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