我正在使用新的AutoPlugin机制为sbt编写代码生成插件。我需要修改sourceGenerators in Compile
设置,但是当我从插件中执行此操作时它不起作用。调用编译后,屏幕上不会打印任何内容。
但是,如果我采用行sourceGenerators in Compile <+= (mySourceGenerator in Compile)
并将其移动到项目的build.sbt
突然修改sourceGenerators in Compile
设置,当我运行编译任务时,将写入消息屏幕。
我有什么东西在那里失踪吗?插件的代码在这里:
package net.lopezbobeda.plugin
import sbt._
import Keys._
import java.io.{ File, Writer }
object MyPlugin extends AutoPlugin {
// by defining autoImport, the settings are automatically imported into user's `*.sbt`
object autoImport {
// configuration points, like the built-in `version`, `libraryDependencies`, or `compile`
lazy val mySourceGenerator = taskKey[Seq[File]]("Generate")
// default values for the tasks and settings
lazy val baseXtendPluginSettings: Seq[Def.Setting[_]] = Seq(
mySourceGenerator in Compile := {
val s: TaskStreams = streams.value
s.log.info("Generating! " + sourceManaged.value)
Nil
},
sourceGenerators in Compile <+= (mySourceGenerator in Compile) // if I put this line in build.sbt everything works as expected.
)
}
override def trigger = allRequirements
import autoImport._
override val projectSettings = baseXtendPluginSettings
}
答案 0 :(得分:5)
问题是JVM插件重置了sourceGenerators设置。解决方案只是添加:
override def requires = JvmPlugin
我在另一个问题中找到了解决方案: