list-objects.c

   1 #include "git-compat-util.h"
   2 #include "tag.h"
   3 #include "commit.h"
   4 #include "gettext.h"
   5 #include "hex.h"
   6 #include "tree.h"
   7 #include "blob.h"
   8 #include "diff.h"
   9 #include "tree-walk.h"
  10 #include "revision.h"
  11 #include "list-objects.h"
  12 #include "list-objects-filter.h"
  13 #include "list-objects-filter-options.h"
  14 #include "packfile.h"
  15 #include "object-store-ll.h"
  16 #include "trace.h"
  17 #include "environment.h"
  18
  19 struct traversal_context {
  20         struct rev_info *revs;
  21         show_object_fn show_object;
  22         show_commit_fn show_commit;
  23         void *show_data;
  24         struct filter *filter;
  25         int depth;
  26 };
  27
  28 static void show_commit(struct traversal_context *ctx,
  29                         struct commit *commit)
  30 {
  31         if (!ctx->show_commit)
  32                 return;
  33         ctx->show_commit(commit, ctx->show_data);
  34 }
  35
  36 static void show_object(struct traversal_context *ctx,
  37                         struct object *object,
  38                         const char *name)
  39 {
  40         if (!ctx->show_object)
  41                 return;
  42         if (ctx->revs->unpacked && has_object_pack(&object->oid))
  43                 return;
  44
  45         ctx->show_object(object, name, ctx->show_data);
  46 }
  47
  48 static void process_blob(struct traversal_context *ctx,
  49                          struct blob *blob,
  50                          struct strbuf *path,
  51                          const char *name)
  52 {
  53         struct object *obj = &blob->object;
  54         size_t pathlen;
  55         enum list_objects_filter_result r;
  56
  57         if (!ctx->revs->blob_objects)
  58                 return;
  59         if (!obj)
  60                 die("bad blob object");
  61         if (obj->flags & (UNINTERESTING | SEEN))
  62                 return;
  63
  64         /*
  65          * Pre-filter known-missing objects when explicitly requested.
  66          * Otherwise, a missing object error message may be reported
  67          * later (depending on other filtering criteria).
  68          *
  69          * Note that this "--exclude-promisor-objects" pre-filtering
  70          * may cause the actual filter to report an incomplete list
  71          * of missing objects.
  72          */
  73         if (ctx->revs->exclude_promisor_objects &&
  74             !repo_has_object_file(the_repository, &obj->oid) &&
  75             is_promisor_object(&obj->oid))
  76                 return;
  77
  78         pathlen = path->len;
  79         strbuf_addstr(path, name);
  80         r = list_objects_filter__filter_object(ctx->revs->repo,
  81                                                LOFS_BLOB, obj,
  82                                                path->buf, &path->buf[pathlen],
  83                                                ctx->filter);
  84         if (r & LOFR_MARK_SEEN)
  85                 obj->flags |= SEEN;
  86         if (r & LOFR_DO_SHOW)
  87                 show_object(ctx, obj, path->buf);
  88         strbuf_setlen(path, pathlen);
  89 }
  90
  91 static void process_tree(struct traversal_context *ctx,
  92                          struct tree *tree,
  93                          struct strbuf *base,
  94                          const char *name);
  95
  96 static void process_tree_contents(struct traversal_context *ctx,
  97                                   struct tree *tree,
  98                                   struct strbuf *base)
  99 {
 100         struct tree_desc desc;
 101         struct name_entry entry;
 102         enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ?
