Peter Josef Scheibel 0715b512a1 env: environments index specs by full DAG w/build deps ... - ensure that Spec._build_hash attr is defined - add logic to compute _build_hash when it is not already computed (e.g. for specs prior to this PR) - add test to ensure that different instance of a build dep are preserved - test conversion of old env lockfile format to new format - tests: avoid view creation, DAG display in tests using MockPackage - add regression test for more-general bug also fixed by this PR - update lockfile version since the way we are maintaining hashes has changed - write out backup for version-1 lockfiles and test that		2019-07-22 13:45:34 -05:00
..
spack	env: environments index specs by full DAG w/build deps	2019-07-22 13:45:34 -05:00