refactor: extract ConfigParseError::IoError as an independent error type

Signed-off-by: Phoeniix Zhao <[email protected]>

utils/src/lib.rs

@@ -179,9 +179,15 @@ pub enum ConfigParseError {
     /// Invalid values
     #[error("Invalid Value: {0}")]
     InvalidValue(String),
-    /// Invalid config file path
-    #[error("Couldn't read file {0}")]
-    IoError(String, #[source] std::io::Error),
+}
+
+/// Config File Error
+#[derive(Debug, Error)]
+#[non_exhaustive]
+pub enum ConfigFileError {
+    /// Invalid number when parsing `Duration`
+    #[error("Couldn't read config file {0}")]
+    FileError(String, #[source] std::io::Error),
 }
 
 /// parse members from string like "node1=addr1,addr2,node2=add3,addr4,addr5,node3=addr6"

xline/src/main.rs

@@ -162,7 +162,7 @@ use utils::{
         RotationConfig, ServerTimeout, StorageConfig, TraceConfig, XlineServerConfig,
     },
     parse_batch_bytes, parse_duration, parse_log_level, parse_members, parse_rotation,
-    ConfigParseError,
+    ConfigFileError,
 };
 use xline::{server::XlineServer, storage::db::DB};
 
@@ -488,7 +488,7 @@ async fn main() -> Result<()> {
             env::var("XLINE_SERVER_CONFIG").unwrap_or_else(|_| "/etc/xline_server.conf".to_owned());
         let config_file = fs::read_to_string(&path)
             .await
-            .map_err(|err| ConfigParseError::IoError(path, err))?;
+            .map_err(|err| ConfigFileError::FileError(path, err))?;
         toml::from_str(&config_file)?
     } else {
         let server_args: ServerArgs = ServerArgs::parse();