Andrew's git / gitweb.git / builtin-log.c
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builtin-log.con commit git-svn: pass an unambiguous ref to rev-list when grafting-branches (9a5e407)
   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                free(commit->buffer);
  54                commit->buffer = NULL;
  55                free_commit_list(commit->parents);
  56                commit->parents = NULL;
  57        }
  58        return 0;
  59}
  60
  61static int git_log_config(const char *var, const char *value)
  62{
  63        if (!strcmp(var, "log.showroot")) {
  64                default_show_root = git_config_bool(var, value);
  65                return 0;
  66        }
  67        return git_diff_ui_config(var, value);
  68}
  69
  70int cmd_whatchanged(int argc, const char **argv, const char *prefix)
  71{
  72        struct rev_info rev;
  73
  74        git_config(git_log_config);
  75        init_revisions(&rev, prefix);
  76        rev.diff = 1;
  77        rev.diffopt.recursive = 1;
  78        rev.simplify_history = 0;
  79        cmd_log_init(argc, argv, prefix, &rev);
  80        if (!rev.diffopt.output_format)
  81                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  82        return cmd_log_walk(&rev);
  83}
  84
  85static int show_object(const unsigned char *sha1, int suppress_header)
  86{
  87        unsigned long size;
  88        char type[20];
  89        char *buf = read_sha1_file(sha1, type, &size);
  90        int offset = 0;
  91
  92        if (!buf)
  93                return error("Could not read object %s", sha1_to_hex(sha1));
  94
  95        if (suppress_header)
  96                while (offset < size && buf[offset++] != '\n') {
  97                        int new_offset = offset;
  98                        while (new_offset < size && buf[new_offset++] != '\n')
  99                                ; /* do nothing */
 100                        offset = new_offset;
 101                }
 102
 103        if (offset < size)
 104                fwrite(buf + offset, size - offset, 1, stdout);
 105        free(buf);
 106        return 0;
 107}
 108
 109static int show_tree_object(const unsigned char *sha1,
 110                const char *base, int baselen,
 111                const char *pathname, unsigned mode, int stage)
 112{
 113        printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 114        return 0;
 115}
 116
 117int cmd_show(int argc, const char **argv, const char *prefix)
 118{
 119        struct rev_info rev;
 120        struct object_array_entry *objects;
 121        int i, count, ret = 0;
 122
 123        git_config(git_log_config);
 124        init_revisions(&rev, prefix);
 125        rev.diff = 1;
 126        rev.diffopt.recursive = 1;
 127        rev.combine_merges = 1;
 128        rev.dense_combined_merges = 1;
 129        rev.always_show_header = 1;
 130        rev.ignore_merges = 0;
 131        rev.no_walk = 1;
 132        cmd_log_init(argc, argv, prefix, &rev);
 133
 134        count = rev.pending.nr;
 135        objects = rev.pending.objects;
 136        for (i = 0; i < count && !ret; i++) {
 137                struct object *o = objects[i].item;
 138                const char *name = objects[i].name;
 139                switch (o->type) {
 140                case OBJ_BLOB:
 141                        ret = show_object(o->sha1, 0);
 142                        break;
 143                case OBJ_TAG: {
 144                        struct tag *t = (struct tag *)o;
 145
 146                        printf("%stag %s%s\n\n",
 147                                        diff_get_color(rev.diffopt.color_diff,
 148                                                DIFF_COMMIT),
 149                                        t->tag,
 150                                        diff_get_color(rev.diffopt.color_diff,
 151                                                DIFF_RESET));
 152                        ret = show_object(o->sha1, 1);
 153                        objects[i].item = (struct object *)t->tagged;
 154                        i--;
 155                        break;
 156                }
 157                case OBJ_TREE:
 158                        printf("%stree %s%s\n\n",
 159                                        diff_get_color(rev.diffopt.color_diff,
