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                 if (!rev->reflog_info) {
  54                         /* we allow cycles in reflog ancestry */
  55                         free(commit->buffer);
  56                         commit->buffer = NULL;
  57                 }
  58                 free_commit_list(commit->parents);
  59                 commit->parents = NULL;
  60         }
  61         return 0;
  62 }
  63
  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 static const char *fmt_patch_suffix = ".patch";
 204
 205 static int git_format_config(const char *var, const char *value)
 206 {
 207         if (!strcmp(var, "format.headers")) {
 208                 int len;
 209
 210                 if (!value)
 211                         die("format.headers without value");
 212                 len = strlen(value);
 213                 extra_headers_size += len + 1;
 214                 extra_headers = xrealloc(extra_headers, extra_headers_size);
 215                 extra_headers[extra_headers_size - len - 1] = 0;
 216                 strcat(extra_headers, value);
 217                 return 0;
 218         }
 219         if (!strcmp(var, "format.suffix")) {
 220                 if (!value)
 221                         die("format.suffix without value");
 222                 fmt_patch_suffix = xstrdup(value);
 223                 return 0;
 224         }
 225         if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
 226                 return 0;
 227         }
 228         return git_log_config(var, value);
 229 }
 230
 231
 232 static FILE *realstdout = NULL;
 233 static const char *output_directory = NULL;
 234
 235 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 236 {
 237         char filename[1024];
 238         char *sol;
 239         int len = 0;
 240         int suffix_len = strlen(fmt_patch_suffix) + 10; /* ., NUL and slop */
 241
 242         if (output_directory) {
 243                 strlcpy(filename, output_directory, 1000);
 244                 len = strlen(filename);
 245                 if (filename[len - 1] != '/')
 246                         filename[len++] = '/';
 247         }
 248
 249         sprintf(filename + len, "%04d", nr);
 250         len = strlen(filename);
 251
 252         sol = strstr(commit->buffer, "\n\n");
 253         if (sol) {
 254                 int j, space = 1;
 255
 256                 sol += 2;
 257                 /* strip [PATCH] or [PATCH blabla] */
 258                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 259                         char *eos = strchr(sol + 6, ']');
 260                         if (eos) {
 261                                 while (isspace(*eos))
 262                                         eos++;
 263                                 sol = eos;
 264                         }
 265                 }
 266
 267                 for (j = 0;
 268                      len < sizeof(filename) - suffix_len &&
 269                              sol[j] && sol[j] != '\n';
 270                      j++) {
 271                         if (istitlechar(sol[j])) {
 272                                 if (space) {
 273                                         filename[len++] = '-';
 274                                         space = 0;
 275                                 }
 276                                 filename[len++] = sol[j];
 277                                 if (sol[j] == '.')
 278                                         while (sol[j + 1] == '.')
 279                                                 j++;
 280                         } else
 281                                 space = 1;
 282                 }
 283                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 284                         len--;
 285         }
 286         strcpy(filename + len, fmt_patch_suffix);
 287         fprintf(realstdout, "%s\n", filename);
 288         freopen(filename, "w", stdout);
 289 }
 290
 291 static int get_patch_id(struct commit *commit, struct diff_options *options,
 292                 unsigned char *sha1)
 293 {
 294         if (commit->parents)
 295                 diff_tree_sha1(commit->parents->item->object.sha1,
 296                                commit->object.sha1, "", options);
 297         else
 298                 diff_root_tree_sha1(commit->object.sha1, "", options);
 299         diffcore_std(options);
 300         return diff_flush_patch_id(options, sha1);
 301 }
 302
 303 static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 304 {
 305         struct rev_info check_rev;
 306         struct commit *commit;
 307         struct object *o1, *o2;
 308         unsigned flags1, flags2;
 309         unsigned char sha1[20];
 310
 311         if (rev->pending.nr != 2)
 312                 die("Need exactly one range.");
 313
 314         o1 = rev->pending.objects[0].item;
 315         flags1 = o1->flags;
 316         o2 = rev->pending.objects[1].item;
 317         flags2 = o2->flags;
 318
 319         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 320                 die("Not a range.");
 321
 322         diff_setup(options);
 323         options->recursive = 1;
 324         if (diff_setup_done(options) < 0)
