scala - 为什么 sbt 程序集失败并显示 "Not a valid command: assembly"？

Question

我将 Spark 安装到 C:\Spark1_6\spark-1.6.0-bin-hadoop2.6 .导航到此路径后，我输入 sbt assembly命令，我收到以下错误消息:

[error] Not a valid command: assembly
[error] Not a valid project ID: assembly
[error] Expected ':'
[error] Not a valid key: assembly
[error] assembly
[error]         ^

这是我的 sbt 项目结构。

-Project101
  -project
     -build.properties
     -plugins.sbt
-src
-build.sbt

这是我的 build.sbt :

name := "Project101"
version := "1.0"
scalaVersion := "2.10.2"
libraryDependencies ++= Seq(
  "org.apache.spark" % "spark-core_2.10" % "1.6.0" exclude ("org.apache.hadoop","hadoop-yarn-server-web-proxy"),
  "org.apache.spark" % "spark-sql_2.10" % "1.6.0" exclude ("org.apache.hadoop","hadoop-yarn-server-web-proxy"),
  "org.apache.spark" %% "spark-hive" % "1.6.0",
  "org.apache.spark" %% "spark-streaming" % "1.6.0",
  "org.apache.spark" %% "spark-streaming-kafka" % "1.6.0"
)
resolvers in Global ++= Seq(
  "Sbt plugins"                   at "https://dl.bintray.com/sbt/sbt-plugin-releases",
  "Maven Central Server"          at "http://repo1.maven.org/maven2",
  "TypeSafe Repository Releases"  at "http://repo.typesafe.com/typesafe/releases/",
  "TypeSafe Repository Snapshots" at "http://repo.typesafe.com/typesafe/snapshots/"
)

这是 plugins.sbt :

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.12.0")

sbt package命令正在运行并且能够创建 jar 文件。但我必须执行 sbt assembly命令也是，但不起作用。

Answer 1

Not a valid command: assembly

每当您遇到错误消息时，请确保您位于项目的顶级目录中，并带有 sbt-assembly插件安装。

如果您在 Project101 有项目目录，请确保 project/plugins.sbt有一行:

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.12.0")

有了这个，你应该再次进入 Project101目录并执行 sbt assembly .那应该执行插件来创建一个 uber-jar。