Todd Gamblin 7aaad89ba9 Lazily evaluate all_package_names in repository.py ...

- Don't need to list all packages unless we have to.

- Only use the list of all packages for existence checks if we have
  generated it for some other purpose.

2016-08-08 21:04:23 -07:00

..

spack

Lazily evaluate all_package_names in repository.py

2016-08-08 21:04:23 -07:00