从Gradle运行后台作业 [英] Run a background job from Gradle

问题描述

我创建了一个启动远程作业的任务，如

 任务mytask（类型：Exec）{
 commandLine'ssh'
 args'-f -l me myserver ./start'.split（''）
} 
  

并且它可以工作，但是，它似乎等待工作终止。但它永远不会终止，它不应该。

从命令行执行相同的操作：由于 -f 切换 ssh 命令在后台执行。

我试着添加'>&'/ dev / null （csh stdout和stderr重定向）到命令行，但没有任何成功。另外，明显的& 什么都没做。我也提取了命令行到一个脚本，它总是一样的：Gradle等待终止。

解决方案

我已经通过使用脚本解决了这个问题，并在脚本中重定向了stdout和stderr。我的问题来自混淆重定向...通过传递'>&'/ dev / null 我重定向了远程计算机上的流，但是需要重定向（即，不要将重定向操作符放在引号中）。

解决方案 Exec 任务总是等待终止。要运行后台作业，您需要编写自己的任务，例如，可以使用Java ProcessBuilder API。

I've created a task starting a remote job like

task mytask(type: Exec) {
    commandLine 'ssh'
    args '-f -l me myserver ./start'.split(' ')
}

and it works, however, it seems to wait for the job to terminate. But it never terminates and it shouldn't.

Doing the same from the command line works: Because of the -f switch the ssh command gets executed in the background.

I've tried to add '>&' /dev/null (csh stdout and stderr redirect) to the command line, but without any success. Also the obvious & did nothing. I also extracted the command line into a script, and it's always the same: Gradle waits for termination.

Solution

I've solved it by using a script and redirecting both stdout and stderr in the script. My problem came from confusing redirections... by passing '>&' /dev/null I redirected the streams on the remote computer, but what was needed was a redirection on the local one (i.e., without putting the redirection operator in quotes).

解决方案

The Exec task always waits for termination. To run a background job, you need to write your own task, which could, for example, use the Java ProcessBuilder API.

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