77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
package zerr
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import (
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"io"
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"strconv"
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"strings"
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"github.com/pborman/indent"
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)
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// WriteBuilder writes the error to the builder.
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//
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// w is guaranteed to never return error because
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// the bottom most writer is a strings.Builder.
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func (er *Err) WriteBuilder(w io.Writer) {
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if len(er.errs) == 0 {
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_, _ = io.WriteString(w, "[nil]")
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return
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}
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var previous string
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if parent := er.sequence.Parent(); parent != nil {
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if err := parent.Error(); err != nil && !err.IsMulti() {
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previous = err.GetMessage()
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}
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}
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current := strings.TrimPrefix(er.message, previous)
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if current != "" {
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if previous != "" {
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_, _ = io.WriteString(w, ": ")
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}
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_, _ = io.WriteString(w, current)
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}
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if len(er.errs) == 1 {
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err := er.errs[0]
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if wb, ok := err.(interface{ WriteBuilder(io.Writer) }); ok {
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wb.WriteBuilder(w)
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return
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}
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_, _ = io.WriteString(w, ": ")
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_, _ = io.WriteString(w, err.Error())
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return
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}
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_, _ = io.WriteString(w, ":\n")
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w = indent.NewWriter(w, " ")
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for i, e := range er.errs {
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if i > 0 {
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_, _ = io.WriteString(w, "\n")
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}
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_, _ = io.WriteString(w, strconv.Itoa(i+1))
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_, _ = io.WriteString(w, ". ")
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if wb, ok := e.(interface{ WriteBuilder(io.Writer) }); ok {
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wb.WriteBuilder(w)
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continue
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}
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_, _ = io.WriteString(w, e.Error())
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_, _ = io.WriteString(w, "\n")
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}
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}
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func writeString(w io.Writer, s string) (n int64, err error) {
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n64, err := io.WriteString(w, s)
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return int64(n64), err
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}
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func writeByte(w io.Writer, b byte) (n int64, err error) {
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n64, err := w.Write([]byte{b})
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return int64(n64), err
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}
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func writeBytes(w io.Writer, b []byte) (n int64, err error) {
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n64, err := w.Write(b)
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return int64(n64), err
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}
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