On Mon, Dec 23, 2013 at 11:36 AM, Richard Purdie <
[email protected]> wrote:

> On Mon, 2013-12-23 at 11:11 +0000, Barros Pena, Belen wrote:
> > In the early days of the Toaster project, Yocto Project users we spoke
> > wanted a way to narrow down which variables could be the source of a
> build
> > failure. For example, if my latest build failed, but the previous one
> > completed successfully, it is reasonable to assume that the cause of the
> > failure is in some variable I've changed.
> >
> > To cater for this need, we added a 'changed' field to our db variables
> > table, but we haven't worked out what 'changed' really means or how to
> > collect the data.
> >
> > Users brought up 2 possible meanings of 'changed':
> >
> >
> > 1. Changed from the Yocto Project default value (the value the variable
> > has when you download / clone a stable release of the Yocto Project)
> > 2. Changed since the last build
> >
> > Is it possible to collect any of the 2?
>
> Changes in variables is effectively what we've been talking about when
> we've talked about sstate signature differences and how to visualise
> those, its effectively what diffsigs is about.
>
> I'm not sure a simple column is going to do this justice.
>

Actually, a single column doesn't help, especially when we have no idea
what it actually means.


>
> In this case I think you're talking just about the base metadata and not
> the task level variables though which I guess would simplify things a
> bit...
>

Yep, this is about base metadata. We can show the a single variable value
across a number of builds,
or do base metadata diff between two builds, if that helps.

We are not tracking task level variables, not sure if this is a problem or
not.


>
> Cheers,
>
> Richard
>
>
>
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>



-- 
Alex Damian
Yocto Project
SSG / OTC
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