56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
use crate::common::*;
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use std::path::Component;
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pub(crate) trait PathExt {
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fn clean(self) -> PathBuf;
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}
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impl PathExt for &Path {
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fn clean(self) -> PathBuf {
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let mut components = Vec::new();
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for component in self.components() {
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if component == Component::ParentDir {
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if let Some(Component::Normal(_)) = components.last() {
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components.pop();
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}
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} else {
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components.push(component);
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}
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}
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components.into_iter().collect()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn clean() {
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let cases = &[
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("/", "foo", "/foo"),
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("/", ".", "/"),
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("/", "foo/./bar", "/foo/bar"),
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("/foo/./bar", ".", "/foo/bar"),
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("/bar", "/foo", "/foo"),
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("//foo", "bar//baz", "/foo/bar/baz"),
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("/", "..", "/"),
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("/", "/..", "/"),
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("/..", "", "/"),
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("/../../../..", "../../../", "/"),
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("/.", "./", "/"),
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("/foo/../", "bar", "/bar"),
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("/foo/bar", "..", "/foo"),
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("/foo/bar/", "..", "/foo"),
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];
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for (prefix, suffix, want) in cases {
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let have = Path::new(prefix).join(Path::new(suffix)).clean();
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assert_eq!(have, Path::new(want));
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}
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}
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}
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