Kai Germaschewski 3df712a385 Upstreams: don't write metadata directory to upstream DB (#15526) ... When trying to use an upstream Spack repository, as of f2aca86 Spack was attempting to write to the upstream DB based on a new metadata directory added in that commit. Upstream DBs are read-only, so this should not occur. This adds a check to prevent Spack from writing to the upstream DB		2020-03-18 16:41:18 -07:00
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spack	Upstreams: don't write metadata directory to upstream DB (#15526)	2020-03-18 16:41:18 -07:00