mirror of https://github.com/docker/buildx.git
126 lines
2.5 KiB
Go
126 lines
2.5 KiB
Go
package dockerutil
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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/docker/client"
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)
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// Client represents an active docker object.
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type Client struct {
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cli command.Cli
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featuresOnce sync.Once
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featuresCache map[Feature]bool
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}
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// NewClient initializes a new docker client.
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func NewClient(cli command.Cli) *Client {
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return &Client{cli: cli}
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}
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// API returns a new docker API client.
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func (c *Client) 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 NewClientAPI(c.cli, name)
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}
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// LoadImage imports an image to docker.
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func (c *Client) 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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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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handleErr := func(err error) {
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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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}
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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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handleErr(err)
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return
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}
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status = progress.ResetTime(status)
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if err := progress.Wrap("importing to docker", status.Write, func(l progress.SubLogger) error {
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return fromReader(l, resp.Body)
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}); err != nil {
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handleErr(err)
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}
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},
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done: done,
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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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func (c *Client) Features(ctx context.Context, name string) map[Feature]bool {
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c.featuresOnce.Do(func() {
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c.featuresCache = c.features(ctx, name)
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})
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return c.featuresCache
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}
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func (c *Client) features(ctx context.Context, name string) map[Feature]bool {
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features := make(map[Feature]bool)
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if dapi, err := c.API(name); err == nil {
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if info, err := dapi.Info(ctx); err == nil {
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for _, v := range info.DriverStatus {
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switch v[0] {
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case "driver-type":
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if v[1] == "io.containerd.snapshotter.v1" {
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features[OCIImporter] = true
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}
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}
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}
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}
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}
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return features
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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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}
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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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