Cellular Network Infrastructure

h1. OBS Maintenance

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The Osmocom [[binary packages]] are built with OBS, the "openSUSE build service":https://build.opensuse.org/project/show/network:osmocom. In order to do that, the jenkins jobs "Osmocom_OBS_latest":https://jenkins.osmocom.org/jenkins/job/Osmocom_OBS_latest/ / "_nightly":https://jenkins.osmocom.org/jenkins/job/Osmocom_OBS_nightly/ ("config":https://git.osmocom.org/osmo-ci/tree/jobs/osmocom-obs.yml) checkout the source repositories and build debian *source* packages, then upload these to OBS.

h2. Install osc

Get the command-line client for managing OBS. When using for the first time, it will ask for the credentials.

<pre>

$ sudo apt install osc

$ osc ls

</pre>

h2. Rebuilding network:osmocom:next

"network:osmocom:next":https://build.opensuse.org/project/show/network:osmocom:next is for a mix of packages built from master, and from experimental branches. Which branches are built is defined in "osmocom-nightly-packages.sh":https://git.osmocom.org/osmo-ci/tree/scripts/osmocom-nightly-packages.sh?h=obs-next of the obs-next branch in osmo-ci.git, next to the "checkout" lines. The "git log":https://git.osmocom.org/osmo-ci/log/scripts/osmocom-nightly-packages.sh?h=obs-next should give a clear overview of the changes. As only the branches and the PROJ variable are changed, it should be easy to rebase this on master as needed.

The package repository is built manually by clicking "Build with Parameters" at "Osmocom_OBS_nightly":https://jenkins.osmocom.org/jenkins/job/Osmocom_OBS_nightly and tying in "obs-next" as branch.

h2. Workflow for testing OBS configurations

OBS has a "project configuration":https://en.opensuse.org/openSUSE:Build_Service_prjconf, which may need to be adjusted to state preferred dependencies for example. Before we apply project configurations to the official Osmocom OBS projects, we can test them in our own OBS project. Copy the relevant package first (adjust the username accordingly in all following examples):

<pre>

$ osc copypac network:osmocom:nightly osmo-gsm-manuals home:osmith42

</pre>

Visit the site in your browser:

* https://build.opensuse.org/package/show/home:osmith42/osmo-gsm-manuals

Set up build targets:

* https://build.opensuse.org/project/add_repository_from_default_list/home:osmith42

The package should get added to the queue already.

Open your project config next to the osmocom:nightly one:

* https://build.opensuse.org/project/prjconf/home:osmith42

* https://build.opensuse.org/project/prjconf/network:osmocom:nightly

First copy everything from the Osmocom project over to your own project. Then make changes to your config, until the builds are working as expected (dependency problems are resolved etc.). Whenever you change the config, OBS will immediately re-evaluate the build dependencies, no need to upload the source packages again.

When everything works as expected, copy the config changes you have made to the Osmocom project (nightly and latest).

Note that changing network:osmocom's project config did not seem to have any effect. It seems that we really must change both network:osmocom:nightly and :latest instead.

h2. Workflow for modifying packages

h3. (Optional) modify the debian dir

* clone the source git repository

* make changes to the debian dir

* commit your changes

* push to a "user/..." branch

h3. Build source packages and upload to your own OBS project

* clone osmo-ci.git

* open "osmo-nightly-packages.sh":https://git.osmocom.org/osmo-ci/tree/scripts/osmocom-nightly-packages.sh

* if you intend to make changes to the script, do them and commit the changes

* change "PROJ":https://git.osmocom.org/osmo-ci/tree/scripts/osmocom-nightly-packages.sh?id=dc5fc51c1fa76e64db774ecb9e71fc25ad6c46cd#n10 to home:USERNAME

* if you made changes to the debian dir, insert your branch name after the related "checkout line":https://git.osmocom.org/osmo-ci/tree/scripts/osmocom-nightly-packages.sh?id=dc5fc51c1fa76e64db774ecb9e71fc25ad6c46cd#n172 (e.g. <code>checkout osmo-gsm-manuals osmith/some-random-change</code>)

* run osmocom-nightly-packages.sh

* check in your browser if all packages have been built by OBS as expected (iterate until you get everything right)

When everything works fine, contribute your patches with [[Gerrit]] as usually.

h2. Troubleshooting

h3. Debian dir doesn't work for multiple debian versions

Following what has been done for osmo-trx:

* create the debian dir to work with the latest debian stable

* create a patch that would make it work with an earlier release (debian 8) and save it as debian/patches/build-for-debian8.patch

* adjust the osmocom-*-packages.sh scripts to upload a second debian source package, which has the patch applied

* configure OBS to build the patched package only for the older debian releases, and the unpatched package only for the stable release

h3. Package is not resolvable

<pre>

have choice for jadetex needed by docbook-utils: jadetex texlive-formats-extra

</pre>

You'll need to adjust the OBS project configuration (mind the testing workflow above):

<pre>

Prefer: texlive-htmlxml

</pre>

h2. See also

* https://en.opensuse.org/Portal:Build_Service

* https://en.opensuse.org/openSUSE:Build_Service_prjconf