Update the Toolchain::find_requested API to take a parsed request

crates/uv-toolchain/src/toolchain.rs

@@ -33,7 +33,8 @@ impl Toolchain {
         cache: &Cache,
     ) -> Result<Self, Error> {
         if let Some(python) = python {
-            Self::find_requested(python, system, preview, cache)
+            let request = ToolchainRequest::parse(python);
+            Self::find_requested(&request, system, preview, cache)
         } else if system.is_preferred() {
             Self::find_default(preview, cache)
         } else {
@@ -60,14 +61,13 @@ impl Toolchain {
 
     /// Find an installed [`Toolchain`] that satisfies a request.
     pub fn find_requested(
-        request: &str,
+        request: &ToolchainRequest,
         system: SystemPython,
         preview: PreviewMode,
         cache: &Cache,
     ) -> Result<Self, Error> {
         let sources = ToolchainSources::from_settings(system, preview);
-        let request = ToolchainRequest::parse(request);
-        let toolchain = find_toolchain(&request, system, &sources, cache)??;
+        let toolchain = find_toolchain(request, system, &sources, cache)??;
 
         Ok(toolchain)
     }

crates/uv/src/commands/pip/compile.rs

@@ -161,7 +161,8 @@ pub(crate) async fn pip_compile(
         SystemPython::Allowed
     };
     let interpreter = if let Some(python) = python.as_ref() {
-        Toolchain::find_requested(python, system, preview, &cache)
+        let request = ToolchainRequest::parse(python);
+        Toolchain::find_requested(&request, system, preview, &cache)
     } else {
         // TODO(zanieb): The split here hints at a problem with the abstraction; we should be able to use
         // `Toolchain::find(...)` here.

crates/uv/src/commands/project/lock.rs

@@ -49,7 +49,8 @@ pub(crate) async fn lock(
                 if request.satisfied(&interpreter, cache) {
                     interpreter
                 } else {
-                    Toolchain::find_requested(python, SystemPython::Allowed, preview, cache)?
+                    let request = ToolchainRequest::parse(python);
+                    Toolchain::find_requested(&request, SystemPython::Allowed, preview, cache)?
                         .into_interpreter()
                 }
             } else {