Check minimum Kotlin version in the plugin

README.md

@@ -106,7 +106,7 @@ Here's the current matrix of supported features per platform:
 
 ## Requirements
 
-Apollo Android runs on the following platforms:
+Some platforms have specific requirements:
 
 * Android API level 15+
 * JDK 8+

apollo-gradle-plugin/build.gradle.kts

@@ -37,7 +37,7 @@ fun addShadowImplementation(dependency: Dependency) {
 dependencies {
   compileOnly(groovy.util.Eval.x(project, "x.dep.minGradleApi"))
   //compileOnly(groovy.util.Eval.x(project, "x.dep.gradleApi"))
-  compileOnly(groovy.util.Eval.x(project, "x.dep.kotlin.plugin"))
+  compileOnly(groovy.util.Eval.x(project, "x.dep.kotlinPluginMin"))
   compileOnly(groovy.util.Eval.x(project, "x.dep.android.minPlugin"))
 
   addShadowImplementation(projects.apolloCompiler)

apollo-gradle-plugin/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateSourcesTask.kt

@@ -295,7 +295,7 @@ abstract class ApolloGenerateSourcesTask : DefaultTask() {
       "1.5" -> TargetLanguage.KOTLIN_1_5
       null -> {
         // User didn't specify a version: defaults to the Kotlin plugin's version
-        val majorMinor = project.getKotlinPluginVersion().take(3)
+        val majorMinor = project.getKotlinPluginVersion()!!.take(3)
         if (majorMinor == "1.4") {
           TargetLanguage.KOTLIN_1_4
         } else {

apollo-gradle-plugin/src/main/kotlin/com/apollographql/apollo3/gradle/internal/DefaultApolloExtension.kt

@@ -26,7 +26,9 @@ import org.gradle.api.provider.Property
 import org.gradle.api.tasks.TaskProvider
 import org.gradle.util.GradleVersion
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinBasePluginWrapper
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import org.jetbrains.kotlin.gradle.plugin.getKotlinPluginVersion
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeCompilation
 import java.io.File
 
@@ -47,6 +49,24 @@ abstract class DefaultApolloExtension(
       "apollo-android requires Gradle version $MIN_GRADLE_VERSION or greater"
     }
 
+    project.plugins.all {
+      if (it is KotlinBasePluginWrapper) {
+        val version = project.getKotlinPluginVersion()!!
+            .split(".")
+            .take(2)
+            .map { it.toInt() }
+
+        val isKotlinSupported = when {
+          version[0] > 1 -> true
+          version[0] == 1 -> version[1] >= 4
+          else -> false
+        }
+        require(isKotlinSupported) {
+          "Apollo Android requires Kotlin plugin version 1.4 or more (found '${project.getKotlinPluginVersion()}')"
+        }
+      }
+    }
+    KotlinVersion.CURRENT
     apolloConfiguration = project.configurations.create(ModelNames.apolloConfiguration()) {
       it.isCanBeConsumed = false
       it.isCanBeResolved = false

apollo-gradle-plugin/src/test/files/gradle/settings.gradle.kts

@@ -14,7 +14,7 @@ pluginManagement {
   resolutionStrategy {
     eachPlugin {
       if (requested.id.id == "org.jetbrains.kotlin.jvm") {
-        useModule(groovy.util.Eval.x(extra, "x.dep.kotlin.plugin"))
+        useModule(groovy.util.Eval.x(extra, "x.dep.kotlinPlugin"))
       }
 
       if (requested.id.id == "com.apollographql.apollo3") {

apollo-gradle-plugin/src/test/kotlin/com/apollographql/apollo3/gradle/test/KotlinPluginVersionTests.kt

@@ -0,0 +1,40 @@
+package com.apollographql.apollo3.gradle.test
+
+import com.apollographql.apollo3.gradle.util.TestUtils
+import com.google.common.truth.Truth
+import junit.framework.Assert.fail
+import org.gradle.testkit.runner.TaskOutcome
+import org.gradle.testkit.runner.UnexpectedBuildFailure
+import org.junit.Test
+import java.io.File
+
+class KotlinPluginVersionTests {
+  private fun File.setKotlinPluginVersion(version: String) {
+    val gradleScript = resolve("build.gradle.kts")
+    gradleScript.writeText(gradleScript.readText().replace("KOTLIN_VERSION", version))
+  }
+
+  @Test
+  fun kotlin13Fails() {
+    TestUtils.withTestProject("kotlin-plugin-version") { dir ->
+      dir.setKotlinPluginVersion("1.3.0")
+      // Kotlin 1.3 uses DefaultSourceDirectorySet() which is removed in recent Gradle versions
+      try {
+        TestUtils.executeGradleWithVersion(dir, "5.6", "help")
+        fail("An exception was expected")
+      } catch (e: UnexpectedBuildFailure) {
+        Truth.assertThat(e.message).contains("Apollo Android requires Kotlin plugin version 1.4")
+      }
+    }
+  }
+
+  @Test
+  fun kotlin14Succeeds() {
+    TestUtils.withTestProject("kotlin-plugin-version") { dir ->
+      dir.setKotlinPluginVersion("1.4.32")
+      val result = TestUtils.executeTask("help", dir)
+
+      Truth.assertThat(result.task(":help")!!.outcome).isEqualTo(TaskOutcome.SUCCESS)
+    }
+  }
+}

