dotcloud/docker

package chrootarchive // import "github.com/docker/docker/pkg/chrootarchive"

import (
    "io"

    "github.com/docker/docker/pkg/archive"
)

// ApplyLayer parses a diff in the standard layer format from `layer`,
// and applies it to the directory `dest`. The stream `layer` can only be
// uncompressed.
// Returns the size in bytes of the contents of the layer.
func ApplyLayer(dest string, layer io.Reader) (size int64, err error) {
    return applyLayerHandler(dest, layer, &archive.TarOptions{}, true)
}

// ApplyUncompressedLayer parses a diff in the standard layer format from
// `layer`, and applies it to the directory `dest`. The stream `layer`
// can only be uncompressed.
// Returns the size in bytes of the contents of the layer.
func ApplyUncompressedLayer(dest string, layer io.Reader, options *archive.TarOptions) (int64, error) {
    return applyLayerHandler(dest, layer, options, false)
}