Improved build times for snappy images

[Kyle Fazzari]

On 05/18/2016 06:37 AM, Reinhard Pointner wrote:
> Hi all,
> 
> Since I find myself rebuilding over and over trying different things. I
> have noticed a few things that could be improved.

Thanks for the feedback Reinhard!

> 1.
> If I add stage-packages to a part. I have to run `snapcraft clean part`
> first to make the changes stick. Changing the yaml does not
> automatically make snapcraft rebuild the changed parts.

Indeed, this is a known issue and is something we're working on. Bits
and pieces are done already, for example if you change the `stage`
keyword the part is automatically re-staged.

> 2.
> mksquashfs takes a lot longer than I'd expect. For a final release I
> wouldn't mind, but building snaps in rapid succession is not fun if it
> takes 2-3 minutes every time (snap folder: 3355 items, totalling 425.4
> MB) I want to test a small change. Not sure what compression is used,
> but at least for testing I'd prefer something that was super fast / no
> compression.

Some new functionality will be available soon via `snap try`, which will
allow you to try your snap directly out of snapcraft's `snap` directory
rather than having to iterate with `mksquashfs` in the loop.

Keep an eye out for those changes!

--
Kyle Fazzari (kyrofa)
Software Engineer
Canonical Ltd.
kyle at canonical.com

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