Andrew's git / gitweb.git / builtin-log.c
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builtin-log.con commit Documentation: pack-refs --all vs default behaviour (af67e91)
   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
  15static int default_show_root = 1;
  16
  17/* this is in builtin-diff.c */
  18void add_head(struct rev_info *revs);
  19
  20static void cmd_log_init(int argc, const char **argv, const char *prefix,
  21                      struct rev_info *rev)
  22{
  23        int i;
  24
  25        rev->abbrev = DEFAULT_ABBREV;
  26        rev->commit_format = CMIT_FMT_DEFAULT;
  27        rev->verbose_header = 1;
  28        rev->show_root_diff = default_show_root;
  29        argc = setup_revisions(argc, argv, rev, "HEAD");
  30        if (rev->diffopt.pickaxe || rev->diffopt.filter)
  31                rev->always_show_header = 0;
  32        for (i = 1; i < argc; i++) {
  33                const char *arg = argv[i];
  34                if (!strncmp(arg, "--encoding=", 11)) {
  35                        arg += 11;
  36                        if (strcmp(arg, "none"))
  37                                git_log_output_encoding = strdup(arg);
  38                        else
  39                                git_log_output_encoding = "";
  40                }
  41                else
  42                        die("unrecognized argument: %s", arg);
  43        }
  44}
  45
  46static int cmd_log_walk(struct rev_info *rev)
  47{
  48        struct commit *commit;
  49
  50        prepare_revision_walk(rev);
  51        while ((commit = get_revision(rev)) != NULL) {
  52                log_tree_commit(rev, commit);
  53                if (!rev->reflog_info) {
  54                        /* we allow cycles in reflog ancestry */
  55                        free(commit->buffer);
  56                        commit->buffer = NULL;
  57                }
  58                free_commit_list(commit->parents);
  59                commit->parents = NULL;
  60        }
  61        return 0;
  62}
  63
  64static int git_log_config(const char *var, const char *value)
  65{
  66        if (!strcmp(var, "log.showroot")) {
  67                default_show_root = git_config_bool(var, value);
  68                return 0;
  69        }
  70        return git_diff_ui_config(var, value);
  71}
  72
  73int cmd_whatchanged(int argc, const char **argv, const char *prefix)
  74{
  75        struct rev_info rev;
  76
  77        git_config(git_log_config);
  78        init_revisions(&rev, prefix);
  79        rev.diff = 1;
  80        rev.diffopt.recursive = 1;
  81        rev.simplify_history = 0;
  82        cmd_log_init(argc, argv, prefix, &rev);
  83        if (!rev.diffopt.output_format)
  84                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  85        return cmd_log_walk(&rev);
  86}
  87
  88static int show_object(const unsigned char *sha1, int suppress_header)
  89{
  90        unsigned long size;
  91        char type[20];
  92        char *buf = read_sha1_file(sha1, type, &size);
  93        int offset = 0;
  94
  95        if (!buf)
  96                return error("Could not read object %s", sha1_to_hex(sha1));
  97
  98        if (suppress_header)
  99                while (offset < size && buf[offset++] != '\n') {
 100                        int new_offset = offset;
 101                        while (new_offset < size && buf[new_offset++] != '\n')
 102                                ; /* do nothing */
 103                        offset = new_offset;
 104                }
 105
 106        if (offset < size)
 107                fwrite(buf + offset, size - offset, 1, stdout);
 108        free(buf);
 109        return 0;
 110}
 111
 112static int show_tree_object(const unsigned char *sha1,
 113                const char *base, int baselen,
 114                const char *pathname, unsigned mode, int stage)
 115{
 116        printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 117        return 0;
 118}
 119
 120int cmd_show(int argc, const char **argv, const char *prefix)
 121{
 122        struct rev_info rev;
 123        struct object_array_entry *objects;
 124        int i, count, ret = 0;
 125
 126        git_config(git_log_config);
 127        init_revisions(&rev, prefix);
 128        rev.diff = 1;
 129        rev.diffopt.recursive = 1;
 130        rev.combine_merges = 1;
 131        rev.dense_combined_merges = 1;
 132        rev.always_show_header = 1;
 133        rev.ignore_merges = 0;
 134        rev.no_walk = 1;
 135        cmd_log_init(argc, argv, prefix, &rev);
 136
 137        count = rev.pending.nr;
 138        objects = rev.pending.objects;
 139        for (i = 0; i < count && !ret; i++) {
 140                struct object *o = objects[i].item;
 141                const char *name = objects[i].name;
 142                switch (o->type) {
 143                case OBJ_BLOB:
 144                        ret = show_object(o->sha1, 0);
 145                        break;
 146                case OBJ_TAG: {
 147                        struct tag *t = (struct tag *)o;
 148
 149                        printf("%stag %s%s\n\n",
