[Bug 1646881] Re: Enable pre-caching of snaps in a classic chroot

[Dimitri John Ledkov]

So one can do this today by:

"""
Populating /var/lib/snapd/cache, with a filename equal to the hex of the sha3 sum of the file
"""

I guess if we really want to implement this, changes are needed to the
snap-tool in the livecd-rootfs.

** Also affects: cloud-images
   Importance: Undecided
       Status: New

** Also affects: livecd-rootfs (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  Enable pre-caching of snaps in a classic chroot

Status in cloud-images:
  New
Status in snapd:
  Incomplete
Status in livecd-rootfs package in Ubuntu:
  New

Bug description:
  We have been asked to pre-cache certain snaps in to images that we
  publish to Certified Public Cloud partners, to (potentially) reduce
  the amount of download required to get started using snaps.

  We build the images using an un-booted chroot, so we would need to be
  able to do this without a running systemd/snapd.

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