builtin/rev-list.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "commit.h"
   4 #include "diff.h"
   5 #include "revision.h"
   6 #include "list-objects.h"
   7 #include "list-objects-filter.h"
   8 #include "list-objects-filter-options.h"
   9 #include "object.h"
  10 #include "object-store.h"
  11 #include "pack.h"
  12 #include "pack-bitmap.h"
  13 #include "builtin.h"
  14 #include "log-tree.h"
  15 #include "graph.h"
  16 #include "bisect.h"
  17 #include "progress.h"
  18 #include "reflog-walk.h"
  19 #include "oidset.h"
  20 #include "packfile.h"
  21 #include "object-store.h"
  22
  23 static const char rev_list_usage[] =
  24 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
  25 "  limiting output:\n"
  26 "    --max-count=<n>\n"
  27 "    --max-age=<epoch>\n"
  28 "    --min-age=<epoch>\n"
  29 "    --sparse\n"
  30 "    --no-merges\n"
  31 "    --min-parents=<n>\n"
  32 "    --no-min-parents\n"
  33 "    --max-parents=<n>\n"
  34 "    --no-max-parents\n"
  35 "    --remove-empty\n"
  36 "    --all\n"
  37 "    --branches\n"
  38 "    --tags\n"
  39 "    --remotes\n"
  40 "    --stdin\n"
  41 "    --quiet\n"
  42 "  ordering output:\n"
  43 "    --topo-order\n"
  44 "    --date-order\n"
  45 "    --reverse\n"
  46 "  formatting output:\n"
  47 "    --parents\n"
  48 "    --children\n"
  49 "    --objects | --objects-edge\n"
  50 "    --unpacked\n"
  51 "    --header | --pretty\n"
  52 "    --[no-]object-names\n"
  53 "    --abbrev=<n> | --no-abbrev\n"
  54 "    --abbrev-commit\n"
  55 "    --left-right\n"
  56 "    --count\n"
  57 "  special purpose:\n"
  58 "    --bisect\n"
  59 "    --bisect-vars\n"
  60 "    --bisect-all"
  61 ;
  62
  63 static struct progress *progress;
  64 static unsigned progress_counter;
  65
  66 static struct list_objects_filter_options filter_options;
  67 static struct oidset omitted_objects;
  68 static int arg_print_omitted; /* print objects omitted by filter */
  69
  70 static struct oidset missing_objects;
  71 enum missing_action {
  72         MA_ERROR = 0,    /* fail if any missing objects are encountered */
  73         MA_ALLOW_ANY,    /* silently allow ALL missing objects */
  74         MA_PRINT,        /* print ALL missing objects in special section */
  75         MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
  76 };
  77 static enum missing_action arg_missing_action;
  78
  79 /* display only the oid of each object encountered */
  80 static int arg_show_object_names = 1;
  81
  82 #define DEFAULT_OIDSET_SIZE     (16*1024)
  83
  84 static void finish_commit(struct commit *commit);
  85 static void show_commit(struct commit *commit, void *data)
  86 {
  87         struct rev_list_info *info = data;
  88         struct rev_info *revs = info->revs;
  89
  90         display_progress(progress, ++progress_counter);
  91
  92         if (info->flags & REV_LIST_QUIET) {
  93                 finish_commit(commit);
  94                 return;
  95         }
  96
  97         graph_show_commit(revs->graph);
  98
  99         if (revs->count) {
 100                 if (commit->object.flags & PATCHSAME)
 101                         revs->count_same++;
 102                 else if (commit->object.flags & SYMMETRIC_LEFT)
 103                         revs->count_left++;
 104                 else
 105                         revs->count_right++;
 106                 finish_commit(commit);
 107                 return;
 108         }
 109
 110         if (info->show_timestamp)
 111                 printf("%"PRItime" ", commit->date);
 112         if (info->header_prefix)
 113                 fputs(info->header_prefix, stdout);
 114
 115         if (!revs->graph)
 116                 fputs(get_revision_mark(revs, commit), stdout);
 117         if (revs->abbrev_commit && revs->abbrev)
 118                 fputs(find_unique_abbrev(&commit->object.oid, revs->abbrev),
 119                       stdout);
 120         else
 121                 fputs(oid_to_hex(&commit->object.oid), stdout);
 122         if (revs->print_parents) {
 123                 struct commit_list *parents = commit->parents;
 124                 while (parents) {
 125                         printf(" %s", oid_to_hex(&parents->item->object.oid));