 160                                                DIFF_COMMIT),
 161                                        name,
 162                                        diff_get_color(rev.diffopt.color_diff,
 163                                                DIFF_RESET));
 164                        read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 165                                        show_tree_object);
 166                        break;
 167                case OBJ_COMMIT:
 168                        rev.pending.nr = rev.pending.alloc = 0;
 169                        rev.pending.objects = NULL;
 170                        add_object_array(o, name, &rev.pending);
 171                        ret = cmd_log_walk(&rev);
 172                        break;
 173                default:
 174                        ret = error("Unknown type: %d", o->type);
 175                }
 176        }
 177        free(objects);
 178        return ret;
 179}
 180
 181int cmd_log(int argc, const char **argv, const char *prefix)
 182{
 183        struct rev_info rev;
 184
 185        git_config(git_log_config);
 186        init_revisions(&rev, prefix);
 187        rev.always_show_header = 1;
 188        cmd_log_init(argc, argv, prefix, &rev);
 189        return cmd_log_walk(&rev);
 190}
 191
 192static int istitlechar(char c)
 193{
 194        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 195                (c >= '0' && c <= '9') || c == '.' || c == '_';
 196}
 197
 198static char *extra_headers = NULL;
 199static int extra_headers_size = 0;
 200
 201static int git_format_config(const char *var, const char *value)
 202{
 203        if (!strcmp(var, "format.headers")) {
 204                int len = strlen(value);
 205                extra_headers_size += len + 1;
 206                extra_headers = xrealloc(extra_headers, extra_headers_size);
 207                extra_headers[extra_headers_size - len - 1] = 0;
 208                strcat(extra_headers, value);
 209                return 0;
 210        }
 211        if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 212                return 0;
 213        }
 214        return git_log_config(var, value);
 215}
 216
 217
 218static FILE *realstdout = NULL;
 219static const char *output_directory = NULL;
 220
 221static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 222{
 223        char filename[1024];
 224        char *sol;
 225        int len = 0;
 226
 227        if (output_directory) {
 228                strlcpy(filename, output_directory, 1010);
 229                len = strlen(filename);
 230                if (filename[len - 1] != '/')
 231                        filename[len++] = '/';
 232        }
 233
 234        sprintf(filename + len, "%04d", nr);
 235        len = strlen(filename);
 236
 237        sol = strstr(commit->buffer, "\n\n");
 238        if (sol) {
 239                int j, space = 1;
 240
 241                sol += 2;
 242                /* strip [PATCH] or [PATCH blabla] */
 243                if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 244                        char *eos = strchr(sol + 6, ']');
 245                        if (eos) {
 246                                while (isspace(*eos))
 247                                        eos++;
 248                                sol = eos;
 249                        }
 250                }
 251
 252                for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 253                        if (istitlechar(sol[j])) {
 254                                if (space) {
 255                                        filename[len++] = '-';
 256                                        space = 0;
 257                                }
 258                                filename[len++] = sol[j];
 259                                if (sol[j] == '.')
 260                                        while (sol[j + 1] == '.')
 261                                                j++;
 262                        } else
 263                                space = 1;
 264                }
 265                while (filename[len - 1] == '.' || filename[len - 1] == '-')
 266                        len--;
 267        }
 268        strcpy(filename + len, ".txt");
 269        fprintf(realstdout, "%s\n", filename);
