b763777288
Remove combined interface and split implementations. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package rootfs
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/containerd/containerd/diff"
|
|
"github.com/containerd/containerd/mount"
|
|
"github.com/containerd/containerd/snapshots"
|
|
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
// CreateDiff creates a layer diff for the given snapshot identifier from the
|
|
// parent of the snapshot. A content ref is provided to track the progress of
|
|
// the content creation and the provided snapshotter and mount differ are used
|
|
// for calculating the diff. The descriptor for the layer diff is returned.
|
|
func CreateDiff(ctx context.Context, snapshotID string, sn snapshots.Snapshotter, d diff.Comparer, opts ...diff.Opt) (ocispec.Descriptor, error) {
|
|
info, err := sn.Stat(ctx, snapshotID)
|
|
if err != nil {
|
|
return ocispec.Descriptor{}, err
|
|
}
|
|
|
|
lowerKey := fmt.Sprintf("%s-parent-view", info.Parent)
|
|
lower, err := sn.View(ctx, lowerKey, info.Parent)
|
|
if err != nil {
|
|
return ocispec.Descriptor{}, err
|
|
}
|
|
defer sn.Remove(ctx, lowerKey)
|
|
|
|
var upper []mount.Mount
|
|
if info.Kind == snapshots.KindActive {
|
|
upper, err = sn.Mounts(ctx, snapshotID)
|
|
if err != nil {
|
|
return ocispec.Descriptor{}, err
|
|
}
|
|
} else {
|
|
upperKey := fmt.Sprintf("%s-view", snapshotID)
|
|
upper, err = sn.View(ctx, upperKey, snapshotID)
|
|
if err != nil {
|
|
return ocispec.Descriptor{}, err
|
|
}
|
|
defer sn.Remove(ctx, upperKey)
|
|
}
|
|
|
|
return d.Compare(ctx, lower, upper, opts...)
|
|
}
|