Re: [PATCH] rust: rust_is_available: support testing with `bash` as `/bin/sh`

["Onur Özkan" <work@onurozkan.dev>]

On Sun, 19 Jul 2026 15:07:23 +0200
Miguel Ojeda <ojeda@kernel.org> wrote:

> `command -v` behaves differently on `dash` vs. `bash` when faced with
> a file without the execute bit.
> 
> Thus, for the non-executable `rustc` and `bindgen` tests, support both
> possible outputs that the script currently gives.
> 
> This makes the test script clean on distributions like Fedora.
> 
> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
> ---
> Independently, we could add a custom check for the non-exec case in the
> actual shell script, but back then it was decided with Kbuild to avoid
> overcomplicating it for rare cases (which anyway give an error).
> 
>  scripts/rust_is_available_test.py | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/rust_is_available_test.py b/scripts/rust_is_available_test.py
> index d6d54b7ea42a..752c59d5f55f 100755
> --- a/scripts/rust_is_available_test.py
> +++ b/scripts/rust_is_available_test.py
> @@ -177,7 +177,12 @@ else:
> 
>      def test_rustc_nonexecutable(self):
>          result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.nonexecutable })
> -        self.assertIn(f"Running '{self.nonexecutable}' to check the Rust compiler version failed with", result.stderr)
> +        self.assertTrue(
> +            # `dash`.
> +            f"Running '{self.nonexecutable}' to check the Rust compiler version failed with" in result.stderr or
> +            # `bash`.
> +            f"Rust compiler '{self.nonexecutable}' could not be found." in result.stderr
> +        )
> 
>      def test_rustc_unexpected_binary(self):
>          result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.unexpected_binary })
> @@ -205,7 +210,12 @@ else:
> 
>      def test_bindgen_nonexecutable(self):
>          result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.nonexecutable })
> -        self.assertIn(f"Running '{self.nonexecutable}' to check the Rust bindings generator version failed with", result.stderr)
> +        self.assertTrue(
> +            # `dash`.
> +            f"Running '{self.nonexecutable}' to check the Rust bindings generator version failed with" in result.stderr or
> +            # `bash`.
> +            f"Rust bindings generator '{self.nonexecutable}' could not be found." in result.stderr
> +        )
> 
>      def test_bindgen_unexpected_binary(self):
>          result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.unexpected_binary })
> 
> base-commit: 880c43b185ca52239e75bc546cc4f4d9154d0fed
> --
> 2.55.0

Nit: You can add some useful failure message, something like "$binary could not
found in the system". The default failure message for assertTrue is something
like "False is not True", which is not helpful. But the failed lines will also
be printed so it's not entirely unclear as well.

With/without that:

Reviewed-by: Onur Özkan <work@onurozkan.dev>