Adam J. Stewart 5792a805fc core: quick fix for packages without URLs ... Some packages do not have a `url` and are instead downloaded via `git`, `hg`, or `svn`. Some packages like `spectrum-mpi` cannot be downloaded at all, and are placeholder packages for system installations. Previously, `__init__()` in `PackageBase` crashed if a package did not have a `url` attribute defined. I hacked this section of code out, but I have no idea what the repercussions of that are.		2018-07-25 23:10:10 -07:00
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spack	core: quick fix for packages without URLs	2018-07-25 23:10:10 -07:00