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Debian Packaging

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Revision as of 16:06, 21 December 2018 by imported>Effie Mouzeli (→‎Upload to a component directory)
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Rebuilding a package

Process to simple repackage a debian package and push it to wmf apt repo.

Example: repackage python-libthumbor for debian stretch

1. Login to boron.eqiad.wmnet:

2. As a user run the following to download python-libthumbor's source package:

$ apt-get source libthumbor=1.3.2-0+wmf1

3. We should now have 3 files and 1 directory in our working directory:

 -rw-r--r--  1 user wikidev  15K Jul  6  2016 libthumbor_1.3.2.orig.tar.gz          -> source code of the upstream authors
 -rw-r--r--  1 user wikidev 1.2K Jul  6  2016 libthumbor_1.3.2-0+wmf1.dsc           -> meta file describing which files are around
 -rw-r--r--  1 user wikidev 2.4K Jul  6  2016 libthumbor_1.3.2-0+wmf1.debian.tar.xz -> Debian-specific changes
 drwxr-xr-x  6 user wikidev 4.0K Nov 20 14:11 libthumbor-1.3.2                      -> extracted source package

4. In the libthumbor-1.3.2/debian directory, we may find the following files:

 changelog -> records all changes and defines the version of the package
 compat -> a meta file used for automation of the package build
 control -> defines the binary package names and their relation to other packages (e.g. files needed to build and run the package)
 copyright -> decribes the license and the copyright holders
 docs -> this can be used to declare some files as documentation
 patches -> a directory of code changes done to the original tarball
 rules -> defines the package build process
 source -> a directory defining some details of how the source package is defined
 watch -> a meta file which contains information where to look for new releases (i.e. where to download a newer source)

5. Go to libthumbor-1.3.2:

$ libthumbor-1.3.2
$ dch -i

6. We should see something like the following:

 libthumbor (1.3.2-0+wmf1+stretch1) stretch-wikimedia; urgency=low
  * Rebuild for stretch
 -- Effie Mouzeli <>  Tue, 20 Nov 2018 13:42:24 +0000
 libthumbor (1.3.2-0+wmf1) unstable; urgency=low
  * Initial release. (Closes: #783577)
 -- Gilles Dubuc <>  Thu, 19 May 2016 15:30:16 +0000

7. Add your new version string, make sure it is a higher version than the previous one.

8. Build!

$ DIST=stretch pdebuild   -> (use packages from stretch repo)
$ DIST=stretch-wikimedia pdebuild  -> (include packages from stretch-wikimedia repo)

9. Find the build results:

user@boron:~$ ls  -la /var/cache/pbuilder/result/stretch-amd64/*thum*
-rw-r--r-- 1 user wikidev 5873 Nov 20 14:12 /var/cache/pbuilder/result/stretch-amd64/libthumbor_1.3.2-0+wmf1+stretch1_amd64.buildinfo
-rw-r--r-- 1 user wikidev 1797 Nov 20 14:12 /var/cache/pbuilder/result/stretch-amd64/libthumbor_1.3.2-0+wmf1+stretch1_amd64.changes
-rw-r--r-- 1 user wikidev 2500 Nov 20 14:12 /var/cache/pbuilder/result/stretch-amd64/libthumbor_1.3.2-0+wmf1+stretch1.debian.tar.xz
-rw-r--r-- 1 user wikidev 1260 Nov 20 14:12 /var/cache/pbuilder/result/stretch-amd64/libthumbor_1.3.2-0+wmf1+stretch1.dsc
-rw-r--r-- 1 user wikidev 7862 Nov 20 14:12 /var/cache/pbuilder/result/stretch-amd64/python-libthumbor_1.3.2-0+wmf1+stretch1_all.deb

Download source packages from

If you are looking to build a different version than the one provided by a source package, you can have a look at Debian snapshots. Everything you need will be downloaded for you by pointing dget to the relevant .dsc file:

$ dget

Upload to Wikimedia Repo

1. Login to, create a directory and copy all files from boron

$ ssh
$ mkdir libthumbor; cd libthumbor
$ rsync rsync://boron.eqiad.wmnet/pbuilder-result/stretch-amd64/*thum* .

2. Import!

$ sudo -H bash
$ reprepro -C main include stretch-wikimedia libthumbor_1.3.2-0+stretch+wmf1_amd64.changes

Note: We split the archives sometimes, i.e. we add packages to components instead of main

3. Do not forget to !log uploads in -operations IRC channel !

4. Achievement Unlocked!

Upload to a component directory

Sometimes we build packages for specific purposes thus we don't want them to be available under the main component. To create a new component, you simply need to prepare a patch for puppet/modules/aptrepo/distributions-wikimedia. After the component is available on install* servers, you can upload to it by running:

 $ reprepro -C component/thumbor include stretch-wikimedia libthumbor_1.3.2-0+stretch+wmf1_amd64.changes

Create a Debian patch

Sometimes we might wish to add a fix to the software we are packaging, not included in the original source.

1. Check if your source package is using quilt:

 $ cat debian/source/format
 3.0 (quilt)

2. Make the edits you wish to do for your fix and run the following command:

$ dpkg-source --commit  
Enter the desired patch name: something-with-sense.patch

3. Name your patch and use the spawned editor to make a description, for instance:

Description: add -exact in webp conversion
The -exact option was introduced in webp 0.5, which is only available on Stretch.

python-thumbor-wikimedia (2.2-1+deb9u1) stretch-wikimedia; urgency=low

  * Repackaging for stretch

Author: Effie Mouzeli <>

4. Your patch will be saved under debian/patches/foo.patch. Build it with the usual way:

$ DIST=stretch pdebuild   -> (use packages from stretch repo)
$ DIST=stretch-wikimedia pdebuild  -> (include packages from stretch-wikimedia repo)