Re: How to find versions from ostree repo

[Dan Nicholson <nicholson endlessm com>]

On Mon, Aug 6, 2018 at 8:43 AM, Cristian Falcas via ostree-list
<ostree-list gnome org> wrote:
> Hello,
>
> Where is the version for a specific commit kept in the repo?
>
> I can see the commit at
> $REPONAME/refs/heads/fedora/27/x86_64/atomic-host-kubernetes, but I can't
> find the version. For me it's something like this:
> ```
> # rpm-ostree status
> State: idle; auto updates disabled
> Deployments:
> * ostree://our_custom_repo:fedora/27/x86_64/atomic-host-kubernetes
>                    Version: 27.20180801_1740.0 (2018-08-03 15:00:29)
>                     Commit:
> 86370353a42b9dc68acab17a4b950a23af4ac1eb63af10bb162ff3c00a4ff210
>               GPGSignature: Valid signature by
> 3A362F3C67B04FEBF704CDA84F34A4152F54FEF1
> ```

The version is kept in the commit metadata key version. You can get it
out with show --print-metadata-key. Here's an example in the Endless
OS repo:

$ ostree show --print-metadata-key=version os/eos/amd64/eos3a
'3.4.6'

> Also, I'm trying to keep the repo in s3, and for this I'm doing something
> like:
>
> ```
> rpm-ostree compose tree --cachedir=/srv/cache --repo=$REPONAME
> /srv/fedora-atomic//fedora-atomic-kubernetes.json
> aws s3 sync $REPONAME s3://$S3BUCKET/$REPONAME --acl public-read
> ```
>
> But this always keeps only the latest version. Is there a way to make
> rpm-ostree keep all versions built? I copied the file
> $REPONAME/refs/heads/fedora/27/x86_64/atomic-host-kubernetes to a new build,
> but the content is overwritten.

This is dependent on how rpm-ostree makes commits. If it keeps
history, then the old versions are just ancestors to the
fedora/27/x86_64/atomic-host-kubernetes ref. But maybe rpm-ostree
compose prunes all but the latest commit. You'd have to look at what
rpm-ostree does, but you can run ostree log from the local repo to
see:

ostree --repo=$REPONAME log fedora/27/x86_64/atomic-host-kubernetes

If there are multiple commits, then you can reference them by adding ^
after the ref sort of like git. For example,
fedora/27/x86_64/atomic-host-kubernetes^^ would be two commits prior
to the ref head.

--
Dan