This follows the same approach as the wasm feature: by default, importers
of
github.com/open-policy-agent/opa/rego
github.com/open-policy-agent/opa/topdown
will not get a transitive dependency on the otel libraries.
In terms of functionality, nothing changes for the server and runtime.
Signed-off-by: Stephan Renatus <stephan.renatus@gmail.com>
Users of OPA as a library are concerned about big binary blobs in their vendor/
directories. Even more so if they don't use them. This is the case for anyone
using OPA as library, but not using the wasm-backed evaluation feature.
With this change, importers of any packages other than `server` and `cmd`
will have to explicitly opt-in to using wasm evaluation features by having an
underscore import somewhere:
import _ "github.com/open-policy-agent/opa/features/wasm"
Fixes#3545.
Signed-off-by: Stephan Renatus <stephan.renatus@gmail.com>
Johan Fylling