(fix) Prevent protos from being cleaned

build.gradle

@@ -39,6 +39,8 @@ protobuf {
 			artifact = 'us.hebi.quickbuf:protoc-gen-quickbuf:1.3.1'
 		}
 	}
+
+    if (System.getenv("GENERATE_PROTO") == "true") {
         generateProtoTasks {
             all().each { task ->
                 task.builtins {
@@ -52,6 +54,8 @@ protobuf {
                 }
             }
         }
+    }
+
 	generatedFilesBaseDir = "$projectDir/src/generated/"
 }