fix for fileUtils.contentEquals

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/utils/fileUtils.kt

@@ -98,7 +98,7 @@ fun contentEquals(file1: File, file2: File): Boolean {
                 }
             }
 
-            return true
+            return false
         }
     }
 }

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/FileUtilsTest.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+@file:Suppress("FunctionName")
+
+package org.jetbrains.kotlin.gradle.unitTests
+
+import com.intellij.util.io.Compressor
+import org.gradle.kotlin.dsl.support.unzipTo
+import org.jetbrains.kotlin.gradle.utils.contentEquals
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.TemporaryFolder
+import java.io.File
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+import kotlin.test.assertFalse
+import kotlin.test.fail
+
+class FileUtilsTest {
+    @get:Rule
+    val temporaryFolder = TemporaryFolder()
+
+    private val zipContentFolder by lazy {
+        temporaryFolder.newFolder().apply {
+            resolve("stub0.txt").apply {
+                parentFile.mkdirs()
+                writeText("stub0 content")
+            }
+        }
+    }
+
+    private fun newFile(name: String, text: String): File {
+        temporaryFolder.newFolder().apply {
+            resolve(name).apply {
+                parentFile.mkdirs()
+                writeText(text)
+                return this
+            }
+        }
+    }
+
+    @Test
+    fun `empty files`() {
+        val empty = newFile("a.txt", "")
+        assertTrue(contentEquals(empty, empty))
+    }
+
+    @Test
+    fun `short files`() {
+        val b = newFile("b.txt", "1")
+        val c = newFile("c.txt", "2")
+        assertTrue(contentEquals(b, b))
+        assertTrue(contentEquals(c, c))
+        assertFalse(contentEquals(b, c))
+    }
+
+    @Test
+    fun `one file is a prefix of the other`() {
+        val prefix = newFile("d.txt", "3\n")
+        val full = newFile("e.txt", "3\n4\n5\n")
+        assertFalse(contentEquals(prefix, full))
+        assertFalse(contentEquals(full, prefix))
+    }
+}