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moby--moby/api/client/container/wait.go

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package container
import (
"fmt"
"strings"
"golang.org/x/net/context"
"github.com/docker/docker/api/client"
"github.com/docker/docker/cli"
"github.com/spf13/cobra"
)
type waitOptions struct {
containers []string
}
// NewWaitCommand creates a new cobra.Command for `docker wait`
func NewWaitCommand(dockerCli *client.DockerCli) *cobra.Command {
var opts waitOptions
cmd := &cobra.Command{
Use: "wait CONTAINER [CONTAINER...]",
Short: "Block until a container stops, then print its exit code",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.containers = args
return runWait(dockerCli, &opts)
},
}
cmd.SetFlagErrorFunc(flagErrorFunc)
return cmd
}
func runWait(dockerCli *client.DockerCli, opts *waitOptions) error {
ctx := context.Background()
var errs []string
for _, container := range opts.containers {
status, err := dockerCli.Client().ContainerWait(ctx, container)
if err != nil {
errs = append(errs, err.Error())
} else {
fmt.Fprintf(dockerCli.Out(), "%d\n", status)
}
}
if len(errs) > 0 {
return fmt.Errorf("%s", strings.Join(errs, "\n"))
}
return nil
}