add lowercase + basic way to migrate config

docs/example_config.toml

@@ -2,6 +2,7 @@
 ascii = "stack"
 seperator = ": "
 modules = ["os", "desktop", "shell", "uptime"]
+lowercase = false
 
 [colours]
 primary = "\u001B[39m" # reset

src/config/config.rs

@@ -14,6 +14,7 @@ pub struct DisplayConfig {
     pub ascii: String,
     pub seperator: String,
     pub modules: Vec<String>,
+    pub lowercase: bool,
 }
 
 #[derive(Deserialize, Serialize)]
@@ -33,6 +34,7 @@ pub fn default() -> Config {
                 "shell".to_string(),
                 "uptime".to_string(),
             ],
+            lowercase: false,
         },
         colours: ColoursConfig {
             primary: "\x1B[39m".to_string(),

src/config/mod.rs

@@ -34,7 +34,17 @@ pub fn init_config() -> Result<bool, Box<dyn Error>> {
 
 pub fn read_config() -> Result<config::Config, Box<dyn Error>> {
     let file = format!("{}/config.toml", config_dir()?);
-    let contents = fs::read_to_string(file)?;
-    let cfg: config::Config = toml::from_str(contents.as_str())?;
-    Ok(cfg)
+    let contents = fs::read_to_string(&file)?;
+
+    match toml::from_str::<config::Config>(&contents) {
+        Ok(cfg) => Ok(cfg),
+        Err(_) => {
+            println!("[!] migrating config to latest version...");
+            let cfg = config::default();
+            let new_contents = toml::to_string(&cfg)?;
+            fs::write(&file, new_contents)?;
+            println!("[!] config migrated at: {file}");
+            Ok(cfg)
+        }
+    }
 }

src/main.rs

@@ -35,14 +35,18 @@ fn main() -> Result<(), Box<dyn Error>> {
             continue;
         }
 
-        let (key, value) = match module_name {
+        let (key, mut value) = match module_name {
             "os" => ("OS", data::os::distro()),
             "desktop" => ("DE", data::desktop::desktop()),
             "shell" => ("SH", data::shell::shell()),
             "uptime" => ("UP", data::uptime::uptime()),
             _ => return Err(format!("unknown module '{}'", module_name).into()),
         };
 
+        if cfg.display.lowercase {
+            value = value.to_lowercase();
+        }
+
         println!(
             "{line:max_length$}  {accent}{key}{primary}{seperator}{value}{RESET}",
             accent = cfg.colours.accent,