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 name_path *path,
  15                          const char *name)
  16 {
  17         struct object *obj = &blob->object;
  18
  19         if (!revs->blob_objects)
  20                 return;
  21         if (!obj)
  22                 die("bad blob object");
  23         if (obj->flags & (UNINTERESTING | SEEN))
  24                 return;
  25         obj->flags |= SEEN;
  26         show(obj, path, name);
  27 }
  28
  29 /*
  30  * Processing a gitlink entry currently does nothing, since
  31  * we do not recurse into the subproject.
  32  *
  33  * We *could* eventually add a flag that actually does that,
  34  * which would involve:
  35  *  - is the subproject actually checked out?
  36  *  - if so, see if the subproject has already been added
  37  *    to the alternates list, and add it if not.
  38  *  - process the commit (or tag) the gitlink points to
  39  *    recursively.
  40  *
  41  * However, it's unclear whether there is really ever any
  42  * reason to see superprojects and subprojects as such a
  43  * "unified" object pool (potentially resulting in a totally
  44  * humongous pack - avoiding which was the whole point of
  45  * having gitlinks in the first place!).
  46  *
  47  * So for now, there is just a note that we *could* follow
  48  * the link, and how to do it. Whether it necessarily makes
  49  * any sense what-so-ever to ever do that is another issue.
  50  */
  51 static void process_gitlink(struct rev_info *revs,
  52                             const unsigned char *sha1,
  53                             show_object_fn show,
  54                             struct name_path *path,
  55                             const char *name)
  56 {
  57         /* Nothing to do */
  58 }
  59
  60 static void process_tree(struct rev_info *revs,
  61                          struct tree *tree,
  62                          show_object_fn show,
  63                          struct name_path *path,
  64                          const char *name)
  65 {
  66         struct object *obj = &tree->object;
  67         struct tree_desc desc;
  68         struct name_entry entry;
  69         struct name_path me;
  70
  71         if (!revs->tree_objects)
  72                 return;
  73         if (!obj)
  74                 die("bad tree object");
  75         if (obj->flags & (UNINTERESTING | SEEN))
  76                 return;
  77         if (parse_tree(tree) < 0)
  78                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  79         obj->flags |= SEEN;
  80         show(obj, path, name);
  81         me.up = path;
  82         me.elem = name;
  83         me.elem_len = strlen(name);
  84
  85         init_tree_desc(&desc, tree->buffer, tree->size);
  86
  87         while (tree_entry(&desc, &entry)) {
  88                 if (S_ISDIR(entry.mode))
  89                         process_tree(revs,
  90                                      lookup_tree(entry.sha1),
  91                                      show, &me, entry.path);
  92                 else if (S_ISGITLINK(entry.mode))
  93                         process_gitlink(revs, entry.sha1,
  94                                         show, &me, entry.path);
  95                 else
  96                         process_blob(revs,
  97                                      lookup_blob(entry.sha1),
  98                                      show, &me, entry.path);
  99         }
 100         free(tree->buffer);
 101         tree->buffer = NULL;
 102 }
 103
 104 static void mark_edge_parents_uninteresting(struct commit *commit,
 105                                             struct rev_info *revs,
 106                                             show_edge_fn show_edge)
 107 {
 108         struct commit_list *parents;
 109
 110         for (parents = commit->parents; parents; parents = parents->next) {
 111                 struct commit *parent = parents->item;
 112                 if (!(parent->object.flags & UNINTERESTING))
 113                         continue;
 114                 mark_tree_uninteresting(parent->tree);
 115                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 116                         parent->object.flags |= SHOWN;
 117                         show_edge(parent);
 118                 }
 119         }
 120 }
 121
 122 void mark_edges_uninteresting(struct commit_list *list,
 123                               struct rev_info *revs,
 124                               show_edge_fn show_edge)
 125 {
 126         for ( ; list; list = list->next) {
 127                 struct commit *commit = list->item;
 128
 129                 if (commit->object.flags & UNINTERESTING) {
 130                         mark_tree_uninteresting(commit->tree);
 131                         continue;
 132                 }
 133                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 134         }
 135 }
 136
 137 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 138 {
 139         add_pending_object(revs, &tree->object, "");
 140 }
 141
 142 void traverse_commit_list(struct rev_info *revs,
 143                           show_commit_fn show_commit,
 144                           show_object_fn show_object,
 145                           void *data)
 146 {
 147         int i;
 148         struct commit *commit;
 149
 150         while ((commit = get_revision(revs)) != NULL) {
 151                 add_pending_tree(revs, commit->tree);
 152                 show_commit(commit, data);
 153         }
 154         for (i = 0; i < revs->pending.nr; i++) {
 155                 struct object_array_entry *pending = revs->pending.objects + i;
 156                 struct object *obj = pending->item;
 157                 const char *name = pending->name;
 158                 if (obj->flags & (UNINTERESTING | SEEN))
 159                         continue;
 160                 if (obj->type == OBJ_TAG) {
 161                         obj->flags |= SEEN;
 162                         show_object(obj, NULL, name);
 163                         continue;
 164                 }
 165                 if (obj->type == OBJ_TREE) {
 166                         process_tree(revs, (struct tree *)obj, show_object,
 167                                      NULL, name);
 168                         continue;
 169                 }
 170                 if (obj->type == OBJ_BLOB) {
 171                         process_blob(revs, (struct blob *)obj, show_object,
 172                                      NULL, name);
 173                         continue;
 174                 }
 175                 die("unknown pending object %s (%s)",
 176                     sha1_to_hex(obj->sha1), name);
 177         }
 178         if (revs->pending.nr) {
 179                 free(revs->pending.objects);
 180                 revs->pending.nr = 0;
 181                 revs->pending.alloc = 0;
 182                 revs->pending.objects = NULL;
 183         }
 184 }