CFEngine Mustache template with variable defaults

mustache-test.cf

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

bundle agent main {
	vars:
		"var1" string => "this is var1";
                
		"out1" string => string_mustache("{{vars.main.var1}}");
		"out2" string => string_mustache("{{vars.main.var2}}");
		"out2default" string => string_mustache("{{vars.main.var2}}{{^vars.main.var2}}default{{/vars.main.var2}}");

	reports:
		"var1 = $(out1)";
		"var2 = $(out2)";
		"var2 w/ default = $(out2default)";
}