 126                         parents = parents->next;
 127                 }
 128         }
 129         if (revs->children.name) {
 130                 struct commit_list *children;
 131
 132                 children = lookup_decoration(&revs->children, &commit->object);
 133                 while (children) {
 134                         printf(" %s", oid_to_hex(&children->item->object.oid));
 135                         children = children->next;
 136                 }
 137         }
 138         show_decorations(revs, commit);
 139         if (revs->commit_format == CMIT_FMT_ONELINE)
 140                 putchar(' ');
 141         else
 142                 putchar('\n');
 143
 144         if (revs->verbose_header) {
 145                 struct strbuf buf = STRBUF_INIT;
 146                 struct pretty_print_context ctx = {0};
 147                 ctx.abbrev = revs->abbrev;
 148                 ctx.date_mode = revs->date_mode;
 149                 ctx.date_mode_explicit = revs->date_mode_explicit;
 150                 ctx.fmt = revs->commit_format;
 151                 ctx.output_encoding = get_log_output_encoding();
 152                 ctx.color = revs->diffopt.use_color;
 153                 pretty_print_commit(&ctx, commit, &buf);
 154                 if (buf.len) {
 155                         if (revs->commit_format != CMIT_FMT_ONELINE)
 156                                 graph_show_oneline(revs->graph);
 157
 158                         graph_show_commit_msg(revs->graph, stdout, &buf);
 159
 160                         /*
 161                          * Add a newline after the commit message.
 162                          *
 163                          * Usually, this newline produces a blank
 164                          * padding line between entries, in which case
 165                          * we need to add graph padding on this line.
 166                          *
 167                          * However, the commit message may not end in a
 168                          * newline.  In this case the newline simply
 169                          * ends the last line of the commit message,
 170                          * and we don't need any graph output.  (This
 171                          * always happens with CMIT_FMT_ONELINE, and it
 172                          * happens with CMIT_FMT_USERFORMAT when the
 173                          * format doesn't explicitly end in a newline.)
 174                          */
 175                         if (buf.len && buf.buf[buf.len - 1] == '\n')
 176                                 graph_show_padding(revs->graph);
 177                         putchar(info->hdr_termination);
 178                 } else {
 179                         /*
 180                          * If the message buffer is empty, just show
 181                          * the rest of the graph output for this
 182                          * commit.
 183                          */
 184                         if (graph_show_remainder(revs->graph))
 185                                 putchar('\n');
 186                         if (revs->commit_format == CMIT_FMT_ONELINE)
 187                                 putchar('\n');
 188                 }
 189                 strbuf_release(&buf);
 190         } else {
 191                 if (graph_show_remainder(revs->graph))
 192                         putchar('\n');
 193         }
 194         maybe_flush_or_die(stdout, "stdout");
 195         finish_commit(commit);
 196 }
 197
 198 static void finish_commit(struct commit *commit)
 199 {
 200         if (commit->parents) {
 201                 free_commit_list(commit->parents);
 202                 commit->parents = NULL;
 203         }
 204         free_commit_buffer(the_repository->parsed_objects,
 205                            commit);
 206 }
 207
 208 static inline void finish_object__ma(struct object *obj)
 209 {
 210         /*
 211          * Whether or not we try to dynamically fetch missing objects
 212          * from the server, we currently DO NOT have the object.  We
 213          * can either print, allow (ignore), or conditionally allow
 214          * (ignore) them.
