branch master updated (d690279 -> 28de8d2)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  d690279   gnu: powertabeditor: Replace "gcc" with "libiberty".
       new  cad2526   tests: Add tests for 'guix environment'.
       new  6b6298a   environment: Add only the specified outputs of the 
dependencies.
       new  ce367ef   environment: Add --system.
       new  417c39f   environment: For --ad-hoc, allow users to specify an 
output.
       new  d70389c   environment: Improve error reporting for '-l'.
       new  50500f7   doc: Mention .bashrc vs. .bash_profile for 'guix 
environment'.
       new  28de8d2   environment: Define 'GUIX_ENVIRONMENT'.

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.


Summary of changes:
 Makefile.am                  |    1 +
 doc/guix.texi                |   32 +++++++-
 gnu/system/shadow.scm        |    8 ++-
 guix/gexp.scm                |    4 +-
 guix/scripts/environment.scm |  203 ++++++++++++++++++++++++------------------
 tests/guix-environment.sh    |   84 +++++++++++++++++
 6 files changed, 241 insertions(+), 91 deletions(-)
 create mode 100644 tests/guix-environment.sh