func extractTarGz()

in internal/platform/embed.go [185:249]
61 lines of code
17 McCabe index (conditional complexity)

func extractTarGz(archivePath string, destPath string) (error, bool) {
	archiveFile, err := os.Open(archivePath)
	if err != nil {
		return err, true
	}
	defer func(archiveFile *os.File) {
		err := archiveFile.Close()
		if err != nil {
			log.Fatal(err)
		}
	}(archiveFile)

	gzipReader, err := gzip.NewReader(archiveFile)
	if err != nil {
		return err, true
	}
	defer func(gzipReader *gzip.Reader) {
		err := gzipReader.Close()
		if err != nil {
			log.Fatal(err)
		}
	}(gzipReader)

	tarReader := tar.NewReader(gzipReader)

	for {
		header, err := tarReader.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			return err, true
		}

		target := filepath.Join(destPath, header.Name)
		if !isInDirectory(destPath, target) {
			return fmt.Errorf("%s: illegal file path", target), true
		}
		switch header.Typeflag {
		case tar.TypeDir:
			if _, err := os.Stat(target); err != nil {
				if err = os.MkdirAll(target, 0755); err != nil {
					return err, true
				}
			}
		case tar.TypeReg:
			file, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
			if err != nil {
				return err, true
			}
			if _, err := io.Copy(file, tarReader); err != nil {
				err := file.Close()
				if err != nil {
					return err, true
				}
				return err, true
			}
			err = file.Close()
			if err != nil {
				return err, true
			}
		}
	}
	return nil, false
}