file/debian/magic-symlink

#!/bin/sh

set -e

HOST_ARCH="$1"
HOST_MULTIARCH="$2"

# Create /usr/share/file/magic.mgc as a symlink if the installed
# libmagic1 is in the primary architecture.

[ "$HOST_MULTIARCH" ]

cat <<__EOS__ >>debian/libmagic1.postinst.debhelper

if [ "\$1" = 'configure' ] && [ "\$(dpkg --print-architecture)" = '$HOST_ARCH' ] ; then
    ln -sf /usr/lib/$HOST_MULTIARCH/file/magic.mgc /usr/share/file/magic.mgc
fi

__EOS__

cat <<__EOS__ >>debian/libmagic1.prerm.debhelper

if [ "\$1" = 'configure' ] && [ "\$(dpkg --print-architecture)" = '$HOST_ARCH' ] && [ -L /usr/share/file/magic.mgc ] ; then
    rm /usr/share/file/magic.mgc
fi

__EOS__