Requesting new configOption for JavaJAXRSS to generate or not both RestApplication.java and RestResourceRoot.java

[WhiskasChaton]

Is your feature request related to a problem? Please describe.

I'm working on a project where i need to generate several swagger specs through different config :

<executions>
  <execution>
      <id>ex1</id>
      <goals>
          <goal>generate</goal>
      </goals>
      <configuration>
          <inputSpec>
              ${project.basedir}/spec1.yaml
          </inputSpec>
          <modelPackage>path1.api</modelPackage>
          <apiPackage>path1.model</apiPackage>
      </configuration>
  </execution>
<execution>
      <id>ex2</id>
      <goals>
          <goal>generate</goal>
      </goals>
      <configuration>
          <inputSpec>
              ${project.basedir}/spec2.yaml
          </inputSpec>
          <modelPackage>path2.api</modelPackage>
          <apiPackage>path2.model</apiPackage>
      </configuration>
  </execution>

Problem is that both execution generates RestApplication.java and RestResourceRoot.java (which are not useful to my project...) , and having multiple of those give me the following error at build :

java.lang.RuntimeException:
java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
[error]: Build step io.quarkus.resteasy.reactive.common.deployment.ResteasyReactiveCommonProcessor#handleApplication threw an exception: java.lang.RuntimeException: More than one Application class: [path1.RestApplication, path2.RestApplication]

Problem exists since #17645

Describe the solution you'd like

Please introduce an new configOption (true by default to remain backward compatible) to enable generation of those files or not here :

https://github.com/OpenAPITools/openapi-generator/blame/master/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaJAXRSSpecServerCodegen.java#L178
https://github.com/OpenAPITools/openapi-generator/blame/master/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaJAXRSSpecServerCodegen.java#L187

Describe alternatives you've considered

Currently, as work-around, i have to delete the generated files after it has been generated
Example for people having the same issue :

<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-antrun-plugin</artifactId>
	<version>1.7</version>
	<executions>
		<execution>
			<phase>generate-sources</phase>
			<goals>
				<goal>run</goal>
			</goals>
			<configuration>
				<tasks>
					<delete>
						<fileset dir="${project.build.directory}\path1\" includes="RestApplication.java"/>
						<fileset dir="${project.build.directory}\path1\" includes="RestResourceRoot.java"/>
						<fileset dir="${project.build.directory}\path2\" includes="RestApplication.java"/>
						<fileset dir="${project.build.directory}\path2\" includes="RestResourceRoot.java"/>
					</delete>
				</tasks>
			</configuration>
		</execution>
	</executions>
</plugin>

[wing328]

to skip certain files from being generated, what about using .openapi-generator-ignore?

https://github.com/openapitools/openapi-generator/blob/master/docs/customization.md#ignore-file-format

(there's an option to pre-populate this file)

[WhiskasChaton]

to skip certain files from being generated, what about using .openapi-generator-ignore?

https://github.com/openapitools/openapi-generator/blob/master/docs/customization.md#ignore-file-format

(there's an option to pre-populate this file)

I wasn't aware of this feature and it suits perfectly what I needed

Note that I also needed to add the <ignoreFileOverride>.openapi-generator-ignore</ignoreFileOverride> in the maven plugin configuration to make it works on top of the .openapi-generator-ignore file with the following
**/RestApplication.java
**/RestResourceRoot.java

Thanks for the tips !