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<p>Perhaps the most important way to familiarize CVS users with
Subversion is to let them continue to work on their projects
using the new system. And while that can be somewhat
accomplished using a flat import into a Subversion repository of
an exported CVS repository, the more thorough solution involves
transferring not just the latest snapshot of their data, but all
the history behind it as well, from one system to another. This
is an extremely difficult problem to solve; it involves
deducing changesets in the absence of atomicity and translating
between the systems' completely orthogonal branching policies,
among other complications. Still, a handful of tools claim
to at least partially support the ability to convert
existing CVS repositories into Subversion ones.</p>
<p>The most popular (and mature) conversion tool is
cvs2svn (<a class="ulink" href="http://cvs2svn.tigris.org/" target="_top">http://cvs2svn.tigris.org/</a>), a Python
program originally created by members of Subversion's own
development community. This tool is meant to run exactly once:
it scans your CVS repository multiple times and attempts to
deduce commits, branches, and tags as best it can. When it
finishes, the result is either a Subversion repository or a
portable Subversion dump file representing your code's history.
See the web site for detailed instructions and caveats.</p>
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<p>You are reading <em>Version Control with Subversion</em> (for Subversion 1.7), by Ben Collins-Sussman, Brian W. Fitzpatrick, and C. Michael Pilato.<br />
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To submit comments, corrections, or other contributions to the text, please visit <a href="http://www.svnbook.com/">http://www.svnbook.com/</a>.</p>
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