scala - -Ywarn-unused-import 在 Play 路线文件上触发

Question

我希望能够使用 -Xfatal-warnings 和 -Ywarn-unused-import，问题是编译器在文件上触发错误包含我的应用程序的 Play 路线:

[error] /path/to/app/conf/routes: Unused import
[error] /path/to/app/conf/routes: Unused import
[error] /path/to/app/conf/routes:1: Unused import
[error] GET        /document/:id        my.app.controllers.MyController.getById(id: Int)

其他路线也是如此。

是否可以告诉 scalac 忽略文件？

Scala 版本为 2.11.8。

Answer 1

我已经为 Play 2.8.11 提出了 Scala 2.13.7 的工作解决方案(不需要任何插件)。查看这些示例并根据您的需求进行调整:

scalacOptions ++= Seq(
    "-Wconf:cat=unused-imports&site=.*views.html.*:s", // Silence import warnings in Play html files
    "-Wconf:cat=unused-imports&site=<empty>:s", // Silence import warnings on Play `routes` files
    "-Wconf:cat=unused-imports&site=router:s", // Silence import warnings on Play `routes` files
    "-Wconf:cat=unused-imports&site=v1:s", // Silence import warnings on Play `v1.routes` files
    "-Wconf:cat=unused-imports&site=v2:s", // Silence import warnings on Play `v2.routes` files
    "-Wconf:cat=unused-imports&site=views.v1:s", // Silence import warnings on Play `views.v1.routes` files
    "-Wconf:cat=deprecation&site=controllers\\.v1.*&origin=scala.util.Either.right:s", // Silence deprecations in generated Controller classes
    "-Wconf:cat=deprecation&site=.*v1.Routes.*&origin=scala.util.Either.right:s"
  ) // Silence deprecations in generated Controller classes

如果您想了解更多，请点击 look on this documentation并在编译器消息输出中添加详细信息

scalacOptions += "-Wconf:any:wv",

专业提示:仅在 CI 内未使用的编译失败

scalacOptions ++= {
  // Mark unused errors as info for local development (due to -Werror usage)
  if (insideCI.value) Seq.empty else Seq("-Wconf:cat=unused:i")
},