 150                                        diff_get_color(rev.diffopt.color_diff,
 151                                                DIFF_COMMIT),
 152                                        t->tag,
 153                                        diff_get_color(rev.diffopt.color_diff,
 154                                                DIFF_RESET));
 155                        ret = show_object(o->sha1, 1);
 156                        objects[i].item = (struct object *)t->tagged;
 157                        i--;
 158                        break;
 159                }
 160                case OBJ_TREE:
 161                        printf("%stree %s%s\n\n",
 162                                        diff_get_color(rev.diffopt.color_diff,
 163                                                DIFF_COMMIT),
 164                                        name,
 165                                        diff_get_color(rev.diffopt.color_diff,
 166                                                DIFF_RESET));
 167                        read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 168                                        show_tree_object);
 169                        break;
 170                case OBJ_COMMIT:
 171                        rev.pending.nr = rev.pending.alloc = 0;
 172                        rev.pending.objects = NULL;
 173                        add_object_array(o, name, &rev.pending);
 174                        ret = cmd_log_walk(&rev);
 175                        break;
 176                default:
 177                        ret = error("Unknown type: %d", o->type);
 178                }
 179        }
 180        free(objects);
 181        return ret;
 182}
 183
 184int cmd_log(int argc, const char **argv, const char *prefix)
 185{
 186        struct rev_info rev;
 187
 188        git_config(git_log_config);
 189        init_revisions(&rev, prefix);
 190        rev.always_show_header = 1;
 191        cmd_log_init(argc, argv, prefix, &rev);
 192        return cmd_log_walk(&rev);
 193}
 194
 195static int istitlechar(char c)
 196{
 197        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 198                (c >= '0' && c <= '9') || c == '.' || c == '_';
 199}
 200
 201static char *extra_headers = NULL;
 202static int extra_headers_size = 0;
 203static const char *fmt_patch_suffix = ".patch";
 204
 205static int git_format_config(const char *var, const char *value)
 206{
 207        if (!strcmp(var, "format.headers")) {
 208                int len;
 209
 210                if (!value)
 211                        die("format.headers without value");
 212                len = strlen(value);
 213                extra_headers_size += len + 1;
 214                extra_headers = xrealloc(extra_headers, extra_headers_size);
 215                extra_headers[extra_headers_size - len - 1] = 0;
 216                strcat(extra_headers, value);
 217                return 0;
 218        }
 219        if (!strcmp(var, "format.suffix")) {
 220                if (!value)
 221                        die("format.suffix without value");
 222                fmt_patch_suffix = xstrdup(value);
 223                return 0;
 224        }
 225        if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 226                return 0;
 227        }
 228        return git_log_config(var, value);
 229}
 230
 231
 232static FILE *realstdout = NULL;
 233static const char *output_directory = NULL;
 234
 235static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 236{
 237        char filename[1024];
 238        char *sol;
 239        int len = 0;
 240        int suffix_len = strlen(fmt_patch_suffix) + 10; /* ., NUL and slop */
 241
 242        if (output_directory) {
 243                strlcpy(filename, output_directory, 1000);
 244                len = strlen(filename);
 245                if (filename[len - 1] != '/')
 246                        filename[len++] = '/';
 247        }
 248
 249        sprintf(filename + len, "%04d", nr);
 250        len = strlen(filename);
 251
 252        sol = strstr(commit->buffer, "\n\n");
 253        if (sol) {
 254                int j, space = 1;
 255
 256                sol += 2;
 257                /* strip [PATCH] or [PATCH blabla] */
 258                if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 259                        char *eos = strchr(sol + 6, ']');
 260                        if (eos) {
 261                                while (isspace(*eos))
 262                                        eos++;
 263                                sol = eos;
 264                        }
 265                }
 266
 267                for (j = 0;
 268                     len < sizeof(filename) - suffix_len &&
 269                             sol[j] && sol[j] != '\n';
 270                     j++) {
 271                        if (istitlechar(sol[j])) {
 272                                if (space) {
 273                                        filename[len++] = '-';
 274                                        space = 0;
 275                                }
 276                                filename[len++] = sol[j];
 277                                if (sol[j] == '.')
