}

java.configureJavaToolChain()

dependencies {
    api(platform("gradlebuild:build-platform"))
    implementation("gradlebuild:gradle-plugin")

    testImplementation("org.junit.vintage:junit-vintage-engine")
}

tasks.withType<KotlinCompile>().configureEach {
    compilerOptions {
        allWarningsAsErrors = true
    }
}

ktlint {
    filter {
        exclude("gradle/kotlin/dsl/accessors/_*/**")

<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Test: Kotlin Gradle Plugin / functionalTest" type="GradleRunConfiguration" factoryName="Gradle" folderName="Tests">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />

<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Test: Kotlin Gradle Plugin / functionalTest / unit" type="GradleRunConfiguration" factoryName="Gradle" folderName="Tests">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />

<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Test: Kotlin Gradle Plugin / functionalTest / regression" type="GradleRunConfiguration" factoryName="Gradle" folderName="Tests">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />

<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Test: Kotlin Gradle Plugin / functionalTest / dependency resolution" type="GradleRunConfiguration" factoryName="Gradle" folderName="Tests">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />

        // Plugins
        // ----------------------------------------------------------------------

        List<Plugin> plugins = project.getBuildPlugins();

        // Plugin0 [plexus]

        String key = "org.apache.maven.plugins:maven-plexus-plugin";

        Plugin plugin = null;
        for (Plugin check : plugins) {
            if (key.equals(check.getKey())) {

<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>tests.project</groupId>
    <artifactId>duplicate-plugin-defs-merged</artifactId>
    <version>1</version>

    <build>
      <plugins>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <dependencies>
            <dependency>
              <groupId>group</groupId>
              <artifactId>first</artifactId>
              <version>1</version>

     1. plugin goal execution in a child is usually simply appended (at end): you can't try to insert in the middle of pre-existing inherited executions,

     2. append happens at plugin level first, then goal level, independently from phases.
        This means for example that adding pluginA:goal2 to pre-existing (pluginA:goal1, pluginB:goal) will lead to (pluginA:goal1, pluginA:goal2, pluginB:goal)

        return "src/test/projects/plugin-manager";
    }

    @Test
    void testPluginLoading() throws Exception {
        MavenSession session = createMavenSession(null);
        Plugin plugin = new Plugin();
        plugin.setGroupId("org.apache.maven.its.plugins");
        plugin.setArtifactId("maven-it-plugin");
        plugin.setVersion("0.1");

          <version>0.1</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-jar-plugin</artifactId>
          <version>0.1</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-plugin-plugin</artifactId>
          <version>0.1</version>
        </plugin>
        <plugin>