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-rw-r--r--lib/puppet/parser/functions/merge.rb28
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/merge.rb b/lib/puppet/parser/functions/merge.rb
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+++ b/lib/puppet/parser/functions/merge.rb
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+module Puppet::Parser::Functions
+
+ newfunction(:merge, :type => :rvalue, :doc => <<-'ENDHEREDOC') do |args|
+ Merges two or more hashes together and returns the resulting hash.
+
+ For example:
+
+ $hash1 = {'one' => 1, 'two', => 2}
+ $hash1 = {'two' => 2, 'three', => 2}
+ $merged_hash = merge($hash1, $hash2)
+ # merged_hash = {'one' => 1, 'two' => 2, 'three' => 2}
+
+ ENDHEREDOC
+
+ if args.length < 2
+ raise Puppet::ParseError, ("merge(): wrong number of arguments (#{args.length}; must be at least 2)")
+ end
+ args.each do |arg|
+ unless arg.is_a?(Hash)
+ raise Puppet::ParseError, "merge: unexpected argument type #{arg.class}, only expects hash arguments"
+ end
+ end
+
+ args.inject({}, :merge)
+
+ end
+
+end