builtin-log.c

   1 /*
   2  * Builtin "git log" and related commands (show, whatchanged)
   3  *
   4  * (C) Copyright 2006 Linus Torvalds
   5  *               2006 Junio Hamano
   6  */
   7 #include "cache.h"
   8 #include "commit.h"
   9 #include "diff.h"
  10 #include "revision.h"
  11 #include "log-tree.h"
  12 #include "builtin.h"
  13 #include "tag.h"
  14
  15 static int default_show_root = 1;
  16
  17 /* this is in builtin-diff.c */
  18 void add_head(struct rev_info *revs);
  19
  20 static 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 (MAX_ENCODING_LENGTH <= strlen(arg))
  37                                 die(" Value of output encoding '%s' too long",
  38                                     arg);
  39                         if (strcmp(arg, "none"))
  40                                 strcpy(git_commit_encoding, arg);
  41                         else
  42                                 git_commit_encoding[0] = 0;
  43                 }
  44                 else
  45                         die("unrecognized argument: %s", arg);
  46         }
  47 }
  48
  49 static int cmd_log_walk(struct rev_info *rev)
  50 {
  51         struct commit *commit;
  52
  53         prepare_revision_walk(rev);
  54         while ((commit = get_revision(rev)) != NULL) {
  55                 log_tree_commit(rev, commit);
  56                 free(commit->buffer);
  57                 commit->buffer = NULL;
  58                 free_commit_list(commit->parents);
  59                 commit->parents = NULL;
  60         }
  61         return 0;
  62 }
  63
  64 static 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
  73 int 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
  88 static 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
 112 static 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
 120 int 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
 184 int 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
 195 static int istitlechar(char c)
 196 {
 197         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 198                 (c >= '0' && c <= '9') || c == '.' || c == '_';
 199 }
 200
 201 static char *extra_headers = NULL;
 202 static int extra_headers_size = 0;
 203
 204 static int git_format_config(const char *var, const char *value)
 205 {
 206         if (!strcmp(var, "format.headers")) {
 207                 int len = strlen(value);
 208                 extra_headers_size += len + 1;
 209                 extra_headers = xrealloc(extra_headers, extra_headers_size);
 210                 extra_headers[extra_headers_size - len - 1] = 0;
 211                 strcat(extra_headers, value);
 212                 return 0;
 213         }
 214         if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 215                 return 0;
 216         }
 217         return git_log_config(var, value);
 218 }
 219
 220
 221 static FILE *realstdout = NULL;
 222 static const char *output_directory = NULL;
 223
 224 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 225 {
 226         char filename[1024];
 227         char *sol;
 228         int len = 0;
 229
 230         if (output_directory) {
 231                 strlcpy(filename, output_directory, 1010);
 232                 len = strlen(filename);
 233                 if (filename[len - 1] != '/')
 234                         filename[len++] = '/';
 235         }
 236
 237         sprintf(filename + len, "%04d", nr);
 238         len = strlen(filename);
 239
 240         sol = strstr(commit->buffer, "\n\n");
 241         if (sol) {
 242                 int j, space = 1;
 243
 244                 sol += 2;
 245                 /* strip [PATCH] or [PATCH blabla] */
 246                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 247                         char *eos = strchr(sol + 6, ']');
 248                         if (eos) {
 249                                 while (isspace(*eos))
 250                                         eos++;
 251                                 sol = eos;
 252                         }
 253                 }
 254
 255                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 256                         if (istitlechar(sol[j])) {
 257                                 if (space) {
 258                                         filename[len++] = '-';
 259                                         space = 0;
 260                                 }
 261                                 filename[len++] = sol[j];
 262                                 if (sol[j] == '.')
 263                                         while (sol[j + 1] == '.')
