Re: [PATCH 1/3] tree-walk: learn get_tree_enty_follow_symlinks

> Add a new function, get_tree_entry_follow_symlinks, to tree-walk.[ch].
> The function is not yet used.  It will be used to implement git
> cat-file --batch --follow-symlinks.
>
> The function locates an object by path, following symlinks in the
> repository.  If the symlinks lead outside the repository, the function
> reports this to the caller.
>
> Signed-off-by: David Turner <dturner@twitter.com>
> ---
> diff --git a/tree-walk.c b/tree-walk.c
> index 5dd9a71..6fb4b7d 100644
> --- a/tree-walk.c
> +++ b/tree-walk.c
> @@ -415,6 +415,228 @@ int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info)
>  static int find_tree_entry(struct tree_desc *t, const char *name, unsigned char *result, unsigned *mode)
>  {
> diff --git a/tree-walk.h b/tree-walk.h
> index ae7fb3a..002e5a9 100644
> --- a/tree-walk.h
> +++ b/tree-walk.h
> @@ -40,6 +40,8 @@ struct traverse_info;
>  typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
>  int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
>
> +int get_tree_enty_follow_symlinks(unsigned char *tree_sha1, const char *name, unsigned char *result, unsigned char *result_path, unsigned *mode);