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         int match = revs->diffopt.pathspec.nr == 0 ? 2 : 0;
  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(tree) < 0)
  84                 die("bad tree object %s", sha1_to_hex(obj->sha1));
  85         obj->flags |= SEEN;
  86         show(obj, path, name, cb_data);
  87         me.up = path;
  88         me.elem = name;
  89         me.elem_len = strlen(name);
  90
  91         if (!match) {
  92                 strbuf_addstr(base, name);
  93                 if (base->len)
  94                         strbuf_addch(base, '/');
  95         }
  96
  97         init_tree_desc(&desc, tree->buffer, tree->size);
  98
  99         while (tree_entry(&desc, &entry)) {
 100                 if (match != 2) {
 101                         match = tree_entry_interesting(&entry, base, 0,
 102                                                        &revs->diffopt.pathspec);
 103                         if (match < 0)
 104                                 break;
 105                         if (match == 0)
 106                                 continue;
 107                 }
 108
 109                 if (S_ISDIR(entry.mode))
 110                         process_tree(revs,
 111                                      lookup_tree(entry.sha1),
 112                                      show, &me, 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);
 126         tree->buffer = NULL;
 127 }
 128
 129 static void mark_edge_parents_uninteresting(struct commit *commit,
 130                                             struct rev_info *revs,
 131                                             show_edge_fn show_edge)
 132 {
 133         struct commit_list *parents;
 134
 135         for (parents = commit->parents; parents; parents = parents->next) {
 136                 struct commit *parent = parents->item;
 137                 if (!(parent->object.flags & UNINTERESTING))
 138                         continue;
 139                 mark_tree_uninteresting(parent->tree);
 140                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 141                         parent->object.flags |= SHOWN;
 142                         show_edge(parent);
 143                 }
 144         }
 145 }
 146
 147 void mark_edges_uninteresting(struct commit_list *list,
 148                               struct rev_info *revs,
 149                               show_edge_fn show_edge)
 150 {
 151         for ( ; list; list = list->next) {
 152                 struct commit *commit = list->item;
 153
 154                 if (commit->object.flags & UNINTERESTING) {
 155                         mark_tree_uninteresting(commit->tree);
 156                         continue;
 157                 }
 158                 mark_edge_parents_uninteresting(commit, revs, show_edge);
 159         }
 160 }
 161
 162 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 163 {
 164         add_pending_object(revs, &tree->object, "");
 165 }
 166
 167 void traverse_commit_list(struct rev_info *revs,
 168                           show_commit_fn show_commit,
 169                           show_object_fn show_object,
 170                           void *data)
 171 {
 172         int i;
 173         struct commit *commit;
 174         struct strbuf base;
 175
 176         strbuf_init(&base, PATH_MAX);
 177         while ((commit = get_revision(revs)) != NULL) {
 178                 /*
 179                  * an uninteresting boundary commit may not have its tree
 180                  * parsed yet, but we are not going to show them anyway
 181                  */
 182                 if (commit->tree)
 183                         add_pending_tree(revs, commit->tree);
 184                 show_commit(commit, data);
 185         }
 186         for (i = 0; i < revs->pending.nr; i++) {
 187                 struct object_array_entry *pending = revs->pending.objects + i;
 188                 struct object *obj = pending->item;
 189                 const char *name = pending->name;
 190                 if (obj->flags & (UNINTERESTING | SEEN))
 191                         continue;
 192                 if (obj->type == OBJ_TAG) {
 193                         obj->flags |= SEEN;
 194                         show_object(obj, NULL, name, data);
 195                         continue;
 196                 }
 197                 if (obj->type == OBJ_TREE) {
 198                         process_tree(revs, (struct tree *)obj, show_object,
 199                                      NULL, &base, name, data);
 200                         continue;
 201                 }
 202                 if (obj->type == OBJ_BLOB) {
 203                         process_blob(revs, (struct blob *)obj, show_object,
 204                                      NULL, name, data);
 205                         continue;
 206                 }
 207                 die("unknown pending object %s (%s)",
 208                     sha1_to_hex(obj->sha1), name);
 209         }
 210         if (revs->pending.nr) {
 211                 free(revs->pending.objects);
 212                 revs->pending.nr = 0;
 213                 revs->pending.alloc = 0;
 214                 revs->pending.objects = NULL;
 215         }
 216         strbuf_release(&base);
 217 }