Andrew's git / gitweb.git / builtin-log.c
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builtin-log.con commit Enable reflogs by default in any repository with a working directory. (0bee591)
   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 <time.h>
  15#include <sys/time.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        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        if (argc > 1)
  33                die("unrecognized argument: %s", argv[1]);
  34}
  35
  36static int cmd_log_walk(struct rev_info *rev)
  37{
  38        struct commit *commit;
  39
  40        prepare_revision_walk(rev);
  41        while ((commit = get_revision(rev)) != NULL) {
  42                log_tree_commit(rev, commit);
  43                free(commit->buffer);
  44                commit->buffer = NULL;
  45                free_commit_list(commit->parents);
  46                commit->parents = NULL;
  47        }
  48        return 0;
  49}
  50
  51static int git_log_config(const char *var, const char *value)
  52{
  53        if (!strcmp(var, "log.showroot")) {
  54                default_show_root = git_config_bool(var, value);
  55                return 0;
  56        }
  57        return git_diff_ui_config(var, value);
  58}
  59
  60int cmd_whatchanged(int argc, const char **argv, const char *prefix)
  61{
  62        struct rev_info rev;
  63
  64        git_config(git_log_config);
  65        init_revisions(&rev, prefix);
  66        rev.diff = 1;
  67        rev.diffopt.recursive = 1;
  68        rev.simplify_history = 0;
  69        cmd_log_init(argc, argv, prefix, &rev);
  70        if (!rev.diffopt.output_format)
  71                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  72        return cmd_log_walk(&rev);
  73}
  74
  75static int show_object(const unsigned char *sha1, int suppress_header)
  76{
  77        unsigned long size;
  78        char type[20];
  79        char *buf = read_sha1_file(sha1, type, &size);
  80        int offset = 0;
  81
  82        if (!buf)
  83                return error("Could not read object %s", sha1_to_hex(sha1));
  84
  85        if (suppress_header)
  86                while (offset < size && buf[offset++] != '\n') {
  87                        int new_offset = offset;
  88                        while (new_offset < size && buf[new_offset++] != '\n')
  89                                ; /* do nothing */
  90                        offset = new_offset;
  91                }
  92
  93        if (offset < size)
  94                fwrite(buf + offset, size - offset, 1, stdout);
  95        free(buf);
  96        return 0;
  97}
  98
  99static int show_tree_object(const unsigned char *sha1,
 100                const char *base, int baselen,
 101                const char *pathname, unsigned mode, int stage)
 102{
 103        printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
 104        return 0;
 105}
 106
 107int cmd_show(int argc, const char **argv, const char *prefix)
 108{
 109        struct rev_info rev;
 110        struct object_array_entry *objects;
 111        int i, count, ret = 0;
 112
 113        git_config(git_log_config);
 114        init_revisions(&rev, prefix);
 115        rev.diff = 1;
 116        rev.diffopt.recursive = 1;
 117        rev.combine_merges = 1;
 118        rev.dense_combined_merges = 1;
 119        rev.always_show_header = 1;
 120        rev.ignore_merges = 0;
 121        rev.no_walk = 1;
 122        cmd_log_init(argc, argv, prefix, &rev);
 123
 124        count = rev.pending.nr;
 125        objects = rev.pending.objects;
 126        for (i = 0; i < count && !ret; i++) {
 127                struct object *o = objects[i].item;
 128                const char *name = objects[i].name;
 129                switch (o->type) {
 130                case OBJ_BLOB:
 131                        ret = show_object(o->sha1, 0);
 132                        break;
 133                case OBJ_TAG: {
 134                        struct tag *t = (struct tag *)o;
 135
 136                        printf("%stag %s%s\n\n",
 137                                        diff_get_color(rev.diffopt.color_diff,
 138                                                DIFF_COMMIT),
 139                                        t->tag,
 140                                        diff_get_color(rev.diffopt.color_diff,
