SBT子项目测试类路径之谜答案

【问题标题】：SBT subproject test classpath mysterySBT子项目测试类路径之谜
【发布时间】：2016-07-31 02:45:50
【问题描述】：

我目前正在处理两个 SBT 子项目：persistence 和 silhouette，其中 dependsOn persistence。我遇到了silhouette 测试类路径的问题。

persistence 测试运行良好。该子项目在model.persistence 包中声明了一些类。 silhouette 子项目在同一个包中定义了其他类。在运行测试时，silhouette 子项目中的其他类不会解析这些额外的类。

大部分错误是这样的：

Error:(7, 31) object routes is not a member of package controllers.silhouette
import controllers.silhouette.routes.{ ActivateAccountController => ActivateRoutes, SignInController => SignInRoutes }
Error:(18, 19) object silhouette is not a member of package views.html
import views.html.silhouette.{ emails => htmlEmail }

我可以看到 silhouette 子项目中的 Twirl 视图和路由已生成。 silhouette 子项目没有拾取它们，这很奇怪。

以下是 SBT 子项目定义：

lazy val silhouette: Project = project.in(file("modules/silhouette"))
  .configure(webappConfiguration)
  .dependsOn(persistence)
  .aggregate(persistence)
  .settings(
    libraryDependencies ++= silhouetteDependencies,
    javaOptions            += "-Dplay.http.router=silhouette.Routes",
    javaOptions in Runtime += "-Dconfig.file=../silhouette/conf/silhouette.application.conf",
    javaOptions in Test    += "-Dconfig.file=../silhouette/test/resources/test.silhouette.application.conf"
  )
addCommandAlias("testSilhouette", "; project silhouette; test")

lazy val persistence: Project = project.in(file("modules/persistence"))
  .configure(commonConfiguration)
  .settings(
    libraryDependencies ++= persistenceDependencies,
    javaOptions in Runtime += "-Dconfig.file=../model/src/main/resources/persistence.application.conf",
    javaOptions in Test    += "-Dconfig.file=../model/src/test/resources/test.model.application.conf"
  )

Here is a working project 说明问题。

$ sbt ";project persistence; test"  # works
$ sbt ";project silhouette; test"   # fails as described

【问题讨论】：

标签： playframework-2.0 sbt

【解决方案1】：

项目定义的唯一问题是silhouette 子项目中缺少依赖项。在我尝试在问题子项目上运行 SBT 控制台之前，错误消息并没有让我非常清楚：

$ sbt
[info] Loading global plugins from /home/mslinn/.sbt/0.13/plugins
[info] Loading project definition from /var/work/blah/project
[info] Set current project to Blah (in build file:/var/work/blah/)
[Blah] $ project silhouette
[info] Set current project to silhouette (in build file:/var/work/blah/)
[silhouette] $ console
... compilation errors appeared here...

【讨论】：