apollo-gradle-plugin/src/test/kotlin/com/apollographql/apollo3/gradle/util/TestUtils.kt

@@ -13,14 +13,11 @@ import java.io.File
 object TestUtils {
   class Plugin(val artifact: String?, val id: String)
 
-  val javaPlugin = Plugin(id = "java", artifact = null)
   val androidApplicationPlugin = Plugin(id = "com.android.application", artifact = "android.plugin")
   val androidLibraryPlugin = Plugin(id = "com.android.library", artifact = "android.plugin")
-  val kotlinJvmPlugin = Plugin(id = "org.jetbrains.kotlin.jvm", artifact = "kotlin.plugin")
-  val kotlinAndroidPlugin = Plugin(id = "org.jetbrains.kotlin.android", artifact = "kotlin.plugin")
+  val kotlinJvmPlugin = Plugin(id = "org.jetbrains.kotlin.jvm", artifact = "kotlinPlugin")
+  val kotlinAndroidPlugin = Plugin(id = "org.jetbrains.kotlin.android", artifact = "kotlinPlugin")
   val apolloPlugin = Plugin(id = "com.apollographql.apollo3", artifact = "apollo.plugin")
-  val apolloPluginAndroid = Plugin(id = "com.apollographql.android", artifact = "apollo.plugin")
-
 
   fun withDirectory(block: (File) -> Unit) {
     val dest = File(File(System.getProperty("user.dir")), "build/testProject")

apollo-gradle-plugin/testProjects/buildCache/build.gradle.kts

@@ -13,6 +13,6 @@ buildscript {
     }
     dependencies {
         classpath(groovy.util.Eval.x(project, "x.dep.apollo.plugin"))
-        classpath(groovy.util.Eval.x(project, "x.dep.kotlin.plugin"))
+        classpath(groovy.util.Eval.x(project, "x.dep.kotlinPlugin"))
     }
 }

apollo-gradle-plugin/testProjects/buildscript.gradle.kts

@@ -9,7 +9,7 @@ project.buildscript.repositories {
 }
 
 project.buildscript.dependencies.apply {
-  add("classpath", groovy.util.Eval.x(project, "x.dep.kotlin.plugin"))
+  add("classpath", groovy.util.Eval.x(project, "x.dep.kotlinPlugin"))
   add("classpath", groovy.util.Eval.x(project, "x.dep.apollo.plugin"))
   add("classpath", groovy.util.Eval.x(project, "x.dep.android.plugin"))
 }

apollo-gradle-plugin/testProjects/groovy/settings.gradle.kts

@@ -10,7 +10,7 @@ pluginManagement {
     eachPlugin {
       when (requested.id.id) {
         "com.apollographql.apollo3" -> useModule(groovy.util.Eval.x(settings, "x.dep.apollo.plugin"))
-        "org.jetbrains.kotlin.jvm" -> useModule(groovy.util.Eval.x(settings, "x.dep.kotlin.plugin"))
+        "org.jetbrains.kotlin.jvm" -> useModule(groovy.util.Eval.x(settings, "x.dep.kotlinPlugin"))
       }
     }
   }

apollo-gradle-plugin/testProjects/kotlin-plugin-version/build.gradle.kts

@@ -0,0 +1,36 @@
+import com.apollographql.apollo3.gradle.api.ApolloExtension
+
+buildscript {
+  apply(from = "../../../gradle/dependencies.gradle")
+
+  repositories {
+    maven {
+      url = uri("../../../build/localMaven")
+    }
+    mavenCentral()
+  }
+  dependencies {
+    classpath(groovy.util.Eval.x(project, "x.dep.apollo.plugin"))
+    // This project is run with Gradle 5.4 and Kotlin 1.5 doesn't support that so stick with 1.4.32
+    classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:KOTLIN_VERSION")
+  }
+}
+
+apply(plugin = "org.jetbrains.kotlin.jvm")
+apply(plugin = "com.apollographql.apollo3")
+
+repositories {
+  maven {
+    url = uri("../../../build/localMaven")
+  }
+  mavenCentral()
+}
+
+dependencies {
+  add("implementation", groovy.util.Eval.x(project, "x.dep.apollo.api"))
+}
+
+configure<ApolloExtension> {
+  packageName.set("com.example")
+}
+

apollo-gradle-plugin/testProjects/kotlin-plugin-version/src/main/graphql/operation.graphql

