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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;
use url::Url;
/// 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
}
}
}
pub(crate) fn to_file_specifier(path: &Path) -> Url {
match Url::from_file_path(path) {
Ok(url) => url,
Err(_) => panic!("Invalid path: {}", path.display()),
}
}
// todo(dsherret): we have the below code also in deno_core and it
// would be good to somehow re-use it in both places (we don't want
// to create a dependency on deno_core here)
#[cfg(not(windows))]
#[inline]
pub fn strip_unc_prefix(path: PathBuf) -> PathBuf {
path
}
/// Strips the unc prefix (ex. \\?\) from Windows paths.
#[cfg(windows)]
pub fn strip_unc_prefix(path: PathBuf) -> PathBuf {
use std::path::Component;
use std::path::Prefix;
let mut components = path.components();
match components.next() {
Some(Component::Prefix(prefix)) => {
match prefix.kind() {
// \\?\device
Prefix::Verbatim(device) => {
let mut path = PathBuf::new();
path.push(format!(r"\\{}\", device.to_string_lossy()));
path.extend(components.filter(|c| !matches!(c, Component::RootDir)));
path
}
// \\?\c:\path
Prefix::VerbatimDisk(_) => {
let mut path = PathBuf::new();
path.push(prefix.as_os_str().to_string_lossy().replace(r"\\?\", ""));
path.extend(components);
path
}
// \\?\UNC\hostname\share_name\path
Prefix::VerbatimUNC(hostname, share_name) => {
let mut path = PathBuf::new();
path.push(format!(
r"\\{}\{}\",
hostname.to_string_lossy(),
share_name.to_string_lossy()
));
path.extend(components.filter(|c| !matches!(c, Component::RootDir)));
path
}
_ => path,
}
}
_ => 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));
}
}
#[cfg(windows)]
#[test]
fn test_strip_unc_prefix() {
use std::path::PathBuf;
run_test(r"C:\", r"C:\");
run_test(r"C:\test\file.txt", r"C:\test\file.txt");
run_test(r"\\?\C:\", r"C:\");
run_test(r"\\?\C:\test\file.txt", r"C:\test\file.txt");
run_test(r"\\.\C:\", r"\\.\C:\");
run_test(r"\\.\C:\Test\file.txt", r"\\.\C:\Test\file.txt");
run_test(r"\\?\UNC\localhost\", r"\\localhost");
run_test(r"\\?\UNC\localhost\c$\", r"\\localhost\c$");
run_test(
r"\\?\UNC\localhost\c$\Windows\file.txt",
r"\\localhost\c$\Windows\file.txt",
);
run_test(r"\\?\UNC\wsl$\deno.json", r"\\wsl$\deno.json");
run_test(r"\\?\server1", r"\\server1");
run_test(r"\\?\server1\e$\", r"\\server1\e$\");
run_test(
r"\\?\server1\e$\test\file.txt",
r"\\server1\e$\test\file.txt",
);
fn run_test(input: &str, expected: &str) {
assert_eq!(
super::strip_unc_prefix(PathBuf::from(input)),
PathBuf::from(expected)
);
}
}
}
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