字符串数组作为maven插件的命令行参数 [英] String arrays as command line arguments for maven plugin

问题描述

我写了一个maven插件，它的参数是一个String []。

I'm writing a maven plugin that has a parameter that's a String[].

像这样：

/**
* @parameter expression="${args}"
*/
protected String[] args;

这可以通过POM使用，如下所示：

This can be utilized through the POM like this:

<args>
  <arg>arg1</arg>
  <arg>arg2</arg>
<args>

但我想从命令行发送

-Dargs={arg1, arg2}

这是可能吗？

推荐答案

尽管我知道你不能直接做，但是这是很常见的做法，接受一个分隔的字符串并自己将它拆分成一个数组。

You can't do it directly as far as I know, but it is pretty common practice to accept a delimited String and split that into an array yourself.

例如 maven-site-plugin 允许您指定以逗号分隔的语言环境的字符串，而 maven-scala-plugin 通过允许您使用管道分隔符定义参数来处理此问题。

For example the maven-site-plugin allows you to specify a comma-delimited String of locales, while the maven-scala-plugin handles this by allowing you to define the arguments with a pipe separator. You can look at the relevant Mojos to see how the argument is processed.

下面是一些例子：

site-plugin：

site-plugin:

-Dlocales=enGB,frFR

scala-plugin：

scala-plugin:

-DaddArgs=arg1|arg2|arg3

更新：如果你想更优雅地处理这个，你可以使用maven-shared-io来定义的外部描述符文件，然后将描述符位置作为属性传递。这意味着单个命令行参数可以引用配置的结构。

Update: if you want to handle this more elegantly, you could use maven-shared-io to allow definition of an external descriptor file, then pass the descriptor location as a property. This means a single command-line argument can reference a structure of configuration.

如果这听起来像可能适用于你，请看看这个answer ，介绍如何在属性中使用外部描述符插件，或者此 answer 类似为xml-maven插件。或者你可以看看装配插件的想法。

If this sounds like it might work for you, have a look at this answer that describes how to use external descriptors in the properties plugin, or this answer that does similar for the xml-maven-plugin. Or you can just look at the assembly-plugin for ideas.

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