bindings: Example chained error for parsing bindings

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

2 files changed, 7 insertions, 1 deletions

diff --git a/src/bindings.rs b/src/bindings.rs
index 5909316..4447c66 100644
--- a/src/bindings.rs
+++ b/src/bindings.rs
@@ -513,7 +513,9 @@ impl Bindings {
         let yaml = resource::read_as_string(filename.as_ref())
             .map_err(|e| SubplotError::BindingsFileNotFound(filename.as_ref().into(), e))?;
         event!(Level::TRACE, "Loaded file content");
-        self.add_from_yaml(&yaml)?;
+        self.add_from_yaml(&yaml).map_err(|e| {
+            SubplotError::BindingFileParseError(filename.as_ref().to_owned(), Box::new(e))
+        })?;
         Ok(())
     }
 
diff --git a/src/error.rs b/src/error.rs
index 532714b..92e8edb 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -36,6 +36,10 @@ pub enum SubplotError {
     #[error("simple pattern contains regex metacharacters: {0}")]
     SimplePatternHasMetaCharacters(String),
 
+    /// Error while parsing a bindings file
+    #[error("binding file failed to parse: {0}")]
+    BindingFileParseError(PathBuf, #[source] Box<SubplotError>),
+
     /// Scenario step does not match a known binding
     ///
     /// This may be due to the binding missing entirely, or that the