FIX: update Conda package parsing to handle build containing underscore

[madpah]

Hopefully, this is the solution to the issue raised in #44, #51 and refined into #65.

@bollwyvl kindly provided an example Conda package URL that was breaking our parsing. This PR aims to make our parsing more robust and cater for the example provided.

Signed-off-by: Paul Horton phorton@sonatype.com

[bollwyvl]

Great, thanks for pushing this forward.

A reasonably exhaustive test would be to verify the parsing against a snapshot of the various conda.anaconds.org/{repo}/{subdir}/repodata.json (for {conda-forge,anaconda} and {noarch,win-64,linux-64,osx-64}) which would have examples of every badly-behaved filename that are still installable, and an oracle of their correct parsed values (if even possible).

[madpah]

Thanks @bollwyvl - great idea - will look into that!

[bollwyvl]

Meanwhile: would the upstream index even know how to handle multiple namespaces? sonatype/ossindex-public#27