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