[gradle-plugin] Pass openapiGeneratorIgnoreList option from the openApiGenerate extension to the corresponding task (#21363)

modules/openapi-generator-gradle-plugin/src/main/kotlin/org/openapitools/generator/gradle/plugin/OpenApiGeneratorPlugin.kt

@@ -117,6 +117,7 @@ class OpenApiGeneratorPlugin : Plugin<Project> {
                     additionalProperties.set(generate.additionalProperties)
                     serverVariables.set(generate.serverVariables)
                     languageSpecificPrimitives.set(generate.languageSpecificPrimitives)
+                    openapiGeneratorIgnoreList.set(generate.openapiGeneratorIgnoreList)
                     importMappings.set(generate.importMappings)
                     schemaMappings.set(generate.schemaMappings)
                     inlineSchemaNameMappings.set(generate.inlineSchemaNameMappings)

modules/openapi-generator-gradle-plugin/src/test/kotlin/GenerateTaskDslTest.kt

@@ -570,4 +570,55 @@ class GenerateTaskDslTest : TestBase() {
             "Dry run results message is missing."
         )
     }
+
+    @Test
+    fun `openapiGenerate should set openapiGeneratorIgnoreList option`() {
+        // Arrange
+        val projectFiles = mapOf(
+            "spec.yaml" to javaClass.classLoader.getResourceAsStream("specs/petstore-v3.0.yaml")
+        )
+        withProject(
+            """
+        plugins {
+          id 'org.openapi.generator'
+        }
+        openApiGenerate {
+            generatorName = "kotlin"
+            inputSpec = file("spec.yaml").absolutePath
+            outputDir = file("build/kotlin").absolutePath
+            apiPackage = "org.openapitools.example.api"
+            invokerPackage = "org.openapitools.example.invoker"
+            modelPackage = "org.openapitools.example.model"
+            configOptions = [
+                    dateLibrary: "java8"
+            ]
+            openapiGeneratorIgnoreList = ["README.md"]
+        }
+    """.trimIndent(),
+            projectFiles
+        )
+
+        // Act
+        val result = GradleRunner.create()
+            .withProjectDir(temp)
+            .withArguments("openApiGenerate")
+            .withPluginClasspath()
+            .build()
+
+        // Assert
+        assertTrue(
+            result.output.contains("Successfully generated code to"),
+            "User friendly generate notice is missing."
+        )
+
+        assertTrue(
+            "README.md" !in File(temp, "build/kotlin/").list(),
+            "README.md should not be generated when it is in the openapiGeneratorIgnoreList."
+        )
+
+        assertEquals(
+            TaskOutcome.SUCCESS, result.task(":openApiGenerate")?.outcome,
+            "Expected a successful run, but found ${result.task(":openApiGenerate")?.outcome}"
+        )
+    }
 }