 270        freopen(filename, "w", stdout);
 271}
 272
 273static int get_patch_id(struct commit *commit, struct diff_options *options,
 274                unsigned char *sha1)
 275{
 276        if (commit->parents)
 277                diff_tree_sha1(commit->parents->item->object.sha1,
 278                               commit->object.sha1, "", options);
 279        else
 280                diff_root_tree_sha1(commit->object.sha1, "", options);
 281        diffcore_std(options);
 282        return diff_flush_patch_id(options, sha1);
 283}
 284
 285static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 286{
 287        struct rev_info check_rev;
 288        struct commit *commit;
 289        struct object *o1, *o2;
 290        unsigned flags1, flags2;
 291        unsigned char sha1[20];
 292
 293        if (rev->pending.nr != 2)
 294                die("Need exactly one range.");
 295
 296        o1 = rev->pending.objects[0].item;
 297        flags1 = o1->flags;
 298        o2 = rev->pending.objects[1].item;
 299        flags2 = o2->flags;
 300
 301        if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 302                die("Not a range.");
 303
 304        diff_setup(options);
 305        options->recursive = 1;
 306        if (diff_setup_done(options) < 0)
 307                die("diff_setup_done failed");
 308
 309        /* given a range a..b get all patch ids for b..a */
 310        init_revisions(&check_rev, prefix);
 311        o1->flags ^= UNINTERESTING;
 312        o2->flags ^= UNINTERESTING;
 313        add_pending_object(&check_rev, o1, "o1");
 314        add_pending_object(&check_rev, o2, "o2");
 315        prepare_revision_walk(&check_rev);
 316
 317        while ((commit = get_revision(&check_rev)) != NULL) {
 318                /* ignore merges */
 319                if (commit->parents && commit->parents->next)
 320                        continue;
 321
 322                if (!get_patch_id(commit, options, sha1))
 323                        created_object(sha1, xcalloc(1, sizeof(struct object)));
 324        }
 325
 326        /* reset for next revision walk */
 327        clear_commit_marks((struct commit *)o1,
 328                        SEEN | UNINTERESTING | SHOWN | ADDED);
 329        clear_commit_marks((struct commit *)o2,
 330                        SEEN | UNINTERESTING | SHOWN | ADDED);
 331        o1->flags = flags1;
 332        o2->flags = flags2;
 333}
 334
 335static void gen_message_id(char *dest, unsigned int length, char *base)
 336{
 337        const char *committer = git_committer_info(1);
 338        const char *email_start = strrchr(committer, '<');
 339        const char *email_end = strrchr(committer, '>');
 340        if(!email_start || !email_end || email_start > email_end - 1)
 341                die("Could not extract email from committer identity.");
 342        snprintf(dest, length, "%s.%lu.git.%.*s", base,
 343                 (unsigned long) time(NULL),
 344                 (int)(email_end - email_start - 1), email_start + 1);
 345}
 346
 347int cmd_format_patch(int argc, const char **argv, const char *prefix)
 348{
 349        struct commit *commit;
 350        struct commit **list = NULL;
 351        struct rev_info rev;
 352        int nr = 0, total, i, j;
 353        int use_stdout = 0;
 354        int numbered = 0;
 355        int start_number = -1;
 356        int keep_subject = 0;
 357        int ignore_if_in_upstream = 0;
 358        int thread = 0;
 359        const char *in_reply_to = NULL;
 360        struct diff_options patch_id_opts;
 361        char *add_signoff = NULL;
 362        char message_id[1024];
 363        char ref_message_id[1024];
 364
 365        setup_ident();
 366        git_config(git_format_config);
 367        init_revisions(&rev, prefix);
 368        rev.commit_format = CMIT_FMT_EMAIL;
 369        rev.verbose_header = 1;
 370        rev.diff = 1;
 371        rev.combine_merges = 0;
 372        rev.ignore_merges = 1;
 373        rev.diffopt.msg_sep = "";
 374        rev.diffopt.recursive = 1;
 375
 376        rev.extra_headers = extra_headers;
 377
 378        /*
 379         * Parse the arguments before setup_revisions(), or something
 380         * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 381         * possibly a valid SHA1.
