[tor-bugs] #24851 [Core Tor/Fallback Scripts]: create a script that generates the authority format from the authorities in the current consensus

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#24851: create a script that generates the authority format from the authorities in
the current consensus
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 Reporter:  teor                       |          Owner:  (none)
     Type:  enhancement                |         Status:  new
 Priority:  Medium                     |      Milestone:  Tor:
                                       |  0.3.3.x-final
Component:  Core Tor/Fallback Scripts  |        Version:
 Severity:  Normal                     |     Resolution:
 Keywords:  tor-dirauth                |  Actual Points:
Parent ID:  #24818                     |         Points:  0.5
 Reviewer:                             |        Sponsor:
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Comment (by teor):

 Here is the specification for the authority list:
 https://github.com/teor2345/torspec/blob/dir-list/dir-list-spec.txt#L254

 The data should be the same as the data in this list:
 https://gitweb.torproject.org/tor.git/tree/src/or/config.c#n1079

 But it will end up looking a bit like this list:
 https://gitweb.torproject.org/tor.git/tree/src/or/fallback_dirs.inc#n27

 And we need to get the data from the current Tor consensus using stem, so
 it's easy to update when it changes:
 https://stem.torproject.org/api/descriptor/remote.html#stem.descriptor.remote.get_consensus

 It's ok to just get the fields right in a first draft, and then work out
 the exact order and formatting later.

 Replying to [ticket:24851 teor]:
 > We need to make sure we also:
 > * apply address overrides
 > * make sure the details match the current list

 The address overrides will become obvious when we check against the
 current list.

 > * check that all supported Tor versions can parse the list (existing
 unit tests)

 We can do this by replacing src/or/auth_dirs.inc with the generated list,
 then running Tor's "make check".
 This will only work once #24854 is completed.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24851#comment:1>
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