SBT 组装失败

Question

我正在运行通过 intellij 进行 spark 作业。作业执行并给我输出。我需要将此作业作为 jar 文件发送到服务器并运行，但是当我尝试执行 sbt assembly 时，它会抛出以下错误：

 [error] Not a valid command: assembly
 [error] Not a valid project ID: assembly
 [error] Expected ':' (if selecting a configuration)
 [error] Not a valid key: assembly
 [error] assembly

我的 sbt 版本是 0.13.8

下面是我的 build.sbt 文件：

import sbt._, Keys._
name := "mobilewalla"
version := "1.0"
scalaVersion := "2.11.7"
libraryDependencies ++= Seq("org.apache.spark" %% "spark-core" % "2.0.0",
"org.apache.spark" %% "spark-sql" % "2.0.0")

我在项目目录下添加了一个文件assembly.sbt。它包含：

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")

我在这里错过了什么

Answer 1

为了assemble 将多个jar 变成一个你需要在项目目录下的plugins.sbt 中添加下面的插件。

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")

如果您需要自定义 assembled jar 以触发特定的 MainClass 以示例 assembly.sbt

import sbtassembly.Plugin.AssemblyKeys._

Project.inConfig(Compile)(baseAssemblySettings)

mainClass in (Compile, assembly) := Some("<main application name  with package path>")

jarName in (Compile, assembly) := s"${name.value}-${version.value}-dist.jar"
//below is merge strategy to make what all file need to exclude or include
mergeStrategy in (Compile, assembly) <<= (mergeStrategy in (Compile, assembly)) {
  (old) => {
    case PathList(ps @ _*) if ps.last endsWith ".html" =>MergeStrategy.first
    case "META-INF/MANIFEST.MF" => MergeStrategy.discard
    case x => old(x)
  }
}

Answer 2

将这些行添加到您的 build.sbt

assemblyMergeStrategy in assembly := {
  case PathList("META-INF", xs @ _*) => MergeStrategy.discard
  case x => MergeStrategy.first
}
mainClass in assembly := Some("com.SparkMain")
resolvers += "spray repo" at "http://repo.spray.io"
assemblyJarName in assembly := "streaming-api.jar"

并将这些行包含在您的 plugins.sbt 文件中

addSbtPlugin("io.spray" % "sbt-revolver" % "0.7.2")

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.13.0")

SBT 组装失败

SBT assembly falis

scala

intellij-idea

apache-spark

sbt

sbt-assembly