package multierror
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// Append is a helper function that will append more errors
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// onto an Error in order to create a larger multi-error.
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//
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// If err is not a multierror.Error, then it will be turned into
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// one. If any of the errs are multierr.Error, they will be flattened
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// one level into err.
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func Append(err error, errs ...error) *Error {
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switch err := err.(type) {
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case *Error:
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// Typed nils can reach here, so initialize if we are nil
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if err == nil {
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err = new(Error)
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}
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// Go through each error and flatten
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for _, e := range errs {
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switch e := e.(type) {
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case *Error:
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if e != nil {
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err.Errors = append(err.Errors, e.Errors...)
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}
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default:
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if e != nil {
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err.Errors = append(err.Errors, e)
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}
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}
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}
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return err
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default:
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newErrs := make([]error, 0, len(errs)+1)
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if err != nil {
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newErrs = append(newErrs, err)
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}
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newErrs = append(newErrs, errs...)
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return Append(&Error{}, newErrs...)
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}
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}
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