A.9.2.1 Committing to a branch

You can commit to a branch revision (one that has an even number of dots) with the ‘-r’ option. To create a branch revision, use the ‘-b’ option of the rtag or tag commands (see section Branching and merging). Then, either checkout or update can be used to base your sources on the newly created branch. From that point on, all commit changes made within these working sources will be automatically added to a branch revision, thereby not disturbing main-line development in any way. For example, if you had to create a patch to the 1.2 version of the product, even though the 2.0 version is already under development, you might do:

$ cvs rtag -b -r FCS1_2 FCS1_2_Patch product_module
$ cvs checkout -r FCS1_2_Patch product_module
$ cd product_module
[[ hack away ]]
$ cvs commit

This works automatically since the ‘-r’ option is sticky.