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Re: Rollback

From: Kaz Kylheku
Subject: Re: Rollback
Date: Mon, 10 Sep 2001 17:28:35 GMT
User-agent: slrn/ (Linux)

In article <address@hidden>, Cornellious Mann wrote:
>Is there a concept of rollback in CVS?  What is the
>best practice for removing a change that is checked
>in, but is not a good change?  Thanks.

The concept of rollback is flawed in the context of a truly concurrent
versioning system. By the time you decide that the change is bad,
someone may have tagged it with a release, or started a branch at
that point and so on. Rolling back would be a destructive operation
that could corrupt the structure of the repository.

Instead, what you must do is simply to undo your edits, and then 
commit a new version.  CVS can help you undo your edits as a reverse
merge operation. For example, if the mistaken revision is 1.18, you
can apply a reverse patch from 1.18 to 1.17 to your working copy:

        cvs update -j 1.18 -j 1.17 <filename>

This will work even if 1.18 is no longer the latest version, in which
case there may be conflicts to resolve.

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