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 name_path *path,
  66                          struct strbuf *base,
  67                          const char *name,
  68                          void *cb_data)
  69 {
  70         struct object *obj = &tree->object;
  71         struct tree_desc desc;
  72         struct name_entry entry;
  73         struct name_path me;
  74         enum interesting match = revs->diffopt.pathspec.nr == 0 ?
  75                 all_entries_interesting: entry_not_interesting;
  76         int baselen = base->len;
  77
  78         if (!revs->tree_objects)
  79                 return;
  80         if (!obj)
  81                 die("bad tree object");
  82         if (obj->flags & (UNINTERESTING | SEEN))
  83                 return;
  84         if (parse_tree(tree) < 0)
  85                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  86         obj->flags |= SEEN;
  87         show(obj, path, name, cb_data);
  88         me.up = path;
  89         me.elem = name;
  90         me.elem_len = strlen(name);
  91
  92         if (!match) {
  93                 strbuf_addstr(base, name);
  94                 if (base->len)
  95                         strbuf_addch(base, '/');
  96         }
  97
  98         init_tree_desc(&desc, tree->buffer, tree->size);
  99
 100         while (tree_entry(&desc, &entry)) {
 101                 if (match != all_entries_interesting) {
 102                         match = tree_entry_interesting(&entry, base, 0,
 103                                                        &revs->diffopt.pathspec);
 104                         if (match == all_entries_not_interesting)
 105                                 break;
 106                         if (match == entry_not_interesting)
 107                                 continue;
 108                 }
 109
 110                 if (S_ISDIR(entry.mode))
 111                         process_tree(revs,
 112                                      lookup_tree(entry.sha1),
 113                                      show, &me, base, entry.path,
 114                                      cb_data);
 115                 else if (S_ISGITLINK(entry.mode))
 116                         process_gitlink(revs, entry.sha1,
 117                                         show, &me, entry.path,
 118                                         cb_data);
 119                 else
 120                         process_blob(revs,
 121                                      lookup_blob(entry.sha1),
 122                                      show, &me, entry.path,
 123                                      cb_data);
 124         }
 125         strbuf_setlen(base, baselen);
 126         free(tree->buffer);
 127         tree->buffer = NULL;
 128 }
 129
 130 static void mark_edge_parents_uninteresting(struct commit *commit,
 131                                             struct rev_info *revs,
 132                                             show_edge_fn show_edge)
 133 {
 134         struct commit_list *parents;
 135
 136         for (parents = commit->parents; parents; parents = parents->next) {
 137                 struct commit *parent = parents->item;
 138                 if (!(parent->object.flags & UNINTERESTING))
 139                         continue;
 140                 mark_tree_uninteresting(parent->tree);
 141                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 142                         parent->object.flags |= SHOWN;
 143                         show_edge(parent);
 144                 }
 145         }
 146 }
 147
 148 void mark_edges_uninteresting(struct commit_list *list,
 149                               struct rev_info *revs,
 150                               show_edge_fn show_edge)
 151 {
 152         for ( ; list; list = list->next) {
 153                 struct commit *commit = list->item;
 154
 155                 if (commit->object.flags & UNINTERESTING) {
 156                         mark_tree_uninteresting(commit->tree);
 157                         continue;
 158                 }
 159                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 160         }
 161 }
 162
 163 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 164 {
 165         add_pending_object(revs, &tree->object, "");
 166 }
 167
 168 void traverse_commit_list(struct rev_info *revs,
 169                           show_commit_fn show_commit,
 170                           show_object_fn show_object,
 171                           void *data)
 172 {
 173         int i;
 174         struct commit *commit;
 175         struct strbuf base;
 176
 177         strbuf_init(&base, PATH_MAX);
 178         while ((commit = get_revision(revs)) != NULL) {
 179                 /*
 180                  * an uninteresting boundary commit may not have its tree
 181                  * parsed yet, but we are not going to show them anyway
 182                  */
 183                 if (commit->tree)
 184                         add_pending_tree(revs, commit->tree);
 185                 show_commit(commit, data);
 186         }
 187         for (i = 0; i < revs->pending.nr; i++) {
 188                 struct object_array_entry *pending = revs->pending.objects + i;
 189                 struct object *obj = pending->item;
 190                 const char *name = pending->name;
 191                 if (obj->flags & (UNINTERESTING | SEEN))
 192                         continue;
 193                 if (obj->type == OBJ_TAG) {
 194                         obj->flags |= SEEN;
 195                         show_object(obj, NULL, name, data);
 196                         continue;
 197                 }
 198                 if (obj->type == OBJ_TREE) {
 199                         process_tree(revs, (struct tree *)obj, show_object,
 200                                      NULL, &base, name, data);
 201                         continue;
 202                 }
 203                 if (obj->type == OBJ_BLOB) {
 204                         process_blob(revs, (struct blob *)obj, show_object,
 205                                      NULL, name, data);
 206                         continue;
 207                 }
 208                 die("unknown pending object %s (%s)",
 209                     sha1_to_hex(obj->sha1), name);
 210         }
 211         if (revs->pending.nr) {
 212                 free(revs->pending.objects);
 213                 revs->pending.nr = 0;
 214                 revs->pending.alloc = 0;
 215                 revs->pending.objects = NULL;
 216         }
 217         strbuf_release(&base);
 218 }