Sugar on a Stick/Sugar Clone

Sugar Clone is, at this point in time (April 2010), a Bash script that aids in the copying of a customized LiveOS image, such as Sugar on a Stick, to a secondary device. It works from within a booted LiveOS image to copy that image. Or it may be used to copy a LiveOS image between 2 attached USB/SD storage devices. It is intended to support the Sugar customization kit projects.

http://people.sugarlabs.org/fgrose/SugarClone

See this announcement post,

You scream, I scream, we all scream for Mirabelle ice cream in a Sugar Clone

.

Introduction

• See the embedded help documentation in the script displayed below.

Test Usage

Test Usage:

1. Obtain the SugarClone script at http://people.sugarlabs.org/fgrose/SugarClone.
2. Before booting the SoaS device that will be the source of the new SugarClone, copy the SugarClone script to the root '/' folder at the base of the filesystem (not the /root folder).
3. Boot the USB stick into SoaS and insert a second USB device into the computer running that SoaS image.
4. In the Terminal Activity of that running SoaS image, enter the command,

/mnt/live/SugarClone

If there is more than one USB/SD storage device available, a menu of the devices will appear for selection of the target device.

The scripts will copy the currently running image to the target device. When that device is booted, a new, Sugar Learner sign-in will be triggered. The previously customized Journal and operating system will be present on the SugarClone image.

On a running LiveOS image, the root folder of the USB/SD device is available at the /mnt/live mount point. The SugarClone script could be obtained (assuming Internet connectivity) as follows:

In the Terminal Activity, change the working directory, get the files, & make them executable:

cd /mnt/live

wget http://people.sugarlabs.org/fgrose/SugarClone

chmod +x SugarClone

At this point,

SugarClone

will launch the script.

Possible Use Cases

Curriculum packaging

1. A teacher wants to prepare a SoaS image with a custom set of installed Activity bundles or a Journal of Activity instances for an upcoming class term.
2. The teacher modifies their current working image by adding or deleting Activity bundles from their Home view and adding or removing Journal entries with specific content, even saving distributable ebooks, or bookmarks in Browse instances that are named for specific sets of local web destinations (a class portal perhaps for deployments lacking Internet connectivity).
3. The teacher scrubs out any personal passwords or other history that should not be shared in the new copies.
4. Following customization, a fresh or recycled USB stick that is inserted into the computer running the customized SoaS image can become the SugarClone.

Step 4 assumes that Usage step 1 has been performed either directly or by the SoaS packagers.

Full image backup or sharing

1. A Learner has modified their environment, perhaps adding Activity bundles and prepared specific instances such as a Activities/Physics simulation.
2. Their modifications include changes to their operating system installed through yum or RPM to obtain some new core functionality.
3. The Learner wants to archive or share this image with friends or for a backup.
4. Personal or private information is scrubbed from the Journal or Browse history and other potential stores.
5. The User creates one or more Sugar Clones.

This method of backup has the advantage that it copies Learner changes to the core operating system as well as the Journal. A LiveOS image using a separate persistent home folder could be partially cloned with either the operating system overlay or home folder without the other should that be desired.

See also

• Other neat uses for the modified_livecd-iso-to-disk script.

Notes

These scripts have been tested with SoaS-Mirabelle (available at http://alt.pub/alt/nightly-composes/soas/) but should work with other versions of SoaS.

The current version of the script has the /bin/bash shell specified without the -x (xtrace) option. Set this option, #!/bin/bash -x in the first line of the script to aid testing. When set, the script will show a lot of output on the screen as it runs.

The script is copied to any new SugarClone devices prepared with this script so that SugarClone images can easily propagate themselves. This also applies to all new SoaS installations that are prepared with these scripts (using --image <source> options).

Needed:

1. More review and testing.
   • SD cards
2. Submission of the modified_livecd-iso-to-disk script upstream.
   • https://bugzilla.redhat.com/show_bug.cgi?id=448030
3. Modifications for XOs.
4. Modifications for Intel Macintosh computers.
   • https://answers.edge.launchpad.net/soas/+question/95622
5. Extraction of the Learner's Sugar image name for labeling the Clone. (available 14 April 2010)
6. A Sugar Activity that calls or controls the scripts.
7. A way to automatically identify extra partitions on devices with more than one available partition.
8. A way to automatically identify live media images on secondary devices and partitions that could be used as sources for a Sugar Clone.
9. Bundling of the scripts for convenience until they are included in SoaS. (available 23 April 2010)
10. Extend the capability to write CD-ROM image files for inexpensive distribution.
11. Extend the facility to any Sugar image.

These all should help us better prepare a SoaS customization kit.

Source

The script is available at http://people.sugarlabs.org/fgrose/SugarClone and is displayed from there below.
The script begins (just after the stock header) with the embedded help functions that describe the script and its usage.