Todd Gamblin c3f52f0200 Initial implementation of package specs, including parser. ... spec.py can parse full dependence specs like this: openmpi@1.4.3:1.4.5%intel+debug ^hwloc@1.2 These will be used to specify how to install packages and their dependencies, as well as to specify restrictions (e.g., on particular versions) for dependencies. e.g.: class SomePackage(Package): depends_on('boost@1.46,1.49') This would require either of those two versions of boost. This also moves depends_on out to relations.py and adds "provides", which will allow packages to provide virtual dependences. This is just initial implementation of the parsing and objects to represent specs. They're not integrated with packages yet.		2013-05-09 14:21:16 -07:00
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spack	Initial implementation of package specs, including parser.	2013-05-09 14:21:16 -07:00