From be2b1d3c66f0ff2d475ce0e2d3c8672367ea6dbb Mon Sep 17 00:00:00 2001
From: Him188 <Him188@mamoe.net>
Date: Wed, 29 Dec 2021 16:16:45 +0000
Subject: [PATCH] Do not write file if contents are equal

---
 .../main/kotlin/BinaryCompatibilityConfigurator.kt   | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/buildSrc/src/main/kotlin/BinaryCompatibilityConfigurator.kt b/buildSrc/src/main/kotlin/BinaryCompatibilityConfigurator.kt
index 2ed88a169..00a8499f5 100644
--- a/buildSrc/src/main/kotlin/BinaryCompatibilityConfigurator.kt
+++ b/buildSrc/src/main/kotlin/BinaryCompatibilityConfigurator.kt
@@ -46,17 +46,23 @@ object BinaryCompatibilityConfigurator {
 
     private fun Project.getValidatorDir(dir: File) = ":validator" + project.path + ":${dir.name}"
 
+    private fun File.writeTextIfNeeded(text: String) {
+        if (!this.exists()) return this.writeText(text)
+        if (this.readText() == text) return
+        return this.writeText(text)
+    }
+
     /**
      * @param targetName `null` for JVM projects.
      */
     fun createValidator(project: Project, dir: File, targetName: String?) {
-        dir.resolve("build.gradle.kts").writeText(
+        dir.resolve("build.gradle.kts").writeTextIfNeeded(
             applyTemplate(
                 project.path,
                 if (targetName == null) "classes/kotlin/main" else "classes/kotlin/$targetName/main"
             )
         )
-        dir.resolve(".gitignore").writeText(
+        dir.resolve(".gitignore").writeTextIfNeeded(
             this::class.java.classLoader
                 .getResourceAsStream("binary-compatibility-validator-ignore.txt")!!.readBytes().decodeToString()
         )
@@ -78,4 +84,4 @@ object BinaryCompatibilityConfigurator {
             .replace("$\$BUILD_DIR$$", buildDir)
             .replace("$\$PLUGIN_VERSION$$", Versions.binaryValidator)
     }
-}
\ No newline at end of file
+}