don't emit function result if secret()

Author: SteveL-MSFT

dsc_lib/src/parser/expressions.rs

@@ -113,9 +113,11 @@ impl Expression {
     /// This function will return an error if the expression fails to execute.
     pub fn invoke(&self, function_dispatcher: &FunctionDispatcher, context: &Context) -> Result<Value, DscError> {
         let result = self.function.invoke(function_dispatcher, context)?;
-        // TODO: check if `secret()` function and don't emit result
-        let result_json = serde_json::to_string(&result)?;
-        trace!("{}", t!("parser.expression.functionResult", results = result_json));
+        // skip trace if function is 'secret()'
+        if self.function.name() != "secret" {
+            let result_json = serde_json::to_string(&result)?;
+            trace!("{}", t!("parser.expression.functionResult", results = result_json));
+        }
         if self.accessors.is_empty() {
             Ok(result)
         }

dsc_lib/src/parser/functions.rs

@@ -86,6 +86,11 @@ impl Function {
 
         function_dispatcher.invoke(&self.name, &resolved_args, context)
     }
+
+    /// Get the name of the function.
+    pub fn name(&self) -> &str {
+        &self.name
+    }
 }
 
 fn convert_args_node(statement_bytes: &[u8], args: Option<&Node>) -> Result<Option<Vec<FunctionArg>>, DscError> {