epub_builder::Error no longer available for use in next release.

[dieterplex]

Since 1e3af55, epub_builder::Error is no longer available for using in downstream project. Specifically mdbook-epub is using epub_builder::Error to define a transparent error variant of thiserror. Without that, it would need to introduce eyre as a dependency IIUC and have some changes to upgrade to next release.

Could you consider re-exporting eyre::Report as Error for compatibility? Or give guidance to migrate?

Edit: see also Eyre's doc

We recommend users do not re-export types from this library as part their own public API for libraries with external users.

[erikbrinkman]

You can always pin eyre to the same release as it is here, but I understand that's not an ideal solution 🤷

[dluschan]

Michael-F-Bryan/mdbook-epub#80

[blandger]

Agree with @dieterplex now eyre is leaking from epub-builder into another library (mdbook-epub). That was not an good solution, imho.

[vuhe]

Can error be converted to std::error::Error so that there is no need to leak the eyre, I use this to convert to anyhow:

use std::error::Error;

type EpubBuilderError = Arc<dyn Error + Send + Sync + 'static>;

pub trait IntoStdError<T> {
    fn into_std_error(self) -> Result<T, EpubBuilderError>;
}

impl<T> IntoStdError<T> for epub_builder::Result<T> {
    fn into_std_error(self) -> Result<T, EpubBuilderError> {
        match self {
            Ok(it) => Ok(it),
            Err(e) => {
                let err: Box<dyn Error + Send + Sync + 'static> = e.into();
                let err: Arc<dyn Error + Send + Sync + 'static> = Arc::from(err);
                Err(err)
            }
        }
    }
}