remove mill plugin (#22736)

Author: wing328

.github/workflows/mill-plugin-tests.yaml

@@ -13,7 +13,6 @@ COPY ./google_checkstyle.xml ${GEN_DIR}
 # All poms are copied, then we go offline, to allow for better caching of code changes without fetching all dependencies each time
 COPY ./modules/openapi-generator-gradle-plugin/pom.xml ${GEN_DIR}/modules/openapi-generator-gradle-plugin/
 COPY ./modules/openapi-generator-maven-plugin/pom.xml ${GEN_DIR}/modules/openapi-generator-maven-plugin/
-COPY ./modules/openapi-generator-mill-plugin/pom.xml ${GEN_DIR}/modules/openapi-generator-mill-plugin/
 COPY ./modules/openapi-generator-online/pom.xml ${GEN_DIR}/modules/openapi-generator-online/
 COPY ./modules/openapi-generator-cli/pom.xml ${GEN_DIR}/modules/openapi-generator-cli/
 COPY ./modules/openapi-generator-core/pom.xml ${GEN_DIR}/modules/openapi-generator-core/
@@ -24,7 +23,6 @@ RUN mvn dependency:go-offline
 # Modules are copied individually here to allow for caching of docker layers between major.minor versions
 COPY ./modules/openapi-generator-gradle-plugin ${GEN_DIR}/modules/openapi-generator-gradle-plugin
 COPY ./modules/openapi-generator-maven-plugin ${GEN_DIR}/modules/openapi-generator-maven-plugin
-COPY ./modules/openapi-generator-mill-plugin ${GEN_DIR}/modules/openapi-generator-mill-plugin
 COPY ./modules/openapi-generator-online ${GEN_DIR}/modules/openapi-generator-online
 COPY ./modules/openapi-generator-cli ${GEN_DIR}/modules/openapi-generator-cli
 COPY ./modules/openapi-generator-core ${GEN_DIR}/modules/openapi-generator-core

Dockerfile

@@ -93,7 +93,6 @@ declare -a xml_files=(
 declare -a properties_files=(
     "${root}/modules/openapi-generator-gradle-plugin/gradle.properties"
     "${root}/modules/openapi-generator-gradle-plugin/samples/local-spec/gradle.properties"
-    "${root}/modules/openapi-generator-mill-plugin/example/mill-build/version.properties"
 )
 
 ${cwd}/bump.sh -f ${version} -i ${inc} ${xml_files[@]}

bin/utils/release/release_version_update.sh

@@ -120,56 +120,3 @@ openApiGenerate {
 ```
 
 *If you want to create separate tasks (for example when you have more than one api spec and require different parameters for each), this is how to do so in Gradle 7+: `tasks.register('taskName', org.openapitools.generator.gradle.plugin.tasks.GenerateTask) { ... }`.*
-
-## Mill
-
-This Mill library provides a Mill module that can be used to generate code from OpenAPI specifications.
-
-### Example
-
-```scala
-//| mill-version: 1.0.6
-//| mvnDeps:
-//|   - org.openapitools:openapi-generator-mill-plugin:7.19.0 # 1.
-
-import mill.*
-
-import org.openapitools.generator.mill.OpenApiModule // 2.
-
-object `package` extends JavaModule with MavenModule with OpenApiModule { // 3.
-
-  // other Mill config...
-  
-  object openapi extends OpenApiConfig { // 4.
-    def inputSpec: T[PathRef] = Task.Source(BuildCtx.workspaceRoot / "api" / "petstore.yaml")
-    // other config options...
-  }
-
-  override def generatedSources: T[Seq[PathRef]] = Seq(
-    PathRef(Task.dest),
-    openapi.generate(), // 5.
-  )
-}
-```
-
-1. Add the plugin to your `build.mill` as `mvnDeps` in the header section
-2. import `org.openapitools.generator.mill.OpenApiModule`
-3. add `OpenApiModule` to the module definition
-4. configure 1-n `OpenApiConfig` as sub-modules
-5. run the generation as part of the `compile` task
-
-This gives access to the following tasks:
-
-| Task                      | Description                                                                                 |
-|---------------------------|---------------------------------------------------------------------------------------------|
-| <configName>.generate     | Generate code via Open API Tools Generator for Open API 2.0 or 3.x specification documents. |
-| <configName>.validateSpec | Validates the configured spec                                                               |
-
-and a command
-
-| Command             | Description                                    |
-|---------------------|------------------------------------------------|
-| validateOpenapiSpec | Takes the path to a spec file and validates it |
-
-
-For full details of all options, see the [plugin README](https://github.com/OpenAPITools/openapi-generator/tree/master/modules/openapi-generator-mill-plugin).