Use thiserror and anyhow for command-level error types

src/cli/doc.rs

@@ -1,26 +1,4 @@
-use opener::{open, OpenError};
-use snafu::Snafu;
-
-#[derive(Debug, Snafu)]
-pub struct DocError(Error);
-
-#[derive(Debug, Snafu)]
-enum Error {
-    Open { source: OpenError },
-}
-
-impl From<OpenError> for Error {
-    fn from(source: OpenError) -> Self {
-        Error::Open { source }
-    }
-}
-
-pub fn doc() -> Result<(), DocError> {
-    doc_inner()?;
-    Ok(())
-}
-
-fn doc_inner() -> Result<(), Error> {
-    open("https://rojo.space/docs")?;
+pub fn doc() -> Result<(), anyhow::Error> {
+    opener::open("https://rojo.space/docs")?;
     Ok(())
 }