55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
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package libkpod
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import (
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"github.com/containers/storage/pkg/archive"
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"github.com/kubernetes-incubator/cri-o/libkpod/image"
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"github.com/kubernetes-incubator/cri-o/libkpod/layer"
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"github.com/pkg/errors"
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)
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// GetDiff returns the differences betwen the two images, layers, or containers
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func (c *ContainerServer) GetDiff(from, to string) ([]archive.Change, error) {
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toLayer, err := c.getLayerID(to)
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if err != nil {
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return nil, err
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}
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fromLayer := ""
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if from != "" {
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fromLayer, err = c.getLayerID(from)
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if err != nil {
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return nil, err
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}
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}
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return c.Store().Changes(fromLayer, toLayer)
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}
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// GetLayerID gets a full layer id given a full or partial id
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// If the id matches a container or image, the id of the top layer is returned
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// If the id matches a layer, the top layer id is returned
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func (c *ContainerServer) getLayerID(id string) (string, error) {
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var toLayer string
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toImage, err := image.FindImage(c.store, id)
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if err != nil {
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toCtr, err := c.store.Container(id)
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if err != nil {
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toLayer, err = layer.FullID(c.store, id)
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if err != nil {
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return "", errors.Errorf("layer, image, or container %s does not exist", id)
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}
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} else {
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toLayer = toCtr.LayerID
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}
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} else {
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toLayer = toImage.TopLayer
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}
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return toLayer, nil
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}
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func (c *ContainerServer) getLayerParent(layerID string) (string, error) {
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layer, err := c.store.Layer(layerID)
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if err != nil {
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return "", err
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}
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return layer.Parent, nil
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}
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