38 lines
837 B
Go
38 lines
837 B
Go
package proxy
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// ScopedError carries a stable error scope alongside a human-readable message.
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//
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// err := proxy.NewScopedError("proxy.config", "load failed", io.EOF)
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type ScopedError struct {
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Scope string
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Message string
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Cause error
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}
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// NewScopedError creates an error that keeps a greppable scope token in the failure path.
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//
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// err := proxy.NewScopedError("proxy.server", "listen failed", cause)
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func NewScopedError(scope, message string, cause error) error {
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return &ScopedError{
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Scope: scope,
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Message: message,
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Cause: cause,
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}
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}
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func (e *ScopedError) Error() string {
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if e == nil {
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return ""
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}
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if e.Cause == nil {
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return e.Scope + ": " + e.Message
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}
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return e.Scope + ": " + e.Message + ": " + e.Cause.Error()
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}
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func (e *ScopedError) Unwrap() error {
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if e == nil {
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return nil
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}
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return e.Cause
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}
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