Move the build_backend script to tools folder.

BUILD.md

@@ -109,6 +109,4 @@ If you cannot install Zig, you may manually compile in the libaegis folder (Zig,
 - `pyaegis/` - Python package source
 - `libaegis/` - C library source (submodule)
 - `tests/` - Test suite
-- `tools/` - Code generation scripts
-- `examples/` - Usage examples
-- `build_backend.py` - Custom setuptools build backend to do the Zig libaegis build
+- `tools/` - Code generation scripts and `build_backend.py` used to build libaegis

MANIFEST.in

@@ -1,6 +1,6 @@
 include pyaegis/aegis_cdef.h
 include setup.py
-include build_backend.py
+include tools/build_backend.py
 include BUILD.md
 include README.md
 recursive-include libaegis *.c *.h *.zig *.zon

pyproject.toml

@@ -1,7 +1,7 @@
 [build-system]
 requires = ["setuptools>=61.0", "cffi>=2.0.0"]
 build-backend = "build_backend"
-backend-path = ["."]
+backend-path = ["tools"]
 
 [project]
 name = "pyaegis"

tools/build_backend.py

@@ -34,7 +34,7 @@ def _build_libaegis():
     # Check Zig availability first
     _check_zig_available()
 
-    libaegis_dir = Path(__file__).parent / "libaegis"
+    libaegis_dir = Path(__file__).parent.parent / "libaegis"
     if not libaegis_dir.exists():
         raise FileNotFoundError(
             f"libaegis directory not found at {libaegis_dir}. "