Merge pull request #601 from petems/MODULES-1439-any2bool_added

(MODULES-1439) Adds any2bool function

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/puppet/parser/functions/any2bool.rb b/lib/puppet/parser/functions/any2bool.rb
new file mode 100644
index 0000000..f0f8f83
--- /dev/null
+++ b/lib/puppet/parser/functions/any2bool.rb
@@ -0,0 +1,55 @@
+#
+# any2bool.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:any2bool, :type => :rvalue, :doc => <<-EOS
+This converts 'anything' to a boolean. In practise it does the following:
+
+* Strings such as Y,y,1,T,t,TRUE,yes,'true' will return true
+* Strings such as 0,F,f,N,n,FALSE,no,'false' will return false
+* Booleans will just return their original value
+* Number (or a string representation of a number) > 0 will return true, otherwise false
+* undef will return false
+* Anything else will return true
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "any2bool(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    # If argument is already Boolean, return it
+    if !!arguments[0] == arguments[0]
+      return arguments[0]
+    end
+
+    arg = arguments[0]
+
+    if arg == nil
+      return false
+    end
+
+    if arg == :undef
+      return false
+    end
+
+    valid_float = !!Float(arg) rescue false
+
+    if arg.is_a?(Numeric)
+      return function_num2bool( [ arguments[0] ] )
+    end
+
+    if arg.is_a?(String)
+      if valid_float
+        return function_num2bool( [ arguments[0] ] )
+      else
+        return function_str2bool( [ arguments[0] ] )
+      end
+    end
+
+    return true
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :