Refactor build script and cbindgen configuration

- Updated build.rs to use a variable for the header name and improved readability.
- Modified cbindgen.toml to reorganize export settings and enforce naming conventions for types and functions.
- Added Clippy lints in lib.rs to enhance code quality and prevent common pitfalls.

Author: sameerank

datadog-ffe-ffi/build.rs

@@ -1,8 +1,10 @@
 // Copyright 2025-Present Datadog, Inc. https://www.datadoghq.com/
 // SPDX-License-Identifier: Apache-2.0
+extern crate build_common;
 
-fn main() {
-    println!("cargo:rerun-if-changed=build.rs");
+use build_common::generate_and_configure_header;
 
-    build_common::generate_and_configure_header("datadog_ffe.h");
+fn main() {
+    let header_name = "datadog_ffe.h";
+    generate_and_configure_header(header_name);
 }

datadog-ffe-ffi/cbindgen.toml

@@ -10,14 +10,11 @@ header = """// Copyright 2025-Present Datadog, Inc. https://www.datadoghq.com/
 include_guard = "DDOG_FFE_H"
 style = "both"
 pragma_once = true
+
 no_includes = true
 sys_includes = ["stdbool.h", "stddef.h", "stdint.h"]
 includes = ["common.h"]
 
-[parse]
-parse_deps = true
-include = ["ddcommon-ffi", "datadog-ffe"]
-
 [export]
 include = ["datadog-ffe-ffi"]
 prefix = "ddog_ffe_"
@@ -28,9 +25,16 @@ renaming_overrides_prefixing = true
 "Error" = "ddog_Error"
 "Vec_u8" = "ddog_Vec_U8"
 
-[fn]
-must_use = "DDOG_CHECK_RETURN"
+[export.mangle]
+rename_types = "PascalCase"
 
 [enum]
 prefix_with_name = true
 rename_variants = "ScreamingSnakeCase"
+
+[fn]
+must_use = "DDOG_CHECK_RETURN"
+
+[parse]
+parse_deps = true
+include = ["ddcommon-ffi", "datadog-ffe"]

datadog-ffe-ffi/src/lib.rs

@@ -1,6 +1,12 @@
 // Copyright 2025-Present Datadog, Inc. https://www.datadoghq.com/
 // SPDX-License-Identifier: Apache-2.0
 
+#![cfg_attr(not(test), deny(clippy::panic))]
+#![cfg_attr(not(test), deny(clippy::unwrap_used))]
+#![cfg_attr(not(test), deny(clippy::expect_used))]
+#![cfg_attr(not(test), deny(clippy::todo))]
+#![cfg_attr(not(test), deny(clippy::unimplemented))]
+
 mod assignment;
 mod configuration;
 mod error;