sbt - 为什么我的 sourceDirectories 设置在 sbt 中不起作用？

Question

我正在阅读 SBT Getting Started指导。该页面显示 sourceDirectories设置为例。为了自己尝试，我将以下内容放入我的 build.sbt文件，用于基本的“hello world”项目。

sourceDirectories in Compile := Seq(file("other"))

(附加 += 或 ++= 也不起作用。)

我在 <base-dir>/other 中有源文件并在 <base-dir>/src/main/scala .我跑了 sbt并输入 compile .它忽略了设置:

> compile
[info] Compiling 1 Scala source to /Learning/Scala/proj1/target/scala-2.9.2/classes...
[error] /Learning/Scala/proj1/src/main/scala/hello.scala:7: not found: value Foo
[error]     println(Foo.foo)

Foo对象在 other 中的 foo.scala 中定义源目录。

我错过了什么？

Answer 1

tl;博士 The answer by @schleichardt是有效的 - 您需要将以下内容添加到 build.sbt文件:

unmanagedSourceDirectories in Compile += file("other")

解释归结为检查 compile 的依赖关系。任务。使用 inspect tree compile找出他们。

[proj1]> inspect tree compile
[info] compile:compile = Task[sbt.inc.Analysis]
[info]   +-compile:compile::compileInputs = Task[sbt.Compiler$Inputs]
[info]   | +-compile:scalacOptions = Task[scala.collection.Seq[java.lang.String]]
[info]   | +-compile:sources = Task[scala.collection.Seq[java.io.File]]
[info]   | +-*/*:sourcePositionMappers = Task[scala.collection.Seq[scala.Function1[xsbti.Position, scala.Option[xsbti.Position]]]]
[info]   | +-*/*:maxErrors = 100
[info]   | +-*:compilers = Task[sbt.Compiler$Compilers]
[info]   | +-compile:compile::streams = Task[sbt.std.TaskStreams[sbt.Init$ScopedKey[_ <: Any]]]
[info]   | | +-*/*:streamsManager = Task[sbt.std.Streams[sbt.Init$ScopedKey[_ <: Any]]]
[info]   | |
[info]   | +-compile:incCompileSetup = Task[sbt.Compiler$IncSetup]
[info]   | +-*/*:compileOrder = Mixed
[info]   | +-compile:dependencyClasspath = Task[scala.collection.Seq[sbt.Attributed[java.io.File]]]
[info]   | +-compile:classDirectory = target/scala-2.10/classes
[info]   | +-*/*:javacOptions = Task[scala.collection.Seq[java.lang.String]]
[info]   |
[info]   +-compile:compile::streams = Task[sbt.std.TaskStreams[sbt.Init$ScopedKey[_ <: Any]]]
[info]     +-*/*:streamsManager = Task[sbt.std.Streams[sbt.Init$ScopedKey[_ <: Any]]]
[info]

如您所见，任务依赖于 compile:sources任务。任务反过来取决于 compile:unmanagedSources使用 compile:unmanagedSourceDirectories 的任务环境。

[proj1]> inspect tree compile:sources
[info] compile:sources = Task[scala.collection.Seq[java.io.File]]
[info]   +-compile:unmanagedSources = Task[scala.collection.Seq[java.io.File]]
[info]   | +-compile:unmanagedSourceDirectories = List(/Users/jacek/sandbox/stackoverflow/proj1/src/main/scala, /Users/jacek/sandbox/stackoverflow/proj1/src/main/java, /Users/..
[info]   | | +-compile:javaSource = src/main/java
[info]   | | | +-compile:sourceDirectory = src/main
[info]   | | |   +-*:sourceDirectory = src
[info]   | | |   | +-*:baseDirectory = /Users/jacek/sandbox/stackoverflow/proj1
[info]   | | |   |   +-*:thisProject = Project(id: proj1, base: /Users/jacek/sandbox/stackoverflow/proj1, aggregate: List(), dependencies: List(), configurations: List(compile..
[info]   | | |   |
[info]   | | |   +-compile:configuration = compile
[info]   | | |
[info]   | | +-compile:scalaSource = src/main/scala
[info]   | | | +-compile:sourceDirectory = src/main
[info]   | | |   +-*:sourceDirectory = src
[info]   | | |   | +-*:baseDirectory = /Users/jacek/sandbox/stackoverflow/proj1
[info]   | | |   |   +-*:thisProject = Project(id: proj1, base: /Users/jacek/sandbox/stackoverflow/proj1, aggregate: List(), dependencies: List(), configurations: List(compile..
[info]   | | |   |
[info]   | | |   +-compile:configuration = compile
[info]   | | |
[info]   | | +-*:baseDirectory = /Users/jacek/sandbox/stackoverflow/proj1
[info]   | |   +-*:thisProject = Project(id: proj1, base: /Users/jacek/sandbox/stackoverflow/proj1, aggregate: List(), dependencies: List(), configurations: List(compile, runt..
[info]   | |
[info]   | +-*/*:excludeFilter = sbt.SimpleFileFilter@7ced8ea7
[info]   | +-*:baseDirectory = /Users/jacek/sandbox/stackoverflow/proj1
[info]   | +-*/*:unmanagedSources::includeFilter = sbt.SimpleFilter@1beb6bba
[info]   | +-*/*:sourcesInBase = true
[info]   |
[info]   +-compile:managedSources = Task[scala.collection.Seq[java.io.File]]
[info]     +-compile:sourceGenerators = List()
[info]

compile:unmanagedSourceDirectories设置引用“非托管源目录，其中包含手动创建的源。”

[proj1]> inspect compile:unmanagedSourceDirectories
[info] Setting: scala.collection.Seq[java.io.File] = List(/Users/jacek/sandbox/stackoverflow/proj1/src/main/scala, /Users/jacek/sandbox/stackoverflow/proj1/src/main/java, /Users/jacek/sandbox/stackoverflow/proj1/other)
[info] Description:
[info]  Unmanaged source directories, which contain manually created sources.
[info] Provided by:
[info]  {file:/Users/jacek/sandbox/stackoverflow/proj1/}proj1/compile:unmanagedSourceDirectories
[info] Defined at:
[info]  (sbt.Defaults) Defaults.scala:161
[info]  /Users/jacek/sandbox/stackoverflow/proj1/build.sbt:1
[info] Dependencies:
[info]  compile:javaSource
[info]  compile:scalaSource
[info]  *:baseDirectory
[info] Reverse dependencies:
[info]  compile:unmanagedSources
[info]  compile:sourceDirectories
[info] Delegates:
[info]  compile:unmanagedSourceDirectories
[info]  *:unmanagedSourceDirectories
[info]  {.}/compile:unmanagedSourceDirectories
[info]  {.}/*:unmanagedSourceDirectories
[info]  */compile:unmanagedSourceDirectories
[info]  */*:unmanagedSourceDirectories
[info] Related:
[info]  test:unmanagedSourceDirectories

设置为 scala.collection.Seq[java.io.File]键入并将元素附加到 seq，您可以使用 +=方法。

话虽如此， build.sbt文件应如下所示:

unmanagedSourceDirectories in Compile += (baseDirectory / "other").value

您不必使用 baseDirectory设置，但它使基本目录显式。