如何为stream任务的日志成员设置SBT logLevel？

Question

你怎么设置logLevel when using streams.value.log in an SBT task？

例如，如何将此任务的日志抑制为qazxsw poi日志？：

Warn

在任务的内部和外部我尝试了各种logLevel设置，例如：

lazy val mainRunner = taskKey[Seq[File]]("Runs a main method")
lazy val mainRunnerSetting = mainRunner := {


  val logger = streams.value.log

  (runner in Compile).value.run(
    mainClass = "com.me.Main",
    classpath = (dependencyClasspath in Compile).value.files,
    log = logger,
    options = Array()
  )
}

...但是当执行此任务时，它始终设置为

logLevel in run in Compile := Level.Warn
logLevel := Level.Warn
logLevel in mainRunner := Level.Warn
logLevel in streams := Level.Warn

Answer 1

不知道你的问题在哪里，但这个Info内容可以正常设置任务的日志级别

build.sbt

其中

val mainRunner = taskKey[Unit]("Print some log")
val runner2 = taskKey[DummyRun]("hold dummy runner")

lazy val root = project
  .in(file("."))
  .settings(
    runner2 := new DummyRun,
    mainRunner := {
      val logger = streams.value.log
      logger.warn("Hello warn")
      logger.info("Hello info")
      logger.debug("Hello debug")
      runner2.value.run(logger)
    },
    (logLevel in mainRunner) := Level.Warn
  )

是DummyRun文件夹中的一个内容

project

输出：

import sbt.Logger

class DummyRun {
  def run(log: Logger): Unit = {
    log.warn("DummyRun warn")
    log.info("DummyRun info")
    log.debug("DummyRun debug")
  }
}