This POM simplifies the creation of multi-release jars.
Setup
Make this your parent POM:
<parent>
<groupId>com.meterware</groupId>
<artifactId>multirelease-parent</artifactId>
<version>1.0</version>
</parent>
You must have a toolchains.xml
defined in your maven configuration directory (~/.m2/toolchains.xml
on OS X and Linux)
Code for the main jar (JDK 1.7-1.8) goes under src/main/java
as usual.
Code additions for later JDKs, along with module-info.jar
go under src/main/java9
, src/main/java10
or src/main/java11
Unit Testing
mvn clean test
will use the current JDK (the one running Maven)to run unit tests, including the appropriate additional directories.
Building the MR JAR
mvn -Dmulti_release clean install
will create the multi-release JAR, using toolchains to select the appropriate compiler for each jar. This will automatically happen when using the release plugin.
Notes:
This parent POM inherits from org.sonatype.oss:oss-parent:9
and brings with it all associated definitions.
By default, builds with this parent will use JDK 1.7 to build the main jar. You can change that by adding
<base.java.version>1.8</base.java.version>
to your <properties>
section.