3d15bc571b
Update the vendored copy of github.com/containers/image to revision efae29995d4846ffa6163eb4d466fd61bda43aae. Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
57 lines
2 KiB
Go
57 lines
2 KiB
Go
package archive
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/containers/image/docker/tarfile"
|
|
"github.com/containers/image/types"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
type archiveImageDestination struct {
|
|
*tarfile.Destination // Implements most of types.ImageDestination
|
|
ref archiveReference
|
|
writer io.Closer
|
|
}
|
|
|
|
func newImageDestination(ctx *types.SystemContext, ref archiveReference) (types.ImageDestination, error) {
|
|
if ref.destinationRef == nil {
|
|
return nil, errors.Errorf("docker-archive: destination reference not supplied (must be of form <path>:<reference:tag>)")
|
|
}
|
|
fh, err := os.OpenFile(ref.path, os.O_WRONLY|os.O_EXCL|os.O_CREATE, 0644)
|
|
if err != nil {
|
|
// FIXME: It should be possible to modify archives, but the only really
|
|
// sane way of doing it is to create a copy of the image, modify
|
|
// it and then do a rename(2).
|
|
if os.IsExist(err) {
|
|
err = errors.New("docker-archive doesn't support modifying existing images")
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
return &archiveImageDestination{
|
|
Destination: tarfile.NewDestination(fh, ref.destinationRef),
|
|
ref: ref,
|
|
writer: fh,
|
|
}, nil
|
|
}
|
|
|
|
// Reference returns the reference used to set up this destination. Note that this should directly correspond to user's intent,
|
|
// e.g. it should use the public hostname instead of the result of resolving CNAMEs or following redirects.
|
|
func (d *archiveImageDestination) Reference() types.ImageReference {
|
|
return d.ref
|
|
}
|
|
|
|
// Close removes resources associated with an initialized ImageDestination, if any.
|
|
func (d *archiveImageDestination) Close() error {
|
|
return d.writer.Close()
|
|
}
|
|
|
|
// Commit marks the process of storing the image as successful and asks for the image to be persisted.
|
|
// WARNING: This does not have any transactional semantics:
|
|
// - Uploaded data MAY be visible to others before Commit() is called
|
|
// - Uploaded data MAY be removed or MAY remain around if Close() is called without Commit() (i.e. rollback is allowed but not guaranteed)
|
|
func (d *archiveImageDestination) Commit() error {
|
|
return d.Destination.Commit()
|
|
}
|