Include zig build in the build process.

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)