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