Builds#build_artifacts fails to retrieve artifacts w/ TeamCity API 9.X

[fortinmike]

It seems like the root key in JSON output for TeamCity artifacts has changed in v9.X; it used to be "files", now it is "file". This causes teamcity-ruby-client to always return nil from Builds#build_artifacts when using the v9.X API.

https://gist.github.com/fortinmike/ac80adfbade2b2d5e0c7

I suppose this is a bug in TeamCity's API as the XML output stays the same from v8.X to v9.X. Still, this makes teamcity-ruby-client fail to fetch artifacts when using the default non-versioned API endpoint. Took me some time to figure it out.

Maybe falling back like this would be a reasonable workaround?

def build_artifacts(build_id)
    response = get("builds/#{build_id}/artifacts")
    response['files'] || response['file']
end

I have not noticed other issues with teamcity-ruby-client using the v9.X API apart from that.