feat(errors): add errors module

src/errors.rs

@@ -0,0 +1,33 @@
+use std::io;
+
+use chownr;
+use failure::Fail;
+use serde_json;
+
+#[derive(Fail, Debug)]
+pub enum Error {
+    #[fail(display = "{}", _0)]
+    Io(#[fail(cause)] io::Error),
+    #[fail(display = "{}", _0)]
+    Chownr(#[fail(cause)] chownr::Error),
+    #[fail(display = "{}", _0)]
+    SerdeJson(#[fail(cause)] serde_json::error::Error),
+}
+
+impl From<std::io::Error> for Error {
+    fn from(error: std::io::Error) -> Self {
+        Error::Io(error)
+    }
+}
+
+impl From<chownr::Error> for Error {
+    fn from(error: chownr::Error) -> Self {
+        Error::Chownr(error)
+    }
+}
+
+impl From<serde_json::error::Error> for Error {
+    fn from(error: serde_json::error::Error) -> Self {
+        Error::SerdeJson(error)
+    }
+}