[build][version] replace old version string parsing with regex

shared/buildSrc/src/main/kotlin/org/jetbrains/kotlin/VersionGenerator.kt

@@ -32,16 +32,20 @@ open class VersionGenerator: DefaultTask() {
         } ?: "MetaVersion.DEV"
 
 
+    private val versionPattern = "(\\d+)\\.(\\d+)(?:\\.(\\d+))?(?:-M(\\p{Digit}))?(?:-(\\p{Alpha}\\p{Alnum}*))?(?:-(\\d+))?".toRegex()
+
     override fun configure(closure: Closure<*>): Task {
         val result = super.configure(closure)
         doFirst {
             val content = buildString {
                 operator fun String.unaryPlus() = this@buildString.append(this)
-                val version = konanVersion.split(".")
-                val major = version[0].toInt()
-                val minor = version[1].toInt()
-                val maintenance = if (version.size > 2) version[2].toInt() else 0
-                val milestone = konanVersion.split("-M").getOrNull(1)?.toInt() ?: -1
+                val (majorStr, minorStr, maintenanceStr, milestoneStr) =
+                        versionPattern.matchEntire(konanVersion)?.destructured
+                                ?: throw IllegalArgumentException("Cannot parse Kotlin/Native version: $konanVersion")
+                val major = majorStr.toInt()
+                val minor = minorStr.toInt()
+                val maintenance = maintenanceStr.toIntOrNull() ?: 0
+                val milestone = milestoneStr.toIntOrNull() ?: -1
                 project.logger.info("BUILD_NUMBER: $buildNumber")
                 val build = buildNumber?.let {
                     it.split("-").last().toInt() //7-dev-buildcount