chore(engine): ping docker daemon

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

engine/docker.go

@@ -0,0 +1,39 @@
+package engine
+
+import (
+	"context"
+
+	"github.com/docker/docker/client"
+)
+
+// Opts configures the Docker engine.
+type Opts struct {
+	HidePull bool
+}
+
+type Docker struct {
+	client   client.APIClient
+	hidePull bool
+}
+
+func New(client client.APIClient, opts Opts) *Docker {
+	return &Docker{
+		client:   client,
+		hidePull: opts.HidePull,
+	}
+}
+
+// NewEnv returns a new Engine from the environment.
+func NewEnv(opts Opts) (*Docker, error) {
+	cli, err := client.NewClientWithOpts(client.FromEnv)
+	if err != nil {
+		return nil, err
+	}
+	return New(cli, opts), nil
+}
+
+// Ping pings the Docker daemon.
+func (e *Docker) Ping(ctx context.Context) error {
+	_, err := e.client.Ping(ctx)
+	return err
+}