[jira] [Created] (MCOMPILER-511) proc:only doesn't work as expected

[Jira]

Stefan Röck created MCOMPILER-511:
-------------------------------------

             Summary: proc:only doesn't work as expected
                 Key: MCOMPILER-511
                 URL: https://issues.apache.org/jira/browse/MCOMPILER-511
             Project: Maven Compiler Plugin
          Issue Type: Bug
    Affects Versions: 3.10.1
         Environment: Windows, Tested with JDK 1.8, 11, 17
            Reporter: Stefan Röck


According to the docs 
[https://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html#proc,]
 *proc:only* should only process annotation processors but *not* trigger 
compilation. However, files are always compiled with the following config:

{code}
<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.10.1</version>
                <executions>
                    <execution>
                        <id>process</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <annotationProcessors>
                                
<processor>org.immutables.processor.ProxyProcessor</processor>
                            </annotationProcessors>
                            <proc>only</proc>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
{code}


See small reproducer repo at https://github.com/stefanroeck/annotationtest



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