 264                                                 j++;
 265                         } else
 266                                 space = 1;
 267                 }
 268                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 269                         len--;
 270         }
 271         strcpy(filename + len, ".txt");
 272         fprintf(realstdout, "%s\n", filename);
 273         freopen(filename, "w", stdout);
 274 }
 275
 276 static int get_patch_id(struct commit *commit, struct diff_options *options,
 277                 unsigned char *sha1)
 278 {
 279         if (commit->parents)
 280                 diff_tree_sha1(commit->parents->item->object.sha1,
 281                                commit->object.sha1, "", options);
 282         else
 283                 diff_root_tree_sha1(commit->object.sha1, "", options);
 284         diffcore_std(options);
 285         return diff_flush_patch_id(options, sha1);
 286 }
 287
 288 static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 289 {
 290         struct rev_info check_rev;
 291         struct commit *commit;
 292         struct object *o1, *o2;
 293         unsigned flags1, flags2;
 294         unsigned char sha1[20];
 295
 296         if (rev->pending.nr != 2)
 297                 die("Need exactly one range.");
 298
 299         o1 = rev->pending.objects[0].item;
 300         flags1 = o1->flags;
 301         o2 = rev->pending.objects[1].item;
 302         flags2 = o2->flags;
 303
 304         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 305                 die("Not a range.");
 306
 307         diff_setup(options);
 308         options->recursive = 1;
 309         if (diff_setup_done(options) < 0)
 310                 die("diff_setup_done failed");
 311
 312         /* given a range a..b get all patch ids for b..a */
 313         init_revisions(&check_rev, prefix);
 314         o1->flags ^= UNINTERESTING;
 315         o2->flags ^= UNINTERESTING;
 316         add_pending_object(&check_rev, o1, "o1");
 317         add_pending_object(&check_rev, o2, "o2");
 318         prepare_revision_walk(&check_rev);
 319
 320         while ((commit = get_revision(&check_rev)) != NULL) {
 321                 /* ignore merges */
 322                 if (commit->parents && commit->parents->next)
 323                         continue;
 324
 325                 if (!get_patch_id(commit, options, sha1))
 326                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 327         }
 328
 329         /* reset for next revision walk */
 330         clear_commit_marks((struct commit *)o1,
 331                         SEEN | UNINTERESTING | SHOWN | ADDED);
 332         clear_commit_marks((struct commit *)o2,
 333                         SEEN | UNINTERESTING | SHOWN | ADDED);
 334         o1->flags = flags1;
 335         o2->flags = flags2;
 336 }
 337
 338 static void gen_message_id(char *dest, unsigned int length, char *base)
 339 {
 340         const char *committer = git_committer_info(1);
 341         const char *email_start = strrchr(committer, '<');
 342         const char *email_end = strrchr(committer, '>');
 343         if(!email_start || !email_end || email_start > email_end - 1)
 344                 die("Could not extract email from committer identity.");
 345         snprintf(dest, length, "%s.%lu.git.%.*s", base,
 346                  (unsigned long) time(NULL),
 347                  (int)(email_end - email_start - 1), email_start + 1);
 348 }
 349
 350 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 351 {
 352         struct commit *commit;
 353         struct commit **list = NULL;
 354         struct rev_info rev;
 355         int nr = 0, total, i, j;
 356         int use_stdout = 0;
 357         int numbered = 0;
 358         int start_number = -1;
 359         int keep_subject = 0;
 360         int ignore_if_in_upstream = 0;
 361         int thread = 0;
 362         const char *in_reply_to = NULL;
 363         struct diff_options patch_id_opts;
 364         char *add_signoff = NULL;
 365         char message_id[1024];
 366         char ref_message_id[1024];
 367
 368         setup_ident();
 369         git_config(git_format_config);
 370         init_revisions(&rev, prefix);
 371         rev.commit_format = CMIT_FMT_EMAIL;
 372         rev.verbose_header = 1;
 373         rev.diff = 1;
 374         rev.combine_merges = 0;
 375         rev.ignore_merges = 1;
 376         rev.diffopt.msg_sep = "";
 377         rev.diffopt.recursive = 1;
 378
 379         rev.extra_headers = extra_headers;
 380
 381         /*
 382          * Parse the arguments before setup_revisions(), or something
 383          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 384          * possibly a valid SHA1.
