Unfortunately, the feature flag mechanism for experimental features
isn't adequate. To avoid some edge cases where Compose might try to
use Synchronized file shares with Desktop when the feature isn't
available, we need to query a new endpoint.
Before we move any of this out of experimental, we need to improve
the integration here with Desktop & Compose so that we get all the
necessary feature/experiment state up-front to reduce the quantity
of IPC calls needed up-front.
For now, there's some intentional redundancy to avoid making this
extra call if we can avoid it. The actual endpoint is very cheap/
fast, but every IPC call is a potential point of of failure, so
it's worth it.
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
Use environment variable for global opt-out and Docker Desktop (if
available) to determine specific experiment states.
In the future, we'll allow per-feature opt-in/opt-out via env vars
as well, but currently there is a single `COMPOSE_EXPERIMENTAL` env
var that can be used to opt-out of all experimental features
independently of Docker Desktop configuration.
Nicolas De Loof
Milas Bowman