Play Framework编译发出警告，如何查看警告? [英] Play Framework compile giving warnings, how to view them?

问题描述

如何从控制台在Play应用上运行compile时看到警告?

How do I see the warnings created during running compile on my Play app from the console?

[info] Done updating.
[info] Compiling 13 Scala sources and 2 Java sources to C:\...\target\scala-2.10\classes...
[warn] there were 1 feature warning(s); re-run with -feature for details
[warn] one warning found
[success] Total time: 13 s, completed 13-Feb-2014 00:43:23

我尝试先运行clean然后运行compile -feature，但这只会引发错误.

I tried running clean then compile -feature but that just threw errors.

我正在使用:

       _
 _ __ | | __ _ _  _
| '_ \| |/ _' | || |
|  __/|_|\____|\__ /
|_|            |__/

play 2.2.1 built with Scala 2.10.2 (running Java 1.7.0_51), http://www.playframework.com

推荐答案

请注意，这与标准警告(默认情况下会正常显示)略有不同.

As a note, this is a little bit different from a standard warning (which will show up just fine by default).

scala编译器中发生了一个功能警告；这就是有1个功能警告"消息的来源.

There's a feature warning happening in the scala compiler; that's where that "there were 1 feature warning(s)" message comes from.

您需要将-feature作为scalacOptions的一部分传递到scalac中，这可以通过在Build.scala中添加以下内容来实现:

You need to pass -feature into scalac as part of scalacOptions which can be done by adding something like the following to your Build.scala:

val main = play.Project(appName, appVersion, appDependencies).settings(
  scalacOptions += "-feature"
)

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