// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license. use std::path::Component; use std::path::Path; use std::path::PathBuf; /// Extension to path_clean::PathClean pub trait PathClean { fn clean(&self) -> T; } impl PathClean for PathBuf { fn clean(&self) -> PathBuf { fn is_clean_path(path: &Path) -> bool { let path = path.to_string_lossy(); let mut current_index = 0; while let Some(index) = path[current_index..].find("\\.") { let trailing_index = index + current_index + 2; let mut trailing_chars = path[trailing_index..].chars(); match trailing_chars.next() { Some('.') => match trailing_chars.next() { Some('/') | Some('\\') | None => { return false; } _ => {} }, Some('/') | Some('\\') => { return false; } _ => {} } current_index = trailing_index; } true } let path = path_clean::PathClean::clean(self); if cfg!(windows) && !is_clean_path(&path) { // temporary workaround because path_clean::PathClean::clean is // not good enough on windows let mut components = Vec::new(); for component in path.components() { match component { Component::CurDir => { // skip } Component::ParentDir => { let maybe_last_component = components.pop(); if !matches!(maybe_last_component, Some(Component::Normal(_))) { panic!("Error normalizing: {}", path.display()); } } Component::Normal(_) | Component::RootDir | Component::Prefix(_) => { components.push(component); } } } components.into_iter().collect::() } else { path } } } #[cfg(test)] mod test { #[cfg(windows)] #[test] fn test_path_clean() { use super::*; run_test("C:\\test\\./file.txt", "C:\\test\\file.txt"); run_test("C:\\test\\../other/file.txt", "C:\\other\\file.txt"); run_test("C:\\test\\../other\\file.txt", "C:\\other\\file.txt"); fn run_test(input: &str, expected: &str) { assert_eq!(PathBuf::from(input).clean(), PathBuf::from(expected)); } } }