Dan Albert aa66357f48 [libc++] Refactor test components into modules. ...

Summary:
I've moved the bulk of `lit.cfg` into `test/libcxx/testconfig.py` and
`test/libcxx/testformat.py`. All that remains in `lit.cfg` is the
logic to discover lit.site.cfg if lit.cfg was run directly, and the
logic for loading configuration variants.

The configuration variant flow has changed with this patch. Rather
than instantiating an object of type `<VARIANT>Configuration`, we now
instatiate an object of type `Configuration` that was loaded from the
module `<VARIANT>.testconfig.py`.

This has to be done on a per-project basis rather than in LIT itself
because LIT doesn't actually know where the real test directory is,
only where the site configuration is (which is usually in the output
directory). It's simple enough to do though, so it's fine to require
each project to do it themselves.

I also cleaned up all the pylint issues while I was here, which was
mostly just a matter of fixing long lines.

Reviewers: mclow.lists, jroelofs, EricWF

Reviewed By: EricWF

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D6881

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@225532 91177308-0d34-0410-b5e6-96231b3b80d8

2015-01-09 18:03:29 +00:00

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