Drop support for gradle 4.0

#KT-29275 Fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/AbstractKotlinAndroidGradleTests.kt

@@ -233,7 +233,7 @@ class KotlinAndroid32GradleIT : KotlinAndroid3GradleIT(androidGradlePluginVersio
 
 class KotlinAndroid30GradleIT : KotlinAndroid3GradleIT(androidGradlePluginVersion = AGPVersion.v3_0_0) {
     override val defaultGradleVersion: GradleVersionRequired
-        get() = GradleVersionRequired.InRange("4.1", "4.10.2")
+        get() = GradleVersionRequired.Until("4.10.2")
 }
 
 abstract class KotlinAndroid3GradleIT(androidGradlePluginVersion: AGPVersion) : AbstractKotlinAndroidGradleTests(androidGradlePluginVersion) {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/GradleVersionRequired.kt

@@ -21,7 +21,7 @@ import org.junit.Assume
 
 sealed class GradleVersionRequired(val minVersion: String, val maxVersion: String?) {
     companion object {
-        const val OLDEST_SUPPORTED = "4.0"
+        const val OLDEST_SUPPORTED = "4.1"
     }
 
     class Exact(version: String) : GradleVersionRequired(version, version)
@@ -30,6 +30,8 @@ sealed class GradleVersionRequired(val minVersion: String, val maxVersion: Strin
 
     class InRange(minVersion: String, maxVersion: String) : GradleVersionRequired(minVersion, maxVersion)
 
+    class Until(maxVersion: String) : GradleVersionRequired(OLDEST_SUPPORTED, maxVersion)
+
     object None : GradleVersionRequired(GradleVersionRequired.OLDEST_SUPPORTED, null)
 }
 

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kapt3AndroidIT.kt

@@ -24,7 +24,7 @@ open class Kapt3AndroidIT : Kapt3BaseIT() {
         get() = AGPVersion.v3_0_0
 
     override val defaultGradleVersion: GradleVersionRequired
-        get() = GradleVersionRequired.InRange("4.1", "4.10.2")
+        get() = GradleVersionRequired.Until("4.10.2")
 
     override fun defaultBuildOptions() =
         super.defaultBuildOptions().copy(

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -142,7 +142,7 @@ class Kotlin2JsGradlePluginIT : BaseGradleIT() {
 
     @Test
     fun testJsCustomSourceSet() {
-        val project = Project("kotlin2JsProjectWithCustomSourceset", GradleVersionRequired.AtLeast("4.0"))
+        val project = Project("kotlin2JsProjectWithCustomSourceset")
 
         project.build("build") {
             assertSuccessful()
@@ -341,7 +341,7 @@ class Kotlin2JsGradlePluginIT : BaseGradleIT() {
     }
 
     @Test
-    fun testIncrementalCompilationDisabled() = Project("kotlin2JsICProject", GradleVersionRequired.AtLeast("4.0")).run {
+    fun testIncrementalCompilationDisabled() = Project("kotlin2JsICProject").run {
         val options = defaultBuildOptions().copy(incrementalJs = false)
 
         build("build", options = options) {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KotlinGradlePluginIT.kt

@@ -517,7 +517,7 @@ class KotlinGradleIT : BaseGradleIT() {
 
     @Test
     fun testSrcDirTaskDependency() {
-        Project("simpleProject", GradleVersionRequired.AtLeast("4.1")).apply {
+        Project("simpleProject").apply {
             setupWorkingDir()
             File(projectDir, "build.gradle").appendText(
                 """${'\n'}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/PluginsDslIT.kt

@@ -50,12 +50,11 @@ class PluginsDslIT : BaseGradleIT() {
     }
 
     companion object {
-        private val GRADLE_VERSION = GradleVersionRequired.AtLeast("4.0")
         private const val DIRECTORY_PREFIX = "pluginsDsl"
 
         private fun BaseGradleIT.projectWithMavenLocalPlugins(
             projectName: String,
-            wrapperVersion: GradleVersionRequired = GRADLE_VERSION,
+            wrapperVersion: GradleVersionRequired = GradleVersionRequired.None,
             directoryPrefix: String? = DIRECTORY_PREFIX,
             minLogLevel: LogLevel = LogLevel.DEBUG
         ): Project = transformProjectWithPluginsDsl(projectName, wrapperVersion, directoryPrefix, minLogLevel)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/SimpleKotlinGradleIT.kt