 382         */
 383        for (i = 1, j = 1; i < argc; i++) {
 384                if (!strcmp(argv[i], "--stdout"))
 385                        use_stdout = 1;
 386                else if (!strcmp(argv[i], "-n") ||
 387                                !strcmp(argv[i], "--numbered"))
 388                        numbered = 1;
 389                else if (!strncmp(argv[i], "--start-number=", 15))
 390                        start_number = strtol(argv[i] + 15, NULL, 10);
 391                else if (!strcmp(argv[i], "--start-number")) {
 392                        i++;
 393                        if (i == argc)
 394                                die("Need a number for --start-number");
 395                        start_number = strtol(argv[i], NULL, 10);
 396                }
 397                else if (!strcmp(argv[i], "-k") ||
 398                                !strcmp(argv[i], "--keep-subject")) {
 399                        keep_subject = 1;
 400                        rev.total = -1;
 401                }
 402                else if (!strcmp(argv[i], "--output-directory") ||
 403                         !strcmp(argv[i], "-o")) {
 404                        i++;
 405                        if (argc <= i)
 406                                die("Which directory?");
 407                        if (output_directory)
 408                                die("Two output directories?");
 409                        output_directory = argv[i];
 410                }
 411                else if (!strcmp(argv[i], "--signoff") ||
 412                         !strcmp(argv[i], "-s")) {
 413                        const char *committer;
 414                        const char *endpos;
 415                        committer = git_committer_info(1);
 416                        endpos = strchr(committer, '>');
 417                        if (!endpos)
 418                                die("bogos committer info %s\n", committer);
 419                        add_signoff = xmalloc(endpos - committer + 2);
 420                        memcpy(add_signoff, committer, endpos - committer + 1);
 421                        add_signoff[endpos - committer + 1] = 0;
 422                }
 423                else if (!strcmp(argv[i], "--attach"))
 424                        rev.mime_boundary = git_version_string;
 425                else if (!strncmp(argv[i], "--attach=", 9))
 426                        rev.mime_boundary = argv[i] + 9;
 427                else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 428                        ignore_if_in_upstream = 1;
 429                else if (!strcmp(argv[i], "--thread"))
 430                        thread = 1;
 431                else if (!strncmp(argv[i], "--in-reply-to=", 14))
 432                        in_reply_to = argv[i] + 14;
 433                else if (!strcmp(argv[i], "--in-reply-to")) {
 434                        i++;
 435                        if (i == argc)
 436                                die("Need a Message-Id for --in-reply-to");
 437                        in_reply_to = argv[i];
 438                }
 439                else
 440                        argv[j++] = argv[i];
 441        }
 442        argc = j;
 443
 444        if (start_number < 0)
 445                start_number = 1;
 446        if (numbered && keep_subject)
 447                die ("-n and -k are mutually exclusive.");
 448
 449        argc = setup_revisions(argc, argv, &rev, "HEAD");
 450        if (argc > 1)
 451                die ("unrecognized argument: %s", argv[1]);
 452
 453        if (!rev.diffopt.output_format)
 454                rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 455
 456        if (!output_directory)
 457                output_directory = prefix;
 458
 459        if (output_directory) {
 460                if (use_stdout)
 461                        die("standard output, or directory, which one?");
 462                if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 463                        die("Could not create directory %s",
 464                            output_directory);
 465        }
 466
 467        if (rev.pending.nr == 1) {
 468                rev.pending.objects[0].item->flags |= UNINTERESTING;
 469                add_head(&rev);
 470        }
 471
 472        if (ignore_if_in_upstream)
 473                get_patch_ids(&rev, &patch_id_opts, prefix);
 474
 475        if (!use_stdout)
 476                realstdout = fdopen(dup(1), "w");
 477
 478        prepare_revision_walk(&rev);
 479        while ((commit = get_revision(&rev)) != NULL) {
 480                unsigned char sha1[20];
 481
 482                /* ignore merges */
 483                if (commit->parents && commit->parents->next)
 484                        continue;
 485
 486                if (ignore_if_in_upstream &&
 487                                !get_patch_id(commit, &patch_id_opts, sha1) &&
 488                                lookup_object(sha1))
 489                        continue;
 490
 491                nr++;
 492                list = xrealloc(list, nr * sizeof(list[0]));
 493                list[nr - 1] = commit;
 494        }
 495        total = nr;
 496        if (numbered)
 497                rev.total = total + start_number - 1;
 498        rev.add_signoff = add_signoff;
 499        rev.ref_message_id = in_reply_to;
 500        while (0 <= --nr) {
 501                int shown;
 502                commit = list[nr];
 503                rev.nr = total - nr + (start_number - 1);
 504                /* Make the second and subsequent mails replies to the first */
 505                if (thread) {
 506                        if (nr == (total - 2)) {
 507                                strncpy(ref_message_id, message_id,
 508                                        sizeof(ref_message_id));
 509                                ref_message_id[sizeof(ref_message_id)-1]='\0';
 510                                rev.ref_message_id = ref_message_id;
 511                        }
 512                        gen_message_id(message_id, sizeof(message_id),
 513                                       sha1_to_hex(commit->object.sha1));
 514                        rev.message_id = message_id;
 515                }
 516                if (!use_stdout)
 517                        reopen_stdout(commit, rev.nr, keep_subject);
 518                shown = log_tree_commit(&rev, commit);
 519                free(commit->buffer);
 520                commit->buffer = NULL;
 521
 522                /* We put one extra blank line between formatted
 523                 * patches and this flag is used by log-tree code
 524                 * to see if it needs to emit a LF before showing
 525                 * the log; when using one file per patch, we do
 526                 * not want the extra blank line.
