A dpatch is a program that modifies the source tree in a given
directory. How it does that is entirely up to the person
writing it. It can be a script that calls patch(1) with the
appropriate options, a complicated perl script that does some deep
magic, or anything else. The only requirement is that it MUST
accept the -patch and -unpatch options, followed by the
destination (or working) directory, when specified. For the sake of
compatibility, the second argument is only present when a working
directory was explicitly set with dpatch --workdir.
For some of the dpatch(1) features to work, the script should
follow a common style: there should be a line near the top of the file
with the following format: "filename -- author
<email>". And one or more "# DP: description" lines. These
will be used by dpatch cat for example.
EXAMPLES
One can find dpatch examples under
/usr/share/doc/dpatch/examples/.