DockerCLI/cli/compose/convert/volume.go

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package convert
import (
composetypes "github.com/docker/cli/cli/compose/types"
"github.com/docker/docker/api/types/mount"
"github.com/pkg/errors"
)
type volumes map[string]composetypes.VolumeConfig
// Volumes from compose-file types to engine api types
func Volumes(serviceVolumes []composetypes.ServiceVolumeConfig, stackVolumes volumes, namespace Namespace) ([]mount.Mount, error) {
var mounts []mount.Mount
for _, volumeConfig := range serviceVolumes {
mount, err := convertVolumeToMount(volumeConfig, stackVolumes, namespace)
if err != nil {
return nil, err
}
mounts = append(mounts, mount)
}
return mounts, nil
}
func convertVolumeToMount(
volume composetypes.ServiceVolumeConfig,
stackVolumes volumes,
namespace Namespace,
) (mount.Mount, error) {
result := mount.Mount{
Type: mount.Type(volume.Type),
Source: volume.Source,
Target: volume.Target,
ReadOnly: volume.ReadOnly,
Consistency: mount.Consistency(volume.Consistency),
}
// Anonymous volumes
if volume.Source == "" {
return result, nil
}
if volume.Type == "volume" && volume.Bind != nil {
return result, errors.New("bind options are incompatible with type volume")
}
if volume.Type == "bind" && volume.Volume != nil {
return result, errors.New("volume options are incompatible with type bind")
}
if volume.Bind != nil {
result.BindOptions = &mount.BindOptions{
Propagation: mount.Propagation(volume.Bind.Propagation),
}
}
// Binds volumes
if volume.Type == "bind" {
return result, nil
}
stackVolume, exists := stackVolumes[volume.Source]
if !exists {
return result, errors.Errorf("undefined volume %q", volume.Source)
}
result.Source = namespace.Scope(volume.Source)
result.VolumeOptions = &mount.VolumeOptions{}
if volume.Volume != nil {
result.VolumeOptions.NoCopy = volume.Volume.NoCopy
}
// External named volumes
if stackVolume.External.External {
result.Source = stackVolume.External.Name
return result, nil
}
if stackVolume.Name != "" {
result.Source = stackVolume.Name
}
result.VolumeOptions.Labels = AddStackLabel(namespace, stackVolume.Labels)
if stackVolume.Driver != "" || stackVolume.DriverOpts != nil {
result.VolumeOptions.DriverConfig = &mount.Driver{
Name: stackVolume.Driver,
Options: stackVolume.DriverOpts,
}
}
// Named volumes
return result, nil
}