Gregory Becker d450a2fce2 stacks: initial implementation of stacks on environments ...

- stack syntax in env schema
- switch environment specs over to SpecList object
- add stack functionality to environments
- handle definition extensions through stack.yaml and SpecList
- implement conditional definitions
- tests

2019-07-18 19:28:50 -07:00

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spack

stacks: initial implementation of stacks on environments

2019-07-18 19:28:50 -07:00