The ubuntu-docs image doesn't enable S3 nor Flight when building the C++ and Python docs.
https://arrow.apache.org/docs/python/api/flight.html
https://arrow.apache.org/docs/python/api/filesystems.html
Reporter: Antoine Pitrou / @pitrou
Assignee: Antoine Pitrou / @pitrou
PRs and other links:
Note: This issue was originally created as ARROW-12262. Please see the migration documentation for further details.