 278                                        while (sol[j + 1] == '.')
 279                                                j++;
 280                        } else
 281                                space = 1;
 282                }
 283                while (filename[len - 1] == '.' || filename[len - 1] == '-')
 284                        len--;
 285        }
 286        strcpy(filename + len, fmt_patch_suffix);
 287        fprintf(realstdout, "%s\n", filename);
 288        freopen(filename, "w", stdout);
 289}
 290
 291static int get_patch_id(struct commit *commit, struct diff_options *options,
 292                unsigned char *sha1)
 293{
 294        if (commit->parents)
 295                diff_tree_sha1(commit->parents->item->object.sha1,
 296                               commit->object.sha1, "", options);
 297        else
 298                diff_root_tree_sha1(commit->object.sha1, "", options);
 299        diffcore_std(options);
 300        return diff_flush_patch_id(options, sha1);
 301}
 302
 303static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 304{
 305        struct rev_info check_rev;
 306        struct commit *commit;
 307        struct object *o1, *o2;
 308        unsigned flags1, flags2;
 309        unsigned char sha1[20];
 310
 311        if (rev->pending.nr != 2)
 312                die("Need exactly one range.");
 313
 314        o1 = rev->pending.objects[0].item;
 315        flags1 = o1->flags;
 316        o2 = rev->pending.objects[1].item;
 317        flags2 = o2->flags;
 318
 319        if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 320                die("Not a range.");
 321
 322        diff_setup(options);
 323        options->recursive = 1;
 324        if (diff_setup_done(options) < 0)
 325                die("diff_setup_done failed");
 326
 327        /* given a range a..b get all patch ids for b..a */
 328        init_revisions(&check_rev, prefix);
 329        o1->flags ^= UNINTERESTING;
 330        o2->flags ^= UNINTERESTING;
 331        add_pending_object(&check_rev, o1, "o1");
 332        add_pending_object(&check_rev, o2, "o2");
 333        prepare_revision_walk(&check_rev);
 334
 335        while ((commit = get_revision(&check_rev)) != NULL) {
 336                /* ignore merges */
 337                if (commit->parents && commit->parents->next)
 338                        continue;
 339
 340                if (!get_patch_id(commit, options, sha1))
 341                        created_object(sha1, xcalloc(1, sizeof(struct object)));
 342        }
 343
 344        /* reset for next revision walk */
 345        clear_commit_marks((struct commit *)o1,
 346                        SEEN | UNINTERESTING | SHOWN | ADDED);
 347        clear_commit_marks((struct commit *)o2,
 348                        SEEN | UNINTERESTING | SHOWN | ADDED);
 349        o1->flags = flags1;
 350        o2->flags = flags2;
 351}
 352
 353static void gen_message_id(char *dest, unsigned int length, char *base)
 354{
 355        const char *committer = git_committer_info(-1);
 356        const char *email_start = strrchr(committer, '<');
 357        const char *email_end = strrchr(committer, '>');
 358        if(!email_start || !email_end || email_start > email_end - 1)
 359                die("Could not extract email from committer identity.");
 360        snprintf(dest, length, "%s.%lu.git.%.*s", base,
 361                 (unsigned long) time(NULL),
 362                 (int)(email_end - email_start - 1), email_start + 1);
 363}
 364
 365int cmd_format_patch(int argc, const char **argv, const char *prefix)
 366{
 367        struct commit *commit;
 368        struct commit **list = NULL;
 369        struct rev_info rev;
 370        int nr = 0, total, i, j;
 371        int use_stdout = 0;
 372        int numbered = 0;
 373        int start_number = -1;
 374        int keep_subject = 0;
 375        int ignore_if_in_upstream = 0;
 376        int thread = 0;
 377        const char *in_reply_to = NULL;
 378        struct diff_options patch_id_opts;
