linux-kernel - Re: [PATCH 5/6] rust: support running Rust documentation tests as KUnit ones

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Date:   Thu, 15 Jun 2023 00:09:00 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Alice Ryhl <aliceryhl@...gle.com>
Cc:     ojeda@...nel.org, alex.gaynor@...il.com, benno.lossin@...ton.me,
        bjorn3_gh@...tonmail.com, boqun.feng@...il.com,
        brendan.higgins@...ux.dev, davidgow@...gle.com, gary@...yguo.net,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, nmi@...aspace.dk,
        patches@...ts.linux.dev, philip.li@...el.com,
        rust-for-linux@...r.kernel.org, wedsonaf@...il.com
Subject: Re: [PATCH 5/6] rust: support running Rust documentation tests as
 KUnit ones

On Wed, Jun 14, 2023 at 10:38 PM Alice Ryhl <aliceryhl@...gle.com> wrote:
>
> This could just be
>
> std::fs::write(path, body.as_bytes());

+1, simpler, less `use`s needed and less size:

     320429      12736        368     333533      516dd
scripts/rustdoc_test_builder
     314701      12440        368     327509      4ff55
scripts/rustdoc_test_builder

Thanks for the review!

Cheers,
Miguel

diff --git a/scripts/rustdoc_test_builder.rs b/scripts/rustdoc_test_builder.rs
index e3b7138fb4f9..e5894652f12c 100644
--- a/scripts/rustdoc_test_builder.rs
+++ b/scripts/rustdoc_test_builder.rs
@@ -15,8 +15,7 @@
 //! from that. For the moment, we generate ourselves a new name,
`{file}_{number}` instead, in
 //! the `gen` script (done there since we need to be aware of all the
tests in a given file).

-use std::fs::File;
-use std::io::{BufWriter, Read, Write};
+use std::io::Read;

 fn main() {
     let mut stdin = std::io::stdin().lock();
@@ -69,5 +68,5 @@ fn main() {

     let path = format!("rust/test/doctests/kernel/{name}");

-    write!(BufWriter::new(File::create(path).unwrap()), "{body}").unwrap();
+    std::fs::write(path, body.as_bytes()).unwrap();
 }