wg-openvpn

install prerequisities

sudo apt-get build-dep openvpn

build deb from source

dpkg-buildpackage -uc -b

build deb from deb source

dpkg-source -x openvpn-XXX.dsc
cd openvpn-XXX
dpkg-buildpackage -uc -b

clean build space

./debian/rules clean

create patch

# init patch file
quilt new <patch name>.patch

# edit per file
quilt add /path/to/file
emacs /path/to/file # edit
quilt refresh

# write header to identify what is done in patch file
quilt -e header
quilt refresh

# finalize
quilt pop

To test patch

# apply patch in order written in debian/patches/series
quilt push

# revert patch in reverse order written in debian/patches/series
quilt pop