增强编译类后，SBT包生成空JAR。

Question

我是一个SBT插件的作者：https://github.com/atais/sbt-eclipselink-static-weave

它的目的是使用提供的增强编译的类。

为了实现这一步，我已经用以下方法覆盖了compile步骤：

override def projectSettings: Seq[Def.Setting[_]] = Seq(
    ... 
    // https://www.scala-sbt.org/1.0/docs/Howto-Dynamic-Task.html#build.sbt+v2
    compile in Compile := Def.taskDyn {
      val c = (compile in Compile).value
      Def.task {
        (copyResources in Compile).value // we need to copy META-INF folder first, https://github.com/sbt/sbt/issues/3934
        weaveTask.value
        c
      }
    }.value
  )

问题

使用这个插件正确编译的项目，但是它们可能会在package或publish 期间生成一个空jar，如果编译的源代码事先不可用的话。

您可能需要检查我的拉请求，在那里我准备了一个测试项目和测试场景。https://github.com/atais/sbt-eclipselink-static-weave/pull/2

详细信息

我试过打印所有的设置和映射，但它们看起来都很好。

然而，我发现，Package.Configuration步骤正在使用cacheStoreFactory: CacheStoreFactory，我认为这是我的问题。

在函数makeJar(sources.toSeq, jar.file, manifest, log)期间，有一个在第一次运行时给出空结果的log.debug(sourcesDebugString(sources))：

[info] Finished EclipseLink static weaving in 610 ms.
[info] Packaging /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/test_2.12-0.1.0-SNAPSHOT.jar ...
[debug] Input file mappings:
[debug]   

但是正确地列出了第二个文件：

[info] Finished EclipseLink static weaving in 559 ms.
[info] Packaging /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/test_2.12-0.1.0-SNAPSHOT.jar ...
[debug] Input file mappings:
[debug]         META-INF/persistence.xml
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/META-INF/persistence.xml
[debug]         META-INF
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/META-INF
[debug]         com
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com
[debug]         META-INF/orm-rtb.xml
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/META-INF/orm-rtb.xml
[debug]         com/github/atais/entity
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com/github/atais/entity
[debug]         com/github
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com/github
[debug]         com/github/atais
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com/github/atais
[debug]         com/github/atais/entity/EntityB.class
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com/github/atais/entity/EntityB.class
[debug]         com/github/atais/entity/EntityA.class
[debug]           /home/atais/Documents/sbt-eclipselink-static-weave/sbt-test/target/scala-2.12/classes-weaved/com/github/atais/entity/EntityA.class

在此运行期间，SBT不会重新启动。这是我第二次打电话给包裹。

我怎么能第一次生产出合适的罐子呢？

Answer 1

好吧，原来我应该用

productDirectories in Compile := Seq(weavedClassesDest.value),

而不是

products in Compile := Seq(weavedClassesDest.value),

现在它似乎起作用了