improve errors for IO

src/config.rs

@@ -117,9 +117,15 @@ impl Config {
         let path: PathBuf = path.as_ref().into();
 
         let mut contents = String::new();
-        let mut file = File::open(&path).map_err(|_| FileNotFound(path.clone()))?;
+        let mut file = File::open(&path).map_err(|e| CouldntReadConfigFile {
+            path: path.clone(),
+            error: e,
+        })?;
 
-        file.read_to_string(&mut contents).map_err(|_| CouldntRead(path.clone()))?;
+        file.read_to_string(&mut contents).map_err(|e| CouldntReadConfigFile {
+            path: path.clone(),
+            error: e,
+        })?;
 
         serde_yaml::from_str(&contents).map_err(|error| YamlError {
             path, error
@@ -130,9 +136,15 @@ impl Config {
         let path: PathBuf = path.as_ref().into();
 
         let mut contents = String::new();
-        let mut file = File::open(&path).map_err(|_| FileNotFound(path.clone()))?;
+        let mut file = File::open(&path).map_err(|e| CouldntReadConfigFile {
+            path: path.clone(),
+            error: e,
+        })?;
 
-        file.read_to_string(&mut contents).map_err(|_| CouldntRead(path.clone()))?;
+        file.read_to_string(&mut contents).map_err(|e| CouldntReadConfigFile {
+            path: path.clone(),
+            error: e,
+        })?;
 
         toml::from_str(&contents).map_err(|error| TomlError {
             path, error

src/error.rs

@@ -1,5 +1,6 @@
 use std::result;
 use std::path::PathBuf;
+use std::io;
 
 use thiserror::Error;
 use chrono::NaiveDateTime;
@@ -15,11 +16,17 @@ pub enum Error {
     #[error("Could not find home directory or a place where configuration can be read an written :(")]
     NoHomeDir,
 
-    #[error("The file {0} was not found")]
-    FileNotFound(PathBuf),
+    #[error("Could not read the config file at
 
-    #[error("Error reading the file: {0}")]
-    CouldntRead(PathBuf),
+{path}
+
+with error:
+
+{error}")]
+    CouldntReadConfigFile {
+        path: PathBuf,
+        error: io::Error,
+    },
 
     #[error("Couldn't parse toml file at: {path}\nwith error: {error}")]
     TomlError{ path: PathBuf, error: toml::de::Error},