Function watchexec::paths::common_prefix

pub fn common_prefix<I, P>(paths: I) -> Option<PathBuf> where
    I: IntoIterator<Item = P>,
    P: AsRef<Path>, 

Returns the longest common prefix of all given paths.

This is a utility function which is useful for finding the common root of a set of origins.

Returns None if zero paths are given or paths share no common prefix.