preinst is in puppet-common 5.4.0-2ubuntu3.
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
# Stop puppet agent before removing /usr/bin/puppet on upgrade; otherwise the
# initscript will fail to stop the service, see #859454.
if [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" lt "4.4.2-1~"; then
if [ -x "/etc/init.d/puppet" ]; then
invoke-rc.d puppet stop || true
fi
fi
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