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Development Team/Jhbuild

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Revision as of 09:47, 20 June 2010 by Sascha silbe (talk | contribs) (you don't need sugar-jhbuild to run sugar-emulator or use VNC)
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Sugar-jhbuild will automatically download the latest of Sugar's dependencies as well as Sugar itself directly from their source repositories, rather than relying on source packages that may have become stale. Below are generic instructions on how to use jhbuild to get up and running with Sugar.

Compatible platforms

Jhbuild is quite demanding with regard to the packages and setup for the host Linux distribution. As a result there are only a few Linux distributions which are known to work with it.

See the distribution-specific instructions for information about whether your distribution is currently supported. Other distros which have a recent-enough release (e.g. including the latest stable GNOME release) can be supported if someone is willing to maintain the dependencies for that distro release (in config/sysdeps).

Check distro-specific instructions

Many distributions have some quirks that need to be catered for and there are different package managing tools in use, so please check the page for your distribution before proceeding:

Distro packaging guidelines vary, so please don't worry if jhbuild requires twice/half the packages in one distro that it did an another.

Some general advice

Note: Like most other Unix applications, sugar-jhbuild should never be run as root. It may easily screw up your whole system and/or break in unexpected ways if you do. If you get any permissions error, there's something wrong with your installation that should be fixed.

If you're stuck or if you get strange errors, feel free to ask for help on the #sugar IRC channel or the sugar-devel mailing list. Don't waste too much time chasing strange problems: usually it's caused by some basic, easy to fix problem. You might also want to check the bug tracker to see if it's a known issue.


Prerequisites

python
The sugar-jhbuild command is a Python script, so you need the Python interpreter.
git
To get the source code of sugar-jhbuild itself and many other Sugar packages you need the git command-line tool from the distributed version control system of the same name. In many distributions the minimal package you need to install is "git-core".
svn
A few packages (as of January 2010, only squeak and part of etoys) do not use git, and you need the svn command-line tool from the Subversion version control system to get their source code.

These should be enough to run sugar-jhbuild itself on a typical Linux installation. Running sugar-jhbuild depscheck (see below) will probably list dozens of additional required packages.

Check out sugar-jhbuild

In a suitable directory (i.e. usually your user's home directory i.e. /home/yourusername/~), execute 

git clone git://git.sugarlabs.org/sugar-jhbuild/mainline.git sugar-jhbuild
Make sure you are in the _user's_ home directory
video http://www.youtube.com/watch?v=Tdr1bs4rQ_s

You'll know if it worked if you get something like this: 

localhost ~]$ git clone git://git.sugarlabs.org/sugar-jhbuild/mainline.git sugar-jhbuild
Initialized empty Git repository in /home/denny/sugar-jhbuild/.git/
remote: Counting objects: 4688, done.
remote: Compressing objects: 100% (1998/1998), done.
remote: Total 4688 (delta 2759), reused 4488 (delta 2638)
Receiving objects: 100% (4688/4688), 1.86 MiB | 197 KiB/s, done.
Resolving deltas: 100% (2759/2759), done.

Build sugar base system and its dependencies

Go into the directory you created and start the build. It takes about 30 minutes on a 1.6ghz machine with a wireless G connection. 

cd sugar-jhbuild
./sugar-jhbuild update
./sugar-jhbuild depscheck
./sugar-jhbuild build
Here are videos of the process.

And now run it. 

./sugar-jhbuild run sugar-emulator

If it doesn't run or you have other problems read on.

Dealing with dependencies

sugar-jhbuild depscheck will print a list of required packages. They are part of the distribution you're using and should be installed using your favourite package manager (e.g. aptitude/synaptic for Debian, yum for Fedora).

If you notice that there's a package missing from the ./sugar-jhbuild depscheck output (i.e. it's required for Sugar to work properly and not installed, but depscheck does not mention it), please file a bug report (login required first, but currently no automatic redirection to login page) against the sugar-jhbuild Component in the Sugar Labs bug tracker.

Some tips

A useful sequence of commands for building Sugar, from the Sugar mailing list: (Note that build without -n will update first anyway, so run update separately if you want to see what changed more easily.) 

./sugar-jhbuild update
./sugar-jhbuild build -n -a --clean
./sugar-jhbuild run sugar-emulator

The use of -a and --clean flags are needed when a file is removed so that autogen.sh is run. Note: Some packages, e.g., squeak and etoys, don't have a make clean. Just ignore the error.

known issue with hulahop

Question. How do you run autoconf to fix this problem?
when you get asked because of the error, choose the configure stage, or add "-a" to the build / buildone commands

If build breaks after an update

The packages in sugar-jhbuild are the latest development versions, so you not only get the latest features, but also the latest breakages. The dependencies may change often, too, so be sure to run 

./sugar-jhbuild depscheck

regularly and install the missing packages.

