Add ErrorExt::display_chain_with_msg

1 files changed, 14 insertions, 0 deletions

diff --git a/talpid-core/src/lib.rs b/talpid-core/src/lib.rs
index 1147e40fd6..8de9002c1a 100644
--- a/talpid-core/src/lib.rs
+++ b/talpid-core/src/lib.rs
@@ -62,7 +62,11 @@ mod linux;
 
 
 trait ErrorExt {
+    /// Creates a string representation of the entire error chain.
     fn display_chain(&self) -> String;
+
+    /// Like [`display_chain`] but with an extra message at the start of the chain
+    fn display_chain_with_msg(&self, msg: &str) -> String;
 }
 
 impl<E: std::error::Error> ErrorExt for E {
@@ -75,4 +79,14 @@ impl<E: std::error::Error> ErrorExt for E {
         }
         s
     }
+
+    fn display_chain_with_msg(&self, msg: &str) -> String {
+        let mut s = format!("Error: {}\nCaused by: {}", msg, self);
+        let mut source = self.source();
+        while let Some(error) = source {
+            s.push_str(&format!("\nCaused by: {}", error));
+            source = error.source();
+        }
+        s
+    }
 }