 103                 all_entries_interesting : entry_not_interesting;
 104
 105         init_tree_desc(&desc, &tree->object.oid, tree->buffer, tree->size);
 106
 107         while (tree_entry(&desc, &entry)) {
 108                 if (match != all_entries_interesting) {
 109                         match = tree_entry_interesting(ctx->revs->repo->index,
 110                                                        &entry, base,
 111                                                        &ctx->revs->diffopt.pathspec);
 112                         if (match == all_entries_not_interesting)
 113                                 break;
 114                         if (match == entry_not_interesting)
 115                                 continue;
 116                 }
 117
 118                 if (S_ISDIR(entry.mode)) {
 119                         struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid);
 120                         if (!t) {
 121                                 die(_("entry '%s' in tree %s has tree mode, "
 122                                       "but is not a tree"),
 123                                     entry.path, oid_to_hex(&tree->object.oid));
 124                         }
 125                         t->object.flags |= NOT_USER_GIVEN;
 126                         ctx->depth++;
 127                         process_tree(ctx, t, base, entry.path);
 128                         ctx->depth--;
 129                 }
 130                 else if (S_ISGITLINK(entry.mode))
 131                         ; /* ignore gitlink */
 132                 else {
 133                         struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid);
 134                         if (!b) {
 135                                 die(_("entry '%s' in tree %s has blob mode, "
 136                                       "but is not a blob"),
 137                                     entry.path, oid_to_hex(&tree->object.oid));
 138                         }
 139                         b->object.flags |= NOT_USER_GIVEN;
 140                         process_blob(ctx, b, base, entry.path);
 141                 }
 142         }
 143 }
 144
 145 static void process_tree(struct traversal_context *ctx,
 146                          struct tree *tree,
 147                          struct strbuf *base,
 148                          const char *name)
 149 {
 150         struct object *obj = &tree->object;
 151         struct rev_info *revs = ctx->revs;
 152         int baselen = base->len;
 153         enum list_objects_filter_result r;
 154         int failed_parse;
 155
 156         if (!revs->tree_objects)
 157                 return;
 158         if (!obj)
 159                 die("bad tree object");
 160         if (obj->flags & (UNINTERESTING | SEEN))
 161                 return;
 162         if (revs->include_check_obj &&
 163             !revs->include_check_obj(&tree->object, revs->include_check_data))
 164                 return;
 165
 166         if (ctx->depth > max_allowed_tree_depth)
 167                 die("exceeded maximum allowed tree depth");
 168
 169         failed_parse = parse_tree_gently(tree, 1);
 170         if (failed_parse) {
 171                 if (revs->ignore_missing_links)
 172                         return;
 173
 174                 /*
 175                  * Pre-filter known-missing tree objects when explicitly
 176                  * requested.  This may cause the actual filter to report
 177                  * an incomplete list of missing objects.
 178                  */
 179                 if (revs->exclude_promisor_objects &&
 180                     is_promisor_object(&obj->oid))
 181                         return;
 182
 183                 if (!revs->do_not_die_on_missing_objects)
 184                         die("bad tree object %s", oid_to_hex(&obj->oid));
 185         }
 186
 187         strbuf_addstr(base, name);
 188         r = list_objects_filter__filter_object(ctx->revs->repo,
 189                                                LOFS_BEGIN_TREE, obj,
 190                                                base->buf, &base->buf[baselen],
 191                                                ctx->filter);
 192         if (r & LOFR_MARK_SEEN)
 193                 obj->flags |= SEEN;
 194         if (r & LOFR_DO_SHOW)
 195                 show_object(ctx, obj, base->buf);
 196         if (base->len)
 197                 strbuf_addch(base, '/');
 198
 199         if (r & LOFR_SKIP_TREE)
 200                 trace_printf("Skipping contents of tree %s...\n", base->buf);
 201         else if (!failed_parse)
 202                 process_tree_contents(ctx, tree, base);
 203
 204         r = list_objects_filter__filter_object(ctx->revs->repo,
 205                                                LOFS_END_TREE, obj,
 206                                                base->buf, &base->buf[baselen],
 207                                                ctx->filter);
 208         if (r & LOFR_MARK_SEEN)
 209                 obj->flags |= SEEN;
 210         if (r & LOFR_DO_SHOW)
 211                 show_object(ctx, obj, base->buf);
 212
