/
containerengine.go
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/
containerengine.go
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// Copyright 2016 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package engine
import (
"github.com/spf13/cobra"
)
// layersOption specifies an option to the RetrieveTorrents call on whether to download
// all layers (even if already present within the engine) or just those missing.
type layersOption int
const (
// allLayers specifies that torrents should be returned for all layers, regardless of
// whether they are present within the container engine's layer store.
AllLayers layersOption = iota
// missingLayers specifies that torrents should be returned for only those layers missing
// within the container engine's layer store.
MissingLayers
)
// ContainerEngine represents a container engine (e.g. Docker or rkt) with which quayctl
// can interact.
type ContainerEngine interface {
// Name is a single identifier for the engine, used as the first parameter
// on the quayctl command line.
Name() string
// Title is a human-readable title for the engine.
Title() string
// TorrentHandler returns a handler for interacting with the `torrent pull` command.
TorrentHandler() engineTorrentHandler
}
// engineTorrentHandler represents the handling of the `torrent pull` command for a specific
// container engine.
type engineTorrentHandler interface {
// DecorateCommand is called to decorate the `torrent pull` command with any custom flags
// needed by this container engine.
DecorateCommand(command *cobra.Command)
// RetrieveTorrents retrieves all the torrents to be downloaded for the container image.
RetrieveTorrents(image string, insecureFlag bool, option layersOption) ([]torrentInfo, interface{}, error)
// LoadImage performs the loading of the downloaded container image into the container
// engine.
LoadImage(image string, downloadInfo downloadTorrentInfo, ctx interface{}) error
}