Hello,
I was packaging a new application when I noticed that it installed its
AppData file in `/usr/share/appdata`, instead of `%{metainfodir}`:
`/usr/share/metainfo`. Never noticing the distinction before, I use dnf
and find several other packages installing files there. Interestingly,
the `%{__metainfo_path}` macro do also refer to `/usr/share/appdata`. I
even find out that an app I'm developing in GTK is installing its
AppData file there :P!
The Guidelines itself is ambiguous, it is not a MUST that AppData files
should be installed in `%{metainfodir}`, but it is clearly intended to
be required (the SHOULD referring to the existence of the AppData file,
and not its location):
> If a package contains a GUI application, then it SHOULD install a
|.metainfo.xml| file into |%{_metainfodir}|. Installed |.metainfo.xml|
files MUST follow the AppStream specification page
<https://www.freedesktop.org/software/appstream/docs/chap-Quickstart.html#sect-Quickstart-DesktopApps>.
And I found an old discussion on the mailing list about it [1]. Neal
Gompa is recommending there that the AppData should be installed in
`%{_metainfodir}`. So, shouldn't we clarify the Guidelines to precise
that the AppData file MUST be installed in `%{_metainfodir}` as well as
fixing the packages using the wrong path or should we allow both paths
to coexist?
I don't think that this is an important issue though, since
`appstream-glib` take both paths in account [2].
Ironically, I found some `.metainfo.xml` in `/usr/share/appdata` and
some `.appdata.xml` in `/usr/share/metainfo`.
[1]:
https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/DTWEF524FXOR5MY7VQUDY3K6JLIKNUQM/
[2]:
https://github.com/hughsie/appstream-glib/blob/master/libappstream-builder/plugins/asb-plugin-appdata.c#L31-L35
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