[Java] swagger-codegen-maven-plugin v2.4.6 fails to generate invoker pkg ApiClient, regression from v2.4.5

[chrisinmtown]

Description

The version 2.4.6 swagger-codegen-maven-plugin behavior differs from version 2.4.5, it fails to generate the "invoker" package which has (among others) the class ApiClient.

Swagger-codegen version

2.4.6, I believe this behavior is a regression of behavior from 2.4.5.

Swagger declaration file content or url

The generator does not complain about the spec, and I reproduced this behavior on two different API spec files, so I am not including a spec here.

Command line used for generation

mvn clean install

Steps to reproduce

POM file configured as below; all the ${foo} things are just various strings, nothing functional.

                        <plugin>
                                <groupId>io.swagger</groupId>
                                <artifactId>swagger-codegen-maven-plugin</artifactId>
                                <version>2.4.6</version>
                                <executions>
                                        <execution>
                                                <goals>
                                                        <goal>generate</goal>
                                                </goals>
                                                <configuration>
                                                        <inputSpec>${project.basedir}/src/main/resources/my.yaml</inputSpec>
                                                        <language>java</language>
                                                        <configOptions>
                                                                <groupId>${project.groupId}</groupId>
                                                                <artifactId>${project.artifactId}</artifactId>
                                                                <artifactVersion>${project.version}</artifactVersion>
                                                                <artifactUrl>www.me.org</artifactUrl>
                                                                <artifactDescription>client library</artifactDescription>
                                                                <library>resttemplate</library>
                                                                <java8>true</java8>
                                                                <dateLibrary>java8</dateLibrary>
                                                                <licenseName>Apache 2.0</licenseName>
                                                                <licenseUrl>https://www.apache.org/licenses/LICENSE-2.0</licenseUrl>
                                                        </configOptions>
                                                        <packageName>${client.base.package.name}</packageName>
                                                        <modelPackage>${client.base.package.name}.model</modelPackage>
                                                        <apiPackage>${client.base.package.name}.api</apiPackage>
                                                        <invokerPackage>${client.base.package.name}.invoker</invokerPackage>
                                                </configuration>
                                        </execution>
                                </executions>
                        </plugin>

Related issues/PRs

I cannot find anyone complaining about 2.4.6 (yet).

Suggest a fix/enhancement

I don't have a fix.

[chrisinmtown]

Duplicate of #9540. Sorry for the clutter.