a06c0d8115
This commit adds a new parameter called "match" to the file_line resource type, and support for this new parameter to the corresponding ruby provider. This parameter is optional; file_line should work just as before if you do not specify this parameter... so this change should be backwards-compatible. If you do specify the parameter, it is treated as a regular expression that should be used when looking through the file for a line. This allows you to do things like find a line that begins with a certain prefix (e.g., "foo=.*"), and *replace* the existing line with the line you specify in your "line" parameter. Without this capability, if you already had a line "foo=bar" in your file and your "line" parameter was set to "foo=baz", you'd end up with *both* lines in the final file. In many cases this is undesirable.
59 lines
1.4 KiB
Ruby
59 lines
1.4 KiB
Ruby
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Puppet::Type.type(:file_line).provide(:ruby) do
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def exists?
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lines.find do |line|
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line.chomp == resource[:line].chomp
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end
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end
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def create
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if resource[:match]
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handle_create_with_match()
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else
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handle_create_without_match()
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end
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end
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def destroy
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local_lines = lines
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File.open(resource[:path],'w') do |fh|
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fh.write(local_lines.reject{|l| l.chomp == resource[:line] }.join(''))
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end
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end
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private
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def lines
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# If this type is ever used with very large files, we should
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# write this in a different way, using a temp
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# file; for now assuming that this type is only used on
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# small-ish config files that can fit into memory without
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# too much trouble.
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@lines ||= File.readlines(resource[:path])
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end
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def handle_create_with_match()
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regex = resource[:match] ? Regexp.new(resource[:match]) : nil
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match_count = lines.select { |l| regex.match(l) }.count
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if match_count > 1
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raise Puppet::Error, "More than one line in file '#{resource[:path]}' matches pattern '#{resource[:match]}'"
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end
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File.open(resource[:path], 'w') do |fh|
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lines.each do |l|
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fh.puts(regex.match(l) ? resource[:line] : l)
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end
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if (match_count == 0)
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fh.puts(resource[:line])
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end
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end
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end
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def handle_create_without_match
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File.open(resource[:path], 'a') do |fh|
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fh.puts resource[:line]
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end
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end
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end
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