PyMaemo/Scratchboxless packaging guide

Introduction

The usual way of developing Maemo applications is using or Scratchbox or MADDE, which are quite heavy for Python development. An alternative is using stdeb, a set of extensions to distutils that allows generating debian packages, both binary and source, that can be installed on the device or sent to the extras-devel repository.

This tutorial will show how to integrate it into your project, building the packages and uploading it to extras-devel.

Preparing the package

As stdeb extends distutils, it is necessary that you have a working setup.py script. For our example application, which consists of a single script named "myscript" and support files like .desktop and an icon, the setup.py will look like this: <source lang="python"> from distutils.core import setup

setup(

   name='myscript',
   author='Lauro Moura',
   author_email='lauro.neto@donotspamme.com',
   scripts=['myscript'],
   data_files=[('share/applications/hildon', ['myscript.desktop']),
               ('share/pixmaps', ['myscript.png'])],

) </source> A file named stdeb.cfg in the same directory as setup.py is required, with stdeb maemo-specific options. A detailed list of options can be found in the stdeb website.

[DEFAULT]
XS-Python-Version: 2.5 # Only version currently supported by pymaemo.
Package:myscript # Binary package name. stdeb adds the prefix "python-" by default
Section: user/other # Section should start with user/ to appear in the menu.
Depends: python-gtk2 # add extra dependencies here

Building the packages

The basic command is

python setup.py --command-packages=stdeb.command bdist_deb

It'll create a folder called deb_dist with the source and binary packages. Alternatively, the "sdist_dsc" command will create only the source package.

After generating, you can copy the package to your device and install it (requires an SSH server):

$ scp myscript_0.0.0_all.deb root@n900 ip>:/root
$ ssh root@<n900 ip>
# dpkg -i myscript_0.0.0_all.deb

Building a basic debian directory

Another useful command is debianize. It will read the configuration file and write a directory named debian in the same directory. This can be used for manually creating the packages using dpkg tools directly.

Note: sdist_dsc and bdist_deb do not use this directory, generating a new one in the source dir under deb_dist/.

Uploading to extras

To upload to extras, use the debianize command and then call dpkg-buildpackage:

$ dpkg-buildpackage -rfakeroot -uc -us -S

This command will create the .dsc, .tar.gz and .changes files that can be used to upload the application to extras-devel

Future work

Support for non-debian systems.