Write cache version only if incremental compilation is enabled

Original commit: b6bbc4015b

jps/jps-plugin/src/org/jetbrains/kotlin/jps/incremental/CacheFormatVersion.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.jps.incremental
 
 import org.jetbrains.annotations.TestOnly
+import org.jetbrains.kotlin.config.IncrementalCompilation
 import org.jetbrains.kotlin.jps.build.KotlinBuilder
 import org.jetbrains.kotlin.load.java.JvmAbi
 import java.io.File
@@ -37,6 +38,7 @@ class CacheFormatVersion(targetDataRoot: File) {
     private val file = File(targetDataRoot, FORMAT_VERSION_FILE_PATH)
 
     fun isIncompatible(): Boolean {
+        assert(IncrementalCompilation.ENABLED) { "Incremental compilation is not enabled" }
         if (!file.exists()) return false
 
         val versionNumber = file.readText().toInt()

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalLazyCachesTest.kt

@@ -17,8 +17,10 @@
 package org.jetbrains.kotlin.jps.build
 
 import com.intellij.testFramework.UsefulTestCase
+import org.jetbrains.kotlin.config.IncrementalCompilation
 import org.jetbrains.kotlin.jps.incremental.IncrementalCacheImpl
 import org.jetbrains.kotlin.jps.incremental.getCacheDirectoryName
+import org.jetbrains.kotlin.jps.incremental.getKotlinCacheVersion
 import org.jetbrains.kotlin.utils.Printer
 import java.io.File
 
@@ -41,6 +43,11 @@ public abstract class AbstractIncrementalLazyCachesTest : AbstractIncrementalJps
             p.println(target)
             p.pushIndent()
 
+            val cacheVersion = paths.getKotlinCacheVersion(target)
+            if (cacheVersion.formatVersionFile.exists()) {
+                p.println(cacheVersion.formatVersionFile.name)
+            }
+
             val dataRoot = paths.getTargetDataRoot(target)
             val cacheNames = kotlinCacheNames(dataRoot)
             cacheNames.sorted().forEach { p.println(it) }

jps/jps-plugin/testData/incremental/lazyKotlinCaches/class/expected-kotlin-caches.txt

@@ -1,4 +1,6 @@
 Module 'module' production
+    format-version.txt
     proto.tab
     source-to-classes.tab
 Module 'module' tests
+    format-version.txt

jps/jps-plugin/testData/incremental/lazyKotlinCaches/function/expected-kotlin-caches.txt

@@ -1,5 +1,7 @@
 Module 'module' production
+    format-version.txt
     package-parts.tab
     proto.tab
     source-to-classes.tab
 Module 'module' tests
+    format-version.txt

jps/jps-plugin/testData/incremental/lazyKotlinCaches/inlineFunctionDeclared/expected-kotlin-caches.txt

@@ -1,6 +1,8 @@
 Module 'module' production
+    format-version.txt
     inline-functions.tab
     package-parts.tab
     proto.tab
     source-to-classes.tab
 Module 'module' tests
+    format-version.txt

jps/jps-plugin/testData/incremental/lazyKotlinCaches/inlineFunctionInlined/expected-kotlin-caches.txt

@@ -1,7 +1,9 @@
 Module 'module' production
+    format-version.txt
     inline-functions.tab
     inlined-to.tab
     package-parts.tab
     proto.tab
     source-to-classes.tab
 Module 'module' tests
+    format-version.txt