Try being multiplatform with our config files.

Cargo.toml

@@ -14,6 +14,7 @@ path="server/main.rs"
 [dependencies]
 anyhow = "^1.0.57"
 clap = { version = "^3.1.18", features = ["derive"] }
+etcetera = "^0.4.0"
 futures = "0.3.21"
 if-addrs = "0.7.0"
 lazy_static = "1.4.0"
@@ -25,7 +26,6 @@ tokio = { version = "^1", features = ["full"] }
 toml = "^0.5.9"
 tracing = "^0.1.34"
 tracing-subscriber = { version = "^0.3.11", features = ["env-filter"] }
-xdg = "2.4.1"
 
 [dev-dependencies]
 proptest = "1.0.0"

server/config.rs

@@ -10,14 +10,11 @@ use std::net::{AddrParseError, IpAddr, Ipv4Addr, SocketAddr, SocketAddrV4};
 use std::str::FromStr;
 use thiserror::Error;
 use tracing::metadata::LevelFilter;
-use xdg::BaseDirectoriesError;
 
 #[derive(Debug, Error)]
 pub enum ConfigError {
     #[error(transparent)]
     CommandLineError(#[from] clap::Error),
-    #[error("Error querying XDG base directories: {0}")]
-    XdgError(#[from] BaseDirectoriesError),
     #[error(transparent)]
     IOError(#[from] io::Error),
     #[error("TOML processing error: {0}")]
@@ -26,6 +23,8 @@ pub enum ConfigError {
     NoAddressForInterface(String, String),
     #[error("Server '{0}' specifies an address we couldn't parse: {1}")]
     AddressParseError(String, AddrParseError),
+    #[error("Host directory error {0}")]
+    HostDirectoryError(String),
 }
 
 #[derive(Debug)]

server/config/config_file.rs

@@ -1,10 +1,10 @@
 use super::ConfigError;
+use etcetera::base_strategy::{choose_base_strategy, BaseStrategy};
 use serde::{Deserialize, Deserializer};
 use std::collections::HashMap;
 use std::fs;
 use std::path::PathBuf;
 use tracing::metadata::LevelFilter;
-use xdg::BaseDirectories;
 
 #[derive(serde_derive::Deserialize, Default)]
 pub struct ConfigFile {
@@ -42,8 +42,10 @@ where
 impl ConfigFile {
     pub fn read(mut config_file_path: Option<PathBuf>) -> Result<ConfigFile, ConfigError> {
         if config_file_path.is_none() {
-            let base_dirs = BaseDirectories::with_prefix("socks5")?;
-            let proposed_path = base_dirs.get_config_home();
+            let base_dirs = choose_base_strategy()
+                .map_err(|e| ConfigError::HostDirectoryError(e.to_string()))?;
+            let mut proposed_path = base_dirs.config_dir();
+            proposed_path.push("socks5");
             if let Ok(attributes) = fs::metadata(proposed_path.clone()) {
                 if attributes.is_file() {
                     config_file_path = Some(proposed_path);