@@ -84,7 +84,7 @@ class SimpleKotlinGradleIT : BaseGradleIT() {
 
     @Test
     fun testDestinationDirReferencedDuringEvaluation() {
-        Project("destinationDirReferencedDuringEvaluation", GradleVersionRequired.AtLeast("4.0")).build("build") {
+        Project("destinationDirReferencedDuringEvaluation").build("build") {
             assertSuccessful()
             assertContains("GreeterTest PASSED")
         }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/TestRootAffectedIT.kt

@@ -9,7 +9,7 @@ import java.io.File
 class TestRootAffectedIT : BaseGradleIT() {
     @Test
     fun testSourceRootClassIsModifiedIC() {
-        val project = Project("kotlinProject", GradleVersionRequired.AtLeast("4.1"))
+        val project = Project("kotlinProject")
         val buildOptions = defaultBuildOptions().copy(incremental = true)
 
         project.build("build", options = buildOptions) {
@@ -58,7 +58,7 @@ class TestRootAffectedIT : BaseGradleIT() {
 
     @Test
     fun testTestRootClassIsRemovedIC() {
-        val project = Project("kotlinProject", GradleVersionRequired.AtLeast("4.1"))
+        val project = Project("kotlinProject")
         val buildOptions = defaultBuildOptions().copy(incremental = true)
 
         project.build("build", options = buildOptions) {

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinUsages.kt

@@ -73,20 +73,17 @@ object KotlinUsages {
                 chooseCandidateByName(KOTLIN_RUNTIME)
             }
 
-            // The consumer value is available and can be used for disambiguation in Gradle 4.1+
+            val javaRuntimeUsages = setOf(JAVA_RUNTIME_JARS, JAVA_RUNTIME)
-            if (isGradleVersionAtLeast(4, 1)) {
-                val javaRuntimeUsages = setOf(JAVA_RUNTIME_JARS, JAVA_RUNTIME)
 
-                if (JAVA_API in candidateNames &&
+            if (JAVA_API in candidateNames &&
-                    javaRuntimeUsages.any { it in candidateNames } &&
+                javaRuntimeUsages.any { it in candidateNames } &&
-                    values.none { it in candidateNames }
+                values.none { it in candidateNames }
-                ) {
+            ) {
-                    when (consumerValue?.name) {
+                when (consumerValue?.name) {
-                        KOTLIN_API, JAVA_API ->
+                    KOTLIN_API, JAVA_API ->
-                            chooseCandidateByName(JAVA_API)
+                        chooseCandidateByName(JAVA_API)
-                        null, KOTLIN_RUNTIME, in javaRuntimeUsages ->
+                    null, KOTLIN_RUNTIME, in javaRuntimeUsages ->
-                            chooseCandidateByName(javaRuntimeUsages.first { it in candidateNames })
+                        chooseCandidateByName(javaRuntimeUsages.first { it in candidateNames })
-                    }
                 }
             }
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/scripting/internal/ScriptingGradleSubplugin.kt

@@ -31,9 +31,6 @@ class ScriptingGradleSubplugin : Plugin<Project> {
         fun isEnabled(project: Project) = project.plugins.findPlugin(ScriptingGradleSubplugin::class.java) != null
 
         fun configureForSourceSet(project: Project, sourceSetName: String) {
-
-            if (!org.jetbrains.kotlin.gradle.utils.isGradleVersionAtLeast(4, 0)) return
-
             val discoveryConfiguration = project.configurations.maybeCreate(getDiscoveryClasspathConfigurationName(sourceSetName)).apply {
                 isVisible = false
                 isCanBeConsumed = false
@@ -45,9 +42,6 @@ class ScriptingGradleSubplugin : Plugin<Project> {
     }
 
     override fun apply(project: Project) {
-
-        if (!org.jetbrains.kotlin.gradle.utils.isGradleVersionAtLeast(4, 0)) return
-
         project.afterEvaluate {
 
             val javaPluginConvention = project.convention.findPlugin(JavaPluginConvention::class.java)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/utils/compatibiltiy.kt

@@ -46,7 +46,7 @@ internal fun TaskInputs.dirCompatible(dirPath: Any) {
     inputsDirMethod(this, dirPath)
 }
 
-internal fun checkGradleCompatibility(minSupportedVersion: GradleVersion = GradleVersion.version("4.0")) {
+internal fun checkGradleCompatibility(minSupportedVersion: GradleVersion = GradleVersion.version("4.1")) {
     val currentVersion = GradleVersion.current()
     if (currentVersion < minSupportedVersion) {
         throw GradleException(