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fetcher.go
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fetcher.go
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package release
import (
"fmt"
"github.com/cloudfoundry/bosh-init/installation/tarball"
bosherr "github.com/cloudfoundry/bosh-init/internal/github.com/cloudfoundry/bosh-utils/errors"
"github.com/cloudfoundry/bosh-init/release/manifest"
"github.com/cloudfoundry/bosh-init/ui"
)
type Fetcher struct {
tarballProvider tarball.Provider
releaseExtractor Extractor
releaseManager Manager
}
func NewFetcher(tarballProvider tarball.Provider, releaseExtractor Extractor, releaseManager Manager) Fetcher {
return Fetcher{
tarballProvider: tarballProvider,
releaseExtractor: releaseExtractor,
releaseManager: releaseManager,
}
}
func (f Fetcher) DownloadAndExtract(releaseRef manifest.ReleaseRef, stage ui.Stage) error {
releasePath, err := f.tarballProvider.Get(releaseRef, stage)
if err != nil {
return err
}
err = stage.Perform(fmt.Sprintf("Validating release '%s'", releaseRef.Name), func() error {
release, err := f.releaseExtractor.Extract(releasePath)
if err != nil {
return bosherr.WrapErrorf(err, "Extracting release '%s'", releasePath)
}
if release.Name() != releaseRef.Name {
return bosherr.Errorf("Release name '%s' does not match the name in release tarball '%s'", releaseRef.Name, release.Name())
}
f.releaseManager.Add(release)
return nil
})
return err
}