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annotate modules/stdlib/lib/puppet/parser/functions/merge.rb @ 272:c42fb28cff86

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Update to a newer Python module This also pulls in an EPEL module (which we don't use) and a newer stdlib version.
author IBBoard <dev@ibboard.co.uk>
date Fri, 03 Jan 2020 19:56:04 +0000
parents addb0ea390a1
children d9352a684e62
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1 #
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2 # merge.rb
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3 #
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4 module Puppet::Parser::Functions
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5 newfunction(:merge, :type => :rvalue, :doc => <<-'DOC') do |args|
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6 Merges two or more hashes together and returns the resulting hash.
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7
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8 For example:
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9
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10 $hash1 = {'one' => 1, 'two', => 2}
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11 $hash2 = {'two' => 'dos', 'three', => 'tres'}
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12 $merged_hash = merge($hash1, $hash2)
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13 # The resulting hash is equivalent to:
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14 # $merged_hash = {'one' => 1, 'two' => 'dos', 'three' => 'tres'}
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16 When there is a duplicate key, the key in the rightmost hash will "win."
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18 DOC
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20 if args.length < 2
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21 raise Puppet::ParseError, "merge(): wrong number of arguments (#{args.length}; must be at least 2)"
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22 end
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24 # The hash we accumulate into
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25 accumulator = {}
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26 # Merge into the accumulator hash
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27 args.each do |arg|
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28 next if arg.is_a?(String) && arg.empty? # empty string is synonym for puppet's undef
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29 unless arg.is_a?(Hash)
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30 raise Puppet::ParseError, "merge: unexpected argument type #{arg.class}, only expects hash arguments"
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31 end
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32 accumulator.merge!(arg)
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33 end
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34 # Return the fully merged hash
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35 accumulator
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36 end
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37 end