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.

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...

Cheers,

Richard



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