How do I pass javac multiple command-line arguments, some of which include colon, without breaking Maven release plugin?

Question

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

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>

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>

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.

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

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?

Answer 1

See http://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html#compilerArgs

and http://maven.apache.org/plugins/maven-compiler-plugin/examples/pass-compiler-arguments.html

Maven 3.1 or later

                        <source>1.6</source>
                        <target>1.6</target>
                        <showDeprecation>true</showDeprecation>
                        <showWarnings>true</showWarnings>
                        </processors>
                        <compilerArgs>
                          <arg>-verbose</arg>
                          <arg>-Aeclipselink.persistencexml=src/main/resources/META-INF/persistence.xml</arg>
                        </compilerArgs>

or Maven 3.0 or older

      <compilerArguments>
        <verbose />
      </compilerArguments>
      <compilerArgument>-Aeclipselink.persistencexml=src/main/resources/META-INF/persistence.xml</compilerArgument>