git.oblomov.eu Git - git/blob - list-objects.c

   1 #include "cache.h"
   2 #include "tag.h"
   3 #include "commit.h"
   4 #include "tree.h"
   5 #include "blob.h"
   6 #include "diff.h"
   7 #include "tree-walk.h"
   8 #include "revision.h"
   9 #include "list-objects.h"
  10 #include "list-objects-filter.h"
  11 #include "list-objects-filter-options.h"
  12 #include "packfile.h"
  13 #include "object-store.h"
  14 #include "trace.h"
  15
  16 struct traversal_context {
  17         struct rev_info *revs;
  18         show_object_fn show_object;
  19         show_commit_fn show_commit;
  20         void *show_data;
  21         filter_object_fn filter_fn;
  22         void *filter_data;
  23 };
  24
  25 static void process_blob(struct traversal_context *ctx,
  26                          struct blob *blob,
  27                          struct strbuf *path,
  28                          const char *name)
  29 {
  30         struct object *obj = &blob->object;
  31         size_t pathlen;
  32         enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
  33
  34         if (!ctx->revs->blob_objects)
  35                 return;
  36         if (!obj)
  37                 die("bad blob object");
  38         if (obj->flags & (UNINTERESTING | SEEN))
  39                 return;
  40
  41         /*
  42          * Pre-filter known-missing objects when explicitly requested.
  43          * Otherwise, a missing object error message may be reported
  44          * later (depending on other filtering criteria).
  45          *
  46          * Note that this "--exclude-promisor-objects" pre-filtering
  47          * may cause the actual filter to report an incomplete list
  48          * of missing objects.
  49          */
  50         if (ctx->revs->exclude_promisor_objects &&
  51             !has_object_file(&obj->oid) &&
  52             is_promisor_object(&obj->oid))
  53                 return;
  54
  55         pathlen = path->len;
  56         strbuf_addstr(path, name);
  57         if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn)
  58                 r = ctx->filter_fn(ctx->revs->repo,
  59                                    LOFS_BLOB, obj,
  60                                    path->buf, &path->buf[pathlen],
  61                                    ctx->filter_data);
  62         if (r & LOFR_MARK_SEEN)
  63                 obj->flags |= SEEN;
  64         if (r & LOFR_DO_SHOW)
  65                 ctx->show_object(obj, path->buf, ctx->show_data);
  66         strbuf_setlen(path, pathlen);
  67 }
  68
  69 /*
  70  * Processing a gitlink entry currently does nothing, since
  71  * we do not recurse into the subproject.
  72  *
  73  * We *could* eventually add a flag that actually does that,
  74  * which would involve:
  75  *  - is the subproject actually checked out?
  76  *  - if so, see if the subproject has already been added
  77  *    to the alternates list, and add it if not.
  78  *  - process the commit (or tag) the gitlink points to
  79  *    recursively.
  80  *
  81  * However, it's unclear whether there is really ever any
  82  * reason to see superprojects and subprojects as such a
  83  * "unified" object pool (potentially resulting in a totally
  84  * humongous pack - avoiding which was the whole point of
  85  * having gitlinks in the first place!).
  86  *
  87  * So for now, there is just a note that we *could* follow
  88  * the link, and how to do it. Whether it necessarily makes
  89  * any sense what-so-ever to ever do that is another issue.
  90  */
  91 static void process_gitlink(struct traversal_context *ctx,
  92                             const unsigned char *sha1,
  93                             struct strbuf *path,
  94                             const char *name)
  95 {
  96         /* Nothing to do */
  97 }
  98
  99 static void process_tree(struct traversal_context *ctx,
 100                          struct tree *tree,
 101                          struct strbuf *base,
 102                          const char *name);
 103
 104 static void process_tree_contents(struct traversal_context *ctx,
 105                                   struct tree *tree,
 106                                   struct strbuf *base)
 107 {
 108         struct tree_desc desc;
 109         struct name_entry entry;
 110         enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ?
