[core-workflow] GitHub migration update for 2016-12-03

[Brett Cannon]

On Mon, 5 Dec 2016 at 04:14 Antoine Pitrou <solipsis at pitrou.net> wrote:

> On Sun, 04 Dec 2016 00:40:49 +0000
> Brett Cannon <brett at snarky.ca> wrote:
> >    - I got the code for hg.python.org/hglookup
> >       - Asking if there's any reason I can't post it publicly
>
> None than I can think of.
>
> >       - Need to figure out the best way to extract all commit IDs from a
> >       Mercurial repository
>
> Probably iterate over all entries in the revlog and inspect the "extra"
> field as is done in hglookup?  That way you can build a static mapping
> of SVN rev -> hg changeset ID, and save it e.g. to a file.
>
> >       - Need to update the code to use the commit IDs (both 12 and 40
> >       character lengths) for linking to hg commits
> >       - Need to update the code to accept 10 or longer hashes from git
> >       (default used to be 7, but git 2.11 now calculates the shortest,
> >       unamibiguous hash and CPython is big enough to need 10 characters)
>
> I'm not sure I understand those two points, but that probably doesn't
> matter.
>

hg.python.org/lookup says any hexadecimal number that is 12 or 40 digits is
an hg commit ID, but git uses 10 or 40 digits for our repo for a commit
hash. The 10 digit and 12 digit lengths don't clash but the 40 digit one
does.
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