Pick Kotlin stdlib based on compiled Kotlin version

- Ignore path when comparing versions
- Pick the local Kotlin stdlib version based on the compiled version.
  This prevents potential issues in case there are multiple Kotlin
  versions used on the same machine.

shared/src/main/kotlin/org/javacs/kt/classpath/BackupClassPathResolver.kt

@@ -3,11 +3,12 @@ package org.javacs.kt.classpath
 import java.io.File
 import java.nio.file.Files
 import java.nio.file.Path
+import java.nio.file.Paths
 import java.nio.file.attribute.BasicFileAttributes
 import java.util.function.BiPredicate
-import org.javacs.kt.util.tryResolving
+import kotlin.math.min
 import org.javacs.kt.util.findCommandOnPath
-import java.nio.file.Paths
+import org.javacs.kt.util.tryResolving
 
 /** Backup classpath that find Kotlin in the user's Maven/Gradle home or kotlinc's libraries folder. */
 object BackupClassPathResolver : ClassPathResolver {
@@ -27,24 +28,13 @@ private fun findLocalArtifact(group: String, artifact: String) =
 private fun tryFindingLocalArtifactUsing(@Suppress("UNUSED_PARAMETER") group: String, artifact: String, artifactDirResolution: LocalArtifactDirectoryResolution): Path? {
  val isCorrectArtifact = BiPredicate<Path, BasicFileAttributes> { file, _ ->
  val name = file.fileName.toString()
- when (artifactDirResolution.buildTool) {
- "Maven" -> {
- val version = file.parent.fileName.toString()
- val expected = "${artifact}-${version}.jar"
- name == expected
- }
- else -> name.startsWith(artifact) && name.endsWith(".jar")
- }
+ name == "$artifact-${KotlinVersion.CURRENT}.jar"
  }
  return Files.list(artifactDirResolution.artifactDir)
  .sorted(::compareVersions)
  .findFirst()
  .orElse(null)
- ?.let {
- Files.find(artifactDirResolution.artifactDir, 3, isCorrectArtifact)
- .findFirst()
- .orElse(null)
- }
+ ?.let { Files.find(artifactDirResolution.artifactDir, 3, isCorrectArtifact).findFirst().orElse(null) }
 }
 
 private data class LocalArtifactDirectoryResolution(val artifactDir: Path?, val buildTool: String)
@@ -105,7 +95,7 @@ private fun compareVersions(left: Path, right: Path): Int {
  val leftVersion = extractVersion(left)
  val rightVersion = extractVersion(right)
 
- for (i in 0 until Math.min(leftVersion.size, rightVersion.size)) {
+ for (i in 0 until min(leftVersion.size, rightVersion.size)) {
  val leftRev = leftVersion[i].reversed()
  val rightRev = rightVersion[i].reversed()
  val compare = leftRev.compareTo(rightRev)
@@ -116,6 +106,6 @@ private fun compareVersions(left: Path, right: Path): Int {
  return -leftVersion.size.compareTo(rightVersion.size)
 }
 private fun extractVersion(artifactVersionDir: Path): List<String> {
- return artifactVersionDir.toString().split(".")
+ return artifactVersionDir.toString().split("/").last().split(".")
 }