 385          */
 386         for (i = 1, j = 1; i < argc; i++) {
 387                 if (!strcmp(argv[i], "--stdout"))
 388                         use_stdout = 1;
 389                 else if (!strcmp(argv[i], "-n") ||
 390                                 !strcmp(argv[i], "--numbered"))
 391                         numbered = 1;
 392                 else if (!strncmp(argv[i], "--start-number=", 15))
 393                         start_number = strtol(argv[i] + 15, NULL, 10);
 394                 else if (!strcmp(argv[i], "--start-number")) {
 395                         i++;
 396                         if (i == argc)
 397                                 die("Need a number for --start-number");
 398                         start_number = strtol(argv[i], NULL, 10);
 399                 }
 400                 else if (!strcmp(argv[i], "-k") ||
 401                                 !strcmp(argv[i], "--keep-subject")) {
 402                         keep_subject = 1;
 403                         rev.total = -1;
 404                 }
 405                 else if (!strcmp(argv[i], "--output-directory") ||
 406                          !strcmp(argv[i], "-o")) {
 407                         i++;
 408                         if (argc <= i)
 409                                 die("Which directory?");
 410                         if (output_directory)
 411                                 die("Two output directories?");
 412                         output_directory = argv[i];
 413                 }
 414                 else if (!strcmp(argv[i], "--signoff") ||
 415                          !strcmp(argv[i], "-s")) {
 416                         const char *committer;
 417                         const char *endpos;
 418                         committer = git_committer_info(1);
 419                         endpos = strchr(committer, '>');
 420                         if (!endpos)
 421                                 die("bogos committer info %s\n", committer);
 422                         add_signoff = xmalloc(endpos - committer + 2);
 423                         memcpy(add_signoff, committer, endpos - committer + 1);
 424                         add_signoff[endpos - committer + 1] = 0;
 425                 }
 426                 else if (!strcmp(argv[i], "--attach"))
 427                         rev.mime_boundary = git_version_string;
 428                 else if (!strncmp(argv[i], "--attach=", 9))
 429                         rev.mime_boundary = argv[i] + 9;
 430                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 431                         ignore_if_in_upstream = 1;
 432                 else if (!strcmp(argv[i], "--thread"))
 433                         thread = 1;
 434                 else if (!strncmp(argv[i], "--in-reply-to=", 14))
 435                         in_reply_to = argv[i] + 14;
 436                 else if (!strcmp(argv[i], "--in-reply-to")) {
 437                         i++;
 438                         if (i == argc)
 439                                 die("Need a Message-Id for --in-reply-to");
 440                         in_reply_to = argv[i];
 441                 }
 442                 else
 443                         argv[j++] = argv[i];
 444         }
 445         argc = j;
 446
 447         if (start_number < 0)
 448                 start_number = 1;
 449         if (numbered && keep_subject)
 450                 die ("-n and -k are mutually exclusive.");
 451
 452         argc = setup_revisions(argc, argv, &rev, "HEAD");
 453         if (argc > 1)
 454                 die ("unrecognized argument: %s", argv[1]);
 455
 456         if (!rev.diffopt.output_format)
 457                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 458
 459         if (!output_directory)
 460                 output_directory = prefix;
 461
 462         if (output_directory) {
 463                 if (use_stdout)
 464                         die("standard output, or directory, which one?");
 465                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 466                         die("Could not create directory %s",
 467                             output_directory);
 468         }
 469
 470         if (rev.pending.nr == 1) {
 471                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 472                 add_head(&rev);
 473         }
 474
 475         if (ignore_if_in_upstream)
 476                 get_patch_ids(&rev, &patch_id_opts, prefix);
 477
 478         if (!use_stdout)
 479                 realstdout = fdopen(dup(1), "w");
 480
 481         prepare_revision_walk(&rev);
 482         while ((commit = get_revision(&rev)) != NULL) {
 483                 unsigned char sha1[20];
 484
 485                 /* ignore merges */
 486                 if (commit->parents && commit->parents->next)
 487                         continue;
 488
 489                 if (ignore_if_in_upstream &&
 490                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 491                                 lookup_object(sha1))
 492                         continue;
 493
 494                 nr++;
 495                 list = xrealloc(list, nr * sizeof(list[0]));
 496                 list[nr - 1] = commit;
 497         }
 498         total = nr;
 499         if (numbered)
 500                 rev.total = total + start_number - 1;
 501         rev.add_signoff = add_signoff;
 502         rev.ref_message_id = in_reply_to;
 503         while (0 <= --nr) {
 504                 int shown;
 505                 commit = list[nr];
 506                 rev.nr = total - nr + (start_number - 1);
 507                 /* Make the second and subsequent mails replies to the first */
 508                 if (thread) {
 509                         if (nr == (total - 2)) {
 510                                 strncpy(ref_message_id, message_id,
 511                                         sizeof(ref_message_id));
 512                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 513                                 rev.ref_message_id = ref_message_id;
 514                         }
 515                         gen_message_id(message_id, sizeof(message_id),
 516                                        sha1_to_hex(commit->object.sha1));
 517                         rev.message_id = message_id;
 518                 }
 519                 if (!use_stdout)
 520                         reopen_stdout(commit, rev.nr, keep_subject);
 521                 shown = log_tree_commit(&rev, commit);
 522                 free(commit->buffer);
 523                 commit->buffer = NULL;
 524
 525                 /* We put one extra blank line between formatted
 526                  * patches and this flag is used by log-tree code
 527                  * to see if it needs to emit a LF before showing
 528                  * the log; when using one file per patch, we do
 529                  * not want the extra blank line.
