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 <time.h>
  14 #include <sys/time.h>
  15
  16 static int default_show_root = 1;
  17
  18 /* this is in builtin-diff.c */
  19 void add_head(struct rev_info *revs);
  20
  21 static void cmd_log_init(int argc, const char **argv, const char *prefix,
  22                       struct rev_info *rev)
  23 {
  24         rev->abbrev = DEFAULT_ABBREV;
  25         rev->commit_format = CMIT_FMT_DEFAULT;
  26         rev->verbose_header = 1;
  27         rev->show_root_diff = default_show_root;
  28         argc = setup_revisions(argc, argv, rev, "HEAD");
  29         if (rev->diffopt.pickaxe || rev->diffopt.filter)
  30                 rev->always_show_header = 0;
  31         if (argc > 1)
  32                 die("unrecognized argument: %s", argv[1]);
  33 }
  34
  35 static int cmd_log_walk(struct rev_info *rev)
  36 {
  37         struct commit *commit;
  38
  39         prepare_revision_walk(rev);
  40         while ((commit = get_revision(rev)) != NULL) {
  41                 log_tree_commit(rev, commit);
  42                 free(commit->buffer);
  43                 commit->buffer = NULL;
  44                 free_commit_list(commit->parents);
  45                 commit->parents = NULL;
  46         }
  47         return 0;
  48 }
  49
  50 static int git_log_config(const char *var, const char *value)
  51 {
  52         if (!strcmp(var, "log.showroot")) {
  53                 default_show_root = git_config_bool(var, value);
  54                 return 0;
  55         }
  56         return git_diff_ui_config(var, value);
  57 }
  58
  59 int cmd_whatchanged(int argc, const char **argv, const char *prefix)
  60 {
  61         struct rev_info rev;
  62
  63         git_config(git_log_config);
  64         init_revisions(&rev, prefix);
  65         rev.diff = 1;
  66         rev.diffopt.recursive = 1;
  67         rev.simplify_history = 0;
  68         cmd_log_init(argc, argv, prefix, &rev);
  69         if (!rev.diffopt.output_format)
  70                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
  71         return cmd_log_walk(&rev);
  72 }
  73
  74 int cmd_show(int argc, const char **argv, const char *prefix)
  75 {
  76         struct rev_info rev;
  77
  78         git_config(git_log_config);
  79         init_revisions(&rev, prefix);
  80         rev.diff = 1;
  81         rev.diffopt.recursive = 1;
  82         rev.combine_merges = 1;
  83         rev.dense_combined_merges = 1;
  84         rev.always_show_header = 1;
  85         rev.ignore_merges = 0;
  86         rev.no_walk = 1;
  87         cmd_log_init(argc, argv, prefix, &rev);
  88         return cmd_log_walk(&rev);
  89 }
  90
  91 int cmd_log(int argc, const char **argv, const char *prefix)
  92 {
  93         struct rev_info rev;
  94
  95         git_config(git_log_config);
  96         init_revisions(&rev, prefix);
  97         rev.always_show_header = 1;
  98         cmd_log_init(argc, argv, prefix, &rev);
  99         return cmd_log_walk(&rev);
 100 }
 101
 102 static int istitlechar(char c)
 103 {
 104         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 105                 (c >= '0' && c <= '9') || c == '.' || c == '_';
 106 }
 107
 108 static char *extra_headers = NULL;
 109 static int extra_headers_size = 0;
 110
 111 static int git_format_config(const char *var, const char *value)
 112 {
 113         if (!strcmp(var, "format.headers")) {
 114                 int len = strlen(value);
 115                 extra_headers_size += len + 1;
 116                 extra_headers = xrealloc(extra_headers, extra_headers_size);
 117                 extra_headers[extra_headers_size - len - 1] = 0;
 118                 strcat(extra_headers, value);
 119                 return 0;
 120         }
 121         if (!strcmp(var, "diff.color")) {
 122                 return 0;
 123         }
 124         return git_log_config(var, value);
 125 }
 126
 127
 128 static FILE *realstdout = NULL;
 129 static const char *output_directory = NULL;
 130
 131 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 132 {
 133         char filename[1024];
 134         char *sol;
 135         int len = 0;
 136
 137         if (output_directory) {
 138                 strlcpy(filename, output_directory, 1010);
 139                 len = strlen(filename);
 140                 if (filename[len - 1] != '/')
 141                         filename[len++] = '/';
 142         }
 143
 144         sprintf(filename + len, "%04d", nr);
 145         len = strlen(filename);
 146
 147         sol = strstr(commit->buffer, "\n\n");
 148         if (sol) {
 149                 int j, space = 1;
 150
 151                 sol += 2;
 152                 /* strip [PATCH] or [PATCH blabla] */
 153                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 154                         char *eos = strchr(sol + 6, ']');
 155                         if (eos) {
 156                                 while (isspace(*eos))
 157                                         eos++;
 158                                 sol = eos;
 159                         }
 160                 }
 161
 162                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 163                         if (istitlechar(sol[j])) {
 164                                 if (space) {
 165                                         filename[len++] = '-';
 166                                         space = 0;
 167                                 }
 168                                 filename[len++] = sol[j];
 169                                 if (sol[j] == '.')