 325                 die("diff_setup_done failed");
 326
 327         /* given a range a..b get all patch ids for b..a */
 328         init_revisions(&check_rev, prefix);
 329         o1->flags ^= UNINTERESTING;
 330         o2->flags ^= UNINTERESTING;
 331         add_pending_object(&check_rev, o1, "o1");
 332         add_pending_object(&check_rev, o2, "o2");
 333         prepare_revision_walk(&check_rev);
 334
 335         while ((commit = get_revision(&check_rev)) != NULL) {
 336                 /* ignore merges */
 337                 if (commit->parents && commit->parents->next)
 338                         continue;
 339
 340                 if (!get_patch_id(commit, options, sha1))
 341                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 342         }
 343
 344         /* reset for next revision walk */
 345         clear_commit_marks((struct commit *)o1,
 346                         SEEN | UNINTERESTING | SHOWN | ADDED);
 347         clear_commit_marks((struct commit *)o2,
 348                         SEEN | UNINTERESTING | SHOWN | ADDED);
 349         o1->flags = flags1;
 350         o2->flags = flags2;
 351 }
 352
 353 static void gen_message_id(char *dest, unsigned int length, char *base)
 354 {
 355         const char *committer = git_committer_info(1);
 356         const char *email_start = strrchr(committer, '<');
 357         const char *email_end = strrchr(committer, '>');
 358         if(!email_start || !email_end || email_start > email_end - 1)
 359                 die("Could not extract email from committer identity.");
 360         snprintf(dest, length, "%s.%lu.git.%.*s", base,
 361                  (unsigned long) time(NULL),
 362                  (int)(email_end - email_start - 1), email_start + 1);
 363 }
 364
 365 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 366 {
 367         struct commit *commit;
 368         struct commit **list = NULL;
 369         struct rev_info rev;
 370         int nr = 0, total, i, j;
 371         int use_stdout = 0;
 372         int numbered = 0;
 373         int start_number = -1;
 374         int keep_subject = 0;
 375         int ignore_if_in_upstream = 0;
 376         int thread = 0;
 377         const char *in_reply_to = NULL;
 378         struct diff_options patch_id_opts;
 379         char *add_signoff = NULL;
 380         char message_id[1024];
 381         char ref_message_id[1024];
 382
 383         setup_ident();
 384         git_config(git_format_config);
 385         init_revisions(&rev, prefix);
 386         rev.commit_format = CMIT_FMT_EMAIL;
 387         rev.verbose_header = 1;
 388         rev.diff = 1;
 389         rev.combine_merges = 0;
 390         rev.ignore_merges = 1;
 391         rev.diffopt.msg_sep = "";
 392         rev.diffopt.recursive = 1;
 393
 394         rev.extra_headers = extra_headers;
 395
 396         /*
 397          * Parse the arguments before setup_revisions(), or something
 398          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 399          * possibly a valid SHA1.
 400          */
 401         for (i = 1, j = 1; i < argc; i++) {
 402                 if (!strcmp(argv[i], "--stdout"))
 403                         use_stdout = 1;
 404                 else if (!strcmp(argv[i], "-n") ||
 405                                 !strcmp(argv[i], "--numbered"))
 406                         numbered = 1;
 407                 else if (!strncmp(argv[i], "--start-number=", 15))
 408                         start_number = strtol(argv[i] + 15, NULL, 10);
 409                 else if (!strcmp(argv[i], "--start-number")) {
 410                         i++;
 411                         if (i == argc)
 412                                 die("Need a number for --start-number");
 413                         start_number = strtol(argv[i], NULL, 10);
 414                 }
 415                 else if (!strcmp(argv[i], "-k") ||
 416                                 !strcmp(argv[i], "--keep-subject")) {
 417                         keep_subject = 1;
 418                         rev.total = -1;
 419                 }
 420                 else if (!strcmp(argv[i], "--output-directory") ||
 421                          !strcmp(argv[i], "-o")) {
 422                         i++;
 423                         if (argc <= i)
 424                                 die("Which directory?");
 425                         if (output_directory)
 426                                 die("Two output directories?");
 427                         output_directory = argv[i];
 428                 }
 429                 else if (!strcmp(argv[i], "--signoff") ||
 430                          !strcmp(argv[i], "-s")) {
 431                         const char *committer;
 432                         const char *endpos;
 433                         committer = git_committer_info(1);
 434                         endpos = strchr(committer, '>');
 435                         if (!endpos)
 436                                 die("bogos committer info %s\n", committer);
 437                         add_signoff = xmalloc(endpos - committer + 2);
 438                         memcpy(add_signoff, committer, endpos - committer + 1);
 439                         add_signoff[endpos - committer + 1] = 0;
