hg: use same logic as git for finding latest tagged commit

[avirshup]

This is a fix for #229

[avirshup]

This PR ignores hg tags that don't contain a '.' in them (similarly to the way git.py uses git describe).

I've created a couple new helper functions in hg.py to do this -

• get_graph_distance for computing the distance between two revisions in mercurial, and
• get_latest_normalizable_tag, for returning the latest "version-like" hg tag. Right now, it just inelegantly filters for the presence of '.' in the tag. But it will likely be rewritten by a more general test in the fix for git and hg: ignore tags that can't be normalized to version numbers #235.

[RonnyPfannschmidt]

sorry for the delay, i have been on travel and didnt get to sorting it before, i plan to sort the backlog on setuptools_scm until the weekend, thanks for the patience

[RonnyPfannschmidt]

thanks 👍

[avirshup]

Thanks - and no worries whatsoever about the timing, open source maintainers deserve vacations too :)

[RonnyPfannschmidt]

i plan to do a release with support for branches added and support for ancient broken setuptools dropped, please take a look