Build: Extract compiler version to separate module to improve caching

Compiler version changes every build and makes impossible to reuse
caches for heavy tasks such as compiler proguard. We may fix that by
adding version module directly to the final jar.

prepare/compiler/build.gradle.kts

@@ -15,6 +15,7 @@ plugins {
 val fatJarContents by configurations.creating
 val fatJarContentsStripMetadata by configurations.creating
 val fatJarContentsStripServices by configurations.creating
+val compilerVersion by configurations.creating
 
 // JPS build assumes fat jar is built from embedded configuration,
 // but we can't use it in gradle build since slightly more complex processing is required like stripping metadata & services from some jars
@@ -139,9 +140,13 @@ dependencies {
         )
     )
 
-    compilerModules.forEach {
-        fatJarContents(project(it)) { isTransitive = false }
-    }
+    compilerVersion(project(":compiler:compiler.version"))
+    proguardLibraries(project(":compiler:compiler.version"))
+    compilerModules
+        .filter { it != ":compiler:compiler.version" } // Version will be added directly to the final jar excluding proguard and relocation
+        .forEach {
+            fatJarContents(project(it)) { isTransitive = false }
+        }
 
     libraries(intellijDep()) { includeIntellijCoreJarDependencies(project) { it.startsWith("trove4j") } }
     libraries(commonDep("io.ktor", "ktor-network"))
@@ -272,11 +277,16 @@ val distDir: String by rootProject.extra
 
 val jar = runtimeJar {
     dependsOn(pack)
+    dependsOn(compilerVersion)
 
     from {
         zipTree(pack.get().outputs.files.singleFile)
     }
 
+    from {
+        compilerVersion.map(::zipTree)
+    }
+
     manifest.attributes["Class-Path"] = compilerManifestClassPath
     manifest.attributes["Main-Class"] = "org.jetbrains.kotlin.cli.jvm.K2JVMCompiler"
 }