Re: [Libguestfs] Cargo edition problem with Debian 11

On Fri, Jan 13, 2023 at 08:23:05PM +0000, Richard W.M. Jones wrote: I came back, went through the thread and upstream MRs and here are some things I came up with: The predicates crate since version 1.0.4 do not support rust older than 1.60.0, so it should be decided whether nbdkit wants to support Debian 11, whether nbdkit wants to support the rust plugin on systems with older rust versions and so on. Based on that decision there are ways to fix this issue. Not supporting Debian 11 is easy to achieve, of course, but probably not wanted. Not supporting older rust would just need disabling rust plugin builds with old rust in configure.ac and then on those specific systems in CI. If you want to make this work in all currently tested scenarios, then I guess adding: predicates-core = "=1.0.3" predicates-tree = "=1.0.3" to the [dev-dependencies] in Cargo.toml. That would however be applicable to all systems and necessitate future update(s). If you want to do something in the CI then the easiest place is ci/build.sh. For Cirrus CI I think it could be erased since most of it is also checked elsewhere, although not all things have been migrated to the other CI solution, like clippy, if I am correct. But another thing is, why is the minimum rust version in .cirrus.yml set to rust 1.46.0? Increasing that would clearly fix the cirrus version issue. During the adoption of libvirt-ci I knew a bit more about it, but it also keeps changing faster than me keeping eye on it. So I'm not sure about most recent changes. Hopefully what I documented in ci/ is either still true or was updated together with an lcitool update. But in hindsight I think moving the build instructions into ci/build.sh was the right choice. What lcitool does really well is abstract lot of the managing of distros, versions and package naming to make it consistent.