feat: some improvements

src/main.rs

@@ -1,10 +1,14 @@
-use std::io;
-
 mod server;
 
+use server::{ServerCommand, ServerType};
+use std::io;
+
 fn main() {
-    let mut server =
-        server::ServerCommand::new("paper-1.19.4-545.jar", "data/config", "data/worlds")
+    let mut server = server::ServerCommand::new(ServerType::Paper, "1.19.4-545")
+        .jar("paper-1.19.4-545.jar")
+        .config("data/config")
+        .world("data/worlds")
+        .backup("data/backups")
         .mem(512, 1024)
         .spawn()
         .unwrap();
@@ -16,7 +20,9 @@ fn main() {
         input.clear();
         stdin.read_line(input);
         println!("input: {}", input.trim());
-        server.send_command(input);
+        if let Err(e) = server.send_command(input) {
+            println!("{}", e);
+        };
 
         if input.trim() == "stop" {
             break;

src/server/command.rs

@@ -1,32 +1,52 @@
 use crate::server::ServerProcess;
-use flate2::write::GzEncoder;
-use flate2::Compression;
 use std::fs::File;
-use std::io;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::process::{Child, Command, Stdio};
+use std::fmt;
+
+pub enum ServerType {
+    Paper,
+    Forge,
+    Vanilla,
+}
+
+impl fmt::Display for ServerType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let s = match self {
+            ServerType::Paper => "PaperMC",
+            ServerType::Forge => "Forge",
+            ServerType::Vanilla => "Vanilla",
+        };
+
+        write!(f, "{}", s)
+    }
+}
 
 pub struct ServerCommand {
+    type_: ServerType,
+    version: String,
     java: String,
     jar: PathBuf,
     config_dir: PathBuf,
     world_dir: PathBuf,
+    backup_dir: PathBuf,
     xms: u32,
     xmx: u32,
-    child: Option<Child>,
 }
 
 impl ServerCommand {
-    pub fn new(jar: &str, config_dir: &str, world_dir: &str) -> Self {
+    pub fn new(type_: ServerType, version: &str) -> Self {
         ServerCommand {
+            type_,
+            version: String::from(version),
             java: String::from("java"),
-            jar: Path::new(jar).canonicalize().unwrap(),
-            config_dir: Path::new(config_dir).canonicalize().unwrap(),
-            world_dir: Path::new(world_dir).canonicalize().unwrap(),
+            jar: PathBuf::from("server.jar"),
+            config_dir: PathBuf::from("config"),
+            world_dir: PathBuf::from("worlds"),
+            backup_dir: PathBuf::from("backups"),
             xms: 1024,
             xmx: 2048,
-            child: None,
         }
     }
 
@@ -36,6 +56,27 @@ impl ServerCommand {
         self
     }
 
+    pub fn jar<T: AsRef<Path>>(mut self, path: T) -> Self {
+        self.jar = PathBuf::from(path.as_ref());
+        self
+    }
+
+    pub fn config<T: AsRef<Path>>(mut self, path: T) -> Self {
+        self.config_dir = PathBuf::from(path.as_ref());
+        self
+    }
+
+    pub fn world<T: AsRef<Path>>(mut self, path: T) -> Self {
+        self.world_dir = PathBuf::from(path.as_ref());
+        self
+    }
+
+    pub fn backup<T: AsRef<Path>>(mut self, path: T) -> Self {
+        self.backup_dir = PathBuf::from(path.as_ref());
+
+        self
+    }
+
     pub fn mem(mut self, xms: u32, xmx: u32) -> Self {
         self.xms = xms;
         self.xmx = xmx;
@@ -52,19 +93,32 @@ impl ServerCommand {
         Ok(())
     }
 
-    pub fn spawn(&mut self) -> std::io::Result<ServerProcess> {
+    pub fn spawn(self) -> std::io::Result<ServerProcess> {
+        // To avoid any issues, we use absolute paths for everything when spawning the process
+        let jar = self.jar.canonicalize()?;
+        let config_dir = self.config_dir.canonicalize()?;
+        let world_dir = self.world_dir.canonicalize()?;
+        let backup_dir = self.backup_dir.canonicalize()?;
+
         self.accept_eula()?;
 
         let child = Command::new(&self.java)
-            .current_dir(&self.config_dir)
+            .current_dir(&config_dir)
             .arg("-jar")
-            .arg(&self.jar)
+            .arg(&jar)
             .arg("--universe")
-            .arg(&self.world_dir)
+            .arg(&world_dir)
             .arg("--nogui")
             .stdin(Stdio::piped())
             .spawn()?;
 
