ENH: use hg-fingerprint to create a .hg_archival.txt file when downloading a tarball
It turns out bitbucket has this nice feature that when you download a source tarball of a tag from here it will add a
.hg_archival.txt file. Files on heptapod do not have this. I think this is an integration with the hg
If you get this going, please enhance it to use the last tag, not the first (chronologically), since we will first label a release with a tag like
release-pypy2.7-v7.3.0rc4 , then later with a tag like
release-pypy2.7-v7.3.0 for the same node.