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