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package storage
import (
"context"
"path"
dcontext "github.com/docker/distribution/context"
"github.com/docker/distribution/registry/storage/driver"
"github.com/opencontainers/go-digest"
)
// vacuum contains functions for cleaning up repositories and blobs
// These functions will only reliably work on strongly consistent
// storage systems.
// https://en.wikipedia.org/wiki/Consistency_model
// NewVacuum creates a new Vacuum
func NewVacuum(ctx context.Context, driver driver.StorageDriver) Vacuum {
return Vacuum{
ctx: ctx,
driver: driver,
}
}
// Vacuum removes content from the filesystem
type Vacuum struct {
driver driver.StorageDriver
ctx context.Context
}
// RemoveBlob removes a blob from the filesystem
func (v Vacuum) RemoveBlob(dgst string) error {
d, err := digest.Parse(dgst)
if err != nil {
return err
}
blobPath, err := pathFor(blobPathSpec{digest: d})
if err != nil {
return err
}
dcontext.GetLogger(v.ctx).Infof("Deleting blob: %s", blobPath)
err = v.driver.Delete(v.ctx, blobPath)
if err != nil {
return err
}
return nil
}
// RemoveManifest removes a manifest from the filesystem
func (v Vacuum) RemoveManifest(name string, dgst digest.Digest, tags []string) error {
// remove a tag manifest reference, in case of not found continue to next one
for _, tag := range tags {
tagsPath, err := pathFor(manifestTagIndexEntryPathSpec{name: name, revision: dgst, tag: tag})
if err != nil {
return err
}
_, err = v.driver.Stat(v.ctx, tagsPath)
if err != nil {
switch err := err.(type) {
case driver.PathNotFoundError:
continue
default:
return err
}
}
dcontext.GetLogger(v.ctx).Infof("deleting manifest tag reference: %s", tagsPath)
err = v.driver.Delete(v.ctx, tagsPath)
if err != nil {
return err
}
}
manifestPath, err := pathFor(manifestRevisionPathSpec{name: name, revision: dgst})
if err != nil {
return err
}
dcontext.GetLogger(v.ctx).Infof("deleting manifest: %s", manifestPath)
return v.driver.Delete(v.ctx, manifestPath)
}
// RemoveRepository removes a repository directory from the
// filesystem
func (v Vacuum) RemoveRepository(repoName string) error {
rootForRepository, err := pathFor(repositoriesRootPathSpec{})
if err != nil {
return err
}
repoDir := path.Join(rootForRepository, repoName)
dcontext.GetLogger(v.ctx).Infof("Deleting repo: %s", repoDir)
err = v.driver.Delete(v.ctx, repoDir)
if err != nil {
return err
}
return nil
}
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