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This new `rpm-ostree ex-container` CLI is just code copied
from the `ostree-ext-cli container` binary code. In the future
I may just add the CLI code as a library API too to simplify this.
For now, I don't want to try to add a new Rust CLI as an RPM
package for example. This exposes it via rpm-ostree, and
in the future rpm-ostree may have some layering on top of this
anyways.
In Fedora CoreOS, updates are driven by Zincati and we thus completely
trust the information it gives us. The branch validation rpm-ostree does
is thus not necessary. It's also harmful in the case where the node is
extremely out of date because it may not be able to GPG verify the
commit at the tip of the branch (because the GPG key isn't yet in the
tree).
See: https://github.com/coreos/fedora-coreos-tracker/issues/749
If updates driver is registered but "stopped", ignore driver (i.e.
do not error out during deploy, rebase, ugprade).
We define "stopped" to mean the driver's `ActiveState` is not in
the following states: "active", "activating", "reloading", "failed".
This isn't important at all, but I am just trying to up my
"Rust iterator and mapping" skills. Here:
- In this case we always want to go from `Option<T>` to `Option<T>`,
so instead of destructuring `Some()` back to another `Some()`
we can use `as_mut()` to manipulate the inner vector directly.
- Now instead of destroying the inner `Vec<>` we need to use `drain()`
instead
- And then we can just `extend()` with a reversed iterator from
our explicit temporary
For some reason, in f34 the error that libostree gets now when trying to
checkout a file on top of an existing one with different content is no
longer EEXIST but EPERM.
Likely due to a change in the kernel or glibc though some quick googling
doesn't reveal anything.
`syncfs()` isn't going to do anything on e.g. `tmpfs` and even
if it did wouldn't fix any race conditions because that's about
synchronizing in memory changes to disk, but won't change
what system calls return.
Some investigation turned up
https://stackoverflow.com/questions/14392975/timestamp-accuracy-on-ext4-sub-millsecond
and `current_fs_time` is now:
https://www.kernel.org/doc/html/v5.12/core-api/timekeeping.html
Basically there's a "coarse" time that might only update once every 10ms
for example.
Let's just sleep 100ms for now.
I think we should be using the inode versions, but we can investigate
that separately.
ostree hard requires UTF-8 paths (and really we should
never have any non-UTF-8 paths in the OS in general). The
camino library has types that are both `Path` and `&str` and
has a convenient `try_into()` too to avoid us duplicating
the error handling.
This addresses the server compose side of
https://github.com/coreos/rpm-ostree/issues/2584.
One tricky bit is handling overrides across included treefiles (or
really, even within a single treefile): as usual, higher-level treefiles
should override lowel-level ones. Rust makes it pretty nice to handle.
For now this just supports a `repo` field, but one could imagine e.g.
`repos` (which takes an array of repoids instead), or e.g.
`exclude-repos`.
The actual core implementation otherwise is pretty straightforward.
This should help a lot in RHCOS where we currently use many `exclude=`
directives in repo files to get it to do what we want.
This is also kind of a requirement for modularity support because as
soon as rpm-ostree becomes modules-aware, modular filtering logic will
break composes which assume rpm-ostree treats modular and non-modular
packages the same.
