Barry Smith ef2c42a889 Do not check directory layout for external packages (#2172) ... External packages do not have an spec.yaml file so don't check for it. Without this change any time a package depends on an external package when the new package is installed you will get the error Install prefix exists but contains no spec.yaml This problem has also haunted me since I started using Spack since PETSc depends on Python and I used an external python but fortunately it was relatively easy to debug once I could reproduce it at will. Funded-by: IDEAS Project: IDEAS/xSDK Time: 1 hour		2016-10-29 20:57:41 -07:00
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spack	Do not check directory layout for external packages (#2172)	2016-10-29 20:57:41 -07:00