Allow setting a few global defaults for file source plugin types.

[jmchilton]

• xref section "Underlying Plugin Improvements" of "Next Steps to Bring Your Own Storage and Data" Next Steps to Bring Your Own Storage and Data #18128.
• xref Bring your own file sources: Add the WebDAV template and configuration #18598.

The idea is we don't want users having to define the technical details of plugin specification that are related to the infrastructure of Galaxy and not the remote data source. Even allowing them in the templates is kind of heavy - so being able to just set them in Galaxy's config is sort of ideal.

Even outside the context of user defined file sources - I think this is kind of an important point. Take for example - https://github.com/galaxyproject/usegalaxy-playbook/blob/main/env/common/templates/galaxy/config/file_sources_conf.yml.j2 - it is very heavy and error prone that the "listings_expiry_time" parameter needs to be defined in each plugin.

How to test the changes?

(Select all options that apply)

• This is a refactoring of components with existing test coverage.

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[jmchilton]

I also fixed up and expanded some webdav tests. Directions are at the top of the test_webdav.py if you want to run them.

[davelopez]

Thank you so much John!
I wouldn't expect we would add more configuration values to the config schema... I thought we were trying to avoid adding more, but I'm not an admin, so I'm not complaining 😝

You may need to run make config-rebuild

[mvdbeek]

Sorry about the nitpicking here ... I guess I would only insist on flipping the use_temp_files setting to true.

[mvdbeek]

Thank you @jmchilton!