-        Ok(ServerProcess::new(child))
+        Ok(ServerProcess::new(
+            self.type_,
+            self.version,
+            config_dir,
+            world_dir,
+            backup_dir,
+            child,
+        ))
     }
 }

src/server/mod.rs

@@ -1,5 +1,5 @@
 mod command;
 mod process;
 
-pub use command::ServerCommand;
+pub use command::{ServerCommand, ServerType};
 pub use process::ServerProcess;

src/server/process.rs

@@ -1,3 +1,4 @@
+use crate::server::ServerType;
 use flate2::write::GzEncoder;
 use flate2::Compression;
 use std::fs::File;
@@ -8,50 +9,91 @@ use std::process::Child;
 use std::process::{Command, Stdio};
 
 pub struct ServerProcess {
+    type_: ServerType,
+    version: String,
+    config_dir: PathBuf,
+    world_dir: PathBuf,
+    backup_dir: PathBuf,
     child: Child,
 }
 
 impl ServerProcess {
-    pub fn new(child: Child) -> ServerProcess {
-        ServerProcess { child }
+    pub fn new(
+        type_: ServerType,
+        version: String,
+        config_dir: PathBuf,
+        world_dir: PathBuf,
+        backup_dir: PathBuf,
+        child: Child,
+    ) -> ServerProcess {
+        ServerProcess {
+            type_,
+            version,
+            config_dir,
+            world_dir,
+            backup_dir,
+            child,
+        }
     }
 
-    pub fn send_command(&mut self, cmd: &str) {
+    pub fn send_command(&mut self, cmd: &str) -> std::io::Result<()> {
         match cmd.trim() {
-            "stop" | "exit" => self.stop(),
-            "backup" => self.backup(),
-            s => self.custom(s),
-        }
+            "stop" | "exit" => self.stop()?,
+            "backup" => self.backup()?,
+            s => self.custom(s)?,
         }
 
-    fn custom(&mut self, cmd: &str) {
-        let mut stdin = self.child.stdin.take().unwrap();
-        stdin
-            .write_all(format!("{}\n", cmd.trim()).as_bytes())
-            .unwrap();
-        stdin.flush().unwrap();
+        Ok(())
     }
 
-    pub fn stop(&mut self) {
-        self.custom("stop");
-        self.child.wait();
+    fn custom(&mut self, cmd: &str) -> std::io::Result<()> {
+        let mut stdin = self.child.stdin.as_ref().unwrap();
+        stdin.write_all(format!("{}\n", cmd.trim()).as_bytes())?;
+        stdin.flush()?;
+
+        Ok(())
     }
 
-    pub fn backup(&mut self) {
+    pub fn stop(&mut self) -> std::io::Result<()> {
+        self.custom("stop")?;
+        self.child.wait()?;
+
+        Ok(())
+    }
+
+    pub fn backup(&mut self) -> std::io::Result<()> {
         // Make sure the server isn't modifying the files during the backup
-        self.custom("save-off");
-        self.custom("save-all");
+        self.custom("save-off")?;
+        self.custom("save-all")?;
 
         // Create a gzip-compressed tarball of the worlds folder
         let filename = format!(
             "{}",
-            chrono::offset::Local::now().format("backups/%Y-%m-%d_%H-%M-%S.tar.gz")
+            chrono::offset::Local::now().format("%Y-%m-%d_%H-%M-%S.tar.gz")
         );
-        let tar_gz = std::fs::File::create(filename).unwrap();
+        let path = self.backup_dir.join(&filename);
+        let tar_gz = std::fs::File::create(path)?;
         let enc = GzEncoder::new(tar_gz, Compression::default());
         let mut tar = tar::Builder::new(enc);
-        tar.append_dir_all("worlds", "worlds").unwrap();
 
-        self.custom("save-on");
+        tar.append_dir_all("worlds", &self.world_dir)?;
+
+        // We don't store all files in the config, as this would include caches
+        tar.append_path_with_name(self.config_dir.join("server.properties"), "config/server.properties")?;
+
+
+        // We add a file to the backup describing for what version it was made
+        let info = format!("{} {}", self.type_, self.version);
+        let info_bytes = info.as_bytes();
+        let mut header = tar::Header::new_gnu();
+        header.set_size(info_bytes.len().try_into().unwrap());
+
+        tar.append_data(&mut header, "info.txt", info_bytes)?;
+
+        // tar.append_dir_all("config", &self.config_dir)?;
+        //
+        // Backup file gets finalized in the drop
+
+        self.custom("save-on")
     }
 }