Provide appdata-xml metada file

carla.appdata.xml serves for displaying Carla in GNOME Software.
Without the file, GNOME Software does not display Carla.

Carla.spec

@@ -2,7 +2,7 @@
 
 Name:           Carla
 Version:        2.3.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Audio plugin host
 
 # The entire source code is GPLv2+ except
@@ -51,6 +51,7 @@ Epoch:   1
 License:        GPLv2+ and BSD and Boost and ISC and MIT and zlib
 URL:            https://github.com/falkTX/Carla
 Source0:        https://github.com/falkTX/%{name}/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
+Source1:	carla.appdata.xml
 Patch0: Carla-gcc11-include.patch
 
 #ExcludeArch:    ppc64le
@@ -73,6 +74,8 @@ BuildRequires:  pkgconfig(liblo)
 BuildRequires:  pkgconfig(zlib)
 BuildRequires:  desktop-file-utils
 BuildRequires: make
+BuildRequires:  /usr/bin/appstream-util
+BuildRequires:  /usr/bin/desktop-file-validate
 Requires:       python3-qt5
 Requires:       python3-pyliblo
 Requires:       hicolor-icon-theme
@@ -171,8 +174,13 @@ chmod a+x %{buildroot}%{_datadir}/%{pname}/{carla,carla-control,carla-jack-multi
 # fix perm due rpmlint W: unstripped-binary-or-object /usr/lib64/carla/libcarla_interposer-jack-x11.so
 find %{buildroot}%{_libdir} -name '*.so' -exec chmod +x '{}' ';'
 
+# Install appdata file
+mkdir -p %{buildroot}%{_datadir}/metainfo
+install -p -m 0644 %SOURCE1 %{buildroot}%{_datadir}/metainfo
+
 %check
 desktop-file-validate %{buildroot}%{_datadir}/applications/*.desktop
+appstream-util validate-relax --nonet %{buildroot}%{_datadir}/metainfo/%{pname}.appdata.xml
 
 %files
 %doc README.md
@@ -199,6 +207,7 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/*.desktop
 %{_datadir}/icons/hicolor/*/apps/%{pname}*.png
 %{_datadir}/icons/hicolor/*/apps/%{pname}*.svg
 %{_datadir}/mime/packages/%{pname}.xml
+%{_datadir}/metainfo/%{pname}.appdata.xml
 
 %files vst
 %{_libdir}/vst/
@@ -215,6 +224,9 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/*.desktop
 %{_libdir}/pkgconfig/%{pname}-host-plugin.pc
 
 %changelog
+* Wed May 26 2021 Jan Beran <jaberan@redhat.com> - 1:2.3.0-2
+- Add carla.appdata.xml file
+
 * Thu Apr 15 2021 Martin Gansser <martinkg@fedoraproject.org> - 1:2.3.0-1
 - Update to 2.3.0
 

carla.appdata.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>carla.desktop</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPLv2+ and BSD and Boost and ISC and MIT and zlib</project_license>
+  <name>Carla</name>
+  <summary>Audio plugin host</summary>
+
+  <description>
+    <p>
+      Carla is a fully-featured audio plugin host, with support for many audio drivers
+      and plugin formats. It's open source and licensed under the GNU General Public
+      License, version 2 or later. </p>-- test every suffix of the sf whether its prefix is not a LHS of the rule,
+    <p>Features:  </p>
+      <ul>
+        <li>LADSPA, DSSI, LV2 and VST plugin formats</li>
+        <li>SF2/3 and SFZ sound banks</li>
+        <li>Internal audio and midi file player</li>
+        <li>Automation of plugin parameters via MIDI CC</li>
+        <li>Remote control over OSC</li>
+        <li>Rack and Patchbay processing modes, plus Single and Multi-Client if using JACK</li>
+        <li>  Native audio drivers (ALSA, DirectSound, CoreAudio, etc) and JACK</li>
+      </ul>
+    <p>In experimental phase / work in progress: </p>
+      <ul>
+        <li>Export any Carla loadable plugin or sound bank as an LV2 plugin</li>
+        <li>Plugin bridge support (such as running 32bit plugins on a 64bit Carla, or Windows plugins on Linux)</li>
+        <li>Run JACK applications as audio plugins</li>
+        <li>Transport controls, sync with JACK Transport or Ableton Link</li>
+      </ul>
+    <p>
+        Carla is also available as an LV2 plugin for MacOS and Linux, and VST plugin for
+        Linux.
+    </p>
+  </description>
+
+  <url type="homepage">https://kx.studio/Applications:Carla</url>
+</component>