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                          struct strbuf *base,
  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         int match = revs->diffopt.pathspec.nr == 0 ? 2 : 0;
  72         int baselen = base->len;
  73
  74         if (!revs->tree_objects)
  75                 return;
  76         if (!obj)
  77                 die("bad tree object");
  78         if (obj->flags & (UNINTERESTING | SEEN))
  79                 return;
  80         if (parse_tree(tree) < 0)
  81                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  82         obj->flags |= SEEN;
  83         show(obj, path, name);
  84         me.up = path;
  85         me.elem = name;
  86         me.elem_len = strlen(name);
  87
  88         if (!match) {
  89                 strbuf_addstr(base, name);
  90                 if (base->len)
  91                         strbuf_addch(base, '/');
  92         }
  93
  94         init_tree_desc(&desc, tree->buffer, tree->size);
  95
  96         while (tree_entry(&desc, &entry)) {
  97                 if (match != 2) {
  98                         match = tree_entry_interesting(&entry, base, 0,
  99                                                        &revs->diffopt.pathspec);
 100                         if (match < 0)
 101                                 break;
 102                         if (match == 0)
 103                                 continue;
 104                 }
 105
 106                 if (S_ISDIR(entry.mode))
 107                         process_tree(revs,
 108                                      lookup_tree(entry.sha1),
 109                                      show, &me, base, entry.path);
 110                 else if (S_ISGITLINK(entry.mode))
 111                         process_gitlink(revs, entry.sha1,
 112                                         show, &me, entry.path);
 113                 else
 114                         process_blob(revs,
 115                                      lookup_blob(entry.sha1),
 116                                      show, &me, entry.path);
 117         }
 118         strbuf_setlen(base, baselen);
 119         free(tree->buffer);
 120         tree->buffer = NULL;
 121 }
 122
 123 static void mark_edge_parents_uninteresting(struct commit *commit,
 124                                             struct rev_info *revs,
 125                                             show_edge_fn show_edge)
 126 {
 127         struct commit_list *parents;
 128
 129         for (parents = commit->parents; parents; parents = parents->next) {
 130                 struct commit *parent = parents->item;
 131                 if (!(parent->object.flags & UNINTERESTING))
 132                         continue;
 133                 mark_tree_uninteresting(parent->tree);
 134                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 135                         parent->object.flags |= SHOWN;
 136                         show_edge(parent);
 137                 }
 138         }
 139 }
 140
 141 void mark_edges_uninteresting(struct commit_list *list,
 142                               struct rev_info *revs,
 143                               show_edge_fn show_edge)
 144 {
 145         for ( ; list; list = list->next) {
 146                 struct commit *commit = list->item;
 147
 148                 if (commit->object.flags & UNINTERESTING) {
 149                         mark_tree_uninteresting(commit->tree);
 150                         continue;
 151                 }
 152                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 153         }
 154 }
 155
 156 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 157 {
 158         add_pending_object(revs, &tree->object, "");
 159 }
 160
 161 void traverse_commit_list(struct rev_info *revs,
 162                           show_commit_fn show_commit,
 163                           show_object_fn show_object,
 164                           void *data)
 165 {
 166         int i;
 167         struct commit *commit;
 168         struct strbuf base;
 169
 170         strbuf_init(&base, PATH_MAX);
 171         while ((commit = get_revision(revs)) != NULL) {
 172                 /*
 173                  * an uninteresting boundary commit may not have its tree
 174                  * parsed yet, but we are not going to show them anyway
 175                  */
 176                 if (commit->tree)
 177                         add_pending_tree(revs, commit->tree);
 178                 show_commit(commit, data);
 179         }
 180         for (i = 0; i < revs->pending.nr; i++) {
 181                 struct object_array_entry *pending = revs->pending.objects + i;
 182                 struct object *obj = pending->item;
 183                 const char *name = pending->name;
 184                 if (obj->flags & (UNINTERESTING | SEEN))
 185                         continue;
 186                 if (obj->type == OBJ_TAG) {
 187                         obj->flags |= SEEN;
 188                         show_object(obj, NULL, name);
 189                         continue;
 190                 }
 191                 if (obj->type == OBJ_TREE) {
 192                         process_tree(revs, (struct tree *)obj, show_object,
 193                                      NULL, &base, name);
 194                         continue;
 195                 }
 196                 if (obj->type == OBJ_BLOB) {
 197                         process_blob(revs, (struct blob *)obj, show_object,
 198                                      NULL, name);
 199                         continue;
 200                 }
 201                 die("unknown pending object %s (%s)",
 202                     sha1_to_hex(obj->sha1), name);
 203         }
 204         if (revs->pending.nr) {
 205                 free(revs->pending.objects);
 206                 revs->pending.nr = 0;
 207                 revs->pending.alloc = 0;
 208                 revs->pending.objects = NULL;
 209         }
 210         strbuf_release(&base);
 211 }