How to set the Maven artifactId at runtime? - maven

Question

I would like to define the artifactId in a POM at runtime. I am aware from answers to this question that this is bad practise and Maven archetypes should be used instead, but I would really like to know if it is possible at all.
Currently I have a POM with an artifactId like this:
<artifactId>myproject${var}</artifactId>
and I can successfully build the project by setting the variable on the command line:
mvn install -Dvar=justatest
Now is it possible to change this input variable at runtime? For example convert it to uppercase (e.g. with the gmaven-plugin) or similar?

Answer 1

You cannot change the artifactId at build-time. It is part of the Maven coordinates (groupId:artifactId:version) so it must be fixed.
All other parameters you could change during the build with the maven-antrun-plugin.
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<id>touppercase</id>
<goals>
<goal>run</goal>
</goals>
<configuration>
<target>
<property name="varUpper" value="${var}"/>
<script language="javascript"> <![CDATA[
property = project.getProperty("varUpper");
project.setProperty("varUpper", property.toUpperCase());
]]> </script>
</target>
<exportAntProperties>true</exportAntProperties>
</configuration>
</execution>
</executions>
</plugin>
After this execution, Maven will have a new property called ${varUpper} that is uppercased ${var}. You need to set the correct phase to the snippet above to match your build process.