Inconsistent log level of eviction warning summary

[bigwheel]

Summary

Eviction warning summary shows in [warn] log level even with binary compatible conflicts.

Detail

Eviction warning summary is:

[warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.

This is introduced in sbt 1.2.0:

Displays only the eviction warning summary by default, and make it configurable using ThisBuild / evictionWarningOptions. lm211 and #3947 by @exoego

My test

I tested update and evicted command in sbt 1.1.6 and 1.2.8.

source code to reproduce: https://github.com/bigwheel/sbt-warn-eviction-summary-inconsistency-behavior

Result:

	1.1.6 with b-compatible	1.1.6 with b-incompatible	1.2.8 with b-compatible	1.2.8 with b-incompatible
Eviction warning summary shows in update command	no	no	yes	yes
Log level of evicted command	info	warn	info	warn

Problem

I understand evicted command prints binary compatible conflict as [info] level and binary incompatible conflict as [warn] because binary compatible conflict is no problem in many case.
However, if there are only binary compatible conflicts Eviction warning summary shows in [warn] level in contrast to evicted command prints only in [info] level.

Solution

I figured out some solutions.

1. Eviction warning sumary shows only there are binary incompatible conflicts

https://github.com/sbt/librarymanagement/blob/96a3293c/core/src/main/scala/sbt/librarymanagement/EvictionWarning.scala#L317

if ((a.options.warnEvictionSummary || a.reportedEvictions.nonEmpty) && a.allEvictions.nonEmpty) {

to

if (a.options.warnEvictionSummary && a.reportedEvictions.nonEmpty) {

I think this is best fix.

2. Eviction warning sumary with info level

This is not easy fix because it seems like we cannot select log level in there.

3. Change default EvictionWarningOptions from summary to empty

Easy fix.

Conclusion

Please tell me how to fix this.
After that, I will create Pull Request for it.

Related to

scala - addSbtPlugin(...) cause eviction warning but 'evicted' command shows nothing - Stack Overflow

[eed3si9n]

Thanks @bigwheel for the research!
Your first option seems reasonable. Let's try that.