Add auto generation of settings.toml if it does not already exist

Former-commit-id: 941b81a8faeff89096256666c56ae472d9b569d5

.gitignore

@@ -17,6 +17,7 @@
 # Veloren
 **/server_conf.toml
 **/keybinds.toml
+**/settings.toml
 assets/voxygen
 *.rar
 

voxygen/Settings.toml

@@ -1,17 +0,0 @@
-[controls]
-toggle_cursor = "tab"
-escape = "escape"
-enter = "return"
-move_forward = "w"
-move_left = "a"
-move_back = "s"
-move_right = "d"
-map = "m"
-bag = "b"
-quest_log = "l"
-character_window = "c"
-social = "o"
-spellbook = "p"
-settings = "n"
-help = "f1"
-interface = "f2"

voxygen/src/main.rs

@@ -77,7 +77,11 @@ fn main() {
     // Set up the global state
     let settings = match Settings::load() {
         Ok(settings) => settings,
-        Err(err) => Settings::default(),
+        Err(err) => {
+            let settings = Settings::default();
+            settings.save_to_file();
+            settings
+        },
     };
     let window = Window::new(&settings).expect("Failed to create window");
 

voxygen/src/settings.rs

@@ -3,8 +3,10 @@ use config::{
     ConfigError,
 };
 use serde_derive::{Serialize, Deserialize};
-
 use glutin::VirtualKeyCode;
+use toml;
+use std::fs::File;
+use std::io::prelude::*;
 
 /// Settings contains everything that can be configured in the Settings.toml file
 #[derive(Clone, Debug, Serialize, Deserialize)]
@@ -56,9 +58,17 @@ impl Settings {
             },
         }
     }
+
     pub fn load() -> Result<Self, ConfigError> {
         let mut config = Config::new();
-        config.merge(config::File::with_name("Settings"))?;
+        config.merge(config::File::with_name("settings"))?;
         config.try_into()
     }
+
+    pub fn save_to_file(&self) -> std::io::Result<()> {
+        let mut config_file = File::create("settings.toml")?;
+        let s: &str = &toml::to_string_pretty(self).unwrap();
+        config_file.write_all(s.as_bytes()).unwrap();
+        Ok(())
+    }
 }