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Sugar ought to be easy to run from chroots. For a variety of silly reasons, this isn't yet the case, but it might be soon. Ping [[User:Mstone|Michael]] with questions.
=== Status ===


=== Chroot Construction ===
* sugar-chroot-0.1 released: see [http://dev.laptop.org/git/users/mstone/sugar-chroot sugar-chroot]


There are lots of ways to create appropriate chroots; e.g. by hand, with debootstrap, with mock, etc.
=== Purpose ===


Here are some ideas to help you get started:
''You want to hack sugar. You don't want to fuss around. '''You want sugar-chroot.'''''


==== Ubuntu jaunty chroot ====
=== Usage ===
With ''recent'' versions of debootstrap, in order to get a working chroot, you want something like:


export CHROOT=`pwd`/jaunty-root
As excerpted from the '''[http://dev.laptop.org/git/users/mstone/sugar-chroot/plain/README README]''':
sudo debootstrap --arch i386 jaunty $CHROOT http://ubuntu.media.mit.edu/ubuntu/
sudo chroot $CHROOT /bin/bash -l
mount -t proc proc /proc
mount -t devpts devpts /dev/pts


==== Debian sid chroot ====
sugar-chroot consists of simple scripts. Download and unpack them like so:
With debootstrap, in order to get a working chroot, you want something like:  


  export CHROOT=`pwd`/sid-root
  NV=sugar-chroot-0.1
  sudo debootstrap --arch i386 sid $CHROOT http://debian.lcs.mit.edu/debian
  curl http://dev.laptop.org/~mstone/releases/SOURCES/$NV.tar.xz | tar Zxf $NV.tar.xz
sudo chroot $CHROOT /bin/bash -l
  cd $NV
# and some of the following:
mount -t proc proc $CHROOT/proc
mount -t devpts devpts $CHROOT/dev/pts
  mount -t selinuxfs selinux $CHROOT/selinux


''Reference: http://www.debian.org/doc/manuals/reference/ch-tips.en.html ''
To use them, pick a supported distro:


==== Fedora rawhide chroot ====
DISTRO=debian
With mock, it would be more like:
DISTRO=fedora


mock -r fedora-devel-i386 --init
To configure:
mock -r fedora-devel-i386 --shell


=== Sugar Installation ===
echo $DISTRO > conf/distro
$EDITOR conf/$DISTRO.mk


==== jaunty chroot ====
Then run


  sed -ie "s/main/main universe/" /etc/apt/sources.list
  sudo make r/distro
apt-get update
apt-get install sugar sugar-activities
# install your development tools here


=== X11 ===
to install your chroot.


We need to point Sugar at an X server. One easy (but insecure) way to do this is to make a nested X server like so, ''outside the chroot'':
=== History ===


Xephyr -ac :1
See http://wiki.sugarlabs.org/index.php?title=Development_Team/Chroot&oldid=36911 for the manual instructions which sugar-chroot automates.
 
See the talk page for more secure alternatives.
 
=== D-Bus ===
 
Sugar wants to be able to use global state stored in both HAL and NetworkManager, both of which live on the system bus. Consequently, ''outside the chroot'', we need to
 
  sudo mount --bind /var/run/dbus $CHROOT/var/run/dbus
 
before entering the chroot. (Mock uses unshare() to enter a new mount-point namespace since this makes garbage collection of mountpoints much easier.)
 
=== User Account ===
 
For stupid reasons, it's necessary that Sugar run under a uid inside the chroot which exists as a real account outside the chroot. (Talk to the DBus people.)
 
Consequently, run something like this ''both'' inside and outside the chroot:
 
  groupadd -g 64002 sugar
  useradd -m -u 64002 -g sugar -s /bin/bash sugar
 
Then, inside the chroot, you can happily run sugar as user 'sugar' with something like
 
  su sugar -
  export DISPLAY=:1
  export DBUS_SESSION_BUS_ADDRESS=$(dbus-daemon --session --print-address --fork)
  sugar

Latest revision as of 21:33, 23 February 2010

Status

Purpose

You want to hack sugar. You don't want to fuss around. You want sugar-chroot.

Usage

As excerpted from the README:

sugar-chroot consists of simple scripts. Download and unpack them like so: 

NV=sugar-chroot-0.1
curl http://dev.laptop.org/~mstone/releases/SOURCES/$NV.tar.xz | tar Zxf $NV.tar.xz
cd $NV

To use them, pick a supported distro: 

DISTRO=debian
DISTRO=fedora

To configure: 

echo $DISTRO > conf/distro
$EDITOR conf/$DISTRO.mk

Then run 

sudo make r/distro

to install your chroot.

History

See http://wiki.sugarlabs.org/index.php?title=Development_Team/Chroot&oldid=36911 for the manual instructions which sugar-chroot automates.

Retrieved from "https://wiki.sugarlabs.org/index.php?title=Development_Team/Chroot&oldid=46703"