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
  11 static void process_blob(struct rev_info *revs,
  12                          struct blob *blob,
  13                          show_object_fn show,
  14                          struct strbuf *path,
  15                          const char *name,
  16                          void *cb_data)
  17 {
  18         struct object *obj = &blob->object;
  19
  20         if (!revs->blob_objects)
  21                 return;
  22         if (!obj)
  23                 die("bad blob object");
  24         if (obj->flags & (UNINTERESTING | SEEN))
  25                 return;
  26         obj->flags |= SEEN;
  27         show(obj, path, name, cb_data);
  28 }
  29
  30 /*
  31  * Processing a gitlink entry currently does nothing, since
  32  * we do not recurse into the subproject.
  33  *
  34  * We *could* eventually add a flag that actually does that,
  35  * which would involve:
  36  *  - is the subproject actually checked out?
  37  *  - if so, see if the subproject has already been added
  38  *    to the alternates list, and add it if not.
  39  *  - process the commit (or tag) the gitlink points to
  40  *    recursively.
  41  *
  42  * However, it's unclear whether there is really ever any
  43  * reason to see superprojects and subprojects as such a
  44  * "unified" object pool (potentially resulting in a totally
  45  * humongous pack - avoiding which was the whole point of
  46  * having gitlinks in the first place!).
  47  *
  48  * So for now, there is just a note that we *could* follow
  49  * the link, and how to do it. Whether it necessarily makes
  50  * any sense what-so-ever to ever do that is another issue.
  51  */
  52 static void process_gitlink(struct rev_info *revs,
  53                             const unsigned char *sha1,
  54                             show_object_fn show,
  55                             struct strbuf *path,
  56                             const char *name,
  57                             void *cb_data)
  58 {
  59         /* Nothing to do */
  60 }
  61
  62 static void process_tree(struct rev_info *revs,
  63                          struct tree *tree,
  64                          show_object_fn show,
  65                          struct strbuf *base,
  66                          const char *name,
  67                          void *cb_data)
  68 {
  69         struct object *obj = &tree->object;
  70         struct tree_desc desc;
  71         struct name_entry entry;
  72         enum interesting match = revs->diffopt.pathspec.nr == 0 ?
  73                 all_entries_interesting: entry_not_interesting;
  74         int baselen = base->len;
  75
  76         if (!revs->tree_objects)
  77                 return;
  78         if (!obj)
  79                 die("bad tree object");
  80         if (obj->flags & (UNINTERESTING | SEEN))
  81                 return;
  82         if (parse_tree_gently(tree, revs->ignore_missing_links) < 0) {
  83                 if (revs->ignore_missing_links)
  84                         return;
  85                 die("bad tree object %s", oid_to_hex(&obj->oid));
  86         }
  87
  88         obj->flags |= SEEN;
  89         show(obj, base, name, cb_data);
  90
  91         strbuf_addstr(base, name);
  92         if (base->len)
  93                 strbuf_addch(base, '/');
  94
  95         init_tree_desc(&desc, tree->buffer, tree->size);
  96
  97         while (tree_entry(&desc, &entry)) {
  98                 if (match != all_entries_interesting) {
  99                         match = tree_entry_interesting(&entry, base, 0,
 100                                                        &revs->diffopt.pathspec);
 101                         if (match == all_entries_not_interesting)
 102                                 break;
 103                         if (match == entry_not_interesting)
 104                                 continue;
 105                 }
 106
 107                 if (S_ISDIR(entry.mode))
 108                         process_tree(revs,
 109                                      lookup_tree(entry.sha1),
 110                                      show, base, entry.path,
 111                                      cb_data);
 112                 else if (S_ISGITLINK(entry.mode))
 113                         process_gitlink(revs, entry.sha1,
 114                                         show, base, entry.path,
 115                                         cb_data);
 116                 else
 117                         process_blob(revs,
 118                                      lookup_blob(entry.sha1),
 119                                      show, base, entry.path,
 120                                      cb_data);
 121         }
 122         strbuf_setlen(base, baselen);
 123         free_tree_buffer(tree);
 124 }
 125
 126 static void mark_edge_parents_uninteresting(struct commit *commit,
 127                                             struct rev_info *revs,
 128                                             show_edge_fn show_edge)
 129 {
 130         struct commit_list *parents;
 131
 132         for (parents = commit->parents; parents; parents = parents->next) {
 133                 struct commit *parent = parents->item;
 134                 if (!(parent->object.flags & UNINTERESTING))
 135                         continue;
 136                 mark_tree_uninteresting(parent->tree);
 137                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 138                         parent->object.flags |= SHOWN;
 139                         show_edge(parent);
 140                 }
 141         }
 142 }
 143
 144 void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
 145 {
 146         struct commit_list *list;
 147         int i;
 148
 149         for (list = revs->commits; list; list = list->next) {
 150                 struct commit *commit = list->item;
 151
 152                 if (commit->object.flags & UNINTERESTING) {
 153                         mark_tree_uninteresting(commit->tree);
 154                         if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
 155                                 commit->object.flags |= SHOWN;
 156                                 show_edge(commit);
 157                         }
 158                         continue;
 159                 }
 160                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 161         }
 162         if (revs->edge_hint_aggressive) {
 163                 for (i = 0; i < revs->cmdline.nr; i++) {
 164                         struct object *obj = revs->cmdline.rev[i].item;
 165                         struct commit *commit = (struct commit *)obj;
 166                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 167                                 continue;
 168                         mark_tree_uninteresting(commit->tree);
 169                         if (!(obj->flags & SHOWN)) {
 170                                 obj->flags |= SHOWN;
 171                                 show_edge(commit);
 172                         }
 173                 }
 174         }
 175 }
 176
 177 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 178 {
 179         add_pending_object(revs, &tree->object, "");
 180 }
 181
 182 void traverse_commit_list(struct rev_info *revs,
 183                           show_commit_fn show_commit,
 184                           show_object_fn show_object,
 185                           void *data)
 186 {
 187         int i;
 188         struct commit *commit;
 189         struct strbuf base;
 190
 191         strbuf_init(&base, PATH_MAX);
 192         while ((commit = get_revision(revs)) != NULL) {
 193                 /*
 194                  * an uninteresting boundary commit may not have its tree
 195                  * parsed yet, but we are not going to show them anyway
 196                  */
 197                 if (commit->tree)
 198                         add_pending_tree(revs, commit->tree);
 199                 show_commit(commit, data);
 200         }
 201         for (i = 0; i < revs->pending.nr; i++) {
 202                 struct object_array_entry *pending = revs->pending.objects + i;
 203                 struct object *obj = pending->item;
 204                 const char *name = pending->name;
 205                 const char *path = pending->path;
 206                 if (obj->flags & (UNINTERESTING | SEEN))
 207                         continue;
 208                 if (obj->type == OBJ_TAG) {
 209                         obj->flags |= SEEN;
 210                         show_object(obj, NULL, name, data);
 211                         continue;
 212                 }
 213                 if (!path)
 214                         path = "";
 215                 if (obj->type == OBJ_TREE) {
 216                         process_tree(revs, (struct tree *)obj, show_object,
 217                                      &base, path, data);
 218                         continue;
 219                 }
 220                 if (obj->type == OBJ_BLOB) {
 221                         process_blob(revs, (struct blob *)obj, show_object,
 222                                      NULL, path, data);
 223                         continue;
 224                 }
 225                 die("unknown pending object %s (%s)",
 226                     oid_to_hex(&obj->oid), name);
 227         }
 228         object_array_clear(&revs->pending);
 229         strbuf_release(&base);
 230 }