nixenv: filter out user setting warninsg too

ofborg/src/nix.rs

@@ -353,7 +353,7 @@ fn lines_from_file(file: fs::File) -> Vec<String> {
         .collect()
 }
 
-fn is_user_setting_warning(line: &str) -> bool {
+pub fn is_user_setting_warning(line: &str) -> bool {
     let line = line.trim();
     line.starts_with("warning: ignoring the user-specified setting '")
         && line.ends_with("because it is a restricted setting and you are not a trusted user")

ofborg/src/nixenv.rs

@@ -43,6 +43,7 @@ impl HydraNixEnv {
                 .collect::<Result<Vec<String>, _>>()?
                 .into_iter()
                 .filter(|msg| msg.trim().len() > 0)
+                .filter(|line| !nix::is_user_setting_warning(line))
                 .collect::<Vec<String>>();
 
             if evaluation_errors.len() > 0 {