Use match statement with local imports in boot configurator factory

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

live-build/isobuilder/boot/__init__.py

@@ -20,23 +20,28 @@ def make_boot_configurator_for_arch(
     iso_root: pathlib.Path,
 ) -> "BaseBootConfigurator":
     """Factory function to create boot configurator for a specific architecture."""
+    match arch:
+        case "amd64":
             from .amd64 import AMD64BootConfigurator
+
+            return AMD64BootConfigurator(logger, apt_state, iso_root)
+        case "arm64":
             from .arm64 import ARM64BootConfigurator
+
+            return ARM64BootConfigurator(logger, apt_state, iso_root)
+        case "ppc64el":
             from .ppc64el import PPC64ELBootConfigurator
+
+            return PPC64ELBootConfigurator(logger, apt_state, iso_root)
+        case "riscv64":
             from .riscv64 import RISCV64BootConfigurator
+
+            return RISCV64BootConfigurator(logger, apt_state, iso_root)
+        case "s390x":
             from .s390x import S390XBootConfigurator
 
-    if arch == "amd64":
-        return AMD64BootConfigurator(logger, apt_state, iso_root)
-    elif arch == "arm64":
-        return ARM64BootConfigurator(logger, apt_state, iso_root)
-    elif arch == "ppc64el":
-        return PPC64ELBootConfigurator(logger, apt_state, iso_root)
-    elif arch == "riscv64":
-        return RISCV64BootConfigurator(logger, apt_state, iso_root)
-    elif arch == "s390x":
             return S390XBootConfigurator(logger, apt_state, iso_root)
-    else:
+        case _:
             raise ValueError(f"Unsupported architecture: {arch}")