 170                                         while (sol[j + 1] == '.')
 171                                                 j++;
 172                         } else
 173                                 space = 1;
 174                 }
 175                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 176                         len--;
 177         }
 178         strcpy(filename + len, ".txt");
 179         fprintf(realstdout, "%s\n", filename);
 180         freopen(filename, "w", stdout);
 181 }
 182
 183 static int get_patch_id(struct commit *commit, struct diff_options *options,
 184                 unsigned char *sha1)
 185 {
 186         if (commit->parents)
 187                 diff_tree_sha1(commit->parents->item->object.sha1,
 188                                commit->object.sha1, "", options);
 189         else
 190                 diff_root_tree_sha1(commit->object.sha1, "", options);
 191         diffcore_std(options);
 192         return diff_flush_patch_id(options, sha1);
 193 }
 194
 195 static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
 196 {
 197         struct rev_info check_rev;
 198         struct commit *commit;
 199         struct object *o1, *o2;
 200         unsigned flags1, flags2;
 201         unsigned char sha1[20];
 202
 203         if (rev->pending.nr != 2)
 204                 die("Need exactly one range.");
 205
 206         o1 = rev->pending.objects[0].item;
 207         flags1 = o1->flags;
 208         o2 = rev->pending.objects[1].item;
 209         flags2 = o2->flags;
 210
 211         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 212                 die("Not a range.");
 213
 214         diff_setup(options);
 215         options->recursive = 1;
 216         if (diff_setup_done(options) < 0)
 217                 die("diff_setup_done failed");
 218
 219         /* given a range a..b get all patch ids for b..a */
 220         init_revisions(&check_rev, prefix);
 221         o1->flags ^= UNINTERESTING;
 222         o2->flags ^= UNINTERESTING;
 223         add_pending_object(&check_rev, o1, "o1");
 224         add_pending_object(&check_rev, o2, "o2");
 225         prepare_revision_walk(&check_rev);
 226
 227         while ((commit = get_revision(&check_rev)) != NULL) {
 228                 /* ignore merges */
 229                 if (commit->parents && commit->parents->next)
 230                         continue;
 231
 232                 if (!get_patch_id(commit, options, sha1))
 233                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 234         }
 235
 236         /* reset for next revision walk */
 237         clear_commit_marks((struct commit *)o1,
 238                         SEEN | UNINTERESTING | SHOWN | ADDED);
 239         clear_commit_marks((struct commit *)o2,
 240                         SEEN | UNINTERESTING | SHOWN | ADDED);
 241         o1->flags = flags1;
 242         o2->flags = flags2;
 243 }
 244
 245 static void gen_message_id(char *dest, unsigned int length, char *base)
 246 {
 247         const char *committer = git_committer_info(1);
 248         const char *email_start = strrchr(committer, '<');
 249         const char *email_end = strrchr(committer, '>');
 250         if(!email_start || !email_end || email_start > email_end - 1)
 251                 die("Could not extract email from committer identity.");
 252         snprintf(dest, length, "%s.%lu.git.%.*s", base,
 253                  (unsigned long) time(NULL),
 254                  (int)(email_end - email_start - 1), email_start + 1);
 255 }
 256
 257 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 258 {
 259         struct commit *commit;
 260         struct commit **list = NULL;
 261         struct rev_info rev;
 262         int nr = 0, total, i, j;
 263         int use_stdout = 0;
 264         int numbered = 0;
 265         int start_number = -1;
 266         int keep_subject = 0;
 267         int ignore_if_in_upstream = 0;
 268         int thread = 0;
 269         const char *in_reply_to = NULL;
 270         struct diff_options patch_id_opts;
 271         char *add_signoff = NULL;
 272         char message_id[1024];
 273         char ref_message_id[1024];
 274
 275         setup_ident();
 276         git_config(git_format_config);
 277         init_revisions(&rev, prefix);
 278         rev.commit_format = CMIT_FMT_EMAIL;
 279         rev.verbose_header = 1;
 280         rev.diff = 1;
 281         rev.combine_merges = 0;
 282         rev.ignore_merges = 1;
 283         rev.diffopt.msg_sep = "";
 284         rev.diffopt.recursive = 1;
 285
 286         rev.extra_headers = extra_headers;
 287
 288         /*
 289          * Parse the arguments before setup_revisions(), or something
 290          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 291          * possibly a valid SHA1.
