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)
  22                 die("bad blob object");
  23         if (obj->flags & (UNINTERESTING | SEEN))
  24                 return;
  25         obj->flags |= SEEN;
  26         name = xstrdup(name);
  27         add_object(obj, p, path, name);
  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                             struct object_array *p,
  55                             struct name_path *path,
  56                             const char *name)
  57 {
  58         /* Nothing to do */
  59 }
  60
  61 static void process_tree(struct rev_info *revs,
  62                          struct tree *tree,
  63                          struct object_array *p,
  64                          struct name_path *path,
  65                          const char *name)
  66 {
  67         struct object *obj = &tree->object;
  68         struct tree_desc desc;
  69         struct name_entry entry;
  70         struct name_path me;
  71
  72         if (!revs->tree_objects)
  73                 return;
  74         if (!obj)
  75                 die("bad tree object");
  76         if (obj->flags & (UNINTERESTING | SEEN))
  77                 return;
  78         if (parse_tree(tree) < 0)
  79                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  80         obj->flags |= SEEN;
  81         name = xstrdup(name);
  82         add_object(obj, p, path, name);
  83         me.up = path;
  84         me.elem = name;
  85         me.elem_len = strlen(name);
  86
  87         init_tree_desc(&desc, tree->buffer, tree->size);
  88
  89         while (tree_entry(&desc, &entry)) {
  90                 if (S_ISDIR(entry.mode))
  91                         process_tree(revs,
  92                                      lookup_tree(entry.sha1),
  93                                      p, &me, entry.path);
  94                 else if (S_ISGITLINK(entry.mode))
  95                         process_gitlink(revs, entry.sha1,
  96                                         p, &me, entry.path);
  97                 else
  98                         process_blob(revs,
  99                                      lookup_blob(entry.sha1),
 100                                      p, &me, entry.path);
 101         }
 102         free(tree->buffer);
 103         tree->buffer = NULL;
 104 }
 105
 106 static void mark_edge_parents_uninteresting(struct commit *commit,
 107                                             struct rev_info *revs,
 108                                             show_edge_fn show_edge)
 109 {
 110         struct commit_list *parents;
 111
 112         for (parents = commit->parents; parents; parents = parents->next) {
 113                 struct commit *parent = parents->item;
 114                 if (!(parent->object.flags & UNINTERESTING))
 115                         continue;
 116                 mark_tree_uninteresting(parent->tree);
 117                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 118                         parent->object.flags |= SHOWN;
 119                         show_edge(parent);
 120                 }
 121         }
 122 }
 123
 124 void mark_edges_uninteresting(struct commit_list *list,
 125                               struct rev_info *revs,
 126                               show_edge_fn show_edge)
 127 {
 128         for ( ; list; list = list->next) {
 129                 struct commit *commit = list->item;
 130
 131                 if (commit->object.flags & UNINTERESTING) {
 132                         mark_tree_uninteresting(commit->tree);
 133                         continue;
 134                 }
 135                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 136         }
 137 }
 138
 139 void traverse_commit_list(struct rev_info *revs,
 140                           void (*show_commit)(struct commit *),
 141                           void (*show_object)(struct object_array_entry *))
 142 {
 143         int i;
 144         struct commit *commit;
 145         struct object_array objects = { 0, 0, NULL };
 146
 147         while ((commit = get_revision(revs)) != NULL) {
 148                 process_tree(revs, commit->tree, &objects, NULL, "");
 149                 show_commit(commit);
 150         }
 151         for (i = 0; i < revs->pending.nr; i++) {
 152                 struct object_array_entry *pending = revs->pending.objects + i;
 153                 struct object *obj = pending->item;
 154                 const char *name = pending->name;
 155                 if (obj->flags & (UNINTERESTING | SEEN))
 156                         continue;
 157                 if (obj->type == OBJ_TAG) {
 158                         obj->flags |= SEEN;
 159                         add_object_array(obj, name, &objects);
 160                         continue;
 161                 }
 162                 if (obj->type == OBJ_TREE) {
 163                         process_tree(revs, (struct tree *)obj, &objects,
 164                                      NULL, name);
 165                         continue;
 166                 }
 167                 if (obj->type == OBJ_BLOB) {
 168                         process_blob(revs, (struct blob *)obj, &objects,
 169                                      NULL, name);
 170                         continue;
 171                 }
 172                 die("unknown pending object %s (%s)",
 173                     sha1_to_hex(obj->sha1), name);
 174         }
 175         for (i = 0; i < objects.nr; i++)
 176                 show_object(&objects.objects[i]);
 177         free(objects.objects);
 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 }