Continuing with the articles on metapackaging for Debian/Canaima, here is the last article on the equivs tool.
What was left to do was to create a configuration metapackage that copies desktop configuration files when it is installed and stores those settings in the /etc/skel directory for when a new user is created on the system.
The Ubuntu Forums tutorial explains how to create the metapackage with postinst and prerm files; the problem is that the example files are not found at the links it references.
The idea is to add the radiotray program applet to the gnome desktop for all users. Since the machine normally already has users, the radiotray configuration files have to be copied to each user's home directory; for users created after the metapackage is installed, the system will copy the configuration files found in the /etc/skel/ directory.
The first thing to do is create the control file for equivs metapackaging with the equivs-control command:
$equivs-control canaima-radiotray-confThis file will contain:
Section: misc
Priority: optional
Homepage: http://canaima.softwarelibre.gob.ve
Standards-Version: 3.9.1
Package: canaima-radiotray-conf
Version: 0.1
Maintainer: Ernesto Nadir Crespo Avila <ecrespo@cenditel.gob.ve>
Pre-Depends: radiotray
Depends: ${misc:Depends}
Architecture: all
Copyright: copyright
Changelog: changelog
Files: ./radiotray/radiotray.desktop /etc/skel/.config/autostart/radiotray.desktop
./radiotray/bookmarks.xml /etc/skel/.local/share/radiotray/bookmarks.xml
File: postinst
#!/bin/sh -e
# preinst for main-package-config. Divert some configuration file of main-package.
.
set -e
.
PKG=canaima-radiotray-conf
.
if [ "$1" = configure ] ; then
.
for usuario in /home/*? ; do
.
usuario_min=$(basename $usuario)
.
case $(grep "${usuario_min}:.*:.*:.*:.*:.*:::" /etc/shadow ) in
.
'')
#no se hace nada
;;
.
*)
usuario=${usuario_min}
.
if [ -f /home/${usuario}/.config/autostart/radiotray.desktop ];
.
then
.
cp -r /etc/skel/.config/autostart/radiotray.desktop /home/${usuario}/.config/autostart/radiotray.desktop
.
chown ${usuario}.${usuario} /home/${usuario}/.config/autostart/radiotray.desktop
else
.
mkdir -p /home/${usuario}/.config; chown -R ${usuario}.${usuario} /home/${usuario}/.config
.
mkdir -p /home/${usuario}/.config/autostart; chown -R ${usuario}.${usuario} /home/${usuario}/.config/autostart
.
cp -r /etc/skel/.config/autostart/radiotray.desktop /home/${usuario}/.config/autostart/radiotray.desktop
.
chown ${usuario}.${usuario} /home/${usuario}/.config/autostart/radiotray.desktop
.
fi
.
if [ -f /home/${usuario}/.local/share/radiotray/bookmarks.xml ];
.
then
.
cp -r /etc/skel/.local/share/radiotray/bookmarks.xml /home/${usuario}/.local/share/radiotray/bookmarks.xml
.
chown ${usuario}.${usuario} /home/${usuario}/.local/share/radiotray/bookmarks.xml
.
else
.
mkdir -p /home/${usuario}/.local; chown -R ${usuario}.${usuario} /home/${usuario}/.local
.
mkdir -p /home/${usuario}/.local/share; chown -R ${usuario}.${usuario} /home/${usuario}/.local/share
.
mkdir -p /home/${usuario}/.local/share/radiotray; chown -R ${usuario}.${usuario} /home/${usuario}/.local/share/radiotray
.
cp -r /etc/skel/.local/share/radiotray/bookmarks.xml /home/${usuario}/.local/share/radiotray/bookmarks.xml
.
chown ${usuario}.${usuario} /home/${usuario}/.local/share/radiotray/bookmarks.xml
.
fi
.
esac
.
done
.
fi
.
exit 0
File: prerm
#!/bin/sh -e
.
set -e
.
PKG=canaima-radiotray-conf
.
if [ "$1" = configure ] ; then
.
for usuario in /home/*? ; do
.
usuario_min=$(basename $usuario)
.
case $(grep "${usuario_min}:.*:.*:.*:.*:.*:::" /etc/shadow ) in
.
'')
#no se hace nada
;;
.
*)
usuario=${usuario_min}
.
if [ -f /home/${usuario}/.config/autostart/radiotray.desktop ];
.
then
.
rm -f /home/${usuario}/.config/autostart/radiotray.desktop
.
fi
.
if [ -f /home/${usuario}/.local/share/radiotray/bookmarks.xml ];
.
then
.
rm -f /home/${usuario}/.local/share/radiotray/bookmarks.xml
.
fi
.
esac
.
done
.
fi
.
exit 0
Description: Radiotray bookmarks to Venezuelan radio streaming
Radiotray config to autostart in gnome and radio stream bookmarkThe section and priority of the program are defined, along with the program's site and the policy version to use; the program name, its version, the program maintainer, and the pre-dependency, which in this case is the radiotray program.
The dependency is ${misc:Depends}; this variable is defined because debhelper is used for packaging. The architecture is all, and the copyright and changelog files are defined.
Then the Files option defines the files that will be copied to the /etc/skel/ directory.
The File option defines each script to add to the package, in this case the postinst and prerm files.
What postinst does is find the user accounts on the machine and copy the configuration files into the directories gnome uses to manage settings. In the case of prerm, it deletes those files for each user on the machine.
Finally, a short and then a long description of the program are given.
The changelog file will hold the changes made to the metapackage:
canaima-radiotray-conf (1:0.1) unstable; urgency=low
* First release.
-- Ernesto Nadir Crespo Avila <ecrespo@cenditel.gob.ve> Fri, 23 Dec 2011 10:57:05 -0430
The copyright file will contain the following:
Authors:
Copyright (C) 2011 Ernesto Nadir Crespo Avila <ecrespo@cenditel.gob.ve>
License:
This package is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
This package is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
On Debian GNU/Linux systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-2'.Create the radiotray directory that will hold the configuration files:
$mkdir radiotrayCreate the bookmarks.xml and radiotray.desktop files. The first defines the Internet radio stations you want in your favorites and the second defines that the radiotray program is placed as an applet on the Gnome desktop.
The bookmarks.xml file. The contents of this file are shown in the following figure:
The radiotray.desktop file:
[Desktop Entry]
Type=Application
Exec=radiotray
Hidden=false
X-GNOME-Autostart-enabled=true
Name[es_VE]=radiotray
Name=radiotray
Comment[es_VE]=Cliente de radio por internet
Comment=Cliente de radio por internetEquivs takes the file definition (File) and creates the files for the installation process. The following figure shows the file structure of the DEBIAN directory inside the deb package:
After uploading the metapackage to a repository and installing it, the following figure shows the radio stations that appear in the favorites of radiotray:
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