 292          */
 293         for (i = 1, j = 1; i < argc; i++) {
 294                 if (!strcmp(argv[i], "--stdout"))
 295                         use_stdout = 1;
 296                 else if (!strcmp(argv[i], "-n") ||
 297                                 !strcmp(argv[i], "--numbered"))
 298                         numbered = 1;
 299                 else if (!strncmp(argv[i], "--start-number=", 15))
 300                         start_number = strtol(argv[i] + 15, NULL, 10);
 301                 else if (!strcmp(argv[i], "--start-number")) {
 302                         i++;
 303                         if (i == argc)
 304                                 die("Need a number for --start-number");
 305                         start_number = strtol(argv[i], NULL, 10);
 306                 }
 307                 else if (!strcmp(argv[i], "-k") ||
 308                                 !strcmp(argv[i], "--keep-subject")) {
 309                         keep_subject = 1;
 310                         rev.total = -1;
 311                 }
 312                 else if (!strcmp(argv[i], "--output-directory") ||
 313                          !strcmp(argv[i], "-o")) {
 314                         i++;
 315                         if (argc <= i)
 316                                 die("Which directory?");
 317                         if (output_directory)
 318                                 die("Two output directories?");
 319                         output_directory = argv[i];
 320                 }
 321                 else if (!strcmp(argv[i], "--signoff") ||
 322                          !strcmp(argv[i], "-s")) {
 323                         const char *committer;
 324                         const char *endpos;
 325                         committer = git_committer_info(1);
 326                         endpos = strchr(committer, '>');
 327                         if (!endpos)
 328                                 die("bogos committer info %s\n", committer);
 329                         add_signoff = xmalloc(endpos - committer + 2);
 330                         memcpy(add_signoff, committer, endpos - committer + 1);
 331                         add_signoff[endpos - committer + 1] = 0;
 332                 }
 333                 else if (!strcmp(argv[i], "--attach"))
 334                         rev.mime_boundary = git_version_string;
 335                 else if (!strncmp(argv[i], "--attach=", 9))
 336                         rev.mime_boundary = argv[i] + 9;
 337                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 338                         ignore_if_in_upstream = 1;
 339                 else if (!strcmp(argv[i], "--thread"))
 340                         thread = 1;
 341                 else if (!strncmp(argv[i], "--in-reply-to=", 14))
 342                         in_reply_to = argv[i] + 14;
 343                 else if (!strcmp(argv[i], "--in-reply-to")) {
 344                         i++;
 345                         if (i == argc)
 346                                 die("Need a Message-Id for --in-reply-to");
 347                         in_reply_to = argv[i];
 348                 }
 349                 else
 350                         argv[j++] = argv[i];
 351         }
 352         argc = j;
 353
 354         if (start_number < 0)
 355                 start_number = 1;
 356         if (numbered && keep_subject)
 357                 die ("-n and -k are mutually exclusive.");
 358
 359         argc = setup_revisions(argc, argv, &rev, "HEAD");
 360         if (argc > 1)
 361                 die ("unrecognized argument: %s", argv[1]);
 362
 363         if (!rev.diffopt.output_format)
 364                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 365
 366         if (!output_directory)
 367                 output_directory = prefix;
 368
 369         if (output_directory) {
 370                 if (use_stdout)
 371                         die("standard output, or directory, which one?");
 372                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 373                         die("Could not create directory %s",
 374                             output_directory);
 375         }
 376
 377         if (rev.pending.nr == 1) {
 378                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 379                 add_head(&rev);
 380         }
 381
 382         if (ignore_if_in_upstream)
 383                 get_patch_ids(&rev, &patch_id_opts, prefix);
 384
 385         if (!use_stdout)
 386                 realstdout = fdopen(dup(1), "w");
 387
 388         prepare_revision_walk(&rev);
 389         while ((commit = get_revision(&rev)) != NULL) {
 390                 unsigned char sha1[20];
 391
 392                 /* ignore merges */
 393                 if (commit->parents && commit->parents->next)
 394                         continue;
 395
 396                 if (ignore_if_in_upstream &&
 397                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 398                                 lookup_object(sha1))
 399                         continue;
 400
 401                 nr++;
 402                 list = xrealloc(list, nr * sizeof(list[0]));
 403                 list[nr - 1] = commit;
 404         }
 405         total = nr;
 406         if (numbered)
 407                 rev.total = total + start_number - 1;
 408         rev.add_signoff = add_signoff;
 409         rev.ref_message_id = in_reply_to;
 410         while (0 <= --nr) {
 411                 int shown;
 412                 commit = list[nr];
 413                 rev.nr = total - nr + (start_number - 1);
 414                 /* Make the second and subsequent mails replies to the first */
 415                 if (thread) {
 416                         if (nr == (total - 2)) {
 417                                 strncpy(ref_message_id, message_id,
 418                                         sizeof(ref_message_id));
 419                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 420                                 rev.ref_message_id = ref_message_id;
 421                         }
 422                         gen_message_id(message_id, sizeof(message_id),
 423                                        sha1_to_hex(commit->object.sha1));
 424                         rev.message_id = message_id;
 425                 }
 426                 if (!use_stdout)
 427                         reopen_stdout(commit, rev.nr, keep_subject);
 428                 shown = log_tree_commit(&rev, commit);
 429                 free(commit->buffer);
 430                 commit->buffer = NULL;
 431
 432                 /* We put one extra blank line between formatted
 433                  * patches and this flag is used by log-tree code
 434                  * to see if it needs to emit a LF before showing
 435                  * the log; when using one file per patch, we do
 436                  * not want the extra blank line.
