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// Copyright 2018 Google LLC All Rights Reserved.
//
// 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 daemon
import (
"context"
"io"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
)
// ImageOption is an alias for Option.
// Deprecated: Use Option instead.
type ImageOption Option
// Option is a functional option for daemon operations.
type Option func(*options)
type options struct {
ctx context.Context
client Client
buffered bool
}
var defaultClient = func() (Client, error) {
return client.NewClientWithOpts(client.FromEnv)
}
func makeOptions(opts ...Option) (*options, error) {
o := &options{
buffered: true,
ctx: context.Background(),
}
for _, opt := range opts {
opt(o)
}
if o.client == nil {
client, err := defaultClient()
if err != nil {
return nil, err
}
o.client = client
}
o.client.NegotiateAPIVersion(o.ctx)
return o, nil
}
// WithBufferedOpener buffers the image.
func WithBufferedOpener() Option {
return func(o *options) {
o.buffered = true
}
}
// WithUnbufferedOpener streams the image to avoid buffering.
func WithUnbufferedOpener() Option {
return func(o *options) {
o.buffered = false
}
}
// WithClient is a functional option to allow injecting a docker client.
//
// By default, github.com/docker/docker/client.FromEnv is used.
func WithClient(client Client) Option {
return func(o *options) {
o.client = client
}
}
// WithContext is a functional option to pass through a context.Context.
//
// By default, context.Background() is used.
func WithContext(ctx context.Context) Option {
return func(o *options) {
o.ctx = ctx
}
}
// Client represents the subset of a docker client that the daemon
// package uses.
type Client interface {
NegotiateAPIVersion(ctx context.Context)
ImageSave(context.Context, []string) (io.ReadCloser, error)
ImageLoad(context.Context, io.Reader, bool) (types.ImageLoadResponse, error)
ImageTag(context.Context, string, string) error
ImageInspectWithRaw(context.Context, string) (types.ImageInspect, []byte, error)
}
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