dotcloud/docker

package tarexport // import "github.com/docker/docker/image/tarexport"

import (
    "github.com/containerd/platforms"
    "github.com/docker/distribution"
    "github.com/docker/docker/api/types/events"
    "github.com/docker/docker/image"
    "github.com/docker/docker/layer"
    refstore "github.com/docker/docker/reference"
    ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)

const (
    manifestFileName           = "manifest.json"
    legacyLayerFileName        = "layer.tar"
    legacyConfigFileName       = "json"
    legacyRepositoriesFileName = "repositories"
)

type manifestItem struct {
    Config       string
    RepoTags     []string
    Layers       []string
    Parent       image.ID                                 `json:",omitempty"`
    LayerSources map[layer.DiffID]distribution.Descriptor `json:",omitempty"`
}

type tarexporter struct {
    is              image.Store
    lss             layer.Store
    rs              refstore.Store
    loggerImgEvent  LogImageEvent
    platform        *platforms.Platform
    platformMatcher platforms.Matcher
}

// LogImageEvent defines interface for event generation related to image tar(load and save) operations
type LogImageEvent interface {
    // LogImageEvent generates an event related to an image operation
    LogImageEvent(imageID, refName string, action events.Action)
}

// NewTarExporter returns new Exporter for tar packages
func NewTarExporter(is image.Store, lss layer.Store, rs refstore.Store, loggerImgEvent LogImageEvent, platform *ocispec.Platform) image.Exporter {
    l := &tarexporter{
        is:             is,
        lss:            lss,
        rs:             rs,
        loggerImgEvent: loggerImgEvent,
        platform:       platform,
    }
    if platform != nil {
        l.platformMatcher = platforms.OnlyStrict(*platform)
    }
    return l
}