/usr/bin/puppet is in puppet-common 3.8.5-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/usr/bin/ruby
# For security reasons, ensure that '.' is not on the load path
# This is primarily for 1.8.7 since 1.9.2+ doesn't put '.' on the load path
$LOAD_PATH.delete '.'
require 'puppet/util/command_line'
Puppet::Util::CommandLine.new.execute
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