View source for Building LinuxMCE 1204

[[Category: Building]]
[[category: programmer's Guide]]
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{{versioninfo|1204Status=relevant|1204UpdatedDate=2 October 2014|1204UpdatedBy=phenigma}}
The following steps explain how to install a development environment onto your core in a chroot environment, so that your running core and its database are not affected. Alternatively, you could build on a separate machine or virtual machine with a clean Kubuntu install. There are notes to this effect at the end of the page.

==Setting up a chroot environment==
Start with becoming root on your core (or standalone builder). The  following steps will need to be done using super user privileges.
  sudo su -

===Create the environment===
Note: these steps must be performed only once, if you are creating a chroot environment to build in (recommended)
 apt-get install debootstrap
 debootstrap --arch i386 precise /opt/builder-ubuntu-precise-i386/

====Mount required directories====
Note: these steps must be performed after each reboot (or put in /etc/fstab of the root machine), if you are using a chroot environment
 mount --bind /dev /opt/builder-ubuntu-precise-i386/dev
 mount none /opt/builder-ubuntu-precise-i386/proc -t proc
 mount none /opt/builder-ubuntu-precise-i386/dev/pts -t devpts

====Change-root into the environment====
Note: these steps must be performed after each reboot to access to build environment (if in a chroot)
 chroot /opt/builder-ubuntu-precise-i386

===Verify apt's list of repositories===
Make sure ''/etc/apt/sources.list'' (inside the chroot) contains something very similar to:
 deb     <nowiki>http://</nowiki>''archive.ubuntu.com''/ubuntu/ precise  main restricted universe multiverse
 deb-src <nowiki>http://</nowiki>''archive.ubuntu.com''/ubuntu/ precise main restricted universe
 deb     <nowiki>http://</nowiki>''archive.ubuntu.com''/ubuntu/ precise -updates  main restricted universe multiverse
 deb-src <nowiki>http://</nowiki>''archive.ubuntu.com''/ubuntu/ precise-updates  main restricted universe
 deb     <nowiki>http://</nowiki>security.ubuntu.com/ubuntu precise-security  main restricted universe
 deb-src <nowiki>http://</nowiki>security.ubuntu.com/ubuntu precise-security  main restricted universe
 deb     <nowiki>http://www.e-tobi.net/vdr-experimental/ sid base</nowiki>
 deb     <nowiki>http://deb.linuxmce.org/ubuntu/ precise main</nowiki>

Add the e-tobi.net GPG key
 gpg --keyserver pgp.mit.edu --recv-keys F7180D26AEDAA642
 gpg --export --armor F7180D26AEDAA642 | sudo apt-key add -

===Installing needed packages===
'''Important!''' Perform these also '''after''' chrooting if you are building in a chrooted environment.

If you get messages like ''/usr/bin/locale: Cannot set LC_MESSAGES to default locale: No such file or directory'', that meens that $LANG is set. Either clear the LANG or install the needed language pack (english given example given in the code-snip below).

(Leave the root password for MySQL empty.)
 apt-get update
 
 #  Uncomment either of lines below if needed (see explanation above)
 #unset LANG
 #apt-get install language-pack-en-base
 
 apt-get dist-upgrade
 apt-get install aptitude openssh-client mysql-server

====Reconfigure MySQL to not open a TCP-IP network port====
(only needed if you are building in a chrooted environment)
 <nowiki>sed 's/^[^#]*bind-address[[:space:]]*=.*$/#&\nskip-networking/' -i /etc/mysql/my.cnf</nowiki>

====Start MySQL Server====
Do not execute the mysql start before doing the sed statement listed above.
 /etc/init.d/mysql start

==Building from source==
For a more in detail description of all the steps involved see [[Building LinuxMCE 0804]]

Currently the focus is on getting the following to work completely.

===Getting started===
You should only have to do this part once initially.

====Obtaining the build scripts====
 apt-get install subversion
 svn co http://svn.linuxmce.org/svn/trunk/src/Ubuntu_Helpers_NoHardcode

====Installing the build scripts====
 cd Ubuntu_Helpers_NoHardcode
 ./install.sh

====Configuring the build scripts====
 cat >/etc/lmce-build/builder.custom.conf <<EOF
 
 # Avoid DVD build step[s]
 do_not_build_sl_dvd="yes"
 do_not_build_dl_dvd="yes"
 
 
 # Create fake win32 binaries
 win32_create_fake="yes"
 
 # Point to the development sqlCVS server for 0810
 sqlcvs_host="schema.linuxmce.org"
 EOF

===Preparing for build===

 cd /usr/local/lmce-build

The preparation steps one at a time (recommended):
 prepare-scripts/install-build-pkgs.sh
 #prepare-scripts/cd1-prepare.sh
 #prepare-scripts/cd2-prepare.sh
 prepare-scripts/create-diskless-debootstrap.sh
 prepare-scripts/import-external-files.sh
 prepare-scripts/preseed-build-pkgs.sh

Or, you could do them all in one go with:
 ./prepare.sh

===Building from source===

All the build steps can be executed seperately (recommended at least the first time):
 build-scripts/checkout-svn.sh
 build-scripts/import-win32bins.sh
 build-scripts/build-replacements.sh
 build-scripts/build-makerelease.sh
 build-scripts/import-databases.sh
 build-scripts/build-maindebs.sh
 build-scripts/get-closed-source-debs.sh
 build-scripts/create-repo.sh
 #build-scripts/cd1-build.sh
 #build-scripts/cd2-build.sh

Or the following script will run them all:
 ./build.sh

== Using the build's output ==
The build.sh script puts all created deb-files under /var/www. Setup a web server to point to that directory. 
 sudo apt-get install apache2

In the machine, where you want to test the build, follow the instructions on using the alpha build. After the step pre-install-from-repo.sh, go into /etc/apt/sources.list, and replace the deb.linuxmce.org line with
 deb <ip-address-of-your-builder> ./
and re-run apt-get update

== Notes ==
If you want to speed up building on a multi-core machine, create (or append) /etc/lmce-build/builder.custom.conf and add a line such as:
 NUMJOBS=4
to build using 4 threads.  Adjust for you cpu core # +1 for optimal build efficiency.

=== Without -j 2 ===
 23:36:44  Compiling and building packages
 01:42:50  *** STEP: Download closed source debs

 Total: roughly 2h 6minutes for compiling

=== With -j 2 ===
 13:13:44  Compiling and building packages
 14:51:56  *** STEP: Download closed source debs

 Total: roughly 1h 38minutes for compiling

=== Notes for installing on a virgin Kubuntu 8.10 installation (no chroot) ===
* There is no need to run the command below, IF you are not chroot'ing, but it also doesn't hurt unless you expect to access the db from an external system.
  sed 's/^[^#]*bind-address[[:space:]]*=.*$/#&\nskip-networking/' -i /etc/mysql/my.cnf

* After you reboot, you will notice that KDE mysteriously vanished, and you will go to a gnome desktop.  I'm not sure why this is, but it does not seem to affect the builder any. -- is this still the case???  <phenigma>

* If you want to run this builder headless (or just want to ability to ssh in to it), then you must configure it for ssh access by installing an ssh server
 sudo apt-get install openssh-server