If your problem persists for more than a day (and even though you installed all missing packages), please file a bug report.

Run Sugar

This command launches Sugar in a nested X session: 

./sugar-jhbuild run sugar-emulator

To exit the emulator, press Alt-Q.

To set debug variables, modify ~/.sugar/debug (this file will be created on first run of Sugar).

Note that due to a bug in Xephyr your keyboard might not work as expected. A partial workaround is to run setxkbmap <keymap name> by adding this command line to ~/.sugar/debug. Most "regular" keys should work fine after that, some "special keys" (e.g. cursor up/down) might still refuse to operate as intended.

The "keymap name" usually is a two letter country code, e.g. "de" for german or "fr" for french.

Running multiple instances

To run an additional instance of sugar, you can start the second instance in the following way: 

SUGAR_PROFILE=2 ./sugar-jhbuild run sugar-emulator

This will create a new profile in ~/.sugar/, i.e. ~/.sugar/2/. You will find logs and configuration for this instance here. The default profile is ~/.sugar/default/

Run an individual activity

Within sugar, e.g. in Terminal, this command launches an individual activity for testing: 

sugar-launch bundle_name

You will see debug output appearing in Terminal.

Configure the mode and resolution of Sugar

You can make Sugar run fullscreen or specify a size (in pixels): 

./sugar-jhbuild run sugar-emulator --fullscreen
./sugar-jhbuild run sugar-emulator --dimensions 1200x900

The default size of 800x600 is currently the minimum that should work without issues. I.e. activities should be tested to work in this mode (and in others as well).

Running sugar in a VNC session

Many users and developers have reported problems with running sugar-emulator, which uses Xephyr. As an alternatice, you can run sugar inside a VNC session. To accomplish this, install a complete set of VNC packages (both server and client) and create a ~/.vnc/xstartup file containing the code below: 

#!/bin/sh
exec ~/sugar-jhbuild/sugar-jhbuild run dbus-launch --exit-with-session sugar

Now, you may run Sugar by creating a VNC session and accessing it using a VNC viewer. E.g.: 

vncserver :1
vncviewer :1

Other commands

JHBuild has several other commands that can be useful for development. You can get an overview with: 

./sugar-jhbuild --help-commands

From within Sugar

Once you have Sugar running, here are some useful commands:

  • Alt+Shift+F makes the frame appear and disappear
  • Ctrl-Q quits an activity
  • Alt+Shift+Q quits Sugar
  • Alt+Shift+O opens the search
  • Alt+Shift+R rotates the screen

Customize

To customize the build you can modify the configuration file named sugar.jhbuildrc or create a copy of it and pass --file /path/to/your/new/config to sugar-jhbuild.

Write access to the repositories

If you have write access to the repositories you can add this (if your login name happens to be marco): 

repos['gnome.org'] = ':ext:marco@cvs.gnome.org:/cvs/gnome'
repos['mozilla.org'] = ':ext:marco%gnome.org@cvs.mozilla.org:/cvsroot'
repos['dev.laptop.org'] = 'git+ssh://marco@dev.laptop.org/git/'
repos['dev.laptop.org/projects'] = 'git+ssh://marco@dev.laptop.org/git/projects/'

Compiling using 2 or more CPU cores

Before running ./sugar-jhbuild build, append this to sugar.jhbuildrc: 

os.environ["MAKEFLAGS"] = "-j4 -l4"

Adjust the numbers to be twice the number of CPU cores in your machine.

Using ccache to speed up rebuilds

To speed up full rebuilds of sugar-jhbuild (i.e. running ./sugar-jhbuild build after removing the source directory) you can use ccache. Install it and append the following to sugar.jhbuildrc: 

os.environ["CCACHE_DIR"] = os.path.join(os.path.dirname(__file__), "ccache")
os.environ["PATH"] = "/usr/lib/ccache:"+os.environ["PATH"]

Adjust /usr/lib/ccache to the path used by your distribution and create the ccache directory (inside your sugar-jhbuild checkout).

Building specific version of Sugar

To build a specific version of Sugar do the following:

  • Open sugar.jhbuildrc and find line:
modulesets = 'sugar'
  • Set this to:
modulesets = 'sugar-0.86'

customizing the latter to your specific needs.

  • Copy sugar.jhbuildrc to ~/.jhbuildrc
  • ./sugar-jhbuild

Suggestions

  • Copy all your sugar-jhbuild to sugar-jhbuild-0.84 (for example) or check the repositories out again.
  • rm -r install source/
  • If you want to keep the source directory to save bandwidth, you need to be extra careful: delete all unpacked tarballs and cleanup all git repositories with git clean -d -a.
  • Don't forget to delete or modify .jhbuildrc after building the specific version of Sugar if you still want to receive the latest updates from the repositories, OR
  • Create another user.

Useful Internal Links

External links

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