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denoland-deno/core/normalize_path.rs

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
2020-09-21 08:26:41 -04:00
use std::path::Component;
use std::path::Path;
use std::path::PathBuf;
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/// Normalize all intermediate components of the path (ie. remove "./" and "../" components).
/// Similar to `fs::canonicalize()` but doesn't resolve symlinks.
///
/// Taken from Cargo
/// <https://github.com/rust-lang/cargo/blob/af307a38c20a753ec60f0ad18be5abed3db3c9ac/src/cargo/util/paths.rs#L60-L85>
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
}