no custom driver

src/driver.rs

@@ -1,38 +1,7 @@
-#![allow(rustc::diagnostic_outside_of_impl)]
-#![allow(rustc::untranslatable_diagnostic)]
 #![feature(rustc_private)]
-#![feature(let_chains)]
-#![feature(lazy_cell)]
-#![feature(lint_reasons)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
-// warn on lints, that are included in `rust-lang/rust`s bootstrap
-#![warn(rust_2018_idioms, unused_lifetimes)]
-// warn on rustc internal lints
-#![warn(rustc::internal)]
 
-// FIXME: switch to something more ergonomic here, once available.
-// (Currently there is no way to opt into sysroot crates without `extern crate`.)
 extern crate rustc_driver;
-extern crate rustc_session;
-
-use rustc_session::config::ErrorOutputType;
-use rustc_session::EarlyDiagCtxt;
-
-use std::env;
-use std::process::exit;
-
-struct ClippyCallbacks;
-
-impl rustc_driver::Callbacks for ClippyCallbacks {}
 
 pub fn main() {
-    let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
-
-    rustc_driver::init_rustc_env_logger(&early_dcx);
-
-    exit(rustc_driver::catch_with_exit_code(move || {
-        let args: Vec<String> = env::args().collect();
-
-        rustc_driver::RunCompiler::new(&args, &mut ClippyCallbacks {}).run()
-    }))
+    rustc_driver::main();
 }