[red-knot] Simplify conversions from `std::path::Path` to `VendoredPath(Buf)` (#11988)

crates/red_knot_module_resolver/src/typeshed.rs

@@ -49,12 +49,8 @@ mod tests {
                     panic!("Expected {absolute_path:?} to be a child of {vendored_typeshed_dir:?}")
                 });
 
-            let posix_style_path = relative_path
-                .as_os_str()
-                .to_str()
-                .unwrap_or_else(|| panic!("Expected {relative_path:?} to be a valid UTF-8 path"));
-
-            let vendored_path = VendoredPath::new(posix_style_path);
+            let vendored_path = <&VendoredPath>::try_from(relative_path)
+                .unwrap_or_else(|_| panic!("Expected {relative_path:?} to be valid UTF-8"));
 
             assert!(
                 vendored_typeshed_stubs.exists(vendored_path),

crates/ruff_db/src/vendored/path.rs

@@ -93,3 +93,19 @@ impl Deref for VendoredPathBuf {
         self.as_path()
     }
 }
+
+impl<'a> TryFrom<&'a path::Path> for &'a VendoredPath {
+    type Error = camino::FromPathError;
+
+    fn try_from(value: &'a path::Path) -> Result<Self, Self::Error> {
+        Ok(VendoredPath::new(<&camino::Utf8Path>::try_from(value)?))
+    }
+}
+
+impl TryFrom<path::PathBuf> for VendoredPathBuf {
+    type Error = camino::FromPathBufError;
+
+    fn try_from(value: path::PathBuf) -> Result<Self, Self::Error> {
+        Ok(VendoredPathBuf(camino::Utf8PathBuf::try_from(value)?))
+    }
+}