为什么sbt总是告诉我在Scala选项中添加-deprecation，而它'；已经有了吗？

以下是我的多项目结构：

myApp
  + build.sbt
  + sub-prj-1
      + build.sbt
  + sub-prj-2
      + build.sbt
  + project
      + Build.scala

我通常在

project/Build.scala

中定义公共设置，如下所示：

import sbt._
import Keys._

object ApplicationBuild extends Build {

  val defaultScalacOptions = Seq(
    "-unchecked", "-deprecation", "-feature", "-language:reflectiveCalls", "-language:implicitConversions",
    "-language:postfixOps", "-language:dynamics", "-language:higherKinds", "-language:existentials",
    "-language:experimental.macros", "-encoding", "UTF-8", "-Xmax-classfile-name", "140")

  val defaultResolvers = Seq(
    "Typesafe releases repository" at "http://repo.typesafe.com/typesafe/releases/"
  )

  val defaultSettings = Defaults.defaultSettings ++ Seq(
    scalaVersion := "2.10.4",
    scalacOptions ++= defaultScalacOptions,
    resolvers ++= defaultResolvers
  )
}

。。。然后我在每个

build.sbt

文件中引用这些常用设置：

name := "myapp"

organization := "Test, Inc."

version := "1.0"

ApplicationBuild.defaultSettings // it looks like common settings defined in
                                 // project/Build.scala are not read...

scalacOptions += "-feature"      // already defined in ApplicationBuild.defaultSettings...
                                 // but if I don't define it here, it doesn't work

lazy val `sub-prj-1` = project.in(file("sub-prj-1"))

lazy val `sub-prj-2` = project.in(file("sub-prj-2"))

lazy val brix = project.in(file(".")).settings(
  publishArtifact := false
).aggregate(
  `sub-prj-1`,
  `sub-prj-2`
)

例如，

scalacOptions+=“-feature”

已在

Build.scala

中定义。。。但是如果我没有在

build.sbt

中定义它，我总是会得到以下警告：

[warn] there were 1 deprecation warning(s); re-run with -deprecation for details
[warn] one warning found

有什么想法吗？我错过什么了吗？这个问题在我安装sbt 0.13.5之后首次出现

编辑

以下是

scalacOptions

的内容：

[info] sub-prj-1/*:scalacOptions
[info]  List(-unchecked, -deprecation, -feature, -language:reflectiveCalls, -language:implicitConversions, -language:postfixOps, -language:dynamics, -language:higherKinds, -language:existentials, -language:experimental.macros, -encoding, UTF-8, -Xmax-classfile-name, 140)
[info] sub-prj-2/*:scalacOptions
[info]  List(-unchecked, -deprecation, -feature, -language:reflectiveCalls, -language:implicitConversions, -language:postfixOps, -language:dynamics, -language:higherKinds, -language:existentials, -language:experimental.macros, -encoding, UTF-8, -Xmax-classfile-name, 140)
[info] myapp/*:scalacOptions
[info]  List(-unchecked, -deprecation, -feature, -language:reflectiveCalls, -language:implicitConversions, -language:postfixOps, -language:dynamics, -language:higherKinds, -language:existentials, -language:experimental.macros, -encoding, UTF-8, -Xmax-classfile-name, 140)

我只能猜测（并指望在出错时更正其他信息），但是

警告

消息来自构建项目（在

项目

下），而不是您的

我使用的是sbt 0.13.6-SNAPSHOT（今天从源代码构建），因此您的里程数可能会有所不同

➜  myApp  xsbt
[info] Loading global plugins from /Users/jacek/.sbt/0.13/plugins
[info] Loading project definition from /Users/jacek/sandbox/common-settings/myApp/project
[info] Updating {file:/Users/jacek/sandbox/common-settings/myApp/project/}myapp-build...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/jacek/sandbox/common-settings/myApp/project/target/scala-2.10/sbt-0.13/classes...
[warn] there were 1 deprecation warning(s); re-run with -deprecation for details
[warn] one warning found
[info] Set current project to brix (in build file:/Users/jacek/sandbox/common-settings/myApp/)

当我试图重现您的案例时，我得到了

项目下生成定义的消息：

[warn] there were 1 deprecation warning(s); re-run with -deprecation for details
[warn] one warning found

它们是你想要摆脱的吗？如果是，请继续阅读。否则，请在问题中添加其他信息。谢谢

例如，
project
下面是另一个构建定义（依此类推）

为了消除这些消息，您应该按照他们的建议，将
-deprecation
添加到相应项目的构建定义中。将以下内容添加到项目/build.sbt：

scalacOptions += "-deprecation"

这样，
重新加载
，谜团就被揭开了

➜  myApp  xsbt
[info] Loading global plugins from /Users/jacek/.sbt/0.13/plugins
[info] Loading project definition from /Users/jacek/sandbox/common-settings/myApp/project
[info] Compiling 1 Scala source to /Users/jacek/sandbox/common-settings/myApp/project/target/scala-2.10/sbt-0.13/classes...
[warn] /Users/jacek/sandbox/common-settings/myApp/project/Build.scala:15: value defaultSettings in object Defaults is deprecated: 0.13.2
[warn]   val defaultSettings = Defaults.defaultSettings ++ Seq(
[warn]                                  ^
[warn] one warning found
[info] Set current project to brix (in build file:/Users/jacek/sandbox/common-settings/myApp/)
>

:

要解决这个问题，你应该阅读这篇文章。
你能在sbt控制台中
显示Scala选项
并将输出添加到问题中吗？刚好在我回答的时候：）我想我可能帮了忙。非常感谢你详尽的回答；-）
@deprecated("0.13.2", "Default settings split into `coreDefaultSettings` and IvyModule/JvmModule plugins.")