Path Normalisation | Rust Programming Language Community | Page 1

unborn wave Jul 30, 2022, 3:34 PM

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Does anyone have any suggestions to normalise paths?
For example, it'd turn runtime\tests\scripts\./t/m.js into runtime\tests\scripts\t\m.js.
Basically it resolves . and .. paths.

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I found https://docs.rs/normpath/latest/normpath/trait.PathExt.html#tymethod.normalize but the issue with that is that it also canonicalises the path

graceful vapor Jul 30, 2022, 3:55 PM

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we do something similar to sanitize paths here:
https://github.com/actix/actix-web/blob/master/actix-files/src/path_buf.rs#L26
not a copy-paste solution but easily customizable, i expect

unborn wave Jul 30, 2022, 5:36 PM

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This seems to work

pub(crate) fn normalise_path<P: AsRef<Path>>(path: P) -> PathBuf {
    let mut buf = PathBuf::new();
    let segments = path.as_ref().components();

    for segment in segments {
        match segment {
            Component::ParentDir => { buf.pop(); },
            Component::CurDir => {},
            segment => buf.push(segment)
        }
    }
    buf
}

tall jasper Jul 30, 2022, 5:56 PM

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A little warning: foo/../bar is not the same as bar, since foo can be a symlink in which case it would visit the parent directory of the folder foo links to

unborn wave Jul 31, 2022, 2:16 AM

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I know symlinks are an issue but for now, I'm going to ignore those

#Path Normalisation