Comment 6 for bug 1815761

Verified by running echo TEST1815761 as the hook, across all releases with their SRU versions (as shown in the log below).

$ lxc exec apt-cosmic -- apt upgrade apt -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.7.3).
apt set to manually installed.
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-bionic -- apt upgrade apt -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.6.9).
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-xenial -- apt upgrade apt -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
apt is already the newest version (1.2.30).
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-trusty -- apt upgrade apt -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
apt is already the newest version.
The following packages were automatically installed and are no longer required:
  libfreetype6 os-prober
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
TEST1815761

$ lxc exec apt-trusty -- apt-cache policy apt #apt upgrade apt -tnow -o APT::Install::Post-Invoke-Success::="/bin/echo TEST1815761"
apt:
  Installed: 1.0.1ubuntu2.21
  Candidate: 1.0.1ubuntu2.21
  Version table:
 *** 1.0.1ubuntu2.21 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64 Packages
        100 /var/lib/dpkg/status