 215          */
 216         switch (arg_missing_action) {
 217         case MA_ERROR:
 218                 die("missing %s object '%s'",
 219                     type_name(obj->type), oid_to_hex(&obj->oid));
 220                 return;
 221
 222         case MA_ALLOW_ANY:
 223                 return;
 224
 225         case MA_PRINT:
 226                 oidset_insert(&missing_objects, &obj->oid);
 227                 return;
 228
 229         case MA_ALLOW_PROMISOR:
 230                 if (is_promisor_object(&obj->oid))
 231                         return;
 232                 die("unexpected missing %s object '%s'",
 233                     type_name(obj->type), oid_to_hex(&obj->oid));
 234                 return;
 235
 236         default:
 237                 BUG("unhandled missing_action");
 238                 return;
 239         }
 240 }
 241
 242 static int finish_object(struct object *obj, const char *name, void *cb_data)
 243 {
 244         struct rev_list_info *info = cb_data;
 245         if (oid_object_info_extended(the_repository, &obj->oid, NULL, 0) < 0) {
 246                 finish_object__ma(obj);
 247                 return 1;
 248         }
 249         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 250                 parse_object(the_repository, &obj->oid);
 251         return 0;
 252 }
 253
 254 static void show_object(struct object *obj, const char *name, void *cb_data)
 255 {
 256         struct rev_list_info *info = cb_data;
 257         if (finish_object(obj, name, cb_data))
 258                 return;
 259         display_progress(progress, ++progress_counter);
 260         if (info->flags & REV_LIST_QUIET)
 261                 return;
 262         if (arg_show_object_names)
 263                 show_object_with_name(stdout, obj, name);
 264         else
 265                 printf("%s\n", oid_to_hex(&obj->oid));
 266 }
 267
 268 static void show_edge(struct commit *commit)
 269 {
 270         printf("-%s\n", oid_to_hex(&commit->object.oid));
 271 }
 272
 273 static void print_var_str(const char *var, const char *val)
 274 {
 275         printf("%s='%s'\n", var, val);
 276 }
 277
 278 static void print_var_int(const char *var, int val)
 279 {
 280         printf("%s=%d\n", var, val);
 281 }
 282
 283 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 284 {
 285         int cnt, flags = info->flags;
 286         char hex[GIT_MAX_HEXSZ + 1] = "";
 287         struct commit_list *tried;
 288         struct rev_info *revs = info->revs;
 289
 290         if (!revs->commits)
 291                 return 1;
 292
 293         revs->commits = filter_skipped(revs->commits, &tried,
 294                                        flags & BISECT_SHOW_ALL,
 295                                        NULL, NULL);
 296
 297         /*
 298          * revs->commits can reach "reaches" commits among
 299          * "all" commits.  If it is good, then there are
 300          * (all-reaches) commits left to be bisected.
 301          * On the other hand, if it is bad, then the set
 302          * to bisect is "reaches".
 303          * A bisect set of size N has (N-1) commits further
 304          * to test, as we already know one bad one.
 305          */
 306         cnt = all - reaches;
 307         if (cnt < reaches)
 308                 cnt = reaches;
 309
 310         if (revs->commits)
 311                 oid_to_hex_r(hex, &revs->commits->item->object.oid);
 312
 313         if (flags & BISECT_SHOW_ALL) {
 314                 traverse_commit_list(revs, show_commit, show_object, info);
 315                 printf("------\n");
 316         }
 317
 318         print_var_str("bisect_rev", hex);
 319         print_var_int("bisect_nr", cnt - 1);
 320         print_var_int("bisect_good", all - reaches - 1);
 321         print_var_int("bisect_bad", reaches - 1);
 322         print_var_int("bisect_all", all);
 323         print_var_int("bisect_steps", estimate_bisect_steps(all));
 324
 325         return 0;
 326 }
 327
 328 static int show_object_fast(
 329         const struct object_id *oid,
 330         enum object_type type,
 331         int exclude,
 332         uint32_t name_hash,
 333         struct packed_git *found_pack,
 334         off_t found_offset)
 335 {
 336         fprintf(stdout, "%s\n", oid_to_hex(oid));
 337         return 1;
 338 }
 339
 340 static inline int parse_missing_action_value(const char *value)
 341 {
 342         if (!strcmp(value, "error")) {
 343                 arg_missing_action = MA_ERROR;
 344                 return 1;
 345         }
 346
 347         if (!strcmp(value, "allow-any")) {
 348                 arg_missing_action = MA_ALLOW_ANY;
 349                 fetch_if_missing = 0;
 350                 return 1;
 351         }
 352
 353         if (!strcmp(value, "print")) {
 354                 arg_missing_action = MA_PRINT;
 355                 fetch_if_missing = 0;
 356                 return 1;
 357         }
 358
 359         if (!strcmp(value, "allow-promisor")) {
 360                 arg_missing_action = MA_ALLOW_PROMISOR;
 361                 fetch_if_missing = 0;
 362                 return 1;
 363         }
 364
 365         return 0;
 366 }
 367
 368 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 369 {
 370         struct rev_info revs;
 371         struct rev_list_info info;
 372         struct setup_revision_opt s_r_opt = {
 373                 .allow_exclude_promisor_objects = 1,
 374         };
 375         int i;
 376         int bisect_list = 0;
 377         int bisect_show_vars = 0;
 378         int bisect_find_all = 0;
 379         int use_bitmap_index = 0;
 380         const char *show_progress = NULL;
 381
 382         if (argc == 2 && !strcmp(argv[1], "-h"))
 383                 usage(rev_list_usage);
 384
 385         git_config(git_default_config, NULL);
 386         repo_init_revisions(the_repository, &revs, prefix);
 387         revs.abbrev = DEFAULT_ABBREV;
 388         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 389
 390         /*
 391          * Scan the argument list before invoking setup_revisions(), so that we
 392          * know if fetch_if_missing needs to be set to 0.