 111                 all_entries_interesting : entry_not_interesting;
 112
 113         init_tree_desc(&desc, tree->buffer, tree->size);
 114
 115         while (tree_entry(&desc, &entry)) {
 116                 if (match != all_entries_interesting) {
 117                         match = tree_entry_interesting(ctx->revs->repo->index,
 118                                                        &entry, base, 0,
 119                                                        &ctx->revs->diffopt.pathspec);
 120                         if (match == all_entries_not_interesting)
 121                                 break;
 122                         if (match == entry_not_interesting)
 123                                 continue;
 124                 }
 125
 126                 if (S_ISDIR(entry.mode)) {
 127                         struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid);
 128                         t->object.flags |= NOT_USER_GIVEN;
 129                         process_tree(ctx, t, base, entry.path);
 130                 }
 131                 else if (S_ISGITLINK(entry.mode))
 132                         process_gitlink(ctx, entry.oid.hash,
 133                                         base, entry.path);
 134                 else {
 135                         struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid);
 136                         if (!b) {
 137                                 die(_("entry '%s' in tree %s has blob mode, "
 138                                       "but is not a blob"),
 139                                     entry.path, oid_to_hex(&tree->object.oid));
 140                         }
 141                         b->object.flags |= NOT_USER_GIVEN;
 142                         process_blob(ctx, b, base, entry.path);
 143                 }
 144         }
 145 }
 146
 147 static void process_tree(struct traversal_context *ctx,
 148                          struct tree *tree,
 149                          struct strbuf *base,
 150                          const char *name)
 151 {
 152         struct object *obj = &tree->object;
 153         struct rev_info *revs = ctx->revs;
 154         int baselen = base->len;
 155         enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
 156         int failed_parse;
 157
 158         if (!revs->tree_objects)
 159                 return;
 160         if (!obj)
 161                 die("bad tree object");
 162         if (obj->flags & (UNINTERESTING | SEEN))
 163                 return;
 164
 165         failed_parse = parse_tree_gently(tree, 1);
 166         if (failed_parse) {
 167                 if (revs->ignore_missing_links)
 168                         return;
 169
 170                 /*
 171                  * Pre-filter known-missing tree objects when explicitly
 172                  * requested.  This may cause the actual filter to report
 173                  * an incomplete list of missing objects.
 174                  */
 175                 if (revs->exclude_promisor_objects &&
 176                     is_promisor_object(&obj->oid))
 177                         return;
 178
 179                 if (!revs->do_not_die_on_missing_tree)
 180                         die("bad tree object %s", oid_to_hex(&obj->oid));
 181         }
 182
 183         strbuf_addstr(base, name);
 184         if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn)
 185                 r = ctx->filter_fn(ctx->revs->repo,
 186                                    LOFS_BEGIN_TREE, obj,
 187                                    base->buf, &base->buf[baselen],
 188                                    ctx->filter_data);
 189         if (r & LOFR_MARK_SEEN)
 190                 obj->flags |= SEEN;
 191         if (r & LOFR_DO_SHOW)
 192                 ctx->show_object(obj, base->buf, ctx->show_data);
 193         if (base->len)
 194                 strbuf_addch(base, '/');
 195
 196         if (r & LOFR_SKIP_TREE)
 197                 trace_printf("Skipping contents of tree %s...\n", base->buf);
 198         else if (!failed_parse)
 199                 process_tree_contents(ctx, tree, base);
 200
 201         if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn) {
 202                 r = ctx->filter_fn(ctx->revs->repo,
 203                                    LOFS_END_TREE, obj,
 204                                    base->buf, &base->buf[baselen],
 205                                    ctx->filter_data);
 206                 if (r & LOFR_MARK_SEEN)
 207                         obj->flags |= SEEN;
 208                 if (r & LOFR_DO_SHOW)
