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(cvsbook.info)The cvswrappers File

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The cvswrappers File
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The redundantly-named cvswrappers file gives you a way to specify that
certain files should be treated as binary, based on their file name.
CVS does not assume that all .jpg files are JPG image data, for example,
so it doesn't automatically use -kb when adding JPG files.  Nonetheless,
certain projects would find it very useful to simply designate all JPG
files as binary.  Here is a line in cvswrappers to do that:

     *.jpg -k 'b'

The `b' is separate and in quotes because it's not the only possible
RCS keyword expansion mode; one could also specify `o', which means not
to expand `$' sign keywords but to do newline conversion.  However, `b'
is the most common parameter.

There are a few other modes that can be specified from the wrappers
file, but they're for such rare situations that they're probably not
worth documenting here (translation: your author has never had to use
them).  See the node `Wrappers' in the Cederqvist if you're curious.