如何在不破坏Maven发行插件的情况下传递javac多个命令行参数，其中一些包含冒号? [英] How do I pass javac multiple command-line arguments, some of which include colon, without breaking Maven release plugin?

问题描述

当我忘记在Serializable类中声明serialVersionUID时，我想使Maven构建失败.使用javac，这很容易:

I want to make my Maven build fail when I forget to declare serialVersionUIDs in a Serializable class. With javac, that's easy:

$ javac -Xlint:serial -Werror Source.java

直接将其翻译为Maven不起作用:

Directly translating that to Maven doesn't work:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
                <compilerArgument>-Xlint:serial -Werror</compilerArgument>
            </configuration>
        </plugin>

compilerArgument用引号引起来，因此javac仅接收一个包含-Xlint:serial -Werror的参数，而不是将-Xlint:serial和-Werror作为单独的参数.因此，您阅读了文档，然后找到了compilerArguments:

The compilerArgument is quoted, so javac receives only one argument, containing -Xlint:serial -Werror, instead of -Xlint:serial and -Werror as separate arguments. So you read the docs, and find compilerArguments:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
                <compilerArguments>
                    <Xlint:serial />
                    <Werror />
                </compilerArguments>
            </configuration>
        </plugin>

这看起来很奇怪-冒号在Xlint名称空间中创建了serial元素，该元素在任何地方都没有声明-但它可以起作用，直到您要发布:

This looks weird - the colon makes serial element in the Xlint namespace, which isn't declared anywhere - but it works... until you want to do a release:

$ mvn release:prepare

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.3.2:prepare (default-cli) on project my-project: Error reading POM: Error on line 58: The prefix "Xlint" for element "Xlint:serial" is not bound.

显然，常规POM读取器以不同于发布插件所使用的另一种方式处理XML名称空间.

Apparently, the regular POM reader handles XML namespaces in another way than the one used by the release plugin.

那么，当其中一些开关包含对于纯XML元素无效的字符而又不破坏发行插件时，我该如何传递javac多个命令行开关?

So how do I pass javac multiple command-line switches when some of those switches contain characters which aren't valid for plain XML elements, without breaking the release plugin?

推荐答案

似乎在compilerArgument中转义了空格，但引号却并非如此.因此，如果用引号将参数中的空格括起来，则会得到两个参数:

It seems that while spaces are escaped in compilerArgument, the same isn't true for quotes. So, if you surround the spaces in the argument with quotes, you get two arguments:

<compilerArgument>-Xlint:serial" "-Werror</compilerArgument>

这将调用javac "-Xlint:serial" "-Werror"而不是javac "-Xlint:serial -Werror".

在文档中我找不到任何东西.

There's nothing in the docs about this that I can find.

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