sbt中scalaSource和sourceDirectories之间的区别

Question

scalaSource和sourceDirectories之间有什么区别？我有一个非标准的目录结构，源代码位于src/，

此行适用于build.sbt：

scalaSource in Compile := file("src/")

但不是

sourceDirectories in Compile := Seq(file("src/"))

Answer 1

源代码有很多种：Scala和Java，托管和非托管。 sourceDirectories in Compile结合了所有这些，但通常不想直接设置它;通常你会设置更具体的设置，适用于你试图告诉它的位置的特定类型的来源。

请注意baseDirectory.value / "src"比file("src")更正确（它适用于更多场景：子项目，外部项目等）。

Answer 2

我不能告诉你整个情况，有人在sbt上工作可能会在稍后看到这篇文章。 到那时，我就是这样做的理由：inspect

> inspect actual compile:scalaSource
[info] Description:
[info]  Default Scala source directory.
[info] Dependencies:
[info]  compile:sourceDirectory
[info] Reverse dependencies:
[info]  compile:unmanagedSourceDirectories
[info] Delegates:
[info]  compile:scalaSource

> inspect actual compile:sourceDirectories
[info] Description:
[info]  List of all source directories, both managed and unmanaged.
[info] Dependencies:
[info]  compile:unmanagedSourceDirectories
[info]  compile:managedSourceDirectories
[info] Delegates:
[info]  compile:sourceDirectories
[info]  *:sourceDirectories
[info]  {.}/compile:sourceDirectories

现在我就是这样解释的： sourceDirectories ......嗯......完全非正式......

让我们看看这与compile：

之类的内容有何关联

> inspect compile
[info] Dependencies:
[info]  compile:compile::compileInputs  <----
[info]  compile:compile::streams

> inspect compile:compile::compileInputs
[info] Dependencies:
...
[info]  compile:compile::sources  <----
...

> inspect compile:compile::sources
[info] Provided by:
[info]  {file:<build-uri>}<project-id>/compile:sources    
[info] Delegates:
[info]  compile:compile::sources
[info]  compile:sources  <----

此任务已委派，我们可以通过Reverse dependencies查看我们来自inspect actual的位置，定期检查不会显示它们。

> inspect actual compile:sources
[info] Description:
[info]  All sources, both managed and unmanaged.
[info] Reverse dependencies:
[info]  compile:doc
[info]  compile:compile::compileInputs
[info] Dependencies:
[info]  compile:unmanagedSources   <----
[info]  compile:managedSources

> inspect compile:unmanagedSources
[info] Dependencies:
[info]  compile:unmanagedSourceDirectories
...

> inspect compile:unmanagedSourceDirectories
[info] Dependencies:
[info]  compile:javaSource
[info]  compile:scalaSource  <----
[info] Reverse dependencies:
[info]  compile:sourceDirectories
[info]  compile:unmanagedSources

希望这有帮助。