Make server directory relative to configuration file directory

src/action/start.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 
 use clap::ArgMatches;
 
-use crate::config::{self, Config};
+use crate::config::{self, Config, Server as ConfigServer};
 use crate::mc::server_properties;
 use crate::proto;
 use crate::service;
@@ -120,7 +120,7 @@ fn rewrite_server_properties(config: &Config) {
     }
 
     // Ensure server directory is set, it must exist
-    let dir = match &config.server.directory {
+    let dir = match ConfigServer::server_directory(config) {
         Some(dir) => dir,
         None => {
             warn!(target: "lazymc", "Not rewriting {} file, server directory not configured (server.directory)", server_properties::FILE);

src/config.rs

@@ -1,7 +1,7 @@
 use std::fs;
 use std::io;
 use std::net::SocketAddr;
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 use clap::ArgMatches;
 use serde::Deserialize;
@@ -63,6 +63,12 @@ pub fn load(matches: &ArgMatches) -> Config {
 /// Configuration.
 #[derive(Debug, Deserialize)]
 pub struct Config {
+    /// Configuration path if known.
+    ///
+    /// Should be used as base directory for filesystem operations.
+    #[serde(skip)]
+    pub path: Option<PathBuf>,
+
     /// Public configuration.
     #[serde(default)]
     pub public: Public,
@@ -101,9 +107,9 @@ pub struct Config {
 
 impl Config {
     /// Load configuration from file.
-    pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, io::Error> {
-        let data = fs::read(path)?;
-        let config: Config = toml::from_slice(&data)?;
+    pub fn load(path: PathBuf) -> Result<Self, io::Error> {
+        let data = fs::read(&path)?;
+        let mut config: Config = toml::from_slice(&data)?;
 
         // Show warning if config version is problematic
         match &config.config.version {
@@ -118,6 +124,7 @@ impl Config {
                 Ok(true) => {}
             },
         }
+        config.path.replace(path);
 
         Ok(config)
     }
@@ -152,8 +159,10 @@ impl Default for Public {
 #[derive(Debug, Deserialize)]
 pub struct Server {
     /// Server directory.
+    ///
+    /// Private because you should use `Server::server_directory()` instead.
     #[serde(default = "option_pathbuf_dot")]
-    pub directory: Option<PathBuf>,
+    directory: Option<PathBuf>,
 
     /// Start command.
     pub command: String,
@@ -194,6 +203,23 @@ pub struct Server {
     pub send_proxy_v2: bool,
 }
 
+impl Server {
+    /// Get the server directory.
+    ///
+    /// This does not check whether it exists.
+    pub fn server_directory(config: &Config) -> Option<PathBuf> {
+        if config.server.directory.is_none() {
+            return None;
+        }
+
+        // Get directory, relative to config directory if known
+        match config.path.as_ref().and_then(|p| p.parent()) {
+            Some(config_dir) => Some(config_dir.join(config.server.directory.as_ref().unwrap())),
+            None => config.server.directory.clone(),
+        }
+    }
+}
+
 /// Time configuration.
 #[derive(Debug, Deserialize)]
 #[serde(default)]

src/mc/server_properties.rs

@@ -11,39 +11,39 @@ const EOL: &str = "\r\n";
 /// Try to rewrite changes in server.properties file in dir.
 ///
 /// Prints an error and stops on failure.
-pub fn rewrite_dir(dir: &Path, changes: HashMap<&str, String>) {
+pub fn rewrite_dir<P: AsRef<Path>>(dir: P, changes: HashMap<&str, String>) {
     if changes.is_empty() {
         return;
     }
 
     // Ensure directory exists
-    if !dir.is_dir() {
+    if !dir.as_ref().is_dir() {
         warn!(target: "lazymc",
             "Not rewriting {} file, configured server directory doesn't exist: {}",
             FILE,
-            dir.to_str().unwrap_or("?")
+            dir.as_ref().to_str().unwrap_or("?")
         );
         return;
     }
 
     // Rewrite file
-    rewrite_file(&dir.join(FILE), changes)
+    rewrite_file(dir.as_ref().join(FILE), changes)
 }
 
 /// Try to rewrite changes in server.properties file.
 ///
 /// Prints an error and stops on failure.
-pub fn rewrite_file(file: &Path, changes: HashMap<&str, String>) {
+pub fn rewrite_file<P: AsRef<Path>>(file: P, changes: HashMap<&str, String>) {
     if changes.is_empty() {
         return;
     }
 
     // File must exist
-    if !file.is_file() {
+    if !file.as_ref().is_file() {
         warn!(target: "lazymc",
             "Not writing {} file, not found at: {}",
             FILE,
-            file.to_str().unwrap_or("?"),
+            file.as_ref().to_str().unwrap_or("?"),
         );
         return;
     }

src/server.rs

@@ -12,7 +12,7 @@ use tokio::sync::Semaphore;
 use tokio::sync::{Mutex, RwLock, RwLockReadGuard};
 use tokio::time;
 
-use crate::config::Config;
+use crate::config::{Config, Server as ConfigServer};
 use crate::mc::ban::{BannedIp, BannedIps};
 use crate::os;
 
@@ -421,7 +421,7 @@ pub async fn invoke_server_cmd(
     cmd.kill_on_drop(true);
 
     // Set working directory
-    if let Some(ref dir) = config.server.directory {
+    if let Some(ref dir) = ConfigServer::server_directory(&config) {
         cmd.current_dir(dir);
     }
 

src/service/ban_reload.rs

@@ -6,7 +6,7 @@ use std::time::Duration;
 
 use notify::{watcher, DebouncedEvent, RecursiveMode, Watcher};
 
-use crate::config::Config;
+use crate::config::{Config, Server as ConfigServer};
 use crate::mc::ban;
 use crate::server::Server;
 
@@ -23,7 +23,7 @@ pub fn service(config: Arc<Config>, server: Arc<Server>) {
     }
 
     // Ensure server directory is set, it must exist
-    let dir = match &config.server.directory {
+    let dir = match ConfigServer::server_directory(&config) {
         Some(dir) => dir,
         None => {
             warn!(target: "lazymc", "Not blocking banned IPs, server directory not configured, unable to find {} file", ban::FILE);

src/status.rs

@@ -12,7 +12,7 @@ use tokio::fs;
 use tokio::io::AsyncWriteExt;
 use tokio::net::TcpStream;
 
-use crate::config::*;
+use crate::config::{Config, Server as ConfigServer};
 use crate::join;
 use crate::mc::favicon;
 use crate::proto::action;
@@ -260,7 +260,7 @@ async fn server_status(client_info: &ClientInfo, config: &Config, server: &Serve
 /// This always returns a favicon, returning the default one if none is set.
 async fn server_favicon(config: &Config) -> String {
     // Get server dir
-    let dir = match config.server.directory.as_ref() {
+    let dir = match ConfigServer::server_directory(config) {
         Some(dir) => dir,
         None => return favicon::default_favicon(),
     };