improved some errors

src/fomod.rs

@@ -2,9 +2,10 @@
 // https://github.com/luctius/fomod/
 // Original license: MIT / Apache-2.0
 
-use std::{error::Error, fs, path::Path};
+use std::{fs, io, path::Path};
 
 use serde::{Deserialize, Serialize};
+use thiserror::Error;
 
 #[derive(Debug, Deserialize, PartialEq)]
 pub struct Info {
@@ -22,6 +23,15 @@ pub struct Info {
     pub category_id: Option<usize>,
 }
 
+impl Info {
+    pub fn load_from_file(path: impl AsRef<Path>) -> Result<Self, FOModError> {
+        let data = fs::read_to_string(path)?;
+        let config = quick_xml::de::from_str(&data)?;
+
+        Ok(config)
+    }
+}
+
 #[derive(Debug, Deserialize, PartialEq)]
 pub struct Config {
     #[serde(rename = "moduleName")]
@@ -44,7 +54,7 @@ pub struct Config {
 }
 
 impl Config {
-    pub fn load_from_file(path: impl AsRef<Path>) -> Result<Self, Box<dyn Error>> {
+    pub fn load_from_file(path: impl AsRef<Path>) -> Result<Self, FOModError> {
         let data = fs::read_to_string(path)?;
         let config = quick_xml::de::from_str(&data)?;
 
@@ -52,6 +62,15 @@ impl Config {
     }
 }
 
+#[derive(Error, Debug)]
+pub enum FOModError {
+    #[error("Failed to read file")]
+    Io(#[from] io::Error),
+
+    #[error("Failed to parse config")]
+    Parse(#[from] quick_xml::de::DeError),
+}
+
 #[derive(
     Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, PartialOrd, Ord, Hash, Default,
 )]