From 5326d4b01d0fd8c634c3336179d146d61c0b34b7 Mon Sep 17 00:00:00 2001
From: shedaniel <daniel@shedaniel.me>
Date: Mon, 25 Jan 2021 00:46:20 +0800
Subject: [PATCH] Skip remap if there is nothing to remap

---
 .../architect/plugin/transformers/RemapMixinVariables.kt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/main/kotlin/me/shedaniel/architect/plugin/transformers/RemapMixinVariables.kt b/src/main/kotlin/me/shedaniel/architect/plugin/transformers/RemapMixinVariables.kt
index 11abc23..4d87eb4 100644
--- a/src/main/kotlin/me/shedaniel/architect/plugin/transformers/RemapMixinVariables.kt
+++ b/src/main/kotlin/me/shedaniel/architect/plugin/transformers/RemapMixinVariables.kt
@@ -16,8 +16,12 @@ object RemapMixinVariables : Transformer {
     override fun invoke(project: Project, input: Path, output: Path) {
         val loomExtension = project.extensions.getByType(LoomGradleExtension::class.java)
         var remapperBuilder = TinyRemapper.newRemapper()
+        var requiresRemap = false
         for (mixinMapFile in loomExtension.allMixinMappings) {
             if (mixinMapFile.exists()) {
+                if (!requiresRemap) {
+                    requiresRemap = Files.readAllLines(mixinMapFile.toPath()).count { it.isNotBlank() } > 1
+                }
                 remapperBuilder = remapperBuilder.withMappings(
                     TinyUtils.createTinyMappingProvider(
                         mixinMapFile.toPath(),
@@ -28,6 +32,11 @@ object RemapMixinVariables : Transformer {
             }
         }
 
+        if (!requiresRemap) {
+            Files.copy(input, output)
+            return
+        }
+
         val remapper = remapperBuilder.build()
 
         val classpathFiles: Set<File> = LinkedHashSet(