supported ZZ pseudo-code to --exclude-countries

Author: westandskif

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.28.0 (2026-02-15)
+
+- added `ZZ` pseudo-code to `--exclude-countries` to filter out mirrors with undefined country
+
 # 0.27.0 (2026-02-08)
 
 - added Arch4edu support (`arch4edu`)

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "rate_mirrors"
-version = "0.27.0"
+version = "0.28.0"
 authors = ["Nikita Almakov <nikita.almakov@gmail.com>"]
 edition = "2024"
 description = "Everyday-use client-side map-aware mirror ranking tool (Arch Linux; Manjaro; custom ones)"

Cargo.toml

@@ -15,7 +15,7 @@ use crate::target_configs::openbsd::OpenBSDTarget;
 use crate::target_configs::rebornos::RebornOSTarget;
 use crate::target_configs::stdin::StdinTarget;
 // use crate::target_configs::ubuntu::UbuntuTarget;
-use ambassador::{delegatable_trait, Delegate};
+use ambassador::{Delegate, delegatable_trait};
 use clap::{Parser, Subcommand};
 use serde::de::DeserializeOwned;
 use std::collections::HashSet;
@@ -245,6 +245,7 @@ pub struct Config {
     pub entry_country: String,
 
     /// Exclude countries from mirror selection (comma-separated 2-letter ISO country codes).
+    /// Use ZZ to filter out mirrors with undefined country.
     #[arg(
         env = "RATE_MIRRORS_EXCLUDE_COUNTRIES",
         long = "exclude-countries",

src/config.rs

@@ -9,7 +9,7 @@ mod target_configs;
 mod targets;
 
 use crate::config::{AppError, Config, FetchMirrors};
-use crate::speed_test::{test_speed_by_countries, SpeedTestResult, SpeedTestResults};
+use crate::speed_test::{SpeedTestResult, SpeedTestResults, test_speed_by_countries};
 use chrono::prelude::*;
 use config::LogFormatter;
 use itertools::Itertools;
@@ -20,8 +20,8 @@ use std::fmt::Display;
 use std::fs::File;
 use std::io;
 use std::io::prelude::*;
-use std::sync::mpsc;
 use std::sync::Arc;
+use std::sync::mpsc;
 use std::thread;
 
 struct OutputSink<'a, T: LogFormatter> {
@@ -140,7 +140,7 @@ fn main() -> Result<(), AppError> {
         mirrors.retain(|m| {
             m.country
                 .map(|c| !config.is_country_excluded(c.code))
-                .unwrap_or(true)
+                .unwrap_or(!config.excluded_countries_set.contains("zz"))
         });
         if mirrors.len() < before_country {
             tx_progress