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 #include <time.h>
  15 #include <sys/time.h>
  16
  17 static int default_show_root = 1;
  18
  19 /* this is in builtin-diff.c */
  20 void add_head(struct rev_info *revs);
  21
  22 static 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
  36 static 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
  51 static 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
  60 int 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
  75 static 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
  99 static 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
 107 int 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
 171 int 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
 182 static int istitlechar(char c)
 183 {
 184         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 185                 (c >= '0' && c <= '9') || c == '.' || c == '_';
 186 }
 187
 188 static char *extra_headers = NULL;
 189 static int extra_headers_size = 0;
 190
 191 static 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
 208 static FILE *realstdout = NULL;
 209 static const char *output_directory = NULL;
 210
 211 static 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
 263 static 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
 275 static 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
 325 static 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
 337 int 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
 535 static 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
 549 static const char cherry_usage[] =
 550 "git-cherry [-v] <upstream> [<head>] [<limit>]";
 551 int 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 }