 209                         ctx->show_object(obj, base->buf, ctx->show_data);
 210         }
 211
 212         strbuf_setlen(base, baselen);
 213         free_tree_buffer(tree);
 214 }
 215
 216 static void mark_edge_parents_uninteresting(struct commit *commit,
 217                                             struct rev_info *revs,
 218                                             show_edge_fn show_edge)
 219 {
 220         struct commit_list *parents;
 221
 222         for (parents = commit->parents; parents; parents = parents->next) {
 223                 struct commit *parent = parents->item;
 224                 if (!(parent->object.flags & UNINTERESTING))
 225                         continue;
 226                 mark_tree_uninteresting(revs->repo, get_commit_tree(parent));
 227                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 228                         parent->object.flags |= SHOWN;
 229                         show_edge(parent);
 230                 }
 231         }
 232 }
 233
 234 static void add_edge_parents(struct commit *commit,
 235                              struct rev_info *revs,
 236                              show_edge_fn show_edge,
 237                              struct oidset *set)
 238 {
 239         struct commit_list *parents;
 240
 241         for (parents = commit->parents; parents; parents = parents->next) {
 242                 struct commit *parent = parents->item;
 243                 struct tree *tree = get_commit_tree(parent);
 244
 245                 if (!tree)
 246                         continue;
 247
 248                 oidset_insert(set, &tree->object.oid);
 249
 250                 if (!(parent->object.flags & UNINTERESTING))
 251                         continue;
 252                 tree->object.flags |= UNINTERESTING;
 253
 254                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 255                         parent->object.flags |= SHOWN;
 256                         show_edge(parent);
 257                 }
 258         }
 259 }
 260
 261 void mark_edges_uninteresting(struct rev_info *revs,
 262                               show_edge_fn show_edge,
 263                               int sparse)
 264 {
 265         struct commit_list *list;
 266         int i;
 267
 268         if (sparse) {
 269                 struct oidset set;
 270                 oidset_init(&set, 16);
 271
 272                 for (list = revs->commits; list; list = list->next) {
 273                         struct commit *commit = list->item;
 274                         struct tree *tree = get_commit_tree(commit);
 275
 276                         if (commit->object.flags & UNINTERESTING)
 277                                 tree->object.flags |= UNINTERESTING;
 278
 279                         oidset_insert(&set, &tree->object.oid);
 280                         add_edge_parents(commit, revs, show_edge, &set);
 281                 }
 282
 283                 mark_trees_uninteresting_sparse(revs->repo, &set);
 284                 oidset_clear(&set);
 285         } else {
 286                 for (list = revs->commits; list; list = list->next) {
 287                         struct commit *commit = list->item;
 288                         if (commit->object.flags & UNINTERESTING) {
 289                                 mark_tree_uninteresting(revs->repo,
 290                                                         get_commit_tree(commit));
 291                                 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
 292                                         commit->object.flags |= SHOWN;
 293                                         show_edge(commit);
 294                                 }
 295                                 continue;
 296                         }
 297                         mark_edge_parents_uninteresting(commit, revs, show_edge);
 298                 }
 299         }
 300
 301         if (revs->edge_hint_aggressive) {
 302                 for (i = 0; i < revs->cmdline.nr; i++) {
 303                         struct object *obj = revs->cmdline.rev[i].item;
 304                         struct commit *commit = (struct commit *)obj;
 305                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 306                                 continue;
 307                         mark_tree_uninteresting(revs->repo,
 308                                                 get_commit_tree(commit));
 309                         if (!(obj->flags & SHOWN)) {
 310                                 obj->flags |= SHOWN;
