 683        get_patch_ids(&revs, &ids, prefix);
 684
 685        if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 686                die("Unknown commit %s", limit);
 687
 688        /* reverse the list of commits */
 689        prepare_revision_walk(&revs);
 690        while ((commit = get_revision(&revs)) != NULL) {
 691                /* ignore merges */
 692                if (commit->parents && commit->parents->next)
 693                        continue;
 694
 695                commit_list_insert(commit, &list);
 696        }
 697
 698        while (list) {
 699                char sign = '+';
 700
 701                commit = list->item;
 702                if (has_commit_patch_id(commit, &ids))
 703                        sign = '-';
 704
 705                if (verbose) {
 706                        static char buf[16384];
 707                        pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 708                                            buf, sizeof(buf), 0, NULL, NULL, 0);
 709                        printf("%c %s %s\n", sign,
 710                               sha1_to_hex(commit->object.sha1), buf);
 711                }
 712                else {
 713                        printf("%c %s\n", sign,
 714                               sha1_to_hex(commit->object.sha1));
 715                }
 716
 717                list = list->next;
 718        }
 719
 720        free_patch_ids(&ids);
 721        return 0;
 722}