 393          *
 394          * "--exclude-promisor-objects" acts as a pre-filter on missing objects
 395          * by not crossing the boundary from realized objects to promisor
 396          * objects.
 397          *
 398          * Let "--missing" to conditionally set fetch_if_missing.
 399          */
 400         for (i = 1; i < argc; i++) {
 401                 const char *arg = argv[i];
 402                 if (!strcmp(arg, "--exclude-promisor-objects")) {
 403                         fetch_if_missing = 0;
 404                         revs.exclude_promisor_objects = 1;
 405                         break;
 406                 }
 407         }
 408         for (i = 1; i < argc; i++) {
 409                 const char *arg = argv[i];
 410                 if (skip_prefix(arg, "--missing=", &arg)) {
 411                         if (revs.exclude_promisor_objects)
 412                                 die(_("cannot combine --exclude-promisor-objects and --missing"));
 413                         if (parse_missing_action_value(arg))
 414                                 break;
 415                 }
 416         }
 417
 418         if (arg_missing_action)
 419                 revs.do_not_die_on_missing_tree = 1;
 420
 421         argc = setup_revisions(argc, argv, &revs, &s_r_opt);
 422
 423         memset(&info, 0, sizeof(info));
 424         info.revs = &revs;
 425         if (revs.bisect)
 426                 bisect_list = 1;
 427
 428         if (revs.diffopt.flags.quick)
 429                 info.flags |= REV_LIST_QUIET;
 430         for (i = 1 ; i < argc; i++) {
 431                 const char *arg = argv[i];
 432
 433                 if (!strcmp(arg, "--header")) {
 434                         revs.verbose_header = 1;
 435                         continue;
 436                 }
 437                 if (!strcmp(arg, "--timestamp")) {
 438                         info.show_timestamp = 1;
 439                         continue;
 440                 }
 441                 if (!strcmp(arg, "--bisect")) {
 442                         bisect_list = 1;
 443                         continue;
 444                 }
 445                 if (!strcmp(arg, "--bisect-all")) {
 446                         bisect_list = 1;
 447                         bisect_find_all = 1;
 448                         info.flags |= BISECT_SHOW_ALL;
 449                         revs.show_decorations = 1;
 450                         continue;
 451                 }
 452                 if (!strcmp(arg, "--bisect-vars")) {
 453                         bisect_list = 1;
 454                         bisect_show_vars = 1;
 455                         continue;
 456                 }
 457                 if (!strcmp(arg, "--use-bitmap-index")) {
 458                         use_bitmap_index = 1;
 459                         continue;
 460                 }
 461                 if (!strcmp(arg, "--test-bitmap")) {
 462                         test_bitmap_walk(&revs);
 463                         return 0;
 464                 }
 465                 if (skip_prefix(arg, "--progress=", &arg)) {
 466                         show_progress = arg;
 467                         continue;
 468                 }
 469
 470                 if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 471                         parse_list_objects_filter(&filter_options, arg);
 472                         if (filter_options.choice && !revs.blob_objects)
 473                                 die(_("object filtering requires --objects"));
 474                         continue;
 475                 }
 476                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 477                         list_objects_filter_set_no_filter(&filter_options);
 478                         continue;
 479                 }
 480                 if (!strcmp(arg, "--filter-print-omitted")) {
 481                         arg_print_omitted = 1;
 482                         continue;
 483                 }
 484
 485                 if (!strcmp(arg, "--exclude-promisor-objects"))
 486                         continue; /* already handled above */
 487                 if (skip_prefix(arg, "--missing=", &arg))
 488                         continue; /* already handled above */
 489
 490                 if (!strcmp(arg, ("--no-object-names"))) {
 491                         arg_show_object_names = 0;
 492                         continue;
 493                 }
 494
 495                 if (!strcmp(arg, ("--object-names"))) {
 496                         arg_show_object_names = 1;
 497                         continue;
 498                 }
 499
 500                 usage(rev_list_usage);
 501
 502         }
 503         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 504                 /* The command line has a --pretty  */
 505                 info.hdr_termination = '\n';
 506                 if (revs.commit_format == CMIT_FMT_ONELINE)
 507                         info.header_prefix = "";