 440                 }
 441                 else if (!strcmp(argv[i], "--attach"))
 442                         rev.mime_boundary = git_version_string;
 443                 else if (!strncmp(argv[i], "--attach=", 9))
 444                         rev.mime_boundary = argv[i] + 9;
 445                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 446                         ignore_if_in_upstream = 1;
 447                 else if (!strcmp(argv[i], "--thread"))
 448                         thread = 1;
 449                 else if (!strncmp(argv[i], "--in-reply-to=", 14))
 450                         in_reply_to = argv[i] + 14;
 451                 else if (!strcmp(argv[i], "--in-reply-to")) {
 452                         i++;
 453                         if (i == argc)
 454                                 die("Need a Message-Id for --in-reply-to");
 455                         in_reply_to = argv[i];
 456                 }
 457                 else if (!strncmp(argv[i], "--suffix=", 9))
 458                         fmt_patch_suffix = argv[i] + 9;
 459                 else
 460                         argv[j++] = argv[i];
 461         }
 462         argc = j;
 463
 464         if (start_number < 0)
 465                 start_number = 1;
 466         if (numbered && keep_subject)
 467                 die ("-n and -k are mutually exclusive.");
 468
 469         argc = setup_revisions(argc, argv, &rev, "HEAD");
 470         if (argc > 1)
 471                 die ("unrecognized argument: %s", argv[1]);
 472
 473         if (!rev.diffopt.output_format)
 474                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY | DIFF_FORMAT_PATCH;
 475
 476         if (!rev.diffopt.text)
 477                 rev.diffopt.binary = 1;
 478
 479         if (!output_directory && !use_stdout)
 480                 output_directory = prefix;
 481
 482         if (output_directory) {
 483                 if (use_stdout)
 484                         die("standard output, or directory, which one?");
 485                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 486                         die("Could not create directory %s",
 487                             output_directory);
 488         }
 489
 490         if (rev.pending.nr == 1) {
 491                 if (rev.max_count < 0) {
 492                         rev.pending.objects[0].item->flags |= UNINTERESTING;
 493                         add_head(&rev);
 494                 }
 495                 /* Otherwise, it is "format-patch -22 HEAD", and
 496                  * get_revision() would return only the specified count.
 497                  */
 498         }
 499
 500         if (ignore_if_in_upstream)
 501                 get_patch_ids(&rev, &patch_id_opts, prefix);
 502
 503         if (!use_stdout)
 504                 realstdout = fdopen(dup(1), "w");
 505
 506         prepare_revision_walk(&rev);
 507         while ((commit = get_revision(&rev)) != NULL) {
 508                 unsigned char sha1[20];
 509
 510                 /* ignore merges */
 511                 if (commit->parents && commit->parents->next)
 512                         continue;
 513
 514                 if (ignore_if_in_upstream &&
 515                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 516                                 lookup_object(sha1))
 517                         continue;
 518
 519                 nr++;
 520                 list = xrealloc(list, nr * sizeof(list[0]));
 521                 list[nr - 1] = commit;
 522         }
 523         total = nr;
 524         if (numbered)
 525                 rev.total = total + start_number - 1;
 526         rev.add_signoff = add_signoff;
 527         rev.ref_message_id = in_reply_to;
 528         while (0 <= --nr) {
 529                 int shown;
 530                 commit = list[nr];
 531                 rev.nr = total - nr + (start_number - 1);
 532                 /* Make the second and subsequent mails replies to the first */
 533                 if (thread) {
 534                         if (nr == (total - 2)) {
 535                                 strncpy(ref_message_id, message_id,
 536                                         sizeof(ref_message_id));
 537                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 538                                 rev.ref_message_id = ref_message_id;
 539                         }
 540                         gen_message_id(message_id, sizeof(message_id),
 541                                        sha1_to_hex(commit->object.sha1));
 542                         rev.message_id = message_id;
 543                 }
 544                 if (!use_stdout)
 545                         reopen_stdout(commit, rev.nr, keep_subject);
 546                 shown = log_tree_commit(&rev, commit);
 547                 free(commit->buffer);
 548                 commit->buffer = NULL;
 549
 550                 /* We put one extra blank line between formatted
 551                  * patches and this flag is used by log-tree code
 552                  * to see if it needs to emit a LF before showing
 553                  * the log; when using one file per patch, we do
 554                  * not want the extra blank line.
