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-# common/manifests/defines/line.pp -- a trivial mechanism to ensure a line exists in a file
-# Copyright (C) 2007 David Schmitt <david@schmitt.edv-bus.at>
-# See LICENSE for the full license granted to you.
-
-# Ensures that a specific line is present or absent in a file. This can
-# be very brittle, since even small changes can throw this off.
-#
-# If the line is not present yet, it will be appended to the file.
-#
-# The name of the define is not used. Just keep it (globally) unique and
-# descriptive.
-#
-# Use this only for very trivial stuff. Usually replacing the whole file
-# is a more stable solution with less maintenance headaches afterwards.
-#
-# Usage:
-# line { description:
-# file => "filename",
-# line => "content",
-# ensure => {absent,*present*}
-# }
-#
-# Example:
-# The following ensures that the line "allow ^$munin_host$" exists in
-# /etc/munin/munin-node.conf, and if there are any changes notify the
-# service for a restart
-#
-# line {
-# allow_munin_host:
-# file => "/etc/munin/munin-node.conf",
-# line => "allow ^$munin_host$",
-# ensure => present,
-# notify => Service[munin-node],
-# require => Package[munin-node];
-# }
-#
-# Code with fixes gathered at
-# http://reductivelabs.com/trac/puppet/wiki/Recipes/SimpleText
-define line($file, $line, $ensure = 'present') {
- case $ensure {
- default : { err ( "unknown ensure value '${ensure}'" ) }
- present: {
- exec { "echo '${line}' >> '${file}'":
- unless => "grep -qFx '${line}' '${file}'"
- }
- }
- absent: {
- $subst_line = regsubst($line,'(/|\.)','\\\1','G')
- exec { "sed -i '/${subst_line}/d' '${file}'":
- onlyif => "grep -qFx '${line}' '${file}'"
- }
- }
- }
-}