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                 if (revs->ignore_missing_links)
  86                         return;
  87                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  88         }
  89         obj->flags |= SEEN;
  90         show(obj, path, name, cb_data);
  91         me.up = path;
  92         me.elem = name;
  93         me.elem_len = strlen(name);
  94
  95         if (!match) {
  96                 strbuf_addstr(base, name);
  97                 if (base->len)
  98                         strbuf_addch(base, '/');
  99         }
 100
 101         init_tree_desc(&desc, tree->buffer, tree->size);
 102
 103         while (tree_entry(&desc, &entry)) {
 104                 if (match != all_entries_interesting) {
 105                         match = tree_entry_interesting(&entry, base, 0,
 106                                                        &revs->diffopt.pathspec);
 107                         if (match == all_entries_not_interesting)
 108                                 break;
 109                         if (match == entry_not_interesting)
 110                                 continue;
 111                 }
 112
 113                 if (S_ISDIR(entry.mode))
 114                         process_tree(revs,
 115                                      lookup_tree(entry.sha1),
 116                                      show, &me, base, entry.path,
 117                                      cb_data);
 118                 else if (S_ISGITLINK(entry.mode))
 119                         process_gitlink(revs, entry.sha1,
 120                                         show, &me, entry.path,
 121                                         cb_data);
 122                 else
 123                         process_blob(revs,
 124                                      lookup_blob(entry.sha1),
 125                                      show, &me, entry.path,
 126                                      cb_data);
 127         }
 128         strbuf_setlen(base, baselen);
 129         free_tree_buffer(tree);
 130 }
 131
 132 static void mark_edge_parents_uninteresting(struct commit *commit,
 133                                             struct rev_info *revs,
 134                                             show_edge_fn show_edge)
 135 {
 136         struct commit_list *parents;
 137
 138         for (parents = commit->parents; parents; parents = parents->next) {
 139                 struct commit *parent = parents->item;
 140                 if (!(parent->object.flags & UNINTERESTING))
 141                         continue;
 142                 mark_tree_uninteresting(parent->tree);
 143                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 144                         parent->object.flags |= SHOWN;
 145                         show_edge(parent);
 146                 }
 147         }
 148 }
 149
 150 void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
 151 {
 152         struct commit_list *list;
 153         int i;
 154
 155         for (list = revs->commits; list; list = list->next) {
 156                 struct commit *commit = list->item;
 157
 158                 if (commit->object.flags & UNINTERESTING) {
 159                         mark_tree_uninteresting(commit->tree);
 160                         if (revs->edge_hint && !(commit->object.flags & SHOWN)) {
 161                                 commit->object.flags |= SHOWN;
 162                                 show_edge(commit);
 163                         }
 164                         continue;
 165                 }
 166                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 167         }
 168         if (revs->edge_hint) {
 169                 for (i = 0; i < revs->cmdline.nr; i++) {
 170                         struct object *obj = revs->cmdline.rev[i].item;
 171                         struct commit *commit = (struct commit *)obj;
 172                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 173                                 continue;
 174                         mark_tree_uninteresting(commit->tree);
 175                         if (!(obj->flags & SHOWN)) {
 176                                 obj->flags |= SHOWN;
 177                                 show_edge(commit);
 178                         }
 179                 }
 180         }
 181 }
 182
 183 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 184 {
 185         add_pending_object(revs, &tree->object, "");
 186 }
 187
 188 void traverse_commit_list(struct rev_info *revs,
 189                           show_commit_fn show_commit,
 190                           show_object_fn show_object,
 191                           void *data)
 192 {
 193         int i;
 194         struct commit *commit;
 195         struct strbuf base;
 196
 197         strbuf_init(&base, PATH_MAX);
 198         while ((commit = get_revision(revs)) != NULL) {
 199                 /*
 200                  * an uninteresting boundary commit may not have its tree
 201                  * parsed yet, but we are not going to show them anyway
 202                  */
 203                 if (commit->tree)
 204                         add_pending_tree(revs, commit->tree);
 205                 show_commit(commit, data);
 206         }
 207         for (i = 0; i < revs->pending.nr; i++) {
 208                 struct object_array_entry *pending = revs->pending.objects + i;
 209                 struct object *obj = pending->item;
 210                 const char *name = pending->name;
 211                 if (obj->flags & (UNINTERESTING | SEEN))
 212                         continue;
 213                 if (obj->type == OBJ_TAG) {
 214                         obj->flags |= SEEN;
 215                         show_object(obj, NULL, name, data);
 216                         continue;
 217                 }
 218                 if (obj->type == OBJ_TREE) {
 219                         process_tree(revs, (struct tree *)obj, show_object,
 220                                      NULL, &base, name, data);
 221                         continue;
 222                 }
 223                 if (obj->type == OBJ_BLOB) {
 224                         process_blob(revs, (struct blob *)obj, show_object,
 225                                      NULL, name, data);
 226                         continue;
 227                 }
 228                 die("unknown pending object %s (%s)",
 229                     sha1_to_hex(obj->sha1), name);
 230         }
 231         if (revs->pending.nr) {
 232                 free(revs->pending.objects);
 233                 revs->pending.nr = 0;
 234                 revs->pending.alloc = 0;
 235                 revs->pending.objects = NULL;
 236         }
 237         strbuf_release(&base);
 238 }