 213         strbuf_setlen(base, baselen);
 214         free_tree_buffer(tree);
 215 }
 216
 217 static void process_tag(struct traversal_context *ctx,
 218                         struct tag *tag,
 219                         const char *name)
 220 {
 221         enum list_objects_filter_result r;
 222
 223         r = list_objects_filter__filter_object(ctx->revs->repo, LOFS_TAG,
 224                                                &tag->object, NULL, NULL,
 225                                                ctx->filter);
 226         if (r & LOFR_MARK_SEEN)
 227                 tag->object.flags |= SEEN;
 228         if (r & LOFR_DO_SHOW)
 229                 show_object(ctx, &tag->object, name);
 230 }
 231
 232 static void mark_edge_parents_uninteresting(struct commit *commit,
 233                                             struct rev_info *revs,
 234                                             show_edge_fn show_edge)
 235 {
 236         struct commit_list *parents;
 237
 238         for (parents = commit->parents; parents; parents = parents->next) {
 239                 struct commit *parent = parents->item;
 240                 if (!(parent->object.flags & UNINTERESTING))
 241                         continue;
 242                 mark_tree_uninteresting(revs->repo,
 243                                         repo_get_commit_tree(the_repository, parent));
 244                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 245                         parent->object.flags |= SHOWN;
 246                         show_edge(parent);
 247                 }
 248         }
 249 }
 250
 251 static void add_edge_parents(struct commit *commit,
 252                              struct rev_info *revs,
 253                              show_edge_fn show_edge,
 254                              struct oidset *set)
 255 {
 256         struct commit_list *parents;
 257
 258         for (parents = commit->parents; parents; parents = parents->next) {
 259                 struct commit *parent = parents->item;
 260                 struct tree *tree = repo_get_commit_tree(the_repository,
 261                                                          parent);
 262
 263                 if (!tree)
 264                         continue;
 265
 266                 oidset_insert(set, &tree->object.oid);
 267
 268                 if (!(parent->object.flags & UNINTERESTING))
 269                         continue;
 270                 tree->object.flags |= UNINTERESTING;
 271
 272                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 273                         parent->object.flags |= SHOWN;
 274                         show_edge(parent);
 275                 }
 276         }
 277 }
 278
 279 void mark_edges_uninteresting(struct rev_info *revs,
 280                               show_edge_fn show_edge,
 281                               int sparse)
 282 {
 283         struct commit_list *list;
 284         int i;
 285
 286         if (sparse) {
 287                 struct oidset set;
 288                 oidset_init(&set, 16);
 289
 290                 for (list = revs->commits; list; list = list->next) {
 291                         struct commit *commit = list->item;
 292                         struct tree *tree = repo_get_commit_tree(the_repository,
 293                                                                  commit);
 294
 295                         if (commit->object.flags & UNINTERESTING)
 296                                 tree->object.flags |= UNINTERESTING;
 297
 298                         oidset_insert(&set, &tree->object.oid);
 299                         add_edge_parents(commit, revs, show_edge, &set);
 300                 }
 301
 302                 mark_trees_uninteresting_sparse(revs->repo, &set);
 303                 oidset_clear(&set);
 304         } else {
 305                 for (list = revs->commits; list; list = list->next) {
 306                         struct commit *commit = list->item;
 307                         if (commit->object.flags & UNINTERESTING) {
 308                                 mark_tree_uninteresting(revs->repo,
 309                                                         repo_get_commit_tree(the_repository, commit));
 310                                 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
 311                                         commit->object.flags |= SHOWN;
 312                                         show_edge(commit);
 313                                 }
 314                                 continue;
 315                         }
 316                         mark_edge_parents_uninteresting(commit, revs, show_edge);
 317                 }
 318         }
 319
 320         if (revs->edge_hint_aggressive) {
 321                 for (i = 0; i < revs->cmdline.nr; i++) {
 322                         struct object *obj = revs->cmdline.rev[i].item;
 323                         struct commit *commit = (struct commit *)obj;
 324                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 325                                 continue;
 326                         mark_tree_uninteresting(revs->repo,
