sbt多项目未定义的设置(sbt multi project undefined settings)

我在SBT有一个多项目设置。在我们的构建过程中，项目中的文件由CI自动更新。它包含应用程序版本。

但是，每当我尝试加载应用程序设置时，都会收到类似于以下内容的错误：

[error] References to undefined settings: [error] [error] module1/*:appProperties from module1/*:version (/Users/jespeno/workspace/multi-module/build.sbt:10) [error] [error] module2/*:appProperties from module2/*:version (/Users/jespeno/workspace/multi-module/build.sbt:10)

这是我的sbt文件的样子：

val appProperties = settingKey[Properties]("app version") appProperties := { val prop = new Properties() IO.load(prop, new File("version.properties")) prop } val commonSettings = Seq( version := appProperties.value.getProperty("project.version"), scalaVersion := "2.11.7" ) lazy val root = (project in file(".")).settings(commonSettings: _*) .aggregate(module1, module2) .settings( name := appProperties.value.getProperty("project.name") ) lazy val module1 = (project in file("./modules/module1")) .settings(commonSettings: _*) .settings( name := "module1" ) lazy val module2 = (project in file("./modules/module2")) .settings(commonSettings: _*) .settings( name := "module2" )

这是我的version.properties ：

project.name="multi-module" project.version="0.0.1"

有趣的是，根项目能够正确加载设置：如果我删除子模块，则构建正确启动。我使用的是SBT版本0.13.8 。

I have a multi project setup in SBT. In our build process there's a file in the project that is automatically updated by our CI. It contains the app version.

However, whenever I try to load the app settings, I get an error similar to the following:

[error] References to undefined settings: [error] [error] module1/*:appProperties from module1/*:version (/Users/jespeno/workspace/multi-module/build.sbt:10) [error] [error] module2/*:appProperties from module2/*:version (/Users/jespeno/workspace/multi-module/build.sbt:10)

This is what my sbt file looks like:

val appProperties = settingKey[Properties]("app version") appProperties := { val prop = new Properties() IO.load(prop, new File("version.properties")) prop } val commonSettings = Seq( version := appProperties.value.getProperty("project.version"), scalaVersion := "2.11.7" ) lazy val root = (project in file(".")).settings(commonSettings: _*) .aggregate(module1, module2) .settings( name := appProperties.value.getProperty("project.name") ) lazy val module1 = (project in file("./modules/module1")) .settings(commonSettings: _*) .settings( name := "module1" ) lazy val module2 = (project in file("./modules/module2")) .settings(commonSettings: _*) .settings( name := "module2" )

Here's my version.properties:

project.name="multi-module" project.version="0.0.1"

The interesting thing is, the root project is able to load the settings correctly: if I remove the sub-modules, the build starts correctly. I'm using SBT version 0.13.8.