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This is taking us closer to deeper integration in the treecompose side
with RPM instead of forking out to things.
It works except...we end up with the dreaded __db.001, .dbenv.lock
files =/ Best option would be to teach RPM how to open a database
really read-only. Failing that, could use the immutable bit?
These lock and dbenv files are created by RPM when it accesses the
database read-write, but we only want read-only. Sadly that turns out
to be very, very hard to plumb through all the layers in
hawkey/libsolv etc.
So let's just forcibily remove them after postprocessing.
Since we're only quering the database once (and at least
one of the locations is going to be read-only), don't
create the cache.
Noted while just reading the code while working on something else.
I'd been resisting this for a long time - I really wanted the tree to
be a reflection of the packages; and not go down the path of
"forking".
The lorax model has shown that while you can definitely get a large
space reduction that way, you're going to be perpetually chasing
changes in the packages. No matter how good your templates are.
Furthermore, lorax is just to generate the installer - it's an OS that
runs a single app. Whereas here we're generating the target runtime
system; we can't add bugs.
Nevertheless, reality is that sometimes it's just too hard to change
the input package set - there's a risk of breaking things. Namely,
we're introducing a new update system here, but obviously there's a
previous one: yum. Upstream packages keep growing a dependency on it.
Note this patch allows *not* removing all files from the package,
because it's possible that other things (e.g. subscription-manager)
import it as a library.
So in the meantime while we're iterating on this, let's support:
"remove-files": ["usr/bin/yum"],
The code is generic beyond yum for obvious reasons, but I don't
think we should use it for a lot more than that.
Having content in /boot in OSTree was always ugly, because we ended up
mounting over it in the deployment location at boot.
This was even worse in the anaconda rpmostreepayload code, because of
the juggling of the mount point that needed to take place.
Trying to add a GRUB2 backend to OSTree is what finally forced this
change. Now, we put kernels (in the tree) by default in *both* /boot
and /usr/lib/ostree-boot.
OSTree itself knows to look in both locations. Anaconda is going to
just hard require trees with the new location though.
This would probably be best if we invoked systemctl in the compose
tooling, but at the moment we don't have any execution of target code
on the host. It's fine to assume that it's in /usr/lib.
We can revisit this if we start doing chrooted/containerized
execution.
"atomic rebase" is mostly a copy of "ostree admin switch", so let's
also pick up the changes in ostree admin switch for the new
unconfigured state flag.
This allows a user to "atomic rebase" on an unconfigured system.
Related: #31
For the test suite, we're doing an upgrade offline of another OS root.
What we should maybe do is print the package diff from the merge
deployment, if not the booted one.
However, I think this is OK for now.
Some downstreams want the ability to separate the compose tooling from
the client, for e.g. support reasons.
This approach supports generating a tarball without the source for the
compose command, and requires specifying a config option to disable
it.
Since the treefile format now supports includes, we would need to
either include the whole chain, or just the expanded portion we use in
the compose. This patch does the latter.
This should allow a client to take the same treefile and generate a
similar tree (if they want to reproduce with the same RPMs, those can
be extracted from the RPM database inside the tree).
This improves on the check-diff option by only downloading the
/usr/share/rpm directory to do a package diff. This prevents downloading
the whole deployment and the necessity to do a cleanup later.
As a developer, a workflow I have for testing things is to create
an RPM, toss it into a local yum repository, then do a compose.
However at the moment to add the local overrides I have to edit the
treefile, which is annoying. Let's add a commandline override for
this.
Note this also deletes the old "repos_data" code which was not being
used.
In 827e711 we stopped running two yum transactions. This means the
code that detects if the repodir exists in the yum installroot will
always return false and the code is dead.
