Add no-simulation argument

[gareth-morgan-nv]

Disables the simulation option and exits when OXR creation fails if its set. This allows LOVR to be run in automation and detect the FORM_FACTOR_UNAVAILABLE discussed below without a custom LUA script.

[bjornbytes]

If the form factor is unavailable, lovr.headset.connect will loop infinitely and never return. This would prevent apps from calling lovr.headset.connect once to check if VR is available (potentially falling back to flatscreen or otherwise showing some kind of error).

Maybe you could do something like this in Lua?

while not lovr.headset.connect() do
  print('Failed to set up headset, retrying after 1s...')
  lovr.timer.sleep(1)
end

You could also use the second return value of lovr.headset.connect to specifically match on 'xrGetSystem' or 'FORM_FACTOR_UNAVAILABLE'.

[gareth-morgan-nv]

Maybe you could do something like this in Lua?

Though we have the issue we are running in automation with an arbritary LUA script, so we can't detect the case where the OXR init has failed and its gone into simulation. How about this? I added a --no-simulation option that disables simulation and just exits if OXR fails.

[bjornbytes]

Closing in favor of #946