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// 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<T> {
fn clean(&self) -> T;
}
impl PathClean<PathBuf> 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::<PathBuf>()
} 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));
}
}
}
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