Groovy graphqlIntrospectSchema failing on kotlin.jvm.internal.MutablePropertyReference

[FidasL]

Library Version
4.1.1

Hello. Our gradle plugin is failing on task graphqlIntrospectSchema. Getting this error:

Execution failed for task ':graphqlIntrospectSchema'.
> There was a failure while executing work items
   > A failure occurred while executing com.expediagroup.graphql.plugin.gradle.actions.IntrospectSchemaAction
      > kotlin.jvm.internal.MutablePropertyReference1Impl.<init>(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/String;I)V

build.gradle configuration:

plugins {
    id("com.expediagroup.graphql") version "4.1.1"
}

graphql {
    // generates schema.graphql to buildDir/schema.graphql
    graphqlIntrospectSchema {
        endpoint = "http://localhost:8080/graphql"
    }

    graphqlGenerateClient {
        schemaFileName = "$projectDir/resources/schema.graphql"
        packageName = "com.example.client.graphql.generated"
        queryFileDirectory = "$projectDir/resources/graphql/"
        allowDeprecatedFields = false
    }
}

Do we need to provide some extra parameters when introspecting schema, or this is your issue?

[dariuszkuc]

Hello 👋
I just tried the above configuration and with few minimal tweaks it worked for me. I could not reproduce your error.

plugins {
    id("org.jetbrains.kotlin.jvm") version '1.4.32'
    id("com.expediagroup.graphql") version "4.1.1"
}

group 'org.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib"
    implementation "com.expediagroup:graphql-kotlin-spring-client:4.1.1" // spring or ktor client is required for compilation
}

graphql {
    graphqlIntrospectSchema {
        endpoint = "http://localhost:8080/graphql"
    }

    graphqlGenerateClient {
        schemaFile = graphqlIntrospectSchema.outputFile // changed to use the output from other task
        packageName = "com.example.client.graphql.generated"
        queryFileDirectory = "$projectDir/resources/graphql/"
        allowDeprecatedFields = false
        dependsOn("graphqlIntrospectSchema") // added explicit dependency on task so they run in order
    }
}

That being said - graphql extension provides a shorthand for configuring those two tasks so you could simplify your config (see: https://opensource.expediagroup.com/graphql-kotlin/docs/plugins/gradle-plugin-usage#minimal-client-configuration-example). Refer to our documentation for additional details.

[FidasL]

Hello. Thank you for your reply!

I got same error with your simple example. Do you think, it could be caused by Gradle version? I am using Gradle 6.7

[dariuszkuc]

Above should work with Groovy scripts (build.gradle) it won't work if you use Kotlin scripts (build.gradle.kts). See the docs for configuration examples.

You could also move task definitions outside of graphql extension as that might be causing your issue (or simply configure extension instead of tasks -> again see the docs).