Adam J. Stewart 0f1a1ae94e Add trailing slash when spidering URLs for versions (#8429) ... By default, if a package does not specify a list_url and does not download from a common repository, Spack runs dirname on the package URL. Given a URL like https://root.cern.ch/download/root_v6.09.02.source.tar.gz, this returns https://root.cern.ch/download. However, https://root.cern.ch/download gives a 404, while https://root.cern.ch/download/ works just fine. Note that some servers *don't* work with a trailing slash, so this tries with and without the slash. This will double the number of URLs searched but the slowdown should only affect the "spack versions" command.		2018-06-12 10:33:47 -07:00
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spack	Add trailing slash when spidering URLs for versions (#8429)	2018-06-12 10:33:47 -07:00