index: Add `index_path_exists()`

This function checks if the converted path of a given index exists, or
not.

It also returns the converted path in `path` if the path exists.

1 files changed, 1 insertions, 0 deletions

diff --git a/index.h b/index.h
index d579d98..4b37534 100644
--- a/index.h
+++ b/index.h
@@ -17,5 +17,6 @@ struct index {
 extern int is_valid_index(index *idx);
 extern char *make_index_path(const char *root, index *idx, int path_type);
 extern char *index_to_str(index *idx);
+extern int index_path_exists(index *idx, const char *root, char **path);
 
 #endif