ctr: move tasks, run to commands package

Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>

cmd/ctr/commands/tasks/tasks_windows.go

@@ -0,0 +1,55 @@
+package tasks
+
+import (
+	gocontext "context"
+	"time"
+
+	"github.com/containerd/console"
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/log"
+	"github.com/pkg/errors"
+)
+
+// HandleConsoleResize resizes the console
+func HandleConsoleResize(ctx gocontext.Context, task resizer, con console.Console) error {
+	// do an initial resize of the console
+	size, err := con.Size()
+	if err != nil {
+		return err
+	}
+	go func() {
+		prevSize := size
+		for {
+			time.Sleep(time.Millisecond * 250)
+
+			size, err := con.Size()
+			if err != nil {
+				log.G(ctx).WithError(err).Error("get pty size")
+				continue
+			}
+
+			if size.Width != prevSize.Width || size.Height != prevSize.Height {
+				if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
+					log.G(ctx).WithError(err).Error("resize pty")
+				}
+				prevSize = size
+			}
+		}
+	}()
+	return nil
+}
+
+// NewTask creates a new task
+func NewTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, _ string, tty, nullIO bool) (containerd.Task, error) {
+	io := containerd.Stdio
+	if tty {
+		io = containerd.StdioTerminal
+	}
+	if nullIO {
+		if tty {
+			return nil, errors.New("tty and null-io cannot be used together")
+		}
+		io = containerd.NullIO
+	}
+	return container.NewTask(ctx, io)
+}