1 files changed, 71 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/range.rb b/lib/puppet/parser/functions/range.rb
new file mode 100644
index 0000000..6e85422
--- /dev/null
+++ b/lib/puppet/parser/functions/range.rb
@@ -0,0 +1,71 @@
+#
+# range.rb
+#
+
+# TODO(Krzysztof Wilczynski): We probably need to approach numeric values differently ...
+
+module Puppet::Parser::Functions
+  newfunction(:range, :type => :rvalue, :doc => <<-EOS
+When given range in the form of (start, stop) it will extrapolate a range as
+an array.
+
+*Examples:*
+
+    range("0", "9")
+
+Will return: [0,1,2,3,4,5,6,7,8,9]
+
+    range("a", "c")
+
+Will return: ["a","b","c"]
+    EOS
+  ) do |arguments|
+
+    # We support more than one argument but at least one is mandatory ...
+    raise(Puppet::ParseError, "range(): Wrong number of " +
+      "arguments given (#{arguments.size} for 1)") if arguments.size < 1
+
+    if arguments.size > 1
+      start = arguments[0]
+      stop  = arguments[1]
+
+      type = '..' # We select simplest type for Range available in Ruby ...
+
+    elsif arguments.size > 0
+      value = arguments[0]
+
+      if m = value.match(/^(\w+)(\.\.\.?|\-)(\w+)$/)
+        start = m[1]
+        stop  = m[3]
+
+        type = m[2]
+
+      elsif value.match(/^.+$/)
+        raise(Puppet::ParseError, 'range(): Unable to compute range ' +
+          'from the value given')
+      else
+        raise(Puppet::ParseError, 'range(): Unknown format of range given')
+      end
+    end
+
+      # Check whether we have integer value if so then make it so ...
+      if start.match(/^\d+$/)
+        start = start.to_i
+        stop  = stop.to_i
+      else
+        start = start.to_s
+        stop  = stop.to_s
+      end
+
+      range = case type
+        when /^(\.\.|\-)$/ then (start .. stop)
+        when /^(\.\.\.)$/  then (start ... stop) # Exclusive of last element ...
+      end
+
+      result = range.collect { |i| i } # Get them all ... Pokemon ...
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :