Fix compilation warnings in 'pill-importer' project

These warnings have fail compilation with bootstrap.

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/KotlinArtifactsDSLCodegen.kt

@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode
 import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import java.io.File
+import java.util.*
 
 fun main() {
     generateAbstractKotlinArtifactsExtensionImplementation()
@@ -58,9 +59,9 @@ private fun generateAbstractKotlinArtifactsExtensionImplementation() {
         val name = nameParts.drop(1).joinToString(
             separator = "",
             prefix = nameParts.first(),
-            transform = String::capitalize
+            transform = String::capitalizeUS
         )
-        "val $name = KonanTarget.${it.name.toUpperCase()}"
+        "val $name = KonanTarget.${it.name.uppercase(Locale.US)}"
     }.indented(4)
 
     val code = listOf(

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/kpmNativeVariantCodegen.kt

@@ -9,6 +9,7 @@ package org.jetbrains.kotlin.generators.gradle.dsl
 
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.target.presetName
+import java.util.*
 import kotlin.io.path.ExperimentalPathApi
 import kotlin.io.path.Path
 import kotlin.io.path.writeText
@@ -96,7 +97,7 @@ private fun allVariantConstructors() = allKonanTargets()
 
 private val KonanTarget.variantClassName
     get() = presetName
-        .capitalize()
+        .capitalizeUS()
         .let { "Kotlin${it}Variant" }
 
 private val KonanTarget.className get() = javaClass.simpleName

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/mppNativeBinaryDSLCodegen.kt

@@ -33,8 +33,8 @@ private fun binaryType(
         typeName("$MPP_PACKAGE.$className"),
         typeName("${nativeOutputKindClass.fqName}.$outputKind"),
         baseMethodName,
-        "get${baseMethodName.capitalize()}",
-        "find${baseMethodName.capitalize()}",
+        "get${baseMethodName.capitalizeUS()}",
+        "find${baseMethodName.capitalizeUS()}",
         defaultBaseName
     )
 

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/stringUtils.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.generators.gradle.dsl
+
+import java.util.*
+
+fun String.capitalizeUS() = replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.US) else it.toString() }

plugins/pill/pill-importer/src/JpsCompatiblePluginTasks.kt

@@ -91,14 +91,14 @@ class JpsCompatiblePluginTasks(
     fun pill() {
         initEnvironment(rootProject)
 
-        val variantOptionValue = System.getProperty("pill.variant", "base").toUpperCase()
+        val variantOptionValue = System.getProperty("pill.variant", "base").uppercase(Locale.US)
         val variant = PillExtensionMirror.Variant.values().firstOrNull { it.name == variantOptionValue }
             ?: run {
                 rootProject.logger.error("Invalid variant name: $variantOptionValue")
                 return
             }
 
-        rootProject.logger.lifecycle("Pill: Setting up project for the '${variant.name.toLowerCase()}' variant...")
+        rootProject.logger.lifecycle("Pill: Setting up project for the '${variant.name.lowercase(Locale.US)}' variant...")
 
         val modulePrefix = System.getProperty("pill.module.prefix", "")
         val modelParser = ModelParser(variant, modulePrefix)
@@ -161,14 +161,14 @@ class JpsCompatiblePluginTasks(
     private fun removeJpsAndPillRunConfigurations() {
         File(projectDir, ".idea/runConfigurations")
             .walk()
-            .filter { (it.name.startsWith("JPS_") || it.name.startsWith("Pill_")) && it.extension.toLowerCase() == "xml" }
+            .filter { (it.name.startsWith("JPS_") || it.name.startsWith("Pill_")) && it.extension.lowercase(Locale.US) == "xml" }
             .forEach { it.delete() }
     }
 
     private fun removeArtifactConfigurations() {
         File(projectDir, ".idea/artifacts")
             .walk()
-            .filter { it.extension.toLowerCase() == "xml" && ALLOWED_ARTIFACT_PATTERNS.none { p -> p.matches(it.name) } }
+            .filter { it.extension.lowercase(Locale.US) == "xml" && ALLOWED_ARTIFACT_PATTERNS.none { p -> p.matches(it.name) } }
             .forEach { it.delete() }
     }
 

plugins/pill/pill-importer/src/util/PathContext.kt

@@ -9,6 +9,7 @@ import org.gradle.api.Project
 import org.jetbrains.kotlin.pill.model.PModule
 import org.jetbrains.kotlin.pill.model.PProject
 import java.io.File
+import java.util.*
 
 private val USER_HOME_DIR_PATH = System.getProperty("user.home").withSlash()
 
@@ -29,7 +30,7 @@ interface PathContext {
 
     fun url(file: File): Pair<String, String> {
         val path = when {
-            file.isFile && file.extension.toLowerCase() == "jar" -> "jar://" + this(file) + "!/"
+            file.isFile && file.extension.lowercase(Locale.US) == "jar" -> "jar://" + this(file) + "!/"
             else -> "file://" + this(file)
         }