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go prefixedwriter: fix short write error case #68

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go prefixedwriter: fix short write error case #68

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6 changes: 5 additions & 1 deletion clireporter/prefixedwriter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,10 @@ func (w *PrefixedWriter) Write(p []byte) (n int, err error) {
h.Write([]byte(w.Prefix))
c := colors[int(h.Sum32())%len(colors)]

// If we format p as a JSON, it's possible that the number of bytes can
// change.
// The writer expects us to return the original length of p.
origLen := len(p)
var jsonObj interface{}
err = json.Unmarshal([]byte(p), &jsonObj)
if err == nil {
Expand All @@ -106,7 +110,7 @@ func (w *PrefixedWriter) Write(p []byte) (n int, err error) {
}

_, err = w.Writer.Write([]byte(strings.Join(prefixed, "\n") + "\n"))
return len(p), err
return origLen, err
}

func leftPad(s string, l int) string {
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