Alan Zimmer created MCOMPILER-578:
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Summary: Inconsistent behavior when clean is included in build
Key: MCOMPILER-578
URL: https://issues.apache.org/jira/browse/MCOMPILER-578
Project: Maven Compiler Plugin
Issue Type: Bug
Affects Versions: 3.12.1
Reporter: Alan Zimmer
We use a set of compilation executions to make sure we compile our code to a
baseline of Java 8 and for module-info.java specifically a baseline of Java 11,
while also compiling to whatever version being used by the system (Java 17, 21,
22-ea, etc).
After upgrading to 3.12.1 from 3.10.1 we found that when `clean` is included as
part of the build we get a different behavior for the Java 11 compilation. When
`clean` is included there is a compilation for that execution which recompiles
the module-info down to a class level of 55.0, when clean isn't included the
class level remains whatever level the JDK being used to compile is.
<executions>
<!-- compile first with VM's default Java version -->
<!-- this will generate module-info with major class version based on the Java
version being used, in CI this should be 61 (i.e Java 17) -->
<execution>
<id>default-compile</id>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<release>${java.vm.specification.version}</release>
</configuration>
</execution>
<!-- then compile with Java 11 as the base version that supports module-info -->
<!-- this is the Azure SDK baseline for jars that are released to Maven and
should only be updated
when the Azure SDK policy is changed -->
<!-- executing this after default-compile will generate module-info with major
class version 55 (i.e Java 11) -->
<execution>
<id>base-modules-compile</id>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<release>11</release>
<includes>
<include>module-info.java</include>
</includes>
</configuration>
</execution>
<!-- then compile without module-info for Java 8 -->
<execution>
<id>base-compile</id>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<compilerArgs combine.children="append">
<arg>-Xlint:-options</arg> <!-- Needed to compile with Java 20+ -->
</compilerArgs>
<release>8</release>
<excludes>
<exclude>module-info.java</exclude>
</excludes>
</configuration>
</execution>
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