branch wip-extensible-gexps created (now 20a3daa)

[Ludovic Courtès]

civodul pushed a change to branch wip-extensible-gexps
in repository guix.

        at  20a3daa   gexp: Separate "compilers" for origins and packages from 
the core.

This branch includes the following new commits:

       new  3f964ed   tests: Add an indirection for white-box testing.
       new  de97d2b   gexp: Rename <output-ref> to <gexp-output>.
       new  a331436   gexp: Add <gexp-input>.
       new  dbbf9ff   gexp: Export 'gexp-input' constructor.
       new  af3413b   profiles: Use 'gexp-input' instead of two-element lists.
       new  976ce9b   gexp: Remove special meaning of forms (PACKAGE OUTPUT) in 
ungexp.
       new  20a3daa   gexp: Separate "compilers" for origins and packages from 
the core.

The 7 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.