Update build.rs

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+# [4.0.8] 2022-08-12
+
+- Add tracing to dataloader methods when the tracing feature is enabled. [#996](https://github.com/async-graphql/async-graphql/pull/996)
+
 # [4.0.7] 2022-08-09
 
 - Limit parser recursion depth to `64`.

parser/build.rs

@@ -24,6 +24,9 @@ struct GraphQLParser;
     let tokens = pest_generator::derive_parser(input, false);
     let new = tokens.to_string();
     let code = format!("{}\n{}", PREAMBLE, &new);
-    fs::write("./src/parse/generated.rs", code).unwrap();
+    let current_code = fs::read_to_string("./src/parse/generated.rs").unwrap();
+    if current_code != code {
+        fs::write("./src/parse/generated.rs", code).unwrap();
+    }
     Ok(())
 }