On Wed, Sep 14, 2016 at 5:29 AM, Oliver Grawert <o...@ubuntu.com> wrote:
> hi, > > Tl;dr; > > - managing seeds for ubuntu-core changed from task to meta package > - x86 based ubuntu-core snaps lost multiple megabytes of fat ... > > And here the details: > > With the switch to ubuntu-image and the new gadget handling that comes > along with this, we were now able to drop all bits of bootloaders we > shipped inside the rootfs (bootloader binaries (specifically grub) are > actually shipped inside the gadget now and do not need to be copied > from the rootfs into the boot partition any more like we did in the > past with ubuntu-device-flash). > > While working on dropping grub from ubuntu-core one large problem arose > ... our seeds used tasks instead of a meta package. Since we can not > change the seed itself after a release is out (snappy is based on > xenial) this makes it impossible to actually drop packages ... at the > same time the only way to add new packages is to add very ugly hacks to > livecd-rootfs to import them directly during the rootfs build. > > Since the classic ubuntu has always had similar issues with the above > when doing point releases, it was actually completely switched from > tasks to meta packages (relatively recently) ... i did the same for > ubuntu-core now so that package addition/removal gets easier and to be > in sync with the main distro. > > If you need to add/remove a package in the ubuntu-core snap, please use > the ubuntu-core-meta package now (currently in the snappy-dev/image > PPA, it will be SRUed into xenial-updates proper before GA) > > I am happy to report that thanks to the switch i was also able to drop > about 50 lines of awful hacks from the build system that injected > packages at build time in an undocumented way :) > > Now to the more exciting bits ... > > Dropping all grub bits from the amd64 ubuntu-core snap got us from a > 75.1MB package size down to 66.9MB ... > > Likewise the i386 snap went from 72.1MB down to 64.9MB > > I know that a bunch of people will actually celebrate that massive size > reduction (hey manik :) ). > woot woot ;) a big thank you for cleaning this up. what's causing the difference still between the 2 architectures? /manik
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