 530                  */
 531                 if (!use_stdout)
 532                         rev.shown_one = 0;
 533                 if (shown) {
 534                         if (rev.mime_boundary)
 535                                 printf("\n--%s%s--\n\n\n",
 536                                        mime_boundary_leader,
 537                                        rev.mime_boundary);
 538                         else
 539                                 printf("-- \n%s\n\n", git_version_string);
 540                 }
 541                 if (!use_stdout)
 542                         fclose(stdout);
 543         }
 544         free(list);
 545         return 0;
 546 }
 547
 548 static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 549 {
 550         unsigned char sha1[20];
 551         if (get_sha1(arg, sha1) == 0) {
 552                 struct commit *commit = lookup_commit_reference(sha1);
 553                 if (commit) {
 554                         commit->object.flags |= flags;
 555                         add_pending_object(revs, &commit->object, arg);
 556                         return 0;
 557                 }
 558         }
 559         return -1;
 560 }
 561
 562 static const char cherry_usage[] =
 563 "git-cherry [-v] <upstream> [<head>] [<limit>]";
 564 int cmd_cherry(int argc, const char **argv, const char *prefix)
 565 {
 566         struct rev_info revs;
 567         struct diff_options patch_id_opts;
 568         struct commit *commit;
 569         struct commit_list *list = NULL;
 570         const char *upstream;
 571         const char *head = "HEAD";
 572         const char *limit = NULL;
 573         int verbose = 0;
 574
 575         if (argc > 1 && !strcmp(argv[1], "-v")) {
 576                 verbose = 1;
 577                 argc--;
 578                 argv++;
 579         }
 580
 581         switch (argc) {
 582         case 4:
 583                 limit = argv[3];
 584                 /* FALLTHROUGH */
 585         case 3:
 586                 head = argv[2];
 587                 /* FALLTHROUGH */
 588         case 2:
 589                 upstream = argv[1];
 590                 break;
 591         default:
 592                 usage(cherry_usage);
 593         }
 594
 595         init_revisions(&revs, prefix);
 596         revs.diff = 1;
 597         revs.combine_merges = 0;
 598         revs.ignore_merges = 1;
 599         revs.diffopt.recursive = 1;
 600
 601         if (add_pending_commit(head, &revs, 0))
 602                 die("Unknown commit %s", head);
 603         if (add_pending_commit(upstream, &revs, UNINTERESTING))
 604                 die("Unknown commit %s", upstream);
 605
 606         /* Don't say anything if head and upstream are the same. */
 607         if (revs.pending.nr == 2) {
 608                 struct object_array_entry *o = revs.pending.objects;
 609                 if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 610                         return 0;
 611         }
 612
 613         get_patch_ids(&revs, &patch_id_opts, prefix);
 614
 615         if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 616                 die("Unknown commit %s", limit);
 617
 618         /* reverse the list of commits */
 619         prepare_revision_walk(&revs);
 620         while ((commit = get_revision(&revs)) != NULL) {
 621                 /* ignore merges */
 622                 if (commit->parents && commit->parents->next)
 623                         continue;
 624
 625                 commit_list_insert(commit, &list);
 626         }
 627
 628         while (list) {
 629                 unsigned char sha1[20];
 630                 char sign = '+';
 631
 632                 commit = list->item;
 633                 if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 634                     lookup_object(sha1))
 635                         sign = '-';
 636
 637                 if (verbose) {
 638                         static char buf[16384];
 639                         pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 640                                             buf, sizeof(buf), 0, NULL, NULL, 0);
 641                         printf("%c %s %s\n", sign,
 642                                sha1_to_hex(commit->object.sha1), buf);
 643                 }
 644                 else {
 645                         printf("%c %s\n", sign,
 646                                sha1_to_hex(commit->object.sha1));
 647                 }
 648
 649                 list = list->next;
 650         }
 651
 652         return 0;
 653 }