 379        char *add_signoff = NULL;
 380        char message_id[1024];
 381        char ref_message_id[1024];
 382
 383        setup_ident();
 384        git_config(git_format_config);
 385        init_revisions(&rev, prefix);
 386        rev.commit_format = CMIT_FMT_EMAIL;
 387        rev.verbose_header = 1;
 388        rev.diff = 1;
 389        rev.combine_merges = 0;
 390        rev.ignore_merges = 1;
 391        rev.diffopt.msg_sep = "";
 392        rev.diffopt.recursive = 1;
 393
 394        rev.extra_headers = extra_headers;
 395
 396        /*
 397         * Parse the arguments before setup_revisions(), or something
 398         * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 399         * possibly a valid SHA1.
 400         */
 401        for (i = 1, j = 1; i < argc; i++) {
 402                if (!strcmp(argv[i], "--stdout"))
 403                        use_stdout = 1;
 404                else if (!strcmp(argv[i], "-n") ||
 405                                !strcmp(argv[i], "--numbered"))
 406                        numbered = 1;
 407                else if (!strncmp(argv[i], "--start-number=", 15))
 408                        start_number = strtol(argv[i] + 15, NULL, 10);
 409                else if (!strcmp(argv[i], "--start-number")) {
 410                        i++;
 411                        if (i == argc)
 412                                die("Need a number for --start-number");
 413                        start_number = strtol(argv[i], NULL, 10);
 414                }
 415                else if (!strcmp(argv[i], "-k") ||
 416                                !strcmp(argv[i], "--keep-subject")) {
 417                        keep_subject = 1;
 418                        rev.total = -1;
 419                }
 420                else if (!strcmp(argv[i], "--output-directory") ||
 421                         !strcmp(argv[i], "-o")) {
 422                        i++;
 423                        if (argc <= i)
 424                                die("Which directory?");
 425                        if (output_directory)
 426                                die("Two output directories?");
 427                        output_directory = argv[i];
 428                }
 429                else if (!strcmp(argv[i], "--signoff") ||
 430                         !strcmp(argv[i], "-s")) {
 431                        const char *committer;
 432                        const char *endpos;
 433                        committer = git_committer_info(1);
 434                        endpos = strchr(committer, '>');
 435                        if (!endpos)
 436                                die("bogos committer info %s\n", committer);
 437                        add_signoff = xmalloc(endpos - committer + 2);
 438                        memcpy(add_signoff, committer, endpos - committer + 1);
 439                        add_signoff[endpos - committer + 1] = 0;
 440                }
 441                else if (!strcmp(argv[i], "--attach"))
 442                        rev.mime_boundary = git_version_string;
 443                else if (!strncmp(argv[i], "--attach=", 9))
 444                        rev.mime_boundary = argv[i] + 9;
 445                else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 446                        ignore_if_in_upstream = 1;
 447                else if (!strcmp(argv[i], "--thread"))
 448                        thread = 1;
 449                else if (!strncmp(argv[i], "--in-reply-to=", 14))
 450                        in_reply_to = argv[i] + 14;
 451                else if (!strcmp(argv[i], "--in-reply-to")) {
 452                        i++;
 453                        if (i == argc)
 454                                die("Need a Message-Id for --in-reply-to");
 455                        in_reply_to = argv[i];
 456                }
 457                else if (!strncmp(argv[i], "--suffix=", 9))
 458                        fmt_patch_suffix = argv[i] + 9;
 459                else
 460                        argv[j++] = argv[i];
