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Message-ID: <CAH5fLgiJd3j3siCWteK-bBsnKvVrpS88vyWVV-k37SZyu2Nj8Q@mail.gmail.com>
Date: Fri, 14 Jun 2024 11:00:02 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: John Hubbard <jhubbard@...dia.com>
Cc: Miguel Ojeda <ojeda@...nel.org>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	linux-kbuild@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Makefile: rust-analyzer target: better error handling and comments

On Sat, Jun 1, 2024 at 2:49 AM John Hubbard <jhubbard@...dia.com> wrote:
>
> 1) Provide a more self-explanatory error message for the "Rust not
> available" case. Without this patch, if Rust is not set up properly
> (which happens a lot, seeing as how one must routinely run "rustup
> override ..." with each new kernel release), the "make rust-analyzer"
> invocation generates a somewhat confusing message:
>
>     "No rule to make target 'rust-analyzer"
>
> This is confusing at first, because there is, in fact, a rust-analyzer
> build target. It's just not set up to handle errors gracefully.
>
> Instead of inflicting that on the developer, just print that Rust is
> not available, with a blank line above and below, so it doesn't get lost
> in the noise. Now the error case looks like this:
>
>     $ make rust-analyzer
>
>     Rust is not available
>
>     make[1]: *** [/kernel_work/linux-github/Makefile:1975: rust-analyzer] Error 1
>     make: *** [Makefile:240: __sub-make] Error 2
>
> 2) As long as I'm there, also add some documentation about what
> rust-analyzer provides.
>
> Signed-off-by: John Hubbard <jhubbard@...dia.com>

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
Tested-by: Alice Ryhl <aliceryhl@...gle.com>

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