tails/config/chroot_local-hooks/59-libdvd-pkg

#!/bin/sh
set -e
set -u

echo "Installing libdvd-pkg"

apt-get --yes install libdvd-pkg
dpkg-reconfigure libdvd-pkg

# Create and install a fake libdvd-pkg package. This is necessary for
# libdvdcss2 (the actual dvd decoding package) which depends on
# libdvd-pkg. libdvd-pkg however depends on build-essential, which is
# explicitly removed. So instead we build/install a fake libdvd-pkg
# without the build-essential dependency to satisfy libdvdcss2.
tmp="$(mktemp -d)"
apt-get install --yes equivs

LIBDVD_PKG_VERSION="$(dpkg-query -s libdvd-pkg | grep Version | cut -d ' ' -f2)+fake1"

cat > "${tmp}/libdvd-pkg-${LIBDVD_PKG_VERSION}.control" << EOF
Section: multimedia
Priority: optional
Homepage: https://tails.boum.org/
Standards-Version: 3.6.2

Package: libdvd-pkg
Version: ${LIBDVD_PKG_VERSION}
Maintainer: Tails developers <amnesia@boum.org>
Architecture: all
Description: (Fake) libdvd-pkg package
 Provide placeholder to keep libdvdcss2 happy.
EOF

(
    cd "${tmp}"
    equivs-build "libdvd-pkg-${LIBDVD_PKG_VERSION}.control"
    dpkg -i "libdvd-pkg_${LIBDVD_PKG_VERSION}_all.deb"
)
rm -r "${tmp}" /usr/src/libdvd-pkg

# Verify installed packages:
for x in libdvd-pkg
do
    dpkg -s $x
    dpkg-query -W -f='${Version}\n' $x
done

# Remove dangling symlink -- note that we absolutely do not want the
# functionality (automatic checks and upgrades for new css sources)
# that the removed script provides.
rm -f /etc/apt/apt.conf.d/88libdvdcss-pkg