Alessandro RosandGitHub
e7b811fdc0
this allows to check whether a new version is available without upgrading.
44 lines
696 B
Go
44 lines
696 B
Go
//go:build !windows
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package upgrade
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import (
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"archive/tar"
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"compress/gzip"
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"errors"
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"fmt"
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"io"
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)
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const extension = "tar.gz"
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func extractExecutable(r io.Reader) ([]byte, error) {
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gzReader, err := gzip.NewReader(r)
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if err != nil {
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return nil, err
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}
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defer gzReader.Close() //nolint:errcheck
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tarReader := tar.NewReader(gzReader)
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for {
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var header *tar.Header
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header, err = tarReader.Next()
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if err != nil {
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if errors.Is(err, io.EOF) {
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return nil, fmt.Errorf("executable not found")
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}
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return nil, err
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}
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if header.Name == executable {
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var buf []byte
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buf, err = io.ReadAll(tarReader)
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if err != nil {
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return nil, err
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}
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return buf, nil
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}
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}
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}
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