Consider abi3 minor version when resolving Python interpreters (#2437)

Fixes #2436

Author: messense

src/bridge.rs

@@ -1,5 +1,7 @@
 use std::fmt::{Display, Formatter};
 
+use crate::python_interpreter::{MINIMUM_PYPY_MINOR, MINIMUM_PYTHON_MINOR};
+
 /// The name and version of the bindings crate
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct Bindings {
@@ -11,7 +13,7 @@ pub struct Bindings {
 
 impl Bindings {
     /// Returns the minimum python minor version supported
-    pub fn minimal_python_minor_version(&self) -> usize {
+    fn minimal_python_minor_version(&self) -> usize {
         use crate::python_interpreter::MINIMUM_PYTHON_MINOR;
 
         match self.name.as_str() {
@@ -30,7 +32,7 @@ impl Bindings {
     }
 
     /// Returns the minimum PyPy minor version supported
-    pub fn minimal_pypy_minor_version(&self) -> usize {
+    fn minimal_pypy_minor_version(&self) -> usize {
         use crate::python_interpreter::MINIMUM_PYPY_MINOR;
 
         match self.name.as_str() {
@@ -121,6 +123,34 @@ impl BridgeModel {
         matches!(self, BridgeModel::Bin(_))
     }
 
+    /// Returns the minimum python minor version supported
+    pub fn minimal_python_minor_version(&self) -> usize {
+        match self {
+            BridgeModel::Bin(Some(bindings)) | BridgeModel::Bindings(bindings) => {
+                bindings.minimal_python_minor_version()
+            }
+            BridgeModel::BindingsAbi3 {
+                bindings,
+                minor: abi3_minor,
+                ..
+            } => {
+                let bindings_minor = bindings.minimal_python_minor_version();
+                bindings_minor.max(*abi3_minor as usize)
+            }
+            BridgeModel::Bin(None) | BridgeModel::Cffi | BridgeModel::UniFfi => {
+                MINIMUM_PYTHON_MINOR
+            }
+        }
+    }
+
+    /// Returns the minimum PyPy minor version supported
+    pub fn minimal_pypy_minor_version(&self) -> usize {
+        match self.bindings() {
+            Some(bindings) => bindings.minimal_pypy_minor_version(),
+            None => MINIMUM_PYPY_MINOR,
+        }
+    }
+
     /// free-threaded Python support
     pub fn supports_free_threaded(&self) -> bool {
         match self {

src/python_interpreter/mod.rs

@@ -732,12 +732,11 @@ impl PythonInterpreter {
         requires_python: Option<&VersionSpecifiers>,
         bridge: Option<&BridgeModel>,
     ) -> Vec<PythonInterpreter> {
-        let bindings = bridge.and_then(|bridge| bridge.bindings());
-        let min_python_minor = bindings
-            .map(|bindings| bindings.minimal_python_minor_version())
+        let min_python_minor = bridge
+            .map(|bridge| bridge.minimal_python_minor_version())
             .unwrap_or(MINIMUM_PYTHON_MINOR);
-        let min_pypy_minor = bindings
-            .map(|bindings| bindings.minimal_pypy_minor_version())
+        let min_pypy_minor = bridge
+            .map(|bridge| bridge.minimal_pypy_minor_version())
             .unwrap_or(MINIMUM_PYPY_MINOR);
         let supports_free_threaded = bridge
             .map(|bridge| bridge.supports_free_threaded())
@@ -794,18 +793,8 @@ impl PythonInterpreter {
         bridge: &BridgeModel,
         requires_python: Option<&VersionSpecifiers>,
     ) -> Result<Vec<PythonInterpreter>> {
-        let min_python_minor = match bridge {
-            BridgeModel::Bindings(bindings) | BridgeModel::Bin(Some(bindings)) => {
-                bindings.minimal_python_minor_version()
-            }
-            _ => MINIMUM_PYTHON_MINOR,
-        };
-        let min_pypy_minor = match bridge {
-            BridgeModel::Bindings(bindings) | BridgeModel::Bin(Some(bindings)) => {
-                bindings.minimal_pypy_minor_version()
-            }
-            _ => MINIMUM_PYPY_MINOR,
-        };
+        let min_python_minor = bridge.minimal_python_minor_version();
+        let min_pypy_minor = bridge.minimal_pypy_minor_version();
         let executables = if target.is_windows() {
             // TOFIX: add PyPy support to Windows
             find_all_windows(target, min_python_minor, requires_python)?