Generate import libraries for free-threaded Python 3.13+ builds

.github/workflows/dll.yml

@@ -7,7 +7,7 @@ jobs:
     name: Collect pythonXY.dll
     runs-on: windows-latest
     steps:
-      - uses: actions/setup-python@v5
+      - uses: Quansight-Labs/setup-python@v5
         with:
           python-version: |
               pypy3.8
@@ -20,12 +20,13 @@ jobs:
               3.11
               3.12
               3.13
+              3.13t
           allow-prereleases: true
       - name: Copy pythonXY.dll
         shell: bash
         run: |
           set -e
-          for VER in 3.7 3.8 3.9 3.10 3.11 3.12 3.13; do
+          for VER in 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.13t; do
             VER_NUM=$(echo $VER | sed 's/\.//')
             PREFIX=$(py -$VER -c "import sys; print(sys.base_prefix, end='')")
             cp "$PREFIX/python$VER_NUM.dll" .

README.md

@@ -95,14 +95,14 @@ Generating version-specific `python3y.dll` import libraries
 -----------------------------------------------------------
 
 As an advanced feature, `python3-dll-a` can generate Python version
-specific import libraries such as `python39.lib`.
+specific import libraries such as `python39.lib` or `python313t.lib`.
 
 See the `ImportLibraryGenerator` builder API description for details.
 
 Maintenance
 -----------
 
-This crate embeds Module-Defitions based on the `stable_abi.toml` file from CPython.
+This crate embeds Module-Definitions based on the `stable_abi.toml` file from CPython.
 
 The upstream version of this file is located in the [CPython project][cpython]
 repository under the path `Misc/stable_abi.toml`.

src/lib.rs

@@ -91,7 +91,7 @@
 //! -----------------------------------------------------------
 //!
 //! As an advanced feature, `python3-dll-a` can generate Python version
-//! specific import libraries such as `python39.lib`.
+//! specific import libraries such as `python39.lib` or `python313t.lib`.
 //!
 //! See the [`ImportLibraryGenerator`] builder API description for details.
 
@@ -137,6 +137,9 @@ pub enum PythonImplementation {
 /// Generates `python3.dll` or `pythonXY.dll` import library directly from the
 /// embedded Python ABI definitions data for the specified compile target.
 ///
+/// ABI-tagged versioned Python DLLs such as `python313t.dll` are also supported
+/// via an optional ABI flags string parameter.
+///
 /// Example usage
 /// -------------
 ///
@@ -164,6 +167,13 @@ pub enum PythonImplementation {
 ///     .version(Some((3, 8)))
 ///     .generate(Path::new("target/python3-lib"))
 ///     .unwrap();
+///
+/// // Generate `python313t.lib` in "target/python3-lib"
+/// ImportLibraryGenerator::new("x86_64", "msvc")
+///     .version(Some((3, 13)))
+///     .abiflags(Some("t"))
+///     .generate(Path::new("target/python3-lib"))
+///     .unwrap();
 /// ```
 #[derive(Debug, Clone)]
 pub struct ImportLibraryGenerator {
@@ -175,6 +185,11 @@ pub struct ImportLibraryGenerator {
     version: Option<(u8, u8)>,
     /// Python interpreter implementation
     implementation: PythonImplementation,
+    /// Optional Python ABI flags
+    ///
+    /// For example, `"t"` stands for the free-threaded CPython v3.13 build
+    /// aka CPython `3.13t`.
+    abiflags: Option<String>,
 }
 
 impl ImportLibraryGenerator {
@@ -186,11 +201,12 @@ impl ImportLibraryGenerator {
     /// The compile target environment ABI name (as in `CARGO_CFG_TARGET_ENV`)
     /// is passed in `env`.
     pub fn new(arch: &str, env: &str) -> Self {
-        Self {
+        ImportLibraryGenerator {
             arch: arch.to_string(),
             env: env.to_string(),
             version: None,
             implementation: PythonImplementation::CPython,
+            abiflags: None,
         }
     }
 
@@ -202,6 +218,19 @@ impl ImportLibraryGenerator {
         self
     }
 
+    /// Sets the ABI flags for the `pythonXY<abi>.dll` import library.
+    ///
+    /// For example, `"t"` stands for the free-threaded CPython v3.13 build
+    /// aka CPython `3.13t`.
+    /// In this case, `python313t.dll` import library will be generated.
+    ///
+    /// The untagged versioned `pythonXY.dll` import library
+    /// is generated by default.
+    pub fn abiflags(&mut self, flags: Option<&str>) -> &mut Self {
+        self.abiflags = flags.map(ToOwned::to_owned);
+        self
+    }
+
     /// Sets Python interpreter implementation
     pub fn implementation(&mut self, implementation: PythonImplementation) -> &mut Self {
         self.implementation = implementation;
@@ -256,7 +285,11 @@ impl ImportLibraryGenerator {
                 Some((3, 10)) => ("python310.def", include_str!("python310.def")),
                 Some((3, 11)) => ("python311.def", include_str!("python311.def")),
                 Some((3, 12)) => ("python312.def", include_str!("python312.def")),
-                Some((3, 13)) => ("python313.def", include_str!("python313.def")),
+                Some((3, 13)) => match self.abiflags.as_deref() {
+                    Some("t") => ("python313t.def", include_str!("python313t.def")),
+                    None => ("python313.def", include_str!("python313.def")),
+                    _ => return Err(Error::new(ErrorKind::Other, "Unsupported Python ABI flags")),
+                },
                 _ => return Err(Error::new(ErrorKind::Other, "Unsupported Python version")),
             },
             PythonImplementation::PyPy => match self.version {
@@ -532,6 +565,15 @@ mod tests {
                 .unwrap();
         }
 
+        // Free-threaded CPython v3.13+
+        for minor in 13..=13 {
+            ImportLibraryGenerator::new("x86_64", "gnu")
+                .version(Some((3, minor)))
+                .abiflags(Some("t"))
+                .generate(&dir)
+                .unwrap();
+        }
+
         // PyPy
         for minor in 7..=10 {
             ImportLibraryGenerator::new("x86_64", "gnu")
@@ -571,6 +613,15 @@ mod tests {
                 .unwrap();
         }
 
+        // Free-threaded CPython v3.13+
+        for minor in 13..=13 {
+            ImportLibraryGenerator::new("x86_64", "msvc")
+                .version(Some((3, minor)))
+                .abiflags(Some("t"))
+                .generate(&dir)
+                .unwrap();
+        }
+
         // PyPy
         for minor in 7..=10 {
             ImportLibraryGenerator::new("x86_64", "msvc")