Allow selection of debug build interpreters (#11520)

Extends the `PythonVariant` logic to support interpreters with the debug
flag enabled.

crates/uv-python/src/interpreter.rs

@@ -37,6 +37,7 @@ use crate::{
 use windows::Win32::Foundation::{APPMODEL_ERROR_NO_PACKAGE, ERROR_CANT_ACCESS_FILE, WIN32_ERROR};
 
 /// A Python executable and its associated platform markers.
+#[allow(clippy::struct_excessive_bools)]
 #[derive(Debug, Clone)]
 pub struct Interpreter {
     platform: Platform,
@@ -59,6 +60,7 @@ pub struct Interpreter {
     pointer_size: PointerSize,
     gil_disabled: bool,
     real_executable: PathBuf,
+    debug_enabled: bool,
 }
 
 impl Interpreter {
@@ -82,6 +84,7 @@ impl Interpreter {
             sys_base_exec_prefix: info.sys_base_exec_prefix,
             pointer_size: info.pointer_size,
             gil_disabled: info.gil_disabled,
+            debug_enabled: info.debug_enabled,
             sys_base_prefix: info.sys_base_prefix,
             sys_base_executable: info.sys_base_executable,
             sys_executable: info.sys_executable,
@@ -212,7 +215,13 @@ impl Interpreter {
 
     pub fn variant(&self) -> PythonVariant {
         if self.gil_disabled() {
-            PythonVariant::Freethreaded
+            if self.debug_enabled() {
+                PythonVariant::FreethreadedDebug
+            } else {
+                PythonVariant::Freethreaded
+            }
+        } else if self.debug_enabled() {
+            PythonVariant::Debug
         } else {
             PythonVariant::default()
         }
@@ -508,6 +517,12 @@ impl Interpreter {
         self.gil_disabled
     }
 
+    /// Return whether this is a debug build of Python, as specified by the sysconfig var
+    /// `Py_DEBUG`.
+    pub fn debug_enabled(&self) -> bool {
+        self.debug_enabled
+    }
+
     /// Return the `--target` directory for this interpreter, if any.
     pub fn target(&self) -> Option<&Target> {
         self.target.as_ref()
@@ -877,6 +892,7 @@ pub enum InterpreterInfoError {
     EmscriptenNotPyodide,
 }
 
+#[allow(clippy::struct_excessive_bools)]
 #[derive(Debug, Deserialize, Serialize, Clone)]
 struct InterpreterInfo {
     platform: Platform,
@@ -895,6 +911,7 @@ struct InterpreterInfo {
     standalone: bool,
     pointer_size: PointerSize,
     gil_disabled: bool,
+    debug_enabled: bool,
 }
 
 impl InterpreterInfo {
@@ -1299,7 +1316,8 @@ mod tests {
                 "scripts": "bin"
             },
             "pointer_size": "64",
-            "gil_disabled": true
+            "gil_disabled": true,
+            "debug_enabled": false
         }
     "##};