我对SBT很新，我不知道如何处理来自evicted任务的一个相当可怕的警告：[warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.
完整的任务输出是......
sbt:Sprout> evicted
[info] Updating ...
[info] Done updating.
[warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.
[warn] Found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[warn] * org.scala-lang.modules:scala-xml_2.12:1.1.0 is selected over 1.0.6
[warn] +- org.json4s:json4s-xml_2.12:3.6.3 (depends on 1.1.0)
[warn] +- org.scalatra:scalatra_2.12:2.6.5 (depends on 1.0.6)
[warn] +- com.typesafe.play:twirl-api_2.12:1.3.13 (depends on 1.0.6)
[info] Here are other dependency conflicts that were resolved:
[info] * org.json4s:json4s-core_2.12:3.6.5 is selected over 3.6.3
[info] +- org.json4s:json4s-jackson_2.12:3.6.5 (depends on 3.6.5)
[info] +- org.json4s:json4s-xml_2.12:3.6.3 (depends on 3.6.3)
[info] +- org.scalatra:scalatra-json_2.12:2.6.5 (depends on 3.6.3)
[info] * org.json4s:json4s-scalap_2.12:3.6.5 is selected over 3.6.3
[info] +- org.json4s:json4s-core_2.12:3.6.5 (depends on 3.6.5)
[info] +- org.json4s:json4s-core_2.12:3.6.3 (depends on 3.6.3)
[info] * org.json4s:json4s-ast_2.12:3.6.5 is selected over 3.6.3
[info] +- org.json4s:json4s-core_2.12:3.6.5 (depends on 3.6.5)
[info] +- org.json4s:json4s-core_2.12:3.6.3 (depends on 3.6.3)
[success] Total time: 1 s, completed Apr 13, 2019 12:53:54 PM
“疑似二进制不兼容”听起来很严重。是吗？
是否只有一些排除我可以标记到依赖关系以获得关于正确版本是什么的依赖关系？
SBT依赖关系就像......
libraryDependencies ++= Seq(
"org.scalatra" %% "scalatra" % ScalatraVersion exclude("org.slf4j","slf4j-api"),
"org.scalatra" %% "scalatra-scalatest" % ScalatraVersion % "test",
"org.slf4j" % "slf4j-api" % "1.7.26",
"ch.qos.logback" % "logback-classic" % "1.2.3" % "runtime",
"org.eclipse.jetty" % "jetty-webapp" % "9.4.9.v20180320" % "container",
"javax.servlet" % "javax.servlet-api" % "3.1.0" % "provided",
"org.scalatra" %% "scalatra-json" % ScalatraVersion,
"org.json4s" %% "json4s-jackson" % "3.6.5",
)
理想情况下，我们应该解决电影警告，而不是覆盖，如果可能的话，由于可能引入难以追踪的错误。在这种情况下，如果我们愿意将scalatra和json4s-jackson版本分别放到2.6.4和3.5.2，就像这样：
val ScalatraVersion = "2.6.4"
libraryDependencies ++= Seq(
"org.scalatra" %% "scalatra" % ScalatraVersion exclude("org.slf4j","slf4j-api"),
"org.scalatra" %% "scalatra-scalatest" % ScalatraVersion % "test",
"org.slf4j" % "slf4j-api" % "1.7.26",
"ch.qos.logback" % "logback-classic" % "1.2.3" % "runtime",
"javax.servlet" % "javax.servlet-api" % "3.1.0" % "provided",
"org.scalatra" %% "scalatra-json" % ScalatraVersion,
"org.json4s" %% "json4s-jackson" % "3.5.2",
)
出现此警告是因为org.scalatra:scalatra_2.12:2.6.5和com.typesafe.play:twirl-api_2.12:1.3.13依赖于org.scala-lang.modules:scala-xml_2.12:1.0.6，但org.json4s:json4s-xml_2.12:3.6.3使用org.scala-lang.modules:scala-xml_2.12:1.1.0
为了隐藏此警告，您可以使用dependencyOverrides：
dependencyOverrides += "org.scala-lang.modules" % "scala-xml_2.12" % "1.0.6"
同样，它只会隐藏警告，但不保证您的库与您设置的版本之间的兼容性。