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Puppet::Type.newtype(:file_line) do

desc <<-EOT
Ensures that a given line is contained within a file. The implementation
matches the full line, including whitespace at the beginning and end. If
the line is not contained in the given file, Puppet will add the line to
ensure the desired state. Multiple resources may be declared to manage
multiple lines in the same file.

Example:

file_line { 'sudo_rule':
path => '/etc/sudoers',
line => '%sudo ALL=(ALL) ALL',
}
file_line { 'sudo_rule_nopw':
path => '/etc/sudoers',
line => '%sudonopw ALL=(ALL) NOPASSWD: ALL',
}

In this example, Puppet will ensure both of the specified lines are
contained in the file /etc/sudoers.

EOT

ensurable do
defaultvalues
defaultto :present
end

newparam(:name, :namevar => true) do
desc 'An arbitrary name used as the identity of the resource.'
end

newparam(:match) do
desc 'An optional regular expression to run against existing lines in the file;\n' +
'if a match is found, we replace that line rather than adding a new line.'
end

newparam(:line) do
desc 'The line to be appended to the file located by the path parameter.'
end

newparam(:path) do
desc 'The file Puppet will ensure contains the line specified by the line parameter.'
validate do |value|
unless (Puppet.features.posix? and value =~ /^\//) or (Puppet.features.microsoft_windows? and (value =~ /^.:\// or value =~ /^\/\/[^\/]+\/[^\/]+/))
raise(Puppet::Error, "File paths must be fully qualified, not '#{value}'")
end
end
end

# Autorequire the file resource if it's being managed
autorequire(:file) do
self[:path]
end

validate do
unless self[:line] and self[:path]
raise(Puppet::Error, "Both line and path are required attributes")
end

if (self[:match])
unless Regexp.new(self[:match]).match(self[:line])
raise(Puppet::Error, "When providing a 'match' parameter, the value must be a regex that matches against the value of your 'line' parameter")
end
end

end
end
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