preinst is in docbook 4.5-5.1ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #!/bin/sh
set -e
# Automatically added by dh_installcatalogs
if [ "$1" = "upgrade" ] && ! dpkg-query -S /etc/sgml/docbook.cat >/dev/null 2>&1; then
# If the dpkg-query command returns non-zero, the central catalog is
# not owned by any package. This is due to an old behaviour of
# debhelper. Now that file becomes a conffile. In order to avoid a
# question during installation, we remove the old non-conffile.
rm -f /etc/sgml/docbook.cat
fi
# End automatically added section
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