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 (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
  46 static 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
  61 static 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
  70 int 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
  85 static 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
 109 static 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
 117 int 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
 181 int 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
 192 static int istitlechar(char c)
 193 {
 194         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 195                 (c >= '0' && c <= '9') || c == '.' || c == '_';
 196 }
 197
 198 static char *extra_headers = NULL;
 199 static int extra_headers_size = 0;
 200
 201 static 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
 218 static FILE *realstdout = NULL;
 219 static const char *output_directory = NULL;
 220
 221 static 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
 273 static 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
 285 static 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
 335 static 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
 347 int 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
 545 static 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
 559 static const char cherry_usage[] =
 560 "git-cherry [-v] <upstream> [<head>] [<limit>]";
 561 int 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 }