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