soooo...

turns out ALL of the disk operations can be performed with
gobject-introspection.

BUT it's unlikely that that'll be available everywhere, or that
the Arch Linux releng team would include it, etc.
So we have fallbacks to mimic it.

BUT please try to use gobject-introspection with libblockdev,
because it's going to be a lot faster and a lot less error-prone.

aif/disk/__init__.py

@@ -1,5 +1,23 @@
-from . import block
-from . import filesystem
-from . import luks
-from . import lvm
-from . import mdadm
+try:
+    from . import block
+except ImportError:
+    from . import block_fallback as block
+try:
+    from . import filesystem_fallback
+except ImportError:
+    from . import filesystem_fallback as filesystem
+
+try:
+    from . import luks_fallback
+except ImportError:
+    from . import luks_fallback as luks
+
+try:
+    from . import lvm_fallback
+except ImportError:
+    from . import lvm_fallback as lvm
+
+try:
+    from . import mdadm_fallback
+except ImportError:
+    from . import mdadm_fallback as mdadm