Blake McBride (2025-09-18 22:42):
According to ChatGPT:
If you have *multiple source roots*, Maven itself only supports a
*single* |<sourceDirectory>| and |<testSourceDirectory>| in the
|<build>| section. To handle *more than one*, you need to *declare one
as the “main”* and then use the |build-helper-maven-plugin| to add the
rest.
This is one of many reasons I resorted to my own build system.
(BTW, IntelliJ supports any number of source roots.)
--blake
BTW. Assuming those multiple roots are not just random projects, but are
actually connected with each other then you will probably want to keep
some dependencies in sync. So even though I can run my utils and my
extapp project separately (one builds as jar and the other as war), I
can still keep the same Java in them and some version properties:
<properties>
<java.version>17</java.version>
<maven.compiler.release>${java.version}</maven.compiler.release>
<version.CopyrightYears>2013-2025</version.CopyrightYears>
<!--
https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin
-->
<maven.compiler.plugin.version>3.14.0</maven.compiler.plugin.version>
<!--
https://mvnrepository.com/artifact/org.springframework/spring-core -->
<spring.version>6.1.21</spring.version>
</properties>
And then I can use those properties in other poms.
Regards,
Maciej Nux
