feat: give more useful and specific error messages

1 files changed, 5 insertions, 4 deletions

diff --git a/src/config.rs b/src/config.rs
index 88c186b..1866971 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -41,9 +41,9 @@ pub struct Configuration {
 /// Errors from this module.
 #[derive(Debug, thiserror::Error)]
 pub enum ConfigurationError {
-    /// I/O error.
-    #[error(transparent)]
-    IoError(#[from] std::io::Error),
+    /// Error reading configuration file.
+    #[error("couldn't read configuration file {0}")]
+    ReadError(PathBuf, #[source] std::io::Error),
 
     /// YAML parsing error.
     #[error(transparent)]
@@ -55,7 +55,8 @@ impl Configuration {
     pub fn from_file(filename: &Path) -> Result<Self, ConfigurationError> {
         if filename.exists() {
             debug!("reading configuration file {}", filename.display());
-            let config = fs::read(filename)?;
+            let config = fs::read(filename)
+                .map_err(|err| ConfigurationError::ReadError(filename.to_path_buf(), err))?;
             let config: Configuration = serde_yaml::from_slice(&config)?;
             debug!("config: {:#?}", config);
             Ok(config)