 555                  */
 556                 if (!use_stdout)
 557                         rev.shown_one = 0;
 558                 if (shown) {
 559                         if (rev.mime_boundary)
 560                                 printf("\n--%s%s--\n\n\n",
 561                                        mime_boundary_leader,
 562                                        rev.mime_boundary);
 563                         else
 564                                 printf("-- \n%s\n\n", git_version_string);
 565                 }
 566                 if (!use_stdout)
 567                         fclose(stdout);
 568         }
 569         free(list);
 570         return 0;
 571 }
 572
 573 static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 574 {
 575         unsigned char sha1[20];
 576         if (get_sha1(arg, sha1) == 0) {
 577                 struct commit *commit = lookup_commit_reference(sha1);
 578                 if (commit) {
 579                         commit->object.flags |= flags;
 580                         add_pending_object(revs, &commit->object, arg);
 581                         return 0;
 582                 }
 583         }
 584         return -1;
 585 }
 586
 587 static const char cherry_usage[] =
 588 "git-cherry [-v] <upstream> [<head>] [<limit>]";
 589 int cmd_cherry(int argc, const char **argv, const char *prefix)
 590 {
 591         struct rev_info revs;
 592         struct diff_options patch_id_opts;
 593         struct commit *commit;
 594         struct commit_list *list = NULL;
 595         const char *upstream;
 596         const char *head = "HEAD";
 597         const char *limit = NULL;
 598         int verbose = 0;
 599
 600         if (argc > 1 && !strcmp(argv[1], "-v")) {
 601                 verbose = 1;
 602                 argc--;
 603                 argv++;
 604         }
 605
 606         switch (argc) {
 607         case 4:
 608                 limit = argv[3];
 609                 /* FALLTHROUGH */
 610         case 3:
 611                 head = argv[2];
 612                 /* FALLTHROUGH */
 613         case 2:
 614                 upstream = argv[1];
 615                 break;
 616         default:
 617                 usage(cherry_usage);
 618         }
 619
 620         init_revisions(&revs, prefix);
 621         revs.diff = 1;
 622         revs.combine_merges = 0;
 623         revs.ignore_merges = 1;
 624         revs.diffopt.recursive = 1;
 625
 626         if (add_pending_commit(head, &revs, 0))
 627                 die("Unknown commit %s", head);
 628         if (add_pending_commit(upstream, &revs, UNINTERESTING))
 629                 die("Unknown commit %s", upstream);
 630
 631         /* Don't say anything if head and upstream are the same. */
 632         if (revs.pending.nr == 2) {
 633                 struct object_array_entry *o = revs.pending.objects;
 634                 if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 635                         return 0;
 636         }
 637
 638         get_patch_ids(&revs, &patch_id_opts, prefix);
 639
 640         if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 641                 die("Unknown commit %s", limit);
 642
 643         /* reverse the list of commits */
 644         prepare_revision_walk(&revs);
 645         while ((commit = get_revision(&revs)) != NULL) {
 646                 /* ignore merges */
 647                 if (commit->parents && commit->parents->next)
 648                         continue;
 649
 650                 commit_list_insert(commit, &list);
 651         }
 652
 653         while (list) {
 654                 unsigned char sha1[20];
 655                 char sign = '+';
 656
 657                 commit = list->item;
 658                 if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 659                     lookup_object(sha1))
 660                         sign = '-';
 661
 662                 if (verbose) {
 663                         static char buf[16384];
 664                         pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 665                                             buf, sizeof(buf), 0, NULL, NULL, 0);
 666                         printf("%c %s %s\n", sign,
 667                                sha1_to_hex(commit->object.sha1), buf);
 668                 }
 669                 else {
 670                         printf("%c %s\n", sign,
 671                                sha1_to_hex(commit->object.sha1));
 672                 }
 673
 674                 list = list->next;
 675         }
 676
 677         return 0;
 678 }