feat: give more useful and specific error messages

1 files changed, 6 insertions, 5 deletions

diff --git a/src/spec.rs b/src/spec.rs
index b9828e9..a1d1c2f 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -216,14 +216,14 @@ pub enum SpecificationError {
     #[error("No SSH authorized keys specified for {0} and no default configured")]
     NoAuthorizedKeys(String),
 
+    /// Error reading specification file.
+    #[error("Couldn't read specification file {0}")]
+    Read(PathBuf, #[source] std::io::Error),
+
     /// Error reading SSH public key.
     #[error("Failed to read SSH public key file {0}")]
     SshKeyRead(PathBuf, #[source] std::io::Error),
 
-    /// I/O error.
-    #[error(transparent)]
-    IoError(#[from] std::io::Error),
-
     /// Error parsing string as UTF8.
     #[error(transparent)]
     FromUtf8Error(#[from] std::string::FromUtf8Error),
@@ -247,7 +247,8 @@ impl Specification {
         filename: &Path,
     ) -> Result<Vec<Specification>, SpecificationError> {
         debug!("reading specification from {}", filename.display());
-        let spec = fs::read(filename)?;
+        let spec = fs::read(filename)
+            .map_err(|err| SpecificationError::Read(filename.to_path_buf(), err))?;
         let input: HashMap<String, OneVmInputSpecification> = serde_yaml::from_slice(&spec)?;
         debug!("specification as read from file: {:#?}", input);