There are some config variables (at the moment only WikispeechServerUrl) that needs to be set, but for which there are no obvious default values. Figure out what to set these to in extensions.json, to make sure that whoever is setting up the extension knows that they need to be set.
Describe the rules for how we handle these and solve this for the explicit case of WikispeechServerUrl.
For WikispeechServerUrl
The sensible default value would be null and we would have to introduce a check to see if the config value is defined.
If not you would want a warning before the pageload calls the Segmenter/Cleaner. There should be no need to check that this is set for the existing API calls.
The warning should at the very least be a console warning but we could also consider a visible warning e.g. dialogue box
I have added a bit of manifest v2 descriptions, committed for review in T243376.
"config": {
"WikispeechServerUrl": {
"description": "URL to location of TTS-server. Developer installation available at http://wikispeech-tts-dev.wmflabs.org/ ",
"value": ""
},Mentioned in SAL (#wikimedia-cloud) [2020-02-26T14:26:33Z] <kalle_> Deploy latest from Git master: 20d9123, d8447da (T206485), f1f1143, 07e603c, cbfb487 (T179229), 0a7a488, bcd8507, 3225fe2, ebbad49 (T234597), b831a16, 879bc31, 52931bc, 24aa5aa, 93c9f0b, 90df124 (T243384), 1dbe811, 8a3cc99 (T244345), 624274d (T167300, T243376)
Based on this an WikispeechServerUrl being the only one needing better defaults I consider this resolved