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stuarta 13:35, 3 March 2014 (UTC)

MythTV uses an extensive set of buildslaves, running different operating systems, different versions of Qt (Qt4 & Qt5) as well as different compilers. The aim of this is to validate all changesets do not affect our ability to build on the different platforms.

The intention is to ensure that MythTV will build and run on all the current distro flavours, and in particular on the long term stable variants. eg.

Debian Stable
Ubuntu LTS
Fedora
RHEL/Centos6 is not an option due to the Qt version being too old.

Build Master

You can look at the progress of current builds or the history of the most recent builds by visiting BuildMaster. I'd recommend either the waterfall or console pages.

Setting up a build slave

Setting up a build slave is a relatively simple process. If you have a server capable of running a virtual machine or three, then offers of buildslaves are always welcome. Please contact the developers via IRC #mythtv on freenode.

Basic VM configuration

1x CPU
2Gb RAM
8Gb OS Disk
50Gb /home

Notes:

2GB of RAM is required as tv_rec.cpp can take an extremely long time to build and/or timeout the build when running only 1Gb ram
50Gb /home is sufficient to hold at least 3 different builds as well as the whole 10Gb ccache

Installation

Install the operating system you are planning to use, along with all the required packages. Here are a few recipies for setting up buildslaves

You should also create a buildslave user, and configure ccache to be allowed to use 10Gb of cache ccache -M 10G

Connecting to the build network

For this you will need to talk to the developers on IRC again. You should create a passwordless ssh key for your buildslave user, this will need to be added to allow the builder to checkout the code from our git repository.

You will be provided with the following pieces of information

your buildslave's name
the password assigned to your buildslave
the hostname and port number of the buildmaster, i.e. buildbot.example.org:8007

Create the buildslave

run the 'buildslave' command as follows

  buildslave create-slave BASEDIR MASTERHOST:PORT SLAVENAME PASSWORD

I suggest using mythtv as your BASEDIR. Please make sure you edit info/host and info/admin in your BASEDIR so we know some information about your buildslave and your contact details

Then a build can be forced by talking to MythBuild on irc in #mythtv-commits

  MythBuild: force build <buildslave_name> <message>

Autostart on boot

Configuring the buildslave to autostart on system boot is a very simple step. Create a script ~/bin/start-buildslave.sh with the following contents

  #!/bin/bash
  cd ~/mythtv
  /usr/bin/buildslave stop
  exec /usr/bin/buildslave start

Notes:

The stop is not a mistake. The stop causes the buildslave to cleanup any old PID files that are present which would otherwise prohibit the buildslave from starting

Then chmod +x ~/bin/start-buildslave.sh.

Next edit crontab to start it at boot time. As the buildslave user run crontab -e and add the following line

 @reboot /home/buildslave/bin/start-buildslave.sh

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