setup_git_directory: fix segfault if repository is found in cwd

diff --git a/list-objects.c b/list-objects.c
index f1fa21c3978f32882b6aac68c32d33ead6f8f1ff..e5c88c278fe23eefbf4cb4dd0c66251b208e48bd 100644 (file)
--- a/list-objects.c
+++ b/list-objects.c
@@ -25,6 +25,37 @@ static void process_blob(struct rev_info *revs,
        add_object(obj, p, path, name);
 }
 
+/*
+ * Processing a gitlink entry currently does nothing, since
+ * we do not recurse into the subproject.
+ *
+ * We *could* eventually add a flag that actually does that,
+ * which would involve:
+ *  - is the subproject actually checked out?
+ *  - if so, see if the subproject has already been added
+ *    to the alternates list, and add it if not.
+ *  - process the commit (or tag) the gitlink points to
+ *    recursively.
+ *
+ * However, it's unclear whether there is really ever any
+ * reason to see superprojects and subprojects as such a
+ * "unified" object pool (potentially resulting in a totally
+ * humongous pack - avoiding which was the whole point of
+ * having gitlinks in the first place!).
+ *
+ * So for now, there is just a note that we *could* follow
+ * the link, and how to do it. Whether it necessarily makes
+ * any sense what-so-ever to ever do that is another issue.
+ */
+static void process_gitlink(struct rev_info *revs,
+                           const unsigned char *sha1,
+                           struct object_array *p,
+                           struct name_path *path,
+                           const char *name)
+{
+       /* Nothing to do */
+}
+
 static void process_tree(struct rev_info *revs,
                         struct tree *tree,
                         struct object_array *p,
@@ -49,14 +80,16 @@ static void process_tree(struct rev_info *revs,
        me.elem = name;
        me.elem_len = strlen(name);
 
-       desc.buf = tree->buffer;
-       desc.size = tree->size;
+       init_tree_desc(&desc, tree->buffer, tree->size);
 
        while (tree_entry(&desc, &entry)) {
                if (S_ISDIR(entry.mode))
                        process_tree(revs,
                                     lookup_tree(entry.sha1),
                                     p, &me, entry.path);
+               else if (S_ISGITLINK(entry.mode))
+                       process_gitlink(revs, entry.sha1,
+                                       p, &me, entry.path);
                else
                        process_blob(revs,
                                     lookup_blob(entry.sha1),