package main

import (
    "github.com/docker/docker/image"
    "os"
    "io/ioutil"
    "runtime"
    "github.com/docker/docker/layer"
    "fmt"
)


type mockLayerGetReleaser struct{}

func (ls *mockLayerGetReleaser) Get(layer.ChainID) (layer.Layer, error) {
        return nil, nil
}

func (ls *mockLayerGetReleaser) Release(layer.Layer) ([]layer.Metadata, error) {
        return nil, nil
}

func main(){
    tmpdir, err := ioutil.TempDir("", "images-fs-store")
    defer os.RemoveAll(tmpdir)
    if err != nil {
        fmt.Print(err)
        os.Exit(1)
    }
    fsBackend, err := image.NewFSStoreBackend(tmpdir)
    if err != nil {
        fmt.Print(err)
        os.Exit(1)
    }
    mlgrMap := make(map[string]image.LayerGetReleaser)
    mlgrMap[runtime.GOOS] = &mockLayerGetReleaser{}
    store, err := image.NewImageStore(fsBackend, mlgrMap)
    if err != nil {
        fmt.Print(err)
        os.Exit(1)
    }
    _, err = store.Create([]byte(`{}`))
    if err != nil {
        fmt.Print(err)
        os.Exit(1)
    }
}