implement speedups with rust v2

.gitignore

@@ -11,3 +11,4 @@ dist/
 htmlcov/
 .tox/
 docs/_build/
+/src/rust/target/

MANIFEST.in

@@ -6,4 +6,6 @@ prune docs/_build
 graft tests
 include src/markupsafe/py.typed
 include src/markupsafe/*.pyi
+graft src/rust
+prune src/rust/target
 global-exclude *.pyc

bench.py

@@ -8,7 +8,7 @@
     ("long plain", '"Hello, World!" * 1000'),
     ("long suffix", '"<strong>Hello, World!</strong>" + "x" * 100_000'),
 ):
-    for mod in "native", "speedups":
+    for mod in "native", "speedups", "rust_speedups":
         subprocess.run(
             [
                 sys.executable,

pyproject.toml

@@ -26,7 +26,7 @@ Source = "https://github.com/pallets/markupsafe/"
 Chat = "https://discord.gg/pallets"
 
 [build-system]
-requires = ["setuptools"]
+requires = ["setuptools", "setuptools-rust"]
 build-backend = "setuptools.build_meta"
 
 [tool.pytest.ini_options]

setup.py

@@ -1,84 +1,30 @@
 import os
 import platform
-import sys
 
 from setuptools import Extension
 from setuptools import setup
-from setuptools.command.build_ext import build_ext
-from setuptools.errors import CCompilerError
-from setuptools.errors import ExecError
-from setuptools.errors import PlatformError
+from setuptools_rust import RustExtension
 
-ext_modules = [Extension("markupsafe._speedups", ["src/markupsafe/_speedups.c"])]
-
-
-class BuildFailed(Exception):
-    pass
-
-
-class ve_build_ext(build_ext):
-    """This class allows C extension building to fail."""
-
-    def run(self):
-        try:
-            super().run()
-        except PlatformError as e:
-            raise BuildFailed() from e
-
-    def build_extension(self, ext):
-        try:
-            super().build_extension(ext)
-        except (CCompilerError, ExecError, PlatformError) as e:
-            raise BuildFailed() from e
-        except ValueError as e:
-            # this can happen on Windows 64 bit, see Python issue 7511
-            if "'path'" in str(sys.exc_info()[1]):  # works with Python 2 and 3
-                raise BuildFailed() from e
-            raise
-
-
-def run_setup(with_binary):
-    setup(
-        cmdclass={"build_ext": ve_build_ext},
-        ext_modules=ext_modules if with_binary else [],
-    )
-
-
-def show_message(*lines):
-    print("=" * 74)
-    for line in lines:
-        print(line)
-    print("=" * 74)
-
-
-supports_speedups = platform.python_implementation() not in {
+if platform.python_implementation() not in {
     "PyPy",
     "Jython",
     "GraalVM",
-}
-
-if os.environ.get("CIBUILDWHEEL", "0") == "1" and supports_speedups:
-    run_setup(True)
-elif supports_speedups:
-    try:
-        run_setup(True)
-    except BuildFailed:
-        show_message(
-            "WARNING: The C extension could not be compiled, speedups"
-            " are not enabled.",
-            "Failure information, if any, is above.",
-            "Retrying the build without the C extension now.",
-        )
-        run_setup(False)
-        show_message(
-            "WARNING: The C extension could not be compiled, speedups"
-            " are not enabled.",
-            "Plain-Python build succeeded.",
-        )
-else:
-    run_setup(False)
-    show_message(
-        "WARNING: C extensions are not supported on this Python"
-        " platform, speedups are not enabled.",
-        "Plain-Python build succeeded.",
+}:
+    local = os.environ.get("CIBUILDWHEEL", "0") != "1"
+    setup(
+        ext_modules=[
+            Extension(
+                "markupsafe._speedups", ["src/markupsafe/_speedups.c"], optional=local
+            )
+        ],
+        rust_extensions=[
+            RustExtension(
+                "markupsafe._rust_speedups",
+                "src/rust/Cargo.toml",
+                optional=local,
+                debug=False,
+            )
+        ],
     )
+else:
+    setup()

src/markupsafe/__init__.py

@@ -6,7 +6,7 @@
 import typing as t
 
 try:
-    from ._speedups import _escape_inner
+    from ._rust_speedups import _escape_inner
 except ImportError:
     from ._native import _escape_inner
 

src/markupsafe/_rust_speedups.pyi

@@ -0,0 +1 @@
+def _escape_inner(s: str, /) -> str: ...