preview v3

1 files changed, 43 insertions, 0 deletions

diff --git a/src/fail.rs b/src/fail.rs
new file mode 100644
index 0000000..791435b
--- /dev/null
+++ b/src/fail.rs
@@ -0,0 +1,43 @@
+use failure;
+
+pub type HResult<T> = Result<T, HError>;
+
+#[derive(Fail, Debug)]
+pub enum HError {
+    #[fail(display = "IO error: {}", error)]
+    IoError{#[cause] error: std::io::Error},
+    #[fail(display = "Mutex failed")]
+    MutexError,
+    #[fail(display = "Channel failed: {}", error)]
+    ChannelTryRecvError{#[cause] error: std::sync::mpsc::TryRecvError},
+    #[fail(display = "Previewer failed on file: {}", file)]
+    PreviewFailed{file: String},
+    #[fail(display = "StalePreviewer for file: {}", file)]
+    StalePreviewError{file: String},
+    #[fail(display = "Failed: {}", error)]
+    Error{#[cause] error: failure::Error }
+}
+
+impl From<std::io::Error> for HError {
+    fn from(error: std::io::Error) -> Self {
+        HError::IoError { error: error }
+    }
+}
+
+impl From<failure::Error> for HError {
+    fn from(error: failure::Error) -> Self {
+        HError::Error { error: error }
+    }
+}
+
+impl From<std::sync::mpsc::TryRecvError> for HError {
+    fn from(error: std::sync::mpsc::TryRecvError) -> Self {
+        HError::ChannelTryRecvError { error: error }
+    }
+}
+
+impl<T> From<std::sync::PoisonError<T>> for HError {
+    fn from(_: std::sync::PoisonError<T>) -> Self {
+        HError::MutexError
+    }
+}