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                          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 name_path *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         struct name_path me;
  73         enum interesting match = revs->diffopt.pathspec.nr == 0 ?
  74                 all_entries_interesting: entry_not_interesting;
  75         int baselen = base->len;
  76
  77         if (!revs->tree_objects)
  78                 return;
  79         if (!obj)
  80                 die("bad tree object");
  81         if (obj->flags & (UNINTERESTING | SEEN))
  82                 return;
  83         if (parse_tree_gently(tree, revs->ignore_missing_links) < 0) {
  84                 if (revs->ignore_missing_links)
  85                         return;
  86                 die("bad tree object %s", oid_to_hex(&obj->oid));
  87         }
  88
  89         obj->flags |= SEEN;
  90         me.base = base;
  91         show(obj, &me, name, cb_data);
  92
  93         strbuf_addstr(base, name);
  94         if (base->len)
  95                 strbuf_addch(base, '/');
  96
  97         init_tree_desc(&desc, tree->buffer, tree->size);
  98
  99         while (tree_entry(&desc, &entry)) {
 100                 if (match != all_entries_interesting) {
 101                         match = tree_entry_interesting(&entry, base, 0,
 102                                                        &revs->diffopt.pathspec);
 103                         if (match == all_entries_not_interesting)
 104                                 break;
 105                         if (match == entry_not_interesting)
 106                                 continue;
 107                 }
 108
 109                 if (S_ISDIR(entry.mode))
 110                         process_tree(revs,
 111                                      lookup_tree(entry.sha1),
 112                                      show, base, entry.path,
 113                                      cb_data);
 114                 else if (S_ISGITLINK(entry.mode))
 115                         process_gitlink(revs, entry.sha1,
 116                                         show, &me, entry.path,
 117                                         cb_data);
 118                 else
 119                         process_blob(revs,
 120                                      lookup_blob(entry.sha1),
 121                                      show, &me, entry.path,
 122                                      cb_data);
 123         }
 124         strbuf_setlen(base, baselen);
 125         free_tree_buffer(tree);
 126 }
 127
 128 static void mark_edge_parents_uninteresting(struct commit *commit,
 129                                             struct rev_info *revs,
 130                                             show_edge_fn show_edge)
 131 {
 132         struct commit_list *parents;
 133
 134         for (parents = commit->parents; parents; parents = parents->next) {
 135                 struct commit *parent = parents->item;
 136                 if (!(parent->object.flags & UNINTERESTING))
 137                         continue;
 138                 mark_tree_uninteresting(parent->tree);
 139                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 140                         parent->object.flags |= SHOWN;
 141                         show_edge(parent);
 142                 }
 143         }
 144 }
 145
 146 void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
 147 {
 148         struct commit_list *list;
 149         int i;
 150
 151         for (list = revs->commits; list; list = list->next) {
 152                 struct commit *commit = list->item;
 153
 154                 if (commit->object.flags & UNINTERESTING) {
 155                         mark_tree_uninteresting(commit->tree);
 156                         if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
 157                                 commit->object.flags |= SHOWN;
 158                                 show_edge(commit);
 159                         }
 160                         continue;
 161                 }
 162                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 163         }
 164         if (revs->edge_hint_aggressive) {
 165                 for (i = 0; i < revs->cmdline.nr; i++) {
 166                         struct object *obj = revs->cmdline.rev[i].item;
 167                         struct commit *commit = (struct commit *)obj;
 168                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 169                                 continue;
 170                         mark_tree_uninteresting(commit->tree);
 171                         if (!(obj->flags & SHOWN)) {
 172                                 obj->flags |= SHOWN;
 173                                 show_edge(commit);
 174                         }
 175                 }
 176         }
 177 }
 178
 179 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 180 {
 181         add_pending_object(revs, &tree->object, "");
 182 }
 183
 184 void traverse_commit_list(struct rev_info *revs,
 185                           show_commit_fn show_commit,
 186                           show_object_fn show_object,
 187                           void *data)
 188 {
 189         int i;
 190         struct commit *commit;
 191         struct strbuf base;
 192
 193         strbuf_init(&base, PATH_MAX);
 194         while ((commit = get_revision(revs)) != NULL) {
 195                 /*
 196                  * an uninteresting boundary commit may not have its tree
 197                  * parsed yet, but we are not going to show them anyway
 198                  */
 199                 if (commit->tree)
 200                         add_pending_tree(revs, commit->tree);
 201                 show_commit(commit, data);
 202         }
 203         for (i = 0; i < revs->pending.nr; i++) {
 204                 struct object_array_entry *pending = revs->pending.objects + i;
 205                 struct object *obj = pending->item;
 206                 const char *name = pending->name;
 207                 const char *path = pending->path;
 208                 if (obj->flags & (UNINTERESTING | SEEN))
 209                         continue;
 210                 if (obj->type == OBJ_TAG) {
 211                         obj->flags |= SEEN;
 212                         show_object(obj, NULL, name, data);
 213                         continue;
 214                 }
 215                 if (!path)
 216                         path = "";
 217                 if (obj->type == OBJ_TREE) {
 218                         process_tree(revs, (struct tree *)obj, show_object,
 219                                      &base, path, data);
 220                         continue;
 221                 }
 222                 if (obj->type == OBJ_BLOB) {
 223                         process_blob(revs, (struct blob *)obj, show_object,
 224                                      NULL, path, data);
 225                         continue;
 226                 }
 227                 die("unknown pending object %s (%s)",
 228                     oid_to_hex(&obj->oid), name);
 229         }
 230         object_array_clear(&revs->pending);
 231         strbuf_release(&base);
 232 }