Add abi3 support via explicit flag

hatch_rs/plugin.py

@@ -98,7 +98,10 @@ def initialize(self, version: str, build_data: dict[str, Any]) -> None:
             os_name = "linux"
         else:
             os_name = "win"
-        build_data["tag"] = f"cp{version_major}{version_minor}-cp{version_major}{version_minor}-{os_name}_{machine}"
+        if config.abi3:
+            build_data["tag"] = f"cp{version_major}{version_minor}-abi3-{os_name}_{machine}"
+        else:
+            build_data["tag"] = f"cp{version_major}{version_minor}-cp{version_major}{version_minor}-{os_name}_{machine}"
 
         # force include libraries
         for path in Path(".").rglob("*"):

hatch_rs/structs.py

@@ -30,6 +30,11 @@ class HatchRustBuildConfig(BaseModel):
     module: str = Field(description="Python module name for the Rust extension.")
     path: Optional[Path] = Field(default=None, description="Path to the project root directory.")
 
+    abi3: bool = Field(
+        default=False,
+        description="If True, build the extension with Python's ABI3 compatibility.",
+    )
+
     target: Optional[str] = Field(
         default=None,
         description="Target platform for the build. If not specified, it will be determined automatically.",
@@ -147,13 +152,19 @@ def execute(self):
 
             # Copy each file to the current directory
             if sys_platform == "win32":
-                library_name = f"{self.module}\\{file_name}.pyd"
+                if self.abi3:
+                    library_name = f"{self.module}\\{file_name}.abi3.pyd"
+                else:
+                    library_name = f"{self.module}\\{file_name}.pyd"
                 self._libraries.append(library_name)
                 copy_command = f"copy {file} {cwd}\\{library_name}"
             else:
                 if which("cp") is None:
                     raise EnvironmentError("cp command not found. Ensure it is installed and available in PATH.")
-                library_name = f"{self.module}/{file_name}.so"
+                if self.abi3:
+                    library_name = f"{self.module}/{file_name}.abi3.so"
+                else:
+                    library_name = f"{self.module}/{file_name}.so"
                 self._libraries.append(library_name)
                 copy_command = f"cp -f {file} {cwd}/{library_name}"
             system_call(copy_command)

hatch_rs/tests/test_project_basic/pyproject.toml

@@ -30,5 +30,6 @@ packages = ["project"]
 
 [tool.hatch.build.hooks.hatch-rs]
 verbose = true
+abi3 = true
 path = "."
 module = "project"

hatch_rs/tests/test_projects.py

@@ -35,9 +35,9 @@ def test_basic(self, project_folder):
 
         # assert built
         if platform == "win32":
-            assert "project.pyd" in listdir(f"hatch_rs/tests/{project_folder}/project")
+            assert "project.abi3.pyd" in listdir(f"hatch_rs/tests/{project_folder}/project")
         else:
-            assert "project.so" in listdir(f"hatch_rs/tests/{project_folder}/project")
+            assert "project.abi3.so" in listdir(f"hatch_rs/tests/{project_folder}/project")
 
         # dist
         check_call(
@@ -51,7 +51,7 @@ def test_basic(self, project_folder):
             cwd=f"hatch_rs/tests/{project_folder}",
         )
 
-        assert f"cp3{version_info.minor}-cp3{version_info.minor}" in listdir(f"hatch_rs/tests/{project_folder}/dist")[0]
+        assert f"cp3{version_info.minor}-abi3" in listdir(f"hatch_rs/tests/{project_folder}/dist")[0]
 
         # import
         here = Path(__file__).parent / project_folder