scheibelp 43114c2e06 more-flexible user-specified dependency constraints (#8162) ... * allow user to constrain dependencies that are added conditionally * remove check for not-visited deps from normalize, move it to concretize. The check now runs after the concretization loop completes (so an error is only reported if the user-mentioned spec doesnt appear anywhere in the dag) * remove separate full_spec_deps variable; rename spec_deps to all_spec_deps to clarify that it merges user-specified dependencies with derived dependencies * add unit test to confirm new functionality		2018-05-30 11:07:13 -07:00
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spack	more-flexible user-specified dependency constraints (#8162)	2018-05-30 11:07:13 -07:00