[Bug 2098630] Re: [RC] Two copies of every snap are shipped

[Michael Hudson-Doyle]

I'm not on a network where downloading a recent desktop ISO makes sense
but I'm pretty sure these are hard links to the same file. I don't know
how to get unsquashfs to show this, but from a random livefs build
artifact I have lying around:

mwhudson at orcrist:~$ sudo mount ~/tmp/seed-in-live-layer/livefs/livecd.ubuntu.minimal.squashfs ~/tmp/mnt/1
mwhudson at orcrist:~$ ls -li ~/tmp/mnt/1/var/lib/snapd/{seed/,}snaps/firefox*.snap
180084 -rw------- 2 root root 288665600 Jan 29 15:33 /home/mwhudson/tmp/mnt/1/var/lib/snapd/seed/snaps/firefox_5647.snap
180084 -rw------- 2 root root 288665600 Jan 29 15:33 /home/mwhudson/tmp/mnt/1/var/lib/snapd/snaps/firefox_5647.snap

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Title:
  [RC] Two copies of every snap are shipped

Status in livecd-rootfs package in Ubuntu:
  New
Status in livecd-rootfs source package in Noble:
  New

Bug description:
  When doing some ISO content checks this cycle for Lubuntu, I noticed
  something strange:

  $ sudo ls -lahR /var/lib/snapd/ | grep "\.snap"
  [...]
  -rw------- 2 root root 4.0K Feb 16 19:24 bare_5.snap
  -rw------- 2 root root  74M Feb 16 19:24 core22_1748.snap
  -rw------- 2 root root 259M Feb 16 19:24 firefox_5751.snap
  -rw------- 2 root root  12M Feb 16 19:24 firmware-updater_167.snap
  -rw------- 2 root root 517M Feb 16 19:24 gnome-42-2204_202.snap
  -rw------- 2 root root  92M Feb 16 19:24 gtk-common-themes_1535.snap
  -rw------- 2 root root  45M Feb 16 19:24 snapd_23545.snap
  -rw------- 2 root root 4.0K Feb 16 19:24 bare_5.snap
  -rw------- 2 root root  74M Feb 16 19:24 core22_1748.snap
  -rw------- 2 root root 259M Feb 16 19:24 firefox_5751.snap
  -rw------- 2 root root  12M Feb 16 19:24 firmware-updater_167.snap
  -rw------- 2 root root 517M Feb 16 19:24 gnome-42-2204_202.snap
  -rw------- 2 root root  92M Feb 16 19:24 gtk-common-themes_1535.snap
  -rw------- 2 root root  45M Feb 16 19:24 snapd_23545.snap

  There are *two* copies of every single snap on the ISO. And they are
  not symbolic links.

  I thought, perhaps this is a consequence of my ISO bootup, perhaps
  snapd likes to put them there for some reason?

  Nope:

  $ sudo unsquashfs -ls /cdrom/casper/minimal.standard.squashfs | grep "\.snap"
  [...]
  squashfs-root/var/lib/snapd/seed/snaps/bare_5.snap
  squashfs-root/var/lib/snapd/seed/snaps/core22_1748.snap
  squashfs-root/var/lib/snapd/seed/snaps/firefox_5751.snap
  squashfs-root/var/lib/snapd/seed/snaps/firmware-updater_167.snap
  squashfs-root/var/lib/snapd/seed/snaps/gnome-42-2204_202.snap
  squashfs-root/var/lib/snapd/seed/snaps/gtk-common-themes_1535.snap
  squashfs-root/var/lib/snapd/seed/snaps/snapd_23545.snap
  squashfs-root/var/lib/snapd/snaps/bare_5.snap
  squashfs-root/var/lib/snapd/snaps/core22_1748.snap
  squashfs-root/var/lib/snapd/snaps/firefox_5751.snap
  squashfs-root/var/lib/snapd/snaps/firmware-updater_167.snap
  squashfs-root/var/lib/snapd/snaps/gnome-42-2204_202.snap
  squashfs-root/var/lib/snapd/snaps/gtk-common-themes_1535.snap
  squashfs-root/var/lib/snapd/snaps/snapd_23545.snap

  This is a release blocker for Lubuntu 25.04 and Lubuntu 24.04.3.
  Whether this is a snapd bug or livecd-rootfs bug, there must only be
  one copy of each snap installed.

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