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require 'fileutils'
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require 'yaml'
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# Retrieves data from a cache file, or creates it with supplied data if the file doesn't exist
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#
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# Useful for having data that's randomly generated once on the master side (e.g. a password), but
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# then stays the same on subsequent runs.
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#
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# Usage: cache_data(name, initial_data)
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# Example: $password = cache_data("mysql_password", random_password(32))
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module Puppet::Parser::Functions
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newfunction(:cache_data, :type => :rvalue) do |args|
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raise Puppet::ParseError, 'Usage: cache_data(name, initial_data)' unless args.size == 2
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name = args[0]
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raise Puppet::ParseError, 'Must provide data name' unless name
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initial_data = args[1]
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cache_dir = File.join(Puppet[:vardir], 'foreman_cache_data')
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cache = File.join(cache_dir, name)
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if File.exists? cache
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YAML.load(File.read(cache))
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else
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FileUtils.mkdir_p cache_dir unless File.exists? cache_dir
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File.open(cache, 'w', 0600) do |c|
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c.write(YAML.dump(initial_data))
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end
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initial_data
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end
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end
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end
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