from pathlib import Path
from os.path import join


def add_files_recursive(files, root, common={}, target_root="/", files_root=None):
    if files_root == None:
        files_root = root

    for p in Path(root).rglob("**/*"):
        if not p.is_dir():
            rel = str(p.relative_to(files_root))
            key = join(target_root, rel)
            files[key] = (files[key] if key in files else {}) | common | {
                "source": rel,
            }