Merge branch 'nd/tree-walk-with-repo'

The tree-walk API learned to pass an in-core repository instance throughout more codepaths. * nd/tree-walk-with-repo: t7814: do not generate same commits in different repos Use the right 'struct repository' instead of the_repository match-trees.c: remove the_repo from shift_tree*() tree-walk.c: remove the_repo from get_tree_entry_follow_symlinks() tree-walk.c: remove the_repo from get_tree_entry() tree-walk.c: remove the_repo from fill_tree_descriptor() sha1-file.c: remove the_repo from read_object_with_reference()