@@ -0,0 +1,3 @@
+query GetRandom {
+    random
+}

apollo-gradle-plugin/testProjects/kotlin-plugin-version/src/main/graphql/schema.graphqls

@@ -0,0 +1,3 @@
+type Query {
+    random: String
+}

benchmark/build.gradle.kts

@@ -11,7 +11,7 @@ buildscript {
   }
   dependencies {
     classpath(groovy.util.Eval.x(project, "x.dep.android.plugin"))
-    classpath(groovy.util.Eval.x(project, "x.dep.kotlin.plugin"))
+    classpath(groovy.util.Eval.x(project, "x.dep.kotlinPlugin"))
     classpath(groovy.util.Eval.x(project, "x.dep.kspGradlePlugin"))
 
     classpath("com.apollographql.apollo3:apollo-gradle-plugin:${properties.get("apolloVersion")}")

build-logic/build.gradle.kts

@@ -26,7 +26,7 @@ dependencies {
   implementation(groovy.util.Eval.x(project, "x.dep.android.plugin"))
   implementation(groovy.util.Eval.x(project, "x.dep.gradleJapiCmpPlugin"))
   implementation(groovy.util.Eval.x(project, "x.dep.gradleMetalavaPlugin"))
-  implementation(groovy.util.Eval.x(project, "x.dep.kotlin.plugin"))
+  implementation(groovy.util.Eval.x(project, "x.dep.kotlinPlugin"))
   implementation(groovy.util.Eval.x(project, "x.dep.kotlin.coroutines"))
   implementation(groovy.util.Eval.x(project, "x.dep.sqldelight.plugin"))
   implementation(groovy.util.Eval.x(project, "x.dep.gradlePublishPlugin"))

build-logic/settings.gradle.kts

@@ -10,7 +10,7 @@ pluginManagement {
   resolutionStrategy {
     eachPlugin {
       if (requested.id.id.startsWith("org.jetbrains.kotlin.jvm")) {
-        useModule(groovy.util.Eval.x(settings, "x.dep.kotlin.plugin"))
+        useModule(groovy.util.Eval.x(settings, "x.dep.kotlinPlugin"))
       }
     }
   }

gradle/dependencies.gradle

@@ -10,6 +10,7 @@ def versions = [
     jetbrainsAnnotations: '13.0',
     junit               : '4.13.2',
     kotlin              : '1.5.31',
+    kotlinPluginMin     : '1.4.0',
     kotlinCoroutines    : '1.5.1',
     moshi               : '1.12.0',
     moshix              : '0.13.0',
@@ -58,7 +59,6 @@ ext.dep = [
     junit                    : "junit:junit:$versions.junit",
     kotlinJunit              : "org.jetbrains.kotlin:kotlin-test", // the Kotlin plugin resolves the version
     kotlin                   : [
-        plugin            : "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlin",
         coroutines        : "org.jetbrains.kotlinx:kotlinx-coroutines-core:$versions.kotlinCoroutines",
         coroutinesRx2     : "org.jetbrains.kotlinx:kotlinx-coroutines-rx2:$versions.kotlinCoroutines",
         coroutinesRx3     : "org.jetbrains.kotlinx:kotlinx-coroutines-rx3:$versions.kotlinCoroutines",
@@ -122,7 +122,9 @@ ext.dep = [
     minGradleApi             : "dev.gradleplugins:gradle-api:5.6",
     graphqlKotlin            : "com.expediagroup:graphql-kotlin-spring-server:4.1.0",
     testParameterInjector    : "com.google.testparameterinjector:test-parameter-injector:1.4",
-    binaryCompatibilityValidator: "org.jetbrains.kotlinx:binary-compatibility-validator:0.8.0-RC"
+    binaryCompatibilityValidator: "org.jetbrains.kotlinx:binary-compatibility-validator:0.8.0-RC",
+    kotlinPluginMin: "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlinPluginMin",
+    kotlinPlugin: "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlin"
 ]
 ext.androidConfig = [
     compileSdkVersion: 30,