Todd Gamblin b2e9696052 argparse: lazily construct common arguments ... Continuing to shave small bits of time off startup -- `spack.cmd.common.arguments` constructs many `Args` objects at module scope, which has to be done for all commands that import it. Instead of doing this at load time, do it lazily. - [x] construct Args objects lazily - [x] remove the module-scoped argparse fixture - [x] make the mock config scope set dirty to False by default (like the regular scope) This *seems* to reduce load time slightly		2019-12-30 13:01:31 -08:00
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spack	argparse: lazily construct common arguments	2019-12-30 13:01:31 -08:00