Allow overwriting symlinks#26
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When extracting regular files, the file is opened for writing with os.O_TRUNC, making it suitable to extract over an existing file. This allows updating a local copy from an updated archive by extracting over it. If a link is added to the archive though, the second time it's extracted, an error occurs since os.Link and os.Symlink will not overwrite. This removes any file currently in place before attempting to write a link.
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When extracting regular files, the file is opened for writing with
os.O_TRUNC, making it suitable to extract over an existing file. This allows updating a local copy from an updated archive by extracting over it. If a link is added to the archive though, the second time it's extracted, an error occurs sinceos.Linkandos.Symlinkwill not overwrite. This removes any file currently in place before attempting to write a link.