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Re: Creat diff between a branch's create point and its current state?

From: Dennis Jones
Subject: Re: Creat diff between a branch's create point and its current state?
Date: Wed, 18 Jul 2007 18:30:49 GMT

"Skip Montanaro" <address@hidden> wrote in message 
>I created a branch from HEAD, worked on it for awhile, but never
> merged it back to HEAD.  For various reasons (mostly my CVS
> incompetence) merging the branch back to HEAD or merging HEAD to the
> branch is generating tons of conflicts.  Is there a way to generate a
> diff between the initial state of the branch and its current state?

Two ways:

1a.  If you also created a symbolic tag at the same time you created the 
branch tag (which is what you should have done), then you just diff the 
branch tag (which is the branch's current head) against that symbolic tag.
1b. If you did not create a symbolic tag, you can still create one based on 
the date/time the branch was created (assuming you know exactly when you 
created the branch).  You can use 'cvs tag' or 'cvs rtag' with the -D (for 
date) switch to create the symbolic tag.

2. Use the -D switch on the 'cvs diff' command to specify the date/time when 
you created the branch as the starting point, and the branch tag as the 
ending point.  For example:

cvs di -D <date/time> -r <branch>

CVS accepts lots of different date/time syntaxes, but an easy one is: 
"yyyy-mm-dd hh:mm:ss" (quotes are required because of the space between the 
date and time).  However, timestamps can be tricky.  For example, time 
stamps in CVS are usually given in UTC (for example in the case of a 'cvs 
log' command), so if you want to do a diff using a date/time, you may find 
that you have to specify the time according to your local timezone, and not 
in UTC (as 'cvs log' gives).  Assuming you can manage the timestamp issue, 
you should have no trouble getting the diff you need.

- Dennis 

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