1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/rust/embed-manifest/src/embed/error.rs b/third_party/rust/embed-manifest/src/embed/error.rs
new file mode 100644
index 0000000000..365d0525ed
--- /dev/null
+++ b/third_party/rust/embed-manifest/src/embed/error.rs
@@ -0,0 +1,57 @@
+//! Error handling for application manifest embedding.
+
+use std::fmt::{self, Display, Formatter};
+use std::io::{self, ErrorKind};
+
+/// The error type which is returned when application manifest embedding fails.
+#[derive(Debug)]
+pub struct Error {
+    repr: Repr,
+}
+
+#[derive(Debug)]
+enum Repr {
+    IoError(io::Error),
+    UnknownTarget,
+}
+
+impl Error {
+    pub(crate) fn unknown_target() -> Error {
+        Error {
+            repr: Repr::UnknownTarget,
+        }
+    }
+}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        match self.repr {
+            Repr::IoError(ref e) => write!(f, "I/O error: {}", e),
+            Repr::UnknownTarget => f.write_str("unknown target"),
+        }
+    }
+}
+
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self.repr {
+            Repr::IoError(ref e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Error { repr: Repr::IoError(e) }
+    }
+}
+
+impl From<Error> for io::Error {
+    fn from(e: Error) -> Self {
+        match e.repr {
+            Repr::IoError(ioe) => ioe,
+            _ => io::Error::new(ErrorKind::Other, e),
+        }
+    }
+}