DockerCLI/cli/command/cli_options.go

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package command
import (
"fmt"
"io"
"os"
"strconv"
"github.com/docker/cli/cli/context/docker"
"github.com/docker/cli/cli/context/store"
"github.com/docker/cli/cli/streams"
"github.com/moby/term"
)
// DockerCliOption applies a modification on a DockerCli.
type DockerCliOption func(cli *DockerCli) error
// WithStandardStreams sets a cli in, out and err streams with the standard streams.
func WithStandardStreams() DockerCliOption {
return func(cli *DockerCli) error {
// Set terminal emulation based on platform as required.
stdin, stdout, stderr := term.StdStreams()
cli.in = streams.NewIn(stdin)
cli.out = streams.NewOut(stdout)
cli.err = stderr
return nil
}
}
// WithCombinedStreams uses the same stream for the output and error streams.
func WithCombinedStreams(combined io.Writer) DockerCliOption {
return func(cli *DockerCli) error {
cli.out = streams.NewOut(combined)
cli.err = combined
return nil
}
}
// WithInputStream sets a cli input stream.
func WithInputStream(in io.ReadCloser) DockerCliOption {
return func(cli *DockerCli) error {
cli.in = streams.NewIn(in)
return nil
}
}
// WithOutputStream sets a cli output stream.
func WithOutputStream(out io.Writer) DockerCliOption {
return func(cli *DockerCli) error {
cli.out = streams.NewOut(out)
return nil
}
}
// WithErrorStream sets a cli error stream.
func WithErrorStream(err io.Writer) DockerCliOption {
return func(cli *DockerCli) error {
cli.err = err
return nil
}
}
// WithContentTrustFromEnv enables content trust on a cli from environment variable DOCKER_CONTENT_TRUST value.
func WithContentTrustFromEnv() DockerCliOption {
return func(cli *DockerCli) error {
cli.contentTrust = false
if e := os.Getenv("DOCKER_CONTENT_TRUST"); e != "" {
if t, err := strconv.ParseBool(e); t || err != nil {
// treat any other value as true
cli.contentTrust = true
}
}
return nil
}
}
// WithContentTrust enables content trust on a cli.
func WithContentTrust(enabled bool) DockerCliOption {
return func(cli *DockerCli) error {
cli.contentTrust = enabled
return nil
}
}
// WithContextEndpointType add support for an additional typed endpoint in the context store
// Plugins should use this to store additional endpoints configuration in the context store
func WithContextEndpointType(endpointName string, endpointType store.TypeGetter) DockerCliOption {
return func(cli *DockerCli) error {
switch endpointName {
case docker.DockerEndpoint:
return fmt.Errorf("cannot change %q endpoint type", endpointName)
}
cli.contextStoreConfig.SetEndpoint(endpointName, endpointType)
return nil
}
}