 461        }
 462        argc = j;
 463
 464        if (start_number < 0)
 465                start_number = 1;
 466        if (numbered && keep_subject)
 467                die ("-n and -k are mutually exclusive.");
 468
 469        argc = setup_revisions(argc, argv, &rev, "HEAD");
 470        if (argc > 1)
 471                die ("unrecognized argument: %s", argv[1]);
 472
 473        if (!rev.diffopt.output_format)
 474                rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH;
 475
 476        if (!rev.diffopt.text)
 477                rev.diffopt.binary = 1;
 478
 479        if (!output_directory && !use_stdout)
 480                output_directory = prefix;
 481
 482        if (output_directory) {
 483                if (use_stdout)
 484                        die("standard output, or directory, which one?");
 485                if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 486                        die("Could not create directory %s",
 487                            output_directory);
 488        }
 489
 490        if (rev.pending.nr == 1) {
 491                if (rev.max_count < 0) {
 492                        rev.pending.objects[0].item->flags |= UNINTERESTING;
 493                        add_head(&rev);
 494                }
 495                /* Otherwise, it is "format-patch -22 HEAD", and
 496                 * get_revision() would return only the specified count.
 497                 */
 498        }
 499
 500        if (ignore_if_in_upstream)
 501                get_patch_ids(&rev, &patch_id_opts, prefix);
 502
 503        if (!use_stdout)
 504                realstdout = fdopen(dup(1), "w");
 505
 506        prepare_revision_walk(&rev);
 507        while ((commit = get_revision(&rev)) != NULL) {
 508                unsigned char sha1[20];
 509
 510                /* ignore merges */
 511                if (commit->parents && commit->parents->next)
 512                        continue;
 513
 514                if (ignore_if_in_upstream &&
 515                                !get_patch_id(commit, &patch_id_opts, sha1) &&
 516                                lookup_object(sha1))
 517                        continue;
 518
 519                nr++;
 520                list = xrealloc(list, nr * sizeof(list[0]));
 521                list[nr - 1] = commit;
 522        }
 523        total = nr;
 524        if (numbered)
 525                rev.total = total + start_number - 1;
 526        rev.add_signoff = add_signoff;
 527        rev.ref_message_id = in_reply_to;
 528        while (0 <= --nr) {
 529                int shown;
 530                commit = list[nr];
 531                rev.nr = total - nr + (start_number - 1);
 532                /* Make the second and subsequent mails replies to the first */
 533                if (thread) {
 534                        if (nr == (total - 2)) {
 535                                strncpy(ref_message_id, message_id,
 536                                        sizeof(ref_message_id));
 537                                ref_message_id[sizeof(ref_message_id)-1]='\0';
 538                                rev.ref_message_id = ref_message_id;
 539                        }
 540                        gen_message_id(message_id, sizeof(message_id),
 541                                       sha1_to_hex(commit->object.sha1));
 542                        rev.message_id = message_id;
 543                }
 544                if (!use_stdout)
 545                        reopen_stdout(commit, rev.nr, keep_subject);
 546                shown = log_tree_commit(&rev, commit);
 547                free(commit->buffer);
 548                commit->buffer = NULL;
 549
 550                /* We put one extra blank line between formatted
 551                 * patches and this flag is used by log-tree code
 552                 * to see if it needs to emit a LF before showing
 553                 * the log; when using one file per patch, we do
 554                 * not want the extra blank line.
