View source for 2008 Summer Project Week:CVS SVN Synchronization

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===Key Investigators===
* Sebastien Barre
* Steve Pieper
* Bill Hoffmann
* Will Schroeder
* Jim Miller

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<h1>Objective</h1>
To discuss options for supporting access to CVS repositories for people behind firewalls (includes corporate, overseas, hotels, etc).
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<h1>Approach, Plan</h1>

The current approach is based on the [http://slicer.spl.harvard.edu/slicerWiki/index.php/Slicer3-lib-mirror Slicer3-lib-mirror repository] which contains a full CVS checkout of a particular state of a toolkit checked into an SVN repository (see link for details).

Updating the SVN repository is currently done manually leading to the versions getting out of sync.  A nightly or continuous update is possible, but unless done carefully could lead to a overwhelming of the SVN repository.

Options to consider:
* review current cvs to svn conversion scripts.  Downside is that these take several hours to run for a large repository because they covert all history.  When last checked weren't these also reported to require some manual intervention for some cases? (SP)
* write an automated version of the current approach which deletes the old versions completely (to save on database size).
* other options?

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<h1>Progress</h1>

The current approach is successfully used by the experimental  [http://slicer.spl.harvard.edu/slicerWiki/index.php/Slicer3:getbuildtest getbuildtest2.tcl] build script.

This week we discussed options and decided that there is now ideal solution, but making a nightly export of cvs-based repositories into an svn mirror will work for the majority of cases.  Kitware will set up a cron job to implement this functionality for CMake, ITK, VTK, and KWWidgets.

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===References===

* [http://www.python.org www.python.org]