command-line - sbt 如何在多个可执行文件时传递命令行参数

Question

我的项目有几个可执行文件。我们如何使用提供的命令行参数 运行其中一个 ？在尝试包含来自 sbt run 的 args 后，它们将被忽略，而是列出了可用 main 的菜单:

C:\apps\simpleakka>sbt run "com.mycompany.sparkpoc.hbase.HBasePop spark://localhost:7088 localhost:2181 1000 100"
[info] Loading project definition from C:\apps\simpleakka\project
[info] Set current project to simpleakka (in build file:/C:/apps/simpleakka/)

Multiple main classes detected, select one to run:

 [1] com.mycompany.sparkpoc.LCS
 [2] com.mycompany.sparkpoc.rdd.HBaseMR
 [3] org.apache.spark.examples.HwHBaseTest
 [4] com.mycompany.sparkpoc.rdd.HBaseMROld
 [5] com.mycompany.sparkpoc.HBaseTest
 [6] com.mycompany.sparkpoc.SocketServer
 [7] com.mycompany.sparkpoc.hbase.HBasePop

但是通过选择七个选项之一，命令行参数会丢失:

Enter number:

Invalid number: java.lang.NumberFormatException: For input string: ""
java.lang.RuntimeException: No main class detected.
        at scala.sys.package$.error(package.scala:27)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) No main class detected.
[error] Total time: 3 s, completed Jun 25, 2014 6:12:07 PM

Answer 1

如果你想运行一个特定的主类，你可以使用 runMain ，并且要传递命令行参数，你必须在主类名之后指定它们。

> help runMain
Runs the main class selected by the first argument, passing the remaining arguments to the main method.

例如

> runMain sample.hello.Main firstArg secondArg thirdArg