 555                 */
 556                if (!use_stdout)
 557                        rev.shown_one = 0;
 558                if (shown) {
 559                        if (rev.mime_boundary)
 560                                printf("\n--%s%s--\n\n\n",
 561                                       mime_boundary_leader,
 562                                       rev.mime_boundary);
 563                        else
 564                                printf("-- \n%s\n\n", git_version_string);
 565                }
 566                if (!use_stdout)
 567                        fclose(stdout);
 568        }
 569        free(list);
 570        return 0;
 571}
 572
 573static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 574{
 575        unsigned char sha1[20];
 576        if (get_sha1(arg, sha1) == 0) {
 577                struct commit *commit = lookup_commit_reference(sha1);
 578                if (commit) {
 579                        commit->object.flags |= flags;
 580                        add_pending_object(revs, &commit->object, arg);
 581                        return 0;
 582                }
 583        }
 584        return -1;
 585}
 586
 587static const char cherry_usage[] =
 588"git-cherry [-v] <upstream> [<head>] [<limit>]";
 589int cmd_cherry(int argc, const char **argv, const char *prefix)
 590{
 591        struct rev_info revs;
 592        struct diff_options patch_id_opts;
 593        struct commit *commit;
 594        struct commit_list *list = NULL;
 595        const char *upstream;
 596        const char *head = "HEAD";
 597        const char *limit = NULL;
 598        int verbose = 0;
 599
 600        if (argc > 1 && !strcmp(argv[1], "-v")) {
 601                verbose = 1;
 602                argc--;
 603                argv++;
 604        }
 605
 606        switch (argc) {
 607        case 4:
 608                limit = argv[3];
 609                /* FALLTHROUGH */
 610        case 3:
 611                head = argv[2];
 612                /* FALLTHROUGH */
 613        case 2:
 614                upstream = argv[1];
 615                break;
 616        default:
 617                usage(cherry_usage);
 618        }
 619
 620        init_revisions(&revs, prefix);
 621        revs.diff = 1;
 622        revs.combine_merges = 0;
 623        revs.ignore_merges = 1;
 624        revs.diffopt.recursive = 1;
 625
 626        if (add_pending_commit(head, &revs, 0))
 627                die("Unknown commit %s", head);
 628        if (add_pending_commit(upstream, &revs, UNINTERESTING))
 629                die("Unknown commit %s", upstream);
 630
 631        /* Don't say anything if head and upstream are the same. */
 632        if (revs.pending.nr == 2) {
 633                struct object_array_entry *o = revs.pending.objects;
 634                if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 635                        return 0;
 636        }
 637
 638        get_patch_ids(&revs, &patch_id_opts, prefix);
 639
 640        if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 641                die("Unknown commit %s", limit);
 642
 643        /* reverse the list of commits */
 644        prepare_revision_walk(&revs);
 645        while ((commit = get_revision(&revs)) != NULL) {
 646                /* ignore merges */
 647                if (commit->parents && commit->parents->next)
 648                        continue;
 649
 650                commit_list_insert(commit, &list);
 651        }
 652
 653        while (list) {
 654                unsigned char sha1[20];
 655                char sign = '+';
 656
 657                commit = list->item;
 658                if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 659                    lookup_object(sha1))
 660                        sign = '-';
 661
 662                if (verbose) {
 663                        static char buf[16384];
 664                        pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 665                                            buf, sizeof(buf), 0, NULL, NULL, 0);
 666                        printf("%c %s %s\n", sign,
 667                               sha1_to_hex(commit->object.sha1), buf);
 668                }
 669                else {
 670                        printf("%c %s\n", sign,
 671                               sha1_to_hex(commit->object.sha1));
 672                }
 673
 674                list = list->next;
 675        }
 676
 677        return 0;
 678}