build: stop publishing swagger-generator to Maven Central (#12783)

The swagger-generator WAR (~27 MB per release, plus pom, sources and
javadoc) is only consumed by the swagger-generator Docker images, which
are built from modules/swagger-generator/target/. It is not usable as a
library dependency and has no known consumers on Central.

The module is still built, so Docker image builds are unaffected.

Author: djankows

docs/online-generators.md

@@ -4,6 +4,8 @@
 
 The web service is deployed at https://generator3.swagger.io/ui, or it can be easily deployed as docker container.
 
+> Starting with 3.0.86, the `swagger-generator` WAR is no longer published to Maven Central. Use the `swaggerapi/swagger-generator-v3` docker image, or build the WAR from source with `mvn package` (output in `modules/swagger-generator/target/`).
+
 The OpenAPI specification of generator service APIs are available either via UI exposed by web service (e.g. https://generator3.swagger.io/ui), as exposed YAML (https://generator3.swagger.io/openapi.json)
 or in source code repo (https://github.com/swagger-api/swagger-codegen/blob/3.0.0/modules/swagger-generator/src/main/resources/openapi.yaml).
 

pom.xml

@@ -198,6 +198,10 @@
                     <autoPublish>true</autoPublish>
                     <waitUntil>published</waitUntil>
                     <waitMaxTime>3600</waitMaxTime>
+                    <excludeArtifacts>
+                        <!-- The WAR is only consumed by the swagger-generator Docker images, which are built from target/ -->
+                        <excludeArtifact>swagger-generator</excludeArtifact>
+                    </excludeArtifacts>
                 </configuration>
             </plugin>
         </plugins>