Right now only Fedora 39 and 40 (with updates) are able to compile
QEMU with Rust enabled. Full CI enablement requires further work to
reduce the minimum supported version of the compiler, and is not a
requirement until Rust is turned on by default.

Since a CI job based on nightly Rust will be needed later on, to
integrate clippy and have a heads-up on future clippy warnings,
adjust QEMU's 'refresh' script to customize a Fedora 40 dockerfile
with trailing text that installs nightly Rust and compiles the
latest bindgen.  A matching CI job, using --enable-rust, ensures
that the toolchain is installed correctly by the Dockerfile and
that QEMU builds with Rust enabled on at least one platform.

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Cc: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Cc: Alex Bennée <alex.bennee@linaro.org>
Based-on: <cover.1727961605.git.manos.pitsidianakis@linaro.org>

v1->v2: remove unnecessary CONFIGURE_ARGS
        add "nightly" to name of container and job

Paolo Bonzini (2):
  dockerfiles: add a Dockerfile using a nightly Rust toolchain
  gitlab-ci: add Rust-enabled CI job

 .gitlab-ci.d/buildtest.yml                    |  13 ++
 .gitlab-ci.d/containers.yml                   |   6 +
 .../dockerfiles/fedora-rust-nightly.docker    | 173 ++++++++++++++++++
 tests/lcitool/refresh                         |  26 +++
 4 files changed, 218 insertions(+)
 create mode 100644 tests/docker/dockerfiles/fedora-rust-nightly.docker

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2.46.2