`directories not supported` exception when updating spring-modulith-bom to version 1.4.0 or 1.4.1

[AndreaScarselliAx]

Hi,

After upgrading spring-modulith-bom to version 1.4.0 or version 1.4.1, we are getting the following exception on CI.

Caused by: java.lang.IllegalArgumentException: directories not supported
    at com.sun.tools.javac.file.PathFileObject.<init> (PathFileObject.java:340)
    at com.sun.tools.javac.file.PathFileObject$DirectoryFileObject.<init> (PathFileObject.java:111)
    at com.sun.tools.javac.file.PathFileObject.forDirectoryPath (PathFileObject.java:102)
    at com.sun.tools.javac.file.JavacFileManager.getFileForOutput (JavacFileManager.java:938)
    at com.sun.tools.javac.file.JavacFileManager.getFileForOutput (JavacFileManager.java:900)
    at javax.tools.JavaFileManager.getFileForOutputForOriginatingFiles (JavaFileManager.java:535)
    at com.sun.tools.javac.main.DelegatingJavaFileManager.getFileForOutputForOriginatingFiles (DelegatingJavaFileManager.java:139)
    at com.sun.tools.javac.processing.JavacFiler.createResource (JavacFiler.java:551)
    at org.springframework.modulith.apt.SpringModulithProcessor.init (SpringModulithProcessor.java:133)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$ProcessorState.<init> (JavacProcessingEnvironment.java:699)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$DiscoveredProcessors$ProcessorStateIterator.next (JavacProcessingEnvironment.java:826)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs (JavacProcessingEnvironment.java:922)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run (JavacProcessingEnvironment.java:1265)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing (JavacProcessingEnvironment.java:1380)
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations (JavaCompiler.java:1272)
    at com.sun.tools.javac.main.JavaCompiler.compile (JavaCompiler.java:946)
    at com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0 (JavacTaskImpl.java:104)
    at com.sun.tools.javac.api.JavacTaskImpl.invocationHelper (JavacTaskImpl.java:152)
    at com.sun.tools.javac.api.JavacTaskImpl.doCall (JavacTaskImpl.java:100)
    at com.sun.tools.javac.api.JavacTaskImpl.call (JavacTaskImpl.java:94)
    at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:126)
    at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile (JavacCompiler.java:214)
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1226)
    at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:225)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:126)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:174)
    at org.apache.maven.lifecycle.internal.MojoExecutor.access$000 (MojoExecutor.java:75)
    at org.apache.maven.lifecycle.internal.MojoExecutor$1.run (MojoExecutor.java:162)
    at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute (DefaultMojosExecutionStrategy.java:39)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:73)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:53)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:118)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:103)
    at java.lang.reflect.Method.invoke (Method.java:580)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:255)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:201)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:361)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:314)

There is no issue when we build our project locally, using the same maven and Java version used on CI. The difference is the OS (macOS vs. Linux).

On the CI we are using the following:

Maven version: Apache Maven 3.9.10 (5f519b97e944483d878815739f519b2eade0a91d)
Maven home: /usr/share/maven
Java version: 21.0.7, vendor: Eclipse Adoptium, runtime: /opt/java/openjdk
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-1088-azure", arch: "amd64", family: "unix"

We have been able to fix it by adding the following configuration on our pom:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>${maven-compiler-plugin.version}</version>
    <configuration>
        <source>${java.version}</source>
        <target>${java.version}</target>
        <annotationProcessorPaths>
            <path>
                <groupId>org.springframework.modulith</groupId>
                <artifactId>spring-modulith-api</artifactId>
                <version>${spring-modulith-bom.version}</version>
            </path>
        </annotationProcessorPaths>
        <generatedSourcesDirectory>${project.build.directory}/generated-sources/annotations</generatedSourcesDirectory>
        <compilerArgs>
            <arg>-s</arg>
            <arg>${project.build.directory}/generated-sources/annotations</arg>
        </compilerArgs>
    </configuration>
</plugin>

Do you have any idea what's going on?

Thank you,
Andrea