babeltrace | sink.ctf.fs: add support to create LTTng index

[MOESSBAUER, Felix]

On Mon, 2025-12-01 at 09:38 -0500, Philippe Proulx wrote:
> On Mon, Dec 1, 2025 at 4:34 AM MOESSBAUER, Felix via lttng-dev
> <lttng-dev at lists.lttng.org> wrote:
> > 
> > Hi,
> > 
> > I recently created a babeltrace pull request that adds support to
> > create an CTF LTTng index file along the CTF files [1].
> > 
> > It would be great, if someone could review it.
> 
> Thank you for your pull requests.
> 
> I'll need to look at this in detail, but I'm not against the idea,
> especially if it's guarded behind a no-by-default
> initialization parameter.

That's how I implemented it.

> 
> That being said:
> 
> • We won't review on GitHub: please submit your change to our Gerrit
>   Code Review system (<https://review.lttng.org/>).
> 
>   I know it's a bit more initial work on your side if you're not
>   familiar with Gerrit, but the review process will be much easier.
> 
>   See <https://review.lttng.org/Documentation/user-upload.html> to learn
>   how to upload a change.

It would be great to add this note to the contributing guide as well.

> 
>   For this reason, I'll close the PRs immediately.
> 
> • You'll need to add a few tests to validate your feature.

Sure. I will add them as I now known that the feature in general is
well received within the babeltrace project

> 
> • I'll deal with the documentation (manual pages) myself.

Thanks!

> 
> • Given our current workload before the end of the year, I'm not sure
>   I'll be able to review this before 2026.

No problem. For me it would be great, if you could briefly comment if
the chosen interface is OK (boolean input parameter called "create-
lttng-index"). By that, I can continue the integration in bt2-ftrace-
to-ctf [1] and once the feature becomes officially available I don't
need to change the plugin again.

[1] https://github.com/siemens/bt2-ftrace-to-ctf/pull/13

Best regards,
Felix


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