 508                 else
 509                         info.header_prefix = "commit ";
 510         }
 511         else if (revs.verbose_header)
 512                 /* Only --header was specified */
 513                 revs.commit_format = CMIT_FMT_RAW;
 514
 515         if ((!revs.commits && reflog_walk_empty(revs.reflog_info) &&
 516              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 517               !revs.pending.nr) &&
 518              !revs.rev_input_given && !revs.read_from_stdin) ||
 519             revs.diff)
 520                 usage(rev_list_usage);
 521
 522         if (revs.show_notes)
 523                 die(_("rev-list does not support display of notes"));
 524
 525         if (filter_options.choice && use_bitmap_index)
 526                 die(_("cannot combine --use-bitmap-index with object filtering"));
 527
 528         save_commit_buffer = (revs.verbose_header ||
 529                               revs.grep_filter.pattern_list ||
 530                               revs.grep_filter.header_list);
 531         if (bisect_list)
 532                 revs.limited = 1;
 533
 534         if (show_progress)
 535                 progress = start_delayed_progress(show_progress, 0);
 536
 537         if (use_bitmap_index && !revs.prune) {
 538                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 539                         uint32_t commit_count;
 540                         int max_count = revs.max_count;
 541                         struct bitmap_index *bitmap_git;
 542                         if ((bitmap_git = prepare_bitmap_walk(&revs))) {
 543                                 count_bitmap_commit_list(bitmap_git, &commit_count, NULL, NULL, NULL);
 544                                 if (max_count >= 0 && max_count < commit_count)
 545                                         commit_count = max_count;
 546                                 printf("%d\n", commit_count);
 547                                 free_bitmap_index(bitmap_git);
 548                                 return 0;
 549                         }
 550                 } else if (revs.max_count < 0 &&
 551                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 552                         struct bitmap_index *bitmap_git;
 553                         if ((bitmap_git = prepare_bitmap_walk(&revs))) {
 554                                 traverse_bitmap_commit_list(bitmap_git, &show_object_fast);
 555                                 free_bitmap_index(bitmap_git);
 556                                 return 0;
 557                         }
 558                 }
 559         }
 560
 561         if (prepare_revision_walk(&revs))
 562                 die("revision walk setup failed");
 563         if (revs.tree_objects)
 564                 mark_edges_uninteresting(&revs, show_edge, 0);
 565
 566         if (bisect_list) {
 567                 int reaches, all;
 568
 569                 find_bisection(&revs.commits, &reaches, &all, bisect_find_all);
 570
 571                 if (bisect_show_vars)
 572                         return show_bisect_vars(&info, reaches, all);
 573         }
 574
 575         if (arg_print_omitted)
 576                 oidset_init(&omitted_objects, DEFAULT_OIDSET_SIZE);
 577         if (arg_missing_action == MA_PRINT)
 578                 oidset_init(&missing_objects, DEFAULT_OIDSET_SIZE);
 579
 580         traverse_commit_list_filtered(
 581                 &filter_options, &revs, show_commit, show_object, &info,
 582                 (arg_print_omitted ? &omitted_objects : NULL));
 583
 584         if (arg_print_omitted) {
 585                 struct oidset_iter iter;
 586                 struct object_id *oid;
 587                 oidset_iter_init(&omitted_objects, &iter);
 588                 while ((oid = oidset_iter_next(&iter)))
 589                         printf("~%s\n", oid_to_hex(oid));
 590                 oidset_clear(&omitted_objects);
 591         }
 592         if (arg_missing_action == MA_PRINT) {
 593                 struct oidset_iter iter;
 594                 struct object_id *oid;
 595                 oidset_iter_init(&missing_objects, &iter);
 596                 while ((oid = oidset_iter_next(&iter)))
 597                         printf("?%s\n", oid_to_hex(oid));
 598                 oidset_clear(&missing_objects);
 599         }
 600
 601         stop_progress(&progress);
 602
 603         if (revs.count) {
 604                 if (revs.left_right && revs.cherry_mark)
 605                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 606                 else if (revs.left_right)
 607                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 608                 else if (revs.cherry_mark)
 609                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 610                 else
 611                         printf("%d\n", revs.count_left + revs.count_right);
 612         }
 613
 614         return 0;
 615 }