 527                 */
 528                if (!use_stdout)
 529                        rev.shown_one = 0;
 530                if (shown) {
 531                        if (rev.mime_boundary)
 532                                printf("\n--%s%s--\n\n\n",
 533                                       mime_boundary_leader,
 534                                       rev.mime_boundary);
 535                        else
 536                                printf("-- \n%s\n\n", git_version_string);
 537                }
 538                if (!use_stdout)
 539                        fclose(stdout);
 540        }
 541        free(list);
 542        return 0;
 543}
 544
 545static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 546{
 547        unsigned char sha1[20];
 548        if (get_sha1(arg, sha1) == 0) {
 549                struct commit *commit = lookup_commit_reference(sha1);
 550                if (commit) {
 551                        commit->object.flags |= flags;
 552                        add_pending_object(revs, &commit->object, arg);
 553                        return 0;
 554                }
 555        }
 556        return -1;
 557}
 558
 559static const char cherry_usage[] =
 560"git-cherry [-v] <upstream> [<head>] [<limit>]";
 561int cmd_cherry(int argc, const char **argv, const char *prefix)
 562{
 563        struct rev_info revs;
 564        struct diff_options patch_id_opts;
 565        struct commit *commit;
 566        struct commit_list *list = NULL;
 567        const char *upstream;
 568        const char *head = "HEAD";
 569        const char *limit = NULL;
 570        int verbose = 0;
 571
 572        if (argc > 1 && !strcmp(argv[1], "-v")) {
 573                verbose = 1;
 574                argc--;
 575                argv++;
 576        }
 577
 578        switch (argc) {
 579        case 4:
 580                limit = argv[3];
 581                /* FALLTHROUGH */
 582        case 3:
 583                head = argv[2];
 584                /* FALLTHROUGH */
 585        case 2:
 586                upstream = argv[1];
 587                break;
 588        default:
 589                usage(cherry_usage);
 590        }
 591
 592        init_revisions(&revs, prefix);
 593        revs.diff = 1;
 594        revs.combine_merges = 0;
 595        revs.ignore_merges = 1;
 596        revs.diffopt.recursive = 1;
 597
 598        if (add_pending_commit(head, &revs, 0))
 599                die("Unknown commit %s", head);
 600        if (add_pending_commit(upstream, &revs, UNINTERESTING))
 601                die("Unknown commit %s", upstream);
 602
 603        /* Don't say anything if head and upstream are the same. */
 604        if (revs.pending.nr == 2) {
 605                struct object_array_entry *o = revs.pending.objects;
 606                if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 607                        return 0;
 608        }
 609
 610        get_patch_ids(&revs, &patch_id_opts, prefix);
 611
 612        if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 613                die("Unknown commit %s", limit);
 614
 615        /* reverse the list of commits */
 616        prepare_revision_walk(&revs);
 617        while ((commit = get_revision(&revs)) != NULL) {
 618                /* ignore merges */
 619                if (commit->parents && commit->parents->next)
 620                        continue;
 621
 622                commit_list_insert(commit, &list);
 623        }
 624
 625        while (list) {
 626                unsigned char sha1[20];
 627                char sign = '+';
 628
 629                commit = list->item;
 630                if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 631                    lookup_object(sha1))
 632                        sign = '-';
 633
 634                if (verbose) {
 635                        static char buf[16384];
 636                        pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 637                                            buf, sizeof(buf), 0, NULL, NULL, 0);
 638                        printf("%c %s %s\n", sign,
 639                               sha1_to_hex(commit->object.sha1), buf);
 640                }
 641                else {
 642                        printf("%c %s\n", sign,
 643                               sha1_to_hex(commit->object.sha1));
 644                }
 645
 646                list = list->next;
 647        }
 648
 649        return 0;
 650}