font-manager does not appear in gnome-software

[Humphrey van Polanen Petel]

The package "Ubuntu Software" does not have "Font Manager" available for install while "Synaptic" does.
This is bad.

I don't mind having to learn how to deal with either, but PLEASE if both are on offer then keep them synchronized. Alternatively, do away with one of them.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-software 3.20.5-0ubuntu0.16.04.10
ProcVersionSignature: Ubuntu 4.15.0-32.35~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Aug 21 16:46:11 2018
ExecutablePath: /usr/bin/gnome-software
InstallationDate: Installed on 2017-12-13 (250 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Olivier Tilloy (osomon)]

Ubuntu Software uses appstream data to list available applications, as opposed to synaptic which is a plain package management GUI (it doesn't make a distinction between applications and other types of packages).

In Ubuntu 18.04, Font Manager is listed in Ubuntu Software, because the upstream project added appstream data in a recent release (https://github.com/FontManager/master/commit/36e20510955a2ddc34bebbfc7f1db3f0fd6c695e).
The version in 16.04 doesn't have that appstream data, which explains why it doesn't appear in Ubuntu Software.

[Matthias Klumpp (ximion)]

It would be neat though if font-manager fixed at least the issues listed at https://appstream.debian.org/sid/main/issues/font-manager.html with its metadata.

I do actually plan to not have ancient metadata processed anymore at some point in the future (ancient data is really rare in the archive nowadays, even).

[Jeremy Bícha (jbicha)]

Matthias, if you make any changes to be stricter, please ensure it will not affect Ubuntu 16.04 LTS or 18.04 LTS (or Debian Stretch), as long as those releases are still supported.

[Matthias Klumpp (ximion)]

@jbicha: Those changes will *never* affect a released Debian or Ubuntu version, only in-development stuff.
The earliest point I actually would consider making such a change is after the Debian Buster release and at least one release before the next Ubuntu LTS. Also, the amount of packages with issues should be really low at that point, ideally be zero.

And all the things that I might adjust yield at least an AppStream warning-type hint for 2-3 years already, and the old-location one is a Lintian warning too.
So people know about it and there's still plenty of time to adapt :-)