Function check_empty_dir_cleanup 

pub fn check_empty_dir_cleanup(
    filter: Option<&FilterSettings>,
    we_created_dir: bool,
    anything_copied: bool,
    relative_path: &Path,
    is_root: bool,
    is_dry_run: bool,
) -> EmptyDirAction

Determine what to do with an empty directory when filtering is active.

This is called when we created a directory but nothing was copied into it (no files, symlinks, or child directories). The decision depends on whether the directory itself was directly matched by an include pattern, or if we only entered it to look for potential matches inside.

Arguments

• filter - the active filter settings (None means no filtering)
• we_created_dir - whether we created this directory (vs it already existed)
• anything_copied - whether any content was copied into this directory
• relative_path - path relative to the source root (for pattern matching)
• is_root - whether this is the root (user-specified) source directory
• is_dry_run - whether we’re in dry-run mode