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