Motivation

• multi error is needed, currently, we just use lastErr ...
• we want to have handy methods to traverse the error chain
• categorize error source and types, i.e. standard library, third party, developer's fault (i.e. copy and pasted legacy code), runtime failure (network etc.)
• better integration with logging package, i.e. print stack when log an error
• not much updates on pkg/errors https://github.com/pkg/errors/commits/master

Ref

Wrap

• https://github.com/hashicorp/errwrap
• https://github.com/pkg/errors
• https://github.com/juju/errors
• https://github.com/go-errgo/errgo/tree/v1 used by juju?
• https://github.com/go-errors/errors used it when first start Ayi, then switched to pkg/errors

Multi error

• https://github.com/uber-go/multierr
• https://github.com/hashicorp/go-multierror

k8s

• https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/util/errors/errors.go
• https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/util/validation/field/errors.go