use std::path::Component;use std::path::Path;use std::path::PathBuf;
pub fn normalize_path<P: AsRef<Path>>(path: P) -> PathBuf { let mut components = path.as_ref().components().peekable(); let mut ret = if let Some(c @ Component::Prefix(..)) = components.peek().cloned() { components.next(); PathBuf::from(c.as_os_str()) } else { PathBuf::new() };
for component in components { match component { Component::Prefix(..) => unreachable!(), Component::RootDir => { ret.push(component.as_os_str()); } Component::CurDir => {} Component::ParentDir => { ret.pop(); } Component::Normal(c) => { ret.push(c); } } } ret}