 141                                                DIFF_RESET));
 142                        ret = show_object(o->sha1, 1);
 143                        objects[i].item = (struct object *)t->tagged;
 144                        i--;
 145                        break;
 146                }
 147                case OBJ_TREE:
 148                        printf("%stree %s%s\n\n",
 149                                        diff_get_color(rev.diffopt.color_diff,
 150                                                DIFF_COMMIT),
 151                                        name,
 152                                        diff_get_color(rev.diffopt.color_diff,
 153                                                DIFF_RESET));
 154                        read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
 155                                        show_tree_object);
 156                        break;
 157                case OBJ_COMMIT:
 158                        rev.pending.nr = rev.pending.alloc = 0;
 159                        rev.pending.objects = NULL;
 160                        add_object_array(o, name, &rev.pending);
 161                        ret = cmd_log_walk(&rev);
 162                        break;
 163                default:
 164                        ret = error("Unknown type: %d", o->type);
 165                }
 166        }
 167        free(objects);
 168        return ret;
 169}
 170
 171int cmd_log(int argc, const char **argv, const char *prefix)
 172{
 173        struct rev_info rev;
 174
 175        git_config(git_log_config);
 176        init_revisions(&rev, prefix);
 177        rev.always_show_header = 1;
 178        cmd_log_init(argc, argv, prefix, &rev);
 179        return cmd_log_walk(&rev);
 180}
 181
 182static int istitlechar(char c)
 183{
 184        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 185                (c >= '0' && c <= '9') || c == '.' || c == '_';
 186}
 187
 188static char *extra_headers = NULL;
 189static int extra_headers_size = 0;
 190
 191static int git_format_config(const char *var, const char *value)
 192{
 193        if (!strcmp(var, "format.headers")) {
 194                int len = strlen(value);
 195                extra_headers_size += len + 1;
 196                extra_headers = xrealloc(extra_headers, extra_headers_size);
 197                extra_headers[extra_headers_size - len - 1] = 0;
 198                strcat(extra_headers, value);
 199                return 0;
 200        }
 201        if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 202                return 0;
 203        }
 204        return git_log_config(var, value);
 205}
 206
 207
 208static FILE *realstdout = NULL;
 209static const char *output_directory = NULL;
 210
 211static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 212{
 213        char filename[1024];
 214        char *sol;
 215        int len = 0;
 216
 217        if (output_directory) {
 218                strlcpy(filename, output_directory, 1010);
 219                len = strlen(filename);
 220                if (filename[len - 1] != '/')
 221                        filename[len++] = '/';
 222        }
 223
 224        sprintf(filename + len, "%04d", nr);
 225        len = strlen(filename);
 226
 227        sol = strstr(commit->buffer, "\n\n");
 228        if (sol) {
 229                int j, space = 1;
 230
 231                sol += 2;
 232                /* strip [PATCH] or [PATCH blabla] */
 233                if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 234                        char *eos = strchr(sol + 6, ']');
 235                        if (eos) {
 236                                while (isspace(*eos))
 237                                        eos++;
 238                                sol = eos;
 239                        }
 240                }
 241
 242                for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 243                        if (istitlechar(sol[j])) {
 244                                if (space) {
 245                                        filename[len++] = '-';
 246                                        space = 0;
 247                                }
 248                                filename[len++] = sol[j];
 249                                if (sol[j] == '.')
 250                                        while (sol[j + 1] == '.')
