Include zig build in the build process.

MANIFEST.in

@@ -1,6 +1,13 @@
 include pyaegis/aegis_cdef.h
 include setup.py
+include build_backend.py
 include BUILD.md
 include README.md
-recursive-include libaegis/src/include *.h
-include libaegis/zig-out/lib/libaegis.a
+recursive-include libaegis *.c *.h *.zig *.zon
+include libaegis/CMakeLists.txt
+include libaegis/LICENSE
+include libaegis/README.md
+recursive-include libaegis/cmake *.cmake *.cmake.in
+graft libaegis/src
+include libaegis/build.zig
+include libaegis/build.zig.zon

build_backend.py

@@ -0,0 +1,55 @@
+"""Custom build backend that builds libaegis with Zig before building the Python package."""
+
+import subprocess
+import sys
+from pathlib import Path
+
+from setuptools import build_meta as _orig
+
+
+def _build_libaegis():
+    """Build libaegis static library with Zig."""
+    libaegis_dir = Path(__file__).parent / "libaegis"
+    if not libaegis_dir.exists():
+        raise FileNotFoundError(
+            f"libaegis directory not found at {libaegis_dir}. "
+            "Cannot build static library."
+        )
+
+    print("Building libaegis static library with Zig...")
+    try:
+        subprocess.run(
+            ["zig", "build", "-Drelease"],
+            cwd=libaegis_dir,
+            check=True,
+            capture_output=False,
+        )
+        print("Successfully built libaegis static library")
+    except subprocess.CalledProcessError as e:
+        print(f"Error building libaegis: {e}", file=sys.stderr)
+        raise
+    except FileNotFoundError:
+        print(
+            "Error: 'zig' command not found. Please install Zig to build libaegis.",
+            file=sys.stderr,
+        )
+        raise
+
+
+# Expose all the standard build backend hooks
+get_requires_for_build_wheel = _orig.get_requires_for_build_wheel
+get_requires_for_build_sdist = _orig.get_requires_for_build_sdist
+prepare_metadata_for_build_wheel = _orig.prepare_metadata_for_build_wheel
+build_sdist = _orig.build_sdist
+
+
+def build_wheel(wheel_directory, config_settings=None, metadata_directory=None):
+    """Build wheel with libaegis built first."""
+    _build_libaegis()
+    return _orig.build_wheel(wheel_directory, config_settings, metadata_directory)
+
+
+def build_editable(wheel_directory, config_settings=None, metadata_directory=None):
+    """Build editable install with libaegis built first."""
+    _build_libaegis()
+    return _orig.build_editable(wheel_directory, config_settings, metadata_directory)

pyproject.toml

@@ -1,6 +1,7 @@
 [build-system]
 requires = ["setuptools>=61.0", "cffi>=2.0.0"]
-build-backend = "setuptools.build_meta"
+build-backend = "build_backend"
+backend-path = ["."]
 
 [project]
 name = "pyaegis"
@@ -25,6 +26,7 @@ Homepage = "https://github.com/aegis-aead/libaegis"
 [dependency-groups]
 dev = [
     "pytest>=8.4.2",
+    "setuptools>=80.9.0",
 ]
 
 [tool.setuptools]

setup.py

@@ -5,7 +5,6 @@ from pathlib import Path
 from cffi import FFI
 from setuptools import setup
 
-# Read the CDEF header
 cdef_path = Path(__file__).parent / "pyaegis" / "aegis_cdef.h"
 cdef_content = cdef_path.read_text(encoding="utf-8")
 

tests/util.py

@@ -25,4 +25,4 @@ def random_split_bytes(data: bytes) -> list[bytes]:
     for stop in (*cut_points, len(data)):
         parts.append(data[start:stop])
         start = stop
-    return parts
+    return parts

tools/gen_cdef.py

@@ -39,9 +39,7 @@ def clean_declaration(text: str) -> str:
     if "CRYPTO_ALIGN" in text and "typedef struct" in text:
         # Replace "CRYPTO_ALIGN(N) uint8_t opaque[SIZE];" with "...;"
         text = re.sub(
-            r"CRYPTO_ALIGN\s*\(\s*\d+\s*\)\s+uint8_t\s+opaque\[\d+\];",
-            "...;",
-            text
+            r"CRYPTO_ALIGN\s*\(\s*\d+\s*\)\s+uint8_t\s+opaque\[\d+\];", "...;", text
         )
     else:
         # For non-struct declarations, just remove CRYPTO_ALIGN