func (s Fetcher) GetStemcell(deploymentManifest bideplmanifest.Manifest, stage biui.Stage) (ExtractedStemcell, error) {
stemcell, err := deploymentManifest.Stemcell(deploymentManifest.JobName())
if err != nil {
return nil, err
}
stemcellTarballPath, err := s.TarballProvider.Get(stemcell, stage)
if err != nil {
return nil, err
}
var extractedStemcell ExtractedStemcell
err = stage.Perform("Validating stemcell", func() error {
extractedStemcell, err = s.StemcellExtractor.Extract(stemcellTarballPath)
if err != nil {
return bosherr.WrapErrorf(err, "Extracting stemcell from '%s'", stemcellTarballPath)
}
return nil
})
if err != nil {
return nil, err
}
return extractedStemcell, nil
}