 311                                 show_edge(commit);
 312                         }
 313                 }
 314         }
 315 }
 316
 317 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 318 {
 319         add_pending_object(revs, &tree->object, "");
 320 }
 321
 322 static void traverse_trees_and_blobs(struct traversal_context *ctx,
 323                                      struct strbuf *base)
 324 {
 325         int i;
 326
 327         assert(base->len == 0);
 328
 329         for (i = 0; i < ctx->revs->pending.nr; i++) {
 330                 struct object_array_entry *pending = ctx->revs->pending.objects + i;
 331                 struct object *obj = pending->item;
 332                 const char *name = pending->name;
 333                 const char *path = pending->path;
 334                 if (obj->flags & (UNINTERESTING | SEEN))
 335                         continue;
 336                 if (obj->type == OBJ_TAG) {
 337                         obj->flags |= SEEN;
 338                         ctx->show_object(obj, name, ctx->show_data);
 339                         continue;
 340                 }
 341                 if (!path)
 342                         path = "";
 343                 if (obj->type == OBJ_TREE) {
 344                         process_tree(ctx, (struct tree *)obj, base, path);
 345                         continue;
 346                 }
 347                 if (obj->type == OBJ_BLOB) {
 348                         process_blob(ctx, (struct blob *)obj, base, path);
 349                         continue;
 350                 }
 351                 die("unknown pending object %s (%s)",
 352                     oid_to_hex(&obj->oid), name);
 353         }
 354         object_array_clear(&ctx->revs->pending);
 355 }
 356
 357 static void do_traverse(struct traversal_context *ctx)
 358 {
 359         struct commit *commit;
 360         struct strbuf csp; /* callee's scratch pad */
 361         strbuf_init(&csp, PATH_MAX);
 362
 363         while ((commit = get_revision(ctx->revs)) != NULL) {
 364                 /*
 365                  * an uninteresting boundary commit may not have its tree
 366                  * parsed yet, but we are not going to show them anyway
 367                  */
 368                 if (get_commit_tree(commit)) {
 369                         struct tree *tree = get_commit_tree(commit);
 370                         tree->object.flags |= NOT_USER_GIVEN;
 371                         add_pending_tree(ctx->revs, tree);
 372                 }
 373                 ctx->show_commit(commit, ctx->show_data);
 374
 375                 if (ctx->revs->tree_blobs_in_commit_order)
 376                         /*
 377                          * NEEDSWORK: Adding the tree and then flushing it here
 378                          * needs a reallocation for each commit. Can we pass the
 379                          * tree directory without allocation churn?
 380                          */
 381                         traverse_trees_and_blobs(ctx, &csp);
 382         }
 383         traverse_trees_and_blobs(ctx, &csp);
 384         strbuf_release(&csp);
 385 }
 386
 387 void traverse_commit_list(struct rev_info *revs,
 388                           show_commit_fn show_commit,
 389                           show_object_fn show_object,
 390                           void *show_data)
 391 {
 392         struct traversal_context ctx;
 393         ctx.revs = revs;
 394         ctx.show_commit = show_commit;
 395         ctx.show_object = show_object;
 396         ctx.show_data = show_data;
 397         ctx.filter_fn = NULL;
 398         ctx.filter_data = NULL;
 399         do_traverse(&ctx);
 400 }
 401
 402 void traverse_commit_list_filtered(
 403         struct list_objects_filter_options *filter_options,
 404         struct rev_info *revs,
 405         show_commit_fn show_commit,
 406         show_object_fn show_object,
 407         void *show_data,
 408         struct oidset *omitted)
 409 {
 410         struct traversal_context ctx;
 411         filter_free_fn filter_free_fn = NULL;
 412
 413         ctx.revs = revs;
 414         ctx.show_object = show_object;
 415         ctx.show_commit = show_commit;
 416         ctx.show_data = show_data;
 417         ctx.filter_fn = NULL;
 418
 419         ctx.filter_data = list_objects_filter__init(omitted, filter_options,
 420                                                     &ctx.filter_fn, &filter_free_fn);
 421         do_traverse(&ctx);
 422         if (ctx.filter_data && filter_free_fn)
 423                 filter_free_fn(ctx.filter_data);
 424 }