scala 如何从另一个 sbt 项目引用外部 sbt 项目？
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How to reference external sbt project from another sbt project?
提问by Diego
I have the following setup of a Scala application and a common core library: root
我有以下 Scala 应用程序和公共核心库的设置：root
-> /ApplicationA
-> /project
-> /build.sbt
-> /CoreLibrary
-> /project
-> /build.sbt
I want to add a reference from ApplicationA to CoreLibrary à la Eclipse project reference, so that every time CoreLibrary changes ApplicationA is built as well. I′ve tried the following contents of build.Scala for ApplicationA:
我想添加一个从 ApplicationA 到 CoreLibrary à la Eclipse 项目引用的引用，这样每次 CoreLibrary 更改时 ApplicationA 也会被构建。我已经为 ApplicationA 尝试了 build.Scala 的以下内容：
val core = Project(
id = "platform-core",
base = file("../CoreLibrary"))
val main = Project(id = "application, base = file(".")).dependsOn(core)
However, when compiling ApplicationA SBT complains that a dependency can only be a subdirectory!!:
但是，在编译 ApplicationA SBT 时会抱怨依赖项只能是子目录！！：
java.lang.AssertionError: assertion failed: Directory C:\git\CoreLibrary is not contained in build root C:\git\ApplicationA
This seems completely straightforward, what's the correct way of having this project dependency?
这看起来很简单，拥有这个项目依赖的正确方法是什么？
采纳答案by jwinandy
You can do a source dependency on your project like that :
您可以像这样对您的项目进行源依赖：
lazy val core = RootProject(file("../CoreLibrary"))
val main = Project(id = "application", base = file(".")).dependsOn(core)
I have a working example with a multimodule play build : https://github.com/ahoy-jon/play2MultiModule/blob/master/playapp/project/Build.scala
我有一个多模块播放构建的工作示例：https: //github.com/ahoy-jon/play2MultiModule/blob/master/playapp/project/Build.scala
But I think the proper way (it depends of your context) of doing it is to create a
但我认为这样做的正确方法（这取决于您的上下文）是创建一个
-> /project/
-> Build.scala
-> /ApplicationA
-> /project
-> /build.sbt
-> /CoreLibrary
-> /project
-> /build.sbt
referencing the two projects and the dependencies between them.
引用这两个项目以及它们之间的依赖关系。
回答by Maxence
With sbt 0.12.1 it seems possible to get a simple reference to a project :
使用 sbt 0.12.1 似乎可以获得对项目的简单引用：
I used ProjectRefinstead of RootProject
我用ProjectRef而不是RootProject
http://www.scala-sbt.org/0.12.1/api/sbt/ProjectRef.html
http://www.scala-sbt.org/0.12.1/api/sbt/ProjectRef.html
ProjectRef(file("../util-library"), "util-library")
sbt-eclipse also works.
sbt-eclipse 也可以。
回答by Mustafa
Since sbt 0.13, you may create multi-project definitions directly in .sbtwithout needing a Build.scalafile.
从sbt 0.13 开始，您可以直接在其中创建多项目定义.sbt而无需Build.scala文件。
So adding the following to ApplicationA/project/build.sbtwould be sufficient.
因此，将以下内容添加到 ApplicationA/project/build.sbt就足够了。
lazy val core = RootProject(file("../CoreLibrary"))
val main = Project(id = "application", base = file(".")).dependsOn(core)
