[ARROW-2156] [CI] Isolate Sphinx dependencies

• Type: Task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.9.0
• Component/s: Continuous Integration
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18123
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 14/Feb/18 15:32
• Updated: 11/Jan/23 07:19
• Resolved: 15/Feb/18 18:00

Description

In the Travis Python test script, we always install the documentation dependencies. We should only install them when building the docs, since they are not trivial and may take time fetching.

Issue Links

• links to: GitHub Pull Request #1606