 437                  */
 438                 if (!use_stdout)
 439                         rev.shown_one = 0;
 440                 if (shown) {
 441                         if (rev.mime_boundary)
 442                                 printf("\n--%s%s--\n\n\n",
 443                                        mime_boundary_leader,
 444                                        rev.mime_boundary);
 445                         else
 446                                 printf("-- \n%s\n\n", git_version_string);
 447                 }
 448                 if (!use_stdout)
 449                         fclose(stdout);
 450         }
 451         free(list);
 452         return 0;
 453 }
 454
 455 static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
 456 {
 457         unsigned char sha1[20];
 458         if (get_sha1(arg, sha1) == 0) {
 459                 struct commit *commit = lookup_commit_reference(sha1);
 460                 if (commit) {
 461                         commit->object.flags |= flags;
 462                         add_pending_object(revs, &commit->object, arg);
 463                         return 0;
 464                 }
 465         }
 466         return -1;
 467 }
 468
 469 static const char cherry_usage[] =
 470 "git-cherry [-v] <upstream> [<head>] [<limit>]";
 471 int cmd_cherry(int argc, const char **argv, const char *prefix)
 472 {
 473         struct rev_info revs;
 474         struct diff_options patch_id_opts;
 475         struct commit *commit;
 476         struct commit_list *list = NULL;
 477         const char *upstream;
 478         const char *head = "HEAD";
 479         const char *limit = NULL;
 480         int verbose = 0;
 481
 482         if (argc > 1 && !strcmp(argv[1], "-v")) {
 483                 verbose = 1;
 484                 argc--;
 485                 argv++;
 486         }
 487
 488         switch (argc) {
 489         case 4:
 490                 limit = argv[3];
 491                 /* FALLTHROUGH */
 492         case 3:
 493                 head = argv[2];
 494                 /* FALLTHROUGH */
 495         case 2:
 496                 upstream = argv[1];
 497                 break;
 498         default:
 499                 usage(cherry_usage);
 500         }
 501
 502         init_revisions(&revs, prefix);
 503         revs.diff = 1;
 504         revs.combine_merges = 0;
 505         revs.ignore_merges = 1;
 506         revs.diffopt.recursive = 1;
 507
 508         if (add_pending_commit(head, &revs, 0))
 509                 die("Unknown commit %s", head);
 510         if (add_pending_commit(upstream, &revs, UNINTERESTING))
 511                 die("Unknown commit %s", upstream);
 512
 513         /* Don't say anything if head and upstream are the same. */
 514         if (revs.pending.nr == 2) {
 515                 struct object_array_entry *o = revs.pending.objects;
 516                 if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
 517                         return 0;
 518         }
 519
 520         get_patch_ids(&revs, &patch_id_opts, prefix);
 521
 522         if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
 523                 die("Unknown commit %s", limit);
 524
 525         /* reverse the list of commits */
 526         prepare_revision_walk(&revs);
 527         while ((commit = get_revision(&revs)) != NULL) {
 528                 /* ignore merges */
 529                 if (commit->parents && commit->parents->next)
 530                         continue;
 531
 532                 commit_list_insert(commit, &list);
 533         }
 534
 535         while (list) {
 536                 unsigned char sha1[20];
 537                 char sign = '+';
 538
 539                 commit = list->item;
 540                 if (!get_patch_id(commit, &patch_id_opts, sha1) &&
 541                     lookup_object(sha1))
 542                         sign = '-';
 543
 544                 if (verbose) {
 545                         static char buf[16384];
 546                         pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 547                                             buf, sizeof(buf), 0, NULL, NULL, 0);
 548                         printf("%c %s %s\n", sign,
 549                                sha1_to_hex(commit->object.sha1), buf);
 550                 }
 551                 else {
 552                         printf("%c %s\n", sign,
 553                                sha1_to_hex(commit->object.sha1));
 554                 }
 555
 556                 list = list->next;
 557         }
 558
 559         return 0;
 560 }