go: return a bad magic error in check when parsing summary #1206
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jtbandes
approved these changes
Jul 31, 2024
eloff
reviewed
Aug 1, 2024
| @@ -83,7 +83,7 @@ func (it *indexedMessageIterator) parseSummarySection() error { | |||
| } | |||
| magic := buf[20:] | |||
| if !bytes.Equal(magic, Magic) { | |||
| return fmt.Errorf("not an MCAP file") | |||
| return &ErrBadMagic{location: magicLocationEnd, actual: magic} | |||
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Description
it's useful to be able to tell this error apart from errors that might result from i/o, but right now there is no simple way to determine this using
errors.Is. This PR gives the error a publicly known type, so that callers can check for it.