DockerCLI/cli/command/container/wait.go

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package container
import (
"fmt"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type waitOptions struct {
containers []string
}
// NewWaitCommand creates a new cobra.Command for `docker wait`
func NewWaitCommand(dockerCli command.Cli) *cobra.Command {
var opts waitOptions
cmd := &cobra.Command{
Use: "wait CONTAINER [CONTAINER...]",
Short: "Block until one or more containers stop, then print their exit codes",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.containers = args
return runWait(dockerCli, &opts)
},
}
return cmd
}
func runWait(dockerCli command.Cli, opts *waitOptions) error {
ctx := context.Background()
var errs []string
for _, container := range opts.containers {
resultC, errC := dockerCli.Client().ContainerWait(ctx, container, "")
select {
case result := <-resultC:
fmt.Fprintf(dockerCli.Out(), "%d\n", result.StatusCode)
case err := <-errC:
errs = append(errs, err.Error())
}
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, "\n"))
}
return nil
}