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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.
This made me hesitate for a bit so add a comment about it to make it
clear. The RPMOSTREE_ASSEMBLE_TYPE_SERVER_BASE path was used by the `ex
container`, which was subsequently ripped out.
The only entrypoint so far doesn't use it (`countme`), but a future new
entrypoint will.
Also mention that the commands should add themselves to the array in
libmain.cxx if applicable so it shows up in `--help`.
`rpmvercmp()` doesn't properly compare full EVR. It needs to
be given the Version and Release separately in order to do
a comparison. For example `rpmVersionCompare()` first calls
`rpmvercmp()` to compare the Version and then checks the Release
in a second call to `rpmvercmp()`.
35739c2a22/lib/headerutil.c (L434-L440)
Let's just use `rpmverCmp()` instead, which can do the full
EVR comparison.
Fixes: https://github.com/coreos/rpm-ostree/issues/2668
Followup to https://pagure.io/fedora-infrastructure/issue/9909
In the refactor we were passing `unified_core: true` unconditionally which was wrong,
as that implies using fuse. Anyways what we really want here is an immutable bwrap
and not `rofiles-fuse` annyways. So refactor things to use that.
From https://kojipkgs.fedoraproject.org//work/tasks/7579/66867579/runroot.log
```
fuse: device not found, try 'modprobe fuse' first
fuse: device not found, try 'modprobe fuse' first
bwrap: execvp realpath: No such file or directory
fusermount: failed to unmount /tmp/rpmostree-rofiles-fuseAAphRY: Invalid argument
fusermount: failed to unmount /tmp/rpmostree-rofiles-fuseSCLs24: Invalid argument
error: Updating os-release with commit version: Running realpath: bwrap(realpath): Child process killed by signal 1
```
