defaults in cfengine

gistfile1.txt

body common control
{
        bundlesequence => { "g", "main", };
}

bundle common g
{
   defaults:
      "a" string => "default value";

   vars:
      "b" string => ifelse(
         "set", "set value for 'b'",
         "default value for 'b'"
         );

      set::
         "a" string => "A 'set' value";
}

bundle agent main
{
   reports:
      "a is ${g.a}";
      "b is ${g.b}";
}

neil@ettin ~/.cfagent/inputs $ cf-agent -Kf ./default.cf
R: a is default value
R: b is default value for 'b'

neil@ettin ~/.cfagent/inputs $ cf-agent -Kf ./default.cf -D set
R: a is A 'set' value
R: b is set value for 'b'