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Say you have been working on some extremely experimental software, based on whatever revision you happened to checkout last week. If others in your group would like to work on this software with you, but without disturbing main-line development, you could commit your change to a new branch. Others can then checkout your experimental stuff and utilize the full benefit of CVS conflict resolution. The scenario might look like:
[[ hacked sources are present ]] $ cvs tag -b EXPR1 $ cvs update -r EXPR1 $ cvs commit
update command will make the `-r
EXPR1' option sticky on all files. Note that your
changes to the files will never be removed by the
update command. The
automatically commit to the correct branch, because the
`-r' is sticky. You could also do like this:
[[ hacked sources are present ]] $ cvs tag -b EXPR1 $ cvs commit -r EXPR1
but then, only those files that were changed by you will have the `-r EXPR1' sticky flag. If you hack away, and commit without specifying the `-r EXPR1' flag, some files may accidentally end up on the main trunk.
To work with you on the experimental change, others would simply do
$ cvs checkout -r EXPR1 whatever_module
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