Do not use silencer scalac params when running doc task

[seglo]

Purpose

The travis build fails when publishing artifacts for google-cloud-pub-sub because the doc task doesn't have the silencer plugin in scope. For some reason this is only an issue in the 2.12 and 2.13 cross builds.

Ex)

[error] (google-cloud-pub-sub-grpc / Compile / doc) Scaladoc generation failed

https://travis-ci.com/akka/alpakka/jobs/273152362#L1611
https://travis-ci.com/akka/alpakka/jobs/273152363#L2199

References

• Issue created in Google Cloud Pub/Sub gRPC: latest versions #2050
• Ref: [error] bad option: -P:silencer:checkUnused in Compile / doc ghik/silencer#40

Changes

• Only apply silencer scalac parameters in Compile, compile targets.

[ennru]

LGTM.

[seglo]

Qualifying the scope to Compile will skip applying the parameter for Test scope. Instead, I've added a filter to remove the parameter when running the doc task, as mentioned in ghik/silencer#40 .

[seglo]

Transient failures

• [Failure] SftpWithProxyStageTest.move failed: java.util.concurrent.TimeoutException #2073
• Failed: MqttFlowSpec mqtt server flow should receive a bidirectional connection and a subscription to a topic #1549

[seglo]

After I merged I found that this can be simplified by omitting the intask (compile) part of the scoping.

Compile / scalacOptions += "-P:silencer:pathFilters=src_managed"