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120 lines
2.6 KiB
Go
120 lines
2.6 KiB
Go
package storeutil
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import (
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"context"
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"io"
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"sync"
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"github.com/docker/buildx/util/progress"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/context/docker"
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"github.com/docker/docker/client"
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)
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// DockerClient represents an active docker object.
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type DockerClient struct {
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cli command.Cli
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}
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// NewDockerClient initializes a new docker client.
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func NewDockerClient(cli command.Cli) *DockerClient {
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return &DockerClient{cli: cli}
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}
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// API returns a new docker API client.
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func (c *DockerClient) API(name string) (client.APIClient, error) {
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if name == "" {
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name = c.cli.CurrentContext()
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}
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return ClientForEndpoint(c.cli, name)
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}
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// LoadImage imports an image to docker.
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func (c *DockerClient) LoadImage(ctx context.Context, name string, status progress.Writer) (io.WriteCloser, func(), error) {
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dapi, err := c.API(name)
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if err != nil {
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return nil, nil, err
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}
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pr, pw := io.Pipe()
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done := make(chan struct{})
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ctx, cancel := context.WithCancel(ctx)
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var w *waitingWriter
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w = &waitingWriter{
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PipeWriter: pw,
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f: func() {
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resp, err := dapi.ImageLoad(ctx, pr, false)
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defer close(done)
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if err != nil {
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pr.CloseWithError(err)
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w.mu.Lock()
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w.err = err
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w.mu.Unlock()
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return
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}
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prog := progress.WithPrefix(status, "", false)
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progress.FromReader(prog, "importing to docker", resp.Body)
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},
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done: done,
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cancel: cancel,
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}
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return w, func() {
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pr.Close()
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}, nil
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}
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type waitingWriter struct {
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*io.PipeWriter
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f func()
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once sync.Once
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mu sync.Mutex
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err error
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done chan struct{}
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cancel func()
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}
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func (w *waitingWriter) Write(dt []byte) (int, error) {
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w.once.Do(func() {
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go w.f()
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})
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return w.PipeWriter.Write(dt)
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}
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func (w *waitingWriter) Close() error {
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err := w.PipeWriter.Close()
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<-w.done
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if err == nil {
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w.mu.Lock()
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defer w.mu.Unlock()
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return w.err
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}
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return err
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}
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// ClientForEndpoint returns a docker client for an endpoint
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func ClientForEndpoint(dockerCli command.Cli, name string) (client.APIClient, error) {
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dem, err := GetDockerEndpoint(dockerCli, name)
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if err == nil && dem != nil {
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ep, err := docker.WithTLSData(dockerCli.ContextStore(), name, *dem)
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if err != nil {
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return nil, err
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}
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clientOpts, err := ep.ClientOpts()
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if err != nil {
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return nil, err
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}
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return client.NewClientWithOpts(append(clientOpts, client.WithAPIVersionNegotiation())...)
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}
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ep := docker.Endpoint{
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EndpointMeta: docker.EndpointMeta{
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Host: name,
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},
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}
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clientOpts, err := ep.ClientOpts()
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if err != nil {
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return nil, err
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}
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return client.NewClientWithOpts(append(clientOpts, client.WithAPIVersionNegotiation())...)
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}
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