docker/swarmkit

package flagparser

import (
    "fmt"
    "strings"

    "github.com/moby/swarmkit/v2/api"
    "github.com/spf13/pflag"
)

// parseBind only supports a very simple version of bind for testing the most
// basic of data flows. Replace with a --mount flag, similar to what we have in
// docker service.
func parseBind(flags *pflag.FlagSet, spec *api.ServiceSpec) error {
    if flags.Changed("bind") {
        binds, err := flags.GetStringSlice("bind")
        if err != nil {
            return err
        }

        container := spec.Task.GetContainer()

        for _, bind := range binds {
            parts := strings.SplitN(bind, ":", 2)
            if len(parts) != 2 {
                return fmt.Errorf("bind format %q not supported", bind)
            }
            container.Mounts = append(container.Mounts, api.Mount{
                Type:   api.MountTypeBind,
                Source: parts[0],
                Target: parts[1],
            })
        }
    }

    return nil
}