 251                                                j++;
 252                        } else
 253                                space = 1;
 254                }
 255                while (filename[len - 1] == '.' || filename[len - 1] == '-')
 256                        len--;
 257        }
 258        strcpy(filename + len, ".txt");
 259        fprintf(realstdout, "%s\n", filename);
 260        freopen(filename, "w", stdout);
 261}
 262
 263static int get_patch_id(struct commit *commit, struct diff_options *options,
 264                unsigned char *sha1)
 265{
 266        if (commit->parents)
 267                diff_tree_sha1(commit->parents->item->object.sha1,
 268                               commit->object.sha1, "", options);
 269        else
 270                diff_root_tree_sha1(commit->object.sha1, "", options);
 271        diffcore_std(options);
 272        return diff_flush_patch_id(options, sha1);
 273}
 274
 275static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 276{
 277        struct rev_info check_rev;
 278        struct commit *commit;
 279        struct object *o1, *o2;
 280        unsigned flags1, flags2;
 281        unsigned char sha1[20];
 282
 283        if (rev->pending.nr != 2)
 284                die("Need exactly one range.");
 285
 286        o1 = rev->pending.objects[0].item;
 287        flags1 = o1->flags;
 288        o2 = rev->pending.objects[1].item;
 289        flags2 = o2->flags;
 290
 291        if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 292                die("Not a range.");
 293
 294        diff_setup(options);
 295        options->recursive = 1;
 296        if (diff_setup_done(options) < 0)
 297                die("diff_setup_done failed");
 298
 299        /* given a range a..b get all patch ids for b..a */
 300        init_revisions(&check_rev, prefix);
 301        o1->flags ^= UNINTERESTING;
 302        o2->flags ^= UNINTERESTING;
 303        add_pending_object(&check_rev, o1, "o1");
 304        add_pending_object(&check_rev, o2, "o2");
 305        prepare_revision_walk(&check_rev);
 306
 307        while ((commit = get_revision(&check_rev)) != NULL) {
 308                /* ignore merges */
 309                if (commit->parents && commit->parents->next)
 310                        continue;
 311
 312                if (!get_patch_id(commit, options, sha1))
 313                        created_object(sha1, xcalloc(1, sizeof(struct object)));
 314        }
 315
 316        /* reset for next revision walk */
 317        clear_commit_marks((struct commit *)o1,
 318                        SEEN | UNINTERESTING | SHOWN | ADDED);
 319        clear_commit_marks((struct commit *)o2,
 320                        SEEN | UNINTERESTING | SHOWN | ADDED);
 321        o1->flags = flags1;
 322        o2->flags = flags2;
 323}
 324
 325static void gen_message_id(char *dest, unsigned int length, char *base)
 326{
 327        const char *committer = git_committer_info(1);
 328        const char *email_start = strrchr(committer, '<');
 329        const char *email_end = strrchr(committer, '>');
 330        if(!email_start || !email_end || email_start > email_end - 1)
 331                die("Could not extract email from committer identity.");
 332        snprintf(dest, length, "%s.%lu.git.%.*s", base,
 333                 (unsigned long) time(NULL),
 334                 (int)(email_end - email_start - 1), email_start + 1);
 335}
 336
 337int cmd_format_patch(int argc, const char **argv, const char *prefix)
 338{
 339        struct commit *commit;
 340        struct commit **list = NULL;
 341        struct rev_info rev;
 342        int nr = 0, total, i, j;
 343        int use_stdout = 0;
 344        int numbered = 0;
 345        int start_number = -1;
 346        int keep_subject = 0;
 347        int ignore_if_in_upstream = 0;
 348        int thread = 0;
 349        const char *in_reply_to = NULL;
 350        struct diff_options patch_id_opts;
 351        char *add_signoff = NULL;
 352        char message_id[1024];
 353        char ref_message_id[1024];
 354
 355        setup_ident();
 356        git_config(git_format_config);
 357        init_revisions(&rev, prefix);
 358        rev.commit_format = CMIT_FMT_EMAIL;
 359        rev.verbose_header = 1;
 360        rev.diff = 1;
 361        rev.combine_merges = 0;
 362        rev.ignore_merges = 1;
 363        rev.diffopt.msg_sep = "";
 364        rev.diffopt.recursive = 1;
 365
 366        rev.extra_headers = extra_headers;
 367
 368        /*
 369         * Parse the arguments before setup_revisions(), or something
 370         * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 371         * possibly a valid SHA1.
