Simplify min Kotlin version check (#1839)

Author: Goooler

src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/ShadowKmpPlugin.kt

@@ -1,6 +1,6 @@
 package com.github.jengelman.gradle.plugins.shadow
 
-import com.github.jengelman.gradle.plugins.shadow.internal.isAtLeastKgpVersion
+import com.github.jengelman.gradle.plugins.shadow.internal.isAtLeastKgp
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar.Companion.SHADOW_JAR_TASK_NAME
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar.Companion.registerShadowJarCommon
 import org.gradle.api.Plugin
@@ -36,7 +36,7 @@ public abstract class ShadowKmpPlugin : Plugin<Project> {
         },
       )
 
-      if (!isAtLeastKgpVersion(1, 9, 0)) return@registerShadowJarCommon
+      if (!isAtLeastKgp("1.9.0")) return@registerShadowJarCommon
 
       @OptIn(ExperimentalKotlinGradlePluginApi::class)
       target.mainRun {

src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/internal/KotlinCompat.kt

@@ -5,16 +5,16 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinBasePlugin
 
 internal const val KOTLIN_MULTIPLATFORM_PLUGIN_ID = "org.jetbrains.kotlin.multiplatform"
 
-internal fun Project.isAtLeastKgpVersion(
-  major: Int,
-  minor: Int,
-  patch: Int,
+internal fun Project.isAtLeastKgp(
+  version: String,
   id: String = KOTLIN_MULTIPLATFORM_PLUGIN_ID,
 ): Boolean {
-  val plugin = plugins.getPlugin(id) as KotlinBasePlugin
-  val elements = plugin.pluginVersion.takeWhile { it != '-' }.split(".")
-  val kgpMajor = elements[0].toInt()
-  val kgpMinor = elements[1].toInt()
-  val kgpPatch = elements[2].toInt()
-  return kgpMajor > major || (kgpMajor == major && (kgpMinor > minor || (kgpMinor == minor && kgpPatch >= patch)))
+  val (major, minor, patch) = version.normalizeVersion()
+  val (actualMajor, actualMinor, actualPatch) = (plugins.getPlugin(id) as KotlinBasePlugin).pluginVersion.normalizeVersion()
+  return KotlinVersion(actualMajor, actualMinor, actualPatch) >= KotlinVersion(major, minor, patch)
+}
+
+private fun String.normalizeVersion(): Triple<Int, Int, Int> {
+  val (major, minor, patch) = takeWhile { it != '-' }.split(".").map { it.toInt() }
+  return Triple(major, minor, patch)
 }