feat!: [#878] make log_level config value mandatory

Althought, it has a default value `info` so you can omit it in the TOML
config file.

packages/configuration/src/v1/logging.rs

@@ -8,7 +8,7 @@ pub struct Logging {
     /// Logging level. Possible values are: `Off`, `Error`, `Warn`, `Info`,
     /// `Debug` and `Trace`. Default is `Info`.
     #[serde(default = "Logging::default_log_level")]
-    pub log_level: Option<LogLevel>,
+    pub log_level: LogLevel,
 }
 
 impl Default for Logging {
@@ -20,8 +20,7 @@ impl Default for Logging {
 }
 
 impl Logging {
-    #[allow(clippy::unnecessary_wraps)]
-    fn default_log_level() -> Option<LogLevel> {
-        Some(LogLevel::Info)
+    fn default_log_level() -> LogLevel {
+        LogLevel::Info
     }
 }

packages/test-helpers/src/configuration.rs

@@ -29,7 +29,7 @@ pub fn ephemeral() -> Configuration {
 
     let mut config = Configuration::default();
 
-    config.logging.log_level = Some(LogLevel::Off); // Change to `debug` for tests debugging
+    config.logging.log_level = LogLevel::Off; // Change to `debug` for tests debugging
 
     // Ephemeral socket address for API
     let api_port = 0u16;

src/bootstrap/logging.rs

@@ -20,7 +20,7 @@ static INIT: Once = Once::new();
 
 /// It redirects the log info to the standard output with the log level defined in the configuration
 pub fn setup(cfg: &Configuration) {
-    let tracing_level = config_level_or_default(&cfg.logging.log_level);
+    let tracing_level = map_to_tracing_level_filter(&cfg.logging.log_level);
 
     if tracing_level == LevelFilter::OFF {
         return;
@@ -31,17 +31,14 @@ pub fn setup(cfg: &Configuration) {
     });
 }
 
-fn config_level_or_default(log_level: &Option<LogLevel>) -> LevelFilter {
+fn map_to_tracing_level_filter(log_level: &LogLevel) -> LevelFilter {
     match log_level {
-        None => LevelFilter::INFO,
-        Some(level) => match level {
-            LogLevel::Off => LevelFilter::OFF,
-            LogLevel::Error => LevelFilter::ERROR,
-            LogLevel::Warn => LevelFilter::WARN,
-            LogLevel::Info => LevelFilter::INFO,
-            LogLevel::Debug => LevelFilter::DEBUG,
-            LogLevel::Trace => LevelFilter::TRACE,
-        },
+        LogLevel::Off => LevelFilter::OFF,
+        LogLevel::Error => LevelFilter::ERROR,
+        LogLevel::Warn => LevelFilter::WARN,
+        LogLevel::Info => LevelFilter::INFO,
+        LogLevel::Debug => LevelFilter::DEBUG,
+        LogLevel::Trace => LevelFilter::TRACE,
     }
 }