 372         */
 373        for (i = 1, j = 1; i < argc; i++) {
 374                if (!strcmp(argv[i], "--stdout"))
 375                        use_stdout = 1;
 376                else if (!strcmp(argv[i], "-n") ||
 377                                !strcmp(argv[i], "--numbered"))
 378                        numbered = 1;
 379                else if (!strncmp(argv[i], "--start-number=", 15))
 380                        start_number = strtol(argv[i] + 15, NULL, 10);
 381                else if (!strcmp(argv[i], "--start-number")) {
 382                        i++;
 383                        if (i == argc)
 384                                die("Need a number for --start-number");
 385                        start_number = strtol(argv[i], NULL, 10);
 386                }
 387                else if (!strcmp(argv[i], "-k") ||
 388                                !strcmp(argv[i], "--keep-subject")) {
 389                        keep_subject = 1;
 390                        rev.total = -1;
 391                }
 392                else if (!strcmp(argv[i], "--output-directory") ||
 393                         !strcmp(argv[i], "-o")) {
 394                        i++;
 395                        if (argc <= i)
 396                                die("Which directory?");
 397                        if (output_directory)
 398                                die("Two output directories?");
 399                        output_directory = argv[i];
 400                }
 401                else if (!strcmp(argv[i], "--signoff") ||
 402                         !strcmp(argv[i], "-s")) {
 403                        const char *committer;
 404                        const char *endpos;
 405                        committer = git_committer_info(1);
 406                        endpos = strchr(committer, '>');
 407                        if (!endpos)
 408                                die("bogos committer info %s\n", committer);
 409                        add_signoff = xmalloc(endpos - committer + 2);
 410                        memcpy(add_signoff, committer, endpos - committer + 1);
 411                        add_signoff[endpos - committer + 1] = 0;
 412                }
 413                else if (!strcmp(argv[i], "--attach"))
 414                        rev.mime_boundary = git_version_string;
 415                else if (!strncmp(argv[i], "--attach=", 9))
 416                        rev.mime_boundary = argv[i] + 9;
 417                else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 418                        ignore_if_in_upstream = 1;
 419                else if (!strcmp(argv[i], "--thread"))
 420                        thread = 1;
 421                else if (!strncmp(argv[i], "--in-reply-to=", 14))
 422                        in_reply_to = argv[i] + 14;
 423                else if (!strcmp(argv[i], "--in-reply-to")) {
 424                        i++;
 425                        if (i == argc)
 426                                die("Need a Message-Id for --in-reply-to");
 427                        in_reply_to = argv[i];
 428                }
 429                else
 430                        argv[j++] = argv[i];
 431        }
 432        argc = j;
 433
 434        if (start_number < 0)
 435                start_number = 1;
 436        if (numbered && keep_subject)
 437                die ("-n and -k are mutually exclusive.");
 438
 439        argc = setup_revisions(argc, argv, &rev, "HEAD");
 440        if (argc > 1)
 441                die ("unrecognized argument: %s", argv[1]);
 442
 443        if (!rev.diffopt.output_format)
 444                rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 445
 446        if (!output_directory)
 447                output_directory = prefix;
 448
 449        if (output_directory) {
 450                if (use_stdout)
 451                        die("standard output, or directory, which one?");
 452                if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 453                        die("Could not create directory %s",
 454                            output_directory);
 455        }
 456
 457        if (rev.pending.nr == 1) {
 458                rev.pending.objects[0].item->flags |= UNINTERESTING;
 459                add_head(&rev);
 460        }
 461
 462        if (ignore_if_in_upstream)
 463                get_patch_ids(&rev, &patch_id_opts, prefix);
 464
 465        if (!use_stdout)
 466                realstdout = fdopen(dup(1), "w");
 467
 468        prepare_revision_walk(&rev);
 469        while ((commit = get_revision(&rev)) != NULL) {
 470                unsigned char sha1[20];
 471
 472                /* ignore merges */
 473                if (commit->parents && commit->parents->next)
 474                        continue;
 475
 476                if (ignore_if_in_upstream &&
 477                                !get_patch_id(commit, &patch_id_opts, sha1) &&
 478                                lookup_object(sha1))
 479                        continue;
 480
 481                nr++;
 482                list = xrealloc(list, nr * sizeof(list[0]));
 483                list[nr - 1] = commit;
 484        }
 485        total = nr;
 486        if (numbered)
 487                rev.total = total + start_number - 1;
 488        rev.add_signoff = add_signoff;
 489        rev.ref_message_id = in_reply_to;
 490        while (0 <= --nr) {
 491                int shown;
 492                commit = list[nr];
 493                rev.nr = total - nr + (start_number - 1);
 494                /* Make the second and subsequent mails replies to the first */
 495                if (thread) {
 496                        if (nr == (total - 2)) {
 497                                strncpy(ref_message_id, message_id,
 498                                        sizeof(ref_message_id));
 499                                ref_message_id[sizeof(ref_message_id)-1]='\0';
 500                                rev.ref_message_id = ref_message_id;
 501                        }
 502                        gen_message_id(message_id, sizeof(message_id),
 503                                       sha1_to_hex(commit->object.sha1));
 504                        rev.message_id = message_id;
 505                }
 506                if (!use_stdout)
 507                        reopen_stdout(commit, rev.nr, keep_subject);
 508                shown = log_tree_commit(&rev, commit);
 509                free(commit->buffer);
 510                commit->buffer = NULL;
 511
 512                /* We put one extra blank line between formatted
 513                 * patches and this flag is used by log-tree code
 514                 * to see if it needs to emit a LF before showing
 515                 * the log; when using one file per patch, we do
 516                 * not want the extra blank line.
