dockerutil pkg to manage docker api client and context
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>pull/1430/head
CrazyMax
2 years ago
parent
47cf72b8ba
commit
63073b65c0
@ -0,0 +1,45 @@
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package dockerutil
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import (
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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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// ClientAPI represents an active docker API object.
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type ClientAPI struct {
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client.APIClient
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}
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func NewClientAPI(cli command.Cli, ep string) (*ClientAPI, error) {
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ca := &ClientAPI{}
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var dep docker.Endpoint
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dem, err := GetDockerEndpoint(cli, ep)
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if err != nil {
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return nil, err
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} else if dem != nil {
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dep, err = docker.WithTLSData(cli.ContextStore(), ep, *dem)
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if err != nil {
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return nil, err
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}
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} else {
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dep = docker.Endpoint{
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EndpointMeta: docker.EndpointMeta{
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Host: ep,
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},
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}
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}
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clientOpts, err := dep.ClientOpts()
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if err != nil {
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return nil, err
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}
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ca.APIClient, err = client.NewClientWithOpts(clientOpts...)
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if err != nil {
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return nil, err
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}
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return ca, nil
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}
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@ -0,0 +1,92 @@
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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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}
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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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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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@ -0,0 +1,40 @@
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package dockerutil
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import (
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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/pkg/errors"
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)
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// GetDockerEndpoint returns docker endpoint meta for given context
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func GetDockerEndpoint(dockerCli command.Cli, name string) (*docker.EndpointMeta, error) {
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list, err := dockerCli.ContextStore().List()
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if err != nil {
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return nil, err
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}
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for _, l := range list {
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if l.Name == name {
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epm, err := docker.EndpointFromContext(l)
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if err != nil {
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return nil, err
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}
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return &epm, nil
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}
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}
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return nil, nil
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}
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// GetCurrentEndpoint returns the current default endpoint value
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func GetCurrentEndpoint(dockerCli command.Cli) (string, error) {
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name := dockerCli.CurrentContext()
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if name != "default" {
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return name, nil
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}
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dem, err := GetDockerEndpoint(dockerCli, name)
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if err != nil {
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return "", errors.Errorf("docker endpoint for %q not found", name)
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} else if dem != nil {
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return dem.Host, nil
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}
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return "", nil
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}
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