KT-52217 Rename 'use-fir' to 'use-k2', update message

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinCommonOptions.kt

@@ -20,8 +20,8 @@ interface KotlinCommonOptions  : org.jetbrains.kotlin.gradle.dsl.KotlinCommonToo
      var languageVersion: kotlin.String?
 
     /**
-     * Compile using Front-end IR. Warning: this feature is far from being production-ready
+     * Compile using experimental K2. K2 is a new compiler pipeline, no compatibility guarantees are yet provided
      * Default value: false
      */
-     var useFir: kotlin.Boolean
+     var useK2: kotlin.Boolean
 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/compilerRunner/GradleKotlinCompilerRunner.kt

@@ -152,7 +152,7 @@ internal open class GradleCompilerRunner(
                         report(BooleanMetrics.JVM_COMPILER_IR_MODE, args.useIR)
                         report(StringMetrics.JVM_DEFAULTS, args.jvmDefault)
                         report(StringMetrics.USE_OLD_BACKEND, args.useOldBackend.toString())
-                        report(StringMetrics.USE_FIR, args.useFir.toString())
+                        report(StringMetrics.USE_FIR, args.useK2.toString())
                     }
                 }
                 is K2JSCompilerArguments -> {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinJsOptionsBase.kt

@@ -30,11 +30,11 @@ internal abstract class KotlinJsOptionsBase : org.jetbrains.kotlin.gradle.dsl.Ko
 
     override var languageVersion: kotlin.String? = null
 
-    private var useFirField: kotlin.Boolean? = null
-    override var useFir: kotlin.Boolean
-        get() = useFirField ?: false
+    private var useK2Field: kotlin.Boolean? = null
+    override var useK2: kotlin.Boolean
+        get() = useK2Field ?: false
         set(value) {
-            useFirField = value
+            useK2Field = value
         }
 
     private var friendModulesDisabledField: kotlin.Boolean? = null
@@ -105,7 +105,7 @@ internal abstract class KotlinJsOptionsBase : org.jetbrains.kotlin.gradle.dsl.Ko
         verboseField?.let { args.verbose = it }
         apiVersion?.let { args.apiVersion = it }
         languageVersion?.let { args.languageVersion = it }
-        useFirField?.let { args.useFir = it }
+        useK2Field?.let { args.useK2 = it }
         friendModulesDisabledField?.let { args.friendModulesDisabled = it }
         mainField?.let { args.main = it }
         metaInfoField?.let { args.metaInfo = it }
@@ -126,7 +126,7 @@ internal fun org.jetbrains.kotlin.cli.common.arguments.K2JSCompilerArguments.fil
     verbose = false
     apiVersion = null
     languageVersion = null
-    useFir = false
+    useK2 = false
     friendModulesDisabled = false
     main = "call"
     metaInfo = true

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinJvmOptionsBase.kt

@@ -30,11 +30,11 @@ internal abstract class KotlinJvmOptionsBase : org.jetbrains.kotlin.gradle.dsl.K
 
     override var languageVersion: kotlin.String? = null
 
-    private var useFirField: kotlin.Boolean? = null
-    override var useFir: kotlin.Boolean
-        get() = useFirField ?: false
+    private var useK2Field: kotlin.Boolean? = null
+    override var useK2: kotlin.Boolean
+        get() = useK2Field ?: false
         set(value) {
-            useFirField = value
+            useK2Field = value
         }
 
     private var javaParametersField: kotlin.Boolean? = null
@@ -68,7 +68,7 @@ internal abstract class KotlinJvmOptionsBase : org.jetbrains.kotlin.gradle.dsl.K
         verboseField?.let { args.verbose = it }
         apiVersion?.let { args.apiVersion = it }
         languageVersion?.let { args.languageVersion = it }
-        useFirField?.let { args.useFir = it }
+        useK2Field?.let { args.useK2 = it }
         javaParametersField?.let { args.javaParameters = it }
         jvmTarget?.let { args.jvmTarget = it }
         moduleName?.let { args.moduleName = it }
@@ -83,7 +83,7 @@ internal fun org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments.fi
     verbose = false
     apiVersion = null
     languageVersion = null
-    useFir = false
+    useK2 = false
     javaParameters = false
     jvmTarget = null
     moduleName = null

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinMultiplatformCommonOptionsBase.kt

@@ -30,11 +30,11 @@ internal abstract class KotlinMultiplatformCommonOptionsBase : org.jetbrains.kot
 
     override var languageVersion: kotlin.String? = null
 
-    private var useFirField: kotlin.Boolean? = null
-    override var useFir: kotlin.Boolean
-        get() = useFirField ?: false
+    private var useK2Field: kotlin.Boolean? = null
+    override var useK2: kotlin.Boolean
+        get() = useK2Field ?: false
         set(value) {
-            useFirField = value
+            useK2Field = value
         }
 
     internal open fun updateArguments(args: org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments) {
@@ -43,7 +43,7 @@ internal abstract class KotlinMultiplatformCommonOptionsBase : org.jetbrains.kot
         verboseField?.let { args.verbose = it }
         apiVersion?.let { args.apiVersion = it }
         languageVersion?.let { args.languageVersion = it }
-        useFirField?.let { args.useFir = it }
+        useK2Field?.let { args.useK2 = it }
     }
 }
 
@@ -53,5 +53,5 @@ internal fun org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArgumen
     verbose = false
     apiVersion = null
     languageVersion = null
-    useFir = false
+    useK2 = false
 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinProperties.kt

@@ -132,8 +132,8 @@ internal class PropertiesProvider private constructor(private val project: Proje
     val useKotlinAbiSnapshot: Boolean
         get() = booleanProperty(KOTLIN_ABI_SNAPSHOT) ?: false
 
-    val useFir: Boolean?
-        get() = booleanProperty("kotlin.useFir")
+    val useK2: Boolean?
+        get() = booleanProperty("kotlin.useK2")
 
     val keepMppDependenciesIntactInPoms: Boolean?
         get() = booleanProperty("kotlin.mpp.keepMppDependenciesIntactInPoms")

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/KotlinNativeCompilation.kt

@@ -36,8 +36,8 @@ internal class NativeCompileOptions(languageSettingsProvider: () -> LanguageSett
         set(value) {
             languageSettings.languageVersion = value
         }
-
-    override var useFir: Boolean
+    
+    override var useK2: Boolean
         get() = false
         set(@Suppress("UNUSED_PARAMETER") value) {}
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KotlinCompileConfig.kt

@@ -39,8 +39,8 @@ internal open class BaseKotlinCompileConfig<TASK : KotlinCompile> : AbstractKotl
             taskProvider.configure { task ->
                 task.incremental = propertiesProvider.incrementalJvm ?: true
 
-                if (propertiesProvider.useFir == true) {
-                    task.kotlinOptions.useFir = true
+                if (propertiesProvider.useK2 == true) {
+                    task.kotlinOptions.useK2 = true
                 }
                 task.usePreciseJavaTracking = propertiesProvider.usePreciseJavaTracking ?: true
                 task.jvmTargetValidationMode.set(propertiesProvider.jvmTargetValidationMode)