[OE-core] [PATCH 1/5] RFC image_types.bbclass: add image size limit for tar image type

[Mikko.Rapeli at bmw.de]

On Thu, Nov 29, 2018 at 02:04:14PM +0000, Richard Purdie wrote:
> On Thu, 2018-11-29 at 14:21 +0200, Mikko Rapeli wrote:
> > If IMAGE_ROOTFS_SIZE_LIMIT is defined in image configuration, then
> > build will fail if for tar image type the uncompressed tar ball size
> > exceeds the value, as reported by 'du -ks'.
> > 
> > This check could be extended to other image types as well.
> > 
> > There already exists a check with IMAGE_ROOTFS_SIZE variable
> > but I could not figure out how to actually use it. It does
> > some quite complex overhead calculations which did not seem
> > to work for me on sumo.
> > 
> > When the image size is exceeded, build fails like this:
> > 
> > ERROR: image-1.0-r0 do_image_tar: Image size 170712 of
> > /home/builder/src/base/build/tmp/work/linux/image/1.0-r0/deploy-
> > image-complete/image.rootfs.tar reported by 'du -ks' is larger than
> > limit IMAGE_ROOTFS_SIZE_LIMIT 170000
> 
> What about IMAGE_ROOTFS_MAXSIZE?
>
> I think IMAGE_ROOTFS_SIZE is about adding extra space to the image, not
> limiting its size...

Yea, forgot to mention that I tried that too but got inconsisten results.
I know it's bad but it was easier for me to add this new test than to figure
out what's wrong with current yocto image size checks. Hence RFC.

-Mikko

> Cheers,
> 
> Richard