LVM support for Guix System Distribution

With GNU Guix 0.8.1 and it's distribution there is still lack of LVM support. As I'm probably the only user of LVM, I need to hack support into initrd myself.

I'm trying to write a static analyzer for Lua programming language. And I've ready done some parts, say, lexer/parser/AST/types...etc. The challenge part at present, is to write comment-based type annotation, for later type-inference. I plan to implement it in a week. I've spent years on this area. Hope I'm lucky in hackweek.