 327                                                 repo_get_commit_tree(the_repository, commit));
 328                         if (!(obj->flags & SHOWN)) {
 329                                 obj->flags |= SHOWN;
 330                                 show_edge(commit);
 331                         }
 332                 }
 333         }
 334 }
 335
 336 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 337 {
 338         add_pending_object(revs, &tree->object, "");
 339 }
 340
 341 static void traverse_non_commits(struct traversal_context *ctx,
 342                                  struct strbuf *base)
 343 {
 344         int i;
 345
 346         assert(base->len == 0);
 347
 348         for (i = 0; i < ctx->revs->pending.nr; i++) {
 349                 struct object_array_entry *pending = ctx->revs->pending.objects + i;
 350                 struct object *obj = pending->item;
 351                 const char *name = pending->name;
 352                 const char *path = pending->path;
 353                 if (obj->flags & (UNINTERESTING | SEEN))
 354                         continue;
 355                 if (obj->type == OBJ_TAG) {
 356                         process_tag(ctx, (struct tag *)obj, name);
 357                         continue;
 358                 }
 359                 if (!path)
 360                         path = "";
 361                 if (obj->type == OBJ_TREE) {
 362                         ctx->depth = 0;
 363                         process_tree(ctx, (struct tree *)obj, base, path);
 364                         continue;
 365                 }
 366                 if (obj->type == OBJ_BLOB) {
 367                         process_blob(ctx, (struct blob *)obj, base, path);
 368                         continue;
 369                 }
 370                 die("unknown pending object %s (%s)",
 371                     oid_to_hex(&obj->oid), name);
 372         }
 373         object_array_clear(&ctx->revs->pending);
 374 }
 375
 376 static void do_traverse(struct traversal_context *ctx)
 377 {
 378         struct commit *commit;
 379         struct strbuf csp; /* callee's scratch pad */
 380         strbuf_init(&csp, PATH_MAX);
 381
 382         while ((commit = get_revision(ctx->revs)) != NULL) {
 383                 enum list_objects_filter_result r;
 384
 385                 r = list_objects_filter__filter_object(ctx->revs->repo,
 386                                 LOFS_COMMIT, &commit->object,
 387                                 NULL, NULL, ctx->filter);
 388
 389                 /*
 390                  * an uninteresting boundary commit may not have its tree
 391                  * parsed yet, but we are not going to show them anyway
 392                  */
 393                 if (!ctx->revs->tree_objects)
 394                         ; /* do not bother loading tree */
 395                 else if (ctx->revs->do_not_die_on_missing_objects &&
 396                          oidset_contains(&ctx->revs->missing_commits, &commit->object.oid))
 397                         ;
 398                 else if (repo_get_commit_tree(the_repository, commit)) {
 399                         struct tree *tree = repo_get_commit_tree(the_repository,
 400                                                                  commit);
 401                         tree->object.flags |= NOT_USER_GIVEN;
 402                         add_pending_tree(ctx->revs, tree);
 403                 } else if (commit->object.parsed) {
 404                         die(_("unable to load root tree for commit %s"),
 405                               oid_to_hex(&commit->object.oid));
 406                 }
 407
 408                 if (r & LOFR_MARK_SEEN)
 409                         commit->object.flags |= SEEN;
 410                 if (r & LOFR_DO_SHOW)
 411                         show_commit(ctx, commit);
 412
 413                 if (ctx->revs->tree_blobs_in_commit_order)
 414                         /*
 415                          * NEEDSWORK: Adding the tree and then flushing it here
 416                          * needs a reallocation for each commit. Can we pass the
 417                          * tree directory without allocation churn?
 418                          */
 419                         traverse_non_commits(ctx, &csp);
 420         }
 421         traverse_non_commits(ctx, &csp);
 422         strbuf_release(&csp);
 423 }
 424
 425 void traverse_commit_list_filtered(
 426         struct rev_info *revs,
 427         show_commit_fn show_commit,
 428         show_object_fn show_object,
 429         void *show_data,
 430         struct oidset *omitted)
 431 {
 432         struct traversal_context ctx = {
 433                 .revs = revs,
 434                 .show_object = show_object,
 435                 .show_commit = show_commit,
 436                 .show_data = show_data,
 437         };
 438
 439         if (revs->filter.choice)
 440                 ctx.filter = list_objects_filter__init(omitted, &revs->filter);
 441
 442         do_traverse(&ctx);
 443
 444         if (ctx.filter)
 445                 list_objects_filter__free(ctx.filter);
 446 }