 517                 */
 518                if (!use_stdout)
 519                        rev.shown_one = 0;
 520                if (shown) {
 521                        if (rev.mime_boundary)
 522                                printf("\n--%s%s--\n\n\n",
 523                                       mime_boundary_leader,
 524                                       rev.mime_boundary);
 525                        else
 526                                printf("-- \n%s\n\n", git_version_string);
 527                }
 528                if (!use_stdout)
 529                        fclose(stdout);
 530        }
 531        free(list);
 532        return 0;
 533}
 534
 535static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 536{
 537        unsigned char sha1[20];
 538        if (get_sha1(arg, sha1) == 0) {
 539                struct commit *commit = lookup_commit_reference(sha1);
 540                if (commit) {
 541                        commit->object.flags |= flags;
 542                        add_pending_object(revs, &commit->object, arg);
 543                        return 0;
 544                }
 545        }
 546        return -1;
 547}
 548
 549static const char cherry_usage[] =
 550"git-cherry [-v] <upstream> [<head>] [<limit>]";
 551int cmd_cherry(int argc, const char **argv, const char *prefix)
 552{
 553        struct rev_info revs;
 554        struct diff_options patch_id_opts;
 555        struct commit *commit;
 556        struct commit_list *list = NULL;
 557        const char *upstream;
 558        const char *head = "HEAD";
 559        const char *limit = NULL;
 560        int verbose = 0;
 561
 562        if (argc > 1 && !strcmp(argv[1], "-v")) {
 563                verbose = 1;
 564                argc--;
 565                argv++;
 566        }
 567
 568        switch (argc) {
 569        case 4:
 570                limit = argv[3];
 571                /* FALLTHROUGH */
 572        case 3:
 573                head = argv[2];
 574                /* FALLTHROUGH */
 575        case 2:
 576                upstream = argv[1];
 577                break;
 578        default:
 579                usage(cherry_usage);
 580        }
 581
 582        init_revisions(&revs, prefix);
 583        revs.diff = 1;
 584        revs.combine_merges = 0;
 585        revs.ignore_merges = 1;
 586        revs.diffopt.recursive = 1;
 587
 588        if (add_pending_commit(head, &revs, 0))
 589                die("Unknown commit %s", head);
 590        if (add_pending_commit(upstream, &revs, UNINTERESTING))
 591                die("Unknown commit %s", upstream);
 592
 593        /* Don't say anything if head and upstream are the same. */
 594        if (revs.pending.nr == 2) {
 595                struct object_array_entry *o = revs.pending.objects;
 596                if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 597                        return 0;
 598        }
 599
 600        get_patch_ids(&revs, &patch_id_opts, prefix);
 601
 602        if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 603                die("Unknown commit %s", limit);
 604
 605        /* reverse the list of commits */
 606        prepare_revision_walk(&revs);
 607        while ((commit = get_revision(&revs)) != NULL) {
 608                /* ignore merges */
 609                if (commit->parents && commit->parents->next)
 610                        continue;
 611
 612                commit_list_insert(commit, &list);
 613        }
 614
 615        while (list) {
 616                unsigned char sha1[20];
 617                char sign = '+';
 618
 619                commit = list->item;
 620                if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 621                    lookup_object(sha1))
 622                        sign = '-';
 623
 624                if (verbose) {
 625                        static char buf[16384];
 626                        pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 627                                            buf, sizeof(buf), 0, NULL, NULL, 0);
 628                        printf("%c %s %s\n", sign,
 629                               sha1_to_hex(commit->object.sha1), buf);
 630                }
 631                else {
 632                        printf("%c %s\n", sign,
 633                               sha1_to_hex(commit->object.sha1));
 634                }
 635
 636                list = list->next;
 637        }
 638
 639        return 0;
 640}