C内核按库功能拆解，编译结果缓存区构建，编译过程与已有缓存结果对照功能实现

tests/native_kernel_source.py

@@ -0,0 +1,25 @@
+"""Read the diagnostic kernel translation unit before test-only injection.
+
+Only component module C includes are expanded. Header includes and the
+amalgamation linkage switch remain for the ordinary C preprocessor to handle.
+An older, unsplit kernels.c is returned unchanged.
+"""
+from pathlib import Path
+import re
+
+
+NATIVE = Path(__file__).resolve().parents[1] / "native"
+_SOURCE_INCLUDE = re.compile(r'^[ \t]*#[ \t]*include[ \t]+"([^"\n]+\.c)"[ \t]*$', re.MULTILINE)
+
+
+def native_kernel_source(native: Path = NATIVE) -> str:
+    entry = native / "components/kernels.c"
+    modules = (native / "components/modules").resolve()
+
+    def expand(match: re.Match[str]) -> str:
+        source = (entry.parent / match[1]).resolve()
+        if not source.is_relative_to(modules):
+            return match[0]
+        return source.read_text(encoding="utf-8")
+
+    return _SOURCE_INCLUDE.sub(expand, entry.read_text(encoding="utf-8"))