Get version into git archives, at least for tags?

[ceball]

On github release pages, e.g. https://github.com/bokeh/datashader/releases, source archives are quite prominently displayed. But if you install or import from those, you get a version of None. However, it might be possible to get the version into the archive. (Although it'll only be right for tags.)

$Format:%D$ (https://github.com/ceball/ttest/blob/v0.2.6a2/.test123) becomes HEAD -> master, tag: v0.2.6a2 (https://github.com/ceball/ttest/archive/v0.2.6a2.tar.gz, which is the link that appears on https://github.com/ceball/ttest/releases).

Need to investigate, but suggests something could be possible.

(For future reference, the placeholders are described at https://git-scm.com/docs/git-log#_pretty_formats)

[jlstevens]

We looked through the formats before but I think we missed this as you probably need to be on the tagged commit for it to show up like that. Anyway, this is good to know and I don't see why we shouldn't be able to parse those strings to get the necessary tag that way.